KR101969110B1 - Method for manufacturing coal briquettes and apparatus for manufacturing the same - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a method and apparatus for producing a molded coal, and more particularly, to a method and apparatus for producing a molded coal for producing molded coal having excellent strength.
A method of manufacturing a briquette according to an embodiment of the present invention includes the steps of: providing coal; Mixing a high-temperature char produced in the carbonization process of the organic material with the coal to produce a raw coal; Preparing a mixture by mixing a curing agent and a binder in the raw coke; And molding the mixture.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method and apparatus for manufacturing molded-

TECHNICAL FIELD The present invention relates to a method and apparatus for producing a molded coal, and more particularly, to a method and apparatus for producing a molded coal for producing molded coal having excellent strength.

The blast furnace process for producing molten iron has been continuously developed as the most competitive steelmaking process in terms of productivity and energy efficiency. However, for the blast furnace operation, sinter ore or pellets or coke that have been pre-agglomerated with ore and coal are needed. At this time, in order to satisfy the quality required in the blast furnace process, there is a restriction to use only raw iron ore and coal having a certain quality.

Technological developments and equipment improvements to overcome these limitations are actively undergoing, but there is some limit. In other words, high grade iron ore and coal are becoming scarce globally, and prices are rising accordingly.

On the other hand, various alternative processes for solving the environmental problems arising in the sintering process and the coke making process have been researched and developed, and some processes are being put to practical use. The first step in commercialization is the COREX process. The FINEX process, which enables the use of low cost fuels and raw materials directly, has also been developed and commercialized, dramatically improving the problems of the COREX process.

The Corlex process is a process in which pellets or ore are charged to a reducing furnace instead of existing sinter ore and coke to partially reduce it and then melted and reduced in a melting furnace to produce molten iron. At this time, charge for the heat source and the reducing agent is charged. However, the effective treatment of large quantities of iron ore and coal, which is generated after using the coal and coal used in the corex process selectively, still remains a big problem. On the other hand, a Finex process, which is characterized in that all types of iron ore and coal can be directly used to overcome the problems of such a facility configuration, has been developed and commercialized.

The FINEX process consists of a process of reducing iron ore, a process of agglomerating reduced iron ore, a reducing process of pre-heating and partial reduction of iron ore and agglomerated iron ore, and a process of forming coal, charging these raw materials and fuel And a melting furnace for producing molten iron through reduction and melting.

In the FINEX melting furnace operation, HCI (Hot Compact Iron) is supplied from the upper part of the melting furnace to the iron source. For the reduction and melting of the HCI, fuel is injected from the upper part of the furnace and oxygen is taken in from the lower part together with the pulverized coal. The briquettes must maintain a certain degree of particle size in the melting furnace to maintain air permeability and liquid permeability.

However, unlike the coke used in the blast furnace, the blast furnace is susceptible to thermal shock and mechanical abrasion. Since the blast furnace is directly charged into the melting furnace in the cold state, there is an increasing demand for the blast furnace with excellent strength.

KR 10-2003-0013056 A

The present invention provides a method and apparatus for producing molded-on-a-bodied carbon which can produce molded bodys with excellent hot strength and mechanical strength.

A method of manufacturing a briquette according to an embodiment of the present invention includes the steps of: providing coal; Mixing a high-temperature char produced in the carbonization process of the organic material with the coal to produce a raw coal; Preparing a mixture by mixing a curing agent and a binder in the raw coke; And molding the mixture.

The pulverized coal may contain at least one powder selected from bituminous coal, bituminous coal, anthracite coal, lignite and coke.

In the process for producing the coke, the coke can be produced by mixing the carbon black at room temperature and char having a temperature of 400 to 1000 ° C.

The char may be mixed in an amount of 1 to 15% by weight based on 100% by weight of the coke.

The pulverized coal may have a particle size of 5 mm or less, and the char may have a particle size of 1 mm or less.

The temperature of the coke may be in the range of 30 to 150 ° C.

The curing agent is mixed with 1 to 5 parts by weight with respect to 100 parts by weight of the coke, and may include at least one material selected from calcium oxide, calcium hydroxide, limestone, calcium carbonate, cement, bentonite and clay.

