Evaluation method of fat coal quality

A technology of fat coal and coal quality, which is applied in the field of fat coal quality evaluation, can solve the problems of coal quality evaluation and difficulty in comprehensive control, and achieve the effect of reducing the fluctuation range of thermal properties
CN103275740BActive Publication Date: 2015-07-01武汉钢铁有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉钢铁有限公司
Publication Date
2015-07-01

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Abstract

The invention discloses an evaluation method of a fat coal quality. The evaluation method comprises the steps as follows: 1), detecting key indexes of coal quality of the fat coal and obtaining a coarse grain mosaic structure proportion X, a maximum Giseeler fluidity MF and an expansion degree b of the fat coal; 2), setting P to be a fat coal quality evaluation index, P= 100 + 10* [k1* (X-Xj)+ K2* (lgMF-lgMFj) + K3* (b-bj)], wherein Xj, MFj and bj are the coarse grain mosaic structure proportion X, the maximum Giseeler fluidity MF and the expansion degree of standard fat coal respectively, K1, K2 and K3 are constants and related with CSR (coke strength after reaction) as the following relational expression: CSR= K + K1*X + K2* lgMF + K3*b, and K is a constant; and 3), a P value is calculated, and the larger the P value is, the better the fat coal quality is. According to the evaluation method of the fat coal quality, the quality of the fat coal can be effectively evaluated, a price is reasonably determined, and scientific blending is achieved.
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Description

technical field

[0001] The invention belongs to the technical field of coal blending and coking, and in particular relates to an evaluation method of fat coal quality. Background technique

[0002] In recent years, with the rapid development of iron and steel enterprises, the demand for coking coal has increased greatly, especially for moderately metamorphic and strongly caking coal such as fat coal. In the coal blending scheme, fat coal plays the role of adjusting the rheology and expansion of blended coal, promoting closer contact between coal particles of different coking coals, and at the same time providing a certain granular structure to support the thermal properties of coke.

[0003] According to the Chinese coal classification standard (GB 5751-2009), coking coal with volatile content >10.0~37.0%, G value >85, and Y value >25.0 is uniformly classified as fat coal. Due to the wide range of this classification method, there are large differences in the coke ...

Claims

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