Method for evaluating coal quality of coking coal having largest Gieseler fluidity of 2000ddpm or less

A technology of Gibson's fluidity and coking coal, which is applied in the direction of material inspection products, fuel oil testing, etc., can solve the problems of large differences in coking coal quality evaluation, inability to accurately match, and inability to scientifically and rationally select cost-effective coking coal, so as to reduce thermal performance The effect of volatility

Active Publication Date: 2015-05-20
武汉钢铁有限公司
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Problems solved by technology

Therefore, in production practice, most of them are based on experience, and the evaluation of coking coal coal quality varies greatly, so that it is impossible to accurately mix and use it, and it is impossible to set a reasonable price in procurement, and it is impossible to scientifically and rationally select cost-effective coking coal to save coal blending and coking costs.

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  • Method for evaluating coal quality of coking coal having largest Gieseler fluidity of 2000ddpm or less
  • Method for evaluating coal quality of coking coal having largest Gieseler fluidity of 2000ddpm or less
  • Method for evaluating coal quality of coking coal having largest Gieseler fluidity of 2000ddpm or less

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Embodiment Construction

[0016] The present invention will be further described in detail through specific embodiments below.

[0017] The coking coal blending ratio of an enterprise is 40%, the dry basis ash content of the coking coal is ≤9.00%, and the sulfur content is ≤0.6%. The specific coal blending plan is:

[0018] Coking coal: 40%; fat coal: 15%; 1 / 3 coking coal: 26%; gas fat coal: 5%; lean coal: 14%.

[0019] Fat coal, 1 / 3 coking coal, gas fat coal and lean coal remain unchanged, and five groups of different coking coals are taken, and coal blending is carried out according to the above proportions, and the coke strength after thermal reaction (CSR) is obtained. The relevant data are shown in Table 1 .

[0020] Table 1 The strength of coke after thermal reaction of different coking coals after coal blending

[0021] coal sample

X 1 / %

X 2 / %

MF / ddpm

b / %

CSR / %

Coking coal 1#

62

0

1278

36

65.24

Coking coal 2#

71

2

88...

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Abstract

The invention discloses a method for evaluating the coal quality of coking coal having a largest Gieseler fluidity of 2000ddpm or less. The method comprises the following steps: 1, detecting to obtain the coarse grain inlay structure proportion X1, the sum X2 of the proportion of fibers and the proportion of the sheet structure, the largest Gieseler fluidity MF and the expansion degree b of the coking coal; 2, setting P as a coking coal quality evaluating index, and commanding P=100+2*[K1*(X1-Xj1)+K2*(X2-Xj2)+K3*(|MF-800|-|MFj-800|)+K4*(|b-50|-(|bj-50|)], wherein the subscript j represents reference coking coal; and K1, K2, K3 and K4 are constants; and 3, calculating to obtain the P value, wherein the coal quality of the coking coal is better if the P value is larger. The method has the advantages of effective evaluation of the quality of the coking coal, reasonable price determination, and scientific application.

Description

technical field [0001] The invention belongs to the technical field of coal blending and coking, and in particular relates to a method for evaluating the quality of coking coal with a maximum Gibbs fluidity less than or equal to 2000ddpm. Background technique [0002] Coking coal is an important support for the quality of coke, and it is also the coal with the best coking performance among coking coals. According to the Chinese coal classification standard (GB 5751-2009), the volatile fraction is >10.0~28.0%, the cohesive index is greater than 65, and the colloidal layer Coking coal with an index less than 25.00mm is uniformly classified as coking coal. However, in practical application, it is found that the classification standard of coking coal has a wide range of definition. Due to the influence of geological origin, coal rock indicators, and process property indicators, the quality of coking coal is complex and changeable. Therefore, it is difficult to accurately dete...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
Inventor 项茹任玉明薛改凤鲍俊芳张雪红宋子逵刘向勇查海鑫陈鹏詹立志
Owner 武汉钢铁有限公司
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