The binder may be blended in an amount of 3 to 15 parts by weight with respect to 100 parts by weight of the coke oven and may include one or more materials selected from molasses, bithumene, asphalt, coal tar, pitch, starch, water glass, plastic, polymer resin and oil have.

And heating and carbonizing the molded mixture.

The carbonization may be performed by heating the molded mixture to a temperature of 400 to 1000 ° C.

The char can be generated in the course of heating and carbonizing the molded mixture of the previous process.

The char may contain 2 to 15% by weight of volatile matter based on 100% by weight of the char.

In addition, the apparatus for producing molded coal according to an embodiment of the present invention includes: a powder storage unit for storing a powder; A char storage unit for storing a high temperature char generated in the carbonization process of the organic material; A mixer for mixing the coal powder supplied from the powder storage part with char supplied from the char storage part to produce a coke, mixing the coke with a binder to prepare a mixture; And a molding part for molding the mixture provided from the mixing part.

And a carbonized portion which carbonizes by heating the molding provided from the molding portion.

Further comprising a classifier for classifying the carbide provided from the carbonized portion into massive molded bodys and granular chars, and the granular chars classified from the classifying portion are stored in the char storage portion Lt; / RTI >

The massive briquettes may be provided as a melt gasification furnace for melting the reduced iron in a melt reduction facility.

According to the method and apparatus for producing a molded part of the present invention, it is possible to manufacture a molded product having excellent strength by directly using a high-temperature char generated in a carbonization process of an organic material as a raw material. That is, the thermal energy possessed by the high-temperature char can be used as the energy for heating and hot-forming the coking coal, thereby improving the strength development speed, hot strength and mechanical strength at the time of molding.

Further, by using the briquettes having an improved strength as a heat source for melting iron ores in the melting and reducing equipment, it is possible to improve the air permeability of the reducing gas and to maintain the liquid permeability of the melted reduced iron and slag.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart schematically illustrating a method for producing a briquette according to an embodiment of the present invention; FIG.
2 is a graph showing changes in hot strength of the briquette according to the carbonization start temperature.
3 is a graph showing the change in hot strength of the briquette according to the carbonization end temperature.
4 is a view schematically showing an apparatus for producing a molded coal according to an embodiment of the present invention.
5 is a schematic view of a melting and reducing equipment using briquettes produced according to an embodiment of the present invention.

The method and apparatus for producing and molding a molded carbon according to the present invention provide a technical feature that can improve the hot strength and mechanical strength of a briquette using a high temperature char generated in a carbonization process of an organic material as a raw material.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Wherein like reference numerals refer to like elements throughout.

Melting Reduction The melting reduction equipment used in the FINEX process consists of a fluidized-bed reduction furnace that reduces iron ore and a melting gasification furnace that melts it. In the case of melting iron ore in a melting gasification furnace, the molten gasification furnace is charged with the shaped coal as a heat source for melting iron ores. The briquettes charged into the melter-gasifier form a coal-packed bed and react with the oxygen blown through the tuyere installed at the bottom of the melter-gasifier to produce combustion gas after combustion. The combustion gas passes through the upper coal filler layer and is converted into a high-temperature reducing gas and discharged to the outside of the melter-gasifier, and then used as a reducing gas for reducing iron ores in the fluidized bed reduction furnace. Is melted and then converted to molten iron and slag, and then discharged to the outside.

Generally, briquettes for molten steel reduction are produced by mixing pulverized coal and binder and then compressing them. In the case of the briquetting coal to be used in the melting and gasifying furnace, excellent strength is required in order to smoothly maintain the permeability of the reducing gas and the liquid permeability of the melted reduced iron and slag. In addition to the coke used in the blast furnace, the coke is used in the blast furnace manufacturing process by adding a binder and a curing agent in order to produce a borehole with excellent strength. However, And the strength is lowered.

In order to solve such a problem, it is possible to improve the hot strength of the briquettes produced by using the partial coke in the briquette production process, but this is only possible in the case of a steel mill using the blast furnace method at the same time. That is, when the blast furnace steelmaking method is used at the same time, it is possible to supply the minute coke from the coke making process. However, in the case of a steel mill using only the melting reduction steelmaking method, there is a problem that the minute coke can not be supplied to improve the strength of the blast furnace.

