JP2006328226A - Method for producing coke and installation for producing coke - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing coke, by which the strength of the coke can be improved, while preventing the lowering of productivity and the enhancement of cost, and to provide an installation for producing the coke. <P>SOLUTION: This method for producing the coke is characterized by comprising a process for classifying at least one portion of coal as a raw material of the coke into coal having large particle diameters and coal having small particle diameters, the first crushing process for crushing the coal having the large particle diameters, a molded coal-producing process for producing molded coal from the coal crushed in the first crushing process, the first compounding process for compounding the coal having the small particle diameters, the second crushing process for crushing the compounded coal, and then a process for charging the crushed coal having the small particle diameters together with the molded coal and the remainder of the coal as the raw material of the coke into a coke oven. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a production method and production equipment for coke used as an iron-making raw material.

  Coke used as a raw material for iron making desirably has a high strength because it deteriorates the air permeability of the blast furnace when pulverized when charged into the blast furnace. In order to produce high-strength coke, the smaller the coal particle size of the coke raw material, the better. On the other hand, the small particle size coal has problems such as difficulty in handling when charged in the coke oven, Since productivity does not improve, it is considered preferable to use coal having a particle size in the range of, for example, about 0.5 mm to 6 mm. In order to obtain such a particle size range, the pulverized coal can be made into a coal having a particle size of only 0.5 mm to 6 mm by sieving, except for those less than 0.5 mm and exceeding 6 mm. However, even if it exceeds 6 mm, it is pulverized again and used as a raw material for coke, but if it is less than 0.5 mm, it will be disposed of without a preferred use, resulting in processing costs and undesirable yield improvement. Since the filling rate of coal in the coke oven also decreases, this is not a realistic method.

  As a method of adjusting the particle size by specifying only the upper limit of the particle size of coal for charging coke ovens, the coal is classified with a sieve having a sieve that can obtain a predetermined particle size, and the under-sieved portion is used as a raw material for coke. In addition, a method is known in which pulverization and classification are repeated until the coarse particle portion on the sieve passes through the sieve (see, for example, Patent Document 1). In the method described in Patent Document 1, the sieve grain is changed between coal rich in active ingredients (soft coal) and coal rich in active ingredients (hard coal), and coal particles not rich in active ingredients. The diameter is made smaller and used as a raw material. Coal whose particle size is adjusted to each is appropriately mixed and charged into a coke oven, and coke having a higher strength than conventional ones is produced.

In addition, by increasing the packing density of coal in the coke oven, it is possible to improve productivity and to produce high-strength coke. Of the coal for charging a coke oven, which is classified and pulverized with a crusher with the classified large particle size and small particle size or less and charged into the coke oven together with the previously classified medium particle size coal. A particle size adjustment method is also known (see, for example, Patent Document 2).
JP 56-32587 A Japanese Patent Laid-Open No. 11-302662

  However, in the method described in Patent Document 1, it is necessary to repeatedly crush coal having a predetermined particle size or more until it becomes smaller than the predetermined particle size, and the same coal is sieved and pulverized many times. Productivity decreases.

  Moreover, although the method of patent document 2 is the maximum number of times of crushing about the same coal, since the coal below the small particle diameter obtained by crushing is again crushed with a crusher, a fine particle increases. Thus, even if a distribution close to the ideal coal particle size distribution state in which the coke oven is in a close-packed state is obtained, it is not desirable in actual operation. Moreover, since the crushed coal is classified into three stages of large particle size, medium particle size, and small particle size, the equipment cost for sieving increases.

  Accordingly, an object of the present invention is to provide a coke production method and a production facility capable of improving the coke strength while solving such problems of the conventional technology and suppressing a decrease in productivity and an increase in cost. is there.

