TW530090B - Method for producing a metal melt and multi-functional lance for use in that method - Google Patents

Abstract

The invention relates to a method for producing a metal melt in a metallurgical vessel, feed substances which contain metals and/or metal oxides, being charged in solid and, if appropriate, molten form into the metallurgical vessel, the main part of the energy necessary for the melting and, if appropriate, finish-reduction of the feed substances being applied electrically and/or by the combustion and/or gasification of carbon-containing materials. The invention relates, further, to a multi-functional lance for use in a method according to the invention.

Description

530090 Λ7 _____ B7—_ V. Description of the invention (f) The present invention relates to a method for manufacturing a molten metal in a metallurgical vessel, especially a subway or a molten steel, a feed material, including metal and / or metal The oxides are fed into the metallurgical vessel in solid form or in molten form. The essential energy required for the melt and the complete reduction of the feed material are applied electrically and / or by burning and / or vaporizing the carbonaceous material. The present invention further relates to a multifunctional nozzle used in the present invention. EP 0 257 450 A2 proposes a method for increasing the energy introduction and saving the current in the arc furnace. In this case, 'a free oxygen beam from the furnace opening device was used for the combustion of the exhaust gas from the electric furnace and the bottom nozzle was used to move the cell. The coal used to form CO is burned by a hollow electrode or a bottom tank nozzle and the oxygen used to form CO is also replenished to the melt through the bottom tank nozzle. From the standpoint of coal combustion, carbon monoxide formation and post-combustion, the disadvantage is the barrel expenditure. Furthermore, the oxygen-laden bottom nozzle is exposed to high abrasion and therefore has only a short service life. There are also many attempted manufacturing devices and methods available for heating and combustion in metallurgical reactors for metallurgical purposes. Therefore, British Patent No. 1,015,581 discloses that the burner has an intermediate oxygen pipe, a combustion supplement pipe surrounding the oxygen pipe, and an external annular pipe for oxygen. After leaving by individual nozzles, fuel and oxygen are immediately mixed. According to the British patent, a 015,581 'burner is provided for use in all top agitated oxygen steelmaking processes. However, this type of burner is not suitable for inhaling the blast furnace gas used for post-combustion, so this type of burner does not contribute or has only some to improve energy. This paper size is applicable to China S Standard (CNS) A4 specification (210 x 7 Mm) rtf first read the > i intentions on the back and then fill out this page} a 5, * -I nn H ϋ n ammamm I nnn If n Is nn _ 530090 A / ____B7 · __ 5. Description of the invention (/) Balance . 402,963B describes fuel combustion by specially designed burners. As a result of the rapid and dense rotation of the fuel and oxygen in the combustor of the burner, the outward flowing mixture quickly becomes considerably lower over the distance traveled by the mixed jet. This type of burner therefore has a fairly short flame length and in this case neglects the inhalation of blast furnace gas, so this can contribute very little to improve energy balance. Furthermore, this type of burner is only suitable for the refining of molten steel to a limited extent. WO 91/00386 discloses a method and device for heating a metallurgical furnace, an internal oxygen conduit encircled by a fuel conduit. In this case, the fuel was replenished with an inert gas to slowly lower the carrier gas. Here, it is not possible to inhale the exhaust gas into the combustion injector or use it for refining the melt to give the blast furnace exhaust gas after combustion. The purpose of the present invention is to provide a method and a device for use in such a method, and to avoid the disadvantages known in the prior art. In particular, a method is provided, which requires less electrical energy and petrochemical energy in known methods in order to make a metal melt and can be performed in a short time and a multifunctional nozzle is provided, which can be provided by the method of the present invention. It is carried out and is kept tight and simple from a structural point of view, and can again be quickly and easily repaired when maintenance is necessary. This object is achieved according to the invention by a combination of the following features: A) In the combustion step, additional energy is supplemented to the feed material, which is achieved by the use of gaseous and / or liquid carbonaceous materials and oxygen-containing gases. Blow-in and combustion, and the blow-in takes place in the form of one or more multi-function nozzles. __ 4 The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm). (Please read the precautions on the back before filling out this page) · H 1_ · nmn (i port, μ · * ·· an ····· * w · · Tong n 530090 A7 _B7________ V. Description of the invention (>) B) In the cutting and melting steps, the solid feed material is cut and partially melted by intensified blowing of an oxygen-containing gas, and the blowing takes place in the form of one or more multifunctional nozzles C) In the refining step, the melted feed material is refined by intensified blowing of an oxygen-containing gas, and the blowing takes place in the form of one or more multifunctional nozzles, D) In the carbon blowing step, alloyed carbon and / or additional energy is replenished to the feed material It is caused by the blowing in of fine-grained and / or dust-like solid carbonaceous materials and, if appropriate, burning, and this blowing in takes place in the form of one or more multifunctional nozzles E) after In the combustion step, the exhaust gas from the metallurgical container is post-combusted, which is post-combusted by blowing oxygen-containing gas into the exhaust space of the metallurgical container, and the blowing is performed by means of one or more multifunctional nozzles. Occurs and is directed away from individual multifunctional nozzles in at least two of the three spatial directions, F) during the solid blowing step, the necessary material is replenished to the feed material by means of fine grains and / or The blowing of dust-like solid particles and / or alloying agents, which takes place in the form of one or more multifunctional nozzles, in order to achieve the desired composition of the molten metal, depending on the composition of the feed material and And the desired molten metal composition, steps A) to F) are selectively implemented in any desired combination, particularly in a continuous and / or reverse order and / or simultaneously and / or omission of steps) to F) Way of individual steps. With the advantages of the method of the present invention, the molten metal can be used in electric furnaces or converters ^ Paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 ------- (Please read the precautions on the back before filling this page ) ^^ 1 ϋ na ^ fl It— 1 ^ 1 A mouthful of VI mm · Maw wii · μμμ mm mm 530090 A7 B7 V. Description of the invention (today) or completely melt the vaporizer or specifically manufactured in a way that saves energy and time. Furthermore, a ladle or container for slag conversion. The multifunctional nozzle used in the method of the present invention makes it possible to flexibly implement individual method steps, freely selected and simultaneously possible. For the manufacture of molten materials, especially steel The use of solid metal supports of molten materials has increased because these materials are already metallic and are no longer reduced at high cost. Such solid metal supports are therefore recycled to an increasing degree. In particular, such materials , Scrap, pig iron, cast iron, etc. are processed in the electric furnace, so that it is particularly important to improve the operation of the electric furnace. Fast and complete melting and refining to set the short blast furnace cycle time It is important to achieve low heat loss and electrode consumption, and to the uninterrupted feed of modern continuous foundries. Furthermore, the melting capacity of electric furnaces has also been increased due to the controlled parallel introduction of electrical and petrochemical energy. These The requirements are met by the method of the present invention. According to the features of the method of the present invention, one or more multifunctional nozzles are connected to the burner and / or refining nozzle and / or the post-combustion nozzle and / or the bottom nozzle of the electric furnace and / Or the side nozzles of the hollow electrode and / or converter are used in combination, each of which is well known. Burners and / or refining nozzles and / or post-combustion nozzle covers, "base load" relative to method steps and, Energy is introduced, melting is carried out, refining is carried out, coal and / or blown alloy agents, exhaust gas after-burning, etc. are used in particularly important locations by multifunctional nozzles or additionally to achieve fast methods For the purpose of flow. In a further embodiment of the present invention, in the solid blowing step, one or more _________ 6_____ ί, the paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 (%) (Please read the precautions on the back before filling this page) Order --------- Line 1 · 530090 A7 _________B7__ 5. Description of the invention ($) The following substances are blown into this part or completely melted into Substances: metal minerals, such as chrome ore, nickel ore and manganese ore, metal oxides such as nickel oxide, oxide and chromium oxide, iron carbide, carbide, aluminum, FeSi, FeCr, FeMn, oily scale, slag, melt Slag formers, dust from dust removal systems, honing dust, metal wafers, deoxidizers, debris, lime, coal, coke and sponge iron, appear in each case as fine grains and / or similar dust. If several substances are blown in, these are mixed or separately blown in. Partially or completely molten feed material is blown in. When metal ores and / or metal oxides are blown in together with the deoxidizing agent, the introduction of the substance mixture has subsequent advantages. Preferably, in the post-combustion step, the blowing of the oxygen-containing gas occurs in a periodic vibration and / or pulsation manner. As a result, the post-combustion of the exhaust gas from the metallurgical vessel can be carried out particularly effectively, so that the energy released at the same time is transferred to the feed material with high efficiency without loss to the exhaust system, which uniformly reduces the heat load. According to a further embodiment of the method of the present invention, in the carbon blowing step and / or the solid blowing step in the electric furnace, the beam from the multifunctional nozzle is directed into the vicinity of the impact point or into the solid material impact point, the solid material of which It is added to the melt through the thin tube