TW477817B - Metal smelting method and apparatus therefor - Google Patents

Abstract

The present invention provides a method wherein smelting reduction of metal oxides and/or metal hydroxides such as iron ores are carried out to produce a molten metal at a low cost and high productivity. To attain it, at least metal oxides and/or metal hydroxides such as iron ores and carbonaceous materials are previously mixed, mixed and agglomerated, or mixed and molded to form a mixture. The mixture is pre-reduced in a rotary hearth furnace type or a rotary kiln type pre-reduction furnace to obtain an average metallization degree of metal oxides and/or metal hydroxides, which is 5-55%. The pre-reduced mixture is charged into a smelting furnace for refining. The charged mixture is smelted and finally reduced by using the carbonaceous material as reducing agent and by using, as heat source, combustion heat of the carbonaceous material and combustion heat of carbon monoxide which is generated in the smelting furnace. As a result, molten metal such as molten iron is produced while maintaining a good energy balance and achieving a high productivity.

Description

477817

[Technical Field] The present invention relates to a kind of metal chain made of German & hydrogen type oxide, which is prepared to be reduced to a metal oxide chain and / or a metal melting reduction furnace. Bath 丨,; Ceremony ~ Yu & _ t chain melting with a melting furnace and final return ', and pay ... masculine metal chain method and the equipment suitable for its implementation [Background] So far, rotary furnaces have been used A bed-type heating furnace is a technology for producing semi-reduced iron by reducing metal oxides and metal hydroxides such as iron ore (hereinafter, in the description of conventional technologies, taking π iron ore π as an example) to produce chains, It is already known. About this technology, for example, in rc〇MET A New Coal Based Process for the Production of DRI,

In "Ironmaking MPT International Feb · (1997)", there is a method for reducing the chain of powdery granular carbon materials and iron ore in a mixed state. In "The FASTMET DIRECT REDUCTION PROCESS,

"Ironmaking Conference Proceeding (1993)" or "Charging molten iron into the EAF, New steel nov · (1 997) ρ · 72" shows that iron ore is made of carbon material and pelletized to reduce it. Method of making chain. These processes are the process of using solid carbon or carbon compounds as reducing materials to reduce iron ore (Fe203 + 3C = 2Fe + 3C0). The necessary energy for the reduction reaction is an endothermic reaction. Carbon monoxide (C0) or separately supplied fuel (natural gas, oil fuel, coal, plastics, etc.) is supplied by burning air, etc., and self-reduction furnace, approximately 2 00 ~ 1 500 ° C is almost completely burned

477817 V. Description of the invention (2) The gas is discharged. Compared with other direct reduction iron-making processes using hydrocarbon compounds such as natural gas or 3 hydrogen gas as reducing materials, these processes have the great advantage that coal can be used as a reducing material with excellent availability or transportability. Therefore, it is the day of the furnace or the construction or construction of the implementation of these processes. — However, on the other hand, the above process has the disadvantages that two parts (about 20 to 30%) of sulfur (s) contained in coal and the like remain in reduced iron, as well as the disadvantage of low energy efficiency. In addition, the s remaining in the reduced iron cannot be removed at the steelmaking stage (the state of dazzling steel), which is also very disadvantageous in cost. Therefore, 'the reduced iron is temporarily formed into molten iron and then desulfurized, which can be called The above is a single and general method. Therefore, it is necessary to combine the reduced iron manufacturing process and the water manufacturing process. As a smelting reduction process of iron ore using this technology, there has been a method of charging iron ore with a carbon material into a rotary hearth type preliminary reduction furnace (Rotary hearth type furnace, hereinafter referred to as "RHF"). ), The iron ore is prepared with carbon material and reduced to a reduced iron (for example, reduced iron with a metallization rate of 90% or more), and the reduced iron is an electric iron furnace (submerged arc furnace, hereinafter referred to as "njAF") is a smelting reduction chain (refining chain = melting and final reduction f), and the technology for manufacturing molten iron (hereinafter referred to as the first technology) has been known. On the other hand, as a metal bath type melting The smelting reduction technology of iron ore in the reduction furnace is known as the DI0s method, HISmelt method,

Romel's Law, etc. ("Recent Trends in New Iron Sources", September 29, 2008, issued by the Japan Iron and Steel Association Process Forum) have been known, this one melts ^ // ^ 17

: There is also a reduction technology in which iron ore material and carbon material are loaded into rhf "Γ to prepare a semi-reduced plutonium of the original chain, and then the semi-reduced iron bath type dazzling reduction furnace (hereinafter referred to as" SRF ") Melt reduction chain (refining = melting and final reduction), and the technology for making molten iron (hereinafter referred to as the first order technology 2) has not been disclosed in Japanese Patent Application Laid-Open No. 217614.

aThese technologies are intended to reduce the iron ore as much as possible to form a semi-reduced iron with a metallization rate in the south, and then to refine the chain. The preliminary reduction chain makes the average metallization rate of the manufactured semi-reduced iron more than 90%, and the second technology of the prior art revealed that the preliminary reduction chain using RHF makes the average metallization rate of the semi-reduced iron manufactured. More than 60%. However, as conventional techniques attempt to produce semi-reduced iron with a high metallization rate in the preliminary reduction production chain, there will be the following major problems.

Figure 1 shows the mixture of iron ore, carbon material, auxiliary raw materials, and other raw materials into pellets with a particle size of about 10 mm, and then prepared by RHF for reduction. Relation between residence time and average metallization rate of iron ore (semi-reduced iron). As shown in the figure, when the preliminary reduction treatment is performed so that the average metallization rate of iron ore reaches about 90%, the reduction reaction hardly proceeds. Therefore, in order to make the average metallization rate of the semi-reduced iron manufactured to 90, At a high level of more than%, it is necessary to reduce the average metallization rate of the pellet center to about 90%. Here, the reduction reaction speed in the pellets is generally determined by the fact that there is a sufficient amount of carbon material in the pellets as a reducing material, so the amount of carbon material is not determined.

477817 V. Description of the invention (4) Rate ’On the other hand, the reduction reaction in the pellet will proceed if necessary heat is supplied.) Therefore, the heat transfer rate determines the reaction rate. The heat source necessary for this reduction reaction is the flammable gas generated from the pellets (the volatile component generated from the carbon material, the co gas generated from the reduction of the ore caused by the carbon material, etc.), or supplied to the RHF by other means The fuel gas is given by combustion in RHF. During the reduction and roasting of the pellets in the RHF, the atmosphere in the J furnace will become a "high temperature around the radon" due to the above-mentioned firing process. From this high temperature gas = the raw material (pellet) layer deposited on the hearth The surface radiation heat transfer of the first, iif: The pellets are heated 'then' #from the heat transfer from the uppermost pellets to the main body, and the pellets on the lower side are also sequentially heated. Ir = the uppermost layer The pellets were first restored. In contrast, the lowermost ai door was lowered. Therefore, if there is not enough room in the furnace to stay in the temple, the lowermost pellets will be metalized if the thickness of the raw material layer. There are inconsistent reports s: the original state is discharged again, the more the metallization rate of the pellet: the lower the 'clear shape, the thicker the part of the lower layer side. On the other hand, the appropriate method for the pellet. That is, the raw material layer Heat transfer ::; Near: There is the following-Generally speaking, contact heat transfer is the main body. Therefore, the observation of the heat transfer property in the layer-to-layer direction between the pellets in point contact is to ensure the number of raw materials to as much as possible. If the number of layers of the pellets in the four layers of the raw material layer is small, the particle size should be reduced. The size of the pellets is preferably large. However, from another point of view, in terms of pellets, the heat is from the outside of the pellets = 2 J from the heat transfer within each pellet. The slower the reduction of the center of the granule, especially the middle = page 10 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 1 V. Description of the invention (5) The problem of low rate of chemical conversion, so that the center is 4 to 1 The heat transfer time is short and, from the viewpoint, the smaller the particle size is, the more appropriate the particle size range is to the point of the pellet. Therefore, considering the above point from the above point of view, for example, it has to be limited. The ground is extremely narrow. In the case of the metallization rate, "pill-first technology is used to ensure high pre-reduction time in RHF, etc .: operation; particle size or number of layers, thickness of raw material layer, (1) The metal H has the following restrictions. Necessity of quality or coordination. Rate uniformity, there are products of the pellet raw materials (2) for the same reason, and in order to prevent the pellets from breaking, there is a need to uniformize the particle size of the edges, (3) the use of pellets is relatively inhibited 77 The need for a binding agent. necessary. The hearth is filled with a uniform and minimum layer thickness. (4) The residence time in the RHF is sufficient. Due to these restrictions, it is not only necessary. High, productivity will also be reduced, and the thermal efficiency f equipment cost is directly above the pellet it: occasion, F's hearth direction, therefore, after the preliminary reduction, = (secondary sintering) tilt When the pill bed is fed out by a water-cooled spiral discharge device, etc., the method of identifying the shape will cause the hearth to be refractory, which will cause problems such as cost and time required for maintenance. The deduction of flying snails is fierce, and if the powdery and granular mixture of ore and mineral materials is not prepared in the form of RHF, the problem will be the same as the above ⑴ ~ Ύ. There will also be the same right. Page 11: C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 V. Description of the invention (6) The raw materials of the mixture are pelletized, and the powdery and granular mixture is prepared by RHF preliminary reduction. In the case of chain, the heat transfer property of the atmosphere from the furnace to the raw material layer is significantly lower than that in the case of pelletizing the mixture raw material, so there is a problem that the properties are even lower. [Summary of the Invention] Based on this, the inventors of the present invention carried out the modification of the above-mentioned conventional molten iron process based on the viewpoint of describing molten iron to the same productive manufacturing in the molten reduction of iron ore, that is, to carry out The iron ore was prepared to reduce the chain, and the semi-refining and melting reduction chain (refining chain = final reduction and dissolution) was made to pay for the transformation of the molten iron process. Finally, the following facts were identified. The iron head mRHF prepares the iron ore to reduce the chain to produce a semi-reduced process. The process of producing molten iron by saf melting and reducing the chain, the metallization rate of the obtained semi-reduced iron and the process integration # amp ί s is consumption The relationship between the original energy unit and the energy balance): The semi-reduced iron obtained by gold also prepares the iron ore to reduce the production chain to produce a semi-reduced relationship with the overall production efficiency of the process: the technically high water standard / process m If the metalization rate is set to be specific to the deterioration of the original energy consumption original unit and the energy balance, and the metallization rate of the semi-reduced iron obtained by u is suppressed: f If here is to be suppressed to a specific low level, the process

477817 V. Description of the invention (7) The overall production efficiency is effectively improved, and high productivity can be obtained. In addition, according to this method, the SRF is used to perform the smelting reduction chain production process. The semi-reduced iron with a low metallization rate is extremely advantageous in terms of energy consumption and energy balance. Therefore, it can be completely eliminated by RHF. Preparing a mixture of raw materials (pelletized or unpelletized mixture raw materials) in the same way as conventional technology when preparing and reducing the chain, while ensuring high productivity, reducing the time and equipment cost of preparing and reducing the chain. The present invention is based on this knowledge and development. The main purpose of the present invention is to provide a method that can reduce the metal oxides and / or metal hydroxides of iron ore and other metal hydroxides in a low-cost and highly productive manner. Metal chain method for making molten metal. According to the present invention, the above object can be achieved by the following metal chain method. [1] A metal chain method, comprising: h-using a metal oxide and / or metal hydroxide in a preliminary reduction furnace of a mixture of one or more materials selected from the following (a) to (c) The level of the metallization rate of the material becomes 5 ~ 55%, the step of pre-reduction (ai). R (:) to carbon: a mixture of raw materials mixed with metal oxides and / or metal hydroxides, (b) to a raw material of a mixture obtained by mixing and granulating a carbon material with a metal oxide and / or a metal hydroxide, (i.e., at least forming a carbon material with a metal oxide and / or a metal hydroxide; The raw material of the mixture; and a raw material of the mixture prepared to be reduced in this step (A1) is put into the metal page 13 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 V. Description of the invention (8) Dissolution of the chain Furnace, in the melting furnace, using carbon material as the reducing material, and using the combustion heat of the stone anti-material and the combustion heat of a carbon oxide generated in the furnace as the main heat source to perform refining and final reduction (B 1) [2] A metal chain method, characterized in that: It has: ^ one will be selected from In the preliminary reduction furnace, the raw materials of one or more of the mixtures in the columns (a) to (c) are subjected to a preliminary reduction step such that the average metallization rate of the metal oxide and / or metal hydroxide exceeds 5% ( A2): (a) at least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) mixing and granulating at least a carbon material with a metal oxide and / or a metal hydroxide The mixture raw material obtained, (c) a mixture raw material obtained by mixing and forming at least a carbon material with a metal oxide and / or a metal hydroxide; and a mixture raw material to be reduced by the following step (A2), The metal oxides and / or metal hydroxides of (1) and / or (i) (i) have a lower metal oxide and / or metal hydrogen ratio than the raw material of the mixture prepared in step (A2). Oxides, (1 1) metal oxides and / or metal hydroxides that have not been preliminarily reduced, and the average metallization rate of the two metal oxides and / or metal hydroxides is 5 to 55% Proportionally installed in the melting furnace for metal chains In the furnace, the carbon material is used as a reducing material, and the combustion heat of the carbon material and the combustion heat of carbon monoxide generated in the furnace are used as the main heat sources to perform melting and final reduction steps (B2).

I Page 14 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817

[3] The above-mentioned metal chain method of [1] or [2], wherein the high-temperature mixture fed out after the preliminary reduction in the pre-furnace is stored in a non-open Beijing container or a non-oxidizing gas is used as the transport gas. Gas delivery device, non-open type container or gas delivery device is maintained at a temperature above 600 ° C, and is transferred to the melting furnace 'and loaded into the melting furnace. [4] The metal chain method of the above [2] or [3], wherein the step ()

The raw material of the mixture to be reduced and the metal oxide and / or metal hydroxide of (i) and / or (11), the average metallization ratio of the two in the total metal oxide and hydroxide is 5 to 55. The proportion of% is mixed and then put into a melting furnace for metal chains. [j] The above [4] = is a chain-making method, in which the high-temperature mixture raw materials fed out after the preliminary reduction in the preliminary reduction furnace, and the metal oxides of (丨) and / or (i 丨) and / or The metal hydroxide is contained in a non-open type gas delivery device in which the oxidizing gas is a transport gas, and the non-open type container or gas delivery device is used to transfer the metal hydroxide to the melting furnace and put it into the melting furnace. . [ρ The metal chain method of any one of the above [1] to [5], wherein the secondary combustion rate of the gas generated in the melting furnace is more than 20%.

[7] The metal chain method according to any one of the above [1] to [6], wherein the carbon material is supplied to the melting furnace in addition to the carbon material in the raw material of the mixture. [8] The above [7] = metal chain method, wherein the step (A1) or the high-temperature mixture raw material prepared in the reduction step (except that the raw material prepared in the step (A2) includes ⑴ and / or ⑴) Metal oxides and / or gaseous emulsifiers are mixed) and carbon materials are put into the melting furnace at the same time, and the input raw materials and carbon materials are mixed in at least a part of each

4 // M / 5. Description of the invention (10) Those who have fallen in the furnace in the state and reached the bath surface. [9] The metal chain method furnace according to any one of the above [8] to [8] is a metal bath type smelting reduction furnace. Resolve the metal chain method of [9] in [original 1 sd1]. In this preparation, in addition to reducing the raw materials of the mixture, an oxide layer is formed on the surface layer of the original zircon. [11] The above [10] metal chain, a part of the belt, or the is: in the whole area, the reduction of the preliminary reduction furnace is more than 30%. The degree of gas oxidation of the bust in the furnace is set to [12] any of the above [1] to [π] _ in the reduction furnace, as the combustion gas, it is on the chain f ', where the preparation [⑴ aforementioned ΠΗ⑴ 中 任―The money is provided to those who produce gas in the refining / silk furnace. In the metal chain method, after the bean medium is discharged from the melting furnace, the melting temperature is less than 300 t. I ^ T f § ^ ^ ^ η, ^ < The gas generated in the bath furnace and / or should be supplied To prepare for the combustion of the original furnace, use the negative 舻 .., ^^ 3 turbulent bodies, and use the sensible heat of the exhaust gas discharged from the preliminary reduction furnace and / or the partial combustion of the gas generated in the melting furnace. The sensible heat of the exhaust gas preheats the original furnace. [14J After the metal chain method of any one of [1] to [11] above, the gas produced by the dissolution furnace that is not fOOt and / or the oxygen-containing gas (0) for combustion support that should be supplied to the preliminary reduction furnace, is as follows The following steps (1) and (1 1) are preheated and then supplied to the preliminary reduction. °) Leader 50 (step 4 of TC… heat preheating

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 16 477817

(ii) The pre-heated generation gas (s) and / or the oxygen-containing gas (0) for combustion support are used in the above-mentioned step (i), and the exhaust gas from a part of the above-mentioned generation gas (s) is used. And / or the step of preheating the exhaust gas obtained by burning other combustion, and then increasing the temperature. Hot [1 5] The metal chain method of any one of the above [1] to [1 4], in which in addition to the raw materials of the mixture in the standby reduction furnace, the auxiliary raw materials to be loaded and pre-furnaceed At least part of it. [1 6] The above-mentioned [1 5] metal chain method, wherein at least a part of the pre-reduction auxiliary raw material charged is an uncalcined auxiliary raw material, and the auxiliary raw material is calcined in a pre-reduction furnace. . μ # The metal chain method in any one of [1] to [1 6] above, wherein the raw material of the mixture in the preliminary reduction furnace includes a self-refining furnace into the recovered dust. Solitary gas [1 8] The metal chain method of any one of the above [1] to [1 7], wherein the series material is classified according to the particle size, and the carbon material on the fine particle side is charged as a preliminary reduction 焯: Carbonate The carbon material in the raw material is used, and the carbon material on the coarse grain side is used as the mixed carbon material. [1 9] The metal chain method of any one of the above [1] to [1 8], wherein the raw material of the mixture into the preliminary reduction furnace or the raw material forming the mixture is:

Constitute at least a part of the raw materials, and use the effluent from the preliminary reduction furnace: = sensible heat and / or latent gas generated by each body and / or melting furnace, and the gas is discharged. ", Yu preheating and drying [20] the metal chain method of any one of the above [1] to [19], the preparation reduction furnace is a rotary reduction furnace type preparation reduction furnace

477817 V. Description of the invention (12) Under the layer of powder and granules that are not fed from the raw material inlet and outlet on the hearth, the preliminary reduction of the mixed raw materials is performed. [2 1] The metal chain method according to any one of the above [1] to [2 0]. As a preliminary reduction furnace, Langzhong uses a rotary hearth type preliminary reduction furnace; the raw material layer to be fed from the raw material feed outlet At least one of the materials selected from the group consisting of a mixture of raw materials, metal oxides and / or metal hydroxides, auxiliary raw materials to be charged in a melting furnace, and carbon materials is charged as a cooling material, and the raw materials provided at the raw material feed-out openings are charged. The discharge device feeds the processed raw materials to the outside of the furnace in a state where the cooling materials are mixed. [2 2] The metal chain method of the above-mentioned [2 1], wherein the amount of Fe (A) in the cooling material charged in the raw material layer and the weight ratio (A) of Fe in the raw material constituting the raw material layer> / (B) is from 1/10 to 1/1. [2 3] The metal chain method according to any one of the above [1] to [2 2], wherein the uncalcined auxiliary raw material is calcined by contacting it with a high-temperature exhaust gas discharged from a preliminary reduction furnace, and then Load the melting furnace. [2 4] The metal chain method of [2 3] above, wherein the high-temperature exhaust gas used for the calcination of the unburned auxiliary raw materials is used to preheat the air, and the preheated air is supplied to the preliminary reduction furnace. [25] The metal chain method according to any one of the above [1] to [24], wherein the secondary combustion rate of the gas generated in the melting furnace is set to 20% or more, and the pre-reduction furnace is supplied to the melting furnace. The generated gas is used as a combustion gas. [26] The metal chain method according to any one of the above [Π] to [24], in addition to the carbon material in the raw material of the mixture, the carbon material is supplied to the melting furnace; and the secondary combustion rate of the gas generated in the melting furnace is also provided. Set to more than 20%;

C: \ 2D-00DE \ 90-02 \ 891l8226.ptci Page 18 477817 V. Description of the invention (13) The gas produced by the preliminary reduction furnace to the dissolution furnace is used as the combustion gas. [27] The metal chain method according to any one of the above [1] to [24], wherein the raw material of the mixture to be loaded into the preliminary reduction furnace or at least a part of each constituent raw material before forming the raw material of the mixture is prepared by using self-preparation The sensible heat and / or latent heat of the exhaust gas discharged from the reduction furnace and / or the hair gas of the dissolution furnace are preheated and dried; in addition, the secondary combustion rate of the gas generated in the melting furnace is set to more than 20%; The gas produced by the reduction furnace is supplied by the reduction furnace as a combustion gas. [28] The metal chain method according to any one of the above [1] to [24], wherein the raw material of the mixture to be charged in the preliminary reduction furnace or at least a part of each raw material before forming the raw material of the mixture is used from Preheating the exhaust gas from the reduction furnace and / or the sensible and / or latent heat of the gas generated by the preheating furnace, preheating and drying; and 'for carbon materials other than the carbon material in the raw material of the mixture supplied in the preheating furnace; another' The secondary combustion rate of the gas generated by the melting furnace is set to more than 20%; and the gas generated from the melting furnace is supplied to the preliminary reduction furnace as a combustion gas. [2 9] The metal chain method according to any one of [1] to [2 4], wherein the raw material of the mixture to be charged into the preliminary reduction furnace or at least a part of each of the constituent materials before forming the raw material of the mixture, Use the exhaust gas discharged from the preliminary reduction furnace and / or the sensible and / or latent heat of the gas generated in the melting furnace to preheat and dry it. For carbon materials other than the carbon material in the raw material of the mixture supplied in the melting furnace, The secondary combustion rate of the gas generated by the melting furnace is set to 20% to ^; and the gas generated from the melting furnace is supplied to the preliminary reduction furnace as a combustion gas. In addition, the high-temperature

477817 The raw material of the mixture is stored in a closed container or a gas delivery device using a gas. Using this closed container, the chemical gas is transported to a melting temperature of 1 ° C or above at a temperature of 60 ° C or above. The device is maintained at Insider. Wind, and put it into the melting furnace according to the energy efficiency and energy balance of the gold of the present invention shown in the above [1] to [29], the iron ore I chain method can be used to melt good or metal hydroxide Metal oxides and molten metals that are reduced and can be easily attacked. Productive manufacturing

In addition, for other purposes of the present invention, the equipment or other equipment containing other raw materials is suitable for applying the metal chain method. The metal chain method, which is advantageous for the preparation, and the method and equipment suitable for the chain method. According to the present invention, this 10% objective can be made of the following metal [3 0]-a metal chain method, which is characterized by having: ^, one or more of the raw materials of the mixture of the following ⑷ ~ (c), ' In the rotary hearth type pre-reduction furnace, pre-reduction is performed in such a manner that the metal oxide and / or metal hydroxide has a degree of damage to the metallized state. Step (A):

(a) a raw material for a mixture obtained by mixing at least a carbon material with a metal oxide and / or a metal hydroxide, (b) a mixture obtained by mixing and granulating at least a carbon material with a metal oxide and / or a metal hydroxide Raw materials, (c) mixing at least carbon materials with metal oxides and / or metal hydroxides and

Formed mixture raw materials; and a decontamination furnace to be used in the mixture chain prepared to be reduced in step (A), in the decontamination furnace, the combustion heat of the carbon-made materials and the heat generated in the furnace—k = In order to contain the raw materials, the source is subjected to the melting and final reduction step d. The combustion heat of the slave is the main heat. In the above step (A), a rotary hearth type preliminary reduction furnace with inlets at two locations in the circumferential direction is used. , And then the raw materials are loaded into the raw material into the shoulder of the mixture in sequence: from :? During the period from when the raw material layer of the mixed raw material loaded on the hearth to the raw material is filled with the mixed raw material, a preliminary reduction of the mixed raw material is performed by a steamer, 1 jf shoman style. Dividing the σ heat square J "1" i. [30] of the metal chain method ', which is used in the line in the circumferential direction, etc. There are two or more raw materials loaded into the line: the raw restorer. W 心口 物 [32] — A metal chain device, which is characterized by: ^ In the circumferential direction, there are raw material inlets at two or more locations, and a mixture of one or more of ^ (a) ~ (C) Rotary hearth type pre-reduction furnace for raw material loading: € ^ (a) at least a mixture of carbon materials and metal oxides and / or metal hydroxides, and (b) at least carbon Raw materials obtained by mixing and granulating materials with metal oxides and / or metal hydroxides, (c) mixing at least carbon materials with metal oxides and / or metal hydroxides and

477817 V. Description of the invention (16) " ---- The raw materials of the mixture obtained by forming; and the raw materials of the mixture to be reduced by the preliminary reduction furnace, using carbon materials as return materials, and the combustion heat of The melting of carbon oxide in the furnace = "", as the main heat source, the melting furnace for metal chains to be melted and finally reduced. 0] 3] The metal chain equipment of the above [32], which has Prepare a high-temperature exhaust gas discharged from the original furnace, and contact the uncalcined auxiliary raw material that should be put into the melting furnace, and use it to calcinate the auxiliary raw material. [34] of the above [32] or [33] [35] Metal chain equipment, in which more than two raw material loading inlets of the preparatory furnace are placed at equal intervals in the circumferential direction. [35] A metal chain method, which is characterized by: In the rotary hearth type preliminary reduction furnace in (a) to (c) below, a part of the compound is metallized. Step (A): One or more mixture raw materials, in metal oxide and / or metal (A) at least carbon and gold It is a mixed raw material obtained by mixing oxides and / or metal hydroxides, and (b) a mixed raw material obtained by mixing and granulating at least carbon materials with metal oxides and / or metal hydroxides, " " (C) at least a mixed raw material obtained by mixing and forming a carbon material with a metal oxide and / or a metal hydroxide; and a mixed raw material prepared by the step (A) to be reduced into a melting furnace for a metal chain In the melting furnace, carbon material is used as the reducing material, and ^

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 22 1/1 / Fifth, the description of the invention (17) 5 materials and the combustion heat of carbon oxide in the furnace are the main sources of leakage, and The solution and the final reduction are mainly heated in the above step (A). The metal in the lowermost layer of the 仫 -layer is formed on the rotary hearth of the reduction furnace-under the lower layer, and the metal hydroxide is produced. The material ratio is f ^ q W, +, p At. Department, which is composed of a layer that should be loaded with 'the bottom layer of which the raw material layer is the main layer', or a pair of metal chain method, which is characterized by:, ": a) ~ (0) One or more mixtures of raw materials are prepared in a ^ hearth-type prereduction reduction furnace in such a way that the metal oxide and / step part are in a metalized state. Metal oxide and / or Jinchuan (C) at least the raw material of the carbon material and the metal oxide and / or all formed from the mixture; and the metal lice emulsion and a mixture of raw materials to be reduced by this step (A) , Into the melting furnace for the gold chain, in the melting furnace, the carbon material is returned / the combustion heat of the carbon material and the carbon monoxide combustion source in the furnace, the steps of melting and final reduction (B); ” "..." C: \ 2D-G0DE \ 90-02 \ 89118226.ptd Page 23 477817 V. Description of the invention (18) In the above step (A), it is placed on the rotary hearth of the preliminary reduction furnace. Powdered raw materials (which are selected from mixture raw materials, metal oxides and / One or more raw materials of metal hydroxides and carbon materials) and / or an input made of powders and granules of subsidiary raw materials to be charged in a melting furnace, or the above-mentioned powdery granular raw materials and / or the above-mentioned subsidiary raw materials powder After the main body is charged, the granulated material and / or formed body of the mixture raw material is loaded on the upper layer of the above-mentioned load on the downstream side of the rotary hearth moving direction. [38] The metal of [37] above The chain-making method, wherein in this step (a), the particle size of the powdery and granular particles charged on the rotary hearth is 0.05 to 10 mm. [39] One of [37] or [38] above Metal chain method, wherein in step (a), the powdery and granular loads charged on the rotary hearth are coal or coal-based loads. [40] [37] or [38] above The metal chain method, in which the powdery and granular charge charged into the rotary hearth in step (A) is an unfired auxiliary raw material or an object mainly composed of an uncalcined auxiliary raw material. 41] The metal chain method according to any one of the above [37] to [40], wherein in this step (A), granulated materials and / or granulated materials of the upper layer of the raw materials charged into the rotary hearth The “shape” is a granulated material and / or a shaped body that has not been previously dried. [4 2] A metal chain method, characterized in that: It is to be selected from one of the following (a) to (c) One or more raw materials of the mixture are prepared in a preliminary reduction furnace in a manner such that a portion of the metal oxide and / or the metal hydroxide reaches a metalized state (A): / δ 丄 7 5 2. Description of the invention (19) '------- a) at least a raw material of a mixture of carbon materials and metal oxides and / or metal hydroxides, (b) at least carbon materials and metal oxides And / or a mixed raw material obtained by mixing and granulating metal hydroxide, (c) a mixed raw material obtained by mixing and forming at least a carbon material with a metal oxide and / or metal hydroxide; and (A) The raw material of the mixture to be reduced is put into a melting furnace for metal f. In the melting furnace, a carbon material is used as a reducing material, and the combustion heat of the carbon material and the combustion heat of carbon monoxide generated in the furnace are used. As the main heat source, the steps of melting and final reduction (8); and Uncalcined auxiliary raw material above a melting furnace, the high temperature of the discharge from the preliminary furnace and the reducing calcination in step (c) contacting the discharge gas. [4 3] The metal chain method of the above [4 2], wherein the high-temperature exhaust gas used for the calcination of the auxiliary materials is used to preheat the air, and the preheated air is supplied to a preliminary reduction furnace. [44] A metal chain equipment, comprising: a pre-reduction furnace for charging one or more mixture raw materials selected from the following (a) to (c) for pre-reduction: (a) at least A raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) at least a raw material of a mixture obtained by mixing and granulating a carbon material with a metal oxide and / or a metal hydroxide, ° (c ) At least the slave material is mixed with metal oxides and / or metal hydroxides and

477817 Description of the five inventions (20) The raw materials of the mixture obtained from the molding · For the introduction of Gao々J discharged from the above-mentioned preliminary reduction furnace and the uncalcined that should be put into the melting furnace for metal chain: contact the calcining furnace which is calcined by the auxiliary raw materials of Lingrong Contact with Gyeonggi, and the raw material of the mixture to be reduced by the pre-reduction furnace will be used as the main heat source, with the heat of combustion of the carbon material and the heat generated in the furnace as the main heat source. ^ :: = Dagger Carbon Burner. Melting of metal chains for sintered metal [45] — A metal chain method, which is characterized by: It has: ^ one or more of the raw materials of a mixture of spines 3, in a pre-moving hearth type, a multi-layer hearth type or a rotary rich type In advance, in the reduction furnace, a step of preliminary reduction is performed in such a manner that one of the metal oxides and / or metal hydroxides reaches the state of the metalized mountain: a) at least the carbon material and the metal oxide and / Or a mixture of raw materials obtained by mixing metal hydroxides, (b) at least a raw material of mixtures obtained by mixing and granulating slave materials with metal oxides and / or metal hydroxides, (C) at least 5; A raw material of a mixture obtained by mixing and forming a metal with a metal oxide and / or a metal hydroxide; and a raw material of the mixture prepared to be reduced in this step (A), charged into a melting furnace for a metal chain, and in the melting furnace The carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat of one of the carbon oxides generated in the furnace are used as the main heat source 'to be melted and finally reduced (B);

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[46] The metal chain method of the above [45], the particle size of the warp stone in i, is 0.1 ~ 1mm. [47] A metal chain method, characterized in that: It has: '' A selected from the following (a) ~ (c) φ 夕 # ,,,, revolving embroidery ★ Seven Orthodox Church a mixture of more than one raw material ' In the 2 hearth type or horizontal moving hearth type pre-reduction furnace or metal hydroxide part of the metallization method, pre-reduction step (A): ^ r (:) Λ Less: a raw material for a mixture of carbon materials and metal oxides and / or metal hydroxides, a mixture of carbon materials and metal oxides and / or metal hydroxides and a mixture of & pellets and a small amount of carbon materials A raw material of a mixture obtained by mixing and forming with a metal oxide and / or a metal hydroxide; and a raw material of the mixture prepared to be reduced in this step (A) is charged into a melting furnace for a metal chain, and in the melting furnace, Carbon material is used as the reducing material, and the combustion heat of% carbon material and the combustion heat of one of the carbon oxides generated in the furnace are the main sources; the source is the step of melting and final reduction (B); ... the above step (A) is burned When heating the raw materials of the mixture, The above flame of a mixture of at least a portion of the raw material layer contacts .... [48] A metal chain equipment, characterized by:

C: \ 2D-OODE \ 90-02 \ 89118226.ptd Page 27 V. Description of the invention (22) It has: For one or more people selected from the following 歹, 丨 r, 、, i ^ to prepare and return more than one of L The original raw materials of the mixture are loaded into the original furnace: X original can be prepared along the converter hearth type or horizontal moving bed type (of; Kunzhi / thing mixed raw materials with metal oxides and / or metal hydroxides ^ I ' ^^ / ^^^ b ^ into (J) and Λ is formed by forming Λ material with metal oxides and / or metal hydrogen doves / complex raw materials; and: supplemented by a mixture that is prepared to be reduced by a reduction furnace, The carbon material is used as the reducing material, and the burning heat of the branch material and one of the heat generated in the furnace are used as the main heat source to melt the bamboo shoots, furnaces, baths, and ultimately the original metal chain melting solution. 2 ^ ^ Heating of the mixture raw materials on the hearth of the above-mentioned preliminary reduction furnace "is set in any one of the following ⑴ ~ (iii) so that the burner flame and at least a part of the mixture raw material layer are above Contact: (0 burner blow nozzle is set under the side of the furnace body, (11) burner blow nozzle is set on the side of the furnace body, and the burner blows The direction of the nozzle is horizontally ^ to 45. The range is inclined to the hearth side. (11 1) The combustion nozzle is set on the top wall in a downward direction. [4 9] A metal chain method, It is characterized by having: ^ V. Description of the invention (23)-A rotary furnace hearth type or horizontally moving 嫱 & 4 or more mixture raw materials selected from the following (a) ~ (C) Step V In a chemical state, (a) at least the carbon material and the metal oxide and the resulting mixture of raw materials, milk emulsion and (b) at least the carbon material and the metal oxide and / or metal hydroxide Eight mixture raw materials obtained by granulation, this δ and a mixture raw material obtained by mixing and forming at least a carbon material with a metal oxide and / or metal hydroxide; and 0 and a mixture raw material to be reduced by this step (A) , Into a melting furnace for metal chains, in which the carbon material is used as the reducing material, and the combustion heat of the two carbon materials and the combustion heat of the carbon monoxide generated in the furnace are used as the main f sources to be melted and finally Step of reduction (B);… in step (A) above, f The Tibetan compound raw material loaded on the hearth of the preliminary reduction furnace is turned and / or moved relative to the hearth during its heating-reduction. Formula shift [50]-A metal chain method, which is characterized by: Equipped with: Rotary hearth type or horizontal moving type preparative furnace for charging one or more mixture materials selected from the following (a) to (c) to perform preliminary reduction ^ Original furnace: "(a) At least carbon material Mixture material obtained by mixing with metal oxide and / or metal hydroxide, °

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(b) at least a mixture of raw materials obtained by pelletizing carbon materials and metal oxides, (c) at least a mixture of raw materials obtained by molding carbon materials and metal oxides; and / or metal hydroxides and / or Metal hydroxide mixing and, ": The raw materials of the mixture to be reduced by the pre-reduction furnace, using carbon material as the sintering material and the carbon monoxide generated in the furnace; The heat source, the metal chain to be melted and finally reduced is provided with the original mixture on the hearth to the hearth, so that it can rotate and / or move

Those who are in the above-mentioned preliminary reduction furnace and are in the process of heating-reduction. # ί ί The above [5 0] metal chain equipment, in which the original steps of the mixture are relatively prepared; ^ 、 processing #, the mechanism for rotating and / or moving the hearth of the furnace, the screw A spiral device with a variable number of revolutions on the square shaft. A metal chain method, characterized in that: it has: one or more mixtures of raw materials in 4 rows (a) to (C) of Rotary Xinzhuang; Turning rich

Qiu ρ, Cha ^ Γ Furnace 'preparation reduction steps in the form of one of the metal oxides and / or metal hydroxides (1) to; small tritium state' (A) Shi Xi, Sun Xi Raw materials of compounds that are mixed with metal oxides and / or metal hydroxides, stalk products / mixed raw materials obtained by mixing stone materials with metal oxides and / or metal hydroxides,

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(:) At least the raw material of the mixture obtained by forming the carbon material with the metal oxide and / or the metal hydrogen; and cut this mouth and a raw material of the mixture to be reduced by the step (A), and install it in the melting furnace. Carbon material * reduced material, which belongs to J material: the heat of combustion and the combustion of one of the carbon oxides in the furnace: the source 'steps for melting and final reduction (B); to ... less ^ steps; High-temperature smelting furnaces produce two to two gases, and hunting takes place using combustion air and / or melting furnaces