The features of the present invention for solving such problems are as follows.
(1) A classification step of classifying at least a part of coal as a coke raw material into coal having a large particle size and coal having a smaller particle size than the coal, and first pulverization for pulverizing the coal having a large particle size A step, a forming coal manufacturing step of manufacturing a coal using the coal pulverized in the first pulverizing step, a first compounding step of compounding the coal having a small particle diameter, and pulverizing the compounded coal A coke production method, comprising: charging the coking coal, the coal having a small particle diameter, and the remainder of the coal as the coke raw material into a coke oven after the second pulverizing step.
(2) a classifying step of classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, A coal-forming process for producing coal using coal treated in one pulverization process, a compounding process for compounding the small-particle-size coal and the remainder of the coal as the coke raw material, and the compounded coal A coke production method, wherein the coke oven is charged together with the forming coal after the second crushing step of crushing the slag.
(3) A classification step of classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, A coal forming process for producing coal using the coal treated in one grinding step, a first blending step for blending coal with a small particle size, and a second grinding for grinding the blended coal. And then the second coal blending step for blending the remainder of the coal as the coke raw material and the third milling step for comminuting the blended coal, and then the molding coal and the second milling. A method for producing coke, wherein the coke is charged together with the coal treated in the process.
(4) A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. A classification process for classifying a large coal and a coal having a smaller particle diameter than the coal, a first pulverization process for pulverizing the coal having a large particle diameter, and the coal treated in the first pulverization process A first coal blending step for blending the coal with a small particle size and / or the remainder of the coal (X), and a second mill for grinding the blended coal. A coke production method, wherein the coal (X) containing the coal and the coal (Y) are charged into a coke oven after being treated by a process.
(5) A method of producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X),
A classification step of classifying at least a part of the coal (X) into a coal having a large particle size and a coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, and the first pulverization A blended coal blending step of blending the coal having a small particle size with the remainder of the coal (X) and the coal (Y), and the blending step. A method for producing coke, characterized in that after being treated in a second pulverization step for pulverizing coal, the coke oven is charged together with formed coal.
(6) A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. A classification process for classifying the coal with a large particle size and a coal with a small particle size, a first pulverization step for pulverizing the coal with a large particle size, and molding coal using the coal treated in the first pulverization step Processed by a first coal blending step for blending a coal-forming process to be manufactured, a coal having a small particle diameter and / or a remainder of the coal (X), and a second milling step for grinding the blended coal And after processing by the 2nd compounding process which mixes the coal (Y), and the 3rd crushing process which grinds the compounded coal, the coal (X) containing the formed coal, and the coal (Y ) In a coke oven.
(7) A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. A classification process for classifying the coal with a large particle size and a coal with a small particle size, a first pulverization step for pulverizing the coal with a large particle size, and molding coal using the coal treated in the first pulverization step Processed by a forming coal manufacturing process to be manufactured, a first compounding process for compounding coal with a small particle size, and a second pulverizing process for pulverizing the compounded coal, and the remainder of the coal (X) and the above The coal (X) and the coal (Y) containing the formed coal after being treated by the second blending step of blending the coal (Y) separately and the third grinding step of separately grinding the blended coal. ) In a coke oven.
(8) A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein the coal (X ′) A classification step of classifying at least a part of the coal into a coal with a large particle size and a coal with a particle size smaller than the coal, a first pulverization step of pulverizing the coal with a large particle size, and the first pulverization step. A first coal blending step for blending a coal with a small size and / or the remainder of the coal (X ′); A coke production method, wherein the coal (X ′), the coal (Y ′) containing the coal and the coal (Y ′) and the coke oven are charged after the second crushing process.
(9) A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′),
A classification step of classifying at least a part of the coal (X ′) into a coal having a large particle size and a coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, A blending step of blending the coal having a small particle size with the remainder of the coal (X ′) and the coal (Y ′), and a coal casting process for producing the coal using the coal treated in the pulverization step; A method for producing coke, wherein the blended coal is treated in a second pulverization step and then charged into a coke oven together with the coal.
(10) A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein the coal (X ′) A classification step of classifying at least a part of the coal into a coal with a large particle size and a coal with a particle size smaller than the coal, a first pulverization step of pulverizing the coal with a large particle size, and the first pulverization step. A first coal blending step for blending a coal with a small size and / or the remainder of the coal (X ′); A second pulverizing step for pulverizing the coal (Y ′) and a third pulverizing step for pulverizing the mixed coal, The coal (X ′) and the coal (Y ′) containing are charged into a coke oven. Manufacturing method of coke to.
(11) A method for producing coke using coal (X ′) having a large amount of inert gas and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein the coal (X ′) A classification step of classifying at least a part of coal into a coal with a large particle size and a coal with a small particle size, a first pulverization step of pulverizing the coal with a large particle size, and the coal treated in the first pulverization step The coal is produced by using a coal-coal production process for producing coal-coal, a first blending process for blending the coal having a small particle diameter, and a second grinding process for grinding the blended coal. The coal containing the formed coal after being treated by a second blending step in which the remainder of X ′) and the coal (Y ′) are blended separately and a third grinding step in which the blended coal is ground separately. (X ′) and the coal (Y ′) are charged into a coke oven. The method of manufacturing box.
(12) The coke according to any one of (1) to (11), wherein the coal is classified into a coal having a particle size set within a range of 1 to 20 mm and a coal having a large particle size and a coal having a small particle size. Production method.
(13) A classifier that classifies a part of coal as a coke raw material into coal having a large particle diameter and coal having a small particle diameter, a first pulverizer that pulverizes the coal having a large particle diameter, A coal-coal production facility that produces coal using coal that has been processed by one pulverizer, a compounding tank that mixes the small-particle-size coal and the remainder of the coal as the coke raw material, and the compounding tank Coke comprising: a second pulverizer for pulverizing the blended coal; and a conveyor for conveying the coal treated with the second pulverizer and the coal to the coke oven. production equipment.
(14) A classifier that classifies a part of coal as a coke raw material into coal having a large particle diameter and coal having a small particle diameter, a first pulverizer that pulverizes the coal having a large particle diameter, A coal-coal production facility that produces coal using coal treated by one pulverizer, a first blending tank that blends coal with a small particle diameter, and coal blended in the first blending tank. A second pulverizer for pulverization, a second compounding tank for compounding the remainder of the coal as the coke raw material, a third pulverizer for pulverizing the coal compounded in the second compounding tank, and the molded coal A coke production facility comprising: a coke for conveying the coal treated by the second pulverizer and the coal treated by the third pulverizer to a coke oven.

  In the present invention, at least a part of coal as a raw material for coke is divided into coal having a large particle size and coal having a small particle size, and coal is produced using coal having a large particle size. It is mixed with the remainder of the coal that was not used as a raw material for coking coal and charged into a coke oven to produce coke. The reason why the raw coal is classified and the formed coal is manufactured using the coal having a large particle size is as follows.

  Various structural components such as inert trinit such as vitrinite (V), semi-fujinit (SF), and Fujinit (F) are distributed in the coal, and physicochemical characteristics such as hardness and softening and melting properties are different for each structure. . Generally, the hardness is V <SF <F and the softening and melting property is V> SF> F. Therefore, the relatively large and coarse particles of coal are hard and the proportion of the relatively hard inert component is high in the particles and the softening and melting property is low, that is, the caking property is low. is there. Since such particles also have different expansion and contraction behavior from the softening and melting part of coal, defects are likely to occur at the particle interface, causing a decrease in strength. Therefore, in order to increase the coke strength, it is considered effective to suppress the generation of defects at the particle interface by crushing such coarse particles to reduce the particle size. However, if the particle diameter is reduced in this way, the specific surface area is increased, so that it is necessary to increase the amount of softening melt for fusing the particles. A method was later devised for use as forming charcoal.

  That is, in the method of classifying coal and producing coal using raw materials obtained by pulverizing coal with a large particle size, the effect of reducing the distance between particles due to compaction by the production of coal and the effect of modification by adding a binder. Since it can be expected, high strength coke can be produced even with poorly caking coal. In addition, when the coal is classified, even in the pulverized coal portion having a small particle size coal, the inert rich tissue ratio that causes defects in the coke is reduced by removing the large particle size coal, It is also expected to improve the strength of coke produced from the portion of coal that was not cast coal.

  It is preferable that the coal is produced by mixing the pulverized coal and a binder and molding them by pressure. After classifying at least a part of the coal as a coke raw material into a coal having a larger particle size and a coal having a smaller particle size than the coal, and pulverizing a part or all of the coal having a larger particle size, To do. As the binder (binding agent), petroleum-based asphalt pitch (ASP), propane dealkylated oil (PDA), coal-based tarpitch, tar, targe, polymer-based polyvinyl alcohol (PVA), etc. should be used. Can do. For molding, for example, a double roll press is used, and cold or steam heating molding is performed. It is possible to eliminate the binder by blending coal with high softening and melting properties and hot forming. Further, a compression molding machine, a pelletizer, an extrusion molding machine or the like may be used as the molding apparatus. Arbitrary shapes, such as a pillow shape, an egg shape, and a Macek shape, can be used for the shape of the charcoal. The size of the coal is preferably about 10 cc to 100 cc in view of moldability and productivity.