of the electric furnace top or the arc of the melt. 1 According to a good embodiment, in the carbon blowing step and / or the solid blowing step of the converter, the beam from the multifunctional nozzle is guided near the impact point or into the impact point of the oxygen beam, and the oxygen is injected. The size of another spray-coating paper from the melt is applicable to the Chinese national standard (C ^ A4 specification (21〇x-(Please read the precautions on the back before filling in this page)) Line——i 530090 A7 _____B7______ 5. Description of the Invention (b) Pipe or side nozzle. The above two embodiments are particularly effective, when a large amount of ore, Ni0, oxidized powder and dust must be reduced, which is in each It can also be mixed with coal in the case. The reduction and melting of the feed material is accelerated by carbon introduction at the point where the maximum supplementary energy occurs simultaneously. According to a particularly effective feature of the invention, one or more method steps A, B, C, D, E, and F are implemented substantially simultaneously with the refining step by a multifunctional nozzle, and in particular, a combustion step is performed simultaneously with the refining step. "Essentially" means at least two method steps Partial time overlap. Except oxygen In addition to intensive blowing, as a result of the refining of the molten feed material, liquid and / or gaseous carbonaceous and oxygen-containing substances are burned. According to a further advantage of the method of the invention, a low-carbon component is produced in the refining step. During the melting of the alloy iron, in addition to the dense blowing of the oxygen-containing gas, steam and / or an inert gas such as nitrogen, and / or a rare gas is blown into the partially or completely molten feed material. As a result, the CO partial pressure And iron slag, and alloy element slag, especially chromium slag, are significantly reduced. According to the embodiment of the method of the present invention, carbon blowing is used to produce iron melt or steel melt with a low carbon # content. In step, the carbonaceous material is blown into the slag on the melt at a low speed. Additional refining of the melt is thus avoided. The carbonaceous material is subsequently formed by the slag from the main supplier. $ As a further embodiment of the method of the invention As a result, the liquid blowing steps (', G) performed during ~ or multi-method steps A, B, C, and E are difficult (please read the precautions on the back before filling this page) ------- Order ---------- 丨. -Nn I nnnl 1 Wood paper size is applicable to China A standard (CNS) A4 specification (210 X 297 mm) 530090 A7 '_____B7______ V. Description of the invention (r 丨) Combustible and / or non-flammable, potentially toxic liquids such as halogenated Carbon or oil is blown in by multifunctional nozzles, which decomposes with heat and is thus processed in a manner beneficial to the environment. In this way, a liquid means a solution of a solid that can be treated in a relatively solvent. Preferably, the liquid The blow-in step occurs at the hottest point of the metallurgical vessel and, as a result, the liquid-blowing step is performed during the refining step or the liquid jet is directed to the point of impact of the arc on the melt. Related to proper post-treatment of exhaust gas from the metallurgical vessel For example, quenching of activated carbon, etc., it is possible to handle difficult liquids in an environmentally acceptable and advantageous manner. According to a further embodiment of the method of the present invention, during the refining step (c), the blowing jet of the oxygen-containing gas is influenced in a controlled manner by the blowing of the further gas jet, which occurs by a multifunctional nozzle. The object of the present invention is the use of a multifunctional nozzle in the method of the present invention, which has a number of tubes that surround each other and a common end of the head that is concentric with the central longitudinal axis and forms a multifunctional nozzle. The object of the present invention is achieved by the following combination of features: • the first tube is used to form a supply conduit, especially for liquid or oxygen-containing gas, • the second tube surrounding the first tube to form a first annular crack, especially In order to supplement the oxygen-containing gas, the nozzle part of the second tube is designed as a Laval nozzle, • The third tube surrounding the second tube is to form a second annular crack, especially (please read the note on the back first) Please fill in this page again for matters) ------- Order · -------- * ^ 1. The paper size is applicable to China's 0 standard (CNS) A4 specification (21〇x 297 public love) 530090 A7 ___ — —_ B7 __ 5. Description of the Invention ($) is used for the supplement of gaseous and / or liquid fuel, • the fourth pipe surrounding the third pipe so as to form a third annular crack, especially for the supplement of oxygen-containing gas, • The fifth pipe surrounding the fourth pipe is used to form a fourth annular crack, which is especially used to supplement the cooling water. The fourth annular crack is designed to be closed on the side of the nozzle. Five annular cracks, especially for supplementing oxygen-containing gas, the fifth annular crack ends at Nozzle sides' so as to form several outward flow ducts, and the direction of flow is directed through each outward flow duct offset from the central longitudinal axis, • the seventh tube surrounding the sixth tube to form a sixth annular crack, Especially for the extraction of cooling water, the sixth annular crack is designed to be closed on the side of the nozzle, and the fourth annular crack is connected to the first nozzle in the multifunctional nozzle area by not intersecting the diameter of the outward flow duct. Six annular cracks. • Abrasion-resistant nozzle tubes 1 to 9, especially for the supplementation of solid, delicate grains to dust-like substances, the nozzle tube system is placed in the fifth annular crack and the central axis of each nozzle tube is The arrangement is parallel to the longitudinal axis, and the nozzle tube pierces the head of the multifunctional nozzle without a cross-caliber or outflow conduit. Preferably, fine grains and / or ash-like solids passing through the nozzle tube are blown into the melt or slag. According to this method step, in the carbon blowing step, the supplementation of the carbonaceous material, in particular coal and coke and / or debris, is carried out, and in the solid blowing step, the briquette and / or alloying agent is carried out, Agglomerates and alloys means conventional slag forming agents, slag foaming additives

__1Q Applicable paper size for Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling out this page) -I · ϋ βϋ 1 nnnn-OJI nn ϋ ii flu ϋ I tm — _ 530090 A7 ____B7_____ 5. Description of the invention (J) Additives, reagents for unexpected oxidation of subsidiary elements, reagents for setting the expected composition of the molten metal, etc., which are normally used in the manufacture of molten metal, Special steel and pig iron melts. This nozzle tube makes it possible for the multifunctional nozzle of the present invention to perform carbon and solid blowing functions. The multifunctional nozzle system combining the above features is significantly suitable for blowing up to 200kg / min of very large solids. This is a special advantage when a relatively large portion of the electrical energy system is replaced by petrochemical energy, which requires the production of the melt to further produce the production volume or when a relatively large number of the above-mentioned solid systems are pneumatically blown into the melt. Slags and / or melts are used in a wide range of applications. Because the nozzle portion of the second tube is designed as a Raphael nozzle, the allowable pressure of the oxygen-containing gas during the cutting and melting steps and the refining can be converted into a pulse, that is, the speed. The first annular crack formed by the first and second pipes makes it possible to implement the cutting, melting and refining functions of the multifunctional nozzle of the present invention. Obtained by an oxygen-containing system preferably means industrial oxygen, such as obtained from a gas separation plant or gas or a gas filled with oxygen. The first tube acts as a reproducible control pulse to the Rafar jet that leaves the first annular crack, where the jet advances and the refining effect of the Rafar jet is controlled by the first pipe. This is also used so that the refractory bottom of the metallurgical vessel is not subject to additional wear, if the groove height is low or so controlled that the FeO content in the steel melt is higher than the slag in order to thereby significantly improve the metal melting Desulfurization of substances, even when the carbon content of the melt is relatively high. The multifunctional nozzle of the present invention has _____11 ___ for controlling the slag. 10. The paper size is applicable to China Standard S (CNS) A4 (210 X 297 public love) (Please read the precautions on the back before filling this page)- «-------- Order --------! Line 丨 _----.—— rl · 530090 A7 Γ -------- Β7 ____ V. Description of the Invention (丨 σ ) The ability of the stomach 1_ content and the result is the desulfurization and vanadium removal of the iron melt. The liquid processed by M can also be injected through the first tube to enter the concentrated location in front of the Rafael spray nozzle. The first tube makes it possible for the multifunctional nozzle of the present invention to perform this liquid blowing function. Normally, the first piping is loaded with oxygen or an oxygen-containing gas. During the refining of the alloy melt, the first tube may be loaded with gas or inert gas or vapor to reduce the partial pressure of CO in the concentrated location of the multifunctional nozzle and consequently reduce chromium slagging. In the combustion step, the second and third loop steps serve as supplements for gaseous and liquid fuels, such as natural gas and / or fuel oil, or for oxygen-containing gas supplementation ', especially industrial oxygen is burned by the fuel. The second and third annular cracks make it possible for the multifunctional nozzle of the present invention to perform a burner function for a combustion step. In the post-combustion step, the fifth annular crack formed by the fifth pipe and the sixth pipe is used to supplement the oxygen-containing gas and makes it possible for the multifunctional nozzle of the present invention to perform the function for the post-combustion. The life of the multifunctional nozzle is extended by the cooling shell, which is formed by the fourth and sixth annular cracks and by the diameter connecting the annular cracks and the crack located at the head of the multifunctional nozzle. I .. According to a preferred embodiment, the fifth annular crack on the nozzle side terminates so as to form 2 to 16, preferably 4 outflow ducts. The outflow conduit is guided away from the middle longitudinal