FIG. 1 is a flowchart schematically showing a method of manufacturing a shaped coal according to an embodiment of the present invention. Fig. 2 is a graph showing the change in hot strength of the briquette according to the carbonization start temperature, and Fig. 3 is a graph showing the change in hot strength of the briquetted carbon with the carbonization end temperature.

Referring to FIGS. 1 to 3, a method for producing molded coal according to an embodiment of the present invention includes the steps of providing coal (S100); A step (S200) of mixing raw char with high temperature char generated in the carbonization process of the organic material to the coal; A step S300 of mixing the curing agent and the binder in the raw coke to prepare a mixture; And molding the mixture (S400).

First, in step S100 of providing the pulverized coal, the pulverized coal is provided. Here, the powder may be powder of high grade coal, low grade coal, or coke powder produced by carbonizing coal, which is a raw material containing carbon. The high grade coal generally refers to a high grade coal having a moisture content of 10 wt% or less and having a heat value of 7,000 ㎉ / kg or more, such as bituminous coal, anthracite coal, and semi-anthracite, And the calorific value is as low as 4,000 ㎉ / ㎏ or lower, which generally means sub-bituminous coal and lignite. On the other hand, coal can be classified on the basis of the content of components such as fixed carbon powder, volatile matter and moisture. When the content of fixed carbon powder is high and the content of volatile matter and moisture is low, it can be classified as high grade coal. On the other hand, a case where the fixed carbon content is about 50 to 60% by weight and contains a large amount of volatile matter and moisture can be classified as low grade coal. Here, the volatile matter refers to a substance having components that generate various kinds of gases and tar at the time of heating.

In the step of providing the pulverized coal (S100), the carbon-containing raw material can be selectively supplied to the granular material. For example, it is possible to provide a granular coal having a particle size exceeding 0 mm and a particle size of 5 mm or less. That is, by using the coal having a small particle size by sorting the raw materials containing carbon, it is possible to produce molded coal having excellent hot strength. When the particle size exceeds 5 mm, it may be used by crushing it. The pulverized coal may be stored in the pulverized coal storage at a normal temperature, that is, at a temperature of 20 to 30 캜.

In the step (S200) of producing the raw coal, raw charcoal is produced by mixing high-temperature char produced in the carbonization process of the organic material with the above-mentioned coal. The char is a carbonaceous material that is produced during the carbonization of an organic material. In the method of producing a molded coal according to an embodiment of the present invention, a high temperature char generated by compression load, abrasion, And the raw coal is directly mixed with the pulverized coal without any process such as cooling treatment. Here, 촤 (char) can be generated in the process of carbonizing a molded mixture, and a part of carbon is partially carbonized so as to contain 2 to 15% by weight of volatile matter in the total weight of the briquette to produce a high temperature char , So that the generated char can also contain 2 to 15% by weight of volatile matter in the total weight of char.

Here, the high temperature char can be directly mixed into the granules in a granular state, that is, a powder state, having a particle size exceeding 0 mm and a size of 1 mm or less. When the particle size of char is more than 1 mm, it is preferable to limit the particle size in such a manner as to cause a decrease in the strength of the produced molded charcoal. In this case, the char can be used by selecting the particles having a particle size of 1 mm or less, and when the particle size is more than 1 mm, the char can be used after being crushed.

The char is formed during the carbonization process of the molded mixture and is mixed into the coal at high temperatures where the heated temperature is maintained in the carbonization process. Here, 촤 (char) may have a temperature of 400 to 1000 째 C, preferably 600 to 700 째 C. The temperature range of such char is determined by the temperature heated in the carbonization process, and the carbonization process of the formed mixture will be described later.

As described above, the high temperature char can have a temperature of 600 to 700 ° C, and the sensible heat corresponding thereto is about 1000 kJ / kg ° C. In this case, when the high-temperature char is uniformly mixed into the pulverized coal having a temperature of 20 ° C at 5 wt%, 10 wt% and 15 wt% with respect to 100 wt% of the coke, the temperature of the mixed coal is about 45 ° C , 91 ° C and 137 ° C, respectively. In this way, when the temperature of the coke is directly increased by mixing the char at a high temperature with the coke at room temperature, the viscosity of the binder decreases during the mixing of the curing agent and the binder in the coke, and the binder is uniformly distributed in the mixture So that it is possible to produce molded briquettes of excellent strength. In addition, char is generated in the carbonization process of the organic material, that is, the charcoal, and can replace the minute coke as an additive for improving the hot strength of the molded charcoal.