  In the present invention, the coal used as the raw material for forming coal may be used by at least partly classifying coal and pulverizing coal classified as coal having a large particle size. Therefore, if there is a shortage of coal as raw material for coal, at least part of the coal that has not been classified, which is the remainder of the coal that will be the coke raw material, when part of the coal that will be the coke raw material is classified. Can be used as a raw material for the coal. Since the coal that has not been subjected to the classification treatment contains a relatively large amount of coarse-grained inert, it is preferable to use the coal as a raw material for the formed coal in preference to the coal classified into the coal having a small particle size.

  Furthermore, when the coal used as the raw material for the coal is insufficient, at least a part of the coal classified into the coal having a small particle size can be pulverized to obtain the raw material for the coal. The vitrinite component is concentrated in the coal with a small particle size, which is under the sieve, and the caking property is better than before classification. Further, since the particle size is already small, it is difficult to generate cracks having a size that lowers the strength during the coking process. Therefore, it is preferable to preferentially use coal that has not been subjected to the classification treatment as a raw material for forming coal.

  Coal classified as having a small particle size by classification treatment is the remainder of the coal that is the raw material for coke, together with coal that has not been classified, or separately from coal that has not been classified. Blend in and grind. Then, the coke is manufactured by charging the coke oven together with the manufactured coal.

  From the above, the present invention provides a classification step of classifying at least a part of coal as a coke raw material into coal having a large particle size and coal having a smaller particle size than the coal, and pulverizing the coal having a large particle size The first pulverizing step, the coal pulverizing step for producing coal using the coal pulverized in the first pulverizing step, and the second pulverizing step for pulverizing the coal having a small particle size. After that, the coke is produced by charging the coal obtained by the forming coal and the second pulverization step and the remainder of the coal as the coke raw material into a coke oven. For the classification of coal having a large particle size and coal having a small particle size, it is sufficient to perform sieving using a sieve. Therefore, as a classification process, for example, a sieve is used to place coal on and below the sieve. Classify. As a classifier used in the classification process, an air classifier, a fluidized bed classifier, or the like can be used in addition to the sieve. In the first pulverization step, pulverization is performed on the sieve having a particle size larger than the sieve mesh to reduce the particle size. For the under sieve having a particle size equal to or smaller than the sieve mesh, a pulverization process is performed in the second pulverization step. Coal having a large particle size is removed by the classification step, and the proportion of coarse particles is reduced, so that it is possible to reduce the pulverization ability in the second pulverization step and pulverize. Generation | occurrence | production of the fine particle size coal is suppressed at the time of a grinding | pulverization process, and the particle size distribution of coal is improved as a whole.

  When all the coal used as the coke raw material is processed in the above classification process, the remaining coal used as the coke raw material naturally does not exist. On the other hand, when only a part of the coal used as the coke raw material is processed in the above classification process, the remainder of the coal used as the coke raw material is supplied to the coke oven together with the formed coal and the coal processed as the small particle size coal in the classification process. Insert. That is, a classifying step of classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, and the first A coal-forming process for producing coal using the coal treated in the pulverization step, a compounding step for compounding the small-particle-size coal and the remainder of the coal as the coke raw material, and the compounded coal It is desirable to charge the coke oven after the second pulverizing step.

  When only a part of coal as a coke raw material is processed in the above classification process, the quality of the coal such as hardness and the amount of inert differs depending on the brand, so that it is desirable to pulverize by adjusting the grinding conditions for each brand. Accordingly, a plurality of blending tanks are preferably arranged for each coal quality or brand, and a plurality of crushers are also arranged correspondingly, and the remainder of the coal is desirably separately pulverized. That is, a classifying step of classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, A coal forming process for producing coal using coal pulverized in the pulverizing step, a first compounding step for compounding coal with a small particle size, and a second pulverizing step for pulverizing the compounded coal. And the remainder of the coal as the coke raw material is pulverized by the second blending step of blending the remainder of the coal as the coke raw material and the third grinding step of pulverizing the blended coal, It is desirable to charge the coke oven with the coal pulverized in the second pulverization step and the coal. For the remainder of the coal that will be the coke raw material that is not treated in the classification step, the third pulverization step should be omitted if it is fine-grained or has a suitable particle size distribution for charging into the coke oven. Is also possible.

  Moreover, when processing only a part of coal used as a coke raw material by said classification process, it is desirable to process hard coal preferentially. That is, when producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), at least a part of the coal (X) having a high hardness has a large particle size. A classification step for classifying coal and coal having a particle size smaller than that of the coal, a first pulverization step for pulverizing the coal having a large particle size, and molding using the coal pulverized in the first pulverization step A first coal blending step for blending the coal with a small particle size and / or the remainder of the coal (X); a second milling step for grinding the blended coal; It is preferable to charge the coking coal, the remainder of the coal (X), and the coal (Y) into a coke oven.

  Further, coal (Y) can also be blended in the first blending step and pulverized in the second pulverization step. That is, a method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. Classifying into large coal and coal with small particle size, first pulverizing step for pulverizing coal with large particle size, and producing coal by using coal pulverized in the first pulverizing step After processing by the forming coal manufacturing process to be performed, the blending process of blending the small particle size coal, the remainder of the coal (X) and the coal (Y), and the second grinding process of grinding the blended coal It is desirable to charge the coke oven together with the coal.

  Also, the quality of coal, such as hardness and inert amount, varies depending on the brand, and it is desirable to pulverize by adjusting the grinding conditions for each brand. Therefore, it is preferable that a plurality of blending tanks are arranged according to quality or brand of coal, and a plurality of crushers are also arranged correspondingly. Coal (X) having a higher hardness and coal having a hardness lower than that of the coal (X) ( Y) and a method of producing coke using a classification step of classifying at least a part of the coal (X) into coal having a large particle size and coal having a small particle size, and the coal having a large particle size. A first pulverization step of pulverizing the coal, a formed coal production step of producing a formed coal using the coal pulverized in the first pulverization step, the coal having a small particle diameter and / or the coal (X) The first blending step for blending the remaining portion and the second blending step for grinding the blended coal, the second blending step for blending the coal (Y), and the blended coal are ground. After processing by the third crushing step (X) and it is desirable that the the coal (Y) are charged to the coke oven.