axis preferably so that the normal protrusion of the middle shaft of each outflow conduit is drawn to a plane and drawn through the ____12______ The size of the paper is applicable to China S Standard (CNS) A4 specifications (210 X 297 mm) (Please read the notes on the back before filling this page)

A7 530090 B7 ------ '"' " ---- * --- 5. Description of the invention (\,) between the longitudinal axis and through the nozzle of the outflow conduit to form an angle α from 2.5 ° To 25 °, preferably from 5 ° to 15 °. · According to the design of the outflow duct, the oxygen-containing gas is introduced into the environment of the metallurgical vessel through the outflow duct. The wide range of this environment can be covered and the combustible gas can be post-combusted. According to effective features, the middle axis of the outflow conduit is deviated from the middle longitudinal axis of the multifunctional nozzle, and the normal protrusion of the middle axis of each outflow conductor in this way to a plane is clearly guided vertically to the middle longitudinal axis The plane is drawn through the middle longitudinal axis and through the nozzle of the outflow conduit and the longitudinal axis forms an angle of 2.5 ° to 60 ° / 3, preferably 5. To 20%. Angle of / 5. The design of the outflow conduit allows more in-depth post-combustion of the exhaust gas from the metallurgical vessel because the result is that the oxygen-containing gas blown by the outflow conduit and the exhaust gas from the metallurgical vessel are set in a spiral rotation, which is sucked into the oxygen Spray beam. These help to mix the oxygen-containing gas and exhaust with post-combustion. The individual angles α and yS can also be selected differently for individual outflow conduits in each case, so that special boundary conditions are considered when the multifunctional nozzle is used. The nozzle in the form of a Rafael nozzle of the second tube is conveniently designed so that the opening angle of the conical portion of the second tube nozzle is 7 "to 5". , Preferably 0.5 to 3. . The choice of the opening angle T is also based on the conditions in the melt container. Therefore, if the melt container is under overpressure, some lower numbers are selected for r, but in the case of a melt container under low pressure or vacuum conditions (please read the precautions on the back before filling this page). --------- Line — · This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) 530090 A7 ___ —_ B7___ __ V. Description of the invention (〆) The next 'higher' Numbers are beneficial. According to further advantageous features, the nozzle portions of the third and second pipes have grooves on the outside, and these grooves are preferably arranged parallel to the middle longitudinal axis. These grooves serve as an improved cooling for the individual nozzle sections. According to the superior design change, the nozzle portions of the second and third tubes terminate at the first nozzle plane perpendicular to the middle longitudinal axis, and the nozzle portions of the fourth, fifth, sixth and seventh tubes terminate at perpendicular to the middle longitudinal axis The second nozzle plane is set behind the second plane. The piping system installed in the multifunctional nozzle is therefore better resistant to mechanical stress at the nozzle. As a result of a further effective embodiment, the first tube can be moved along the middle longitudinal axis within the second tube, so that further influence can be applied to the Rafael jet from the first annular crack. Furthermore, when the first tube is moved after the second tube is contracted, an increase in the amount of oxygen to be blown can be achieved, given the known allowable pressure. Maintenance can be performed quickly and simply. The nozzle end of the second tube is formed by a releasable connection to the nozzle portion of the second tube, in particular by a sliding connection that can be screwed or sealed by an O-ring seal. Therefore further, maintenance can be carried out particularly quickly and simply, effectively the third and / or fourth and / or fifth and / or sixth and / or seventh pipes are separated at least once in their length, and individually The piping is secured to each other by a releasable connecting part, in particular a screw connection and / or a sliding connection sealed by an o-ring. According to a further effective embodiment, in addition to the nozzle of the second tube, the third and / _______________14_______ This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling in this Page) # --Order · -------- * 5 ^ 丨. 530090 A7 _ B7___ V. Description of the invention (M) or the nozzle of the fourth and / or outflow conduit and / or the nozzle of the nozzle tube are also designed The nozzle diameter for the Rafael nozzle and / or the first tube is widened. The Raphael nozzle form is convenient, in addition to the refining and cutting functions', in particular in order to obtain a high speed and pulse and range or depth for one or more individual gas and / or gas / solid jets, in other words Burner, carbon and solid blowing and post-combustion. Particularly in the case of melt containers under low pressure or vacuum conditions, the widening of the diameter of the first tube nozzle is beneficial. According to an effective embodiment, the nozzle tube system is designed to be resistant to wear. The wear resistance design of the nozzle tube is preferably that the individual tube is made of alloy steel with chromium carbide, or hard chrome plated steel or hard chrome plated copper or copper or steel, which has ceramic inserts or is covered inside and Outside. These wear-resistant designs make it possible to blow in the honing medium, such as fine-grained coal, metal oxides, slag forming agents, and the like, by carrying a gas through the nozzle to the melt or slag without Significantly shortens the life of the nozzle. In a further effective embodiment of the multifunctional nozzle of the present invention, the solid distribution chamber is designed as a nozzle tube remote from the end of the multifunctional nozzle, and the solid distribution chamber is formed by a ring-shaped, completely covered cylindrical hollow body It has a bottom, a top and a lateral restriction and the nozzle tube pierces the bottom of the solid distribution chamber from below and at least one solid supplementary opening is tangent to the lateral restriction of the solid distribution chamber. In addition to the above embodiments, a further circular essentially cylindrical hollow body is preferably provided. Further, the hollow body is opened at the top and has a bottom (please read the precautions on the back before filling this page) mi I— in flu n I. tf— 1 an n an 1 I ϋ tmmmt I If lx nnn _ This paper size 剌 Zhongguanjia standard (CNS) A4 specifications (£ 〇x 29 ^ public) ~ 530090 A7 __B7____ 5. Description of the invention ('U pieces) and lateral restrictions, and further the hollow body is installed inside the solid distribution chamber so that a crack is still between the lid of the solid distribution chamber and the lateral restriction of the further hollow body, and the nozzle tube opens to the further hollow body. bottom. A solid system is blown tangentially into the solid distribution chamber and flows through the crack into a space through an intermediate wall formed by further lateral restraint of the hollow body, the nozzle tube being guided away (that is, into the Further subject). The nozzle into the nozzle is conical and similar to the nozzle tube itself is designed to be resistant to wear. After the connection has been released, the solid distribution chamber can be extracted from the nozzle body by a fast-acting connection or flange. The abrasion-resistant nozzle tube is coupled to the bottom of the solid distribution chamber in a ring shape and can be easily replaced. The multifunctional nozzle system of the present invention is conveniently connected to a carrier gas supplement, particularly an inert gas supplement, and to one or more solid supplements. On the other hand, when no solids distribution chamber is provided, the nozzle tube itself is connected to a carrier gas supplement, particularly an inert gas supplement, and to one or more solid supplements. For further supplementation of multifunctional nozzles with a carrier gas, the first pipe and the first, second, third and fifth annular cracks are connected in each case to a carrier gas supplement, in particular an inert gas supplement. According to the method steps currently implemented, the carrier gas or inert gas may act as an ejector gas for carbon or solid injection or for setting a specific oxygen content of the oxygen-containing gas replenished during the cutting and melting, refining or combustion steps. Furthermore, 'before used in the method of the present invention or the blowing section is not used at that specific time', the multi-functional nozzle can be used by a small jet of inert gas or gas-T, the paper size applies Chinese national standards ( CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) · nmnnnnn One, 0 ¥ anai · mm ** mm ι > μ · a ··· mm ·· i _ 530090 A7 _____B7___ V. Description of the invention (, 〇 淸 is removed and kept free of metal splashing. In order to supplement the multi-function nozzle, all other gases required for this method step, the first tube and the first, third and fifth rings The fissures are connected in each case to oxygen, gas, and, if necessary, steam replenishment, and the second annular fracture is connected to fuel for liquid and / or organic fuel. Additional oxygen and / or gas replenishment The first and / or fifth annular cracks may be provided by hot air supplementation. In this case, hot air means an oxygen-containing gas such as a gas filled with oxygen at a temperature of about 200 to 1000 ° C. Additionally, the gas is at most Functional nozzle gas The replenishment can be adjusted by setting the allowable pressure of the individual gas. In addition, the replenishment of the gas to the multifunctional nozzle can be set by a simple hard diaphragm and / or a fast-acting stop valve, which is installed in each case in an individual Gas pipeline. According to the multifunctional embodiment of the present invention, electromagnetic waves in the visible and near-infrared range can be detected by the optical system and fed to the detection for determining the temperature and / or the chemical composition of the metal melt. Measuring device which is emitted by the molten metal through the first tube and / or the first annular crack. During the measurement, preferably an inert gas is blown through the first tube and / or the first annular crack and at the same time The burner function of the multifunctional nozzle can be kept on. In this case, the electromagnetic wave estimation used to determine the temperature and chemical composition of the melt can be implemented by thermometry and / or optometry. Similar methods have been implemented It was proposed in W097 / 22859 that the difference is that the measurement under the tank is not implemented, such as W097 / 228589. The multifunctional nozzle system of the present invention is effectively