Here, the char to be mixed with the pulverized coal may be mixed in an amount of 1 to 15% by weight based on 100% by weight of the coal mixed with the coal and char. First, when char is mixed at less than 1 wt%, the effect of raising the temperature of the coke is insignificant. In addition, when the temperature of the coking coal is increased by mixing a high-temperature char with a normal-temperature coke, the strength of the coke is generally increased. However, when the content of coke is more than 15% by weight, The shortage may interfere with the bonding between the particles, which may cause a decrease in the strength of the briquette. Therefore, it is preferable that the content of char is controlled in the range of 1 to 15% by weight based on 100% by weight of the coke.

In addition, when the content of char is in the range of 1 to 15 wt% with respect to 100 wt% of the coke, the thermal energy of the high temperature char is transferred to the coal at room temperature, ) Can be maintained at a temperature of 30 to 150 ° C. If the temperature of the coke is higher than 150 ° C, the material used as the binder may be decomposed. Therefore, it is preferable to control the content of char to 15% by weight or less and control the temperature of the coke to 150 ° C or less, The most excellent effect can be obtained.

In the step of manufacturing the mixture (S300), a mixture is prepared by mixing a hardener and a binder in a mixture in which the powder and the high-temperature char are heat-exchanged as described above.

As the hardener, at least one material selected from quicklime, slaked lime, limestone, calcium carbonate, cement, bentonite, and clay may be used. Here, the curing agent may be mixed in an amount of 1 part by weight or more and 5 parts by weight or less with respect to 100 parts by weight of the coke. That is, when the content of the curing agent is less than 1 part by weight, the bonding force between the binder and the curing agent becomes insufficient and the strength of the molded cured part decreases. In addition, when the content of the hardening agent is more than 5 parts by weight, the content of the ash in the blast furnace is increased, so that it can not serve as a fuel in the melting and gasifying furnace and the economical efficiency is lowered. Therefore, the content of the curing agent is preferably controlled in the range of 1 to 5 parts by weight based on 100 parts by weight of the coke.

As the binder, one or more materials selected from molasses, bitumen, asphalt, coal tar, pitch, starch, water glass, plastic, polymer resin and oil may be used. Here, the binder may be mixed in an amount of not less than 3 parts by weight and not more than 15 parts by weight based on 100 parts by weight of the coke. That is, when the content of the binder is less than 3 parts by weight, the bonding strength is not sufficient and the strength of the briquette is lowered. In addition, when the content of the binder is too large, there arises a problem such as adhesion when the raw coal and the binder are mixed. Therefore, the content of the binder is preferably controlled in the range of 3 to 15 parts by weight based on 100 parts by weight of the raw material.

Here, the order of mixing the curing agent and the binder in the raw material can be arbitrarily set. That is, after the raw coal is heated by mixing the powder with the char at a high temperature, the mixture may be prepared by mixing the curing agent and the binder or the binder and the curing agent sequentially, or the curing agent and the binder may be mixed simultaneously Of course it is. As a result, the viscosity of the binder is lowered in the process of mixing the curing agent and the binder in the coke, and the binder can be evenly distributed in the mixture, so that the molded bodys with excellent strength can be produced.

In the step of forming the mixture (S400), a mixture of the curing agent and the binder is formed into a predetermined shape in the raw material. Although not shown, the process of forming the mixture (S400) can continuously charge the mixture between a pair of rolls rotating in mutually opposite directions to produce molded pockets or strips. Here, the mixture is heated to a temperature elevated by a high temperature char, and the thermal energy of the mixture can be used as energy for hot forming in the molding process. Accordingly, it is possible to improve the rate of development of the strength of the briquette, and as a result, the briquette having excellent hot strength and mechanical strength can be produced.

However, the method of manufacturing the molded coal according to the embodiment of the present invention may include a step of molding the mixture (S400), a step of heating the formed mixture to carbonize the mixture ; ≪ / RTI > That is, in the case of molding the mixture by the above-described process, the molded mixture has sufficient strength as the molded body, but can be made into a molded body having higher strength by carbonizing the molded mixture by heating.