  Furthermore, in the above, it is also possible to mix | blend the remainder of coal (X) and coal (Y) using a separate mixing tank, respectively, and to grind | pulverize for each mixing tank. That is, a method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. Classifying into large coal and coal with small particle size, first pulverizing step for pulverizing coal with large particle size, and producing coal by using coal pulverized in the first pulverizing step Processed by a forming coal manufacturing process, a first compounding process for compounding the coal having a small particle diameter, and a second pulverizing process for pulverizing the compounded coal, and the remainder of the coal (X) and the coal After processing by the 2nd compounding process which mixes (Y) separately, and the 3rd crushing process which grinds the compounded coal separately, the above-mentioned coal (X) and the above-mentioned coal (Y) are made into a coke oven. It is desirable to charge.

  Moreover, it is a method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a particle size. Classifying into large coal and coal with small particle size, first pulverizing step for pulverizing coal with large particle size, and producing coal by using coal pulverized in the first pulverizing step And a first blending step of blending the coal having a small particle diameter and / or at least a part of the remainder of the coal (X) and / or at least a part of the coal (Y), A second pulverizing step of pulverizing the blended coal, a second blending step of blending the remaining coal not treated by the second pulverizing step, and a third pulverizing the blended coal. After processing by the pulverization process, the coal (X) And said coal (Y) it is possible to select the method it is also desirable to charged into the coke oven.

  In order to group coal, which is usually a coke raw material composed of multiple brands, into high-hardness coal (X) and low-hardness coal (Y), use predetermined criteria that are set appropriately. Thus, it may be classified into coal (X) whose hardness is higher than a predetermined standard and coal (Y) whose hardness is lower than a predetermined standard. For example, when coke is produced using coal brands A, B, and C, coal brand A having the highest average hardness is classified as coal (X) having high hardness, and coal brands B and C are classified into coal having low hardness ( Y). In addition, when using the coal brands D, E, and F, which have lower hardness than the coal brands A, B, and C, the predetermined standard is set low and the coal brands D, E, and F are relatively hard. Can be classified into coal (X) having high hardness. It is desirable to set the predetermined standard so that the cost and production efficiency of coke production are optimized in consideration of the brand of raw material coal used, the production capacity of coke, and the like. Further, as is clear from the above example, the high hardness coal (X) and the low hardness coal (Y) are not limited to a single brand, but are composed of a plurality of brands of coal. It is what you have.

  The reason why the hard coal is preferentially treated in the classification process is that the coal having a large particle size among the coal as the coke raw material is mainly high hardness coal, and as described above, the particles are relatively hard. This is because the existence ratio of the inert component is high and the caking property is low. That is, when not performing the process in a classification process about all the raw material coals, it is preferable to prioritize coal (X) with high hardness and to perform a classification process. It is effective if only a part of the coal (X) is processed in the classification process to produce cast coal. For example, the coal is classified into coal having a large particle size and coal having a small particle size, and the coal having the large particle size. Even if the amount is about 10% of the total amount of coal, coke strength can be improved by preferentially classifying and crushing coal (X) in the entire raw material. The classification of coal (X) and other coals is not strict, and the average hardness is defined for each brand of coal, and if the average hardness exceeds a predetermined standard, it will be classified as coal (X). What is necessary is just to classify | categorize and it does not interfere even if coal (X) contains the coal of the hardness below a predetermined standard partially. The particle size distribution is improved as the proportion of coal (X) to be processed in the classification process is increased, but the processing cost is also increased.

  It is known that the hardness of coal varies depending on the production area. It is desirable to use HGI as a predetermined standard when classifying coal (X) when preferentially treating high hardness materials in the classification process, and HGI (Hard Grove Index) which is an index representing pulverizability. : According to JIS-M-8801) is preferably 80 or less. As the coal having an HGI of 80 or less, it is preferable to use non-thin coal. Many non-thin coals have high hardness of HGI 80 or less and are inexpensive coals. Judgment of the hardness of coal with respect to a predetermined standard can be performed, for example, by measuring an average HGI for each brand of coal and comparing these average values with a predetermined standard.

  Moreover, when processing only a part of coal used as a coke raw material by said classification | category process and a 1st grinding | pulverization process, it is desirable to process coal with much inert amount preferentially. That is, a method for producing coke using coal (X ′) having a large amount of inert gas and coal (Y ′) having a smaller amount of inert than the coal (X ′), and comprising at least the coal (X ′). A classification step of classifying a part of the coal into a coal with a large particle size and a coal with a particle size smaller than the coal, a first pulverization step of pulverizing the coal with a large particle size, and pulverization in the first pulverization step A first coal blending step of blending the coal with a small particle size and / or the remainder of the coal (X ′), and a blended coal It is preferable to charge the coal (X ′), the coal (Y ′), and the coke oven after the second pulverization step.

  On the other hand, coal (Y ′) with a small amount of inert can be blended with coal (X ′) with a large amount of inert and pulverized. A method for producing coke using coal (Y ′) having a smaller amount of inert than coal (X ′), wherein at least a part of the coal (X ′) is composed of coal having a large particle size and small particle size. A classification step of classifying into coal, a first pulverization step of pulverizing the coal having a large particle size, and a formed coal production step of producing coal using the coal pulverized in the first pulverization step, It is charged into a coke oven after being treated by a blending step of blending the coal with a small particle size, the remainder of the coal (X ′) and the coal (Y ′), and a second grinding step of grinding the blended coal. It is desirable to do.

  Also, the quality of coal, such as hardness and inert amount, varies depending on the brand, and it is desirable to pulverize by adjusting the grinding conditions for each brand. Therefore, it is preferable that a plurality of blending tanks are arranged according to quality or brand of coal, and a plurality of crushers are also arranged correspondingly. Coal (X ′) with a larger amount of inert and the amount of inert than the coal (X ′) Is a method for producing coke using a small amount of coal (Y ′), wherein at least a part of the coal (X ′) is classified into coal having a larger particle size and coal having a smaller particle size than the coal. A classification step, a first pulverization step for pulverizing the coal having a large particle size, a formed coal production step for producing a coal using the coal pulverized in the first pulverization step, and a small particle size The first blending step of blending coal and / or the remainder of the coal (X ′) and the second milling step of pulverizing the blended coal, and blending the coal (Y ′). A second blending step and a second step of grinding the blended coal Was treated by the process of pulverization, it is preferable to charged with the coal (X ') and the coal (Y') to the coke oven.