The ejector function of the gas is called the heating burner that blows fuel gas into the above-mentioned pre-reduction furnace. [53] A metal chain method, comprising: a mixture of at least one of the raw materials m (a) to (c), in which a pre-reduction furnace is used in a type 2 and a hearth furnace type Or the rotary rich part is in the state of metallization ~ It is one of the emulsified and / or metal hydroxide (a) At least the step (A) of the carbon material disk gold W to be pre-reduced (A): The obtained mixture raw material It is a mixture raw material obtained by mixing oxides and / or metal hydroxides with less carbon materials and metal oxides and / or metal hydroxides and granulating them. &Amp; In the side melting furnace, carbon materials are used as reducing materials. , And 忒

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The combustion heat of carbon material and the heat generated in the furnace—the combustion heat of carbon oxide is the main source of execution, the steps of melting and final reduction "); at least one of the gases generated in the melting furnace in the above step (B) In some cases, after the temperature drops below 80 0 ° C, the dust in the gas is recovered by a high-temperature dust removal device, and then it is supplied to the heating burner of the preliminary reduction furnace as a fuel gas at a high temperature. [54] —Metal The chain-making method is characterized in that: 'A mixture of raw materials selected from one or more of the following (a) to (c) is prepared in a pre-reduction furnace of a rotary hearth type or a horizontal moving hearth type using metal Preparing reduction step in a way that part of the oxide and / or metal hydroxide is in a metallized state (A): " (a) At least the carbon material and metal oxide and / or metal hydroxide Raw materials of mixtures obtained by mixing materials, (b) raw materials of mixtures obtained by mixing and granulating at least carbon materials and metal oxides and / or metal hydroxides, (c) at least of carbon materials and metal oxides and / or Metal hydroxide mix and The raw material of the mixture obtained by forming; and a raw material of the mixture prepared to be reduced in step (A) is charged into a melting furnace for a metal chain. In the melting furnace, a carbon material is used as a reducing material, and the carbon material is used as a reducing material. The combustion heat and the combustion heat of one of the carbon oxides generated in the furnace are the main heat sources, and they are melted and finally reduced in step (B); in the preliminary reduction furnace in the above step (A), a tubular flame burner is set as a heating mechanism, and the above Gas generated in the melting furnace in step (β)

477817

5. Description of the invention (27) A person supplying the above-mentioned tubular flame burner as a fuel gas. [55] The metal chain method of the above-mentioned [54], wherein ^ is supplied to a tubular flame burner of a preliminary reduction furnace after gas dusting occurs in the digestion furnace. [56] The metal chain method of the above [54] or [55], wherein the gas generated by the melting furnace is stored in a gas reservoir, and the gas generated by the melting furnace is supplied to the tubular flame burner of the preliminary reduction furnace from the gas reservoir By. [5 7] A metal chain manufacturing method, comprising: * a mixture of at least two kinds of raw materials selected from the following (a) to (c), in a rotary hearth type and a horizontal moving hearth type; In the pre-furnace of multi-layer hearth furnace type, the step of pre-reduction is performed in such a manner that a part of the metal oxide and / or metal hydroxide reaches the state of gold and metalization (A): ^ (a) A raw material of a mixture obtained by mixing at least a carbon material with a metal oxide and / or a metal hydroxide, (b) a raw material of a mixture obtained by mixing at least a carbon material with a metal oxide and / or a metal hydroxide into pellets, (C) at least a mixture raw material obtained by mixing carbon materials with metal oxides and / or metal hydroxides to form a mixture; and firstly loading the mixture raw materials prepared by the above step (A) to be reduced into a melting furnace for the gold chain, In the melting furnace, the carbon material is used as the reducing material, and the combustion heat of the two carbon materials and the combustion heat of one of the carbon oxides generated in the furnace are the main source, the steps of melting and final reduction "); (A) The above-mentioned mixture charged into the preliminary reduction furnace After heating with a pre-heating gas, it is heated-reduced. *,

477817

[58] The metal chain method of the above [57], which is divided into pre-injury from the side of the raw material loading section. -Then the "heating-reducing belt pre-heating" followed by the "drying belt pre-heating drying", [59] the above [57] or [58] of the gold fever belongs to the original. The body is the gas produced by the melting furnace, the self-propelled method, in which the gas exhausted by the preheating gas or the heating-reduction zone of the _ 2 reduction furnace of such gas. ^ Metal chain method for preheating combustion-supporting oxygen-containing gas, wherein the preheating [60] the gas temperature of any of the above [57] to [59] is 1 0 ~ 4 0 0 ° c 61 · — A metal chain method is characterized in that: ^-a mixture of one or more materials selected from the following U) to (c) is prepared in a rotary hearth type or a horizontal moving hearth type preliminary reduction furnace (A): ~ (a) at least the carbon material and the metal oxide and the metal oxide and A raw material for a mixture obtained by mixing metal hydroxides, (b) a raw material for a mixture obtained by mixing and granulating at least carbon materials with metal oxides and / or metal hydroxides, and (c) at least a carbon material and metals The raw materials of the mixture obtained by mixing and forming oxides and / or metal hydroxides; and a raw material of the mixture prepared to be reduced in this step (A) is put into a melting furnace for metal chains, and in the melting furnace, carbon The material is a reducing material, and the

477817 V. Description of the invention (29) The heat of combustion of carbon materials and the combustion heat of one of the carbon oxides generated in the furnace are the main source of melting and final reduction (6); Gore is in the above step (B), melting When a raw material containing a mixture and / or a carbon material is charged in a furnace bath, the raw material is charged in a second bath surface area of the slag bath portion. [6 2] — A metal chain device for earphones, characterized in that it is equipped with:. ^ A pre-reduction furnace for loading one or more materials selected from the following (a) to (c) for pre-reduction: ° (a) at least the raw material of the mixture of carbon material and metal oxide and / or gold, and (b) the raw material of the mixture obtained by granulating at least the carbon material with metal oxide and / or metal hydroxide With less point m, the carbon material is mixed with the metal oxide and / or metal hydroxide and formed into a mixture of raw materials; the melting furnace for metal chains will be reduced by the above preparations Prepared for reduction by the furnace: Erfa :: Γ 材 为 逛 原 #, and the carbon material's combustion, heat, and furnace end reduction; and the carbon one's combustion heat as the main heat source, it will be dissolved and shipped to the equipment 'The capacity of the raw materials fed from the above-mentioned preliminary reduction furnace is as follows, and the raw material receiving hopper delivered to the above-mentioned melting furnace is provided; and the Shishuqiao furnace has one for receiving the raw materials transported from the above-mentioned preliminary reduction furnace. Or two or more raw materials can be received by rolling the above contents And walking on the track while transferring the capacity; of; Page 35 C: \ 2D-CODE \ 90-02 \ 89118226.ptd " _ 丨 __ 丨 _ 5. Description of the invention (3〇) machine; * Above The coiler's track is set to move. The leader of the coiler is under the ancient tearing machine. This reciprocates and melts in one direction. The side t μ + —the position of the roll on the container where the reduction furnace is placed ... On the calendar side, the above-mentioned raw materials receive the coiler for reeling. Youyuan Chengyou will move the "fni μ, +," β pre-reduction furnace-melting furnace transfer container on the above road. [63] Above [62] Metal chain equipment, i two preparatory reductions, today-temple box supply, TO eight, eight, eight melting furnaces and cores, receiving hopper or raw material receiving hopper group as the center, are located on both sides of it. Τ [64 [62] or [63] above the position of the container roll on the metal furnace side, the cake to be phased—1 is in the middle of the province to be prepared to meet the original. Set up a pair of backup relative to a preliminary reduction furnace [二] ί 3 [Post 62] ~ [64] of the metal chain equipment, wherein the pre: reduction: the raw material feed-out unit can hold a plurality of containers ... there are lending = ^ ί multiple containers The turntable is sequentially moved to the original feed exit position of the pre-injury reduction furnace and the position on the container roll. The turntable is a metal wheel made of Sai [66 >] any of the above-mentioned [62] ~ [65] [67] Any of the above-mentioned [62] to [66], the drive mechanism for rolling up the container with a coiler using a coiler of the metal bath type melting reduction furnace is provided with: The position of the two ends of the take-up track in the length direction and Sa2 are set on the winch wheel Sb on the winding machine, and on the stranded cable 1 C: \ 2D-CDDE \ 90-02 \ 89118226.ptd Page 36 477817 V. Description of the invention (31) Wheel Sc, take up the reel Da with a twisted cable on the container roll which is located at a lower position than the track of the above reel, "" 、 Released from the stranded cable take-up reel Da, is guided to the stranded rope wheels, and the front end is fixed with a stranded cable Wa for a container roll fixed at one end side of the track, from the stranded wheel S ai The above-mentioned stranded cable derived from S or S ^ a is sequentially led to the above-mentioned stranded cable pulley Sb of the coiler, the above-mentioned stranded cable pulley of the container suspension mechanism, and the winding After the above-mentioned winch wheel Sb on the aircraft, by guiding to the above-mentioned winch wheel s% and Sai side, the container suspension mechanism is suspended by the winch cable wa, and the reel Da is wound up by the winch cable by 2 The winding and unwinding of the twisted cable Wa makes the container suspension mechanism ascend and descend. ° ^ [68] The above-mentioned metal chain equipment of [67], further comprising: a twisted cable reel spool for counterweights provided coaxially with the twisted cable reel Da; and a reel Db on the twisted cable The winding direction is reversed with respect to the winding direction of the twisted cable winding drum Da of the above-mentioned twisted cable winding drum Da, and is set by a winch wheel located above the twisted mirror winding drum D a above. The guide strands 纟 匕; and a counterweight c0 installed at the front end of the strand Wb. [6 9] The above-mentioned metal chain equipment of [6 8], wherein the winding wheels Sai & Sa2 provided on both ends of the length direction of the winding machine guideway, and the winding wheels Sb provided on the winding machine, The thinning wheel Sc provided on the container suspension mechanism, the winding drum D a with a twisted cable on the container roll, the winding drum D b with a twisted mirror for the counterweight, the twisting Wa on the container roll, and the winding on the above-mentioned strand A pair of the twisted cable Wb of the cable take-up reel Db and the counterweight Co installed at the front end of the twisted cable Wb are provided.

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V. Description of the invention (32) According to the metal chain method and equipment of the present invention shown in [30] to [69], preliminary reduction treatment or other raw material treatment can be advantageously performed. Therefore, by applying these metal chain methods and equipment appropriately to the above-mentioned metal chain methods [丨] ~ [2 9], a particularly efficient metal chain can be realized. [Detailed description of the invention] " In the following, the details and f forms of the metal chain method and metal chain equipment of the present invention are used as the metal oxide and / or metal lice oxide of the metal chain object, and iron ore is used. As an example, description will be made of a state in which molten iron (powder ore) is preliminarily reduced-melted to produce molten iron. In the present invention and the following descriptions, the metallization rate of metal oxides and / or metal emulsions (referred to as " iron ore " in the following description) is defined as follows. L j Metal hydroxide in metal hydroxide or metal hydroxide ratio (%) = {[metal oxide and / or metal metallized metal amount (kg)] / [metal oxide and / all metal amount (Kg)] X 1 〇 As described above, when molten iron is produced from molten iron ore by molten reduction, RHF is used as a step for preparing the reduction chain and SAF is used as the step for refining the chain (hereinafter, This process is called "RHF-SAF process". In the case of other F, semi-reduced iron (partially metallized iron ore produced by preliminary reduction, the following metallization rate is the same, in terms of energy source units and energy balance. It is advantageous in terms of the level, in contrast, in a process including RHF as a step of preliminary reduction chain θ SRF as a step of refining chain (hereinafter, this process is referred to as " RHF-SRF process " The low level of metallization of half-reduced iron is particularly important in terms of energy consumption and energy balance.

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477817 V. Description of Invention (33) Profits. The latter fact was completely contrary to conventional knowledge, and was discovered first. The present inventor is based on the metal chain method of the first aspect of the present invention, which has a mixture of one or more of the following raw materials (a) to (c) in advance, which are oxides and / or metals In a way that the average metallization reduction of the hydroxide is 5 ~ 55%, the step of preliminary reduction (A1): (a) the mixture obtained by mixing the carbon material with the metal oxide and / or the metal hydroxide until noon People> raw materials, (b) at least carbon materials and metal oxides and / or metal hydroxides and materials and mixtures obtained by granulation, (c) at least carbon materials and gold exhibits and / or metals The raw material of the mixture obtained by mixing and forming the hydroxide; a. The raw material of the mixture prepared to be reduced in this step (A1) is melt-reduced to form a chain in a melting furnace for metal chains of the above (refined chain two reduction and melting) ) Step (B1) to produce molten iron. In the following, the metal chain method according to the first aspect of the present invention will be described by taking the RHF-SRF process as a reduction furnace using RHF and a metal chain melting furnace using SRF. ° First, here is a brief description of the RHF used in the metal chain method of the present invention. FIG. 2 and FIG. 3 are examples of RHF (conventional type RHF), FIG. 2 is a perspective view, and FIG. 3 is a raw material inlet and a raw material feed. An illustration of the plane position of the exit. This RHF furnace body is composed of a ring-shaped rotary hearth 2 and a furnace wall 3 that maintains the atmosphere in the furnace by covering the entire hearth. The rotary bed 2 rotates in the direction of the arrow in the figure. The upper part of the above furnace wall 3 is in C: \ 2D-CODE \ 90-02 \ 89118226.ptd page 39 477817

疋 There are burners for heating in the furnace at intervals (not shown in the whole length of the furnace periphery). The furnace wall 3 is provided with a gas exhaust port 4 in the furnace. There is a raw material inlet 5 on one part of the main body of the Shishu furnace. At the position of the inlet 5 (rotation with the hearth ^ feed outlet 6. From the raw material inlet 5 to 2): there is a raw material inside the drying system. The heating belt and the subsequent reduction belts on the second furnace and the raw material feed mechanism (raw material discharge device) of the original feed inlet 6: For example, it can be made by a spiral device that crosses the rotary hearth 2. The screw device cuts out or cuts out the raw material, and feeds the feed mechanism on the feed outlet 6 side. Move k to raw

^ 枓 Below the feed, there is a conveying belt 7 for carrying the soil after the preliminary reduction. X, instead of this conveyor belt 7, the non-open type container (container) can also be moved below the raw material feed-out port 6, and then transported to SRF, whereby the original 大力 of 大力 can be loaded into the RF of SRF. ， The temperature of the raw materials is reduced and ready for reduction

In this remuneration F, example h, a mixture composed of iron ore and carbon material: (herein below, the case where the raw material of the mixture is pellets is taken as an example), from above and above the inlet 5 of the material, not shown The raw materials are loaded on the German bed 2. The rotary hearth 2 is in the direction of the arrow in the figure (the opposite #needle, in the meantime, the heating burner (burner), etc.) becomes 12,000 to 150,000. [The pellets are heated in a furnace with a warm atmosphere. The pellets are first heated and dried in a heating zone, and then heated by a reduction zone, and the iron ore that accounts for and grains is contained in the pellets. After the carbon material is reduced to the gold cloth, it is fed out of the furnace through the raw material feeding port 6.

5. Description of the Invention (35) In the metal chain method of the present invention, as an example, SRF can be used. (Various types of closed furnaces can be used.) For furnaces, inner entrance = iron bath furnace The main body (through the raw material loading mechanism (for example, the raw material J or the auxiliary slag or iron bath is used to blow oxygen or containing oxygen θ), and the gas blowing mechanism for the furnace gas in the furnace (such as V 二 和It is also blown into the stirring SRF. It is also known as 'bottom blow pipe' etc.) In this SRF, the above dream stone and carbon material are used) and auxiliary materials, 4 =; =: equipment: raw materials (iron ore transmission) Nozzle blows into the wood and iron in the kiln in the place where the name is ^, and the carbon in the molten iron reacts with fish and # w — oxygen, and co gas is generated. This C0 gas system: carbon material 2: oxygen reaction due to insufficiency It becomes C02 gas, and at this time, the most carbon is returned to the 'melting of iron ore in the molten iron', and the disgust in the carbon material is returned to the original, and the molten iron is obtained. So Δ is' in RHF- In the SRF process and the rhf-saf process, the relationship between the average metallization rate of t + reduced iron and the original unit of iron hot water produced by the iron ore. This figure 4 is based on the calculation of the required utilization rate in each process. Electricity is not necessary. 说 The other two systems are temporarily calculated based on electricity. All the electricity systems are based on power generation efficiency. 36〇 / 〇 fossils Calculated from the conversion of fuel. · 1 From the same, it can be seen that in the RHF-SAF process of conventional technology, the average metallization rate of the original iron is set to be higher, which is the overall energy source. The less consumption. This is because in the RHF-SAF process, the energy necessary for the final reduction or dissolution in SAF is supplemented by electricity.

477817 V. Description of Invention (36) Considering the basic materials, energy efficiency will be very low, which is even lower than RHF energy efficiency. In fact, in almost all RHF-SAF processes currently in operation or planned, the average metallization of semi-reduced iron in RHF is set to more than 80%. $ a = For this reason, in the RHF-SRF process premised in the present invention, the metallization rate of the semi-reduced iron manufactured is set to be low, so that the whole system is reduced, and the source = consumption is reduced. This is because, in the RHF-SRF process, the energy required for final smelting or melting in the srf directly uses fossil fuels, which greatly improves the efficiency and is better than the RHF energy efficiency. Therefore, from the viewpoint of thermal efficiency and f, it can be said that in the RHF-SRF process, the average metallization rate of iron will be lowered, and this semi-reduced iron will be the best for the operation and chain (final reduction and melting). . , Qi Jun: This is a method of semi-reduced iron that will be produced by this method: ancient metal 彳 hi _, so, as a conventional technique, attempt to make semi-reduced iron with metallization rate in RHF Occasion: Get resolved. That is, if gn cake-DUP ^ < Chihutai + cocoa is set to be shorter, the residence time in the raw material furnace in RHF is compared with the > technology, the productivity of semi-reduced iron can be: | In RHF, even if there is a-part of the raw material layer or pellets, the mixture has a wide original range, and the allowable range of the thickness of the raw material layer can be calculated as e; 11 f Reduced management standards for pellets, pellets or pellets. Therefore, the use amount of the binder can also be reduced by increasing the "rate increase" of the pellets. J can also be reduced when the metallization rate is low. Furthermore, the heat load of the hearth can be reduced by the large size ... the thickness of the pellets Added page 42 C: \ 2D-OODE \ 90-02 \ 89118226.ptd V. Description of the invention (37) Where the raw material of the compound is a pellet or agglomerate, it is mainly i, metalized Therefore, even on high surfaces, the surface .srp. ,, I ^ of the unmetallized iron ore and the direct interior of the built-in carbon material, therefore, the reaction efficiency and energy efficiency m of the SRF should be carried out, Figure 5 Shown is the winner of the SRF process.

The average metal I-of the semi-reduced iron produced is from the RHF system. In addition, in this furnace, Taichi 1 ^ 埏 水 I is based on the cost of manufacturing water in the off-water manufacturing process of RHITA ^ Vlf_f ~ saf. The index when the cost is "1" means C, and the rate = 90%. Γ: The average metal of the semi-reduced iron produced "and: :: ί Ιί" ㈣_ (SAF ~ SRF) ^ m ^ The mother and child represent the size of the RHF and the melting furnace (LL · · Extra large, L: and The numbers shown together indicate the number of seats they are installed. "I :: Knowing" Compared to the RHF-SAF process, the average metallization rate of Fengfeng's original iron made by rhf is set to a higher level (It should be 90% to reduce the production cost of molten iron by ptp. In RHF-SRF, the average metallization rate of semi-reduced iron produced by RHF is set to a low level to reduce the molten iron. Manufacturing cost. Secondly, the results of the research on the relationship between the average metallization rate of semi-reduced iron manufactured by rhf, the energy balance of the molten iron manufacturing, and the production volume are explained in terms of the RHF-SRF process and RHF-SAF process. As shown in FIG. 6, in the case where the average metallization rate of the semi-reduced iron manufactured by RHF in the RHF-SRF process is 30% (conditions), Energy balance

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For example, FIG. 7 shows an example of the energy balance in the case (Condition 2) where the average metallization ratio of the semi-raw iron produced by rhf in the RHF-SRF process is 90% —for example, as shown in FIG. 8 It is one of the energy balances in the case where the average metallization rate of the semi-raw iron produced by rhf in the RHF_SAF process is 90% (Condition 3). In the process, the pure energy consumption required to produce 1 ton of molten iron (= [ All in energy]-[All recovered energy]), the situation! It is 4 5 (^ & 1, condition 2 is another 5. 6Gcal, and condition 3 is 6. OGcal. From this, it can be known that the average metallization rate of the semi-reduced iron manufactured by RHF_SRF is low. ⑽ = condition 1. Its energy efficiency is the best. Also, the fuel gas supplied to RHF is also in the case 2 and the situation 3 where the average metallization rate of the semi-raw iron manufactured by RHF is set to 90%, and the remaining self-melting Furnace (SRF or SAF) is insufficient to supply the amount of fuel gas (return amount) to RHF, it is necessary to use expensive days ", in contrast, the average metallization ratio of semi-reduced iron manufactured in bulk RHF is set to 3 In the case of 0% working conditions, the amount of fuel gas from the melting furnace (SRF) is sufficient. Figure 9 shows the average reduction rate of the raw materials in R η F and the average semi-reduced metal. The relationship between the conversion rate and the production of RHF (the molten iron equivalent), the production of molten iron in SRp, and the production of molten iron in SAF. The results in Figure 9 show that the total Fe content is used as iron ore (powder ore). Oxide-based ore with a content rate (1 «. Fe) of about 7 to 7 miles, using volatile matter (VM) as a carbon material ) Of about 10 weight, ash content of about 10% by weight, and calorific value of about 7400Kcai / kg, as the fuel gas for RHF, when the recovery gas of the melting furnace is insufficient, natural gas is used, and Mixture raw materials using powder ore and powder

C: \ 2D-CODE \ 90-02 \ 89118226.ptd

477817 V. Description of the invention (39) An example of the case where pellets are mixed-granulated into pellets. In addition, as the equipment regulation, the RHF is based on the premise that the diameter of the largest furnace is about 50 μm and the rotation period is about 8 to 10 minutes. As for the melting furnace, SRF and SAF are based on the current largest scale. For the premise of the furnace, that is, for the SRF system, a furnace having a production capacity of about 2,000 t / day is used, and for the SAF system, a furnace with a transformer capacitance of about 400 kVA is used. Here, if the RHF and melting furnace (SRF or SAF) = number of equipment in the molten iron process is considered to be minimized, and the annual production capacity is 10,000 tons of molten iron production capacity, at the same time as high as possible When the efficiency is reached, the following conclusions can be obtained from the results of FIG. 9. That is, according to the figure /, as the average metallization rate of the semi-reduced iron manufactured by R-HF decreases, although the production volume of rhf increases, the average metallization rate of the semi-reduced iron manufactured by RHF is 20 With a low level of %%, the production capacity of RHF and SRH is approximately equal. The supply of RHF to the SRF is still very low. Roughly the same. Therefore, in the RHF_SAF process, if the metallization rate of Erping 2 is set to the low level as described above, the RHF and SRF materials are equal. The furnace equipment of Zhenzhen guarantees the necessary production volume and can obtain effective iron: =: ： = 卜 ^ In the semi-reduced manufacturing by Liao: in the case where the average metallization rate of thousand is low, and rhf production Quantitative phase ^ 'SAF production is extremely small, relatively ^ seat. necessary. In this RHF-SAF process, the amount of the two primary irons and the semi-reduced iron treatment amount of the SAF are set to =, and the average metallization rate of the semi-reduced iron produced is 9. % Phase II by page 45 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817

The production volume in this case is less than half compared with the case where the average metallization rate of the semi-reduced iron in the RHF_SRF process is as described above, so in order to ensure the same level of production as the RHF_SRF process, rhf and saf It is necessary to install a plurality of units separately. As mentioned above, only when the average metallization rate of semi-reduced iron is reduced to the low level as described above by using the RHF-SRF process, the number of EH? And melting furnace installations can be suppressed to a minimum, which can be achieved. In a typical small factory, it can manufacture the necessary amount (an annual output of 1 million tons). Next, the reasons for limiting the average metallization rate of the semi-reduced iron produced by RHF in the present invention will be explained. As mentioned earlier, from the perspective of the production volume and equipment level of the molten iron process, RHF. -In the SRF process, the optimum value of the average metallization rate of the semi-reduced iron produced by RHF is approximately 20% strong (Figure 9), but the average metallization rate of the semi-reduced iron must also be considered. It depends on factors such as the amount of energy consumed or energy balance in the process. Figure 10 shows the average metallization rate of semi-reduced iron produced by RHF, the amount of gas (energy-converted amount) generated by SRF, and the amount of gas (energy-converted amount) necessary in the next step of the RHF or steel plant. Relationship. In addition, the amount of gas necessary for the next step of the steelmaking plant is calculated with reference to representative examples of conventional ironworks such as Japan or the United States. According to the same figure, if the average metallization rate of semi-reduced iron produced by RHF is about 70% or more, the amount of gas (energy amount) generated by SRF will not be able to meet the necessary amount of gas in RHF ( Energy), have to buy high prices such as natural gas or oil

C: \ 2D-CODE \ 90-02 \ 89ll8226.ptd V. Energy of Invention (41). Therefore, by setting the stop-chemical rate to about 70% or less, the average amount of gas required to supply RHF is about half of the average amount of raw iron that Yoshinobu visits.旎 The amount of gas generated from SRF. However, if the reduction of the unreduced iron oxide of the semi-reduced iron: more than 55% is generated, it will be in the SRF so that the volume of the furnace will be relatively reduced. Respond to ⑶ gas H Luo; In order to avoid this phenomenon, people can promote stirring, but it is not desirable to add gas or powder. In addition, for the "increment of 0mm / increase in the volume, etc.," it means that the amount of iron oxide in the furnace is reduced by the reduction amount (apparently, for 2 1 " 成 之 / Reduced reduction of iron oxide, so if you attempt to increase the rate of miscellaneous surname k2), the second combustion rate of semi-reduced & gold side ^-higher than the thermal efficiency of the person m? The condition that the metal ratio exceeds 55% is not the reason why the average metallization ratio of semi-reduced iron manufactured by RHF needs to be suppressed below 55%. W Ten are metallized husband L. / Fang: The average metallization rate of semi-reduced iron produced by RHF is ΐ: The gas generated by the Ρ = Λ will be used during the rolling process of the iron making plant, from the viewpoint of efficient use of energy or economics. In addition, if the reduction of semi-reduced iron bis = si is reduced, although the productivity of RHF is increased, m is decreased, and there is a problem in two-step production. In addition, if the average metallization rate of the semi-reduced iron is less than 5%, the balance is =

MH'uU Page 47 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 V. Description of the invention (42) There is a problem of increased dust in RHF. In addition, in view of these facts, if we consider the effective use of volatiles in the carbon materials contained in the raw materials or the recovery of zinc in RHF, it is found that the average metallization rate of semi-reduced iron should be more than 5%, more preferably 10 %the above. For the above reasons, in the present invention, the average metallization ratio of the semi-reduced iron produced by a preliminary reduction furnace such as RHF is specified to be 5 to 55%. In the metal chain method of the present invention, one or more kinds of raw materials selected from the mixtures (a) to (c) described earlier are put into a preliminary reduction furnace such as RHF to perform preliminary reduction chain formation. Therefore, as the raw material of the mixture, it can be at least a powder and granular material obtained by directly mixing at least a carbon material and iron ore (metal oxides and / or metal gas oxides other than iron ore will be described later), at least a mixture of carbon material and Either one of a powdery and granular mixture raw material of iron ore is granulated into pellets, and at least a powdery and granular mixture raw material of carbon material and iron ore is mixed to form agglomerates. As the carbon material, in addition to coal, coke, petroleum coke, tar asphalt, plastics, and other carbonaceous materials can be used; and one or two or more of these materials can be used. From the viewpoint of promoting the reduction reaction, it is preferable to use the carbon material having the smallest particle size, and therefore, these carbon materials subjected to pulverization treatment are used as necessary. However, because of the high energy cost of crushing carbon materials such as coal, the amount of powder should be minimized. Therefore, it is appropriate to classify the granular production of the carbon material (mainly coal) used in the molten iron process, use the fine-grained carbon material as the raw material of the above mixture, and use the coarse-grained carbon material as the carbon in the SFR.材 用。 Wood use. By this, the mixture of preliminary reduction

477817 V. Description of the invention (43) ~ In the raw material, a carbon material with a small particle diameter that is better prepared for this purpose can be used. On the other hand, in the SRF, a carbon material with a coarse grain side can be used. Reduces the occurrence of SRF in the form of fine powdered carbon materials that are scattered in the form of dust. The device used to classify the particle size of carbon materials can be a vibratory sieve device, a wind classifier, a flow drying device with a drying and classifying function, or a blade type drying device. In addition, since the generated gas of SRF contains carbon material as its dust, the dust can be recovered from the generated gas, and this dust can be used as a part of the carbon material. In addition to RHF, at least a part of the auxiliary materials to be charged in the SRF (in addition to the entire amount of the auxiliary materials to be charged in the dissolving furnace) may be contained in the RHF. As such a pair of raw materials, limestone, quicklime, dolomite, etc., which are used for adjusting the slag test in SRF can be mentioned. In addition, when the auxiliary raw materials are charged, the ambient temperature of the RJJF (usually 120 to 150 ° C) can be used for the firing of the auxiliary raw materials, so the auxiliary raw materials can be omitted. Special calciner. Also, the by-products may also be a raw material containing a mixture of carbon material and iron ore (that is, at least a portion of the raw material in which the carbon material is mixed with or mixed with the iron ore-granulation or mixing_forming). Or, it can be directly loaded with ARHF without mixing with the above-mentioned mixture of carbonaceous materials and iron ore. In addition, the temperature of the exhaust gas of the preliminary reduction furnace such as RHF is high (900-1300 ° C) and the sulfur content is contained at a higher concentration (when the raw material of the mixture is used as a carbon material to mix coal with coal) 30 of sulfur in coal % Degree is the exhaust gas transferred to RHF) 'but if the auxiliary materials such as limestone or dolomite are charged in the calcined

In combination, CaO and the like contained in the auxiliary raw materials function as a desulfurization background of the exhaust gas of RHF, and the effect of desulfurization of the exhaust gas of RHF can also be obtained. Further, as described in the earlier carbon material, the dust contained in the gas generated by the SRF can be recovered, and this dust can be mixed into the raw material of the mixture. The lower the moisture content of the raw materials of the mixture into the RHF, the better the productivity of the rhf, which can reduce the energy source unit.

Also 疋 = the original compound of the compound (especially pellets or agglomerates) should be preheated and dried. For the reason that the SRF row 1 is dried, if the exhaust gas from RHF is used and the latent heat is increased in one step, the whole process can be integrated Energy efficiency advancement-The raw materials for the reduction chain prepared by RHF, and iron ore-a mixture of semi-reduced iron raw materials, are loaded with "ρ 疋, '= 至-", final reduction and refined for melting purposes. Here, the original mixture of the most prepared reduction by RHF is loaded here: low loading, so 'the raw materials of degree θ that are prepared by w and returned to the original two parties should be contained in a non-opening place ^ Out of ^ dishes-transferred to SRF at a temperature, or, the raw materials from rh ° ^ held above _ C are stored in a gas delivery device and passed through the mixture of rain temperature of gas

Such as nitrogen, Ar, Co2, SRF gas, non-oxidizing gas (for example, more than one selected from the gas, etc. / $ ^ F exhaust gas, etc. in the process of preparation and reduction of the mixture of raw materials. 〇 ~ 1 0 0 0 c SRF, and then put it into the SRF. Also, '== body) will be sent to the non-open container, as long as it can be suppressed

V. Explanation of the invention (45) The reoxidation of the raw material of the mixture and the empty iron ore after the preliminary reduction does not substantially occur, and the closed container of the raw material of the mixture may also have a few toilets. Therefore, it is best It is a tight container. / 、 In this way, the pores or gaps that communicate with the breasts in the world can be prevented by using the prepared return-to-sun container or air delivery device as much as possible. In the following, the energy loss caused by the reduction or reoxidation when J is reduced or re-oxidized =-the bamboo shoots born within the degree < Tong Wu Λ is returned to A material and the combustion heat of the carbon material and the furnace :::: The combustion heat of carbon is the main heat source, which is melted and finally reduced to make molten iron.丁格 鲜 和 取 # To return to the original unit of oxygen or coal of SRF, it is advisable to change gas to fish and burn it. Therefore, the second generation of SRF gas (= (c〇2 + H2) 〇) / (co + c〇2 + H2 + H2〇)) should be more than 20%. The internal burning rate of srh can be controlled in SRF without contact with molten iron or carbon material. Therefore, for example, by appropriately selecting the oxygen in the SRF and sufficiently ensuring the amount of oxygen that does not come into contact with the molten iron or the carbon material in the furnace, a high post-combustion rate can be obtained. On the other hand, the pre-reduced high-temperature mixture raw materials are easy to be re-oxidized, and S2 with high concentration of CD2 or 10 in the generated gas (especially SRF with a secondary combustion rate of the generated gas of more than 20%). In some cases, after being put into the furnace, "the period before reaching the bath surface, due to the contact with the generated gas", a part of it was reoxidized (c0 + Fe4Fe0 + c0, H20 + Fe = Fe0 + H2 ), And become the cause of the deterioration of the original unit of SRF. 477817 V. Description of the invention (46) The degree of reoxidation of the raw materials of the SRF mixture is determined by the concentration of C0, C02, h2, H2G in the gas of srf ', especially called or. Those with high concentrations are susceptible to reoxidation. Therefore, in order to reduce the original unit of oxygen such as SRF or coal, increasing the secondary combustion rate in the furnace and preventing reoxidation of the raw materials charged into the SRF mixture are in the opposite relationship. However, relative to the technique for reducing the mixture of raw materials to high gold as described earlier, the present invention originally reduced the metallization rate after the preliminary reduction, and was lower (average metallization rate 5 ~ 55%). Therefore, ϊ Ί ί IT material fi material input-after reoxidation, its effect is far more than in conventional technology, when the mixture of raw materials (pellets) table household 0 5mm Sheng's gen / \ rate 95 ^, only the diameter of 1 〇111111 70% of the pellets. On the other hand, the present invention reduces the metallization rate from γ: 10% to an average metallization rate of 4 nt. F Example mixture raw materials (pellets) are reduced by 0.5 mm thickness and partly reoxidized. °: Field: Single: make the diameter 1〇 The surface layer of the mm pellets is about 30%, so the metallization rate of the disc is only reduced to a relatively small level. Compared with the first technology, the effect of reoxidation will expose the pellets with a certain reduction after the preliminary reduction test atmosphere is set to the high temperature atmosphere of avoidance + h2 0)). (= (c〇2 + h2〇) " 嶋 2 + h2, the degree of re-oxidation as a preliminary reduction of y /, reoxidation. In this test and 90%, it was exposed to * grains, and it was used In an atmosphere with an average metallization rate of 30% t—at a fixed time, the degree of body oxidation is 0% to 50% and the temperature is W0, as shown in Figure 11. According to this circle: the respective degree of reoxidation. The result M The picture shows that the self-gas oxidation degree is about 20%. C: \ 2D-GODE \ 90-02 \ 89118226.ptd Page 52 V. Description of the invention (47): Flat = reoxidation of grains (reduction of metallization rate) However, its degree is more special: "The rate of 32% of the pellets, the average metallized paste of the pellets belong to the chemical ΐ 2 ^ ^ higher degree, the more obvious the tendency * ° average gold has been found, But its degree is higher than that of V1, although the gas oxidation degree of Λ is about 20%. The pellets with a metallization rate of 90% are much smaller. In the present invention, even in the order ^ ^ # Τ #. tSRF, ^ ^ 2〇% of ⑽ The deterioration of the original unit, the reoxidation of the raw materials of the inhibitors, and the 151 gas generated from the SRF * 'It is the same as the amount of carbon material input into the SRF. The gas = moderately generated gas. It should be mixed with: ϊ ϊ 中材Then, the carbon material is stably supplied to the SRF. Therefore, it is advisable to supply the carbon material (mainly coal) to the SRF in addition to the carbon material in the raw material of the mixture. Therefore, in the RHF-SAF process For SAF, the number of necessary occasions is to use the method of supplying several necessary materials at the same time: the trouble is combined with: J, when considering the stability of the carbon material in the furnace For financial supply, for the area where the final reduction is implemented (set the boundary between molten iron and slag 2 = occasions' carbon material is best from page 53 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 V. Explanation of the invention (48) f. In the case of using the immersion nozzle, the tip of the nozzle of the nozzle tube should be located above the interface between the molten iron and the slag. In addition to the carbon material, a separate carbon material is supplied (in this case In the case of coal), it is particularly preferable to use the following method. As described above, after the pre-reduced high-temperature mixture raw materials are put into the SRF, it is easy to be re-exposed due to the contact with the gas when it reaches the bath surface. In order to suppress such reoxidation as much as possible, it is preferable to put the pre-reduced high-temperature mixture raw material and carbon material into the SRF at the same time, and at least a part of each of the mixed raw material and carbon material (preferably It's all ^ in the state of mixing in the furnace to reach the bath surface. According to this method, the soil of the raw material of the mixture caused by the effect of suppressing the generation of SRF gas is better. The raw material of the mixture that is put into the furnace is covered with carbon material. The formula (2) High temperature mixture of raw materials and carbon materials: In the process, 'due to the sensible heat of the raw materials of the mixture, the material 7) Down = the gasification of the component, so that a volatile gas: coal' :: Jin: The level of direct contact between the raw material and the gas that has occurred, such as raw materials or volatile gases generated from carbon materials as described above, is to reduce the C02 around the mixture to C0, " The degree of re-oxidation of the ingredients and raw materials is reduced. The resulting mixing (4) Even if the raw materials of the mixture are re-oxidized, as mentioned above, the carbon: C: \ 2D-C0DE \ 90-02 \ 89118226.ptd surface 54th Page 477817 V. Description of the invention (49) Volatile gas (its carbon or hydrogen content) is to reduce the reoxidation layer of the raw material of the mixture again. This method is particularly applicable to the situation where the pre-reduced mixture of raw materials is particularly easy to reoxidize. In terms of mixing The raw material is charged into SRF at a temperature of 400 ° C or higher, and the secondary combustion rate of the SRF gas is more than 20% ^, which is particularly effective. Moreover, according to this method, since the carbon material and the raw material of the mixture are in a bath It is loaded in a state close to or in contact with each other, so this carbon material can exhibit the same effect as the residual carbon contained in the raw material of the mixture. As shown in Figures 12 (a) to (d), the raw material of the mixture to be put into SRF An example of a loading method in which the stone and the reverse material are mixed in the furnace in a state where the two are mixed. Among them, FIG. 12 (a) is a single unit formed by the confluence of the raw material loading pipe portion 8a and the carbon material loading pipe portion. The method of loading the tube 8 and charging the mixture raw material and the carbon material, FIG. 12 (b) shows the method of charging the mixture raw material and the carbon material through the parallel raw material charging tube 9A and the carbon material charging tube 9B. 12 (c) is a double tube structure in which the loading tube 10 is formed, and one of the original mixture and the carbon material is passed through the inner tube 丨 〇a, and the inner tube 10a and the outer tube 丨 〇b The method of loading the other one in the flow path is shown in Figure 12 (d). The raw materials are loaded into the tube. A and the carbon material are loaded into the tube 11 B. The method of combining raw materials and carbon materials during the fall in the furnace. Any of these methods can be used. Any method other than the above can be used. Also, the raw materials in SRF (mixture raw materials or mixture raw materials + carbon) Material) (slag bath surface), should avoid the oxidizing atmosphere bath surface area (hereinafter referred to as "oxidizing atmosphere area") formed by the combustion-supporting gas injection or in the slag bath area A bath area that generates an upwelling (hereafter,

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 55 477817 V. Description of the invention (50) Upflow area ") 'and choose the bath surface area that generates downflow in the slag bath (hereinafter referred to as For the "downstream area, '). When the loading position of the raw material is oxidizing, in the surrounding area or upwelling area, the ore reduced to a certain metallization rate in RHF may be reoxidized due to the influence of the surrounding oxidizing atmosphere. In contrast, if the loading position of the raw materials is set in the downflow region, the loaded raw materials will be directly drawn into the downflow of the slag bath and invade the bath, so the reoxidation of the pre-reduced ore can be appropriately prevented The reduction reaction of the residual carbon in the raw material of the mixture in the srf or the raw iron ore caused by the carbon material supplied from other sources can proceed rapidly, which can effectively improve the production f of the srf. And according to this-loading method, the density of the raw materials is larger than that of the bath. Even if the raw materials are the same or a few small, the raw materials will be rolled into the furnace = Erxiayuan! The improvement of the usability, the reoxidation inhibition and reduction: the system has its effect. After loading this material, it is appropriate to appropriately adjust the position of the chute or the loading method β x. The entry here is not limited to the high-level loading of the chute or the like (using the free falling original shake Including self-blow-in nozzles, etc., the tube ?, the surface ... the combustion-supporting oxygen (or oxygen-containing gas), and the downflow region exists in the furnace; the direction from the furnace wall side above, In order to reach the oxygen conditions, the narrowness of the eight areas is determined. Second, the flow r, it is appropriate to load the raw materials (where the bath surface is falling and falling = middle ~, "again in the direction of the furnace diameter The center of the blowing nozzle is separated by more than 丄 ^, preferably 2 m or more, and most preferably 2.5 m or more on the furnace wall side ..

