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Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm

A technology of 2000ddpm, Kiel's fluidity, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the influence of thermal properties that cannot accurately characterize the quality of mixed coal coke, and the inability to distinguish the quality of mixed coal types, etc. problem, to achieve the effect of reducing the fluctuation range of thermal performance

Active Publication Date: 2013-09-04
武汉钢铁有限公司
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Problems solved by technology

In the face of complex blended coal quality, the current coking coal evaluation technology can roughly distinguish the proportion of blended coal types, but the quality of each blended coal type cannot be distinguished, so that it is impossible to accurately characterize the quality of blended coal coke. influence, especially on thermal performance

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  • Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm
  • Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm
  • Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm

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Embodiment Construction

[0017] The present invention will be further described in detail through specific embodiments below.

[0018] 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%. MF: 800ddpm, b: 50%): 20%; coking coal B (MF>2000ddpm): 20%; fat coal: 15%; 1 / 3 coking coal: 26%; gas fat coal 5%; lean coal: 14%.

[0019] Coking coal A, fat coal, 1 / 3 coking coal, gas fat coal and lean coal remain unchanged, and six groups of different coking coal B are used to carry out coal blending and coking according to the above ratio, and the coke strength after thermal reaction (CSR) is obtained. See Table 1 for the data.

[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#

65

0

2080

80

67.87

Coking coal 2#

61

3

2980

...

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Abstract

The invention discloses an evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm. The evaluation method comprises the following steps of: 1) detecting to obtain a coarse grain mosaic structure proportion X1 of the coking coal, the sum of the proportions X2 of fibers and a sheet structure, a maximum Giseeler fluidity MF and a swelling capacity b; 2) setting P as an evaluation index of the coal quality of the coking coal, and enabling P=100+2*[K1*(X1-Xj1)+K2*(X2-Xj2)+K3*(|L*MF-800|-|L*MFj-800|)+K4*(|b-50|-|bj-50|)], wherein the subscript j represents standard coking coal, K1, K2, K3 and K4 are constant numbers; and 3) calculating the P value, wherein the greater the P value is, the better the coal quality of the coking coal is. The evaluation method of the coal quality of the coking coal with the maximum Giseeler fluidity greater than 2000 ddpm can evaluate the quality of the coking coal efficiently, determine the price reasonably and can be used in matching scientifically.

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 MF>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 determine the qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 项茹薛改凤任玉明宋子逵查海鑫鲍俊芳刘向勇张雪红陈鹏詹立志
Owner 武汉钢铁有限公司
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