  Furthermore, in the above, it is preferable that the remainder of coal (X ′) and coal (Y ′) are blended using separate blending tanks and pulverized for each blending tank. That is, a method for producing coke using coal (X ′) having a large amount of inert gas and coal (Y ′) having a smaller amount of inert than the coal (X ′), and comprising at least the coal (X ′). A classification step of classifying a part of the coal into a coal with a large particle size and a coal with a small particle size, a first pulverization step of pulverizing the coal with a large particle size, and the coal pulverized in the first pulverization step The coal (X) is processed by a coal forming process for producing coal using, a first blending process for blending the coal having a small particle size, and a second grinding process for grinding the blended coal. After processing by the second blending step of separately blending the remainder of ') and the coal (Y') and the third grinding step of separately grinding the blended coal, the coal (X ') and the coal It is desirable to charge coal (Y ′) into a coke oven.

  Furthermore, it is a method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein at least of the coal (X ′). A classification step of classifying a part of the coal into a coal with a large particle size and a coal with a particle size smaller than the coal, a first pulverization step of pulverizing the coal with a large particle size, and pulverization in the first pulverization step A coal forming process for producing a coal using the coal obtained, and at least a part of the coal having a small particle size and / or the remainder of the coal (X ′) and / or at least one of the coal (Y ′). A second blending step of blending the remaining coal that is not treated by the second pulverization step, and a second pulverization step of pulverizing the blended coal. And a third powder for pulverizing the blended coal It was treated by the process, and the coal (X ') and the coal (Y') which can be selected as the method it is also desirable to charged into the coke oven.

  When coal having a large amount of inert coal is used as the coke raw material, cracks are likely to occur during the coke production process, and the strength of the coke produced tends to be reduced. Therefore, coke strength can be improved by using coal with a large amount of inert coal. Therefore, in the case where the processing in the classification step and the first pulverization step is not performed for all raw material coals, it is preferable to prioritize the coal (X ′) having a large amount of inerting to perform the classification and pulverization treatment. If only a part of the coal (X ′) is treated in the classification step, it is effective. For example, the coal having a large particle size and the coal having a small particle size are separated, and the coal having the large particle size is pulverized. Even if the amount of coal to be performed is about 10% of the total amount of coal, the particle size distribution can be remarkably improved as a whole by preferentially classifying coal (X ′) in the entire raw material. The classification of coal (X ') and other coals is not strict, and the average amount of inert for each brand of coal is specified, and if the average value exceeds a predetermined standard, coal (X The coal (X ′) may partially contain coal having a hardness below a predetermined standard. Increasing the proportion of coal (X ′) to be processed in the classification step and the first pulverization step increases the coke strength, but also increases the processing cost.

  Coal is known to have different amounts of inert (non-molten component) depending on the production area. When processing a large amount of inerts preferentially in the classification process / first crushing process, the criteria for classifying coal (X ′) with a large amount of inerts are the brands of the raw coal used and the coke It is desirable to set as appropriate so that the cost and production efficiency of coke production are optimized in consideration of production facility capacity, etc., but coal with an inert amount of 35% or more is regarded as coal with a large amount of inert (X ′). It is particularly preferable to do this. As coal having an inert amount of 35% or more, it is preferable to use non-thin coal. Many non-thin coals have a high inert amount and are inexpensive. The determination of the amount of inert coal can be performed, for example, by measuring the average amount of inert for each brand of coal and comparing these average values with a predetermined standard (for example, 35% of the amount of inert).

  Therefore, when only a part of the coal used as a coke raw material is processed in the classification step and the first pulverization step, the coal is classified using both the hardness and the inert amount criteria, and the high hardness and inert amount are classified. It is desirable to preferentially treat a large amount of material in the classification step / first grinding step. Particularly preferably, the coal having an HGI of 80 or less and an inert amount of 35% or more is preferentially treated in the classification step / first pulverization step. Non-thin cohesive coal is very suitable because it has many varieties having an HGI of 80 or less and an inert amount of 35% or more and is inexpensive.

  In the classification process, when classifying coal into coal having a large particle size and coal having a small particle size, the coal is classified into a coal having a particle size set within a range of 1 to 20 mm and a coal having a large particle size and a coal having a small particle size. It is preferable to classify. As the classification particle size (the particle size at the time of classification, for example, corresponding to the sieve mesh when classified using a sieve) increases, the classification efficiency increases, but the proportion of coarse particles in the pulverized coal increases. Coke strength decreases. In particular, when it exceeds 20 mm, it is significantly reduced. On the other hand, as the classified particle size becomes smaller, the proportion of coarse particles remaining in the pulverized coal portion decreases, so the coke strength improves. However, since the classification efficiency by a sieve falls, productivity falls. In particular, a significant decrease in productivity is observed at 1 mm or less. As a result, the higher the coke strength, the lower the reflectivity (Ro) of the coal (mixed coal) used, so that low-reflectivity inexpensive coal can be used as a raw material. The cost of blended coal per production volume decreases and the merit in terms of cost increases. On the other hand, the classification efficiency decreases as the classification particle size decreases, so in order to maintain productivity, the processing capacity of the classification equipment must be increased, and the fixed cost increases. To increase. FIG. 2 shows a graph for explaining the production cost of coke when the classified particle diameter in the classification step is changed. According to FIG. 2, the total cost, which is the coke production cost per unit production of coke, tends to decrease particularly when the classified particle size is about 3 to 10 mm, when the classified particle size is about 20 mm or less. . Therefore, it is desirable that the classified particle diameter is 1 to 20 mm, particularly preferably about 3 to 10 mm in terms of cost. From the viewpoint of coke strength (drum strength (DI30 / 15)), a more desirable classified particle size is 3 to 6 mm. The classified particle size can be easily adjusted, for example, by changing the mesh of the sieve when classifying coal.

  Next, the coke production facility of the present invention will be described.

  In order to carry out the above-mentioned method for producing coke, a classifier for classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, and pulverizing the coal having a large particle size A first pulverizer, a coal forming facility for producing coal using the coal treated by the first pulverizer, a coal having a small particle size and the remainder of the coal as the coke raw material Comprising a mixing tank, a pulverizer for pulverizing coal blended in the mixing tank, and a conveyor for conveying the coal treated with the pulverizer and the coal to the coke oven. It is preferable to use a coke production facility.