477817 V. Description of the invention (51) In addition, the bottom-blowing official mingling blows gas in Luo (mixing, a ^ a production bucket, 烽 烽 a ninth edition, the milk for compensation) from the bottom team The formula S ^ Into the human gas (and accompanying beans, different, free, and: the expansion angle above, is from the center of the nozzle ;, 〖:,-) this—the expansion angle rises to the slag bath surface (chant # έ @ + Therefore, from the bottom of the furnace, ^ ^ <Tongshu from the bottom of the furnace 2 ~ 3m households seven: j) 'This is the gas expansion area until the furnace bath surface: left and right, machine area. Therefore, the loading position of the raw materials (the drop on the bath surface: 'It should be more than 2m from the bottom of the furnace, and it should be about 3m high: the position of the medium gas expansion area. Avoid the above, and set it in the furnace When the blowing nozzle of the body side wall is blowing into the bath, 6 Gan AX 戽 嗾 AX human + gas or powder from the mouth of the knife or gas, and the angle of the gas or powder spreading from the mouth, is 5 from the center of the nozzle .HHJ towards the expansion of a horse around, and it is believed that upwelling from the nozzle in the area of the furnace diameter of at least 1.5m or so, so the center of the original flat position (drop position on the bath surface) It is better to avoid the nozzle within 1.5m from the nozzle, more preferably within ^, and most preferably in the area of 2 5111. U &lt; Figure 1 3 ~ Figure 15 is the raw material loading in the downflow area The embodiment shown in Fig. 1 is that the self-blowing nozzle 12 is used for blowing oxygen on the bath surface with oxygen (or oxygen-containing gas), and the nozzle is blown from the bottom of the furnace to the bath. The form of iSRF is the bottom blowing gas (usually a stirring gas such as nitrogen). The figure is a schematic diagram of the longitudinal section of the melting furnace, and the figure (b) is along the figure (a) Zhongren-A, a schematic diagram of the cross section of the line. In this type of SRF, the shaded part of the dotted line in figure (b) becomes the downflow area, and the other parts become the oxidizing atmosphere area and the upwelling area. Therefore, in this case, it is advisable to load raw materials into the downflow area of the shaded part of the dotted line in (b).

477817 Fifth, the description of the invention (52) __ Figure 1 4 is from the upper blowing nozzle 12 2 for, and under gas) 'I blow from the side wall of the furnace'. Up-blown combustion, oxygen (or oxygen-containing gas for mixing, etc.) or powder's shape = srf blowing, human gas (usually, a longitudinal sectional schematic diagram, figure (b) is along the figure (~) &quot;, =) is the type of refining: in the SRF, the dashed line in Figure (b) is shaded by the :: part, which becomes the area of the oxidizing atmosphere. Therefore, in this case, it is preferable to load the raw materials into a wide up and down flow area. ^ ~. The injured J5 is blown into the combustion oxygen (or gas: body) from the blowing nozzle 14 on the side wall of the furnace body, and further blows powder into the bath, and from the bottom of the furnace bottom = into the bath Bottom blowing gas (usually nitrogen and other gases in the form of SRF), Figure (a) is a schematic diagram of the vertical section of the furnace, Figure (b) is a schematic diagram of the CC line in Figure (a). In this type of SRF, the shaded part of the graph (dotted line becomes a downflow area, an externalized atmosphere area or an upwelling area. Because &amp;, in this case, the meaning is: (b) the shaded part of the dotted line The raw materials are loaded in the downflow region. Also, according to the above-mentioned SRF (melting furnace) raw material loading mode (that is, the raw material loading mode described by taking FIGS. 1 to 15 as an example), The metal chain method of one form or the metal chain method of the second form of the present invention described later is particularly useful. Specifically, the metal chain method of the first form of the present invention is an iron ore (mixture raw material) in a preliminary reduction furnace. Iron ore) is reduced to a certain low metallization rate (average metallization rate 5 ~ 55%), and then carried out in a melting furnace Melt and final reduction metal chain method; Also, the metal chain method of the second aspect of the present invention is to reduce iron ore (iron ore in the raw material of the mixture).

V. Description of the invention (53) and the unprepared ^ = rate (average metallization rate exceeds 5%), and then this iron ore is an iron ore of-or an iron ore with a low preliminary reduction rate, a metal In the chain method, borrowing = belongs to the chain method. Under such efficient melting and the most iron ore 'under the prevention of its reoxidation, there are open / ί $ ί: t loading form' &amp; can be applied to metals other than the first and second chain method of the present invention The chain-making method, specifically, can be broadly-: a mixture of one or more raw materials selected from the following (a) to (c), in a preliminary reduction furnace, a step of preliminary reduction), and metal oxides and / Or metal oxychloride: (2) at least two (b) to β at least carbon material and metal oxide and / or metal hydroxide mixed and granulated mixture of raw materials, (c) at least carbon A raw material of a mixture obtained by mixing and forming a metal with a metal oxide and / or a metal hydroxide; and a raw material of the mixture to be reduced in step (A), which is charged into a melting furnace for a metal chain, and in the melting furnace, The carbon material is reduced #, and the combustion heat of the carbon material and the combustion heat of carbon monoxide occurring in the furnace are used as the main source of the metal, and the metal chain method of the step (B) of melting and final reduction is used. Therefore, it is also applicable to steps (B) and the like of the metal chain method (I) to (VI). "As the combustion gas (fuel gas) supplied to RHF, it is better to supply the generated gas' to maintain a good energy balance in the molten iron process. In this case, the SRF's generated gas is mainly used as a fuel gas Or fuel oxygen C: \ 2D-CODE \ 90-02 \ 89ll8226.ptd p. 59 477817

A part of the body (that is, auxiliary fuel gas) is supplied to the RHF, and the latter field is used with other fuel gas such as natural gas. In addition, the SRF generation gas is used as a combustion gas for RHF, and has a wounded heat generation volume ', but has a smaller heat generation amount than natural gas and the like. In addition, in order to use this SRF generating gas as a combustion gas for RHF, it is preferable to perform a dust removal treatment (usually also a cleaning treatment). During this dust removal treatment, the temperature of the generated gas does not reach 3 °. 0 ° C, generally lowered to around normal temperature. Therefore, the pre-heated gas system should be preheated to more than 2000, and it should be preheated to 300 C or higher. It is better to preheat to 500 C or higher before supplying to RHF. In addition, the preheating of the SRF generated gas can effectively utilize the energy in the process by using the sensible heat from the exhaust gas and / or the sensible heat of the exhaust gas obtained by the partial combustion of the SRF generated gas. use. In addition, the oxygen-containing gas (air or oxygen-enriched air) for combustion that should be introduced into the RHF should also be preheated (preferably above 200 ° C, more preferably above 300 ° C, most preferably 5) (Above 0 0 ° C) before importing RHF. In addition, the preheating of the oxygen-containing gas for this combustion assisting can also use the sensible heat of the exhaust gas from RHF and / or the sensible heat of the exhaust gas obtained by the partial combustion of the gas generated by SRF, which can convert the energy in the process. Use it effectively. When the sensible heat of the exhaust gas from the RHF is used to preheat the SRF gas (s) or the oxygen-containing gas (〇) for combustion support in a heat exchanger (heater), in order to prevent the exhaust gas from the RHF The corrosive components such as Na, K, C1, and SOx cause corrosion of the heat exchanger to improve the durability of the heat exchanger. Generally, high-temperature gas above 1000 ° C is discharged from the RHF. The gas is cooled so that the above corrosive components will not cause heat exchange

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 60 / ^ 17 V. Description of the invention (55) After the corrosion of the converter is carried out at an appropriate temperature, it is then introduced into the heat exchanger. Be specific. The temperature of the exhaust gas from the exhaust gas when it is introduced into the heat exchanger should be an internal heat exchanger that preheats the above-mentioned SRF to generate fluorine gas (s) or combustion-supporting oxygen-containing gas (〇) to less than 500 (it should be The temperature is less than 45.0. In addition: In terms of the preheating temperature of the gas (s) or oxygen-containing gas (〇) for SRF, from the standpoint of energy efficiency of RHF or the original unit of gas, It should be as high as possible. Therefore, after exhausting from SRF, it becomes the place where the SRF generation gas (s) or combustion-supporting oxygen-containing gas (〇) is not warmed up to 300 ° C. (I) The above-mentioned generated gas (S) and / or the oxygen-containing gas (0) for supporting combustion are preheated in the first heat exchanger using the sensible heat of the exhaust gas from RHF, It is heated up to a temperature of less than 50 ° C (preferably a temperature of more than 2000 ° C, more preferably a temperature of more than 300 ° C). One (ii) and then 'this preheated gas (s ) And / or combustion-supporting oxygen-containing gas (0) 'by using the exhaust gas obtained by burning a part of the above-mentioned generated gas (s) and / or The sensible heat of the exhaust gas obtained from other fuels (such as clean fuel such as natural gas) is preheated in a second heat exchanger, and then further heated (preferably to a temperature above 500 ° C). Here ' In the above step (i), the generated gas (s) and / or the oxygen-containing gas (〇) for combustion support are preheated and the temperature is raised to a temperature of less than 500 ° C. The exhaust gas from RHF is introduced into the first Before the heat exchanger, the first heat exchanger is introduced into the first heat exchanger after cooling to a temperature suitable for the preheating temperature (for example, about 50 ° C). Therefore, the Na, K, and C1

1 C: \ 2D-CODE \ 90-02 \ 89H8226. Ptd P.61 4 // 81

V. Description of the invention (56) The heat exchange write rot # caused by corrosive ingredients such as SOX can improve the durability of the heat exchanger. … The corrosion of the seed can be prevented, but in the above (U) step, or other fuels (such as 夭 妙 # 楚 々 i Λ part of the flower body (3), which does not contain Na, κ ^ Net fuel) Combustion exhaust gas, clean gas of c1, SOx and other detrimental components-the state of the second /, 阿 Awen gas (such as 80 (about rc)) is introduced into the heat exchange, will not produce robbers (s) Or use oxygen-containing gas (0) as a question., a. Problems caused by corrosion of heat exchangers with corrosive components

Obtain: row: i = combustion of fuels other than gas in the step π _ + jealousy: for the preheating heat medium use, as its fuel, it can be used for private natural gas, industrial propane, kerosene, gasoline, etc. Industrial fuel 0 # Based on the above reasons, while ensuring the durability of the heat exchanger, the sensible heat of the exhaust gas from RHL can be used to preheat the SRF gas (s) or oxygen-containing gas (〇) for combustion. The RHF is supplied at a certain temperature (preferably above 50000). ~

In the following, the meaning of using the SRF gas as the combustion gas of rHF in the chain manufacturing method of the present invention will be explained in comparison with conventional technology. Generally, the RHF is composed of the drying-heating zone of the raw material of the mixture and the subsequent reducing zone (see Figure 3). The conventional method is used to reduce the mixture of raw materials to a high metallization rate (over 90%). In order to prevent the reoxidation of the raw materials of the mixture, the concentration or concentration of CO2 in the atmosphere of the reduction zone must be suppressed below a certain level. Therefore, the gas of SRF, especially

477817 V. Description of the invention (57) When the gas with a high secondary combustion rate (ie, the gas with a high concentration of C02 or% 0) is used as a combustion gas for RHF, it is impossible to reduce the mixture raw materials to a sufficient level. Because of the high metallization rate, it is practically impossible to use srf gas as the combustion gas for RHF. In contrast, according to the metal chain method of the present invention, since the metallization rate of the raw material of the mixture after preliminary reduction is set to be low (average metallization rate of 5 kg 5 5 / 〇, even if there is a mixture in the reduction zone) There are several surface layers of the raw materials, and the situation is no problem (as described later, depending on the occasion, but rather, it is expected). Specifically, according to conventional techniques, the raw materials are mixed to the average metallization rate. In 95% of cases, by introducing SRF gas with a higher secondary combustion rate into the reduction zone, such as a 0.5mm thickness portion of the surface layer of pellets with a diameter of 10 yuan, the average metallization rate will be Reduce f by 70%, so 'the high metallization rate intended by conventional technology will be difficult to obtain :: In contrast to this', in the metal chain method of the present invention, when the raw material of the mixture is not recovered and the @I average metallization rate is 40% By introducing the secondary SRF generation gas of the i tn f surface into the reduction zone, for example, even if a 5 mm thickness portion of a pellet having a diameter of 10 mm is re-oxidized, the average metallization rate assurance rate / right can be eliminated. Problematic cost average metal intended by invention In the invention: "Even in the invention, even the gas generated by SRF is a generated gas with a secondary combustion rate of more than 20%, and I use it as a gas. The hole body is used as a fuel for RHF without any problem. In the Γϋκ chain method, 'the surface layer of the raw material particles of the raw material mixture is reduced by rhf to form an oxidation f 枓 reduction' and is mixed in the emulsified layer in advance. Thus, by mixing in RHF, page 63 C: \ 2D-C0DE \ 90 -02 \ 89118226.ptd 477817 V. Description of the invention (58) The surface layer of the raw material of the compound is pre-formed with an oxide layer. During the period from RHF to melting in the srf, the raw material of the mixture will not be oxidized to this extent or more. It can prevent the deduction of energy from rhf caused by the reoxidation of the raw materials of the mixture of RHF. That is, the mixed raw materials that are prepared to be reduced to a certain average metallization rate will be discharged from RHF until the SRF melts. Re-amplification, only the re-oxidation part will cause the energy change required for the reduction of RHF, in vain. In contrast, if an oxide layer is formed on the surface layer of the raw material of the mixture in RHF, and by The particle's internal side is reduced to a certain level The metallization rate is such that the whole raw material particles become a certain (target) average metallization rate. The energy of the mixture required to prevent the re-oxidation of the raw material to the RHF and prevent the reduction of the RHF is wasted. Raw material = SRF melting. 3 In order to form an oxide layer on the surface of the raw material of the mixture in RHF, it is effective to oxidize the gas in the furnace atmosphere at a part or the entire area of the reduction zone of RHF 〇 ((: 02 + 1120 ) / ((: 0 + (: 02 +} 12 + 1120)) is set to more than 30%. Do not mix the raw materials within 1 ?, the higher the concentration of c02 or h20 in the furnace atmosphere is easy to be, Oxidation, by oxidizing a part or all of the atmosphere in the furnace zone of the reduction zone to 30% or more, can easily form an oxide layer on the surface layer of the raw material particles of the mixture. The reduction of the mixture raw materials in the reduction zone occurs from the surface layer side of the raw material particles, and then proceeds to the inside of the particles. However, if the degree of gasification of the atmosphere in the furnace of the reduction zone is high, the surface layer of the raw material particles that have been temporarily reduced is regenerated. Oxidation, so that the surface layer forms an oxide layer. In order to set the gas oxidation degree of the atmosphere in the furnace to 30% or more in a part or the entire area of the reduction zone of RHF, for example, the SRF is used as a combustion gas.

C: \ 2D-OODE \ 90-02 \ 89118226.ptd Page 64 477817 V. Description of the invention (59) When the gas is introduced into RHF, the secondary combustion rate of the gas generated by SRF is improved (secondary combustion is preferred) The rate is above 20%). Although it is advantageous to introduce the generated gas into the reduction zone, it is effective to increase the air ratio of the combustion burner provided in the reduction zone in any case. In the metal chain method of the present invention, an oxide layer can be formed on the surface layer of the raw material of the pre-reduced mixture, because "the average metallization rate of the raw material of the pre-reduced mixture is set low. In contrast, in the case of reducing the raw material of the mixture to a high metallization rate as in conventional techniques, as described earlier, only the surface layer is used to form an extremely thin oxide layer, and the average metallization rate is greatly reduced. Therefore, the fact that an oxide layer is formed Impossible. In the preliminary reduction test furnace, the atmosphere in the reduction zone was changed variously :: Preliminary reduction of the mixture raw material (pellet) was investigated 'and the average metallization ratio was investigated in Fig. 16. In this test, the composition of the raw material pellets, oxygen di-nti: set f: $, the atmosphere in the reduction zone was pulled with gas ice, Pudian 丄 t JI 仏 preliminary reduction pill with a metallization rate of 90% ' And the average metallization rate of the granules with a gas oxidation degree of 30% or more will reduce the production of Beibei reduction pills, which can reduce the preparation of thousands of metallized side: m! Technically, the raw materials of the mixture are reduced to high percent metallized soap. In order to try to suppress the oxidation degree of the f-body (c0 and M concentration) as much as possible, so = = Result: there is a large amount in RHF The formation of unburned gas, this one =, so that the dry-plus belt is also carried ~ ", chaos is that ... it is not expensive, so it must be burned outside the furnace. Page 65 C: \ 2D-OODE \ 90.02 \ 89ll8226.ptd 4 // iU7 V. Invention description (60) For the metal chain method of the present invention, since the degree of gasification in the rhf is set to be high, unburned gas can be set. The production amount is suppressed to a minimum: in this way, the necessary energy amount in the RHF can be saved. Figure 17 is a flowchart of one embodiment of the RHF-SRF process of the present invention. First, the carbon material (generally coal) and iron The mixed ore composed of ore (powder ore) = mixed-granulation, and after pelletizing, prepare the original %% in RHF, as shown by the solid line in the figure, the powder ore 24 Correspondence with coal 25 = pulverization treatment with meal-crushing device 1, 5, 16 and then mixing the two with a mixer (not shown) Then, the pellets are granulated by a granulator and then pelletized. Then, the pellets 26 are loaded into RHF18, and a preliminary reduction chain is produced. In addition, the raw materials (a &amp; generally coal) and iron ore are mixed. The raw material of the mixture composed of stone (powder ore) ^ In the case of granulation, as shown by the dotted line in the figure, the coal 2 5 w is necessary = crushing device 丨 16 After the crushing treatment, the coal M and The powder ore pud 'is mixed ^ 1 9 and then the powdery granular mixture raw material 27 is loaded into the pre-reduction reduction chain. For the above RHF 18 as the fuel gas 28 = to the recovery gas (SRF generation gas) for S, By heating this fuel gas 2 :, the mixture raw material is heated, and the powdered ore 24 is reduced by coal 25 to produce semi-reduced iron 29 with a metallization ratio of 5 to 55 wt%. 9β ^^ RHF 1 8 The raw material of the reduced semi-reduced iron 29 mixture (pellet 26 = = = mixed mixture raw material 27) is loaded into srf20, and is subjected to final reduction and interpretation of the refined chain of tmeda. It is supplied in SRF20. Oxygen 30 and 32, molten iron 31 and recovered gas 32. Also, SRF20, erected in the furnace 2: filling, seed liquid such as water Necessary, but in the constancy operating state, due to the presence of iron Luo, so no such need.

Leaves // 〇〇 /

A part of the receiver 32, as described earlier, is supplied to the RHF 18 as the feed gas 28, and it is used at Ximen 丨; severely reduced, as the combustion gas ^ ^ 0 and the remaining recovered gas 32 is bamboo The M residual gas 32a is consumed by the surface steel mill or rolling plant, surface treatment plant, oxygen-power plant, etc., which are not shown in the figure. The calorific value of the recovered gas 32 is the same as that of natural gas (1 00 ~ 20 0 0 Kcal / Nm3), and because the low temperature is reduced in the heat of the second heat, so it is used as the raw material of the 8th silver 4 | Its .MQ0 ^ ^ A 隹 邗 Feng RHF18's main fuel gas recovery: This system will recover the gas 32 to the heater 21 (heat exchanger) such as

: 之 孰 ▲ i ,,,, and 21 are replaced by the parent of the exhaust gas 33 from RHF18, and the father gas is heated indirectly by the recovered gas 32, and as the other gas = the excess gas 32a is burned, The heat exchange of the exhaust gas H and the recovery gas 32 are indirectly increased. &quot;, eight, = combustion air 3, body 34, which should be supplied to air or oxygen-enriched air, etc., is also apparent in the above-mentioned heat riser 21 by the same as that of _18 to discharge milk 33 It is indirectly heated by heat exchange and is supplied to RHF18. As another method, the excess gas can be combusted and the sensible heat of the eight exhaust gases can be used to heat the oxygen-containing gas for combustion support.

FIG. 18 shows another embodiment in which the recovered gas (SRF generating gas) and the oxygen-containing gas 34 for combustion support are preheated and then supplied to the RHF 182. This embodiment is shaped, medium. . First, the sensible heat of the exhaust gas 33 from the RHF 18 is used to pre-heat the recovered gas 32 and the oxygen-containing gas 34 for combustion in the first-heater 21a (heat exchanger). The exhaust gas 33 ′ from the high-temperature gas from RHF18 is used to cool the device 22 (such as a waste heat recovery pot

477817 V. Description of Invention (62) --- Furnace) Cool to 550. . After the left and right, the first liter heater is introduced ... and the sensible heat of the exhaust gas 33 is used to indirectly heat the recovered gas 32 and the oxygen-containing gas 34 for combustion to a temperature of less than 50 (rc (preferably 200). t: above, preferably above 30 GC). In this way, the recovered gas ^ and the oxygen-containing gas 34 for combustion are further preheated by the heater 21b. This first heater 21b The high-temperature combustion exhaust gas 35 obtained by burning a part of the recovered gas 32 by the burner 23 is introduced, and the recovered gas 32 and the oxygen-containing gas 34 for combustion support are indirectly heated to preferably 50 by using its sensible heat. 〇, and C. In addition, as the combustion exhaust gas that is introduced into the heater 21b and the above-mentioned recovered gas 32 and combustion-supporting, and oxygen gas 34 is used for heat exchange, for example, it can be obtained by burning other fuels (clean fuel) such as natural gas The combustion exhaust gas. As the combustion-supporting gas used in the burner 23, the combustion-supporting oxygen-containing gas 34 preheated by the heater 21a or 21b can be used. In addition, according to this, preheating to the desired temperature ( Should be more than 500t) The exhaust gas 32 (fuel gas 28) and the combustion-supporting oxygen-containing gas 34 are supplied to the other 1-18. According to one embodiment, the exhaust gas 33 from the RHF 18 is cooled before being introduced into the second heat sink 21a. Set 22 to cool to a moderate temperature \ So 'the corrosion of the first heat exchanger 2 丨 a caused by the corrosive components of Na, K, C1, Sjx, etc. contained in the exhaust gas from RHF18 can be prevented' It can improve the durability of the heat booster. In addition, the second heat booster 21 b is introduced; yk recovers a part of the exhaust gas 3 2 (or an exhaust gas derived from a fuel gas that does not contain Na, κ, C1, S0x and other corrosive components are clean gases, so even if they are introduced into the second heat exchanger 211 in a high-temperature gas state (for example, 800 ° C or higher), there will be no corrosive components

Fiber / / 0 丄 /

ϊ ΐ ΐ Ϊ "4 ΐ The problem of 问题 是以" is, ▼ will recover the gas 32 and help magic :: wide body 34 preheat to the desired high temperature state :: 3 ^ Λ ^ ^ ^, i ,,, RHF18 ^ Hope ::; ('The best gas 32 or the oxygen-containing gas 34 for combustion is preheated to the expected ^ = degree (★ It is best to 疋 50 (above rc), and supply it to rhfi8. 石) 上 上 i ^ HF ^ Nine of the gold j chain production method, the mixture of raw materials (iron ore \ &quot; Xun's pre-reduction furnace, pre-reduction to a certain = = average metallization rate (super meaning), and this one Mixing: J material :: ,, iron ore prepared for reduction or iron ore with low reduction rate is loaded into sRF ^ method. According to the metal chain method of the present invention, the average of iron ore loaded into coffee The metallization rate can be in the range of 5 to 55%. Therefore, the following conditions should be used: Conditions: The above-mentioned mixture raw material tray to be reduced, and the original iron ore 4 55% ^ Specifically, according to the metal chain method of the second aspect of the present invention, one is selected from the mixture of one or more of the following (a) ~ (c) raw materials / in rhf, etc. In the preliminary reduction furnace, the preliminary reduction step is performed in such a way that the average metallization rate of iron ore exceeds 5% (A2): (a) s is obtained by mixing carbon materials with metal oxides and / or metal hydroxides Raw materials for mixtures, (b) at least carbon materials and metal oxides and / or metal hydroxides are mixed and granulated, and (c) at least carbon materials and metal oxides and / or metal nitrogen oxides The raw material of the mixture obtained by mixing and forming; and a raw material of the mixture to be reduced by the step (A2), and the iron ore of (i) and / or (ii) below

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 69 477817 V. Description of the invention (64) Stone: (i,) Compared with the raw material of the mixture prepared in the above step (A2), the pre-raw rate is lower Iron ore, (ii) iron ore without preliminary reduction, the two are put into the SRF in a ratio of the total average metallization rate of the iron ore to 5 to 55%, and are melt-reduced (refined chain) = Finally, &lt; Step (B2), the production of molten iron. The iron ore, which is to be decomposed and / or decomposed, can be mixed with the raw materials prepared by RHF preparation and then loaded. The SRF may be charged into the F without being mixed with the raw materials of the mixture to be reduced by W. • In addition, the high-temperature mixture raw materials fed out after the preliminary reduction are mixed with the iron ore from (i) and / or (ii) and then loaded into the SRF, "the high-temperature mixture raw materials fed from RHF and The above (丨) and / or (丨 二 = stone is contained in the non-open container described earlier and then transferred to the SRp. The household will transfer the high temperature mixture raw materials fed from the RHF with the above (丨) and / 戋 $ 疋 ore After being contained in the gas delivery device, it is sent to the SRF from the iron (the gas type is as described above) through the gas delivery pipe, and then loaded into the SRF. ^ Gas In this case, the raw materials of the mixture fed by RHF and the above The iron ore of (1 i) is packed in a non-open type container or gas delivery method. For example, the iron ore can be placed in a non-open type container in advance. Stone, and then accept the high-temperature mixing from RHF ^) and / is to undertake the two in the reverse order, or the two with the same pile ', or a simultaneous approach can make the temperature distribution, material separation, The third is satisfactory. = 化 'Specifically, the advantages of the first form of the metal chain method of the present invention as described earlier and the use of rHF or SRF are borrowed by you and others. W conditions and operating conditions

5. Description of the invention (65) The second method of the invention for forming a metal chain is exactly the same. ^ 1ΪλΪ;! ΚΗΡ ^ Λ-^ t. ^ Y reduction furnace, in addition to RHF, can also use carbon materials fiM q VII, evening floor hearth furnace type, rotary f-type pre-reduction furnace. One of the original and right L H moving hearth type pre-reduction furnaces, this one is also prepared. One (furnace wall) and a horizontally moving hearth 37 located inside it. The moving hearth 36 has approximately the same as the so-called belt-type sintering type sintering machine, that is, the horizontal moving hearth 37 has a transporting hearth 38 which is composed of a plurality of belts: A pair of flywheels 39 &amp; 3GB holding and holding the endless leather hob hearth 38 at both ends and moving it; The upper part of 36 is provided with Z- ", burners 40 (or supply tubes for oxygen-containing gas for secondary combustion) at regular intervals along the length of the furnace body. Direction of furnace body r 2: raw materials are provided on the end side The inlet 41 is provided with raw material shells at the other end, and the furnace gas outlet 43 is provided at one part of the furnace body 36. According to this type of horizontally moving hearth-type preliminary reduction furnace, for example, the mixture is as follows: In the case of pellets, it is explained as an example.) It is loaded from the raw material and above the inlet 41 by a raw material loading device (not shown) into the conveying hearth M ^ While the moving hearth 38 is moving, & It is 1, ~ 150,000. (: In the furnace with high temperature atmosphere, the pellets are heated &quot; = firstly, after drying and heating before transporting the hearth 38, then transfer the hearth 38 477817 V. Invention Explanation (66) The second half is further heated, so that the iron ore constituting the pellets is reduced from the carbon material contained in the pellets to a part of the metallization, and then from the raw material outlet 4 2 to the outside of the furnace. Shown is an example of a rotary f-type preliminary reduction furnace, here in the f-type preliminary reduction furnace The rotary furnace body 44 is rotatably supported by a support 45, and is rotated by a rotary drive device (not shown). One end of the rotary furnace body is provided with a quantitative supply device 46 for raw materials and a gas exhaust port in the furnace. The other side of the rotary furnace body 44 is provided with a raw material feed-out portion 48 and a heating burner w. The furnace wall of the rotary furnace body 44 is provided with a combustion-supporting gas (a plurality of gas supply blowing pipes 5 for oxygen or oxygen-containing supply). And the gas supply head 5 丨, through which the supply 51 and the gas are supplied to the blowing tube 50, and the combustion-supporting gas is supplied into the rotary furnace body ^. The gas supply head 51 and the gas supply blowing tube 50 are connected to the rotary furnace body. It is revolved together with the rotary furnace body 44. Therefore, the combustion-supporting gas is supplied to the gas supply head 51 at the stage of $. Tian Xinhuan 2 Based on this, the rotary rich pre-reduction furnace uses the heating achieved by the heating burner to revolve. The inside of the furnace body 44 becomes 12000 ~ 150,000. It is * == original, and the following will be described below.) The system is heated from one of the granules in the rotary furnace body 44 by the volume supply device 46. Pills After the pellets move inside the rotary furnace body, the radius is further advanced-heating : Tieguangshi is reduced from the carbon material in the pellets to some gold from the raw material feed section 48 on the other side of the rotary furnace body 44 and is fed out of the furnace. In this type of rotary rich type preliminary reduction furnace, Pellets in a rotary furnace

V. Description of the invention (67) The rotation of the converter body 44 is moved relative to the furnace wall ... The pellets are also B. Therefore, compared with RHF, there is a greater concern about the powdering of the pellets. However, due to the pellets' movement as described above, The heated surface is often dislocated, because = f is beneficial in terms of uniform heating and reduction of the pellets. In addition, when the raw material of the mixture is a mixture of iron ore, carbon material, etc., the effect of promotion can be obtained. 21 Figure 21 is an example of a multi-layer hearth furnace type pre-reduction furnace. This pre-reduction furnace has a vertical furnace body 5 2 (furnace wall), a plurality of shed-shaped hearth sections 53 provided inside the furnace body, and A scraping mechanism 54 that scrapes raw materials from the hearth sections 53. In addition, a plurality of heating burners 55 (or supply tubes for an oxygen-containing gas for secondary combustion) are installed on the side of the furnace body 52 between the upper and lower hearth sections 53. The furnace body 52 has a raw material charging inlet 56 and a furnace gas outlet 57 in an upper portion thereof, and a raw material feeding outlet (not shown) in a lower portion thereof. The plurality of hearth sections 53 are provided with a hearth section 5 3 a provided in a flange shape along the inner wall of the furnace body, and a disc-shaped hearth section 53 b disposed at the center of the furnace body alternately in the vertical direction of the furnace body. With the above-mentioned feeding and dropping mechanism 54, the raw materials are sequentially fed and dropped from the upper hearth section to the lower hearth section in order. The above-mentioned picking mechanism 54 includes a main shaft 58 which is arranged to be rotatable in the furnace body 52, a plurality of picking rods 59 extending from the main shaft 58 to the upper part of each hearth section 53, and rotating the main shaft 58 The driving device (not shown) drives the raw material on each hearth part 53 by the rotation of the above-mentioned cutting rod 59. In addition, in the above-mentioned chopping rod 59, a flange-shaped hearth portion 53a is provided along the inner wall of the furnace body, and the falling rod 5 9 is provided. The raw material on the hearth portion 53 is directed toward the heart. unit

C: \ 2D-OODE \ 90-O2 \ 89118226.ptd Page 73 47/817 V. Description of the invention (68): 'The disc-shaped hearth part placed in the center of the furnace body is used with a chopping rod. There is a member that pushes the raw material on the hearth portion 53 toward the inner wall of the furnace. = According to this kind of multi-layer hearth furnace type pre-reduction furnace, the furnace system becomes 120. High-temperature atmosphere of ~ 1 5 00 t: Seven = raw materials (hereinafter, the raw materials of the mixture are above the pellet inlet 56 and are loaded by a raw material loading device not shown in the device loading section to be heated during the movement in the furnace. … J first slivers on the hearth section 53 on the other side; 5 4 a a upwards and a sacrifice, and then on the hearth section 53 on the lower side; ";:; department :: belong to: Into == by the internal shock outside the pellet furnace. Cut metallization, and then feed from the raw material feed outlet to the above-mentioned various pre-reduction furnaces, the occurrence of SRF is = = because there may be a low gas heat value on

This I / ,,, and the use of pure oxygen or high-temperature preheated air, or the use of potential, burner-like combustion stability and high combustion A A pure oxygen can reduce the combustion gas. The concentration of, because: Also, as a melting furnace, as long as it is the burning heat of carbon and the ⑶ plant 舳 or ⑧ ⑧ 2 and the enemy stone that is generated in the furnace; the furnace for solution and final reduction is: Some of them use electric furnaces. For example, it is also possible to separately install carbon material supply equipment and oxygen in or other electric furnaces. Page 74 C: \ 2D-CODE \ 90-02 \ 89118226.ptd

I &amp; YI V. Description of the Invention (69) (or industrial gas), human = device, and the type of furnace that reduces the input power, etc. In $ A Μ 1 儿 明, the metal oxides and / 1 仏 f oxides as the object of smelting reduction are described using iron ore as an example, but as other metal oxides and / or prepared / μ bucket ", It can also be used for Ni ore, Cr ore, and Mn ore temple.

