JPH06212169A - Control system of coking coal granule size in operation control of coke oven - Google Patents

Abstract

PURPOSE:To conduct the granule size control optimized for each brand of coking coal in conducting the centralized control of operations, ranging from reception of coking coals of various brands to production and shipment of coke, using computers. CONSTITUTION:The widths of crushing slits of crushing blades of a coking coal crushing means are automatically adjusted by measuring the granule size of a sample of each crushing batch of each brand of crushed coking coal with a granule size measuring means, measuring the water content and granule size of each brand of coking coal to be blended after crushing with a water- content and granule-size measuring means, and subjecting the data obtd. by these measurements to computer processing. The variations in granule size between brands and between applications are corrected by preparing a treatment table accompanying the crushing of each brand of coking coal and by adjusting the granule size of each brand to just the same value as attempted by automatically controlling the width of the crushing slits. Thus, the centralized control of granule size of crushed coal using a computer is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coking coal particle size control system for coke oven operation management, and more specifically, for coking furnace operation control system, pulverization of many types of coking coal of each brand accepted from the outside. Therefore, the present invention relates to a coking coal particle size control system for appropriately controlling the crushed particle size of the coking coal according to each brand in order to adapt it to each use of coke such as steel making, casting, and general use.

[0002]

2. Description of the Related Art Generally, in the manufacturing and sales companies of coke products and coke-related products, regarding the production of coke, and by extension, the operation of coke ovens, the production and shipping operations as shown in FIG. The management system of

That is, the head office and each branch 101 of the relevant company
1 and 1011a, sales information 1102 and 1102a corresponding to the demand for coke on the user 1101 side.
And asks the business department (hereinafter, also simply referred to as the business department) 1013 of the coke production factory 1012 to ship the product 104.
Coking coal obtained by Yamada (including imported coking coal) 1111 obtained from the side of the head office 1011 and inputting 1112 of various types of coking coal by brand for each brand to the business department 1013. Acceptance of 1042
Instruct.

As a result, these head offices and branches 101
1 among the three parties, 1, 1011a and the business department 1013
It has a coke production meeting 1031 and coking coal meeting 1032 about once / month, and outlines a monthly (monthly) coke production plan 1033 and a monthly coking coal reception plan 1034 based on the coke production plan 1033. Each of these monthly coke production plans 103
3. The respective outlines of the monthly coking coal acceptance plan 1034 are transmitted and instructed to the production adjustment / management Gr (group) 1014a of the manufacturing department (hereinafter also simply referred to as the manufacturing department) 1014 in the coke production plant 1012.

Further, the production adjustment of the manufacturing department 1014
In the management Gr1014a, based on the monthly coke production plan 1033 and the monthly coking coal reception plan 1034 determined by the conference, the coke oven volume 1041a for each time of the operation of the coke oven is referred to, Detailed daily (daily) coke production plan 1035
In addition to this, in consideration of the number of types of coking coal by brand accepted from the outside and the amount of coal stock 1042a at that time, the grade, coke quality, dry distillation condition 1042b, etc. of each coking coal by brand are taken into consideration. Then, after formulating a detailed daily coking coal blending plan 1036, a daily product shipping instruction 1051 is given to the product manufacturing (daily shift work) Gr1014b ₁ in accordance with the former daily coke production plan 1035. And in accordance with the latter daily coking coal blending plan 1032a, grind and blending of coking coal (Nisshin honkou)
Through 1014c ₁ , crushing and mixing of coking coal by brand (3
Replacement operation) For Gr1014C ₂ , a blending instruction 1052 for each brand of raw coal including a crushing instruction for each brand of raw coal for each day is given.