  Also, the quality of coal, such as hardness and inert amount, varies depending on the brand, and it is desirable to pulverize by adjusting the grinding conditions for each brand. Therefore, it is preferable to arrange a plurality of blending tanks according to quality or brand of coal, and a plurality of crushers to correspond to the blending tanks. Using the second blending tank and the third crusher, A classifier that classifies a part into coal having a large particle size and coal having a small particle size, a first pulverizer that pulverizes the coal having a large particle size, and coal that has been processed by the first pulverizer A charcoal production facility for producing coal using the first coal blender blended with the coal having a small particle size, a second grinder for grinding the coal blended in the first compounding tank, A second blending tank for blending the remainder of the coal as the coke raw material, a third grinder for grinding the coal blended in the second blending tank, and a coal treated by the second grinder Transporting the coal treated with the third crusher and the coal to the coke oven It is preferred to use a coke manufacturing equipment, characterized in that comprising a conveyor for.

  In the blending tank, in addition to storing the coal, there is an effect of homogenizing the properties of the coal when charging into the coke oven by sequentially charging a plurality of brands of coal and cutting out after storage in the blending tank. Only a single brand of coal may be stored in the same blending tank, but if it is mixed with other brands of coal on the conveyor after crushing, the brand of coal charged into the coke oven will be Partial bias is prevented.

  A sieve for classifying a part of the coal carried out from the coal yard, a first crusher for crushing the coal on the sieve classified by the sieve, and at least a sieve below the sieve classified by the sieve A first blending tank for mixing and storing coal, a second pulverizer for pulverizing coal cut out from the first blending tank, and the remaining coal transported from the coal yard is stored. The second mixing tank, the third pulverizer for pulverizing the coal cut out from the second mixing tank, the coal pulverized by the second pulverizer and the third pulverizer. It is preferable to use a coke production facility characterized in that it comprises a transporter for transporting the coal and the formed coal to a coke oven. Coal other than the unsieved coal classified by the sieve can be stored in the first blending tank. In this case, the mixing ratio of coals of different brands is increased, and the quality of the product coke is more uniform.

  FIG. 1 is a schematic view showing an embodiment of a coke production facility of the present invention.

  Of coal yards 1 and 2, a part of the coal in coal yard 1 is unloaded and sieved by sieve 3, and the sieve a having a particle size exceeding the predetermined particle size is pulverized by first pulverizer 4 and molded. The charcoal manufacturing equipment 11 is used to manufacture the charcoal. The sieve b is put into the first blending tank 5 as it is. The remainder of the coal in the coal yard 1 is appropriately transported to the first blending tank 5 and the second blending tanks 6 and 7 as they are. The coal in the coal yard 2 is also appropriately transported to the first blending tank 5 and the second blending tanks 6 and 7. The coal in the first mixing tank 5 is appropriately pulverized by the second pulverizer 8. The coal in the second compounding tank 6 is appropriately pulverized by the third pulverizer 9 and the coal in the second compounding tank 7 is appropriately pulverized by the third pulverizer 10. By being conveyed while being mixed, etc., it is homogenized to some extent and charged into the coke oven.

  In FIG. 1, the second blending tanks 6 and 7 are each installed in three tanks, the coal in the second blending tank 6 is crushed by the third crusher 9, and the coal in the second blending tank 7 is the third By crushing with the pulverizer 10, crushing by brand can be performed.

  When using non-slightly cohesive coal and strongly caking coal as raw material coal, it is desirable that coal yard 1 be non-slightly caking coal and coal yard 2 be strongly caking coal.

  Coke was manufactured using the coke manufacturing equipment shown in FIG. Non-slightly caking coal 80 mass% and strong caking coal 20 mass% (HGI: about 85, inert amount about 30% by volume) are used as the raw material coal. The non-slightly caking coal (HGI: about 75, the amount of inert about 36 volume%) which corresponds is sieved (classification process). Coal of 6 mm or less, which is under the sieve, was put in the first blending tank together with a part of the remaining coal, and then pulverized at 570 rpm (second pulverization step) with a hammerhead type second pulverizer. The remaining non-slightly caking coal and the strongly caking coal are separately pulverized at 600 rpm (third pulverization step) with a hammerhead type third pulverizer, and then sieved and pulverized. The coke was mixed with the non-slightly caking coal that was subjected to the above process and charged into a coke oven to produce coke.

  On the other hand, the coals for 0 mass%, 10 mass%, and 20 mass% of the total coal amount were produced by the coal production facility. The production conditions of the coal were fixed, and asphalt pitch, tar pitch, tar, tar tar were used as the binder, and the mixture was steam-heated while being stirred and mixed with the coal and molded. A double roll press was used for molding, and a Macek type (90 cc) molded product was molded. As the raw material for the forming coal, coal on a sieve exceeding 6 mm in the classification process (about 5 mass% of the total coal) was used. Under the condition that the raw material is insufficient in the forming coal manufacturing process (in the case of the forming coal ratio of 10 mass% and 20 mass%), the shortage was compensated from coal not treated in the classification process. Under the condition that the raw material becomes surplus (in the case of a coal ratio of 0%), the surplus on the 6 mm sieve is pulverized at 680 rpm (first pulverization step) with a hammerhead type first pulverizer. Then, all of the pulverized material was put into a first blending tank together with 6 mm or less of coal under the sieve, and then pulverized at 570 rpm (second pulverizing step) with a hammerhead type second pulverizer. The produced coal was pulverized in the second pulverization step and the third pulverization step, and the remaining coal was charged into a coke oven to produce coke (in some cases, the coal ratio was 20 mass%, 10 mass%). Examples 1 and 2 of the present invention and the ratio of molding coal ratio of 0 mass% are comparative examples 1). For further comparison, without performing the treatment in the classification process, 0% by mass, 10% by mass, and 20% by mass of the raw coal are produced in the same manner as above, and the remaining coal is charged into the coke oven. Coke was produced (Comparative Examples 2, 3, and 4 in the case of a molding charcoal ratio of 20 mass%, 10 mass%, and 0 mass%). In addition, the comparative example 4 is the conventional grinding | pulverization process (equivalent to only a 3rd grinding | pulverization process) which mixes a non-slightly viscous coal and strong caking coal separately, and is charged in a coke oven. This corresponds to the production of coke by the production method.

  Table 1 shows the results of measuring the drum strength (DI) of the manufactured coke. DI 30/15 was used as the drum strength. DI 30/15 is the drum strength measured under the conditions of 15 rpm and 30 revolutions by the rotational strength test method of JIS K2151.

  Although the drum strength is improved by performing the classification treatment, it has been found that the strength is further improved by molding carbonization using the sieve top after classification as a raw material for molding charcoal. Moreover, it turned out that a strength improvement effect is acquired even if it mix | blends raw material coal other than a sieving raw material with a sieving raw material as a forming coal raw material.

  As in Example 1, coke was produced using the coke production facility shown in FIG. Non-slightly caking coal 80mass% and strong caking coal 20mass% (HGI: about 85, inert amount about 30% by volume) as raw material coal, 30mass% of the total coal amount of non-slightly caking coal The non-slightly caking coal (HGI: about 75, the amount of inert about 36 volume%) which hits was sieved (classification process). Coal of 6 mm or less, which is under the sieve, was put in the first blending tank together with a part of the remaining coal, and then pulverized at 570 rpm (second pulverization step) with a hammerhead type second pulverizer. The remaining non-slightly caking coal and the strongly caking coal are separately pulverized at 600 rpm (third pulverization process) with a hammerhead type third pulverizer, and then sieved and pulverized. The coke was mixed with the non-slightly caking coal that was subjected to the above process and charged into a coke oven to produce coke.

  On the other hand, 0% by mass, 15% by mass, and 20% by mass of total coal were produced by the coal production facility. The production conditions of the coal were the same as in Example 1. As the raw material for forming coal, coal on a sieve exceeding 6 mm in the classification step (about 15 mass% of the total coal) was used. Under the condition that the raw material is insufficient in the forming coal process (when the forming coal ratio is 20 mass%), the shortage was compensated from coal not processed in the classification process. Under the condition that the raw material becomes surplus in the coal forming process (when the coal ratio is 0 mass%), the surplus on the 6 mm sieve is crushed at 680 rpm with a hammerhead type first crusher (first crushing) Step), and after pulverizing everything into a first blending tank together with 6 mm or less coal under sieve, pulverization (second pulverization step) is performed at 570 rpm with a hammerhead type second pulverizer. It was. The produced coal was pulverized in the second pulverization step and the third pulverization step, and the remaining coal was charged into a coke oven to produce coke (in some cases, the coal ratio was 20 mass%, 15 mass%). Examples 3 and 4 of the present invention, and the ratio of molding charcoal of 0 mass% are comparative examples 5). For further comparison, without performing the treatment in the classification process, 0% by mass and 20% by mass of the raw coal are produced in the same manner as above, and the remaining coal is charged into the coke oven and the coke is added. Manufacture was carried out (Comparative Examples 6 and 7 in the case of a molding coal ratio of 20 mass% and 0 mass%).

  Table 2 shows the results of measuring the drum strength (DI) of the produced coke. DI 30/15 was used as the drum strength.

  It has been found that the drum strength is improved by performing the classification treatment, but the strength is further improved by using the sieved material after the classification as a raw material for forming charcoal. Moreover, it became clear that a larger strength improvement effect can be obtained by selecting a coal having a high inert content as the coal to be classified.

  As in Example 1, coke was produced using the coke production facility shown in FIG. Non-slightly caking coal 80 mass% and strong caking coal 20 mass% (HGI: about 85, inert amount about 30% by volume) are used as the raw material coal. The non-slightly caking coal (HGI: about 75, the amount of inerting about 22 volume%) corresponding to was sieved (classification process). Coal of 6 mm or less, which is under the sieve, was put into the first blending tank together with a part of the remaining coal, and then pulverized at 570 rpm (second pulverization step) with a hammerhead type second pulverizer. The remaining non-slightly caking coal and the strongly caking coal are separately pulverized at 600 rpm (third pulverization process) with a hammerhead type third pulverizer, and then sieved and pulverized. The coke was mixed with the non-slightly caking coal that was subjected to the above process and charged into a coke oven to produce coke.

  On the other hand, the coals for 0 mass%, 10 mass%, and 20 mass% of the total coal amount were produced by the coal production facility. The production conditions of the coal were the same as in Example 1. As the raw material for forming coal, coal on a sieve exceeding 6 mm in the classification step (about 10 mass% of the total coal) was used. Under the condition that the raw material is insufficient in the forming coal process (when the forming coal ratio is 20 mass%), the shortage was compensated from coal not processed in the classification process. Under the condition that the raw material becomes surplus in the forming coal process (when the forming coal ratio is 0 mass%), the surplus on the 6 mm sieve is pulverized at 680 rpm with a hammerhead type first crusher (first crushing) Step), and after pulverizing all of the pulverized coal into the first blending tank together with 6 mm or less of coal under the sieve, pulverization is performed at 570 rpm (second pulverization step) with a hammerhead type second pulverizer. It was. The produced coal was pulverized in the second pulverization step and the third pulverization step, and the remaining coal was charged into a coke oven to produce coke (in some cases, the coal ratio was 20 mass%, 10 mass%). Inventive examples 5 and 6 and the case of a coal molding ratio of 0 mass% are comparative examples 8). Furthermore, for comparison, without performing the treatment in the classification process, the cast coal is manufactured in the same manner as above with 0 mass% and 10 mass% of the raw coal, and the remaining coal is charged into the coke oven, Manufacture was performed (Compared Examples 9 and 10 when the ratio of molding charcoal is 10 mass% and 0 mass%).

  Table 3 shows the results of measuring the drum strength (DI) of the manufactured coke. DI 30/15 was used as the drum strength.

  It has been found that the drum strength is improved by performing the classification treatment, but the strength is further improved by using the sieved material after the classification as a raw material for forming charcoal. Moreover, the strength improvement effect became small by selecting coal with low inert content as coal to classify.

The schematic of one Embodiment of the coke manufacturing equipment used by this invention. The graph which shows the relationship between the classification particle size and coke manufacturing cost in a classification process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coal yard 2 Coal yard 3 Sieve 4 1st grinder 5 1st compounding tank 6 2nd compounding tank 7 2nd compounding tank 8 2nd grinder 9 3rd grinder 10 3rd grinder 11 Coal-coal production equipment a Sieve b Sieve

Claims (14)

  A classification step of classifying at least a part of coal as a coke raw material into coal having a large particle size and coal having a smaller particle size than the coal, and a first pulverizing step of pulverizing the coal having a large particle size; A coal forming process for producing coal using the coal pulverized in the first pulverization process, a first compounding process for compounding the coal having a small particle diameter, and a second for pulverizing the blended coal. A coke production method, comprising: charging the coking coal, the coal having a small particle diameter, and the remainder of the coal as the coke raw material into a coke oven after being processed by the crushing step.   A classifying step for classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step for pulverizing the coal having a large particle size, and the first pulverization A coal-forming process for producing coal using the coal treated in the process, a compounding process for compounding the small-particle-size coal and the remainder of the coal as the coke raw material, and pulverizing the compounded coal A coke production method, wherein the coke oven is charged together with the above-mentioned coal after being treated in the second pulverization step.   A classifying step for classifying a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizing step for pulverizing the coal having a large particle size, and the first pulverization A coal forming process for producing coal using the coal treated in the process, a first compounding process for compounding the coal having a small particle diameter, and a second comminuting process for pulverizing the compounded coal. After the processing, the second blending step of blending the remainder of the coal as the coke raw material and the third milling step of grinding the blended coal, and then processing in the molding coal and the second milling step A method for producing coke, characterized in that the coke is charged into a coke oven.   A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a large particle size. And a classification process for classifying the coal having a particle diameter smaller than that of the coal, a first pulverization process for pulverizing the coal having a large particle diameter, and a coal formed using the coal treated in the first pulverization process A first coal blending step for blending the coal with a small particle size and / or the remainder of the coal (X), and a second milling step for grinding the blended coal. A coke production method, wherein after the treatment, the coal (X) containing the coal and the coal (Y) are charged into a coke oven. A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X),
A classification step of classifying at least a part of the coal (X) into a coal having a large particle size and a coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, and the first pulverization A blended coal blending step of blending the coal having a small particle size with the remainder of the coal (X) and the coal (Y), and the blending step. A method for producing coke, characterized in that after being treated in a second pulverization step of pulverizing coal, the coke is charged with coking coal.   A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a large particle size. And a classification process for classifying the coal with a small particle diameter, a first pulverization process for pulverizing the coal with a large particle diameter, and a molded coal that uses the coal processed in the first pulverization process Processing by a first blending step of blending the coal production step, the small particle size coal and / or the remainder of the coal (X), and a second grinding step of grinding the blended coal, After processing by the 2nd compounding process which mixes coal (Y), and the 3rd crushing process which grinds the compounded coal, the coal (X) containing the formed coal, and the coal (Y) A method for producing coke, which is charged in a coke oven.   A method for producing coke using coal (X) having a high hardness and coal (Y) having a hardness lower than that of the coal (X), wherein at least a part of the coal (X) has a large particle size. And a classification process for classifying the coal with a small particle diameter, a first pulverization process for pulverizing the coal with a large particle diameter, and a molded coal that uses the coal processed in the first pulverization process It is processed by a charcoal manufacturing process, a first blending process for blending coal with a small particle size, and a second milling process for grinding the blended coal, and the remainder of the coal (X) and the coal (Y ) Separately, and after processing by the third pulverization step of separately pulverizing the combined coal, the coal (X) and the coal (Y) containing the coal A method for producing coke, which is charged in a coke oven.   A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein at least part of the coal (X ′) Is classified into a coal having a larger particle diameter and a coal having a smaller particle diameter than the coal, a first pulverizing process for pulverizing the coal having a larger particle diameter, and the first pulverizing process. A coal blending process for producing coal using coal, a first blending process for blending the small particle size coal and / or the remainder of the coal (X ′), and pulverizing the blended coal A method for producing coke, characterized in that after the treatment by the second pulverization step, the coal (X ′), the coal (Y ′) containing the coal and the coal (Y ′) are charged into a coke oven. A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′),
A classification step of classifying at least a part of the coal (X ′) into a coal having a large particle size and a coal having a small particle size, a first pulverizing step of pulverizing the coal having a large particle size, A blending step of blending the coal having a small particle size with the remainder of the coal (X ′) and the coal (Y ′), and a coal casting process for producing the coal using the coal treated in the pulverization step; A method for producing coke, wherein the blended coal is treated in a second pulverization step and then charged into a coke oven together with the coal.   A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein at least part of the coal (X ′) Is classified into a coal having a larger particle diameter and a coal having a smaller particle diameter than the coal, a first pulverizing process for pulverizing the coal having a larger particle diameter, and the first pulverizing process. A coal blending process for producing coal using coal, a first blending process for blending the small particle size coal and / or the remainder of the coal (X ′), and pulverizing the blended coal The said coal containing the said forming coal processed by the 2nd grinding | pulverization process, the 2nd mixing | blending process which mix | blends the said coal (Y '), and the 3rd pulverization process which grind | pulverizes this blended coal. Charging (X ′) and the coal (Y ′) into a coke oven. Method of manufacturing coke and butterflies.   A method for producing coke using coal (X ′) having a large amount of inert and coal (Y ′) having a smaller amount of inert than the coal (X ′), wherein at least part of the coal (X ′) Using a coal that has been treated in the first pulverization step, a classification step of classifying the coal into a coal with a large particle size and a coal with a small particle size, a first pulverization step of pulverizing the coal with a large particle size, and The coal (X ′) is processed by a coal forming process for producing coal, a first blending process for blending the coal having a small particle diameter, and a second grinding process for grinding the blended coal. And the coal (X ′) containing the formed coal after being treated by the second blending step of blending the remainder of the coal and the coal (Y ′) separately and the third grinding step of separately grinding the blended coal. ) And the coal (Y ′) are charged into a coke oven. Manufacturing method of Kusu.   The method for producing coke according to any one of claims 1 to 11, wherein classification is performed into coal having a particle diameter set within a range of 1 to 20 mm and having a large particle diameter and coal having a small particle diameter.   A classifier that classifies a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizer that pulverizes the coal having a large particle size, and the first pulverization Coal coal production equipment that produces coal using coal processed by a machine, a blending tank that blends the small particle size coal and the remainder of the coal as the coke raw material, and coal blended in the blending tank A coke production facility, comprising: a second pulverizer for pulverizing the coal, and a conveyor for conveying the coal treated with the second pulverizer and the coal to the coke oven.   A classifier that classifies a part of coal as a coke raw material into coal having a large particle size and coal having a small particle size, a first pulverizer that pulverizes the coal having a large particle size, and the first pulverization A coal forming facility for producing coal using the coal treated by the machine, a first compounding tank for compounding the coal having a small particle size, and a coal composition compounded in the first compounding tank A second pulverizer, a second compounding tank for compounding the remainder of the coal as the coke raw material, a third pulverizer for pulverizing the coal compounded in the second compounding tank, the molded coal and the first A coke production facility, comprising: a transporter for transporting the coal treated by the second pulverizer and the coal treated by the third pulverizer to a coke oven.

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