Here, the process of carbonizing the molded mixture by heating may be performed by completely carbonizing the molded mixture so as not to contain volatile components. However, in order to prevent the supply of excessive heat source, the carbonized mixture may contain not less than 2 wt% and not more than 15 wt% The molded mixture may be partially carbonized. When the molded mixture is partially carbonized to produce a shaped coal, thermal and mechanical strength can be improved as compared with general molded coal, and it is possible to generate a reducing gas in the melting gasification furnace because it contains residual volatile matter. In addition, it is economical to reduce the supply of heat source in the carbonization process owing to the thermal energy of the mixture formed from the high-temperature char.

The process of carbonizing the molded mixture by heating may be performed by heating the molded mixture in a temperature range of 400 ° C or higher and 1000 ° C or lower. When the molded mixture is carbonized by heating at a temperature of 400 to 1000 ° C, the massive briquettes produced by carbonization are strengthened by carbonization to improve the hot strength. Also, in the heating process for carbonizing the molded mixture, a high-temperature char having a heated temperature is generated during the carbonization by compression load, abrasion, etc., and the high temperature char And can be used for the production of briquettes in subsequent processes. That is, in the method for producing molded coal according to the embodiment of the present invention, the high temperature char used in the coking coal can be a char produced in the process of carbonizing the molded mixture in the previous process have.

The carbonization temperature may be in the range of 400 to 1000 ° C., but it is most effective to control the carbonization temperature in the range of 600 ° C. to 700 ° C. in order to maximize the hot strength of the briquette. Here, the carbonization temperature is maintained at 600 ° C or higher and 650 ° C or lower for the initial contact of the molded mixture, and the carbonization end temperature at which the molded mixture is contacted last is maintained at about 700 ° C, It can be controlled at a temperature of 700 ° C.

As shown in Fig. 2, the surface of the molded mixture is rapidly heated in the range of the carbonization start temperature of 600 to 650 占 폚 or less, so that a hard shell is formed in a short time. In addition, when the molded mixture expands during the dry distillation, the pressure of the hard shell can be increased to improve the hot strength.

If the carbonization start temperature is less than 600 ° C, the surface of the molded mixture is heated late to form a hard shell late, and the initial strength is weakened, so that the molded carbon is easily broken. If the carbonization start temperature exceeds 600 ° C, there is a problem that the temperature difference between the inside and the outside of the molded mixture becomes large, and thermal stress acts to increase the occurrence of cracks. Therefore, the carbonization initiation temperature can be controlled to 600 to 650 占 폚 or less.

When the molded mixture is heated, the molded mixture shrinks at a temperature of about 500 ° C. and shrinks at a temperature of about 700 ° C. When the mixture is heated to a second shrinkage temperature, the density of the molded mixture becomes high, The substrate is strengthened and the hot strength is increased. FIG. 3 shows that the hot strength of the molded mixture increases until the carbonization end temperature reaches a value near about 700 DEG C, and then converges to a constant value.

Thus, in the process of carbonizing the molded mixture, it is most effective to control the carbonization temperature in the range of 600 to 700 ° C. in consideration of the carbonization start temperature and the carbonization end temperature. In this case, the high-temperature fine char generated at the time of carbonization has a temperature of 600 to 700 ° C, and the fine char having the above-mentioned temperature range can be used for the production of the briquette in a subsequent process.

FIG. 4 is a view schematically showing an apparatus for manufacturing a shaped coal according to an embodiment of the present invention. It should be understood that the apparatus for producing molded-on-carbon shown in FIG. 4 schematically shows an embodiment of the present invention, and the structure thereof is not limited thereto and can be variously changed. Further, the description of the contents overlapping with the above-described method of producing a briquette in the following description related to the briquette making device will be omitted.

Referring to FIG. 4, the apparatus for producing molded coal according to the embodiment of the present invention includes a coal powder storage unit 10 for storing coal powder; A char storage unit 20 for storing a high temperature char generated in the carbonization process of the organic material; The raw coal is mixed with the coal provided from the coal storage part 10 and the char provided from the char storage part 20 to prepare a mixture by mixing the curing agent and the binder in the raw coal A mixing portion 50; And a molding part 60 for molding the mixture supplied from the mixing part 50.