It has been more than two years since the implementation of RHF suitable for the implementation of the metal chain method of the present invention has been described, as well as its operation method. 22 and 23 are suitable for the implementation of the present invention, and FIG. 22 is a perspective view, which is an explanatory diagram of the shield Λ ^ ^ position at the shield. The plane position of the outfitting inlet and the raw material feed-out, the second body 3 is the same as the 'shown in FIG. 2, and the ring-shaped if &amp; covers the entire rotary hearth to maintain the furnace atmosphere. The above-mentioned rotary hearth 2 is made of soil in the direction of the arrow shown in the figure. Please go back to the past and ask the above furnace ^ 3 inside the upper part of the furnace. Show). The furnace wall 3 is provided with a gas exhaust port 4 in the furnace. On this RHF, it is slightly 180 in the circumferential direction. Opposite positions are provided with raw material inlets 5a, 5b, respectively, and a position close to the raw material inlet 5a on one side (a position close to the revolving side of the hearth) is provided with a raw material outlet 6. In addition, the original positions: 5a and 5b are not exactly 180. The opposite position 'is arranged so that the circumference between the raw material inlet 5a and the raw material inlet 5b, the raw material inlet 5b, and the raw material ψ m «=. The positions where the perimeters of the 6 feeding rooms are approximately equal are closed. The raw material feeding mechanism (raw material discharging device) of the raw material feeding port 6 is

/ 81 /

$ 任 思 、 'For example', it is possible to use a revolving device that traverses the rotary hearth 2 'to use the spiral device to cut out or chop raw materials from the raw material layer and transfer them to the raw material feed outlet 6 side feed mechanism . Below the raw material feed-out opening 6, h, a carousel 7 is provided for transporting the raw materials of the mixture that have been pre-reduced and fed out. In addition, instead of this conveyor belt 7, the non-open type transportation container (container) described earlier can also be moved to the raw material feed port 6 = below 'After receiving the mixed raw materials, it is then transported to SRf, thereby' Efforts can be made to prevent the temperature of the raw materials of the mixture from being lowered during the period of loading into the SRF after preliminary reduction. Next, the mixture of Nakanomaru is turned into two layers from the burning state and heated, and the original part is set according to the opening 5a, so the first raw material is not added. For example, the shape of the layer is hereby taking this, the operation method of using the RHF to load the metal figure 22 and an additional hearth as described below, and the case where the mixture raw material is granulated and reduced is taken as an example. The pellets are loaded into the rotary hearth 2 from a raw material loading device on the two raw material loading ports 5a and 5b, and are heated by the combustion. Generally speaking, the pellets on the rotary hearth 2 are packed in a layer or a part of the pellets with a particle size of about 10 to 15 mm. The rotary hearth 2 is in the direction of the arrow (counterclockwise) ^ In this case, the pellets are between 1 200 and 1 50 0. (: high-temperature atmosphere; the iron ore constituting the pellets will be broken by the # inside the pellets. The counter material is also the RHF shown in Fig. 23, slightly in the circumferential direction. 180. The opposite raw materials are loaded into the inlets 5a and 5b, and the bathroom is located at a position close to the revolving side, and a raw material inlet 6 is provided, and the pellets are loaded-reduced-feed out. At first port 5a, the pellets are loaded on the rotary hearth 2.

V. Description of the invention (71) = The entry layer (raw material layer) is filled between the pellets from the second (downstream) raw material n5b, that is, when the rotary hearth 2 is turned to 1/2 week, It is about 4 to 5 minutes and 2 or so. During this period, the pellet system is reduced to a target average metallization rate or an average metallization rate close to it. In this way, the first pellet loading layer is restored, from the second raw material loading inlet 5b, the new pellet loading is again, and here the second pellet loading layer (raw material layer) also reaches the raw material feeding outlet. During the period, that is, until the rotary hearth 2 makes another 1/2 revolution, the direct heat transfer from the furnace atmosphere is heated, so that the pellets are reduced to a target average metallization rate. Then, the first and second pellets are loaded into the household and fed out of the furnace through the raw material feed-out port 6. J24 is another embodiment of the present invention. It is an explanatory diagram of the plane positions of the original entrance and the raw material inlet and outlet. ^ The RHF of the embodiment is divided into three parts in the circumferential direction: the raw material inlets 5a, 5b, and 5c are provided, and a position close to the turning side of a wide m-type furnace is provided. The positions of the raw material inlets 5a, 5b, and 5c are tight and ancient, and are separated by a 'circumference between the raw material inlet 5a and the raw material inlet 5b'. The perimeters of the 6 entrances are respectively Sun Sun Fan # | The tribute knives are arranged in approximately equal positions: Fig. 2 = shows the operation method of ΪΓ 'basically the same as Fig. 22 and _ The first raw material loading port 5a is loaded into the rotary hearth 2 and a pellet loading layer (raw material Layer) is during the period of the rotary hearth 2 'heated by direct heat transfer from the atmosphere in the furnace, = 477817 V. invention description (72) to the average metallization rate or its target. Then, the second and third pellet loading layers, which are imported from the second and third original layers in the upper layer, are also heated by direct heat transfer, and are reduced to the final order. These third pellets Load the layer system outside the furnace. In addition, in the case where the raw material is loaded at four positions in the circumferential direction, the above-mentioned embodiment is used as a reference. In addition, when the pellets are used as a mixture of raw materials, the mixture of raw materials or agglomerates is the same. However, the powdery granular mixture raw material has a small heat transfer mass, and therefore, its metallization rate is lower than that of the pellets or agglomerates in the original phase. In addition, in the operations of the above-mentioned embodiments, the second pellet loading layer (the embodiment of FIG. 23) or the three pellet loading layer (the embodiment of FIG. 24) is different. Metallization rate, strict loading layer &gt; Second pellet loading layer &gt; Third pellet, and the metallization rate of the pellet loading layer is roughly the time of direct heat transfer and heating in the furnace atmosphere The difference in metallization rate will not result in a substantially uniform metallization rate due to the first pellet loading layer or the first pellet loading layer to the third pellet ^. In addition, if the average metallized material inlets 5b and 5c, which are close to granules such as pellets and agglomerates, are compared, the average metallization rate from the standard of the atmosphere in the furnace is sequentially fed out at the raw material inlet 6 In the set RHF, the method of formation and dull operation. The case is taken as an example to explain that when it is a mixture of raw materials, the efficiency is also higher than that of the pellets or pellets, and the first entering layer and the first pellet loading layer are prepared ~ In other words, there is a relationship between the first pellet loading layer. However, the layer of the pellets is from 疋, so the iron ore and the second pellets are different from each other.

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 78 477817 V. Description of the invention (73) '' ^^ ---- When the raw materials of the mixture are mixed, and the raw materials in the form of powder and granules are combined and returned to the furnace The heat transfer coefficient from the atmosphere in the bed on the bed is the former: it is much larger. Therefore, the former is short in order to reduce it to the same metallization rate. Therefore, granules or pellets such as pellets and agglomerates are more productive than powdered and granular raw materials, and as a result, the number of raw materials for RHF is increased. 'But again, when there is a raw material feed port for the raw material feed port of RHF, the raw materials loaded from each raw material port and the residence time in the furnace are different. Strictly speaking, iron ore The metallization rate is not uniform, but as mentioned earlier, the degree is slight, so the raw material ^ export is not a problem even if it is in one location. However, it is also possible to set a raw material feed-out port at a position close to the reverse hearth turning side of each raw material ^. In one case, the metallization rate of the raw materials of the mixture can be made more uniform. In addition, based on the relationship of the feed-out capability of the feed-out mechanism, only one feed-out device (such as the spiral device described earlier) cannot be used for feed-out of the raw material layer. Two I's are located at the position, and a raw material feeding device is set in each. In addition, the gas outlets in the furnace may be separately provided in the respective material inlets, and the number of the gas outlets may be arbitrary. The RHF of the present invention described above can produce semi-reduced iron with a low metallization rate with high productivity. In this regard, it is extremely suitable for the implementation of the metal chain method of the present invention. Therefore, by applying this RHF to the rhf-SRF process of the present invention described earlier, it is possible to effectively realize the high productivity pursued by the molten iron process, reduction of the original unit of energy consumption, and proper energy balance.

477817 V. Description of the invention (74) Generally speaking, in the conventional RHF, it is reported that it is ancient, 1 ^ ^ ^ ^ ^ ^ ^ ^ ^, ^ ^ ^ ^ (1) Although the furnace path of the RHF is large Due to the limitation of the production accuracy, the production capacity of the furnace diameter is about 50m (the largest existing RHF is also to this extent). 'Using the large size of the RHF furnace diameter to improve productivity is limited. * (2) Decreased by increasing the rotational speed of the rotary hearth of the RHF. The metallization rate is' but if the rotational speed of the rotary hearth is increased, then: == = large: Therefore, the friction with the high speed rotation is also significant. The machine loss is significant The increase rate is not practical. Niuquan Qianyuan original iron gold (3) Increases the productivity of the raw material layer thickness of the rotary hearth of the RHF 'However, _ is the Fang Kang type which heats the raw material layer from above' In view of this, if the thickness of the raw material layer is increased, the reduction reaction in the region of 区域 ^ m ^ ^^ m η, "θ" will be significantly slowed down. Therefore, the gold weight of the semi-reduced iron produced is not uniform. In response to these problems, the RHF of the present invention can be used to load the furnace diameter, the rotation of the rotary hearth, and the original The thickness of the material layer is maintained at a conventional level, and semi-reduced iron with a low metallization rate is produced with high productivity. It is self-evident that the above-mentioned RHF can also be applied outside the chain-making method of the present invention. For example, = The semi-reduced iron produced by this RHF is sold as a product, or used as a raw material for other processes (such as SAF, etc. described earlier), and the operation method of RHF in the RHF_SRF process of the present invention is

477817 V. Description of the invention (75) ^ A description of a preferred embodiment. In addition, the operation method of the embodiment described below is not limited to the structure of RHF and can be applied. Therefore, for example, the RHF shown in Figs. 2 and 3 and the RHF shown in Figs. 22 to 24 can be applied. As mentioned earlier, the raw material discharging device (raw material feeding mechanism) used as the raw material feeding port 6 of the RHF can be used arbitrarily. Usually, the raw material layer on the rotary hearth 2 is cut out or cut out by a mechanical machine, and Achieve feedback. Fig. 26 and Fig. 26 are examples of a raw material discharging device provided in a raw material feeding section. This raw material feeding device 60 is provided with a spiral body 61 for raw material extraction, which traverses the rotary hearth 2 upward. The driving device 62 rotates the spiral body 61, cuts the raw material layer A (raw material loading layer), and sends the raw material to the raw material feed port 6. However, when the raw material is fed out by such a mechanical mechanism, the refractory of the rotary hearth 2 may be damaged or worn. Therefore, in order to prevent this phenomenon, as shown in FIG. 26, it is preferable to perform preliminary reduction under the layer a of the powder and granular material that cannot be fed out by the raw material feed-out port 6 on the rotary hearth. This powder layer &amp; may be a mixture of raw materials or other powder particles. By forming the core of the powder and granules that cannot be fed out from the raw material feed-out opening 6, even if the raw material M on the rotary hearth 2 is cut out or spilt out by a mechanical mechanism, it can still effectively suppress the 4 shell damage like a rotary furnace. Or loss. In addition, when the powdery and granular mixture raw material is loaded on the rotary hearth 2 to prepare the raw material, the secondary sintering of the iron ore in the mixture raw material, which is easy to seed iron ore, if the lowermost layer of the raw material layer = the crotch: The feedout will be in trouble. For &amp;, if the powder and granular mixture of raw materials is used, as shown in FIG. 27, the lowermost layer of the raw material layer A should be formed into a layer with a smaller proportion of iron ore than the upper layer (such as carbon or Vice original '

477817 V. Description of the invention (76) The layer with a large proportion of materials). Thereby, the secondary sintering of the lowermost layer portion b of the raw material layer can be prevented, and the raw material can be appropriately fed out. In addition, when uncalcined auxiliary raw materials such as limestone are charged in the raw material layer together with the mixed raw materials and calcined, the carbon material (c0 + c— 2C〇), and there is a problem of reducing the amount of carbon material that can be consumed for preliminary reduction. In order to suppress this problem, when the uncalcined auxiliary raw material that should be fed into the melting furnace is put into RHF, as shown in FIG. A sub-raw material layer or a layer mainly composed of sub-raw materials is formed in the lowermost layer portion c of the raw material layer A, so that the sub-raw materials do not contact the carbon material as much as possible. Therefore, although the unfired auxiliary raw materials can be mixed or mixed with the raw materials of the mixture, granulated, or mixed into shape, but if possible, it is better not to mix with the raw materials of the mixture, but single; == f bed 'in the upper layer The mixture is filled with pellets or agglomerates, and the raw material is mixed, and the raw materials are calcined and the raw materials of the mixture are reduced. &quot; Also, the raw material layer A shown in FIG. 27 or FIG. 28, for example, is formed by _ shown in FIG. 29. That is, on the second turn, iron ore is loaded from the raw material loading port 5d ^ 丨 丨 ^ You, 锊 胤 冰 ζ, or a subsidiary raw material or a subsidiary raw material (in the case of FIG. 27) ' The raw material is loaded into the material (in the case of Fig. 28), and Fig. 29 and Fig. 30 are used as mixed raw materials ::. It is preferably used in the form of granules or shaped bodies; in the form of pellets, briquettes, etc. for raw branches, examples of pellets of the raw materials of the mixture. Here-operation (hereinafter, "pellet" is taken as an example) The granulated object or shaped body of the dream lump branch is first rotated from the raw material inlet 5d to the place where the lamp is ready for reduction. Granules filled with flour ingredients, etc.

V. Description of the invention (77) After object d, move the upper layer of d (powder and granular material) on the rotary hearth. From the side ^, you can get the impact of the above-mentioned loaded particle e during implantation. ^ 2 口 5 = A pellet e. Thereby, the pellets are cracked or powdered. "You," can suppress the breakage of the pellets during implantation. In addition, as a powder, the material (mainly iron ore or coal) is used to make the powder under the condition of heating the powder body that occurs during pelletization. Original: Liter :: The powder raw material has two advantages when maintaining the pellets from the furnace gasification. That is, when the raw material powder is covered with the pellets, it becomes the absolute ε 4 into the rotary hearth. The problem of being blocked by heat. Relative to the material, there are pellets e separated from the pellets by the gas powder raw material in the furnace, and as described in the above method, by using the above method, you can ensure that the pellets e De Er f pellets were charged into the rotary hearth temperature before breaking into the powder. In addition, the powder raw materials were heated due to powder heat /, and the temperature of the liter bed could be maintained lower;: 疋-a kind of thermal insulation material, so the furnace reduced the source Put in the bottom of the furnace = guide Π :: fire = consumption = also an example) day ^ m (the cooling amount is proportional to the fourth power of the absolute temperature-the reason why the hearth temperature is low) The cold s of the fire and fire can also be reduced. 7 ^ Pills-before loading, as the loading d on the rotary hearth 2 (powder edges can be powder raw materials such as iron Powder materials such as stone, coal, etc.) or powder materials that should be put into the auxiliary materials of the melting furnace (such as limestone, quicklime, dolomite, etc.), one or more of them can be used. Moreover, such powder particles can also be used. The main body of the raw material or auxiliary raw material powder (that is, the material other than the powdery raw material or auxiliary raw material contains a part of page 83 C: \ 2D-CODE \ 90-02 \ 89118226.ptd V. The description of the invention (78)) In addition, as the above-mentioned Pei entry, (mainly iron ore or coal powder, the powder raw materials used during pelletization are kept low, and, The powder raw material basin is as described above, so the temperature of the hearth can be kept low, and the internal water content: "" and it is more likely to occur than the water content in the pellets. Therefore, ^ °, the rapid expansion caused by ( Burst) not right or left). The raw material of acetone powder (for example, 3 ~ 10% moisture content), other than coal in the pellets (the coal that is necessary for internal inflammation talk-part of the grain), if it will be for all or all occasions This welding practice is used by Sun Ziwang, a part of the above-mentioned loading d, as a part of the above-mentioned load d, because L and the coal diameter are voluntarily / entered; Wen Zhi The oxygen-coal raw unit of the state SRF. Compared with the occasion of entering SRF, the composition can be reduced as the raw material gas in the RHF; the fuel gas used for volatile removal from the coal ^ please consume, so 'This can also save, as the loading d, by using the auxiliary raw materials of the J J secondary melting furnace), 2 without the auxiliary raw material calcination equipment, which can reduce the equipment into winter. The distance from the loading position of d (the raw material loading inlet 5d) to the pellet 6 and the loading position (the raw material loading inlet 5a) in the circumferential direction of the rotary furnace should be within 30. The rotation angle of bed 2 should be within 30. This is because the distance to the right exceeds 30 by the rotation angle of the rotary hearth 2. In the case, the effective hearth area of the RHF will be reduced, which will reduce productivity, and it will also cause self-grief due to the heat of the hearth. The volatile gas generated by the carbon material in d cannot fully benefit 477817 477817

V. Explanation of the invention (79) The particle size (mesh size) of the powdery raw material or auxiliary raw material loaded on the rotary hearth 2 is preferably 0.05 to 10 mm, and more preferably 0 to 8 mm. When the particle size is less than 0.05, the amount of dust generated during loading or in the RHF furnace will increase. On the other hand, when the square exceeds 10 mm, the risk of bursting is increased due to heating from the hearth, and its effect as a cushioning material is also reduced '. In the case of the "other" powder and granules of auxiliary materials, the general burning rate is reduced. In this operation mode, even if the pellets are not subjected to a pre-drying treatment (drying treatment after granulation), since the pellet 4 is used, the sharpness of the pellets from the hearth immediately after implantation can be prevented. Heating 'prevents the pellets from bursting due to the moisture content in the pellets. Therefore, the undried pellets e containing about 3 to 10% of water can be charged into the upper layer of the load 4. Figure 31 and Figure 32 show an example of other operation modes. The basin system will load the raw material from the raw material feed-out port 6 before loading it from the raw material; the mouth is filled with the raw material of the cooling material e, etc. By a raw material discharge device 6 provided at the raw material feed-out port 6. The processed raw materials (finished products) in the mixed state of the cooling material e are fed out of the furnace. As mentioned earlier, the raw material feed section as the raw material discharge device 60 is a mechanical mechanism such as a lunar screw device. If this mechanical mechanism is used to increase the temperature 2, it is usually installed near the raw material feed section. crack. Therefore, the temperature is reduced to ~ 2G (rc or so before the raw materials are processed (finished product: not only causes cooling water: waste, but also becomes = Bi = two "as opposed to this" by the same method as above, by using Construct,

477817 V. Description of the invention (80) The cooling material e is mixed with the processed raw material and fed out, which can not only properly cool and process the raw material without using cooling water, but also prevent the raw material discharge device 6 0 In addition, since the cooling material e which is in heat exchange with the processed raw material is also loaded into the SRF, the heat loss of the raw material (finished product) can also be prevented. However, according to this method, the cooling material is put into the SRF in an unreduced state. Therefore, if the amount of the cooling material is too large, the original unit of the SRF will deteriorate, which is a problem. Therefore, the cooling material loaded on the raw material layer A The weight ratio (A) of the Fe content (A) in the e to the Fe layer (B) in the raw material constituting the raw material layer A is preferably 1/10 to 1/1. The weight ratio to (A) / (B) is less than 1/10, the cooling effect of the processed raw material is insufficient, on the other hand, if it exceeds 丨 / i, the in situ position of Behr SRF will deteriorate. As the cooling material, for example, one or more selected from the group consisting of a powdery and granular mixture raw material, iron ore, auxiliary raw materials (for example, limestone, quicklime, white stone, etc.) to be charged into a melting furnace, and charcoal materials (coal, etc.) can be used. x, pellets or agglomerated raw materials which are less effective than other materials in cold upsetting and can be used at a higher price. ^ The various operation modes of the RHF described above are particularly important in the metal chain method of the first and second aspects of the present invention. Specifically, the hair metal chain method of the present state: the metal chain method of melting and final reduction by a melting furnace after the first (.. °) ;: 乂 invention of the metal chain method of the second form, The iron ore that belongs to ΓΛ is reduced to a certain metallization rate (average gold W is more than 5%).

477817 Description of the Five Inventions ⑻) &quot; &quot; &quot; &quot; Or iron ore with a low pre-reduction rate is melted in such a way that the whole becomes a certain low metallization rate (average metal pi metallization rate 5 ~ 55%) Furnace, and then the metal chain method of melting and final reduction. In these metal chain methods, by using the above operation mode of RHF, productivity can be effectively improved. The above-mentioned various operation forms of RHF can be widely applied to the metal chain method of the first and second embodiments of the present invention, that is, they can be widely applied to denier:-'selected from the following (a) ~ More than one kind of mixture raw material plant pre-reduction furnace, the step of pre-reduction (: mixture raw material obtained by mixing with iron ^, at least carbon: pellet mixture raw material, (C) at least carbon by ^ borrow H The obtained mixture raw material; &amp; one will be the mixture raw material prepared in this step (A) ^ prepared into the metal made of one oxygen two !: reducing material, and the carbon material combustion heat and the furnace (VD Step # M This can also be applied to the metal chain method (I) ~: V step 4. Especially in the above operation mode, the following records ", + in the first and second forms of the present invention It can be very useful in the Noble metal # method. The open cup is a metal chain method other than the chain method. (1) The bed-type reduction furnace is used in two parts in the circumferential direction. The rotary furnace at the inlet is charged with the mixture in sequence. Original feed means upstream side skirts into the inlet of the preliminary mixing raw materials further second party; direct heating furnace around now, the mixture is carried out

C: \ 2D-CODE \ 90-Q2 \ 89118226.ptd Page 87 477817

Here comes 2) the method of preparing milk at the lowermost layer of the raw material layer on the rotary hearth of the preliminary reduction furnace. The bottom layer of the material layer of the raw material of this compound is fed into the bottom, and the formed layer, or the auxiliary material is (4) in the method of (3) above, and the original material should be loaded into the melting furnace. The method of forming the main layer of the auxiliary material.

(5) On the rotary hearth of the preliminary reduction furnace, load the raw materials from powder and granular materials (one or more materials selected from the mixture of raw materials, iron ore, and carbon materials) and / or the auxiliary raw materials that should be loaded into the melting furnace The structured load, or the load mainly consisting of the powdery and granular raw materials and / or the auxiliary raw materials and powders, is located 'on the downstream side of the rotary hearth moving direction, on the upper layer of the load, A method of adding granules and / or formed bodies of raw materials to a mixture. (6) In the method described in (5) above, a method of setting the particle size of the material charged in the rotary hearth to 0.05 to 10 mm. (In the method described in (5) above, a method of setting the powdery granular material charged on the rotary hearth 'to coal or a coal-based material is used.

(8) In the method of the above (5), a method in which the powdery granular material charged into the rotary hearth 'is set as an uncalcined auxiliary raw material or an object mainly composed of an uncalcined auxiliary raw material. (9) In the method of the above (5), the granulated material and / or the shape of the mixture raw material charged on the upper layer of the rotary hearth is set to

C: \ 2D-CODE \ 90-02 \ 89ll8226.ptd Page 88 477817 V. Description of the invention (83) A method for granulating and / or forming a body by drying beforehand. The third aspect of the metal chain manufacturing method of the present invention is to prepare a mixture of one or more of the following raw materials selected from the following (a) to (c) in a preliminary reduction furnace, and prepare a portion of the iron ore for reduction to metallization. Pre-reduction method of the state ... (a) at least the raw material of the mixture obtained by mixing the carbon material and the iron ore, (b) at least the raw material of the mixture obtained by mixing and granulating the carbon material with the iron ore, (c ) At least a raw material of a mixture obtained by mixing and forming a carbon material with iron ore; and loading the pre-reduced raw material of the mixture into a melting furnace for a metal chain, in which the carbon material is used as a reducing material The main heat source is the heat of combustion of the carbon material and the heat of combustion of the carbon monoxide = one of the carbon oxides generated. It is used for melting and final treatment. Among them, the high-temperature exhaust gas discharged from the preliminary reduction furnace is effectively used. The desulfurization of gas is caused by the above-mentioned dissolving furnace, and the pre-burned metal is made from the raw material of the South temperature exhaust gas discharged from the Yunyuan furnace. It is prepared, and more than one or two or more are prepared. Reduction furnace 1: a part of the exhaust gas until the metallization, by connecting it with the high temperature auxiliary raw materials discharged from the original furnace, and this Chang ;; j belongs to the 1 chain decomposition furnace &amp; not calcined It is like a mixture prepared for reduction in the original furnace; the combustion heat generated by the prepared material and the furnace is used to reduce the heat of combustion and the burning heat of the raw material for the carbon source, Mainly used in metallurgical furnaces for bathing and extraction and winter migration of metal chains.

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V. Description of the invention (84) As mentioned earlier, the exhaust gas temperature in the preliminary reduction furnace such as RHF has a temperature of the exhaust gas (900 ~ 1300 °), and the sulfur content is relatively high. Therefore, by using this Exhaust gas is introduced into appropriate furnaces (such as rotary rich furnaces, rotary hearth furnaces, suspended preheater-type rich furnaces, shaft calciners, fluidized bed furnaces, etc.) to make them compatible with limestone or dolomite, etc. Contact with the unfired auxiliary raw material, the auxiliary raw material can be calcined, and CaO etc. contained in the auxiliary raw material

Since it functions as a desulfurizing agent for the exhaust gas, the effect of desulfurizing the exhaust gas can be obtained. f + X

Also, because the exhaust gas discharged from the general furnace is still at a high temperature, the sensible heat of the exhaust gas can be used to heat the air in the heat exchanger, and the preheated air is supplied to the RHF and other preliminary reductions as combustion air and the like. In the furnace. As the calcining furnace for introducing the exhaust gas of the preliminary reduction furnace for the calcination of the auxiliary raw materials, for example, a rotary f-type furnace such as a direct heating method (a method for bringing the heating gas into contact with the object to be heated) can be used, but it is not limited thereto.

What is not shown in FIG. 33 is an embodiment when a rotary animal furnace using a direct heating method is used as a calcining furnace, in which the uncalcined auxiliary raw materials and the exhaust gas of the preliminary reduction furnace (RHF in this example) are introduced. In the rotary rich furnace, the sensible heat of the exhaust gas is used, and the auxiliary materials are fired, and the exhaust gas is desulfurized by Ca0 and the like contained in the auxiliary materials. The calcined auxiliary raw materials are fed into a melting furnace such as SRF. On the other hand, the exhaust gas system that is discharged from the rotary rich is dusted by a cyclone, and the air is heated in a heat exchanger with bean paste, and then filtered through a bag. The machine is discharged outside the system. The preheated air heated by the heat exchanger is supplied to the preliminary reduction furnace as combustion air or the like. In this third embodiment of the present invention, the air chain method is prepared by a preliminary reduction furnace.

477817

The metallization rate of the produced semi-reduced iron is not the same as that of the first form of the metal chain method, and it is reduced with the present (iron ore in the raw material of the mixture): = = metal ore After the rate is 5 ~ 55%), then in the melting furnace-the metallization rate (on average, it can also be the same as the second form of the present invention ~ the original, (iron ore in the raw material of the mixture) is reduced to 1 ^ j to iron ore The petrification rate is 5 ~ 55%), and the iron ore with a low reduction rate of the preliminary reduction rate of this iron ore toilet cat version / thousands and ten jun Meng will be made into a total of one-= average metallization rate 5 ~ 5 w Equipped with A 2 / of low metallization "flat reduction. By setting the metallization rate of the semi-reduced iron to 1 仃 仃 'and Li Zhong Sang-You Jiren ® made H, + mountain ϋ into the first and second aspects of the present invention. The conditions of the special case of the sacred sect of Zhanning Zhankai and Jindian Haide are stipulated in the First Form of the Metal Chain Law, using the specifics described earlier, according to this metal ": =: Gengliang's metal system chain.

遥 I 遥 AI β 1 V ·, +. It is a RHF that is prepared to be reduced by using iron ore with an average metallization rate to become a certain range as described above. 工 # ^ ^ ^ ^ MU The local temperature exhaust gas from the preliminary reduction furnace is brought into contact with the uncalcined auxiliary raw materials that should be put into the melting furnace, and it is also necessary for the auxiliary raw materials to be burned. In response to the problem, Luo μμ BOX Ao Jie &gt; From &amp; The same, the dish exhaust gas to pre-air…, this pre-heating second rolling as a combustion empty 褒 reduction furnace. ^ ,,, and gas supplies are specially prepared for RHF, etc. For this reason, as the original furnace, the uncalcined furnace pre-loaded into the melting furnace, and the metal chain equipment are equipped with the reduction furnace previously provided. The discharged high-temperature firing auxiliary raw material is brought into contact with the melting furnace. The preparation of RHF and the like also exhausts the gas to make it calcined with the corresponding auxiliary raw materials. As the third form of the present invention, the green form is made of Phoebe, soil &amp;

477817 V. Description of the invention (86) The furnace is a kind of preliminary reduction furnace that can use various forms of RHF, horizontal moving hearth type, multi-layer hearth type, rotary rich method, etc. as described earlier. In addition, as the melting furnace, as long as the carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat of the carbon monoxide = the main heat source for melting and final reduction are not limited to SRF Therefore, it can also be a type of furnace that uses electricity as part of the source. For example, it is also possible to use a type of furnace that reduces the input power by separately installing a carbon material supply device and an oxygen (or air) blowing device in a SAF or other electric furnace. In addition, the metal oxides and / or metal hydroxides to be smelted and reduced may include, in addition to iron ore, ore, Cr ore, M ore, and the like. [RHF operation example] The arrangement of the raw material inlet is shown in Fig. 23, Fig. 24, and Fig. 3. The rhf preparation is used to test the production of semi-reduced iron from iron ore. The results are related to the loading state of the raw materials of the mixture, the composition of the RHF used, the rotation speed of the RHF, and the semi-reduced iron.

The metallization rates are shown in Tables 1 and 2 together. In addition, the semi-reduced productivity is based on the conversion value of total iron content (T0tal) in the manufactured semi-reduced iron product. In the table, the reference value of the raw D of "operation example 3" using the conventional type RHF is set. &quot; 1 &quot;, expressing that productivity as a productivity index. "For the items in Table 1 Operation example 1 Operation example 2 Operation example 3 Raw material loading form 'Nine grains Nine grains Nine grains 1 Number of raw material inlets ~ 2 3 1 Number of raw material inlets 1 1 1

477817

V. Description of the invention (87) Speed index _ ϊProductivity indexϊ

Table 2 Project operation example 4 Operation example 6 Raw material loading shape Raw material loading inlet number 2 / | VJ 1— ^ / 1 1 Raw material feeding outlet number 1 1 ------ 1 Speed index 0.2 0.2 0.2 Average metallization rate (%) 55 10 90 Productivity index 1.0 1.6 0.7 As the RHF system, a test furnace with a furnace diameter of 5 m was used. In addition, as a mixture raw material (powder ore + coal), two kinds of raw materials of pellets and powdery granular mixtures are used. The rotation speed of the rotary hearth is expressed by an index, and when using pellets, it is 0.7 ~ 1 ( About 30 minutes to 12 minutes per week), when using powdery and granular mixture raw materials, "0 · 2Π (about 60 minutes per week). Regarding fine ore and coal, the same brand is used for each operation. &quot; 1 The raw material of the mixture is prepared in the following manner. First, the pellets are pulverized by a pulverizing device to a particle size of about 40 // m by using a pulverizing device; ^ granular ore and coal are pulverized by the pulverizing device into powdery and granular coal having a diameter substantially the same as that of the powder ore. Using a granulator to mix-granulate to obtain a coarse and powdery, powdery and granular mixture of raw materials, the raw materials of the sintered raw material, stone, and an average particle size of 0.2 mm ~ 0.4 mm, and crushed to Q iron ore, spoon 3mm

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Page 477817

V. Description of the invention (88) The powdery granular coal with the particle size below is mixed with the mixer to form the powdery granular raw material. In addition, the blending amount of coal in the raw material of the mixture is appropriately set in a range of about 20 to 40% (weight ratio) relative to the amount of ore. In addition, the temperature of the atmosphere in the furnace of the RHF is adjusted in a range of 300 to 140 ° C. The average metallization rate of the semi-reduced iron is adjusted according to the atmosphere temperature in the furnace, the ore-carbon material mix ratio, the hearth speed, and the thickness of the raw material loading layer.

In operation examples 1 to 6, operation examples 1 and 4 are examples using RHF shown in FIG. 23 (RHF having raw material inlets 5a and 5b at two positions in the circumferential direction); operation examples 2 and 5 use RHF shown in FIG. (RHF with raw material inlets 5a_, 5b, and 5c at three locations in the circumferential direction); Examples 3 and 6 are examples using RHF (only rjjF with raw material inlet 5) shown in FIG. 3. From Tables 1 and 2, it can be seen that by using RHF · which has raw material inlets at two or more locations in the circumferential direction, it is possible to produce semi-reduced iron with a low average metallization ratio and high productivity. β [Example]

The chemical conversion rate t is semi-reduced iron (all pellets), and its operating condition f productivity 4 is converted into an actual machine (RHF actual machine with a furnace diameter of 50 m), and ί: the semi-reduced iron Melting conditions (SRF, SAF) of the refining chain of the combined operating conditions, various original units, energy consumption and energy

The configuration using the raw material inlet is shown in Figure 23 (RHF with raw material inlets 5a and 5b at two positions in the circumferential direction) and the RHFs type furnace (furnace diameter) shown in Figure 3 (RHF with only raw material inlet 5). 5m), according to the method in the above operation example, the raw material of the mixture (coal + fine ore) is pre-reduced to produce C: \ 2D-CODE \ 90-02 \ 89118226.ptd

477817

balance. The results are shown in Table 3. In the example of the present invention, RHF of the type shown in Fig. 23 is used, and in the comparative example, rhf of the type shown in Fig. 3 is used. The ambient temperature in the furnace of each RHF is appropriately adjusted within a range of 1300 to 1500 ° C. The RHF (hearth) speed index and productivity index in Table 3 are based on the RHF (hearth) speed and productivity when the average metallization rate is 90% by weight of semi-reduced iron (&quot; factory) Value.

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 95 477817 V. Description of the invention (90) Table 3 Ι1ϋ · Ι1ΙΙ C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Remarks for her base ifeiml iuilu = ①— （② + ③） = ①— （② + ③ + ④） Comparative Example 3 SRF — 〇 m Os CN 220 500 m 1680 〇Inch 1230 4100 1100 § 〇 Comparative Example 2 SRF-gm ON — § 〇f— &lt; 1050 500 -1000 5600 1100 -2100 〇 Comparative Example 1 SAF — sm On — 470 Ο 1 〇1050 1540 -2490 6000 1100 -3590 〇 Example 3 of the present invention SRF r4 o 〇rn (N Ο i〇 (N 460 1550 〇 cn 1070 4200 1100 〇rn 〇 Example 2 of the present invention SRF (N (N Ο m 380 290 1300 〇m 400 600 4500 1100 -500 〇 Example 1 of the present invention SRF O inch · 1 370 280 240 1 610 δ r〇4800 1100- 1080 〇 Type of melting furnace RHF speed index RHF average metallization rate (%) RHF reduction rate (%) RHF productivity index (kg / hot metal ton) (kg / hot metal ton) (Nm3 / hot metal ton) (Meal / Molten iron ton) (Meal / molten iron ton) (Meal / molten iron ton) (Meal / molten iron ton) (Meal / molten iron ton) (Meal / molten iron ton) (Meal / molten iron ton) (Meal / Hot metal ton) RHF necessary Raw coal melting furnace necessary coal melting furnace necessary oxygen melting furnace recovery gas ① RHF fuel original unit ② RHF, auxiliary energy of melting furnace ③ Excessive energy quantity of molten iron production molten iron pure energy consumption consumption ④ energy consumption Excess energy quantity of iron plant, lost energy quantity, p. 96, 477817, invention description (91) In Table 3, 'Comparative Example 1 is an example of a case where a semi-reduced iron having an average metallization rate of 90% by weight is used to refine a chain by SAF. This Here, the final reduction in SAF is carried out with the residual carbon contained in the semi-reduced iron, and the heat necessary for the reaction and the dissolution of the molten iron_slag is input through the electrode through electricity. In addition, the Saf gas generation system Recovered as recovered gas and supplied to RHF as part of fuel. In addition, the alkalinity of the slag in the SAF (= Ca〇 / Si〇〇 system is usually adjusted to about 1 to 3, and for this alkalinity adjustment, a quantity of quicklime or lightly burned dolomite 'system is supplied together with semi-reduced iron. s AF, this assumption is also made in this example. Comparative Example 2 is an example of a case where the chain is refined by SRF with an average metallization rate of 90% by weight. 'Comparative Example 3 is an average metallization rate of 0% by weight. % (Preliminary reduction rate of 33%), the second example of the case where the chain is refined by SRF, and the examples 1 to 3 of the present invention are based on the average metallization rate of 0 to 55% by weight of semi-reduced iron by SRF An example of a refining chain. Here, the final reduction in SRF is performed by the coal supplied to the SRF in addition to the residual carbon in the semi-reduced iron, and the heat necessary for the reaction and the melting of molten iron and slag It is given by oxygen combustion of one of the carbon oxides or coal that occurred in the above-mentioned reduction reaction. The SRF generation gas (heat generation ~ i800Kcai / Nm3) is recovered as a recovery gas and supplied to the RHF as a fuel gas. , Excess recovery gas system as auxiliary of RHF or SRF Source or secondary steps (steel rolling-surface treatment equipment, etc.) necessary energy utilization. In addition, the limestone or dolomite calcination necessary for the alkalinity adjustment of the slag is based on the full calcination of RHF for the production of semi-reduced iron. The necessary amount of quicklime or light-burned dolomite is adjusted to 81 ^ with the raw materials.