installed so that the nozzle system can be _____ji__ _____ This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) m Order --------- line! 530090 A7 _______B7______ V. Description of the invention (^) Replaced and / or rotatable along the longitudinal axis. As a result, on the other hand, the penetration depth of individual gas jets entering the melt can be controlled and the height of the groove surface can be varied Next, the running distance of the gas jet can be set and, on the other hand, a larger area of the tank surface can be reached or washed. It is useful to install a multi-function nozzle below the copper flat plate that protrudes from the metallurgical container. In its internal direction, the multifunctional nozzle remains replaceable and / or rotatable because the nozzle is therefore particularly well protected. The number of multifunctional nozzles used in the metallurgical vessel of the method of the present invention varies with the form of metallurgical vessel and its size. 1 to 10 multifunctional nozzles are available. The investment cost is higher than most. The investment is more than the energy, carbon, and solids introduction and post-combustion that occur in substantially the same way on the entire blast furnace space or on the entire melt surface and the production of individual metallurgical vessels is increased. In the case of most multi-function nozzles, for example, five, it is effective for the multi-function nozzle to be designed with a smaller size, so that the sum of the cross-sectional area of the blow-in is approximately equal to a smaller number of multi-function nozzles, for example Only two multifunctional nozzles were used. Electric furnace and converter washing are typical, but are not a limiting case for the present invention. In order to simplify the nouns, the first pipe, the first, the second, the third, and the fifth annular cracks and the nozzle pipe are designed as nozzle 1, nozzle 2, nozzle 3, nozzle 4, and nozzle together with individual nozzle parts and outflow ducts. 5 和 Jet nozzle 6. In the case of a larger blast furnace according to the present invention, ~ or several multifunctional nozzles are installed above the surface of the groove, preferably on the side wall and in the curved area with ________18_____ 'paper size applicable to China National Standard (CNtS) a4 specifications (210 X 297 mm) (Please read the precautions on the back before filling out this page), ----------- Order .-------- I-530090 A7 _____B7___ 5. Description of the invention (Clever) As for the blast from the top of the commercial furnace, the surface of the groove is measured before the melt is discharged. If the nozzle is installed in the side wall or curved area, the longitudinal axis of the multifunctional nozzle is inclined more than 35 relative to it. Slot surface. The multifunctional nozzle is installed in a stationary manner. In the case of installations with long bricks in the slag area of the electric furnace or sometimes in the curved area of the electric furnace, whether or not there is a possibility of rotation, linearity can replace the nozzle assembly tied to the side wall and / or curved area or the top of the blast furnace Turn. According to the electric furnace, the burner and / or the post-combustion nozzle of the relatively conventional technology are provided. The multifunctional nozzle is preferably used in a cooler blast furnace area (cooled area) or a curved area. In principle, the multifunctional nozzle can be used at all points around the furnace or run down from the top of the furnace. In the case of an electric furnace that has been charged, a device having a large amount of sponge iron passing through the fifth top hole and having a jet beam from a multifunctional nozzle flushing near the sponge iron impact point of the melt is effective because the energy is As required, CO generation and post-combustion and FeO formation are reduced by blowing coal. Regarding the height of the nozzle position of the side wall, if the clear refining of the melt and the penetration of the oxygen jet into the melt are important, the travel distance of the jet from nozzle 2 must be less than 2 meters. of. In the curved part of the electric furnace, the travel distance of the spray beam is mostly less than 1.2 meters. In converters or similar reactors, the travel distance of the jet can even be substantially longer than 2 meters. To optimize the electrode consumption, when the nozzle is installed on the side wall, the nozzle is preferably installed tangentially on an imaginary cylinder. The diameter of the cylinder is between the reference circle of the electrode and the wall of the electric furnace. ____19__ ί, paper size is applicable to China Standard (CNS) A4 size (210 x 7 hair) (Please read the precautions on the back before filling this page)

530090 A7 B7 V. Description of the Invention (θ) The multifunctional nozzle is preferably inserted into a square copper flat plate which is densely cooled and has a side length of about 0.5 meters. The peripheral life of the nozzle is therefore increased. This is particularly important when large pieces of debris are sometimes used and the preheating time exploded by the oxygen from the nozzle 4 and the fuel from the nozzle 3 is kept short. In particular, the oxygen jet from the nozzle 5 or the nozzle 2 can be deviated and a short amount of time can be used to clean the plate, such as can also occur in conventional burners. A multifunctional nozzle installed below a copper flat plate, which protrudes in a wedge-shaped manner in the direction of the interior of the blast furnace, the nozzle has proven to be particularly effective because the nozzle is therefore particularly well protected. The operation system with the multifunctional nozzle of the present invention is described as follows: In the standby position, the nozzle is loaded with the medium, air (nozzle 1), N2 (nozzle 3), air (nozzle 4), and air (nozzle 5) to The minimum quantity, for example, flows at 0.2 bar. During the charging, when the nozzle was exposed to sputtering from the electric furnace during the charging, the pressure at the nozzle increased rapidly to about 1.5 bar. After the iron carrier is charged, such as waste and / or cast iron and large coal, the iron, slag forming agent, etc. are directly reduced. The multifunctional nozzle is actuated in several steps to maintain the clean quantity (ground Starts at 1 bar) and is used for different purposes. However, the time flow of the method steps also depends on the agglomerates of the feed material, the predetermined range of carbon content of the melt, the metal oxide content in the slag, the desulfurization of the melt, etc. and can be varied. In extreme cases, all functions are switched from the beginning and the nozzle is operated for a period of time. In the case of average feed material-conventional waste, the typical operation is as follows: 20_____ This paper size applies to China's 0 standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling (This page) -n an m til vn ffn II-I n tMme nn fn In · ϋ I ΛΜΙ 530090 A7 ____B7___ V. Description of the invention (RP description · First, after the arc of the exhaust gas corner and the flame ignited 'through the nozzle 4 The oxygen is switched and immediately, fuel such as natural gas (0.6 / 7Nm3 / min) from the nozzle 3 is connected. The waste is preheated by the upward steam of the nozzle (combustion gas function). After a short time, follow the use For example, after two minutes, the average oxygen flow rate for cutting and oxidizing melting of scrap iron from nozzle 2 is switched. According to a pre-calculated amount of 02 for refining, the metal has a depth of 20 cm. After the groove has been formed, the melt is decarbonized with a large amount of oxygen by an oxygen jet pulse controlled by the first tube. In this case, the combustion function is still turned on in many use cases, so that the melt is optimized The effectiveness and decarburization and partial oxidation of the melt. After the oxygen from the nozzle 5 has been connected, the combustible blast furnace gas is sucked into the individual oxygen jets and partially burned. At the same time, the released energy is transmitted to the scrap iron with high efficiency. , Slag and melt without loss to the exhaust system. The exhaust system even reduces the heat load. The oxygen jets from nozzle 5, that is, 2 to 16 nozzles of each multifunctional nozzle are blown into the longitudinal direction away from the nozzle Enter the scrap iron running gear downwards. The amount of oxygen passing through nozzle 2 is 4,000 to 3,000 Nm3 per hour, according to the size of the blast furnace and the number of multifunctional nozzles. Coal quilts that reach 0.3 kg / min Agitate via the nozzle 6 per mm2 of the agitating section. According to the operating mode, the melt can be quickly refined or even carbonized. Via the nozzle 6 with a nominal width of 12mm, when a low 0 2 quantity is blown into the via nozzle 2, blow It is possible to feed coal up to 34kg / miri. By blowing coal, the slag is fast (please read the precautions on the back before filling this page). Luline i-line 丨 ·· Chinese national standard --- 530090 A7 B7 five 、 Explanation of the invention (rapid and dense foaming, FeO content in the slag is stabilized at a low level to less than 20% and even in the case of 0.04% carbon content in the melt, the oxygen content in steel is changed from 1000 ppm Reduced to 600ppm. This also results in low consumption of alloying agents and leads to cleaner steel. These factors can precisely control the cleaning nozzle, which is loaded with nitrogen and / or argon plus CH4. When the melt has a low carbon content of 0.03% It must be set and the slag must also be foamed. During the preheating of the melt, the coal is blown into the slag through the nozzle 6 at a very low pressure and a small amount per minute and is therefore refined again. When a considerable amount of carbon is quickly replenished to the melt or to the slag, inert gas, gas or small amount of oxygen is blown in through the nozzle 2 and a large amount of coal is passed through the nozzle 6. At the inlet, the pressure of the nozzle 6 rises with the blowing of coal (or solid blowing), according to the following finger rule: V 1.4 where f represents the factor of pressure rise in the case of a fixed amount of carrier gas and B is in kg / Nm3 represents the carrier gas content. Particularly in the case of a chromium alloy melt, the reduction in CO partial pressure and Cr slag due to inert gas or steam or oxygen from the nozzles 1, 2 and 4 is particularly effective. As a result, a carbon content of less than 0.4% can be efficiently manufactured, that is, a slag with a low degree of alloying elements, at a low temperature and a high throughput. The subsequent VOD treatment (vacuum oxygen degassing) was therefore significantly shortened, and the overall production of EAF with multi-functional nozzles and VOD method paths was increased. The combination of the bottom propelled by oxygen and inert gas or steam with multifunctional nozzles is particularly suitable for the combination of alloy steel, such as stainless steel.