The pulverized coal storage (10) stores pulverized coal. The pulverized coal may contain at least one powder selected from bituminous coal, bituminous coal, anthracite coal, lignite and coke. Herein, the powder is selected so as to have a particle size of 5 mm or less, or in the case of exceeding 5 mm, it can be crushed and stored at room temperature.

The char storage unit 20 stores a high temperature char generated in the carbonization process of the organic material. The stored char is stored in the char storage 20 at a high temperature that is generated during the carbonization process of the formed mixture, that is, the temperature heated during the carbonization process. Here, the stored char may have a temperature of 400 to 1000 ° C, and preferably 600 to 700 ° C as described above. In addition, the stored char can be sorted to have a particle size of 1 mm or less, or to be crushed and stored at a high temperature when the particle size exceeds 1 mm.

The mixing unit 50 mixes the coal powder supplied from the coal storage unit 10 with the high temperature char supplied from the char storage unit 20 to produce a coking coal. Here, the coking coal is transferred to the coal powder at room temperature provided from the coal storage unit 10 and mixed with the thermal energy of the high-temperature char supplied from the char storage unit 20, Lt; / RTI > Further, the mixing portion 50 mixes the curing agent and the binder in the coke to produce a mixture. Here, the curing agent may be stored in the curing agent storage unit 30, and the binder may be stored in the binder storage unit 40, respectively. That is, the mixing unit 50 first receives coal and high temperature char from the coal storage unit 10 and the char storage unit 20 and mixes them to produce a raw coal, A binder and a curing agent are separately supplied from the binder storage part 30 and the binder storage part 40 to prepare a mixture by mixing with coking coal. In this case, the order of mixing the curing agent and the binder in the coke oven may be arbitrarily set. The mixing portion 50 may be formed by mixing the powder with a char at a high temperature to prepare a cured coke, The mixture may be prepared by mixing the binder and the curing agent sequentially, or the curing agent and the binder may be simultaneously mixed with the coking agent to prepare a mixture.

The shaping section 60 shapes the mixture provided from the mixing section 50. As described above, the forming section 60 may include a pair of rolls rotating in mutually opposite directions. That is, the mixture provided from the mixing section 50 is supplied between a pair of rolls, and the mixture is compressed by the roll, thereby producing a molded mixture, that is, a molded product. Here, it is needless to say that the molded product itself can be used directly as the briquetted coal to be charged into the melting gasifier.

The molded product manufacturing apparatus according to the embodiment of the present invention may include a carbonization unit 70 for heating and carbonizing a molding provided from the molding unit 60, . That is, although the molded product has sufficient strength as the molded carburetor, the molded product can be carbonized from the carbonized portion 70 to produce molded charcoal having higher strength.

Although not shown, the carbonated portion 70 may include a hot air generating path for supplying a high temperature gas into the carbonized portion 70. The temperature of the gas supplied from the hot air generating path may be 400 to 1000 ° C., Lt; RTI ID = 0.0 > 600 C < / RTI > As a result, the surface of the molded article can be rapidly heated, the density in the molded article can be increased, and the hot strength of the molded molded article can be increased.

The molded product is carbonized by the carbonized portion 70 to be formed into a carbide, and the formed carbide is discharged to the separating portion 80. The carbide includes massive briquettes and granular char, and the bifurcating unit 80 divides the carbide provided from the carbonization unit 70 into large-sized briquettes and granular particles, that is, Classify. Here, the finally produced massive briquettes are stored in the briquette storage section 90 and provided as a melter-gasifier for melting the reduced iron in a melting and reducing facility, and the high-temperature minus char produced in the molding process And is stored in a char storage unit 20 and used in a subsequent process for producing a blast furnace.

FIG. 5 is a schematic view of a melting and reducing equipment using a blast furnace manufactured according to an embodiment of the present invention. Herein, the melter-reducing equipment is provided with the blast furnace manufactured according to the embodiment of the present invention to manufacture molten iron.

The melt reduction equipment includes a melt gasification furnace (110) and a fluidized-bed reduction reactor (120). Other devices may also be included if desired. In the fluidized-bed reduction reactor (120), iron ore is charged and reduced. The iron ore charged in the fluidized-bed reduction reactor 120 is pre-dried and then reduced iron while being passed through the fluidized-bed reduction reactor 120. The fluidized-bed reduction reactor 120 receives a reducing gas from the melter-gasifier furnace 110 and forms a fluidized bed, that is, a packed bed, therein.