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd P.97 477817 V. Description of the invention (92) As mentioned above, the above-mentioned examples of the present invention and comparative examples are all half of the raw materials fed by RHF. Pellets) are transferred to a melting furnace in a state of being stored in a closed container in order to prevent the temperature from decreasing and reoxidation. From Table%, it can be seen from the viewpoint of pure energy consumption of molten iron (RHF and melting furnace) that Comparative Example 1 and Examples 1 to 3 of the present invention can be found. Relative RfJF-Process Comparative Example 1 is 6 Gcal / t, this invention! ~ 3 are 4.8Gcal / t, 4-5Gcal / t, and 4.2Gcal / t, respectively, and the energy efficiency is very high.

On the other hand, when the average metallization rate was reduced to 0% as in Comparative Example 3, "Although the amount of energy consumed will be further reduced, the excess gas will be generated in many places, so the system up to the next step is included. The ironworks as a whole will not be able to handle it, and there is no doubt that it will cause energy loss of 130Mcal / t. Second, this part of the energy loss will be included in the molten iron energy for consideration, but the molten iron energy consumption will instead Will increase. Also, even in the rhf-⑽ process, the average metallization rate of semi-reduced iron is increased to 90% by weight as wide as ΪΪ: 2, and the pure energy consumption of water and water will deteriorate to 5.6. (Jcal / t. "From the point of view of Lt:?, The average metallization rate of semi-reduced iron has occurred in the overall view of ironmaking.

均 金属 # 率 逼 # &; 幻 Fantasy rolling body. On the other hand, in the case of the second genus of the semi-reduced iron / Comparative Example 2 where the scope of the present invention is high, it is necessary to use natural gas or the like when the necessary fuel is insufficient. Price-fixed ^ 1 = average metallization rate of reduced iron. This is set for iron made from broken stone "to water / burst: the energy needed is roughly balanced. W Iron will sell it as cast iron or slag for ironmakers. 98th Page C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 V. Description of the invention (93) Plant 'ideal and bounded energy balance. When the metal chain method of the above form is actually implemented, the original mixture of the original mixture is reduced. 'There are several problems as follows. (1) The problem of reducing the iron ore that becomes the raw material. (2) The problem is caused by the productivity of the heating method of the heating burner. (3) The problem is caused by the raw material charging layer. Productivity problems with uneven temperature distribution. (4) Questions about the combustion gas of the heating burner used in the preliminary reduction furnace, and the use of the exhaust gas discharged from the SRF. (5) Installation in the preliminary reduction furnace. The problem of bursting of the raw materials of the mixture. The metal chain methods (I) to (VI) of the present invention described below include means for advantageously solving these problems. Hereafter, the metal chain method of the present invention is hereby described. (I) ~ (VI), the object of metal chain Metal oxides and / or metal hydroxides (powder ore) will be described as an example of the preparation of molten iron by pre-reduction-thin melting reduction. A %% of water and metal chain method (I) -In general, the sintering of raw material ore (particle size 10m as it is in a pre-reduction furnace such as MF, and the originality of the ore is not good. There will be problems with the two. On the other hand, the raw material ore, fish, It must be costly, and it is not practical. The particle size is less than 0.88. Compared with coarse-grained raw material ore (pellets are difficult to use. In addition, it is difficult to crush the sintered raw material ore into a pellet shape, which is customary. In technology, the binding agent is not practical.

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 99 477817

V. Description of the invention (94) The amount of use is increased, and there are problems in workability or yield. However, it is believed that the sintering raw material ore is formed into agglomerates, etc., which is believed to be one or two = land formation means. However, as mentioned above, the sintered raw material ore is not well reduced because it is used as a carbon material and compared with pellets and molded products based on sintered raw materials. There is a great difference in the reduction speed in y. Don't use a sintered raw material-based molded body. Only one and a half to two thirds of the reduction speed can be obtained, which is a problem. ^ In response to these problems, the metal chain method of the present invention (0, when sintered raw ore is used as the raw material ore, the reduction property of the ore during the preliminary reduction can be improved.) Through this, metal oxides such as iron ore can be sought In order to reduce the cost of the metal hydroxide smelting reduction chain and improve productivity, the present inventors have formed a sintering raw material ore and further based on this knowledge and problems. The granulation material or shaped body's decomposing and reducing ability was further studied. As a result, it was found that the sintering raw material ore was only crushed to a proper particle size at one time and mixed with the carbon material for preliminary reduction (that is, 'the ore and carbon were not The material is granulated with a binder or formed into pellets for preliminary reduction.) The reduction rate can be greatly increased, and a reduction rate-productivity similar to or similar to conventional pellets can be obtained. Productivity can also be achieved. When the ore is crushed into an appropriate particle size at one time, and it is mixed with carbon materials to be granulated or formed into pellets or agglomerates, even if the ore that is more commonly used as coarse grains is used, it can still be obtained and used. The reduction rate of the pellets at the same level or close to it is productive. The metal chain method (I) of the present invention is completed based on such knowledge, and has:

477817 V. Description of the invention (95) First, one or more mixtures of raw materials selected from the following (a, / N, Va) ~ (c), which are in the back, back, and under flat moving hearth type, multi-layer hearth furnace Type or rotary rich type pre-reduction furnace, in a way that a part of iron ore is in a metalized state, and the step of pre-reduction (A): (a) at least the carbon material is mixed with the iron ore The obtained raw materials of the composition are (b) at least a mixture of carbon materials and iron ore, and granulated materials, and (f) at least a mixture of carbon materials and iron ore, and formed by mixing; and The raw material of the mixture prepared to be reduced in this step (A) is charged into a melting furnace for a metal chain. In the melting furnace, a carbon material is used as a reducing material, and one of the combustion heat of the carbon material and the occurrence in the furnace is used. The combustion heat of carbonization is the main heat source, and the step (B) of melting and final reduction is used; as the iron ore in the raw material of the above mixture, the ore obtained by using primary ore as the main body and obtained by primary crushing is used. The particle size of the ore after welding and primary crushing should preferably be 0.1 to 1 mm. According to this, the metal chain method (1) of the present invention uses a sintered stone-based mixture of raw materials to obtain the same recovery speed and productivity as the pellets. Dry X, which is similar to the following Detailed description of the metal chain method (丨) of the invention The metal chain method (I) of the present invention is charged into a preliminary reduction furnace; the mixed two raw materials are one or more of the following raw materials of ⑷ ~ (C). Mouth material (a) at least carbon material and iron ore are obtained by mixing raw materials (b) at least carbon material and iron ore are mixed and granulated and mixed (C) at least carbon material = ore are mixed and formed The original mixture of this mixture is prepared in a rotary hearth type, a horizontal moving hearth original hearth layer hearth type, or a rotary rich type pre-reduction, and iron ore is:

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 101 Stone V. Description of the invention (%) Erzhiping = metallization rate (preferably 5 ~ 55%) After preliminary reduction, put it into In the melting furnace for metal smelting, such as iron and / or combined smelting reduction furnace (SRF), the carbon material is used as the reducing material in this $ solution furnace, and the combustion heat of the carbon material and the furnace-f carbon monoxide are generated. The heat of combustion is the main heat source for the refining and final reduction of iron ore. This = In the metal chain method (j), the iron ore used as the raw material of the above mixture ☆ 糸 It is best to use the ore which is mainly composed of the sintering raw material ore for sintering. It is best to use a single crushing to reduce the particle size ο.1 ~ lmm Fan Gu's sintered raw ore. Suitable for the use of iron ore in the raw material of the mixture-secondary crushing into the raw material ore according to π: 2, and the reason why the reduction speed can be greatly improved. According to my heart, hunting by sintering the raw material ore will increase the specific surface area. The fine-grained originality of Pan # ^ skin broken was significantly improved. ? It ’s important to make sure that after the crushing of the sintered raw material ore, however, this will result in an increase in the cost of crushing. The difference is that the size of the original ore or the value of the grain size 2 depends on the stone. The necessary energy for crushing or crushing strength are also different, so it is necessary to find the optimal value with ore. Generally not ^, so, according to the particle size (screening particle size: sieve mesh 0.1mm or more, right crushed to 0.1 ~ lmra can not cause a significant increase in the cost of crushing particle size), Table 4 and Figure The 34 series stated that the fouling of the raw materials would be counterproductive. When the raw material mixed with the carbon material is loaded into r to be crushed once, and it is prepared to be reduced, the particle size of the sintering raw material ore 4 in the preliminary reduction furnace, and the crushing C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 102

477817 V. Description of the invention (97) From this, it can be judged that if the granularity of the relationship between the broken cost index and the reduced index is in the range of 0.1 to 1 mm, the overall cost can be reduced to the minimum. Therefore, the particle size of the sintered raw ore in the present invention after the primary crushing is preferably set in the range of 0.1 to 1 mm. Table 4 Particle size 10 5 7 2.5 1 0.5 0.3 0.2 0.1 0.075 0.045 Crushing cost index 0 10 22 27 35 40 56 65 100 Reducibility index 60 66 72 76 86 88 90 94 96 100 Comprehensive cost index 115 106 98 86 82 81 83 88 92 100

* 1 Representative particle size In the above-mentioned metal chain method (I) of the present invention, the method is a method for pre-reduction by mixing the ore obtained from the primary crushing and sintering of the raw material ore with a carbon material. Advantages of equipment such as granulator and briquetting machine. On the other hand, when the sintered raw ore is crushed once and the ore and carbon material are formed into pellets or agglomerates, the temperature is reduced and reduced in the pre-reduction furnace in a state where the ore powder and the carbon material are in close contact, so #It has the advantage that the reduction speed can be increased. / As the RHF used in the metal chain method (I) of the present invention, the RHF shown in Figs. 2 and 3 or the RHF shown in Figs. 22, 23, and 24 can be used. The basic structure or function of these RHF is the same as the metal in the first form of the present invention.

477817

The method described in the chain-making method is one of a preliminary hearth type and a multi-layer hearth. The horizontal metal moving chain preparation method of various pre-reduction furnaces has the same B · metal chain method (Π). Therefore, these original furnaces are multi-furnace or rotary f-type hearth furnaces and multi-layers except for RHF. Since the structure and function of the furnace are the same as those of the explainer, the description is omitted here. B. Any of the hearth type and rotary rich type in the pre-reduction furnace can be used for horizontal movement.

: The RHF towel 'furnace load is not heated by the burner flame, but = the radiant heat transfer from the upper high-temperature gas or the south conduction from the increased hearth of the i-degree heating. Therefore, due to the heat transfer speed, The productivity of each product is determined, and it is difficult to improve productivity. In response to this problem, the metal chain method (π) of the present invention can be used to prepare for reduction and production of the &lt; production process &quot; by a certain iron ore # metal field: material and / or metal hydroxide In order to reduce the cost and improve the production of the smelting reduction chain, the inventors have focused on the above-mentioned conventional RHF problems. The inventors focused on the case where iron and valley-type smelting reduction furnaces are charged with pre-reduced ore to produce molten iron. In terms of energy balance, to set the reduced iron to a low metallization rate is better than five people = this point, get: Mouth (1) by using the direct heating of the burner flame to load the raw materials to be reduced Material heating, according to the radiant flame radiated from the burner flame, and the convective heat transfer promotion effect brought by the generation of high-temperature combustion gas, can greatly increase the productivity per unit of hearth area. (2) Where this heating method is used, the reduction of the burner flame

477817 V. Description of the invention (99) There must be a tendency for the nitriding flame to be oxidized around the flame. Therefore, if the surface of the heated material is closed, it will become a very unfavorable condition: The above-mentioned preparation of iron ore at a low metallization rate cannot be applied, but if there is no problem. At noon, the original metal chain method meets the original: 并 mi the metal chain method of the present invention "). = Or horizontally moving hearth-type pre-reduction rotary hearth ... just mixed with iron stone 丄 ⑴:, ( a) The mixture obtained by mixing and granulating the slave material and iron ore; mixing the iron ore and forming the mixture =: (") At least the furnace, in the refining furnace, using carbon The heat of combustion of dissolved carbon-carbon oxide used for the metal chain is A: I = step of final reduction; when the mixing power is heated in the preliminary reduction furnace, the flame of the burner and the mixture of raw materials are heated. Above the layer ^ a part of the contacts. According to the metal chain method (π) of the present invention, the thermal efficiency of the reduction furnace can be prepared, thereby greatly improving the preliminary reduction suitable for implementing such a metal chain method (n) The metal chain equipment of the present invention comprises: a rotary hearth type or a horizontal moving bed type preparation C for loading one or more mixture materials selected from the following (a) to (c) to perform preliminary reduction: 2D-CODE \ 90-02 \ 89118226.ptd Page 105 477817 V. Description of the invention (100) Reduction furnace: (a) At least # 44 * β / γ. \ 2Τ I only mixed raw materials obtained by mixing iron ore '(b) at least carbon materials and iron ore are sequentially paid (C) at least carbon materials and iron ore are: 'And the raw material of the composite obtained by pre-/// W from the preliminary reduction furnace; raw material, and the broken material; = the original mixture ㈣' with carbon material as the main heat source, and A burner of carbon monoxide that has occurred; a heating burner for melting heat charged into the above-mentioned pre- and final reduction of the metal chain; the raw materials of the mixture on the hearth and the hearth are set to make it burn (1) ~ (lii) At least one part of the burner blow nozzle which is in contact with the upper layer of the raw material layer of the mixture is arranged at the lower part of the side wall of the furnace body, and the direction of the mouth is from water 2 == side wall 'And the burner blower tube (^) burns, and the burner blower nozzle is set down on the top wall. Chain making-Prepare 2 ft Ming metal chain method (η) and a metal gas suitable for its implementation. . The bangs are also explained in detail. The metal chain method (jjl + raw materials of the present invention is one of the following (a) ~ (:): mixing into the preliminary reduction furnace) U) υ, π π U k) more than one of the raw materials of the mixture. U to y is a mixture of slave material and iron ore (b) at least the carbon material is honed to the original; bucket (0 at least 浐The raw materials of the mixture obtained from the Γ line and the wide bar are granulated. This mixture is obtained by mixing and forming the ore. It is prepared in a 床 bed type or a horizontal moving hearth type. Way to prepare reduction '= = metallization rate (preferably 5 to 55%) reduce its m-type smelting reduction reduction furnace C: \ 2D-CODE \ 90-02 \ 89118226.ptd page 106

477817 V. Description of the invention (101) (SRF) and other metal melting furnaces. In this melting furnace, the carbon material is used as the reducing material, and the combustion heat of the carbon material and an oxidation furnace generated in the furnace are used. " The combustion heat is the main heat source for melting and final reduction. Conversely, in this metal chain method (Π), when the mixture is heated in the preliminary reducer, it is used to make at least-part of the mixture above the raw material layer. The flame of the burner (combustion burner) is in contact with it. Here, the heating flame; j flame refers to the part of the gas that emits light by the combustion reaction. = In the diffusion flame, the outer side generates an oxidizing flame and the inner side Shoulder: Another kind of heat transfer using the radiant flame of the flame, the general phase of Xiao: The combustion heat can be transmitted to the object to be heated at a relatively high efficiency.… In comparison, the following is used as a preliminary reduction furnace Description of the embodiment of the invention of the metal chain method (π) in the case of using RHF. How to use this as RHF can use the RHF shown in 2 ^ 2 "shown in Fig. 2 and Fig. 3. The basic structure or mechanism of these RHFs: 圏 3J The first form of the metal chain method of the present invention :, detailed descriptions are omitted here. π has phases. Therefore, in the preliminary reduction operation using such RHF, at least a part of the flame of the device and the raw material of the mixture is in contact with the moon to add heat to the raw material of the combustion material. In this way, you can use this as a blender. 埶 Take this as a mixing method ..., in this way, use the direct addition of the burner flame ..., according to the convective heat transfer promotion effect of the combustion gas from the flame of the burner flame. ]: And generate high-temperature property insurance. However, according to this method, the surface of the burner flame and hot material tends to be oxidized, because in the reduction, the occasion where the high metallization rate is the target, and the reason: page 107 C: \ 2D-GODE \ 90 -02 \ 89118226.ptd 477817

The use of questions. In other words, it is a method which is only possible in the present invention with a low metallization rate in the reduction of RHF. In addition, the metal chain equipment of the present invention has an arrangement structure suitable for the heating burner in the reduction furnace of the method described above, and a heating burner for heating the mixture raw materials charged on the hearth of the original furnace, and the following d) ~ (Iii) Any one of the forms is provided so that at least a part of the upper surface of the raw material layer of the burner flame and toilet mixture is in contact with: (i) the burner blowing nozzle is provided at the lower part of the side wall of the furnace body, and (ii) the combustion The blower nozzle is provided on the side wall of the furnace body, and the burner blow nozzle is oriented from horizontal to downward 45. The range is inclined to the hearth side, and (i i i) the burner blowing nozzle is arranged on the top wall in a downward direction. Fig. 35 is a sectional view in the furnace diameter direction of the burner mounting portion of the RHF according to an embodiment of the present invention. Heating burner 63, the blowing nozzle 64 of which is located below the side wall of the furnace body, and the angle of the blowing nozzle of the burner relative to the f air nozzle of the hearth surface is set to a level ranging from 4 to 4 downward to make the combustion flame A part of f is in contact with at least a part of the upper surface of the raw material loading layer A, and in particular, the reducing flame is brought into contact with the raw material loading. If the angle of the combustion blower nozzle is upward, the burner flame f will not be able to contact the raw material loading layer A, and if the angle from the horizontal downward exceeds 45, the raw material with a partial hearth The material layer A is heated. What is not shown in Fig. 36 is another embodiment of the present invention. The heating burner 63 is provided on the top wall of the furnace body j in a downward direction. When the burner blowing nozzle 64 is set on the top wall of the furnace body, if the distance between the blowing nozzle and the hearth is too large,

C: \ 2D-OODE \ 90-02 \ 89118226.ptd Page 108 V. Description of the invention (103) The flame will not reach the burden ^: 2.5 of the hearth ^ "(^ '^ this, then the blower of the burner The mouth 64 should be provided from the top), so as to make ^ ^ f.〇m, and more preferably ^ contact the upper surface of the material layer A with the flame 5 stably with the raw material on the hearth for combustion by the burner Where 々_ 上 "~ 〇, in the range. It should be in the range of = ~ h3, more preferably, the burning speed will increase in the region with high adiabatic flame temperature, 'a flame which is effective in the promotion of heat will directly contact', so in the convection department tf: hearth Part of the heat load is not too large, it should be in the hearth: two :: materials! Carbon materials or auxiliary materials other than materials, or their mixture # Γ, by using the method and equipment of the present invention, carbon materials Add 埶 J i ΐ ί :: ΐ · Divides the originating gas or the fuel in the decomposition gas into :: p &gt; w 丨 combustion, and the heat of combustion can be transmitted to the raw material into the plant! ^ 卜 a ', from heating The combustion gas # 1 of the burner, if the secondary combustion, the second gas team is near the raw material load or the direct contact of the combustion flame: ί ί; ϊ Γ. 0, H2 is ignited with air for secondary combustion, which can radiate: "Heating of raw materials. Therefore, the thermal efficiency of the furnace can be further ^ ° Figure 37 shows this state, used outside the burner body 65 ^ Extrapolation-heating the burner core of the air supply pipe 66 for the secondary combustion, order one person. The supply of combustion & working gas. If this secondary combustion air is preheated to about 300 ~ 60 0 C, the effect will be It will be even more remarkable: As shown in the embodiments of Figs. 35 and 37, when the heating burner 6 3, 6 3a is recognized on the side wall of the furnace body 1, the flame length of the heating burner should be

477817 V. Description of the invention (104) At least 1/3 to 1/2 of the width of the hearth in a direction at right angles to the direction of movement of the hearth, more preferably about 70 to 80% of the width of the hearth length. Of course, in this case, the radiant heat transfer effect due to the combustion in the upper gas space can also be obtained as usual. In addition, in order to make the flame energy uniform and contact with respect to the raw material load in the hearth width direction, as shown in FIG. 38 (plan view), the hearth width direction can be divided into a plurality of regions 2ai ~ 2aa. The contents are contacted by the flame f of the different heating burner 63. In this case, as shown in FIG. 38, each krypton burner 63 may be provided only on one side portion of the furnace wall, or may be provided on both side portions 3a, Hit the top wall. In the metal chain method (Π) of the present invention, as a preliminary reduction other than RHF, Harbin can use the mobile flat hearth type. The preparation of the flat flat hearth type also has the same function as the previous one. The description of the first form of the metal chain method of the invention is, therefore, the description is omitted here. C. Metal chain method (dish) Figure 2 and Figure 3: The type of RHF shown is through the furnace wall. The heating and combustion benefits (combustion burners) set on the side and other parts are used to add raw material and character layers. The raw material layer is mainly heated by the heat transmitted from the upper part of the M from the hearth part. However, When such benefits = furnace i: radiant heat transfer or heat transfer from the M bed part when heating the raw material loading layer, due to the 埶 transmission of the raw material loading layer, ^ mr: becomes a decisive factor, Therefore, even in order to increase the heat input of self-heating burners and the like, the polar layer of the raw material charging layer is shaped. Chengnan; Xian ’, but the temperature distribution in the raw material layer

477817

V. Description of the invention (105) The large unevenness makes it difficult to raise the temperature level evenly. In view of these problems, the metal chain method (i) of the present invention minimizes the unevenness of the temperature distribution of the raw materials into the material layer as much as possible, and can obtain the effect of increasing the production volume by increasing the input and source. Therefore, the cost reduction and productivity improvement of the smelting reduction chain of gold = oxide and / or metal hydroxide such as iron ore can be achieved.

Specifically, the metal chain method (Π) of the present invention includes: a preliminary reduction of a mixture of one or more of the following raw materials selected from (a) to (C) in a rotary hearth type thin horizontal moving hearth type In the furnace, a part of the iron ore is ^ = metalized, and the preliminary reduction step is performed (A) ·· (a) at least; the raw material of the mixture obtained by mixing the anti-stone with the iron ore, (B) at least a raw material of a mixture obtained by mixing and granulating a carbon material with iron crushed stone, (c) at least a raw material of a mixture obtained by mixing and forming a carbon material with iron ore; and &gt; The raw material of the mixture to be reduced is loaded into the metal chain for melting in the melting furnace. The carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat in the furnace = one of the carbon oxide combustion heat is used as the main heat source. The melting step ^ is the most original step (B); in the above step (A), the mixture of raw materials loaded on the hearth of the reduction wall is heated and reduced, and the phase hearth is rotated and / or Mover. Metal chain method according to the present invention

(m), can eliminate the uneven temperature distribution in the raw material charging layer, and improve the productivity of the furnace. ^ In addition, the metal chain equipment suitable for the implementation of the metal chain method (π) is provided with: Rotary hearth type or horizontal mobile type preliminary reduction

477817 V. Description of the invention (106) Furnace: (a) at least raw material obtained by mixing carbon material and iron ore, (i) at least raw material obtained by mixing and granulating carbon material with iron ore, ( c) at least a mixed raw material obtained by mixing and forming a carbon material with iron ore; and a mixed raw material to be reduced by the preliminary reduction furnace, using the carbon material as a reducing material, and using the combustion heat of the carbon material and the furnace The combustion heat of one of the carbon oxides is the main heat source, and it is a metal chain equipment for melting and final reduction. In the above-mentioned preliminary reduction furnace, there is a raw material for mixing the mixture on the hearth. During its heating-reduction, compared with the hearth, The person who made it turn and / or move. The following is a detailed description of the metal chain method (dish) of the present invention. In the metal chain method (π) of the present invention, the raw materials of the mixture charged into the preliminary reduction furnace are raw materials of one or more of the following (a) to (c). (a) at least a raw material of a mixture obtained by mixing a carbon material and iron ore (b) at least a raw material of a mixture obtained by mixing and granulating a carbon material with iron ore (c) at least a mixture of carbon material and iron ore and Formed mixture of raw materials. This mixed raw material is prepared in a rotary hearth type or a horizontal moving hearth type. Also: In the original furnace, iron ore becomes a certain average metallization rate (preferably 5 ~ 5 5 / 〇 after preliminary reduction, it is charged into an iron bath type melting reduction furnace (saf), etc.) In the melting furnace, the carbon material is used as the reducing material in this melting furnace, and the combustion heat of the carbon material and the combustion heat of carbon monoxide generated in the furnace are the main sources for melting and final reduction of iron ore. ^丄 In the metal chain method (), the above-mentioned mixture raw materials loaded in a state of being laminated on a bed of a preliminary reduction furnace are heated in the furnace—reduction

V. Description of the invention (107) On the way, it is to be rotated and / or moved relative to the hearth, thereby achieving uniformity of the temperature distribution and the uniformity of the preliminary reduction rate in the layer of the mixture raw material. In the following, a case where RHF is used as a preliminary reduction furnace is described as an example to explain the embodiment of the metal chain method (melon) of the present invention. As the RHF system, the RHF shown in FIGS. 2 and 3 or the RHF shown in FIGS. 22 and 23 and 24 t can be used. The basic structure or function of these RHFs is as described earlier in the description of the metal chain method according to the first embodiment of the present invention. Therefore, detailed descriptions are omitted here. Fig. 40 shows an embodiment when the present invention is applied to RHF, and a 2-table rotary B bed. In this embodiment, baffles 67a to 67c are provided at three locations in the furnace diameter direction for the raw material to be placed on the bed, and the material is placed on the outer periphery of the hearth (in the furnace diameter direction) (moving) in order. The raw material charge was fed in the furnace for J weeks. The sides (the Λ plates 67 described above move the raw material load on the rotary hearth toward the outer periphery j of the hearth (outside of the furnace holding direction), so they are arranged obliquely from the direction. In addition, these baffles 6 2 The state above the hearth 2 is' supported to be fixed to the furnace body; Secret 4. Top wall part, etc. '' By pushing the raw materials on the rotary hearth 2: Push the raw materials into the hearth in order: object oblique = Form, 'The width direction of the hearth is divided into three areas 2a ~ 2a3 by the door. Among them, the back side of the baffle 67a (the hearth rotation direction is the second side area 2a) In the middle of the entrance 5, X, the outermost area is provided with the raw material Xiang 3 picking plate 67e on the front side (hearth back 477817 V. Description of the invention (108) upstream side of the direction of rotation) is provided with a raw material outlet 6. Two U: The 69a, 69 "system gas sealing plates' are used to isolate the second and second parts of the fish C (the raw material inlet 5) and the raw material feeding part (the inner space of the raw material feeding out) to suppress the ambient temperature to Compared with other RHF's according to this embodiment, the material of the hearth t is loaded from the inner periphery of the furnace toward the outer periphery by the action of the baffles 67a to 67c. The sides move in order, so the distribution or unevenness of the temperature conditions in the furnace in the circumferential direction and the radial direction can be eliminated, and the preliminary reduction of the raw material ore can be efficiently performed. Π ..., π Figure 41 is the original According to another embodiment of the present invention, twisted plates 68a to 67a for revolving the load as shown in FIG. 42 are provided at three locations in the furnace diameter direction. During the time that the load is rotated in the furnace for three weeks, the raw material on the hearth is quilted. Guided to the twist, ~. 68c is lifted to the upper side, and then fed to the above-mentioned twisted plates 68 on the outer peripheral side again, as shown in FIG. 42, the short sides with the plate length are at tens of degrees ( For example, 90.), the whole plate has a twisted structure (shape), and the short side portion on one end side is set slightly close to the hearth surface and close to it, which is the same as the above-mentioned baffle 67 and supports The furnace wall 3 (side or top wall portion) fixed to the furnace body 1. Therefore, as shown in FIG. 42, the raw material guided to the twisted plate 68 from the left-hand front side in the figure is tied to the length of the twisted plate 68 The direction is lifted &amp; it is fed out of the right direction in the figure and dropped to the hearth again. C: \ 2D-C0DE \ 90-02 \ 89118226.ptd page 114 4/7817

Similar to the embodiment of FIG. 40, this embodiment is also divided into three regions ^ to 2 ^ along with the arrangement of the twist plates 68a to 68c, of which the twist plate 68a in the innermost region 2ai The rear side I is downstream of the hearth turning direction) is provided with a raw material loading inlet 5, and the front side of the twisted plate 68c in the outermost area 2a3 (the side of the hearth turning direction) is provided with a raw material feeding outlet 6. . In the figure, 69a and 69b are the same gas seal plates as those in FIG. 40. According to the RHF of this embodiment, by the action of the twist plates 68a to 68c,

= The raw material load on the bed moves sequentially from the inner side of the furnace to the outer side. The preheating of the raw material load caused by the distribution or unevenness of the temperature conditions in the furnace in the furnace inner and radial directions. The phenomenon of temperature or reaching metallization can be eliminated. ~ Since the twist plate 68 is the original on the hearth side of the material layer, the raw material can be moved to the upper side of the lower layer side (hearth surface side) of the material layer. Since the rotation of the raw material at that time, its heating surface also changes. Therefore, compared with the above implementations of 眚 @ &gt;, U ^ 敉, it is more effective to eliminate: the preheating temperature or The non-uniformity of the metallization rate, and the rate of discharge, preheating of the raw material charge and preliminary reduction of the ore.

In the form of% L λ, even if the raw material load is not laminated, the heating surface of the raw material (W granules or shaped bodies) will change, which has its effect. Shown in circle i 43 is another embodiment of the present invention, which has a spiral device 70 on the hearth two, and the raw material is charged and transferred by a spiral device 70 and stirred (w (Ie, digging) to rotate the raw material relative to the hearth surface and / or. Especially when using this screw device 70, the use of

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Fifth invention description (1 1 1) ϊΊΐίϊΊΐ can adjust the rotation speed of its spiral body 74 (screw shaft), can produce 揎 Μ; spine, that is, as shown in Figure 45 (c), if the spiral swing machine, screw% device 72 series as Feeding speed of raw materials Pei Zhi = Earth: Raw materials are fed into and out of the furnace. On the other hand: the second furnace rotates at a small rotation speed of A g, as shown in Figure 45 (b), the screw / dream stop device; for the mixing of raw materials into the material layer, the 72-series mixing device The raw materials of the layer are moved in the width direction of the hearth, and the raw materials of the raw material layer are mixed and stirred. In addition, if you stop loading the raw materials in Figure 45 (a) at 11 o'clock; § The bucket i continues to rotate the carcass body 74. If not, the raw materials are loaded into the raw material system board of the layer. Will hardly move. The leaves of the exhausted carcass 74 are, in the use form shown in Fig. 45 (b), by using the rotation speed of the spiral 74, it is possible to sculpt 棼 褕 戍 * 古 & hunting by properly adjusting the mixing-stirring furnace The amount of raw material movement in the direction of the bed: / that is, 'by adjusting the rotation speed of the spiral body 74, the movement of the parent rotation can be adjusted', the momentum M, so that relative to the width of the hearth of the RHF ..., you can set-adjust any remaining in the furnace Time 1 ^) or Rensi's mixing-stirring times N (= w / M). Thereby, the metallization ratio of the semi-reduced iron discharged from RHF can be extremely high. By rotating and / or moving the raw material load relative to the hearth by mechanical means as mentioned above, the temperature in the furnace atmosphere can be adjusted from low temperature to high temperature from the heating period after the raw material is loaded to the time of feeding. . In addition, even if the raw material charge is not dried, it can be dried and reduced in the initial stage of the charge. … Also, when mechanical means are installed within the height of the raw material loading level, since C: \ 2D-CODE \ 90-02 \ 891I8226.ptd Page 117 4/7817 V. Description of the invention (112) Mechanical means will not be affected Durability from the inside of the furnace. Tian 'therefore can improve the machine virtue = to rotate the raw material I character layer raw material on the hearth and / Ming private: structure, not limited to those in Figure 40 ~ 44, but also can be moved or can be used other than the above spiral device Machinery; = average of the preheating temperature or reduction rate of the bell material load = = the original, such as when the pellets are stacked in one layer, because it is achieved. Less effort is required, and a simpler mechanism can be used. ”According to the above-mentioned metal chain method (melon) of the present invention, a reduction reduction furnace can be used in the horizontal moving hearth type. The structure and function of the preliminary reduction furnace other than horizontal movement are the same as those of the earlier invention. ^ The description of the chain member method is the same, so here is the description of the second system D · metal chain method (ιν). Pret ί ί: I When the metal chain method of various forms is actually implemented, The fuel gas I with the heating burner used in the preliminary reduction furnace has the problems of utilization of the exhaust gas discharged from the melting furnace. That is, in the reduction process of the mixture raw materials in the original furnace, P is used in preparation The fuel gas of the returning device uses the gas generated by the melting furnace, and 1 t heating and combustion are used in the same level. The overall energy efficiency of the process can be 1 θ, the old two-temperature state makes the situation better. Bran, and the furnace Low internal pressure melting furnace (for example, the absolute pressure of the gas in the furnace does not reach 12). Because of the low pressure, it is necessary to increase the pressure and supply the device. However, the gas system in the melting furnace contains ~ 7 miles &lt; Dust, Jit method uses compression It will be difficult to use it as a heating burner: it will be difficult to use it as a heating burner: C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 118 V. Description of the invention (113) Use of gas. Another aspect is the melting At the level of effective utilization of the gas generated in the furnace, it can be considered to set the boiler to recover the steam from the sensible heat of the gas. For this reason, # the boiler or the turbine that recovers the steam to generate electricity, its equipment is no longer reachable =: 程 ϊΐ 大 i f On the one hand, if the gas generated by the melting furnace is "discarded", it will be difficult to improve the overall thermal efficiency of the process. In view of these problems, the metal chain method of the present invention (which can be equipped with gold: using the gas generated by the melting furnace, 卩The high-temperature state is used as the fuel gas for the pre-reduction furnace j ， ”. It can be operated with less energy source units: to reduce the cost of melting and reducing the production chain of iron oxides and other metal oxides and / or metal hydroxides and Improved productivity. The present invention: the first form of the chain manufacturing method (XV), which includes: a mixture of one or more raw materials selected from the following J (a) to (c), in a rotary furnace: a horizontal moving furnace Bed type, multi-layer hearth type, or rotary? A part of the oxides and / or metal gas oxides is prepared in a way of returning the gold to the state of the furnace, and the preliminary reduction step (A): (a) is obtained by mixing at least carbon 2 with iron ore Raw materials for the mixture, (b) at least the raw materials of the carbon material: stone mix: and granulation, (c) at least the raw materials of the carbon material: preparation of Liaoyuan: ^ yanginwu; ^ # 物 raw materials, and In this step (Α), the raw material δ, which is to be reduced, is loaded into a melting furnace for a metal chain, and the melting furnace is made of carbon material, and the carbon material is: Step (B) of disintegrating the main heat source is to use at least a part of the high-temperature generating gas generated in the above step (B) by using combustion air and / or dissolving. 5. Description of the invention (114)-ΐ of The gas ejector acts as a heating burner for fuel gas people who are ready to retreat. Ceremony 2 'The i-th aspect of the metal chain method (IV) of the present invention includes: one or more mixture raw materials of (a) to (c), a rotary hearth type, a multi-layer hearth Furnace-type or rotary-rich-type preparation: = Medium, the step of pre-reduction in the manner that the metal oxide and / or metal hydroxide is returned to L = state (A): (a) 3 J iron ore Mixed raw materials obtained by mixing and granulating, (C) S = \ Mixed raw materials obtained by mixing and forming iron ore; and a melting material which is used to load the raw mixture of raw materials prepared by Ye 1 (Α) into the metal chain Furnace 'Burn furnace: So: Inner 丄: Carbon material is the reducing material' and the combustion heat of the carbon material is: ^, less than one part, cool down to below c /, and the two raw materials are: Ϊ: Dust in the body, and then supply it to the heating burner of the above-mentioned preliminary reduction furnace as an office milk at high temperature. ，，，， / ίί The metal chain method (IV) of the present invention 'can be used to generate the same gas in the melting furnace; for the use of fuel gas for the heating burner of the preliminary reduction furnace,' it can be operated with less energy source units device. In the following, the details of the metal chain method (丨 v) reduction furnace of the present invention will be described. The raw materials of the mixture in the preliminary reduction furnace in the chain method (IV) of this preparation are the raw materials of more than one of the following U) to (c). Page 120 C: \ 2D-CODE \ 90-02 \ 89118226.ptd V. Description of the invention (115) (:) to X. Mixing carbon materials with iron ore to obtain at least mixing carbon materials with iron stones And granulation: two (C) at least the carbon material is mixed with the iron ore and formed the mixture: furnace hearth type, horizontal moving furnace: the second type of the pre-reduction furnace pre-reduction to make the iron ore second melting After reduction furnace (SRF), etc. iii5 ~ 55%), put it into an iron bath type melting t £ ^) t risRF ^ 5 &quot; SRF ^^ Burning and what happened in the furnace = the iron that burns the material The dissolution and final combustion of the ore is a source of heat. In this metal chain method (IV), at least part of the milk in the high-temperature melting furnace generated by SRF is by using combustion air and / Or the ejector of the pressure-increased gas after the gas dedusting in the melting furnace acts as a heating burner for the fuel gas blown into the preliminary reduction furnace. Or, at least a part of the gas generated in the melting furnace generated by the SRF is cooled to below 800, and then the dust in the gas is recovered by a high-temperature dust removal device, and then it is used as a high-level sorrow. The fuel gas is supplied to a heating burner of the preliminary reduction furnace. Hereinafter, an embodiment of the metal chain method of the present invention will be described using RHF as a preliminary reduction furnace and SRF as a melting furnace as an example. As the RHF ', the RHF shown in Figs. 2 and 3 or the RHF shown in Figs. 22, 23, and 24 can be used. The basic structure or function of these RHFs is the same as that described earlier in the description of the first form of the metal chain method of the present invention. Therefore, detailed descriptions are omitted here. In the preliminary reduction operation using such RHF, the metal chain method of the present invention

477817 V. Description of the invention (116) (IV) In the first form, at least a part of the gas (exhaust gas) generated in the high-temperature melting furnace is generated by using the combustion air and / or the melting furnace to remove dust. The ejector of the post-pressurized gas acts as a fuel gas blow-in pre-heating burner for the reduction furnace. With this, even when the generated rolling body discharged from the melting furnace = has a low pressure, the high-temperature melting furnace gas can be supplied to the pre-reduction furnace burner without using a compressor or other booster device. Fig. 46 is a method of the first form of the metal chain method (丨 V) of the present invention. ^ Y = a method suitable for a case where the pressure of the SRF-generating gas is relatively low (e.g., the absolute pressure does not reach 1.2 atmospheres). In the picture, 20 series ^ ?, 75 series hot cyclone separator, 76 series Venturi atomizer, 77 series gas storage, 78, "" are SRF generating gas (SRF generating gas after dust removal) and combustion. * = Compressor, 18 series RHF, 63 series heating burner of this RHF, 80 series two pipes between compressor 78, 79 and heating burner 63. Each compressor 78 79 and heating burner 63 On the way of piping 80 (partially added to the office equipment, n) '$ 成 有 喷,' here is followed by a self-heating cyclone = the gas piping 82 branched off from the outlet side of the machine 75. Also, this gas piping 8 = M, in order to control the gas supply amount 气体 to the gas piping 82, after the srf generated gas is removed by one k from the hot cyclone π, it is recharged by the venturi atomizer 76 via the control valve 83 After dust removal, it is temporarily stored in the gas reservoir 77. This gas, inside 77: SRF gas is generated by the compressor. It is blown in through the ejector 81. Second, the combustion air is also passed by the compressor 79 Injection benefit 81. The person enters the heating burner 63. Moreover, the dust removal srf occurs W, C: \ 2D-GODE \ 90-02 \ 89118226.ptd Page 122/01 / V. Description of the invention (117) The gas and combustion air are supplied to the heating burner 63. The gas piping 82 m = sRF is generated as appropriate. The proportion is divided into gas and / or combustion-using V gas? The speed of the SRF of the mills 78 and 79 is affected by the gas piping: two-speed blow-through, the high temperature of the ejector caused by the ejector 81 The SRF generated gas is heated by the outlet pipe of the separator 75 and the gas pipe 80 * into the H / b—the SRF generated gas system is injected into the heating burner 63 by injection. Based on this, the SRF can be used for painful riding + ^, _8 for heating burners = ;: Some women use high temperature as sensible heat. With acetylene supply, the SRF gas can be effectively used. Figure 47 (cross-sectional view) is a jet crying μ ^ ^, 1 ^ 1 ^ ^ ^ ^ II ^ H84;, Λ ^ ^ 〇87 苴 inside, and After the dark spray, the end side extends to two = the piping 80 of the base pipe attachment of the discharge pipe section 86. #From this injector 81, the gas and / or combustion air generated by the compressor SRF is passed through the blow pipe 85 = =, within 84, with the injector at that time as a self-priming ... 82. The temperature of the SRF generating gas system of 咼 咼 is attracted to the injector 〃— and blows into the heating burner 63 'through the discharge pipe 86. In addition, in the case where the front nozzle portion of the blow pipe 85 is as shown in the figure, a gas production of about 50 m / &amp; ~ sonic speed can be obtained.