EAF of the inventive method. In extreme cases, stainless steel is used in this type of EAF 22 {Please read the notes on the back before filling this page}

I ------- Ίding --------- I-M scale is applicable to China® Home Standard (CNS) A4 specification (2.1〇χ 297mm) 530090 A7 __B7___ 5. Description of the invention In (), there is not even VOD processing. The multifunctional nozzle and use of the present invention are explained in detail in FIGS. 1 to 6 of the drawings. Figure 1 shows a reduced longitudinal section 'it is drawn through the middle longitudinal axis of the multifunctional nozzle, Figure 2 shows the head of the multifunctional nozzle' Figure 3 is a diagram of the head shown in Figure 2 In the direction of arrow I in Fig. 2, Fig. 4 shows a multifunctional nozzle with a gas replenishing line, and Figs. 5 and 6 show the multifunctional nozzle of the present invention set to a metallurgical vessel. The multifunctional nozzle shown in Fig. 1 has a first to first pipe 1 which is particularly used for supplementation of an oxygen-containing gas. The first pipe 1 extends in the direction of the middle longitudinal axis 2 of the multifunctional nozzle and is surrounded by the second pipe 3 and is supplemented by a first annular crack 4 passing by an oxygen-containing gas, the crack being interposed between the first And formed between the second tube. When the supplemental oxygen-containing gas passes through the first tube 1, the first tube is mainly used to control the pulse of the gas jet from the first annular crack 4 or to control the Fe0 content of the slag. For this purpose, the first tube 1 is moved along the middle longitudinal axis 2 as indicated by arrow Π, for example by a pneumatic disk. The first tube 1 can be used to perform a liquid blowing step. 1 The inside of the second tube 3 is designed in the form of a Rafael nozzle in the nozzle section 5 so that the oxygen-containing gas or oxygen emitted from the nozzle section 5 operates at a supersonic speed. ___23_____ Applicable to China National Standard (CNS) A4 size (210 X 297 mm). (Please read the precautions on the back before filling this page)% Order --------- line! 530090 A7 __B7_ V. Description of the invention (The second tube 3 is surrounded by the third tube 6 so that a second annular crack 7 is formed between the second tube and the third tube. Gaseous and / or liquid fuel passes through the crack The fourth tube 8 surrounds the third tube 6 so that a third annular crack 9 is formed between the third tube and the fourth tube, and the oxygen-containing gas is replenished through the crack. Furthermore, the fourth tube 8 is borrowed. It is surrounded by the fifth pipe 10 so that a fourth annular crack 11 is formed between the fourth pipe and the fifth pipe, and the cooling water is supplemented by the crack. The fifth pipe 10 is also surrounded by the sixth pipe 12 In order to form a fifth annular crack 13 between the fifth pipe and the sixth pipe, the oxygen-containing gas is supplemented by the crack. The fifth annular crack 13 terminates in the several outflow ducts 14 on the side of the nozzle. Outflow duct 14 The middle axis 15 is offset from the longitudinal axis 2 of the multifunctional nozzle. The middle axis of each outflow duct 14 normally projects to a plane passing through the middle longitudinal axis 2 and the nozzle portion of the outflow duct 14 (the plane is equivalent to FIG. 2 Drawing plane) and the intermediate shaft 2 to form an angle α of 2.5 to 25 °. The vertical projection of the middle shaft 15 of each outflow conduit 14 is directed to a plane vertically guided to the middle longitudinal axis 2 (this plane is equivalent to the drawing plane of FIG. 3 and is consistent with the middle axis of the selected view of FIG. 3 Vertical protrusion) forms an angle Θ of 2.5 to 60 ° with the plane surrounded by the longitudinal axis 2 and the nozzle portion of the outflow conduit. As a result, the oxygen-containing gas agitated by the outflow conduit 14 and the exhaust gas from the metallurgical vessel are spirally mixed and moved. It is set and the exhaust gas is sucked into the oxygen jet, and these gases are sucked into the oxygen jet. This results in oxygen-containing gas ____24___ ΐ, the paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (please Read the precautions on the back before filling this page) --------- I ---- · ---- 530090 A / ___ B7 ______ V. Description of the invention (> Λ) and effective mixing of exhaust gas Furthermore, these gases are caused to burn afterwards. The sixth pipe 12 is surrounded by the seventh pipe 17 on the outside, so a sixth annular crack 18 is formed, and the cooling water is extracted through the crack. The fourth annular crack 11 and the sixth The annular crack 18 is designed in the nozzle The sides are closed and connected by the diameter 22 of the head 19 of the multifunctional nozzle. The fourth annular crack 11 and the sixth annular crack 18 and the diameter 20 form a water-cooled double shell, which is about 60m3 / hr water flow ° Several nozzle tubes 21 for replenishing similar dust to refined solids run in the fifth annular crack 13, only one of the nozzle tubes 21 is shown in the cross-sectional area of Figure 1 and Figure 2 of the selected drawing. The 21 series is designed to be wear-resistant internally, for which purpose the nozzle tube is fitted with a ceramic insert. The nozzle tube 21 opens on the head 19 of the multifunctional nozzle or pierces the head. The nozzle of the nozzle tube 21 is cylindrical, but may be slightly conical widened or designed in the form of a Rafael nozzle. In special cases, when the outflow conduit 14 for post-combustion is allocated for use, the complete annular crack 13 may be additionally loaded with a gas and a solid. The solid system is then blown into 'via the outflow conduit 14 which in this case is designed to be resistant to wear. The nozzle sections 5, 22 of the second pipe 3 and the third pipe 6 are provided with several grooves 23 on the sides, due to the dense cooling effect of the gas replenishment passing through the second annular crack 7 and the third annular crack 9 achieve. The fourth tube 8, the fifth tube 10, the sixth tube 12 and the seventh tube 17 terminate at the first nozzle plane 24. The second tube 3 and the third tube 6 terminate in a second nozzle plane 25, and the second nozzle plane is set behind the first plane. ____ 25_ This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling out this page) n ϋ ni flu n-, fnnn I— n Bn · • Line 丨丨 530090 A / _____B7__ 5. Description of the invention (A) The length of both the fourth tube 8 and the fifth tube 10 is divided, the fourth tube 8 is twice and the fifth tube 10-times, and the individual tube elements 8a, 8b , 8c or 10a, 10b are fixed to each other by screw connectors 26. As a result, individual pipe elements can be quickly exchanged in the event of a repair. Sealing occurs by the o-ring. The cooling element of the head 19 of the multifunctional nozzle, that is, the nozzle element of the seventh pipe 8, 10, 12, 17 is preferably made of copper, which is explicitly either welded or forged, but it is preferably Casting. After only one weld seam has been cut in each case, these components can be easily withdrawn and replaced. The nozzle tube 21 is designed approximately in the middle of the multifunctional nozzle with a solid chamber 27 which is designed as a ring-shaped hollow body and surrounds the multiple tubes. Placed inside the solid distribution chamber 27 is a further annular hollow body 28, the main body of which is designed to open at the top end, and a crack is maintained between the top 29 of the solid distribution chamber 27 and the lateral restriction of the further annular hollow body 28. The nozzle tube 21 pierces the bottom 32 of the solid distribution chamber 27 and opens into the bottom 32 of the further hollow body 28. The solid supplement 33 begins to enter the solid distribution chamber 27 tangentially to the distribution chamber. The blown solids are distributed in the solids distribution chamber 27 and flow through the lateral restriction 30 of the other hollow body 28, which forms an outflow that first enters the other hollow body 28 and then enters the nozzle tube 21. t Figure 4 shows a gas and solids replenishment system for a multifunctional nozzle. Fuel system 34, carrier gas system 35, oxygen replenishment 36, gas replenishment 37, one or more solid replenishment 38, and, in special cases, ________26 _ — the size of the clothing paper is applicable to Chinese national standards (210 X 297 mm) ' -(Please read the notes on the back before filling this page)