Since the briquettes produced according to the embodiment of the present invention are charged into the melter-gasifier 110, a coal-filled layer is formed inside the melter-gasifier 110. A dome portion 115 is formed on the upper portion of the melting gasification furnace 10. That is, a larger space is formed compared with other portions of the melting and gasifying furnace 110, and a high-temperature reducing gas is present therein. Therefore, the briquettes charged into the dome portion 115 by the high-temperature reducing gas can be easily differentiated.

However, since the briquettes produced according to the embodiment of the present invention have a high hot strength, they are not differentiated in the dome portion of the melter-gasifier furnace 110 but fall down to the lower portion of the melter-gasifier furnace 110. The briquettes falling into the lower portion of the melting and gasifying furnace 110 are thermally decomposed and exothermically react with oxygen supplied through the tuyere 130. As a result, the briquettes produced in accordance with the embodiment of the present invention can be used as a heat source for maintaining the melting gasifier 110 at a high temperature.

While the preferred embodiments of the present invention have been described and illustrated above using specific terms, such terms are used only for the purpose of clarifying the invention, and the embodiments of the present invention and the described terminology are intended to be illustrative, It will be obvious that various changes and modifications can be made without departing from the spirit and scope of the invention. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be regarded as being within the scope of the claims of the present invention.

10: a coal storage unit 20: a char storage unit
30: Curing agent storage part 40: Binder storage part
50: mixing section 60: molding section
70: carbonized portion 80:
90:

Claims (16)

A process of providing coal;
A step of mixing coke having a temperature of 400 to 1000 ° C. produced in the carbonization process of the organic material into the coal to produce a coke;
Preparing a mixture by mixing a curing agent and a binder in the raw coke;
Molding the mixture; And
And heating and carbonizing the molded mixture.
The method according to claim 1,
Wherein the pulverized coal comprises at least one powder selected from bituminous coal, bituminous coal, anthracite coal, lignite and coke.
The method according to claim 1,
The process for producing the coke includes:
A method for manufacturing a briquette, comprising mixing coal at room temperature and the char.
The method according to claim 1,
Wherein the char is mixed in an amount of 1 to 15% by weight based on 100% by weight of the coke.
The method according to claim 1,
The pulverized coal has a particle size of 5 mm or less,
Wherein the char has a particle size of 1 mm or less.
The method according to claim 1,
Wherein the temperature of the coke is in the range of 30 to 150 占 폚.
The method according to claim 1,
The curing agent,
1 to 5 parts by weight based on 100 parts by weight of the coke,
A method of manufacturing a molded coal comprising at least one material selected from quicklime, slaked lime, limestone, calcium carbonate, cement, bentonite, and clay
The method according to claim 1,
Wherein the binder comprises:
3 to 15 parts by weight based on 100 parts by weight of the raw material are mixed,
Wherein the at least one material is selected from the group consisting of molasses, bitumen, asphalt, coal tar, pitch, starch, water glass, plastic, polymer resin and oil.
delete The method according to claim 1,
The carbonization process may include:
Wherein the molded mixture is carbonized by heating at a temperature of 400 to 1000 占 폚.
The method according to claim 1,
Wherein the char is produced by carbonizing the molded mixture by heating.
The method of claim 11,
Wherein the char contains 2 to 15% by weight of volatile components based on 100% by weight of char.
A pulverized coal storage for storing pulverized coal;
A char storage unit for storing a char having a temperature of 400 to 1000 DEG C generated in the carbonization process of the organic material;
A mixer for mixing the coal powder supplied from the powder storage part with char supplied from the char storage part to produce a coke, mixing the coke with a binder to prepare a mixture;
A molding part for molding a mixture provided from the mixing part; And
And a carbonized portion for heating and carbonizing the molding material provided from the molding portion.
delete 14. The method of claim 13,
Further comprising a classifier for classifying the carbide provided from the carbonized portion into massive briquettes and granular char,
And a char of the granular particles classified from the classification unit is stored in the char storage unit.
16. The method of claim 15,
Wherein the massive shaped coal is provided as a melting gasifier for melting reduced iron in a melting and reducing facility.

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