Let the nozzle, its inner diameter) T be tapered ', as in the case of a puller, which can also increase the gas flow rate and increase the ejector effect. , B C: \ 2D-CODE \ 90-02 \ 89118226.ptd p.123 477817

In addition, as shown in the figure, the heating of the partial discharge pipe portion 86 is ^ 10 ^ # „〇 ^; if the oblique angle is less than 5 °, the expansion of the discharge gas at the front nozzle portion will be suppressed by =, and the ejector effect will be caused. Weakening. The other is Capricorn 10 .: Then the turbulent flow will be generated around the spouting gas jet ::; = Exceeding will weaken the effect of the ejector.

In addition, the SRF-generating gas can also separate the A dust by the hot cyclone and be attracted to the ejector 81. In this case, the temperature of the gas in the Chain-: two-party thoron separator is reduced, so there is a thermal efficiency ... Therefore, if the dust contained in the hot cyclone is attached to the gas piping, if it can be prevented, the Behr SRF gas should be supplied to the heating burner 63 without first removing the dust from the hot cyclone 7 /. In order to prevent the dust contained in the ionizer from adhering to the gas piping, it is preferable to use, for example, a system to form a water-cooled structure, or set a pan to roll in the gas piping system to reduce the temperature of the SRF gas to 95. It's below. Solitary Figure 48 is an example of the second form of the metal chain method (IV) of the present invention. This method is applicable to the case where the SRF generating gas has a relatively high pressure (absolute pressure of 2 to 3 or more). In the figure, the 8-8 series boiler , 8 9 series of high temperature dust removal device, 90 series of SRF generated gas from SRF2 0 through boiler 88 and high temperature dust removal device to the gas piping for heating burner 6 3, 9 1 is installed in this gas piping 9 3 flow rate on the way Regulating valve '9 4 is a flow regulating valve provided on the piping 95 for supplying fuel (such as LNG, kerosene, etc.) to the heating burner 63, and 96 is for measuring the flow rate and gas composition of the exhaust gas in the gas piping 90 , Gas temperature, and root

C: \ 2D-00DE \ 90-02 \ 89118226.ptd Page 124 / «17

477817

Up to the right, the high-temperature bag filter can remove the dust from the soil up to 0 · 05 ~ 0.1. Therefore, by using such a high-temperature dust removal device, there is a concern that dust may adhere to the inner wall surface of the downstream gas path. It is stated that since the generated gas discharged from SRF20 is relatively high pressure, it can be supplied to the heating burner 63 without being boosted. Dust extraction, the reaction of dust and dust removal components (ceramics), sintering will be combined into the dust, so that the dust removal performance is reduced. It is 80nv. The temperature of the generated gas discharged from SRF20 is reduced to

▲ The next ^ is sent to the high-temperature dust removal device 89. Therefore, in this embodiment, the boiler 8 8 is installed before the high-temperature dust removal device 8 9, ^ The sensible heat of the gas is recovered, and the temperature of the gas is reduced. ^ 〇 ^ C or less. The high-temperature generated gas that has passed through the boiler 88 and the high-temperature dust removal device μ in this way is pressure-adjusted by the pressure adjustment valve 91 and is supplied to the heating burner 63. In addition, as a mechanism for lowering the temperature of the generated gas / C or lower, any one can be adopted, and it is not limited to a boiler. 96, the gas piping 90 can be continuously measured. The gas temperature is based on these results, and the flow rate is such that the gas flow rate corresponding to the generated gas is supplied to the heating burner 63.

In addition, by measuring the gas flow rate, gas composition, and volume adjustment valves 92, 94 in a control device, the most suitable combustion air or combustion is used as a preparation other than RHF in the metal chain method (IV) of the present invention. Reduction furnace: the structure or function of the preliminary reduction furnace using horizontal moving hearth type, multi-layer hearth type or rotary rich type is as described in the description of the first form of the gold chain method of the present invention. Therefore, here The description is omitted. ~ &Quot;

477817

E. Metal chain method (V) When the various metal chain methods of the present invention described above are actually implemented, there is a problem of preparing fuel gas for heating the burner of the reduction furnace. That is, the box is ready to return! In the reduction treatment of the mixture raw materials in the furnace, 1 is used to add: Combustion is the fuel gas, and the gas generated by the melting furnace is used. Although it is the best in terms of energy efficiency, the gas generated by the melting furnace ^ cal Approximately 80 0 ～ 1 80 0 KCal / N „3, in general, it is 1100 ～ 14 = basket

Kcal / Nm3, so it has lower flammability than pure fuel. Therefore, in order to achieve stable combustion, it is necessary to use a pilot nozzle or a combustion-supporting burner using a pure fuel. Therefore, in addition to the problem of increased installation cost, there is also the problem of an increase in the original energy unit due to the large amount of pure fuel used. In contrast, the metal chain method (V) of the present invention can use the gas generated in the melting furnace as a fuel gas for heating the burner of the preliminary reduction furnace without using a pilot nozzle or a combustion-supporting burner. It can be operated with less energy source units. Through this, the cost reduction and productivity improvement of the smelting reduction chain of metal oxides and / or metal hydroxides such as iron ore can be achieved. The metal chain method (V) of the present invention includes: a mixture of at least one material selected from the following (a) to (c) in a pre-reduction furnace of a rotary hearth type or a horizontal moving hearth type; Preparative reduction step (A): (a) at least a mixture of carbon material and iron ore, and (b) at least carbon Raw materials obtained by mixing and granulating materials with iron ore, (c) at least raw materials obtained by mixing and forming carbon materials with iron ore; and

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 127 477817 V. Description of the invention (122) The raw material of the original mixture is charged into a melting furnace for metal chains. In this melt, carbon material is used for reduction. And the main heat source is the combustion heat of the carbon material and the combustion heat of one of the carbon oxides generated in the furnace, which are melted and finished ^ step (B), in the preliminary reduction furnace of the above step (A), as a heating furnace The machine cover is provided with a tubular flame burner, and the melted and generated gas generated in the above step (B) is supplied as a fuel gas to the tubular flame burner. -Know ^ 'here-in the metal chain method' 'better' 'After the slagging of the refining furnace is removed, it is supplied to the tubular flame tent of the preliminary reduction furnace and the gas generated by the refining furnace is stored in The gas reservoir is supplied from this gas to the tubular flame burner of the preliminary reduction furnace. According to the above-mentioned metal chain method (v) of the present invention, it is possible to prepare the gas generated by the dissolution furnace: ΐ: Ϊ: ί fuel under the ignition nozzle or combustion-supporting burner, and there is less fuel gas branch for preparing and heating the burner. The energy source unit performs the operation of the equipment. τ 2 U ί The invention of metal chain method is explained in detail. The material raw materials are the following mixed iron materials (a) to (c) 7 that are put into the pre-return furnace (two (C) at least carbon materials and granulated mixture material materials. / 、 铁 广 石 h 合And forming the mixture originally prepared this mixture into a reduction furnace, prepared in the way of iron furnace f hearth type or horizontal moving hearth type (pre 55%); f ”average metallization rate (Should be 5 ~ ^ ^ Put it into an iron bath type smelting reduction furnace

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 128 477817 V. Description of the Invention (123) First (SRF) and other melting furnaces for metal chains (the following uses SRF as an example), in In this SRF, the carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat of carbon monoxide occurring in the furnace are used as the main heat sources to perform the melting and final reduction of iron ore. In addition, in this metal chain method (V), a tubular flame burner is provided as a heating mechanism in a preliminary reduction furnace, and the gas generated in the dissolution furnace generated in the above step (B) is supplied as a fuel gas. To the above-mentioned tubular flame burner. Hereinafter, the embodiment of the metal chain method (v) according to the present invention will be described using RHF as a preliminary reduction furnace and SRF as a melting furnace as an example. As the RHF, the RHF shown in Figs. 2 and 3 or the RHF shown in Figs. 22, 23, and 24 can be used. The basic structure or function of these RHFs is the same as that described earlier in the description of the first form of the metal chain method of the present invention, and therefore the description is omitted here. In the preliminary reduction operation using such RHF, the present invention is to provide a tubular flame burner as a heating mechanism on the rhf, and to supply the SRF generating gas as a fuel gas to the tubular flame burner to perform the preliminary reduction of the mixture raw materials. Here, the tubular flame burner means a burner formed with a tubular flame, and is generally provided with an inner wall surface of a tubular combustion chamber opened at the front end, so that the gas injection direction is eccentric with respect to the shaft core of the burner body, Particularly preferred is a burner that directs the gas injection direction along the tangential direction of the inner wall surface of the combustion chamber and blows the fuel gas and combustion air or a plurality of slot-shaped gas inlets (gas nozzles) for the injection of the premixed gas. .

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd V. Description of the invention G24) -----— 生 2 #Official flame burner is excellent in flame retention and suitable for SRF ^^ When the value gas is used as the fuel gas, the heating and combustion parameter 1: the tubular flame formed in the burner, in addition to the high thermal insulation of the temperature distribution and IL ′ 'for the rotational movement of air flow in aerodynamic :. An 疋 [Excellent characteristics as a flame supplied to a practical combustion machine. In addition to being able to easily achieve lean mixed combustion, it can also be used to reduce the exhaust of coal that is emitted in the case of excessively rich mixtures. Yitu brother load reduction is also a favorable burner. &lt; This tubular flame burner can adopt (丨) the method of blowing the fuel = premixed gas of the body and the combustion air from the gas blowing inlet, or (2) blowing the fuel gas; the combustion air is blown from different gases The method of inlet blowing is implemented. In particular, the method (2) can preheat the fuel gas and fuel air without the danger of backfire or explosion. Therefore, the combustion efficiency of the tubular flame burner can be improved, and stable combustion stability can be obtained. Figs. 49 and 50 are examples of the tubular flame burner used in the present invention, and Fig. 49 is a perspective view 'and Fig. 50 is a radial sectional view. This tubular flame burner 9 7 has a tubular combustion chamber 9 9 whose front end is opened inside the cylindrical burner 9 8. The inner wall surface of this combustion chamber 9 9 is formed so that the gas injection direction is along the inner wall surface of the combustion chamber 9 9. The slot-shaped gas blowing inlets having a positional relationship of 18 0 in the circumferential direction are 100 a and 100 b. These gas blowing inlets 100a and 10ob are connected to gas supply nozzles 101a and 101b, respectively. In addition, three or more of the gas blowing inlet 100 and the gas supply nozzles 101 connected to the gas blowing inlet 100 may be provided in the circumferential direction of the burner body 98. In this embodiment, fuel gas is blown from the gas blowing inlet 100a,

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 130 477817 V. Description of the invention (125) Combustion air is blown into the combustion chamber 9 9 from the gas blowing inlet 1 0Ob. As shown in Fig. 50, a swirl of gas is formed along the inner wall surface of the combustion chamber 99 to form a tubular flame as shown in the figure. The premixed gas of fuel gas and combustion air can also be blown into the gas inlets 100a and 10qb. In this case, in order to avoid the danger of backfire or explosion, the premixed gas is preheated. The temperature is below 500 ° C, and more preferably below 300 ° C. Further, in the method of blowing in without mixing the fuel gas and the combustion air, since both the fuel gas and the combustion air can be preheated to a higher temperature, the thermal efficiency can be further improved.

As another form of the tubular flame burner, in addition to the gas blowing inlet 100, a gas blowing inlet for a gas such as fuel gas and combustion air, which are separately provided in the axial direction of the burner 98, may be used. The construction. Fig. 51 and Fig. 52 show the RHF provided with the above-mentioned tubular flame burner 97 as a heating mechanism, Fig. 51 is a plan view, and Fig. 52 is an explanatory view of the installation state of a tubular flame burner 97. … &Quot; The tubular flame burner 97 is arranged at an appropriate interval in the circumferential direction of the furnace body 1 of the RHF without 'for example, it is arranged and fixed so that the front end of the burner body g 8 shown in FIG. 1 inside. Also, in this embodiment

In the middle, the tubular flame burner 97 is set to be level with the upper part of the furnace wall 3, "as required", or as shown in Fig. 53, it is set to the lower part of the furnace body 1 (and Rotary hearth closer)) obliquely downward. Alternatively, as shown in FIG. 54, the top wall of the furnace body 1 may be disposed downward. In addition, in the drawing, 69a and 69b are the four separated between the raw material loading section (original port 5) and the raw material feed-out section (raw material feed-out port 6) and other furnaces.

477817 V. Description of the invention (126) Gas sealing plate (partition). The installation of the tubular flame burner 97 to the furnace body i should preferably be arranged such that the combustion flame expands from the side wall or the top wall of the furnace toward the furnace. In the tubular flame burner 9 7, the tubular flame is formed stably inside the burner. Therefore, in consideration of the protection of the outer tube portion of the burner, the front end of the burner should be formed on the same surface as the inner wall surface of the installed furnace. . In each of the above-mentioned tubular flame burners 97, in addition to the combustion air, an SRF-generating gas is supplied as a fuel gas. As mentioned earlier, these combustion air and fuel gas systems can be mixed and supplied to the burner in advance, but each gas supply nozzle 101a, 10b should preferably be introduced and blown in from each gas blowing inlet 10a, 100b. Inside the combustion chamber 99 inside the burner body 98. From the gas blowing inlets 100a and 100b, the combustion air and the combustion gas system blown into the combustion chamber 99 are burned under a gas swirling flow, and a tubular fire is formed in the combustion chamber 99. Since then, the combustion gas stream of the combustion chamber 99 is introduced into the mixture, and the raw materials of the mixture are heated by radiant heating or direct heat transfer. The SRF generated gas is used as the combustion gas of the tubular flame burner 97, and the higher the temperature of the gas when it is supplied to the burner, the better the flammability, which is more satisfactory to us. A particularly good SRF generating gas temperature is not less than 400 £? C and preferably 600. . The above is preferably at 700. . the above. $ Is because when the temperature of the generated gas is above 70 ° C, even low-calorific gas, it is close to the temperature of the ignition temperature of CO or heart gas in the lice, so the combustion stability is good. Also, self-inhibition From the viewpoint of dust adhesion on the wall surface of the gas flow path, the temperature of the SRF-generating gas should be 95 ° C or less. In addition, the preheating temperature of the combustion air has no concern about dust adhesion, so

Page 132 4 // 817

It should be the higher one within the allowable range in energy balance or equipment cost as the preheating method for supplying to the tubular flame to burn ^ ^ ^ ^ as in the second burned oxygen of the present invention = ， You have used the exhaustion chain ;: households; 埶 埶 孰 孰 孰 孰 孰 孰 古 古 古 古 古 古 古 古 发生 发生 发生 发生 发生 古 古 古 古(;) 丄; the method of preheating in the heat exchanger, the sensible heat of the gas obtained by the heavy oil and other transported gas, consideration or countermeasures in heat exchange: but of course, the durability of the heat exchange benefit must be adequate. In this way, the Ming system also uses the tubular flame burner 97, so although it is a low-calorie-value gas of about 800 to 1 800KCal / Nm3 (usually 1100 to 14000Kcal / Nm3), but It can also be used for stable combustion without the use of ignition nozzles or the like using pure fuel. The gas from the refining furnace can also be introduced into the flame burner 9 7 'without dust removal, but in terms of burner loss, it should be removed after dust removal (at least once, preferably once and twice). Introduce a tubular flame burner 9 7. In addition, the gas generation system of the melting furnace supplied to the tubular flame burner 97 is temporarily stored in a gas reservoir, and the gas composition, gas pressure, and gas flow rate are stabilized before being supplied to the tubular flame burner 97. Tubular fire

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 133 477817 V. Description of the invention (128) The flammability of the flame burner 97 is further stabilized. For example, when the refining furnace is SRF, if there is a gas reservoir with a capacity equivalent to at least 5 to 10 minutes of the generated gas flow, the flammability of the tubular flame burner 97 can be sufficiently stabilized. Figure 55 is an example of the equipment configuration with gas storage, 20 series SRF, 75 series hot cyclone separator, 76 series Venturi atomizer, 77 series gas storage, 78 series, shrink, SRF gas generation system The hot cyclone separator 75 and the venturi mist dagger 76 are made-after the person and the primary dust removal, they are stored in the gas reservoir 7 7 and supplied to the tubular flame burner 79 by the &gt; 1 shrinkage machine 7 8. The storage capacity is sufficiently A, because it can be used as the amount of exhaust gas :: Γ, stable, and smoothing of Λ, etc., so it can be used for tubular flame burners. As I wish. For iron ore = judge 'equipment costs will be prepared' relative to the smelting reduction of the furnace core of the smelting reduction furnace to set at least 50X5U ", maximum 15000xS skin cross-sectional area, 2), if a gas reservoir with a capacity is provided, it can be charged 1 to 60 0 X 5 (胪) Stable combustion around. Ensure the official flame burner 9 7 In the metal chain method (v) of the present invention, the furnace can also use the horizontal moving hearth type or a preliminary reduction other than the second Furnace. Horizontal moving hearth type and multi-lu. Two = The preparation and reduction of the hearth furnace type are the same as those of the preliminary reduction furnace of the second type of the present invention. Therefore, the 'metal chain' is omitted here. F. Metal chain method (v I) '° described in the method description. The above-mentioned various metal chain methods of the present invention will be preloaded when the percentage is not true. Page 134 C: \ 2D-CODE \ 90-02 \ 89ll8226.ptd 477817 V. Explanation of the invention (129) The problem of bursting of the raw materials (especially pellets or shaped bodies) of the m furnace. No. &amp; &lt; &amp; : Original: The original center of the mixture on the rotary hearth is at ^ = 'f-The surface is mainly composed of the heating burner The radiant heat is heated-heated up 'after being reduced to a certain metallization rate. (Also, 69a, 69b are gas seals used to isolate the raw material loading section and the feed output section from the space inside the furnace. Board). Out. I ..., his atmosphere is extremely high temperature (for example, the original two of the dried things in the picture, Lizhong 'in the furnace

Left and right), so if the manufacturing = ~ 150 ° C 4 take the at load (pellets, garden φ $ after 3 drying 'in a high-temperature pre-reduction furnace ㈣, anxiety! &Quot; also add ΐ In this way, the load will explode due to the rapid expansion = beforehand = management, and the installation of drying equipment will recruit.; = Increase, unsatisfactory. ~ <Needle = a problem, the metal chain method of the present invention (VI) The raw materials such as granules are dried beforehand. Special treatment is required. 2 The metal materials such as iron ore and other metal oxides can be obtained by making efficient preliminary reduction while preventing the raw materials of the mixture in the preliminary reduction furnace from bursting. And / or the cost reduction and production improvement of the metal oxide melt reduction chain. The metal chain method (VI) of the present invention includes: one or more mixture raw materials selected from the following (a) to (c) In rotary hearth, horizontal moving furnace

477817

The bed type or multi-layer hearth furnace type g I reaches the state of metallization, with the legacy: the iron ore-part of at least the carbon material and the iron ore mixing step ⑴: (a) carbon material Mixing and granulating with iron ore and: two raw materials, (b) at least mixing and forming carbon materials with iron ore =, in the molten metal Λ # = metallurgical furnace for metal chain &quot; In step (A), a preliminary reduction furnace is loaded: the above-mentioned raw materials of this compound are preheated and dried with a preheating gas, and then heated-reduced. In the metal chain method, the form (1) and / or (2) is particularly preferable, and the form (3) is more preferable. (1) Use the following (1) to separate the pre-reduction furnace from the raw material loading section into a pre-belt and its subsequent heating-reduction belt. After pre-drying the mixture of raw materials above the heat-drying belt, then continue with the above The heating-reduction zone is added to the original. (,,,, -move) (2) As the preheating gas, the gas generated by the metal chain furnace, the gas discharged from the heating-reduction zone of the preliminary reduction furnace, or the air preheated by the sensible heat of these gases . ~ (3) The pre-heating gas temperature of (2) above is 100 ~ 400. (:. According to the above-mentioned chain manufacturing method (VI) of the present invention, even if the raw materials of the mixture and the like charged in the preliminary reduction furnace are not subjected to special pre-drying treatment, &gt; Next, the ancient 4α effectively performs the preliminary reduction of the mixture raw materials.

V. Description of the invention (131) — The detailed original principle of the metal chain manufacturing method (VI) of the present invention is: = 'Loading the contents of the preliminary reduction furnace (a)', 'L a) in the chain manufacturing method (VI) (c) More than one of the raw materials of the mixture. ) To &gt; Mixture obtained by mixing carbon material and iron ore. Raw material mixture obtained by mixing and granulating raw iron ore. A raw material reduction furnace obtained by mixing and shaping iron ore = The raw materials are prepared in a rotary hearth type or a horizontal moving hearth type preparation two original furnaces, and the iron ore becomes a certain average metallization rate: the prepared * method is prepared for reduction, and then it is charged into an iron bath type melt reduction. Furnace) and other metal chain melting furnaces. In this melting furnace, the burning heat of the obstructing materials and the oxidation in the furnace-the second oxidation is used as the main heat source to perform the melting and finalization of iron ore. reduction. … In this metal chain method (VI), the five raw materials j, which are charged into the preliminary reduction furnace, are preheated and dried by the preheating gas, and then heated to reduced. Hereinbelow, the case where RJJF is used as a preliminary reduction furnace is described as an example, and the embodiment of the invention of the metal chain method (VI) will be described. As the RHF, the RHF shown in FIGS. 2 and 3 or the RHF shown in FIGS. 22 and 23 and 24 can be used. The basic structure or function of these RHFs is the same as that described earlier in the description of the first form metal chain method of the present invention. Therefore, its detailed description is omitted here. In the preliminary reduction operation using such RHF, the present invention is to heat and dry the mixture raw materials (hereinafter referred to as pellets) charged into the furnace in the initial stage after preheating with a preheating gas and drying. —Reduction, which can prevent bursts caused by the rapid heating of pellets with internal water content.

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 137 477817

FIG. 56 is an embodiment of the present invention (the plane of the RHF and the circumferential direction of the RHF are distinguished from the side of the raw material loading section), and then connected to the Ting Xi Shi 7 Yiba 1 w &quot; knife preheating-drying belt 102 and And use, gas: the pellet °: pre-Λ belt: ° 3, for the pre-heating-drying belt 102 is supplied to the pre-heating combustion burner for heating, pellet heating 4: m wrong reason right = pre; drying The pre-heating gas for the belt should preferably be from 1.0 to 4.0 t. The human body temperature exceeds 40 °. When the pellets are likely to burst,

Furnace: gas is used for force m, gas produced by the refining furnace can be used, gas, air, inert gas (Nishi Temple! / Rensi gas, nitrogen gas, nitrogen gas, etc.) discharged from the preparatory tower can be used to stand up. In terms of the overall energy efficiency of the process, it is best to use the gas generated by the melting furnace, the gas discharged from the pre-reduction furnace and the gas discharged from the reduction π, or the emptied by the sensible heat of such gases, H °…

The structure that distinguishes the preheating-drying zone 102 from the heating-reduction zone 103, as shown in Fig. 5 ^ 6, 'the raw material loading section (raw material loading inlet 5) and the raw material feeding ° section (raw material feeding outlet 6 ) Adjacent furnace space (the space of the raw material layer on the rotary hearth, the same applies hereinafter), and the gas seal plates 69a and 69b (partitions) shown in Fig. 57 are distinguished from other furnace spaces. And the same gas sealing plate 69c (partition) is set in the furnace space at a certain position on the downstream side of the raw material loading section, and at the appropriate position of the furnace body part constituting the preheating-drying belt 〇2, there is a The introduction duct and exhaust duct (both not shown) of the hot gas are used to supply and exhaust the preheating gas. In addition, the exhaust gas of heating-reduction ▼ 103 can be cooled or heat exchanged to a gas of 100 ~ 40 (pc as

The preheating-drying gas is used. Therefore, the r 4 calamity plus freeze type I &amp; hunting dagger suppresses the overall thermal efficiency of the furnace of the preheating-drying zone 102. Burst or privatization, but can be divided into two parts, as shown in Fig. 5 8 and Fig. 5 9 士 Shila r ^ RHF ^^ ® m other embodiments of the present invention (Fig. 58 is a ten-side view, a diagram Section of the 59 series RHF, bt to date * +, LU ^, 口 μ 1 ^ ΚΗί of the hearth (see the sectional view of the direction of the hearth), in this continuous addition of evil, in the radial direction of the furnace &amp; 仏 Π 之In 0 positions, there are seeding plates 67a ~ 67c that sequentially move the raw materials on the hearth to the radial direction (outward direction) of the furnace (multiple movements) in each week. After being fed out, the first peripheral winding system is preheating-drying belt 1 04, the middle peripheral winding system is heated_strong reduction f 1 0 5, the last peripheral winding system is reducing—temperature adjustment (cooling) belt 1 〇6. In addition, a heat shielding plate is provided above the hearth of the area around the first cycle (preheating-drying zone) and the area around the last cycle (reduction-temperature adjusting zone). The heat-drying belt 104 and the reduction-temperature adjusting belt 106 are shielded by the radiant heat of the flame or the atmosphere in the furnace caused by the heat-shielding plate 1 0 7 ′ loading the raw materials into the layer a self-heating burner 63. In addition, the above reduction-temperature adjustment belt 106 is for reducing the pellets and cooling the pellets to a temperature suitable for the feeding of the raw materials, so as to avoid the melting of the pellets if the temperature of the pellets is too high during the feeding Or cause the problem of loss of raw material feeding device. The structure of the stretchers 67a to 67c or the positional relationship between these seeding plates and the raw material inlet 5 and the raw material inlet 6 is the same as the embodiment shown in Fig. 40 described earlier, and its description is omitted here. In addition, Fig. 60 and Fig. 61 respectively show other embodiments (cross-sectional views of the hearth of the RHF) of the present invention. These embodiments are also the same as those shown in FIG.

C: \ 2D-CODE \ 90-02 \ 89118226.ptd p.139 ^ // «17

$ Each week is sequentially shifted (moved) toward the furnace's radial direction (outward financial direction). $ No), the raw material load is fed out after 3 weeks in the furnace and fed out 'most ^ counter ^ not ~ drying belt 1G4' t Circumferential belt heating 1 reduction belt Circumferential belt reduction after temperature-temperature adjustment (cooling) belt 106. The structure of the furnace wall in the wide direction of the hearth of Li Erguang is composed of two tops, called “top ^ A”, which are two sides of the furnace wall above the heating-strong reduction zone. , = Political heating burner 63. Thereby, in the preheating_drying belt 104 and the reducing_, w belt 106, the raw material is charged into the layer A self-heating burner and the radiant heat of the flame is shielded. &amp; 战 之 向 = ί 3 real :: state ', the space above the hearth is divided into 3 on the wide side of the hearth. The baffled partition plates 108 and 108b constitute a preheating-drying zone, a heating-strong reduction zone 105, and a reduction-temperature adjustment (cooling) zone. A heating burner 63 is provided in the τ region. It is used as a preliminary reduction furnace other than RHF in the chain manufacturing method (VI). 2 ^ The horizontal reduction hearth type or multi-layer hearth hearth type of pre-reduction furnace is used. The structure and function of the multiple-movement hearth type pre-reduction furnace are as early as the first form of the metal chain. The description of the method is the same, so the description is omitted here. The duo 'wire is the same as the above-mentioned metal chain method (丨) ~ (v〗) of the present invention, the common internal communication, 1 ,, i valence initial ⑯ 乂 mainly use RHF as a preliminary reduction furnace, using SRF as the melting furnace The occasion is taken as an example. In RHF, thorium, thorium, etc. are incorporated into one or two or more of the above-mentioned mixed raw materials, and then the thorium ores are prepared for reduction. Here, the mixture of (b)

Page 140 477817 V. Description of the invention (135) '-The raw materials are made of pellets ^) Ximou Ren's 4th place (c) The σ-shaped raw materials are formed into agglomerates and the like. : In addition to carbon coal, coke, petroleum coke, tar, moon, plastic and other carbonaceous materials can be used. One or two or more of them can be used appropriately. From the viewpoint of accelerating the reduction reaction, this carbon material is preferably as small as possible. Therefore, a material obtained by pulverization treatment may be used as necessary. In the absence of pulverization of carbon materials such as coal, the ratio is as small as possible due to high energy costs. -rm Therefore, the particle size of the carbon material (mainly coal) used in the iron melting process should be classified, the carbon material on the fine side is used as the raw material of the above mixture, and the carbon material on the coarse side is used as the carbon in the SRF. material. In this way, a small-size carbon material that is better for this preliminary reduction can be used in the preliminary reduction mixture, and the coarse-side carbon material can be used in the srf, so the amount of fine powder carbon material in which dust is scattered in the gas in which SRF occurs can be reduced . As a particle size separating device for carbon materials, a vibratory sieving device, a wind classifier, a flow-type drying device having a dry classifying function, or a slurry type drying device can be used. ^ In addition, the SRF generated gas contains dust-like carbon materials. Therefore, it is also possible to recover dust from the generated gas and use the dust as a part. I hate one

In addition, in RHF, in addition to the raw materials of the mixture, at least a part of the auxiliary materials of the SRF can be charged (according to the occasion, it can be the whole of the auxiliary materials that should be loaded into the furnace). . As this auxiliary raw material, there are limestone, quicklime, dolomite, etc. used for adjusting the slag test. SRF

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 141

477817 V. Description of the invention (136) Among them, “In the case of filling and loading of uncalcined auxiliary raw materials” Because the atmosphere of RHF can be used (usually 1 200 ~ 150 (TC) for the firing of auxiliary raw materials, so the auxiliary can be omitted A special calcining furnace for raw materials. In addition, the auxiliary raw materials can also be used as part of carbon-containing materials and iron ore (that is, at least a mixture of carbon materials and iron ore, or mixed-granulated or mixed-formed raw materials) Into RHF, or without mixing with the raw materials of the above mixture containing carbon material and iron ore. Also, the exhaust gas of RHF's preliminary reduction furnace is high temperature (1200 ~ 1j00c) ) And the sulfur content is contained at a relatively high concentration (about 30% of the sulfur content in the raw material of the mixture as carbon emissions and coal #) is transferred to the "gas" of RHF, and the auxiliary materials such as limestone or dolomite are charged The rhf calcination = CaO in the material is used as the desulfurization μ of the RHF exhaust gas, and it can also exert the effect of desulfurizing the RHF exhaust gas. Mix the t contained in the srf generating gas: This dust is mixed into the raw material of the mixture. μ / λ produced is the raw material 'Because the lower the amount of attached water, the more it can be used, it should be fully dried. And the original energy unit is reduced, so when loading, dry it, not the grain: agglomerates) It is advisable to pre-heat the dry gas display of the SRF in advance: use the exhaust gas from the RHF and / or further improve the activity of / θ ..., and the overall energy efficiency of the process can be converted into the RHF through the pre-shield shield. The rate of the half return # 1 chain, and iron ore becomes a certain average gold μ iron mixture raw material, which is installed in the SRF, here C: \ 2D-C0DE \ 90-02 \ 89118226.ptd page 142

477817 V. Description of the invention (137) Refined chain for the purpose of final reduction and melting. The pre-reduced mixture raw materials in RHF should be loaded into SRF with great efforts to prevent its temperature reduction and re-oxidation. Therefore, the high-temperature mixture raw materials fed out after pre-reduction by rhf can be contained in the non-open type container described earlier. Medium 'is transported to SRF at a temperature maintained above 600 ° C, or the high-temperature mixture raw material fed from RHF is stored in a gas delivery device, and a non-oxidizing gas (such as by Nitrogen, AΓ, co2, SRF generating gas, RHF exhaust gas, and other process gases (selected one or more) gas is sent to the SRF and loaded into the SRF. By using the non-open container or air delivery device to prevent the temperature of the reduced mixture or the reoxidation from being transferred to the ΓΛ in the SRF, the raw materials of the reduced mixture can be reduced or The energy loss caused by re-rolling is minimized. In SRF ’, carbon material is used as a return shoulder. * The combustion heat and final reduction of the carbon monoxide and the second material in the furnace are used to produce molten iron. —In order to dissolve the heat source and the present invention = in the chain method, each of the examples can be used as SRF, which can be used with the phase of the furnace as a closed furnace body, jealous in the furnace ^ pre-rolled cold furnace body (normal The loading mechanism (such as the nozzle of the original iron bath, and the same as the furnace internal structure (such as the bottom-blowing type, etc.), etc., see the rolling body blowing machine of the hole body in this SRF , Via the above-mentioned materials) and auxiliary materials are charged into the charge (iron ore and carbon surplus), and through the nozzle and the gas blowing machine

477817 V. Description of the invention (138) ---- ~ The milking and rolling system is blown into the furnace. The carbon in the molten iron, which is a carbon material supplied into the furnace, reacts with the oxygen blown through the nozzle to generate gas. This gas: the C0 gas reacts with the oxygen blown through the nozzle to become a CO2 gas. " With the carbon material and the CO heat of combustion at this time, the semi-reduced iron system is melted, and by the carbon in the carbon material, the semi-reduced iron is finally reduced to obtain water. Here, the amount of gas generated from the SRF is related to the amount of carbon material input to the SRF. Therefore, in order to stably generate gas from the SRF, it is desirable to supply the carbon material to the SRF separately in addition to the carbon material mixed in the raw material of the mixture. . Therefore, in the “SRF”, it is desirable to supply the carbon material (mainly coal) through a suitable supply mechanism in addition to the carbon material in the raw material of the mixture. In addition, the SAF in the RHF-SjF process of the earlier field has almost no need to supply carbon materials. If necessary, it is possible to use a method of mixing and co-feeding some coke and raw materials from RHF at the same time. . In addition, considering the stable supply of carbon material in the furnace, the durability of the supply device, and the efficiency of the supply of carbon material in the area where the final reduction is performed (near the interface between the slag and the molten iron), the carbon material should be obtained from the molten iron and The interface of the slag is put in the upper part. As a method for putting the carbon material from the interface between the molten iron and the slag, for example, there are high loading of the carbon material (the so-called gravity drop method), inflow and loading of the accelerated loading from the upper part of the furnace with accelerated gas, Nozzle spraying and so on. In the method of spraying through a nozzle, when the immersion nozzle is used, the tip of the nozzle of the nozzle should be above the interface between the molten iron and the slag. In addition, when the SRF is supplied with a carbon material (in this case, especially coal) in addition to the carbon material mixed in the raw material of the mixture, it is particularly preferable to use

477817 V. Description of the invention (139) Use the following method. As mentioned in ^, during the period between "recovering the SRF and reaching the bath surface of the pre-reduced high-temperature mixture, it is easy to suppress such reoxidation as much as possible due to contact with the gas. The carbon material is put into the SRF at the same time, and falls into the original mixture to reach the bath surface. According to this method, the re-oxygenation of the raw material of the mixture originating from the gas in the state of Wang Xiangming: The following effects can be suppressed (1) because The raw materials of the mixture put into the furnace are covered to fall in the furnace, so the method of mixing the raw materials with the concrete and materials is reduced. The degree of direct contact between the raw milk and the raw milk (2) During the process of the high temperature of the raw materials of the mixture, the Mixing; two; ^ volatile components will gasify, by the volatile body ^, said into ,,)) mixture of raw materials and materials in direct contact with the gas, (3) due to the carbon material or the above-mentioned self-carbon material First, the degree of reoxidation of the volatile gas (its carbon content) of the raw material of the mixture reduced to CD2 around the mixture raw material is reduced. Therefore, the resulting mixture (4) of the mixture raw material is reoxygenated. (Its carbon content or hydrogen content) # ° As mentioned above, the origin of the carbon material.) Is a method of reoxidizing the mixture of the raw materials of the re-oxidation layer, in the case of pre-reduction, specifically, in ^ The raw materials of Renji 5 are particularly easy to be reoxygenated into SRF, and the occurrence of this SRF: The secondary raw materials have a secondary combustion rate of more than 20% at a temperature of 400 ° c or higher. Invention description (14) Each mouthpiece is particularly effective. In addition, according to this method, the carbon material and the raw material mixture 5 are loaded in a state close to the bath or in the contact bath. Therefore, the residual material (carbon material) contained in the carbon material and the mixed raw material is broken. The same effect can be exerted. As a method of +, the loading method shown in Figs. 12 (a) to (d) described earlier can be used. The material is as shown in the earlier Figs. 13 to 15 'SRF The loading position of the raw materials (mixture raw ^ ^ ^^ composite raw material + carbon material) (the loading position of the slag bath surface ') and avoid the oxidizing atmosphere formed by the jet of combustion-supporting gas. Bath surface: in the slag The bath area where the bath generates an upflow, and the bath area where a downflow is generated in the slag (hereinafter referred to as, The combustion gas supplied to the RHF in the downflow region should be supplied with the gas generated by srf. The second one is to maintain a good energy balance in the molten iron process. Also, the development of SRF = once used as the combustion gas for RHF, although it has sufficient Compared with natural gas, the heat generation of SRF is ~~. Compared with natural gas, the heat generation is still small. In addition, in order to remove this dust ("-Γΐ is used as the combustion gas for RHF, it is necessary to clean the generated gas). In general, this dust removal treatment is ^ ^ ^ ^ ^ ", the degree of lee is reduced to around normal temperature. Therefore, ^ raw rolled body should be preheated to 20 (TC or more and then supplied to _. And here-SRF The display of the gas generated by the pre-track burial of the generated gas and / or the use of the display of the exhaust gas from the RHF; can be more effective-part: the row obtained by combustion is used as a melting furnace, as long as the carbon material is used As': 2 source. Burning heat and a gas material generated in the furnace are used as the raw material and the combustion heat of the carbon material is used as the main heat source.