[0006] Then, it said in the product manufacturing (day shift Broadcasting Operations) Gr1014b ₁ in the manufacturing sector 1014, day-to-day product shipment instruction from the production adjustment and management Gr1014a 10
According to No. 51, the payment plan 10 for the coke amount 1041a
After formulating 61, the operation plan 1071 for the operation operation of the coke oven itself is drafted including the savings and payment plan 1061, and the operation plan 1071 of the coke oven operation is made into a product manufacturing (three shift operations) Gr1014b ₂ . Communicate and direct,
And again, crushing and blending of coking coal for each brand (3 shift operations)
In Gr1014c ₂ , the production adjustment / management Gr
According to the blending instruction 1052 of each brand-specific coking coal including the daily crushing instruction of each brand-specific coking coal from 1014a, an operation plan 1072 for pulverizing / compounding each brand-specific coking coal is prepared, and then, Based on the operation plan 1072 of crushing and blending coking coal for each brand, the operation 1082 for substantially pulverizing the coking coal for each brand and the blending process of the crushed coking coal for each brand is performed, and thereafter, Subsequently, in the product manufacturing (three shift operations) Gr1014b ₂ , the coke oven operation 1081 for dry-distilling the crushed and blended raw material coal to produce coke will be carried out as expected. is there.

On the other hand, in the conventional coke production and shipping management system described above, regarding the many types of coal received from the outside and stored in the coal stockyard, that is, the crushing process of the coking coal by each brand and the mixing process, It is executed as shown in FIG.

That is, each brand-specific coking coal 1202 stored in the coal stock yard 1201 includes a daily crushing instruction of each brand-specific coking coal as instructed in the daily brand-specific coking coal blending plan 1036. Coal blending instructions for each brand 1052
Based on the above, a raw material coal crusher that constitutes a carry-in system, this is an impeller breaker (IB) 1211 in which the crush slit width of the crush blade can be adjusted according to the crush particle size.
According to this, for each designated raw material coal, this is crushed to a predetermined particle size, and after each crushing is appropriately sampled using the automatic sampler 1221, the particle size measuring device 122 is used.
For each brand of raw material coal that has been subjected to particle size control according to 2 and has been crushed to the predetermined particle size, for each crush, it is brought into the compounding tank 1231 that constitutes the compounding system, and the compounding process is performed. The treated raw coal is loaded into each coke oven (both not shown) through a coal bin tank by a levitation system, and dry distillation treatment is performed as expected.

However, in the crushing process and the compounding process for each of the individual raw coals, the particle size analysis table 1222b for each individual brand coal is prepared as a result of the particle size analysis 1222a by the particle size analyzer 1222. In addition, automatic measurement of average water content and particle size of the coking coals of each brand that have been compounded in the levitation system 12
After making 31a, the impeller breaker 1 is judged by an artificial judgment 1241a based on each of these data.
By manually adjusting the crushing slit width of the crushing blade in 211, the crushing particle size of the raw material coal for each brand is maintained at a predetermined value.

More specifically, in the specified coke production plant, for example, about 60 types of coking coals for each type of coking coal are handled and a wide range of coking coals for each brand are handled. The control target of the particle size is due to the difference in the dry distillation coke brand depending on each application such as iron making, casting, general use, etc. In this case, the average crushed particle size of each raw coal is 3 mmφ or more and less than 2 mm. They are divided into types.

[0011]

However, in the conventional crushing particle size control of each brand of coking coal carried out as described above, the particle size analysis result of each pulverized coking coal of each brand and the blending process are carried out. Based on the average moisture and particle size measurement results of the coking coal by each brand, the impeller breaker 1211
Since the width of the crushing blade of the crushing blade is adjusted manually, the following unfavorable problems occur.

In other words, the crushing blade of the impeller breaker 1211 actually wears at the cutting edge each time the crushing process is repeated, and therefore, generally, the crushing blade is generally used after each crushing process operation.
It is necessary to measure and adjust the width of the crushing slit inside the crushing chamber, but in practice it is extremely difficult to frequently measure the wear state of the crushing blade, and hence the width of the crushing slit, on the mechanical side. At the present time, a skilled worker simply visually confirms the crushing particle size result and empirically adjusts the required crushing slit width, and in such crushing particle size management of coking coal by brand, it is set. There was no choice but to increase the variation in the crushed particle size with respect to the crushing target value.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to achieve an optimum coking coal type corresponding to each brand by a control process using a computer. It is an object of the present invention to provide a coking coal particle size control system for controlling the operation of a coke oven of this kind, which is capable of controlling the crushing particle size.

[0014]

In order to achieve the above-mentioned object, the present invention corresponds to an operation management system by a distributed control system of a coke oven utilizing a computer at a coke production site and is classified by brand. In order to unify and manage the crushed particle size corresponding to the type of coking coal, the crushed particle size of the crushed coking coal is analyzed for each crush, and the water content and particle size of the compounded coking coal are measured to analyze these crushed particle sizes. From the data and the measurement data of water content and particle size, the crushing degree of each brand of coking coal is automatically controlled so that the crushing particle size of each brand of coking coal is always maintained at the required set value. .