------- Order · -------- I 530090 A7 _ 一 —_B7 ____ 5. Description of the Invention (/ $) Vapor supplement 39 is to provide gas and solid supplements for all the use cases. Hydrocarbons, such as methane, ethane, propane or butane, CO, or mixtures of these gases are mostly used as fuels, but depending on how they are obtained, the use of liquid fuels is appropriate, such as fuel oils, which are particularly highly viscous In the case of oil, if individual fuels are preheated before use. An inert gas such as nitrogen, argon, or a mixture of these gases is typically used as the carrier gas. Depending on the conditions of use, however, other gases such as gas or natural gas are also considered as carrier gases. The first pipe 1 and the first annular crack 4, the second annular crack 7, the third annular crack 9, and the fifth annular crack 13 are provided in the gas feed lines 40, 41, 42, 43, 44, 44 The two annular cracks 7 are connected to the fuel supplement 34 and the carrier gas 35, and the remaining annular gas 4, 9, 13 and the first pipe 1 are connected to the carrier gas 35, oxygen 36 and gas supplement 37 in each case. For special use purposes to steam supplement 39 ° For coal and solids of the multifunctional nozzle of the present invention, the 'bearing gas feed pipe 45 to the solid distribution chamber 27 and for special cases' the gas feed pipe 41, 43, 44 The first, third, and fifth annular cracks are provided in each case with a solid supplement 38, which in each case is' connectable and separated to the effect of detailed functional diversity. The main amount of solids is mainly coal blown in through the nozzle tube 21. However, in additional cases, another quantity of solids can also be blown in at any time via the-or multi-ring cracks 4, 9, and 13, where the individual carrier gas used for the solids blowing may be oxygen, air, steam or these Mixing of gases _________27__________ The size of wood and paper is applicable to China National Standard (CNS) A4 (210 X 297 mm) (please read the precautions on the back before filling this page) Φ Order ------- line 丨 530090 A7 -------- B7___ V. Invention Description (). In addition, the multifunctional nozzle or the fourth annular crack and the sixth annular crack 18 series device cooling water inflow 46 and cooling water outflow 47. Cooling water can be dispersed in many use cases. So in certain situations, if it is not necessary to maintain the significant durability of the nozzle head, it may also be in an electric furnace. Fig. 5 shows a vertical section through the electric furnace 48, in which the multifunctional nozzles 49, 50 of the present invention are installed. Further, the penetration of the jet 51 to the melt 52 or the slag 53 and the oxygen jet (short arrow 54) used for the post-combustion of the blast furnace exhaust gas are shown. However, a conventional burner / post-combustion nozzle 55, a door burner 56, and a bottom scavenging nozzle 57 are installed in the electric furnace 48, and a tapping point 58 is provided. The multifunctional nozzle 50 is protected by a flat plate 59 bent toward the inside of the blast furnace. Fig. 5a shows a horizontal section through the electric furnace 48 of Fig. 5. The multifunctional nozzle 50 is installed approximately tangent to the circle 圏, which is concentric with the electrode reference circle. This prevents excessive electrode wear or premature wear. Another multifunctional nozzle 49 is installed in the curved area 61 of the electric furnace 48. Figures 6 and 6a show multifunctional nozzles 49, 50 in an electric furnace 62 with an eccentric shaft, a burner / post-combustion 55 and a bottom nozzle 57. The other multifunctional nozzle 65 is guided by a lifting gear (not shown in the figure) and is placed in the electric furnace 62. The outside enters one or more positions through the pores at the top to enter the inside of the blast furnace for combustion purposes. In this type of electric furnace, it is particularly important for the preheating and partially viscous scrap iron 63 to move in the direction of the electrode 64 without forming a framework. This is achieved in a particularly good manner by means of a nozzle device. Reduce the baking time is less than 40 minutes and the current consumption is less than 290kWh / t series of liquid steel _ ___28 ____ This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) f Please read the precautions on the back first (Fill in this page) »丨 丨 丨 I 丨 丨 —Order. 530090 A7 _—_______ B7___ 5. Description of the invention (1) Possible. The multifunctional nozzle is introduced through the top of the electric furnace. Practical Cases Nozzle 1, Nozzle 2, Nozzle 3, Nozzle 4, Nozzle 5, and Nozzle 6 are designed for the first to second, third, fifth, and fifth pipe annular cracks and the nozzle tube or individual nozzle elements are used again In the following case. Case 1 In a 115-ton electric furnace with a transformer power of 80MVA, three multi-function nozzles (49 and 50) are set, as shown in Figures 5 and 5a. The electric furnace is also equipped with two bottom-erasing nozzles and four post-burner / burner nozzles 55 and door burners 57. When the first scrap iron frame with 49 tons of waste iron, 19 tons of solid pig iron, and 1,000 kg of coal is put into a metal tank of about 20 tons, nozzle 1, nozzle 2, nozzle 4, and nozzle 5 are passed through air. During the introduction period, the nozzles 3 and 4 are loaded with 6Nm3 (nozzle 4) per minute of 02 and 3Nm3 (nozzle 3) per minute of CH4. After 2 minutes, nozzle 2 and nozzle 5 were changed from air to oxygen and loaded with 6 (nozzle 2) and 4.5 Nm3 / min respectively. In the case of fine grain coal of 5 kg / min, air was blown through nozzle 6 In order to accelerate the melting of the scrap iron and control the oxidation of the scrap iron. Five minutes after turning on the power, that is, after the amount of molten metal increased, the amount of oxygen in nozzle 2 was increased to 16 Nm3 / min and the coal transported through the nozzle was doubled to 12 kg / rmn. Toward the end of the melting operation of the first frame, the amount of oxygen passing through the nozzle 5 is reduced again. 57 tons of scrap iron is introduced into the second frame, and it is the same as preheating, cutting, accelerated melting and post-combustion of electric furnace exhaust gas. With multi-function nozzle and post-combustion ) A4 specification (210 X 297 mm.) (Please read the precautions on the back before filling out this page) ϋ n an nn It n First line 丨 Qin 530090 A7 __—_ B7 _______ 5. Description of the invention (Nozzle is implemented, and Intensive refining is performed by an oxygen jet from three multifunctional nozzles. The two bottom nozzles 57 are 0.4Nm3 per minute and 0.2Nm3 per minute of CH4, which are premixed in a gas adjustment station. Although only half the rate during the two flat tanks. Oxygen passing through all post-combustion nozzles 55 was used for this exhaust gas analysis, so that the CO content did not rise more than 10% in the exhaust gas. According to the bubble melting for the melt The composition of the slag and the carbon content are about 1580 ° C and 0.03% respectively. The coal blowing system is set. During 3 minutes, the coal is replaced by granular fine parts. The slag foaming is thereby The method happens to function. During the warm-up period, refining is carried out at 4500Nm3 per hour. At the same time, the multi-function nozzles 49 and 50 burn the nozzle (nozzle 5) and the burner 55 is kept clean by air. Before the furnace and after the slag discharge In 2 minutes, coal was densely fed so that the oxygen content of the melt was reduced to 600 ppm. 0.3% carbon in the melt (melt), FeO content in the slag was 18% and the liquid steel output was 92%. The time and melting capacity are about 52min and 132 tons / hour respectively. Consumption reaches 39kg per ton of lime, 2.1kg per ton of electrode, 9kg per ton of briquette coal, 12kg per ton of blown coal, 55Nm3 per ton of oxygen, Ayuan 4Nm3 per ton and 290kWh per ton of liquid steel. The multifunctional nozzle used in the case has a durability of 800 batches. / Only the nozzle for blowing coal is exchanged as a precaution. Case 2 In a 60-ton electric furnace, The chrome compound melt yield is reduced by 0.8 to 0.3% with the help of 3 smaller multifunctional nozzles. ____30____ The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) ) — »—„ --------- ---- Order · -------- (Please read the notes on the back before filling out this page) 530090 A7 B7-I -------- 5. Description of the invention (> /) in Finally, the third refining process made slag by blowing in 40% 〇2 and 60% N2; ^ CnCh content was maintained below 12%. In these tests, three scavenger nozzles were operated with N2 + CH4, and used in The bottom of the electric stove. With a refining process with multifunctional nozzles, subsequent VOD processing can be shortened by 30mm per batch. The slag foams by blowing into the slag forming agent. For this purpose, however, the amount of blown solids must be increased to 90 kg / min. The final carbon content is 0.03% ° Case 3 In the melting of 80% DRI and 20% scrap iron, a multifunctional nozzle is installed in the furnace area of the bending area of the electric furnace and 2 multifunctional nozzle systems are installed so that It is moved into the interior of the electric furnace through the top of the electric furnace. These two nozzles are continuously blown into the electric furnace at the point of impact of the DRI. This tank area is also more efficiently mixed by two eliminator nozzles, which are installed at the bottom of the electric furnace and blown with N2 + CH4. The main advantage is that it reduces the out-of-bath time in a 150-ton electric furnace from 105 minutes to 83 minutes. Yield increased by 20%. Case 4 At the bottom of a 65-ton converter with oxygen and lime dust blowing, a multi-function nozzle was installed in a stationary manner outside the radius of the converter. 200Nm3 per minute is blown in through the bottom and is blown in by a multifunctional nozzle during the main decarbonization period until 105Nm3 per minute is blown. With 3 minutes of scrap iron preheating, 15kg per ton of coal is blown in and burned after the converter and the part of the converter exhaust gas for heat transfer, it is possible to increase the scrap iron ratio (related to the production of liquid steel) from 22 to 27% . Lower the bottom nozzle, increase the distance between the nozzles and increase the durability of the bottom. It is possible to work in batches from 700 to 820. 