477817 V. Description of the invention (141) The furnace for melting and final reduction of iron ore is not limited to SRF. Therefore, it can also be a type of furnace that uses electricity as part of the heat source. For example, a type of furnace is used in which a carbon material supply device or an oxygen (or air) blowing device is separately installed in a SAF or other electric furnace, and the input power is reduced. The metal oxides and / or metal hydroxides that are the subject of melting reduction in the "_ ^" are explained by taking iron ore as an example, but other metal oxides and / or metal argon oxides can also be used. The object is, for example, N ore, ore, Mn ore, and the like. 'In the metal chain method (ι) to (ιν) of the present invention described above, the average metallization ratio of step (A) mm is not particularly limited, but these metal products are made ΐ 乂: τ, especially metal chain Method (π) is a suitable method suitable for low metals ~ ίν η φ, f. Therefore, these metal chain methods (1) can be appropriately applied to the metal chains of the first and second forms of the present invention. The first metal chain of the invention is in the preliminary reduction furnace. After iron ore (iron in the raw material of the mixture == average metallization rate 5 ~ 55%), the metal chain method is used after the reduction and final reduction. X, this hair ::: J belongs to the chemical conversion rate (average metallization ratio exceeds 5%), this iron ore is unprepared or flat Λreturned / low rate of iron ore 'is set as a total-: Melting and final reduction of the metal chain method, these two metal products, the use of the above-mentioned metal chain method (1) ~ (1 ¥) in the form, can achieve production page 147 C: \ 2D-O0DE \ 90- 02 \ 89ll8226.ptd 477817 V. Description of the invention (142) Improvement of the following 'The equipment which will be suitable for the implementation of the metal chain method of the present invention in various forms mentioned above', especially the raw materials of the mixture which can be reduced by the preliminary reduction furnace 'quickly The equipment that is efficiently transferred to the melting furnace will be described. The conventional manufacturing equipment (melt reduction equipment) equipped with a preliminary reduction furnace (RHF) and a melting furnace (such as SAF) is equipped with a plurality of raw material receiving hoppers for receiving raw materials transported from the side of the preliminary reduction furnace. The ore fed from the preliminary reduction furnace is placed in a transport container (usually a non-open container to prevent the temperature and reoxidation of the ore). This container is transported to the raw material receiving hopper of the dissolution furnace. The method for the container to feed the ore into the above-mentioned raw material receiving hopper, and to transport the obstructing stone between the pre-reduction furnace and the melting furnace. Moreover, the transportation of the above-mentioned container is usually carried out by the upper part of the chain equipment structure ( The reeling machine running on the walking part) is carried out, and the container is wound up by the reeling machine, and the container in the preliminary reduction furnace-melting furnace is transferred. In the above conventional chain-making equipment, the configuration of the plurality of raw material receiving hoppers is not particularly considered. Therefore, in order to feed the raw materials of the containers sequentially transported from the preliminary reduction side to each raw material receiving hopper, the coiling is performed. The machine moves not only in one direction, but also in a direction orthogonal to that direction (horizontal).

Therefore, in this conventional chain-making equipment, it takes time to transfer the container from the preliminary reduction furnace to the raw material receiving hopper, and there is a problem that the feed of raw materials on the side of the preliminary reduction furnace is blocked. In addition, as the equipment cost of the coiler or its rails increases, and the weight of the upper part of the structure increases, the structure of the structure also needs to be strong. At this level, the increase in equipment costs is inevitable.

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 148 477817 V. Description of Invention (143); Prepare! = Container's raw material feeding or container transporting mode, customary-prepare only to take the container to take up the place where the coil is fed from the furnace, take the coil to take pictures, and then transfer the valley to t ΨM ^ ^ bk /, and transferred to the melting furnace side, there is almost no consideration for the efficiency of U ^ ϊί. In addition, among the conventional equipment, the pet is set in the coiler itself:,: =, because of the drive mechanism (coil winch). + This is also the increase in weight of the upper part of the structure. The metal chain equipment of the present invention can transfer the food from the pre-reduction furnace to the melting furnace and reduce the cost. In addition, the present invention has the following features: it is not necessary to set t as the winding drive mechanism on the winder, and it is possible to roll the container quickly and efficiently. At the same time, the drive mechanism can be reduced in size. Specifically, the metal equipment of the present invention is provided with: a mixture of at least one raw material selected from the following u) to (c) into a furnace for preliminary reduction; a) obtained by mixing at least a carbon material and iron ore; (B) at least the carbon material and iron ore are mixed and granulated, and (c) at least the carbon material and iron ore are mixed and formed from the mixed repellent; the melting furnace will be The gold prepared by the above-mentioned preliminary reduction furnace is melted and finally reduced; and transport equipment is used to transport the container containing the raw materials fed from the above-mentioned original furnace to the raw material receiving hopper of the above-mentioned melting furnace; and, The above melting furnace has one or two or more raw material receiving hoppers for receiving raw materials transported from the preliminary reduction furnace, and the above-mentioned transportation equipment has the ability to transfer the container by rolling up the container and walking on the track. $ C: \ 2D-CODE \ 90-02 \ 89H8226.ptd Page 149 '/ δΙ7 V. Description of the invention (144) Winding machine; the orbit of the above winding machine reciprocates in the direction, the upper and lower positions of the track and the melting furnace side The rewinding machine moving on above, in preparation according to this Metal furnace of the present invention as well as the transfer of the shape only in a reciprocating direction of the raw material for the preparation of low equipment cost reduction furnace side of the melting furnace vessel. This metal chain device has a shape. The way is set so that the take-up opening &amp; side is equipped with a preparatory february to fix the square bucket, and the container is transferred between the above-mentioned road = the original furnace melting furnace. In ancient times, since the self-reduction can be reduced to k quickly and efficiently, it is: out; no blocking, and because of the coiler type, compared with conventional equipment, it can be lowered, and various types described below can be used. In the second preferred metal chain equipment, it has a dissolving furnace and two preliminary reduction furnaces. The containers on the sides of the two preliminary reduction furnaces are rolled up, and the raw material receiving hopper or the raw material receiving hopper is on the melting furnace side. On both sides of it. Position (2) In the above-mentioned metal chain equipment, the position of the container roll on the side of the preliminary reduction furnace is provided in a pair with one preliminary reduction furnace. (3) In the above-mentioned metal chain equipment, the raw material feed-out part of the preliminary reduction furnace can place a plurality of containers, and it is provided with a plurality of containers that can be sequentially moved to the preliminary reduction furnace by the rotation of the table. Rotary table for raw material feed-out position and container roll up position. ° (4) In the above-mentioned metal chain equipment, the melting furnace is a metal bath type melting and reducing furnace. (5) In the metal chain equipment of the above (4), the container is wound by a coiler

477817 V. Description of the invention (145) The driving mechanism on the coil is provided with a hoisting wheel Sai &amp; Sa2 set at both ends of the length direction of the track of the coiler, and a parent set on the coiler. The viewing wheel Sb is set on a winch wheel Sc suspended from a container suspension mechanism that can be lifted from the above-mentioned coiler, and the reel Da is wound with a twisted cable on a container coil positioned below the track of the above-mentioned coiler Da. It is released from the stranded cable winding drum Da, and is guided to the stranded wheels, and the front end is fixed on the container roll on one end side of the track with a stranded cable Wa, which is derived from the stranded wheel Sai 4Sa2. The stranded cable Wa is sequentially guided to the stranded cable pulley Sb of the coiler, the stranded cable pulley Sc of the container suspension mechanism, and the stranded cable pulley Sb on the coiler, and then guided to the stranded cable pulley Sa2. On the Sai side, the above-mentioned container suspension mechanism is suspended by the stranded cable Wa, and the above-mentioned container suspension mechanism is lifted by the winding and unwinding of the stranded cable Wa using the stranded cable winding drum Da. (7) In the metal chain equipment of the above (6), further comprising: a stranded cable take-up reel j) b provided for a counterweight coaxial with the stranded cable take-up reel Da); On Db, the winding direction is reversed relative to the winding direction of the stranded cable Wa of the above-mentioned stranded cable reel j) a, and the stranded cable pulley is positioned above the stranded cable reel Da above the stranded cable winding drum Da. Guided stranded cable Wb; and counterweight Co installed on the stranded cable ... at the front end. (8) In the metal chain equipment of the above (7), the stranded cable sheaves provided at both ends in the longitudinal direction of the coiler track and 37. The stranded cable sheave Sb provided on the coiler: provided in the container Hanger cable Sc of the suspension mechanism, the reel Da is wound on the container with a twisted cable, the reel Dashan is used on a counterweight, and the twisted cable is used on the container. A pair of the twisted cable wb of Db and the counterweight Co installed at the front end of the twisted cable are respectively provided.

Page 151 477817

V. Description of the invention (146) The metal chain equipment according to the above (1) to (3), in particular, can carry out the raw materials from the preliminary reduction furnace to the container of the dissolution furnace, and is particularly fast and efficient to implement. Furthermore, according to the metal chain equipment of the above (6) to (8), instead of setting the driving mechanism for the winding of the container on the coiler itself, the winding of the container can be performed quickly and efficiently. Lighten the coiler and reduce the volume of the drive mechanism for the container roll. This level can also reduce the equipment. Figure 6 3 ~ Figure 5 shows an implementation of the chain-making equipment of the present invention. Form, the chain-making equipment of this embodiment has two preliminary reduction furnaces 11 Oa, 1 1 Ob, a melting furnace 111, and transport containers between the preliminary reduction furnaces 110a, 110b and the melting furnace 111 [ Transport Equipment VI. In addition, in the following description, "a chain-making facility for preparing and reducing-smelting iron ore (powder ore) as a metal oxide and / or metal hydroxide is described as an example. At least part of the two stone and carbon furnaces. Each preparation is covered by the revolving hearth section, and a burner is used at the periphery of the furnace) &lt; material loading section, the preliminary reduction furnace 11 〇a, 11 h, and the general office # ,, i, 11 u D ′ are provided for installation The iron ore is fed to at least iron ore raw materials, and the iron ore is sub-cooked I, Luodian, 'J μ top preparation reduction (usually, the metalization preparation side of iron ore; 5 &amp; & &gt;, ... ,,, Λ has the original furnace body of the rotary hearth-type preliminary reduction reduction furnace 110. The & ^ d: ^ ^ system consists of a soil-shaped rotary hearth and the whole of the rotary hearth. The wall of the milk neon in the I-shaped furnace is composed of, for example, the true μ, ^, and 1 are turned in the direction. Above the wall of the furnace, there is a macro-separation over the entire length, and ^ &gt; heating burners are set at intervals (combustibly loaded with the raw materials to be reduced for a period of time,

477817

It is fed from the raw material feed section 11 3 (raw material feed port). A capacity is set in the vicinity of the above-mentioned raw material feed-out section 113. In this embodiment, each raw material feed-out section 113 is divided into two positions, and positions X and Y are wound on the roll. Moreover, in this embodiment, there is a turntable 114 'this turntable &quot; 4Π :: 1? C' before two troughs, and a plurality of containers c can be prepared through the table X. The position of the raw material feed-out part 113 of the Y reduction furnace and the position on the container roll are described in advance. The melting furnace ill is a furnace for melting and final reduction of the original iron ore by the preliminary reduction furnaces u0a and n0b. The two raw materials from the raw materials of the hemorrhoids of the reduction furnace 110a and UOb plus m ^ ^ ^ 1UD receive the hoppers 15a and 115b. The raw materials in this special material receiving hopper U5a, U5b (mainly the pre-reduced iron ore) are loaded into the melting furnace 111 through the storage tank 122 ° The above-mentioned pre-reduction furnace 11 〇a ,: 1 丨 0b and melting furnace 丨 丨】 The configuration relationship is that the positions χ and γ of the container rolls on the sides of the two preliminary reduction furnaces 110a and UOb are centered on both sides of the melting furnace side = raw material receiving hopper 115a and U5b. The above-mentioned conveying device 1 1 2 is provided with a structure laid on the chain-making equipment 丨 丨 6 on the upper part of the track 117 (walking part) and a coiler 8 which is self-propelled on the track 117; the coiler 118 The container c is wound up and travels on the rail 117, thereby carrying the container C. In the device of the present invention, the 'coiler 丨 i 8 is set to reciprocate in one direction on the track ii 7, and directly below the road 丨 7, the above-mentioned preliminary reduction furnaces 110 a and 110 b are arranged. Position χ, γ on container roll and lu side of melting furnace 477817

The raw materials receive hopper 115 &amp;, n5b. With this configuration, one coiler 丨 8 is on the track 丨 丨 7 can only reciprocate in one direction, and the raw material receiving hoppers of the reduction furnaces 11 0 a, 11 〇b and the dissolution furnace 1 11 The transfer of container C between 1153 and 11b can be performed quickly in a short time. Also, as in this embodiment, two pre-reduction furnaces 丨 0 a, 1 丨 0b and: two dissolution furnaces are set to the capacity of the two pre-reduction furnaces 110 a and 110 b, and the position X on the roll , Γ The arrangement relationship of the raw material receiving hoppers on the 11 i side of the melting furnace 5a, 115b is located on both sides of the melting center, and the track U7 of the winding machine ιΐ8 is set to the above-mentioned form, thereby the self-reduction Furnace 10a, the raw materials (containers) fed out are effectively conveyed to the melting furnace side by a coiler 118. Furthermore, in this embodiment, the raw material feed-out portions 113 of the preliminary reduction furnaces 11a and 11b are provided with two container roll-up positions χ and γ, respectively, and each raw material feed-out portion 113 is provided in advance. There is a turntable 114. This turntable 114 can sequentially move the plurality of containers C placed on the table to the position of the raw material feed-out portion 113 of the preliminary reduction furnace and the above-mentioned container roll position χ, γ. Therefore, The raw materials in the preliminary reduction furnace can be fed out to the container c, and the container c can be taken up and transported by the coiler 118, which can be carried out with high efficiency, such as this, from the preliminary reduction furnace 110a. The feed of raw materials of ll0b will not be blocked. Figs. 66 to 68 are preferred examples of container c of the coiler 118 in the apparatus of this embodiment. In this example, two vessels C are used for each preliminary reduction furnace. In these figures, χ and γ of [la] represent the preliminary reduction furnace 11 (the position X and γ on the container roll on the ^ side, and [lb] iX and γ represent the preliminary reduction furnace

477817

Positions χ and γ on the container roll on the side of 11 0 b. First, in FIG. 66 (a), the container dipper system on the side of the preliminary reduction furnace u0b is on the raw material receiving position on the raw material receiving hopper 11 5b. From this state, the preliminary reduction furnace is rolled by the coiler 118. 1 The volume C! At position 上 on the container roll on the side of 〇a is transported to the raw material receiving hopper 丨〗 for raw material feeding. Then, as shown in FIG. 66 (b), the empty container C3 on the raw material receiving hopper U5b is conveyed by the winder 11 to the position X on the container roll on the side of the preliminary reduction furnace. This-after the container C3 is transported ', as shown in FIG. 66 (c), the rotary table 114 on the Ob side of the preliminary reduction furnace 11 is rotated, so that the container knife is positioned on the container roll, and the valley is C4. The coiler 11 8 It is rolled up and transported to the raw material receiving 11 5 b for raw material feeding. Next, as shown in FIG. 67 (d), the empty container q on the raw material receiving material U5a is transported by the coiler 118 to the container on the side of the preliminary reduction furnace u0a ^ After this container q is transported, such as As shown in Fig. 67 (e), the rotary table H4 on the side of the pre-reduction furnace 110a is rotated to place the container q on the container roll position y, and this container C2 is wound on the coiler 118 and transported to the raw material carrier. The bucket 11 5 a feeds the raw materials. Next, as shown in Fig. 67 (f), the empty container C4 on the raw material receiving hopper n5b is conveyed by the coiler 118 to the position y on the container on the side of the preliminary reduction furnace uOb. After this container C4 is transported, as shown in Fig. 68 (g), the turntable 114 on the side of the preliminary reduction furnace 110b is rotated, so that the container knife is positioned on the container roll.

477817

Then, it is transported to the raw material receiving material x, and this one container C3 is rolled up by a coiler 11 8 into a bucket 1 1 5 b to feed out the raw material. Next, as shown in Fig. 68 (h), the container C2 on the raw material receiving hopper U5a is transported to the container | on the side of the preliminary reduction furnace 丨 丨 a by the winder 1 18 to the position y. Then, after this container C2 is transported, as shown in FIG. 68 (i), the turntable 11 4 on the side of the preliminary reduction furnace 11 0 a is rotated, so that the container Ci is located at the container roll position X again, and this container G is wound on a coiler 118, and is conveyed to a raw material receiving hopper 115a, where the raw material is fed out. By repeating the above procedure ^

A total of four containers are sequentially transported, and the raw materials are transferred from the preliminary reduction furnace to the melting plutonium. | As mentioned above, by setting positions X and y on the container rolls of the two positions on the side of the pre-reduction furnaces 丨 丨 〇a and 丨 丨 b, respectively, using two containers c each for transportation in accordance with the above procedures, The moving distance of the coiler 118 can be minimized, and it can be transported as an efficient container. Moreover, in this embodiment, the driving device for rolling up the container C by the winding machine 118 is not the winding machine 118, but a winding drum (winding winch) provided at an appropriate position on the ground or the structure 116. ), And its driving mechanism is equipped with a counterweight mechanism.

Fig. 65 is a detailed configuration of a driving mechanism for winding the container c by a coiler 8 in the present embodiment. This driving mechanism has: winch wheels Sai and Sa2 provided at both ends of the length direction of the track 117 of the coiler 118, and winch wheels Sb provided on the coiler 118, which are set to be suspended. Container suspension mechanism raised and lowered from the above coiler 11 8 丨 9 (with hooks connected to the container

Page 156, 477817 5. The winding wheel Sc of the invention description (151)) is located at a lower position (above the ground or the appropriate position of the structure 丨 丨 6) than the above-mentioned winding machine 1 1 8's guide 1 1 7 The reel Da is wound on the container roll with a twist gauge, and the counterweight reel Db 'provided with the weight coaxial with the twisted cable reel Da is released from the above-mentioned reel reel Da and is guided to Each of the above-mentioned stranded cable pulleys is fixed at the front end. 20 The stranded cable Wa used for the container roll at the end side of the above-mentioned track 117 is wound on the stranded cable reel Db. The reel Wb guided by the winch wheel Sd provided at the upper position of the cable take-up reel Db, and the counterweight Co provided at the front end of the winch wb. The above-mentioned stranded cable Wa, which is derived from the above-mentioned stranded wheel Sa! 4Sa2, is sequentially guided to the above-mentioned stranded wheel Sb on the winding machine 118, the above-mentioned stranding wheel Sc of the container suspension mechanism 11 9 and the winding machine 118. After the aforementioned thinning wheel Sb, the container suspension mechanism 丨 19 is suspended by the stranded cable Wa by leading to the above-mentioned stranded wheels Sag and Sai, and the winding drum D a Twisting, unwinding, winding and unwinding 'make the above container suspension mechanism lift 119 people. The twisted mirror wheel Sb guides two twisted cables Wa. The stranded cable Wb with the counterweight c0 is wound with respect to the stranded cable take-up reel Da in such a manner as to be reversed from the winding direction of the stranded cable Wa with respect to the stranded cable take-up reel Da. direction. With such a drive mechanism, even if the drive mechanism for the container roll is not provided on the winder 118, it can still be used to roll the container, and has the advantage of reducing the weight of the winder 118. In addition, by providing a counterweight mechanism, the load acting on the take-up reel Da can be reduced by reducing the weight of the container, so that the volume of the winch used for winding can be reduced. In this embodiment, the respective components of the aforementioned drive mechanism, that is, the

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 157 477817 V. Description of the invention (152) The winch wheels Sa1 and Sa2 set at the two ends of the length direction 117 of the winding path 118 and 117 are set at The winch Sb on the winder 118, the winch Sc provided on the container suspension mechanism 119, the reel Da on the container reel, the reel Db on the reel, and the reel Db on the container. A pair of the twisted cable Wa, the twisted cable Wb wound around the twisted cable take-up reel Db, and the counterweight Co installed at the front end of the twisted cable Wb are provided. In other drawings, 121 series winches are used for winding. The above is a description of the chain-making equipment of the present invention, taking a device having two preliminary reduction furnaces 11 0 a, 11 0 b, and a melting furnace 111 as an example, but the number of the preliminary reduction furnace or the melting furnace can be set to any number Only one reduction furnace can be used. Also, the rotary table 114 of the above embodiment can be placed in three positions of three containers C. However, it is also possible to set two positions of the container rolls X and y to the same position. The two containers C are placed in a two-position type in a relationship of 180 °. The iron-based mixtures that have been charged in the general system will be mixed with other iron mixtures for reduction. The above-mentioned rotary hearth material (usually coal) of the system, or the raw materials of such mixtures can also be source or auxiliary materials. ' Carbon materials are fed into a sub-furnace with different raw materials and fed to a container. The powdery granular mixture consisting of the metal chain equipment and iron ore (powder ore) described above is pelletized or agglomerated. , But mixed with carbon materials and raw materials other than iron ore (which is also 'preparation reduction furnace can be loaded with the above raw materials and heat treatment. Therefore, in the case of pre-mixed with other raw materials other than iron ore The raw materials that are fed to the melting furnace to accept the hopper and transport the raw materials between the preliminary reduction furnace and the melting furnace are not specifically limited in the form of the melting furnace.

5. The occasion of invention description (153). : From the viewpoint of θ ϋ 1 ™, the rate of discharge, and the amount of energy to be balanced, it is best to use the heat of combustion and the furnace of the carbon material Internal research: The original melting furnace Γ ^ ^ f of the original t requires a heat source for the decontamination of the iron ore and the final reduction furnace, but it is not a representative example of the decontamination furnace, which can be returned by metal melting Type bitch. :: Can it be done? Some of the heat sources use electric power, and other electric power is lost. You can also use a cast iron furnace or an electric cast iron furnace, or a carbon material supply device and oxygen (or air) to blow through the equipment, thereby reducing the input power. Type of stove and so on. The i of the phantom enters ^: with: etc;: r, in addition to the raw materials * from the preliminary reduction furnace * are ^ materials, but also supply carbon materials through appropriate supply mechanisms (mainly electric cast iron furnace or electrical cast iron furnace Other self-supplied Nanshan electrodes, so it has the advantage of having a high degree of freedom in the distribution of the raw material receiving hopper, which is advantageous in the application of the present invention. There are no restrictions on the form of the pre-reduction furnace &quot; 〇, for example, it can make Multi-layer hearth furnace described in the chain method is used for pre-reduction furnaces such as self-rotating f-type furnaces. Raw materials used to feed from the pre-furnace furnace = down: Prevented from preliminary reduction; original; = re-emulsified and sent to the melting furnace 'should be the non-open type as described earlier, then t is in addition to the raw materials fed from the preliminary reduction furnace, and iron ore suitable for reduction Or other containers of Gyeonggi prepared by the original reduction furnace Page 159 C: \ 2D.CODE \ 90-02 \ 89118226.ptd 4 // S1 /

For example, you can enter the valley in advance, or you can feed the raw materials from the preparation reduction furnace and load them into the cries, _4 ·, β bags η ± Η η The pre-reduction furnace feeds the raw materials out of the metal oxides that are the object of the melting / reduction system. It is also possible to use iron ore as an example, but the chain-making equipment of the present invention uses other metals And / or metal nitrogen oxides, such as Ni ore, Cr ore, rib ore, and the like. [Industrial Applicability] As described above, it is useful to use metal oxide or raw-melt-final reduction to be cheaper and more productive than iron ore. The metal chain method and metal hydroxide of the present invention can produce metal smelting liquid with good energy efficiency by using coal and the like. Therefore, the ferrous metal chain equipment is manufactured with high productivity, and the carbon material is used to prepare and return the energy and energy balance. This is especially used as a method of using water. [Instruction of the component number] 1 Furnace body 2 Rotation Hearth 3 Furnace wall 4 Furnace gas exhaust 5 Raw material loading 〇6 Raw material feed-out port 7 Conveyor belt 8 Loading pipe 8a Raw material loading pipe

Chapter 160 477817

V. Description of the invention (155) 8b Carbon material loading pipe 9A Raw material loading pipe 9B Carbon material loading pipe 10 Loading pipe 10a Inner pipe 10b Outer pipe 11A Raw material loading pipe 1 IB Carbon material loading pipe 12 Nozzle 13 Blow blow nozzle 14 Blow nozzle for blowing 15 Crushing device 16 Crushing device 17 Granulator 18 RHF 19 Mixer 20 SRF 21 Heater 22 Cooling device 23 Burner 24 Powder ore 25 Coal 26 pellets Granule 27 Powder and granular mixture raw material C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 161 477817 V. Description of invention (156) 28 Fuel gas 29 Semi-reduced iron 30 Oxygen 31 Hot metal 32 Recovered gas 32a 33 Exhaust gas 34 Assistance / i %% \ With oxygen-containing gas 36 Horizontally moving hearth 37 Horizontally moving hearth 38 Conveying hearth 39a Sprocket 39b Sprocket 40 Heating burner 41 Feeding raw materials V 42 Feeding raw materials V 43 furnace Inner gas exhaust port 44 Rotary furnace body 45 Support body 46 Dosing device 47 Inner gas exhaust port 48 Original Feeding the burner heater portion 49 50 gas supply nozzle

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 162 477817 V. Description of the invention (157) 51 Gas supply head 52 Furnace 53 Furnace section 54 Falling mechanism 5 5 Heating burner 56 Raw material inlet 5 7 Furnace gas exhaust port 58 Spindle 5 9 Falling rod 60 Raw material discharge device 61 Spiral body 62 Driving device 63 Heating burner 64 Combustion blow nozzle 65 Burner 66 Air supply pipe for secondary combustion 67 Baffle plate 6 8 Twisted plate 69 Gas seal plate 70 Spiral device 71 Spiral body 72 Spiral device 73 Exhaust gas duct 74 Spiral body

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 163 477817

V. Description of the invention (158) 75 Hot cyclone separator 76 Venturi atomizer 77 Gas reservoir 78 Compressor for SRF gas generation 79 Compressor for combustion air 80 Piping 81 Injector 82 Gas piping 83 Control valve 84 Injector Body 85 Nozzle tube 86 Ejection tube section 87 Suction port 88 Boiler 89 High-temperature dust removal device 90 Gas piping 91 Pressure regulating valve 92 Flow regulating valve 93 Piping 94 Flow regulating valve 95 Piping 96 Measurement-control device 97 Tubular flame burner 98 Body C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 164 477817

V. Description of the invention (159) 99 Combustion chamber 100 Gas blowing inlet 101 Gas supply nozzle 102 Preheating-drying belt 103 Heating-reduction belt 104 Reduction-temperature adjustment belt 105 Heating-strong reversion belt 106 Reduction-temperature adjustment belt 107 Thermal shielding Plate 108 Partition 110a Pre-reduction furnace 110b Pre-reduction furnace 111 Melting furnace 112 Conveyor 113 Raw material feed section 114 Rotary table 115a Raw material receiving hopper 115b Raw material receiving hopper 116 Architecture 117 Track 118 Winder 120 Fixing section 121 Winch for winding A Raw material layer C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 165 477817 V. Description of the invention (160) a Powder layer b The bottom layer c The bottom layer d Powder (loaded) material e Cooling material f Burner flame C Burner Co Counterweight Da Stranded cable reel Db Stranded cable reel Sax Stranded wheel S Stranded wheel Sb Stranded wheel Sc Stranded wheel Sd Stranded wheel Wa Stranded cable Wb Stranded cable

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Page 166 477817 The diagram briefly illustrates the retention time in RHF of the raw material of the mixture composed of iron ore and broken materials, and the semi-reduced iron metal produced. Relation curve diagram. Figure 2 is a perspective view of a conventional type of RHF. FIG. 3 is an explanatory diagram of the arrangement of the raw material inlet and the raw material inlet and outlet of the RHF shown in FIG. 2. FIG. Fig. 4 is a graph showing the relationship between the metallization ratio of semi-reduced iron manufactured by RHF, and the original unit of energy consumption in the rhf_saf process 4HF-SRF process, RHF, SRF, and SAF. Fig. 5 is a graph showing the relationship between the metallization ratio of semi-reduced iron manufactured by RHF, and the cost of molten iron manufacturing in the manufacturing process and the RHF-SRF process. In the f 6 / 糸 ^ TF_SRF process, an example of energy balance is shown when the average metallization ratio of semi-reduced iron made by RHF is 30%. = 7 is a graph of an example of energy balance when the average metallization ratio of semi-reduced iron manufactured by RHF is 90% in the RHF-SRF process. Fig. 8 is a diagram showing an example of energy balance when the half-average metallization ratio produced by RHF is 90% in the RHF-SRF process. Fig. 9 is a graph showing the relationship between the average reduction rate of MF raw materials and ^, the production volume of Xie, and the amount of molten iron in SRF. f &lt; hot metal production, 0 on the figure is: average metallization rate of semi-reduced iron manufactured, amount of gas (energy conversion amount) generated by SRF, and _ or steel guard drop% gas volume (energy The conversion curve). &quot; Figure 11 shows that the gas produced in the SRF has been recovered and the preparation for exposure to the atmosphere for a certain period of time has returned to Bikinomaru.

477817 —— The diagram simply illustrates the relationship curve of the conversion rate. Fig. 12 is an explanatory diagram of a method for loading a raw material of a compound and a carbon material in the SRF, and loading the two in a mixed state while dropping in a furnace. Figure 1 3. FIG. 13 (a) is a schematic diagram of a longitudinal section of a melting furnace, which is an example of a preferred charging form of a melting furnace, a mixture of raw materials and / or carbon materials in the metal chain method of the present invention. (b) is a schematic sectional view taken along the line AA, in Fig. 13 (a). Figure 1 4. Fig. 4 (a) is a schematic view of a longitudinal section of a melting furnace, showing another example of a preferred charging form of a melting furnace, a mixture raw material and / or a carbon material in the metal chain method of the present invention. Fig. 14 (b) is a schematic sectional view taken along line b-B in Fig. 14 (a). 'Fig. 15 is an explanatory diagram of another example of the preferred charging form of the melting furnace, the mixture raw material and / or the carbon material in the metal chain method of the present invention, and Fig. 5 (a) is a longitudinal section of the melting furnace Fig. 15 (b) is a schematic sectional view taken along line ^ c in Fig. 15 (a). Figure 16 is a graph showing the relationship between the degree of gas oxidation in the atmosphere in the RHF reduction zone and the final average metallization rate of pellets manufactured with an average metallization rate of 90%. Figure 17 is a graph made using the metal of the present invention RHF of the chain method-a flowchart of one embodiment of the SRF process. Fig. 18 is a flowchart of another embodiment of supplying the SRF-generating gas and the auxiliary oxygen-containing gas to the RHF in the process of Fig. 17 Fig. 19 is an explanatory diagram (schematic sectional view) of one embodiment of the horizontal moving hearth-type preliminary reduction furnace used in the metal chain method of the present invention. C: \ 2D-CODE \ 90-02 \ 89118226. ptd Page 168

FIG. 20 is an explanatory diagram of an embodiment of the furnace in the metal chain method of the present invention (schematic cross section ^ f-type preliminary reduction) FIG. 21 is an illustration of an embodiment of the metal chain method of the present invention. (A schematic view of a two-furnace pre-furnace preparation model is a perspective view applied to the second form of the metal chain equipment of the present invention. FIG. 23 shows the arrangement of the raw material outlet of the RHF in the embodiment shown in FIG. Illustrative diagram of the raw material meter. Figure 24 is a clear picture of the configuration of the raw material inlet and the raw material inlet and outlet in the application form of the metal chain equipment of the present invention. The cargo figure 25 is applicable to the present invention. The preferred operation of the RHF 1 "^ The application form is a flat solid product in which the raw material feed-out section is shown in the state of the section of the furnace wall. The application form of the preferred operation method of the RHF of the present invention is a longitudinal sectional view of the raw material layer.

Fig. 28 is an embodiment of a preferred operation method of the RHF applicable to the present invention, and is a longitudinal sectional view of a raw material layer. FIG. 29 shows another preferred method of operation of the RHF applicable to the present invention.

The embodiment mode is an explanatory diagram of the arrangement of the raw material inlet and the raw material inlet and outlet. Fig. 30 is an explanatory view showing the state of loading the raw material from the raw material loading port in the embodiment of Fig. 29; ~ Fig. 31 of the bucket is another embodiment of the preferred method of operation of the rhf of the present invention, which is a raw material inlet, a cooling material inlet, and a raw material.

C: \ 2D-C0DE \ 90-02 \ 89118226.ptd 477817 Schematic illustration of the configuration of a port. Fig. 32 is an explanatory view showing a state in which raw materials are loaded from a raw material inlet in the embodiment of Fig. 31; Fig. 33 is an explanatory diagram of an embodiment of the metal chain method of the present invention in which an uncalcined auxiliary raw material to be charged into a melting furnace is brought into contact with a high-temperature exhaust gas discharged from a preliminary reduction and furnace and is calcined. Fig. 34 is a graph showing the relationship between the particle size, the crushing cost and the returned raw materials after the primary crushing of the sintered raw material ore used in the metal chain method (I) of the present invention. An illustration of an embodiment. Fig. 36 is a diagram illustrating another embodiment of the metal chain method (π) of the present invention. Fig. 37 is a diagram illustrating another embodiment of the metal chain method (π) of the present invention. Fig. 38 is a diagram for explaining another embodiment of the metal chain method (Π) of the present invention. Fig. 39 is a diagram illustrating another embodiment of the metal chain method (Π) of the present invention. Fig. 40 is a plan view of one embodiment of the metal chain method (III) of the present invention. Fig. 41 is a plan view of another embodiment of the metal chain method (III) of the present invention. Fig. 42 is an explanatory diagram of the twisted plate used in the embodiment of Fig. 41.

Page 170 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 Brief description of drawings Figure 43 is a plan view of another embodiment of the metal chain method (m) of the present invention. Fig. 44 is a plan view of one embodiment of the metal chain method (m) of the present invention. FIG. 45 is an explanatory diagram of a usage state of the spiral device (raw material moving-feeding device) in the embodiment of FIG. 44. FIG. &amp; Fig. 46 is an explanatory view of an embodiment of the metal chain method (VI) of the present invention. Fig. 47 is a diagram showing an example of the structure of an ejector used in the embodiment of Fig. 46. Fig. 48 is a diagram for explaining another embodiment of the metal chain method (IV) of the present invention. Fig. 49 is a perspective view showing a structural example of a tubular flame burner used as an actuator for RHF in the metal chain method (v) of the present invention. Fig. 50 is a schematic sectional view of the tubular flame burner shown in Figs. Fig. 51 is a plan view of RHF used in one embodiment of the metal chain method (v) of the present invention. Fig. 52 is an explanatory diagram of an example of the installation state of the tubular flame burner in the RHF of Fig. 51; ^ FIG. 53 is an explanatory diagram of another example of the ampere state of the tubular flame burner in the RHF of FIG. 51. ~ Fig. 54 is an explanatory diagram of another example of the installation state of the tubular flame burner in the RHF of Fig. 51. ^ Figure 5 5 is a gas reservoir for the implementation of the metal chain method (v) of the present invention

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 171 477817

C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 172

Claims (1)

/ 、 The scope of patent application includes: · Metal chain method, which is characterized by: Pre-borrowing = from one or more of the following mixture raw materials (a) ~ (c), in the + / 2 furnace, metal oxidation (A1): Preliminarily reduce carbon and metal oxides and / or metal hydroxides in such a way that the average rate of the metal and / or metal hydroxides becomes 5 to 55%. Raw materials for mixtures, (b) at least raw materials for granulating carbon materials with metal oxides and / or metal hydroxides, U) at least mixing and shaping carbon materials with metal oxides and / or metal hydroxides The raw material of the mixture obtained; and the raw material of the mixture prepared to be reduced in this step (A1) is charged into a melting furnace made of metal and mountain. In the melting furnace, a carbon material is used as a reducing material and the combustion heat of the carbon material is used. The main heat source is the combustion heat with carbon monoxide generated in the furnace, and the steps of melting and final reduction are performed (B1). …, 2 · A metal chain method, comprising: ^ a mixture raw material selected from one or more of the following (a) to (c), in a preliminary reduction furnace, a metal oxide and / Or in a way that the average metallization rate of the metal hydroxide exceeds 5%, a preliminary reduction step (A2): (a) a mixture of raw materials obtained by mixing at least a carbon material with a metal oxide and / or a metal hydroxide, (b) a mixture of raw materials obtained by mixing and granulating at least carbon materials with metal oxides and / or metal hydroxides, 477817 6. The metal oxides and / or metal hydroxides in the scope of the application for patents are housed in non-open containers or gas delivery devices that use non-oxidizing gas as the transport gas, and are transferred to the dissolution using the thawing benefit or gas delivery device. Furnace 'and dissolve it in the melt 6. If the metal chain method of item 丨 or 2 of the scope of patent application is applied, the secondary combustion rate of the generated gas is above 20%, except for mixing 7. Such as application The metal chain method of item 丨 or 2 of the patent scope, in addition to the carbon materials in the raw materials of the six τ team members, and the carbon material in the melting furnace are also provided ^: The metal chain method of the scope of patent application item 7, In step ^ or step U2), the high-temperature mixture raw materials prepared in the reduction (but the metal hydroxide containing rhenium and / or rhenium in the mixture raw materials of the step oxygen) is mixed with the carbon material at the same time. f. Dissolve in the furnace, and put the mixture of raw materials and carbon materials into the furnace in a state where they are mixed with each other by at least one degree, and reach the bath surface. For the 9th office, please use the metal chain method of the patent scope item i or 2 to decompose the furnace using a metal bath type melting reduction furnace. Zhongzha is the metal chain method of fusion 1 or 2; / where the oxide layer is formed on the surface layer of the raw material particles of the compound. set? Bu here again sf 10 ^ ^ ^ ^ ^ ^ t chemical degree, is set to 3: the upper part or the atmosphere of the furnace atmosphere in the entire area of the oxygen oxygen spoon, the rolling system to supply the gas generated by the melting furnace Page 175 C: \ 2D-GODE \ 90-02 \ 89118226.ptd 6. Those who apply for patent scope. 1 3 · If you apply for the metal chain method of item 1 or 2 from the melting furnace to discharge from the melting furnace, it is the gas generated and / or supplied to the melting furnace that is ready to be returned and the temperature is less than 300 ° c. The exhaust gas that should be discharged is used for combustion-supporting oxygen-containing gas, which uses a reduction furnace obtained from the combustion of the pre-reduction furnace = a mountain, heat, and / or a melting furnace to generate gas. After the sensible heat of the gas is preheated, it is then supplied to the reserve. 1 4 · Shikou applies for 4 ^ The metal chain method of item 1 or 2 of the discharge range from the melting furnace, which is or should be supplied to the pre]], L The gas (S) and /. Steps (i) and (ii) of the melting furnace below 300 ° C are the combustion-supporting oxygen-containing gas (0) of the original furnace. Please follow the steps below: ;? Then, it is supplied to the preparation and she is preheated with the sensible heat of the exhaust gas from the step furnace which prepares and repels π / 1 body (s) and / or the above-mentioned combustion-supporting oxygen-containing gas (0) up to 500 t. (Ii) the generated gas (s) and / or combustion-supporting exhaust gas preheated by the bell and half with oxygen r (〇 ^ vstep (1)); and / or the above-mentioned generated gas (s) -Part of the income is preliminarily burned, and the sensible heat of the exhaust gas obtained by starting / burning other fuels is 15 steps such as Shen and Mann, and then the temperature is raised. Preparation V The original furnace is excluded in the month. The metal chain method of item 2 is in which the auxiliary raw materials of the melting furnace are added to the raw materials of the mixture, and at least a part of the 妁 7 is added. The preparation is also the same as the item 15 The method of chain-making, in which the loading of the auxiliary raw materials is performed in advance; =: a small part of the unfired auxiliary raw materials, which were calcined by Bell in the original furnace. Page 176 477817 丨 _ VI. Scope of patent application 1 7 · If the scope of patent application is in the metal reduction chain method, which is in the preliminary reduction furnace, and the product chain is a metal chain method, the raw materials recovered by the dream body are The use of carbon materials including the second part of the self-melting furnace, the second side of the coarse grains ::; wear = as recommended /; Λ · Lee range of the metal chain method 1 or 2, | Or form the mixture / material V, each of which constitutes at least a part of the original radon: the gas before the original branch and / or the gas from the melting furnace, which is discharged and dried. Ingenious "heat and / or latent heat, to be preheated 20 · If the preparatory reduction furnace of item 1 or 2 of the declared patent scope uses a rotary hearth type w method ', where the raw material feed is not formed as the converter bed 2 = ;; . Preparing to reduce the raw material of the mixture. 'Under θ, one side feeds from the feed inlet; the bed is about to be loaded from the original. At least one is used as a cooling material to be loaded and unloaded from the raw material and carbon material discharge device' to mix with The above-mentioned cooling J :: 'and the raw materials at the feed outlet are fed out of the furnace. The state of the material will be processed. 22. For example, the metal chain method of item 21 of the scope of patent application, where the C: \ 2D-CODE \ 90-02 \ 89118226.ptd page 177 817 VII. Application The weight ratio (A) / (β) of Fe t (A) in the cooling material in the raw material layer to the amount of Fe (B) in the raw material constituting the raw material layer is 1/10 to 1/1. 2 3 · If the metal chain method of item 1 or 2 of the scope of the patent application is applied, the uncalcined sub-original section is calcined by contacting with the high-temperature exhaust gas discharged from the pre-reduction furnace, and then calcined, and then charged for melting. Furnace. 2 4 · If you apply for a patented metal chain method around item 23, the air is preheated with the high-temperature exhaust gas used for the calcination of the uncalcined auxiliary raw materials, and this preheated air is supplied to the preliminary reduction. Furnace. 25. If the metal chain method of item 1 or 2 of the scope of patent application is applied, the secondary combustion rate of the gas generated in the melting furnace is set to more than 20%, and the gas generated in the melting furnace is supplied to the preliminary reduction furnace. As a combustion gas. 2 · If the metal chain method of item 丨 or 2 of the scope of patent application is applied, in addition to the carbon material in the raw material of the mixture, the carbon material is also supplied to the melting furnace; In addition, the following will be:]: gas generated in the melting furnace The secondary combustion rate is set to M% or more; and for those who are going to the original furnace to supply the gas generated by the decontamination furnace as the combustion gas. 27. If the metal chain method of item 1 or 2 of the scope of patent application is applied, the raw material of the mixture of the preliminary reduction furnace or before forming the raw material of the mixture: at least a part of the raw material L is discharged from the preliminary reduction furnace. Exhaust, and / or the sensible and / or latent heat of the gas generated in the melting furnace, and preheat it ^ = Set the secondary combustion rate of the gas generated in the melting furnace to 20% gas. The gas produced by the original furnace for the smelting furnace is used for combustion 28. For example, the metal chain method of item "j%" in the scope of the patent is loaded into the raw materials m, Λ, and intermediate materials of the original furnace. Or \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd before forming the mixed raw materials. Page 178 6. The scope of the patent application each constitutes at least a part of the raw materials, the occurrence of gas and / or dissolution furnace. 々The discharge drying from the preliminary reduction furnace ... Preheat the carbon material for the sensible heat and / or latent heat of the melting furnace two bodies; In addition, the occurrence of the melting furnace: 'the carbon material in the raw material of the compound is added; For the supply of the preliminary reduction furnace, the secondary combustion rate is set to 20% by gas.% Of the gas generated in the furnace is used for combustion. Chain method, in which at least a part of each constituent raw material, the gas before etching or forming the raw material of the mixture and / or the gas generated in the melting furnace ^ carbon material; in addition, the gas generated in the melting furnace π 枓: Other than the carbon material, it is also used for the box supply, Panyu # 礼 体 的The secondary combustion rate is set to more than 20%, and the molten gas is supplied to the preliminary reduction furnace; in addition, 1 is returned by the preparation; ^ The turbulent body is used as the raw material for the combustion mixture, and is contained in the confinement penalty + 疋 甲 疋 丄贪 的 奇 舻 夕 贪 ， 矣 取 ： Gu Wei or non-oxidizing gas is used to transport / use the closed container or air delivery device to protect the ^. And then transferred to the melting furnace 'and loaded The melting furnace 30. A metal chain method is characterized in that it is provided with: ^, M: two or more of the following raw materials of one or more of (a) to (C), a large preliminary reduction furnace in the Z hearth Medium 'in a way that metal oxides and / or metallized states can be prepared in steps 477817 VI. Scope of patent application (a) At least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hafnium oxide, (b) At least a carbon material with a metal oxide and / or a metal hydroxide & amp Gold and granulated mixture raw materials, (c) a mixture of at least carbon materials and metal oxides and / or metal hydroxides obtained by mixing and forming; and a mixture to be reduced by step (A) The raw materials are loaded into a melting furnace for a metal chain. In the melting furnace, a carbon material is used as a reducing material, and a carbon dioxide material is used to melt and finally reduce the carbon monoxide in the furnace. Step (B); 旻 ... In the above step (A), a rotary hearth type preliminary reduction furnace with two entrances in the circumferential direction is used, and the raw materials are sequentially charged into the mixture on the hearth through the inlet of the raw material The raw material layer of the mixed raw material loaded from the above inlet, __ until the mixed raw material is loaded on the +1 ... side raw material loading port, is prepared by; the loading type is to perform the preliminary reduction of the mixed raw material. range Item 30 is provided with two or more genus at equal intervals in Zhou Yi: the second method, in which the furnace is used for the preliminary reduction of the raw materials of the mixture, and the preliminary reduction of the inlet: a type of metal chain equipment, which is characterized by: Two or more parts are provided with one or more lingering inlets from U) to (C), and are used for loading raw materials selected from the rotary hearth-type preliminary reduction furnace plant of Shirahara for preparation and returning \ 312 \ 2d- code \ 90-02 \ 89118226.ptd Page 180 477817 VI. Scope of patent application (a) At least a raw material of a mixture obtained by mixing carbon materials with metal oxides and / or metal hydroxides, (b) At least carbon materials Raw materials of mixtures obtained by mixing and granulating with metal oxides and / or metal hydroxides, (c) raw materials of mixtures obtained by mixing and forming at least carbon materials with metal oxides and / or metal hydroxides; and The raw material of the mixture to be reduced is prepared by the preliminary reduction furnace, and the broken material is used as the reducing material, and the combustion heat of the obstructing material and the combustion heat of carbon monoxide generated in the furnace are used as the main heat sources to melt and finally reduce the metal chain melting. furnace. 33. For example, the metal chain equipment of item 32 of the scope of the patent application, which has a high-temperature exhaust gas discharged from the preliminary reduction furnace, is brought into contact with the unburned auxiliary raw materials that should be put into the melting furnace, and is used for the auxiliary auxiliary materials. Calciner for raw material calcination. &gt; 34. If the metal chain equipment of item 32 or 33 of the scope of patent application is applied, in which two or more raw material inlets of the preliminary reduction furnace are provided at slightly equal intervals in the circumferential direction. 3 5 · A metal chain method, comprising:-a mixture of one or more materials selected from the following (a) to (c), in a rotary hearth type preliminary reduction furnace, using metal oxides And / or metal nitrogen oxides in a way that the damage to the metallized state is preliminarily reduced (A): (a) until the evening, the slave material is mixed with the metal oxide and / or the metal hydroxide and Page 181 477817 VI. The raw materials of the mixture obtained from the scope of patent application: ⑻ At least the raw materials of carbon materials and metal oxides and / or granulated mixtures, the emulsion emulsions are mixed and (C) at least the carbon materials and metal oxides And / "Mixed raw materials obtained from gold forming; and milk lice compound mixing and a mixture raw material to be reduced by this step (A), a melting furnace for chain, in which carbon material is used for reduction and metal Η = and one of the carbon oxides generated in the furnace is = the source, which is the step of melting and final reduction (B); the main heat is in the above step (A), which is formed in the lowest layer of the back layer of the preliminary reduction furnace Golden eyebrows each enter the preparative reduction of compound raw materials from the bottom of the beta / bucket and human beta deer bed with the lowest amount of material and / or metal hydroxide. 36. The metal chain method according to item 35 of the scope of patent application, wherein the lowermost part of the raw material layer is a subsidiary material to be loaded into a melting furnace or a layer mainly composed of the subsidiary material. 37 · —A metal chain method, characterized in that: It comprises: a mixture raw material selected from one or more of the following (a) to (c), in a rotary hearth type preliminary reduction furnace, Preparing the reduction step in a way that a part of the metal oxide and / or metal hydroxide is in a metallized state (A): (a) At least the carbon material and the metal oxide and / or metal hydroxide The raw materials of the mixture obtained by mixing, (b) At least the carbon material is mixed with the metal oxide and / or metal hydroxide and m page 182 C: \ 2D-CODE \ 90-02 \ 89118226.ptd 477817 6. Apply for a patent (C) a mixture of raw materials obtained by mixing and forming at least a carbon material and a metal oxide and / or a metal hydroxide; and a mixture of raw materials to be reduced by the step (A), The melting furnace installed in the metal chain is used in the melting furnace. The carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat of carbon monoxide generated in the furnace are used as the main heat source for melting and final melting. Step (B) of reduction; step (A) above 'It is placed on the rotary hearth of the preliminary reduction furnace, and the powdery and granular raw materials (which are one or more materials selected from mixture raw materials, metal oxides and / or metal hydroxides, and carbon materials) are loaded and / or should be loaded The load consisting of the powder and granules of the auxiliary raw materials of the melting furnace, or the load mainly composed of the above-mentioned powdery raw materials and / or the above-mentioned auxiliary raw material powders and granules is' on the downstream side of the rotary hearth moving direction, A granulated material and / or a shaped body of the raw material of the mixture is charged on the above layer. 38. As described in item 37 of the scope of the patent application (A), the powder particles loaded on the rotary hearth ~ 10mm are 0 metal chain method, wherein the particle size of the step-shaped load is 〇. 〇 5 Step coal 39. As in the 37th or μ A ^ step of the scope of application for a patent, the metal chain method of loading a swiveler is used, where 1 is the main load. "Private Granular Pack μ Do, Department of Coal ^ 40. If the scope of the patent application is 37 or μ = step (A), put it on the rotary hearth:, of the metal chain method, the auxiliary raw materials or the unburned auxiliary raw materials \ powder-shaped loading It is not 41. Such as the applicant for the scope of patent application 37 or 38, the main body of the person. Item of metal chain method, in which C: \ 2D-C0DE \ 90-02 \ 89118226.ptd Article 183 477817 VI. In the scope of patent application (A), granulation and / or forming of the raw material mixture of the upper layer of the load placed on the rotary hearth The body is a granulated body and / or a shaped body which has not been previously dried. 4 2 · A metal chain method, comprising:-a mixture of one or more materials selected from the following (a) to (c), using a metal oxide and / or a metal in a preliminary reduction furnace; The way that a part of the hydroxide reaches the metallized cancer is to prepare the reduction step (A): (a) at least the raw material of the mixture obtained by mixing the carbon material with the metal oxide and / or the metal hydroxide , (B) at least the carbon material and the metal oxide and / or metal hydroxide are mixed and granulated, and the raw material of the mixture is paid, (c) at least the carbon material and the metal oxide and / or metal hydroxide are mixed and formed The obtained mixture raw material; and a mixture raw material prepared to be reduced in this step (A) is charged into a melting furnace for a metal chain, in which a carbon material is used as a reducing material, and the carbon material is burned Heat and the combustion heat of carbon monoxide generated in the furnace are the main heat sources, and the steps of melting and final reduction (B) are performed; and the uncalcined auxiliary raw materials to be loaded into the above melting furnace are discharged from the high temperature discharged from the preliminary reduction furnace Pre-calcined by gas contact The step (C). 43. The metal chain method according to item 42 of the patent application, wherein the air is preheated with high-temperature exhaust gas used for the calcination of auxiliary raw materials, and the preheated air is supplied to the preliminary reduction furnace. 44 · A metal chain equipment, characterized by: C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 184 477817 6. The scope of the patent application is as follows: It is used to load the mixture of one or more materials selected from the following (a) to (c) and prepare for reduction. Pre-reduction furnace: (a) at least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hafnium oxide, (b) mixing at least a carbon material with a metal oxide and / or a metal hydroxide and Granulated mixture of raw materials, (at least mixture of carbon materials and metal oxides and / or metal hydroxides mixed and formed raw materials; ^ introduction of the high-temperature exhaust gas from the preliminary reduction furnace, by Order 22: A non-calcined auxiliary raw material that should be put into a melting furnace for metal chain contact, and a calcining furnace for which the auxiliary raw material is calcined; f. A mixture of raw materials to be reduced by the preliminary reduction furnace; Based on the heat of combustion of the carbon material and the combustion of one of the carbon oxides generated in the furnace, as the main heat source, 丨 refining with metal chain for refining and final reduction 45. A metal chain method, characterized in that: : Rotary Furnace Bottom:-, the above mixture of raw materials' parts in ^^^^, thousand mobile hearth type, multi-layer hearth type or rotary rich type are part of metallized matter and / or metal hydroxide (a) To + will # from the evil way, to prepare the reduction step (A): The obtained mixed V / material is mixed with metal oxide and / or metal hydroxide and C: \ 2D-C〇DH \ 9〇.〇2 \ 89118226.ptd p.185 477817 /, patent application scope (b) at least mixing and granulating carbon materials with metal oxides and / or metal hydroxides The mixture raw material obtained, (c) a mixture raw material obtained by mixing and forming at least a carbon material with a metal oxide and / or a metal hydroxide; and a mixture raw material prepared by the step (A) to be charged into a metal A melting furnace for making f, in which the carbon material is used as the reducing material, and the burning heat of the carbon material and the combustion heat of carbon oxide generated in the furnace are used as the main heat sources to perform melting and final reduction. Step (B); ^ the metal oxide and / or metal hydroxide in the raw material of the above mixture, It refers to the ore obtained by sintering the raw material ore as the main body. a 4 6 · The metal chain method according to item 45 of the scope of patent application, wherein the particle size of the ore crushed by one person is from 0.1 to 1 mm. 4 7 · A metal chain method, comprising: 1. Preliminarily reducing a mixture raw material selected from one or more of the following (a) to (c) in a rotary hearth type or a horizontal moving hearth type In the furnace, the step of preliminarily reducing (A) in such a manner that a part of the metal oxide and / or the metal hydroxide reaches a metallized state: a (a) at least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) at least mixing and granulating a carbon material with a metal oxide and / or a metal hydroxide (C) at least the carbon material is mixed with the metal oxide and / or metal hydroxide and Chapter 186 6. The raw materials of the mixture obtained by forming the scope of the patent application; and: the melting furnace for the original chain of the mixture to be reduced in this step ⑴, in the melting furnace, the combustion heat of the Mengsi clothing carbon material and the inside of the furnace— = Perch = Plant and use this source to melt and finally reduce the steps (B) · Fire, ... ,, as the main heat loss step described in step '' When heating the mixture of raw materials, the order is to add demon ': At least one of the flame and the mixture raw material layer above ... 48 · A metal chain equipment, comprising: a rotary hearth type or a horizontal moving hearth for charging a mixture of one or more materials selected from the following U) to (c) for preliminary reduction A preliminary reduction furnace of the formula: (a) at least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) mixing at least a carbon material with a metal oxide and / or a metal hydroxide And a mixture of raw materials obtained by granulation, (c) at least a mixture of raw materials obtained by mixing and forming δ carbon material and metal oxides and / or metal hydroxides; and a mixture of raw materials to be reduced by the preliminary reduction furnace, Carbon chain as a reducing material, and the burning heat of the carbon material and the combustion heat of one of the carbon oxides generated in the furnace as the main heat source for melting and final reduction of a metal chain melting furnace; The heating burner for heating the mixture raw materials on the hearth of the reduction furnace is designed in any one of the following forms (i) to (iii) 477817 VI. The scope of the patent application is set so that the burner flame contacts at least a part of the upper layer of the raw material layer of the mixture: θ (i) the burner blowing nozzle is located below the side wall of the furnace body, (ii) the burner blow The nozzle is provided on the side wall of the furnace body, and the orientation of the burner blowing nozzle is from horizontal to downward 4 5. The range is inclined to the hearth side, and (i i i) the burner blowing nozzle is provided on the top wall in a downward direction. 4 9 · A metal chain method, comprising: 0-Preliminarily reducing a mixture raw material selected from one or more of the following (a) to (c) in a rotary hearth type or a horizontal moving hearth type In the furnace, a step of preliminary reduction is performed in such a manner that a part of the metal oxide and / or the metal hydroxide is in a metalized state (A): (a) at least the carbon material and the metal oxide and / or A raw material for a mixture obtained by mixing metal hydroxides, (b) a raw material for a mixture obtained by mixing and granulating at least a carbon material with a metal oxide and / or a metal hydroxide, (c) at least a carbon material and a metal oxide And / or a mixture raw material obtained by mixing and forming a metal hydroxide; and a mixture raw material prepared to be reduced in this step (A) is charged into a melting furnace for a metal chain, in which the As the reducing material, and taking the combustion heat of the slave material and the combustion heat of one of the carbon oxides generated in the furnace as the main heat source, the steps of melting and final reduction (8);. In the above step (A), 'will be in the preliminary reduction Mixture charged on the hearth of the hearth Raw materials are rotated and / or moved relative to the hearth during the heating-reduction process C: \ 2D-CODE \ 90-02 \ 89118226.ptd Page 188 6. Scope of Patent Application 5 0 · — 种 金属 制 # Equipped with: Lianhanbei, which is characterized in that: a mixture of one or more of the following materials (a) to (1) to be pre-reduced, and one or more of the raw materials are loaded into a reduction furnace: ', K Preparation of converter hearth type or horizontal moving hearth type ^ ^ ^ ^ ^ a / ^ 1 ^ ^% ^ ^ (b) At least the charcoal material is obtained by granulating the eight-year-old granulated charcoal material. And / or metal hydroxides are mixed and &lt; this a raw material, (c) at least the carbon material is opened and π-Α metal oxide and / or metal hydroxide are mixed and formed Raw materials for the mixture; and raw materials for the mixture to be reduced by the Hagiwara pre-reduction furnace, using carbon material as the raw material, and using the heat of combustion as the main source of combustion heat and carbon monoxide generated in the furnace … The metal chain you're melting and eventually reducing is set to return? There is a mechanism for the original mixture on the hearth. On the way to Kashihara, it is rotated and / or moved relative to the hearth Preparation for turning and / or moving: The chain method is characterized by: \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd Page 189 bucket / 7817 VI. Application scope of patent, one will be selected from more than one of the following (a) ~ (c) mixture of raw materials in a rotary furnace In bed-type, horizontally moving hearth-type, multi-layer hearth-type or rotary-rich pre-reduction furnaces, metal oxides and / or metal hydroxides are partially prepared in a metalized state. Reduction step (A): ^ (a) at least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) at least a carbon material with a metal oxide and / or a metal hydroxide Mixture raw materials obtained by mixing and granulating materials, ， mixture raw materials obtained by mixing and forming at least carbon materials and metal oxides and / or metal hydroxides; and ® mixtures to be reduced by A step (A) The raw materials are loaded into a melting furnace made of metal. In the melting furnace, the carbon material is used as the reduction #, and the combustion, heat, and carbon monoxide generated in the burning furnace are used as the main heat sources for melting and final melting. Steps of reduction (8); what are the steps? The high-temperature decontamination furnace gas that occurs in 至 is at least two; ^ 1, f is prepared by using the combustion air and / or the gas generated by the melting furnace. ^ Ejector function of the milk body, # is the heating burner of the fuel gas blown into the above-mentioned pre-selected original furnace. 53. A metal chain method, comprising: inserting one of the following (a) to (c) with a dipstick, a Japanese person such as a rotary hearth type, a horizontal Chiang Kai-shek 4, This a raw material is prepared in a pre-bored bed *, a multi-layer hearth furnace type, or a rotary rich type # ^ 4 reduction furnace in a manner in which one of the metal oxides and / or metal hydroxides is converted. Steps for restoration (A): C: \ 2D-CODE \ 90_G2 \ 89118226 · Page 190 477817 6. Scope of patent application (a) At least a raw material of a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) At least mixing a carbon material with a metal oxide and / or a metal hydroxide And granulated mixture raw materials, (c) at least a mixture raw material obtained by mixing and forming a carbon material with a metal oxide and / or a metal hydroxide; and a mixture raw material to be reduced by the step (A), Into a melting furnace for metal chains, in which the carbon material is used as the reducing material, and the combustion heat of the carbon material and the combustion heat of carbon monoxide generated in the furnace are used as the main heat source to dissolve and finally reduce Step (β); After reducing at least a part of the gas generated in the melting furnace in the above step (B) to below 800 t, the dust in the gas is recovered by a high-temperature dust removal device, and then it is heated at a high temperature. The state is supplied as a fuel gas to the heating burner of the preliminary reduction furnace. 5 4 · A metal chain method, comprising: 1. Preparing a mixed raw material selected from one or more of the following (a) to (c) in a rotary hearth type or a horizontal moving hearth type In the reduction furnace, the steps of “preliminarily reducing” are performed in such a manner that a part of the metal oxide and / or the metal hydroxide is in a metalized state (A): (a) to v And / or mixed raw materials obtained by mixing metal hydroxides, (b) to / mixed raw materials obtained by mixing and granulating carbon materials with metal oxides and / or metal hydroxides, Page 191 4/7817 6. Scope of patent application U) At least the raw material of the mixture obtained by forming carbon materials with metal oxides and / or gold; and the mixture and flattening of the lice emulsion = the raw material of the mixture prepared to be reduced by this step (A) to obtain The decontamination furnace used for the production of the smelting furnace a, the combustion heat of the material 1 and the carbon material of the Monsoon clothing and the reducing material generated in the furnace, and the source to be dissolved and finally returned; The private combustion heat is the main heat-like fire :;): iron, cry) will be pre-loaded in the original shipping original :, the medium as a heating mechanism is installed with a tube as the fuel gas S3) the gas produced by the dissolution furnace, , Mouth to the official flame burner. 55. If the gold in item 54 of the scope of patent application is applied for gas dedusting in the dissolution furnace, it will be supplied to the pre-injury return two :: Λ burner. The official flame of the w-shaped reduction furnace is: 2 :, the metal chain method of the patent scope No. 54 or 55, in which the gas generated by the melting furnace is stored in a gas reservoir, : Pipe for Pre-reduction Furnace ^ 57. A metal chain method characterized by: ^ Equipped with: One or more of the following mixtures (a) to (c) Original :: Hearth type, horizontal moving hearth Preparation of multi-layer or multi-layer hearth furnace, in order to prepare metal oxides and / or metal hydroxides in a state where the metal oxides and / or metal hydroxides are in a state of eight, the steps of pre-reduction are :), Yan π (a ) At least a mixture of carbon materials and metal oxides and / or metal hydroxides, and (b) at least carbon materials and metal oxides and / or metal hydroxides, and \\ 312 \ 2d-code \ 90-02 \ 89l18226.ptd Page 192 477817 VI. The mixture of raw materials and granules obtained by applying for a patent scope of granulation, + (㈠to / will only be used with metal oxides and / or metal hydrogen The raw materials of the mixture obtained by mixing and forming the oxides and 铗 3 Application: 3 3 Step: (A) The raw materials of the mixture to be reduced are charged into the corner furnace for metal chains. In this melting furnace, carbon = material : The combustion heat and the combustion heat generated in the furnace-the main source of the combustion of carbon oxide, the step of melting and final reduction (B); 疋, the main step is to heat the above step (A) into the preliminary reduction furnace After the material is pre-heated and dried with pre-heating gas, it is added to the raw material-reducer 58. The metal chain method of item 57 in the patent scope, please prepare the raw material f ^ I / q F in the reduction furnace. ^ T is the gas exhausted from this compound raw material by the above-mentioned preheating-reduction-reduction zone. The heating from the pre-reduction furnace-the oxygen-containing gas. Pre-heating combustion-assistance 60 · If the temperature of the pre-heating gas in item 57 or 58 of the patent application is 100 ~ 400 t. In this 6 1 · A metal chain method, characterized in that it has: ^ a pre-reduced second substance selected from one of the following (a) to (c) in a rotary hearth type or a horizontal moving hearth type Raw materials, in the part of the compound and / or metal hydroxide, the metal is in a state of metallization with metal oxygen. \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd Page 193 477817 VI. Step of applying for patent scope formula and pre-reduction step (A): = m is the raw material of the mixture passed by mixing λ material with metal oxide and / 5 metal hydroxide, 乂 b) /-Major carbon popularity and metal oxide And / or metal hydroxides are mixed and granulated, and the raw materials of the mixture, and 2) the raw materials of the mixture obtained by mixing and forming human materials with metal oxides and / or metal hydroxides; and: A) The raw material of the mixture to be reduced is put into a melting furnace for metal chain. In the melting furnace, carbon material is used for reduction, and the material: combustion heat and inside the furnace: combustion heat of carbon monoxide occurs. As the main heat source, the steps of melting and final reduction (B); In the above step (i), when the raw material containing the mixture raw material and / or the carbon material is poured into the bath of the melting furnace, the raw material is charged into the bath surface area of the slag bath where a downflow is generated. 6 2 · A metal chain equipment, comprising: ^ a preliminary reduction furnace for charging one or more mixture raw materials selected from the following (a) to (c) for preliminary reduction: (a) at least A raw material for a mixture obtained by mixing a carbon material with a metal oxide and / or a metal hydroxide, (b) a raw material for a mixture obtained by mixing and granulating at least a carbon material with a metal oxide and / or a metal hydroxide, (c ) At least a raw material of a mixture obtained by mixing and forming a carbon material with a metal oxide and / or a metal hydroxide; Page 194 477817 VI. Scope of patent application _ Melting furnace for metal chains will use the above-mentioned preliminary mixture raw materials, carbon material as the reducing material, and the carbon oxide combustion occurring in the g ^ furnace to prepare the reduction-the combustion of carbon oxide is Mainly; the combustion heat of the material and the final reduction of the furnace; and / or the raw materials to be melted and transported, which will contain the raw materials from the above-mentioned preliminary reducer and transported to the melting furnace to receive the raw materials from the hopper wind shell. The melting furnace has materials for receiving one or two or more raw materials from the preliminaries mentioned above: ,, f: The original materials are delivered by rolling the above container and the above transportation equipment on the road; "Go away" and the volume of the coil of the coiler is set to make the coil move. Just below the rail is a pre-preparation == two reciprocating in the same direction with the raw material receiving hopper on the melting furnace side. 、 Dream = the coiler on the container roll position, move between the pre-reduction furnace-smelting furnace by ^ Rongshang crying on the road 63. For example, the metal of the scope of the patent application No. 62 ^ a melting furnace And two ready to restore · The position on the roll of eight-eight-piece utensils is centered on the capacity hopper group on the original furnace side of the dissolving furnace side, which is located on its two original shake receiving hoppers or raw material receiving ^ words such as the application of the patent scope 62 Chain equipment, 1 middle order prepared to meet the container on the side of the original furnace roll up position, tie /, 4 pre-pair.糸 Compared to a preliminary reduction furnace ^ If the metal chain equipment of the scope of patent application No. 62, the raw material feed-out section of the preliminary return furnace can hold a plurality of containers, and the rotation of the table will place a plurality of containers Crying again, there is a biting spirit ☆ Yi sequentially moved to the original reduction furnace page 195 \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd 11, the patent application scope of material 3 out of two positions and the container roll position 66. Such as the application of the scope of the patent application of 62 ^ conversion system Xuan. The melting furnace is a metal bath type smelting reduction furnace. &amp; It is a clothing chain equipment, in which the melting 67. The driving mechanism for rolling up the container with a coiling machine such as the application of the scope of the patent No. 62 is a metal chain-equipment, wherein the profit is not in the above coiling machine. Zhi | Nine-way alternative /, · and Sa2, and the skein wheel sai 5 at the two ends of the direction, and the winch wheel Sb on the above winder, wheel s: can be taken from the above when suspended The hoisting mechanism of the container suspension mechanism of the machine lifter. The coiler's guide is set on the container roll at the lower position. The roll is taken with Da. 1 The above-mentioned winch roll Da is released and guided to each of the above. The winch is round, and it is a twisted cable Wa fixed on the container roll on one end side of the aisle. The winch ^ Wa, which is derived from the winch Sa !, is sequentially guided to the winch of the coiler. After the wheel Sb, the above-mentioned winch wheel Sc of the container suspension mechanism, and the above-mentioned winch wheel Sb on the winder, the container suspension mechanism is guided by the stranded cable wa by leading to the above-mentioned strand wheels Sa2 and Sa! The container suspension mechanism lifts the container suspension mechanism by winding and unwinding the stranded cable wa of the winding reel Da. 68. The metal chain equipment according to item 67 of the application for a patent, which includes: a coaxial cable take-up reel Da and a cable take-up reel Db; \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd Page 196 477817 VI. The scope of patent application is on the above-mentioned stranded cable reel]) b, and the stranded cable is wound relative to the above-mentioned stranded cable Da. The winding direction of Wa is reversed, and is wound by a stranded wheel M guided by a stranded wheel set above the stranded cable winding drum Da; and installed at the front end of the stranded cable Wb. Counterweight Co. 6 9 · The metal chain equipment according to item 68 of the scope of patent application, wherein the winch cable Sai &amp; Sa2 provided on both ends in the length direction of the coiler track, and the winch cable Sb provided on the coiler The hoisting wheel Sc provided on the container suspension mechanism, the reel Da is wound with a twisted cable on the container coil, the reel Da reel with a twisted cable for the counterweight, the gauge W a on the container coil, and the coil is wound on the above [Reeling reel]] b The twisted cable W b and the counterweight C 0 ′ installed in front of the twisted and reel W b are provided respectively. Page 197 \\ 312 \ 2d-code \ 90-02 \ 89118226.ptd