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A Discrimination Method and Application of Coking Coal Type Classification

A technology of discrimination method and classification method, applied in coke oven, material analysis, material analysis by optical means, etc., can solve the problems of large fluctuation of coke quality, large fluctuation of coking performance, inconsistency, etc., to reduce negative effects and improve coke quality effect

Active Publication Date: 2021-02-26
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the query of the self-produced coke database, it is found that the main coal types such as "Yipinglang and Panjiang" used by Yunmei Energy Company in history all have the above-mentioned "inconsistency" characteristics, and Fukang, which replaces my country's Dawukou coking coal Gas coal, and Aiweier coking coal, which cannot act as coking coal, are similar in that they all have the characteristics of "inconsistency". If the coal is mixed with coal, accurate coal blending results cannot be obtained. The quality of coke obtained after coal blending fluctuates greatly, and the coking performance fluctuates greatly, which has a negative impact on blast furnace production and increases the difficulty of coke quality control in production practice.

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  • A Discrimination Method and Application of Coking Coal Type Classification
  • A Discrimination Method and Application of Coking Coal Type Classification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for discriminating the classification of coking coal types, through the following steps:

[0028] S1. Detection of technical indicators of "Yipinglang" coking coal, including: V daf 25.69%, G value 95, maximum average reflectance It is 1.198, and its reflectance distribution is 60.15% for 0.9-1.2, and 33.30% for 1.2-1.5;

[0029] S2. Put 260kg of coking coal containing 10% moisture into a 200kg test coke oven, and dry distillation for 16.5h under the heating condition of 1010-1050°C to obtain 199kg of coke;

[0030] S3. According to the method specified in the GB / T 2006-2008 standard, test the cold crushing strength M of the 200kg coke oven coke sample 40 was 83.5%.

[0031] S4. According to the method specified in the GB / T 4000-2008 standard, the CSR of the thermal reaction strength of a 200kg coke oven coke sample is 51.16%;

[0032] S5. Judging from the appearance, the coke lumpiness is larger, the melting is better, and the coking performance is simila...

Embodiment 2

[0035] A method for discriminating the classification of coking coal types, through the following steps:

[0036] S1. Detection of technical indicators of "Standard" coking coal, including: V daf22.93%, G value 89, maximum average reflectance It is 1.024, and its reflectance distribution is 55.60% for 0.9-1.2, and 30.01% for 1.2-1.5;

[0037] S2. Put 261kg of coking coal containing 10% moisture into a 200kg test coke oven, and dry distillation for 16.5 hours under the heating condition of 1050-1010°C to obtain 198kg of coke;

[0038] S3. According to the method specified in the GB / T 2006-2008 standard, test the cold crushing strength M of the 200kg coke oven coke sample 40 69.80%;

[0039] S4. According to the method specified in the GB / T 4000-2008 standard, the CSR of the thermal reaction strength of a 200kg coke oven coke sample is 55.73%;

[0040] S5. Judging from the appearance, the coke lumpiness is small, the melting is good and broken, and the coking performance is...

Embodiment 3

[0043] A method for discriminating the classification of coking coal types, through the following steps:

[0044] S1. Detection of technological indicators of Panjiang coking coal, including: V daf 32.29%, G value 86, maximum average reflectance is 0.975, its reflectance distribution is 38.30% for 0.8-0.9, and 43.9% for 0.9-1.2;

[0045] S2. Put 261kg of coking coal containing 10% moisture into a 200kg test coke oven, and dry distillation for 16.5 hours under the heating condition of 1050-1010°C to obtain 197kg of coke;

[0046] S3. According to the method specified in the GB / T 2006-2008 standard, test the cold crushing strength M of the 200kg coke oven coke sample 40 29.28%;

[0047] S4. According to the method specified in the GB / T 4000-2008 standard, the CSR of the thermal reaction strength of a 200kg coke oven coke sample is 73.13%;

[0048] S5. Judging from the appearance, the lumpiness of the coke is strip-shaped, the melting is good, dense and brittle, and the coki...

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Abstract

The invention discloses a coking coal type classification judgment method. The method comprises the following steps: S1, detecting Vdaf, G and average Rmax of coking coal to be detected according to national detection standards, and then respectively judging the types of the coking coal to be detected according to a Chinese standard coal classification technology and a coal rock index classification technology; and S2, calling the coking coal to be detected as amphoteric coal when classification results are inconsistent and if the sum of the proportions of two adjacent coking coals of the coking coal is greater than 80% and the proportion of a single coal is not less than 30%, and naming the amphoteric coal for the second time by taking the judgment result of the Chinese standard coal classification technology as a main language and the judgment result of the coal rock index classification technology as an idiom. The coking performance of the amphoteric coal can be comprehensively mastered, so that technical route guidance is provided for a production department to implement accurate coal blending, the coke quality is improved, the negative influence of large-amplitude fluctuationof the coke quality on blast furnace production is reduced, and the quality improvement and cost reduction of enterprises are realized.

Description

technical field [0001] The invention relates to the technical field of coking coal blending, in particular to a method for discriminating types of coking coal and its application. Background technique [0002] In coke oven smelting, in order to effectively implement the business philosophy of "four points for raw materials, three points for operation", making good use and management of coking coal raw materials has become an important technical measure for enterprises to improve quality and efficiency. The applicant found that its coking performance was not consistent with the coking coal classification standard of this type of coal in the 200Kg coke oven series experiments organized by Standa imported coal. It has been confirmed that its coking performance is between coking coal and gas fat coal, and the characteristics of coking coal are not obvious. Through the query of the self-produced coke database, it is found that the main coal types such as "Yipinglang and Panjiang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00G01N21/55
CPCC10B53/00G01N21/55G01N2021/557
Inventor 高云祥葛居娜李轶胡永杨方夏海英杨立新汪勤峰杨正林周天贵
Owner WUKUN STEEL