31____ The size of the paper is applicable to China's 0 standard (CNS) A4 size (210 x 297 mm) (please Read the notes on the back before filling this page) Order -------- line! # 530090 A7 _____ ^ B7_ 5. Description of the invention (^). It is particularly important that the metal and slag shell of the upper converter cone is reduced to such an extent that it is no longer necessary to remove it by burning or destroying it in a time-consuming manner. Converter efficiency is therefore increased. Due to the characteristics of this multifunctional nozzle, oxygen supplementation will be transferred from the side nozzle of the converter wall to the outside of the converter radius. The running length of the free jet was increased by 2.4m without any adverse effects. Case 5 The use of multifunctional nozzles is particularly superior in the 120-ton DC electric furnace system, where the metal feed block includes 52% liquid pig iron and 48% scrap iron in trace elements. However, pig iron has a sulfur content of 0.15%. In an electric furnace with a converter power of 95 MVA, four multifunctional nozzles are installed on the side wall of the electric furnace. Two of the four nozzles do not perform any coal blowing in because the liquid pig iron contains sufficient carbon. However, the nozzle 6 is periodically loaded with lime dust (100 kg / min in total) in order to facilitate sulfur discharge. This also includes the measurement of the load nozzle 1 of the multifunctional nozzle during some combustion periods by the oxygen pressure (8 bar) and by increasing the FeO content of the slag from 20% to 35%. It is possible to improve the sulfur distribution between slag and molten material from 50 to 90%, that is, the desulfurization system is significantly improved, and the sulfur content of 0.015% is set in the finished sample without wasting time. The amount of slag was 120kg per ton of liquid steel. Two water-cooled oxygen nozzles were removed, which were normally moved into the electric furnace through the slag door for refining and slagging. The electric furnace door was only opened when the discharge was stopped, and the cold nitrogen-containing system was substantially lowered. The following operation mode is adopted: After the first and only scrap iron frame is added, the scrap iron area below the electrode is ______32___ _ ί, the paper size applies the Chinese National Standard (CNS) A4 specification (210 x 297) — — (please (Read the notes on the back before filling out this page)

丁 Ｍ -—ϋ ί I nn ^ VI tti · — MaMi nnn I— I —PJ -nn 530090 A7 ___B7__ 5. Description of the invention (M) (Please read the notes on the back before filling this page) The domain is 5 Within minutes the top of the electric furnace was opened and liquid pig iron was quickly poured into this space by means of a pig iron ladle. Until the current replenishment is interrupted, the multi-function nozzle is operated in the burner mode and, before pig iron is poured in, post-combustion and scrap iron cutting modes. After the pig iron has been poured, the refining system is implemented. In each case, there are 1700 Nm3 per hour. The refining jet of the multifunctional nozzle impacts the molten material at four locations. The nozzle 5 for the post-combustion of electric furnace gas is blown in the longitudinal axis of the multifunctional nozzle which is shorter than the running distance of the electric furnace with 100% scrap iron feed. The heat released during the post-combustion is therefore transferred to the slag and melt with higher efficiency. As a result, the current consumption of liquid steel was reduced from 225 to 190 kWh / t, the follow-up time of the furnace was reduced by 10%, and the nitrogen content in the refined steel was reduced from 58 to 49 ppm. In this application, the durability of the multifunctional nozzle is higher than that of the water-cooled refining nozzle. The present invention is not limited to the exemplary embodiments illustrated in the drawings and cases, and includes all devices known to those skilled in the art, which are used by the present invention. Therefore, it is within the scope of the present invention to combine different possibilities, which allows multi-functional nozzles and operating modes in different embodiments, and changing the operating conditions of these to other reactors for making many kinds of melts, for example with low Carbon content of iron alloys. ___33 Applicable to China's zero standard (CNS) A4 size (210 X 297 mm)

Claims (1)

A8B8C8D8 530090 6. Scope of patent application (please read the precautions on the back before filling this page) F) In the solid blowing step, the necessary substances are replenished to the feed substances, which are made of fine grains and / or similar dust Blow-in of solid pellets and / or alloying agents, and the blow-in takes place in the form of one or more multi-functional nozzles in order to achieve the desired composition of the molten metal, depending on the composition of the feed material and what is desired Metal melt composition, steps A) to F) are selectively implemented in any desired combination, in particular in successive and / or reverse order and / or simultaneously and / or omitting individual steps of steps A) to F) The way. 2. The method according to item 1 of the scope of patent application, wherein the electric furnace or steel converter or melting vaporizer or ladle or the container for slag conversion is regarded as a metallurgical container for metallurgical containers under excessive pressure, atmospheric pressure, low pressure Or vacuum. 3. The method according to item 1 or 2 of the scope of patent application, in which one or more multifunctional nozzles are connected with burners and / or refining nozzles and / or post-combustion nozzles and / or in the case of electric furnaces. The use of slot nozzles and / or hollow electrodes and / or side nozzles in the case of converters is well known in each case. 4. The method according to item 1 or 2 of the scope of patent application, wherein in the solid blowing step, one or more of the following substances are blown into or on the partially or completely molten feed substance: metal ore 'such as chromium Ores, nickel ores, manganese ores, metal oxides such as nickel oxide, vanadium oxide and chromium oxide, iron carbide, carbonized brocade, brocade, FeSi, FeCr, FeMn, oily scale, smelting, smelting forming agents, from dust removal systems Dust, honing dust, metal wafers, oxygen scavengers, chip particles, lime, coal, coke and sponge iron, in each case in the form of fine grains and / or similar dust. ________2__ A paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 188825 ABCD 530090 6. Application for a patent scope 5. If the method of item 1 or 2 of the patent scope is applied, in the post-combustion step The blowing of the oxygen-containing gas occurs in a periodic fluctuation and / or pulsation manner. 6. The method of claim 1 or 2, wherein in the carbon blowing step and / or the solid blowing step in the electric furnace, the spray beam from the multifunctional nozzle is guided near the impact point or into At the point of impact of the arc on the solid material or molten material, the solid material is added to the molten material through a thin tube on the top of the electric furnace. 7. The method according to item 1 or 2 of the patent application scope, wherein in the carbon blowing step and / or the solid blowing step in the converter, the spray beam from the multifunctional nozzle is guided near the impact point or from In the impact point of the oxygen jet of another nozzle or a side nozzle on the melt. 8. The method of claim 1 or 2, wherein one or more steps of method steps A, B, D, E and F are carried out substantially simultaneously with the refining step by a multifunctional nozzle. 9. The method according to item 8 of the patent application, wherein the combustion step is performed substantially simultaneously with the refining step by a multifunctional nozzle. 10. The method of claim 1 or claim 2, wherein during the refining step, during the production of a preferred alloy iron melt having a low carbon content, steam and / or inert gases such as nitrogen, and / or noble gases are blown Into or on a partly or completely molten feed material, in addition to intensified blowing into the oxygen-containing gas. 11. The method according to item i or 2 of the scope of patent application, wherein in the carbon blowing step, 'manufacturing iron molten steel or steel molten material with low carbon content ________ ^ _____ This paper size is applicable to national standards (CNS) ) A4 specification (21〇χ 297 mm) " (Please read the precautions on the back before filling this page), 1T: Line 530090 Λ8 B8 C8 D8 VI. Patent Application Scope (Please read the precautions on the back first (Fill in this page again) The carbonaceous material is blown into the slag located on the melt and into it only at a low speed. 12. The method according to item 1 or 2 of the scope of patent application, wherein, during one or more steps of one or more method steps A, B, C and E, a liquid blowing step (G) is performed, which is difficult to handle Combustible and / or non-combustible, possibly toxic liquids are blown in through multifunctional nozzles and thermally decomposed to dispose of them in an environmentally friendly manner. 13. The method of claim 12 in which the liquid blowing step is performed during the refining step. I4. The method according to item 1 or 2 of the scope of patent application, wherein, during the refining step (C), the blowing jet of an oxygen-containing gas is influenced in a controlled manner by the blowing of another gas jet, and The blow-in takes place in the form of a multifunctional nozzle. 