That is, according to the present invention, in order to pulverize a plurality of different types of raw material coals from the outside, the raw materials for each brand are adapted to suit each application of the product coke for iron making, casting, general use, etc. A coking coal particle size control system for controlling the crushing particle size of charcoal, in which the crushing slit width of the crushing blade in the crushing carry-in system can be adjusted in accordance with the daily crushing and blending instructions for each brand of coking coal. The crushing means crushes each of the specified raw coals into a predetermined particle size for each designated raw coal, and then the pulverized raw coals are brought into a blending tank of a blending system for each pulverization and mixed. ,
And, it has a configuration in which the mixed raw material coal is lifted up to a coal bottle tank and charged into a coke oven by a lifting system,
In the crushing and bringing-in system, by providing a particle size measuring means of the pulverized raw material coal, the pulverized raw material coal by brand is appropriately sampled for each pulverization, and the pulverized particle size is analyzed. By providing a means for measuring water content and particle size of blended raw coal, the moisture content of blended raw coal by brand
While measuring the particle size, the analysis data of the crushed particle size and the measured data of the water content and the particle size are input to the process computer, and in the process computer, the crush slit width of the raw coal crushing means is based on each input data. Is automatically adjusted so that the crushed particle size of each designated raw coal can be maintained at a set value. In the coke oven operation control, the raw coal size control system is provided.

[0016]

Therefore, according to the present invention, the grain-size measuring means is used to appropriately pulverize the raw material coal by brand for each pulverization.
While sampling and analyzing the crushed particle size, the moisture and particle size measuring means measure the water content and particle size of the raw material coal of each brand that is compounded after the crushing treatment, and the data is calculated by a computer to calculate the raw material. Since the crushing slit width of the crushing blade in the charcoal crushing means is automatically adjusted, the degree of wear of the crushing blade can be easily estimated, and the crushing slit width of the crushing blade is set for each brand of raw coal. It is possible to constantly and appropriately maintain the crushed particle size of each of the coking coals, and the variation in the crushed particle size depending on the brand and application of each coking coal is properly corrected. Unified management of results becomes possible.

[0017]

EXAMPLE An example of a coking coal particle size control system for controlling the operation of a coke oven according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is an explanatory view showing an outline of a coke oven operation control system to which a coking coal particle size control system according to an embodiment of the present invention is applied, and FIG. It is explanatory drawing which shows a structure.

In the coking coal particle size control system according to this embodiment, as described above, a distributed control system (hereinafter, simply referred to as DC) of a coke oven utilizing a computer at a coke production site is used.
S or DCS system), which is designed to unify and manage the crushed particle size corresponding to the type of coking coal of each brand, aiming for more efficient operation. In order to do this, the following measures are taken.

That is, according to the crushing / blending instructions of each brand of raw coal for each brand set by the DCS system, the raw coal pulverizing means pulverizes each designated raw coal to a predetermined particle size, and then pulverizes. Each of the crushed raw coals of each brand is brought into the blending tank of the blending system for each crushing process, and the blended raw coals of each brand are transferred to the coal bin by the lifting system and loaded into the coke oven. And, in the pulverizing and bringing-in system, by providing a particle size measuring means of the pulverized raw coal, the pulverized raw coal by brand is appropriately sampled for each pulverization to obtain the pulverized particle size. In addition, the moisture and particle size of the blended raw material coal are measured by providing a means for measuring the moisture content and particle size of the blended raw material coal in the levitation system. The analysis data of the crushed particle size and the measured data of the water content and the particle size are input to the process computer, and further, the process computer automatically adjusts the crushing slit width of the coking coal crushing means based on each input data. Thus, the crushed particle size of each of the designated raw coals is always maintained at the set value.

An outline of the operation management system of the coke oven to which the coking coal particle size management system according to one embodiment of the present invention is applied is as shown in FIG.

In the explanatory view of FIG. 1, in the head office 11 and each branch office 11a of a company that manufactures and sells coke products and coke-related products, coke demand on the side of each user 101, that is, each user 101 needs it. After bringing together the sales information 102, 102a corresponding to the demand for coke for each purpose such as steel making, general use, casting, etc., the production adjustment / management G of the coke production factory 12 under its control G
For r12a, a coke shipping request 21 is made based on each demand, and each type of coking coal (including imported coking coal) obtained from the side of the head office 11 from Yamamoto 111, that is, a raw material for each brand Based on the coal input / output information 112, the production adjustment / management Gr 12a is instructed to receive the coking coal 31.

Further, in the production adjustment / management Gr 12a of the coke production factory 12, the required months, for example, 1
Approximately 3 months for medium- and long-term as one standard unit for each brand 51 of coking coal acceptance, coke production and shipment, and similar raw materials for each brand in each applicable month. Detailed plans 52 for coal reception, coke production, and shipment are established for each, and the existing coke volume management 53 for each day, existing coking coal for each brand, and newly received raw materials It is possible to manage the amount of stored coal 54.

On the other hand, after taking into consideration the grade of coking coal for each brand, the quality of coke for each application, the carbonization conditions 41, etc., a detailed blending design 55 of coking coal for each brand is carried out. And the product management including crushing / blending of coking coal by each brand Gr12b
Under 3, the operation of the coke oven itself for each day, that is,
A product operation plan 56 is created, and at the same time, the coal storage amount management 5
Under No. 4, a crushing / mixing operation plan 57 for crushing / blending of coking coal for each brand according to the blending instruction for each day is established.

Further, in the product manufacturing Gr 12b, an operation 61 for crushing / blending raw material coal for each brand according to the crushing / blending operation plan 57 is carried out, and
A coke oven operation operation 62 for charging the raw material coal pulverized and blended by the operation operation 61 into a coke oven and performing a carbonization treatment to produce coke is carried out.

Here, a concrete example of the entire structure of the coke production plant 12 which applies the management system from the receipt of the coking coal by brand to the production and shipment of coke in the DCS system is shown in the explanatory diagram of FIG. As shown in.

In FIG. 2, No. 7 is a coking coal carrier for domestic coal and imported coal, 72 is a landing and weighing scale for weighing the coking coal for each brand to be unloaded, and 73 is each landed stock for each brand. It is a coal yard that accepts charcoal and stores it for each issue.

Reference numeral 74 denotes a raw coal pulverizer for pulverizing the raw coal of each brand brought in to a predetermined grain size, and 75
Is a blending tank for blending the crushed raw coals of each brand and temporarily storing them, and 76 is the blending tank 75 according to a predetermined blending ratio.
It is a blending machine for blending the crushed raw coal of each brand supplied from the company, and is provided with a water content of the pulverized raw coal, a water content for measuring the particle size, and a particle size measuring device 90.

Reference numeral 77 is a coal bin for receiving the mixed raw material coal which has been carried forward, 78 is a charging vehicle, and 79 is a coke oven group for producing a coke by carbonizing the raw material coal to be charged.

Further, 80 is a coke crusher for crushing the product coke into a predetermined particle size, 81 is a sieving machine for sieving the crushed product coke, and 82 is a storage for storing the sieving product coke. It's a grave, 83, 8
4 is a carrier and a truck for shipping coke.

Subsequently, the coke production facility shown in FIG. 2 and the coke oven operation control system shown in FIG. 1 will be described in more detail.
1a, each operation management information of coke shipping request 21 based on each coke sales information 102, coke shipping request 21 based on 102a, and each brand coking coal acceptance 31 based on each brand coking coal arrival information 112. , A general-purpose computer H (hereinafter, referred to as a computer H), and input / output terminals Ha (hereinafter, terminal Ha) arranged at each associated business office including the production adjustment / management Gr 12a and the product manufacturing Gr 12b. On the CRT, and on the other hand, through the computer H, the crushing and blending of the coking coal and the operation of the coke oven are substantially performed.
After operation, crushing and sizing the product coke,
The information is transmitted to an operation management process computer P (hereinafter, referred to as a computer P) that controls the entire system, and various related information necessary for operation management, such as each brand, is transmitted from the terminal Ha. Similarly, each related information including shipping information for admission of another coking coal can be similarly input to the computer P through the computer H.

Here, in the production adjustment / management Gr 12a, the computer P is transferred via the computer H.
In response to the input of the operation management information created according to each of the above conditions, the acceptance of each coking coal created for each month and each day, the crushing / mixing information, and the production and shipment of coke. Each plan 51, 52 and the amount management 53
Management information of the coal amount management 54 and the blending design 55, respectively, and the record information required in connection with each of these management information, for example,
Each related information such as a saving and payment plan, coking coal / product coke analysis value information, coke shipping / coking coal acceptance record information, distribution information in the production plant 12, quality control information, and the like are also input.

Further, the computer P is provided with processing facilities 72 to 7 for storing, crushing and blending the raw coal.
6, and coke oven cluster equipment 77 to 79 for dry-distilling the blended raw coal, and respective treatment equipment 80 to 82 for crushing, sizing and storing the product coke.
Each process computer for operation control / monitoring of the whole equipment, such as a coking coal side computer DCS1, a product coke side computer DCS2, and a crushed / blended coking coal using the water content and particle size measuring device 90. A process computer P1 for controlling water content and particle size (hereinafter referred to as computer P1), and process computers P2 and P3 for controlling operation of the coke oven cluster 79 (hereinafter referred to as computer P).
2 and 3) and so on.

In the product manufacturing Gr12b, the crushing of the coking coal for each brand according to the crushing and blending operation plan 57,
Carry out operation 61 for blending, and carry out operation 62 of a coke oven for producing coke by dry-distilling the raw material coal of each brand crushed and blended by the operation 61 as expected. To do.

Next, an embodiment of the coking coal particle size control system according to the present invention will be described.

FIG. 3 is an explanatory view showing the outline of the crushing process and the mixing process of the raw material coal for each brand according to one embodiment of the present invention.

That is, in FIG. 3, the coal storage yard 11
Bring in the coking coal by brand 1102 stored in 01 on the basis of the daily crushing / blending instructions for coking coal by brand specified in the daily crushing / mixing information plan 52 for each brand. This is a raw material coal crusher that composes the system. This is an impeller breaker (IB) 1111 that can adjust and control the crush slit width of the crush blade according to the crush particle size.
According to the above, for each designated raw material coal, this is crushed to a predetermined particle size, and after each crushing is appropriately sampled using the automatic sampler 1121, the particle size measuring device 112 is used.
In addition to the measurement of the pulverized particle size according to No. 2, each raw material carbon pulverized to the predetermined particle size is brought into the blending tank 1131 forming the blending system for each pulverization, and the blending treatment is further performed. The coking coal is charged into each coke oven (both not shown) through a coal bin (CB) tank by a levitation system, and dry distillation is performed as expected.

Therefore, in the crushing process and the compounding process for each of these individual raw coals, the analysis data as a result of the particle size analysis 1122a by the particle size measuring instrument 1122 is input to the process computer 1141 and at the same time, Automatic measurement of average water content and particle size of the raw coal blended in the above-mentioned frying system 11
31a, and also in this case, the moisture / particle size data is input to the process computer 1141.

Further, the process computer 1141
Then, by processing these analysis data and water content / particle size data, the impeller breaker 1211 is obtained.
The degree of wear of the crushing blade in is estimated, and the crushing slit width of the crushing blade can be automatically adjusted in accordance with the wear degree to maintain it appropriately at all times, while the crushing amount of each crushed coking coal Table 1141a, carry-in grain size table 1141b, and lifting table 1141c
It is possible to unify and manage the crushed particle size results.

[0040]

As described above in detail in the embodiments,
According to the coking coal particle size control system in the operation management of the coke oven according to the present invention, the particle size measuring means appropriately samples the crushed brand coking coal for each crush, and analyzes the crushed particle size by measuring the water content.・ The particle size measuring means measures the water content and particle size of the coking coal for each brand that is compounded after the crushing process, and the data is calculated by a computer to calculate the grinding slit width of the grinding blade in the coking coal crushing means. Is automatically adjusted, and at the same time, each processing table is created along with the crushing of the brand-specific coking coal.Therefore, depending on the automatic adjustment of the crushing slit width in the former crushing blade, It is possible to match the crushed particle size of the coking coal with the set target value as much as possible, and it is possible to appropriately correct the variation in the crushed particle size depending on the brand and application of each coking coal. Also, depending on the latter processing table, it is possible to centralize management of the crushed particle size results by computer, and eventually, to perform centralized management by the computer control system of operations from receipt of coking coal by brand to production and shipment of coke. It becomes.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a coke oven operation management system to which a coking coal particle size management system according to an embodiment of the present invention is applied.

FIG. 2 is an explanatory diagram showing a specific example of the overall configuration of a production plant according to the same coke oven operation management system as above.

FIG. 3 is an explanatory diagram showing an outline of a crushing process and a mixing process of a raw material coal for each brand in one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an outline of a conventional coke oven operation management system.

FIG. 5 is an explanatory view showing an outline of a crushing process and a compounding process of the raw material coal for each brand in the conventional example.

[Explanation of symbols]

11 Headquarters of companies that manufacture and sell coke products and coke-related products 11a Branches of the same as above 12 Coke production factory 12a Production adjustment and management Gr 12b Product manufacturing Gr 21 Request for shipment of coke 31 Acceptance of coking coal 41 Quality of coking coal, quality of coke・ Pyrolysis conditions 51 Plans for accepting coking coal and producing / shipping coke 52 Detailed plans for accepting coking coal, producing / shipping coke 53 Management of accumulated amount of existing coke 54 Existing coking coal, accepted coking coal Coal stock management 55 Coal coal blending design 56 Product operation plan 57 Coal coal crushing / blending operation plan 61 Coking coal crushing / blending operation operation 62 Coke oven operation 71 Coking coal carrier 72 Landing weigher 73 Coal storage 74 Coking coal crusher 75 Blending tank 76 Mixing machine 77 Coal bin 78 Charging vehicle 79 Coke oven corps 80 Coke crusher 81 Sieving machine 82 Reservoir 83, 84 Carrier for shipping coke, truck 90 Moisture and particle size measuring instrument 101 Each user 102, 102a Sales information 111 Coking coal Yamamoto 112 Coking coal arrival information H Factory general-purpose computer Ha Same as above I / O terminal P Operation management process computer DCS1, 2 Operation control / monitoring computer P1 Moisture / grain size management process computer P2, 3 Operation management process computer 1101 Coal storage 1102 Coking coal 1111 Impeller breaker (IB, coking coal crusher) 1121 Automatic sampler 1122 Particle size analyzer 1122a Particle size analysis 1131 Blending tank 1131a Automatic measurement 1141 Process computer 1141a Grinding amount of each raw coal Rule 1141b Grain size table for each crushed coking coal 1141c Lifted grain size table for each crushed coking coal

Front page continued (72) Inventor Masayoshi Irie 1-1 Kurosaki Shiroishi, Hachiman Nishi-ku, Kitakyushu, Fukuoka Prefecture Mitsubishi Kasei Co., Ltd. Kurosaki Plant (72) Inventor Yoshio Yoshizumi 1 Toho-cho, Yokkaichi-shi, Mie Mitsubishi Kasei Binil Shares In the company

Claims (1)

[Claims] 1. A crushed particle size of a raw coal according to each brand for crushing a plurality of types of raw coal according to each brand, which is received from the outside, in order to suit each application of product coke for iron making, casting, general use, etc. Is a coking coal particle size control system for controlling the coking coal particle size control system that enables adjustment of the crushing slit width of the crushing blade in the crushing carry-in system according to the crushing / mixing instructions of each brand of coking coal for each day. For each designated raw coal, each raw coal is pulverized to a specified particle size, and then each pulverized raw coal is brought into the blending tank of the blending system for each pulverization, and the blending treatment is performed. The raw coal obtained by the levitation system is moved to a coal bin tank and charged into a coke oven.In the crushing and bringing-in system, a pulverized raw coal is provided with a particle size measuring means of the pulverized raw coal. Properly sampling for each crushing and analyzing the crushed particle size, and in the above-mentioned frying system, the means for measuring the water content / particle size of the blended raw material coal is provided, and the water content / particle size of the blended raw material coal of each brand is treated. In addition to measuring the crushed particle size, the crushed particle size analysis data and the moisture / particle size measured data are input to the process computer, and the process computer determines the crushing slit width of the coking coal crushing means based on each input data. A coking coal particle size management system for coke oven operation management, wherein the crushed particle size of each specified coking coal is automatically adjusted so as to be maintained at a set value.