15. A multifunctional nozzle used in the method of any one of claims 1 to 13 of the scope of patent application, which has several tubes surrounding each other and concentric with the middle longitudinal axis (2) and forming the multifunctional The common end of the nozzle head (19) is characterized by a combination of the following features: • the first tube (1) used to form a supply conduit, especially for liquid or oxygen-containing gas 5 • surrounding the first tube ( 1) The second pipe (3), so as to form the first annular crack (4), is especially used to supplement the oxygen-containing gas, and the nozzle part (5) of the second pipe (3) is designed as a Lafar nozzle ( Laval nozzie), • The third tube (6) surrounds the second tube (3) to form a second annular crack (7), especially for the supplementation of gaseous and / or liquid fuels. __________ This paper size applies to China Standard (CNS) A4 specification (210 X 297 mm) " 530090 u Λ8 B8 C8 D8 6. Scope of patent application • The fourth pipe (8) surrounding the third pipe (6) in order to form a third annular crack ( 9), especially for supplementing oxygen-containing gas, (Please read the precautions on the back before writing this page ) • The fifth pipe (10) surrounding the fourth pipe (8), so as to form a fourth annular crack (11), especially for replenishing cooling water, the fourth annular crack (11) is designed on the side of the nozzle For sealing, • The sixth pipe (12) surrounding the fifth pipe (10), so as to form a fifth annular crack (13), especially for supplementing oxygen-containing gas, the fifth annular crack (13) ends at The side of the nozzle so as to form several outward flow ducts (14), and the flow direction is directed through each outward flow duct (14) deviating from the central longitudinal axis (2), surrounding the sixth tube (12) The seventh pipe (17) is used to form a sixth annular crack (18), which is especially used for pumping cooling water. The sixth annular crack (18) is designed to be closed on the side of the nozzle, and the fourth annular crack (11) It is connected to the sixth annular crack (18) in the area of the multifunctional nozzle by the diameter (20) of the outward flow conduit. (14). • The anti-wear design of 1 to 9 nozzle tube (21), especially for the supplement of solid, delicate grains to dust-like substances, the nozzle tube (21) is placed in the fifth annular crack (13) and The central axis (66) of each nozzle tube is aligned parallel to the longitudinal axis, and the nozzle tube (21) is pierced through the head (19) of the multifunctional nozzle without cross-caliber (20) or outflow Catheter (14). 16. The multifunctional nozzle according to item 15 of the patent application, wherein two to sixteen, preferably four outflow conduits (14) are provided. 17. For multifunctional nozzles with the scope of patent application No. 15 or 16, its _________5 ___ This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) A8B8C8D8 530090 6. Scope of patent application (please first Read the notes on the back and rewrite this page) in the middle shaft (15) of each outflow conduit (14). The normal protrusion of the middle shaft (15) to a plane is drawn through the middle longitudinal shaft (2) and through the nozzle of the outflow conduit and The intermediate longitudinal axis forms an angle α of 2.5 ° to 25 °, preferably an angle α of 5 ° to 15 °. 18. If the multifunctional nozzle of the scope of patent application No. 15 or 16, wherein the normal protrusion of the intermediate shaft (15) of each outflow conductor (14) is vertically guided to the intermediate longitudinal axis (2), the plane It is drawn through the intermediate longitudinal axis (2) and through the nozzle of the outflow conduit to form an angle of 2.5 ° to 60 ° with the longitudinal axis, preferably an angle of 5 ° to 35 ° / 3. 19. The multifunctional nozzle according to item 15 or 16 of the patent application scope, wherein the opening angle r of the conical part of the nozzle of the second tube (3) is 0.1 to 5 °, preferably 0.5 to 3 °. 20. If the multifunctional nozzle of the scope of patent application No. 15 or 16, wherein the nozzle part (5, 22) of the second pipe and / or the third pipe (3, 8) has a groove (23) on the outside, these The grooves (23) are preferably arranged parallel to the middle longitudinal axis (2). 21. If the multifunctional nozzle of the scope of patent application No. 15 or 16, the nozzle part of the second (5) and the third pipe (22) terminates in the first nozzle plane (24) perpendicular to the middle longitudinal axis (2) ), And the nozzles of the fourth, fifth, sixth and seventh tubes (8, 10, 12, 17) terminate at the second nozzle plane (25) and the first nozzle plane perpendicular to the middle longitudinal axis (2) (24) is set behind the second plane (25). 22. For multifunctional nozzles with the scope of patent application No. 15 or 16, the first tube (1) can be moved along the middle longitudinal axis (2) in the second tube (3). The paper size applies to Chinese national standards (CNS) A4 specification (210 X 297 mm) 530090 as B8 C8 D8 6. The scope of patent application is subject to change. (Please read the precautions on the back before writing this page) 23. If the multifunctional nozzle of the patent application No. 15 or 16, the nozzle part (5) of the second tube (3) is releasably connected with the first The two tubes (3) are connected, in particular by a sliding connection which can be connected to the latter in a spiral or sealed by an o-ring. 24. If the multifunctional nozzle of the scope of the patent application is No. 15 or 16, the third (6) and / or the fourth (8) and / or the fifth (10) and / or the sixth (12) and / or The seventh tube (17) is separated at least once in its length, and the individual tube parts are fixed to each other by a releasable connection part, in particular the screw connection part (26) and / or sealed by an O-ring Slide connection. 25. If the multifunctional nozzle of the scope of patent application No. 15 or 16, except the nozzle of the second pipe (3), the third (6) and / or the fourth (8) and / or the outflow conduit (14) The nozzle of the nozzle and / or nozzle tube (21) is also designed such that the nozzle diameter of the Rafael nozzle and / or the first tube is widened. 26. The multifunctional nozzle according to the scope of patent application No. 15 or 16, wherein the nozzle pipe (21) is designed to be wear-resistant. 27. The multifunctional nozzle according to claim 26, wherein the nozzle pipe (21) is made of alloy steel with chromium carbide, or hard chromium plated steel or hard chromium plated copper or copper or steel, which has ceramics. Inserts may be covered inside and, if appropriate, outside. 28. For example, the multifunctional nozzle of the scope of the patent application No. 15, wherein the solid distribution chamber (27) is designed to be located at the nozzle pipe (21) and the solid distribution chamber (27) away from the head (19) of the multifunctional nozzle. ) It is formed by ring and basic _ 7_____; _ This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 8888 ABCD 530090 6. The cylindrical hollow body completely covered on the scope of patent application It has a bottom (31), a top cover (30) and a lateral restriction (67). The nozzle tube (21) pierces the bottom (29) of the solid distribution chamber (27) from below, and at least one solid supplement (33) The opening is tangent to the lateral restriction (67) of the solid distribution chamber (27). 29. The multifunctional nozzle of the scope of patent application No. 28, which further provides a ring-shaped and substantially cylindrical hollow body (28), the further hollow body is opened at the top and has a bottom (32) And lateral restriction (30), and the further hollow body (28) is placed in the solid distribution chamber (27) so that the crack (68) maintains the top cover (29) and further between the solid distribution chamber (27) The horizontal restriction (30) of the hollow body (28) and the nozzle tube (21) opens into the bottom (32) of the further hollow body (28). 30. For example, the multifunctional nozzle of the scope of application for patent No. 28, wherein the solid distribution chamber (27) is connected to the carrier gas supplement (35) by a carrier gas supplement line (45), particularly a noble gas supplement, and connected to One or more solid make-up lines (38). 31. The multifunctional nozzle according to the scope of patent application item 15, wherein the inert gas is connected to the carrier gas (35), in particular to the inert gas supplement and to the solid supplement (38). 32. As for the multifunctional nozzle of the scope of application for patent No. 15, wherein the first pipe (1) and the first (4), the second (7), the third (9) and the fifth (10) annular cracks are in In each case it is connected to a carrier gas supplement (35), in particular an inert gas supplement. _ «_ This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before writing this page) .0 Line 530090 A8 Scolded D8 Sixth, the scope of patent application 33. For example, the multifunctional nozzle of the patent application [item 15], in which the first to fourth tubes (1) and the first (4), third (9) and fifth (10) ring cracks are connected to Oxygen supplementation (36), gas supplementation (37), and steam supplementation if required. 34. For example, the multifunctional nozzle of [15], wherein the second annular crack (7) is connected to the fuel replenishment (34) for liquid and / or gaseous fuel. 35. The multifunctional nozzle according to any one of the patent application _ items 30 to 34, wherein the supplementation of gas to the multifunctional nozzle can be adjusted by setting the allowable pressure of the individual gas. 36. If the multi-function nozzle of any of the patent application Fanzhan 30 to 34 'in which the supplement of gas to the multi-function nozzle can be set by a simple hard diaphragm and / or a fast-acting stop valve, In each case, individual gas lines are arranged. 37. If the multifunctional nozzle of the patent application No. μ or 16 is used, the visible light emitted by the molten metal and electromagnetic waves near the infrared range can pass through the first tube (1) and / or the first annular crack (4) Detected by means of an optical system 'and fed to a detector used to determine the temperature and / or the chemical composition of the metal melt. 38. If the multifunctional nozzle of the scope of patent application No. 15 or 16 is used in a metallurgical valley device, where the multifunctional nozzle is installed in a static manner or can be replaced along the longitudinal axis and / or pivotally installation. 39. If the multifunctional nozzle of the scope of application for patent No. 15 or 16 is used for metallurgical Guyi, where the multifunctional nozzle is installed under the copper flat plate, the paper size applies to the Chinese National Standard (CNS) A4 specification ( 210 X 297¾¾ --- C Please read the notes on the back before writing this page} m, IT, line U 530090 Jaw C8 D8 VI. Patent application scope Copper flat plate protrudes from the inner direction of the metallurgical container. 40. If applied The multifunctional nozzles of the patent scope No. 15 or 16 are used for metallurgical containers, of which 1 to 10 multifunctional nozzles are provided. (Please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm)