Coking coal quality classification method and coal blending and coking method with participation of coking coal
A technology of coking coal and coking coal, which is applied in the field of coal quality classification of coking coal, can solve the problems of not being able to play a good role, coking coal can not be achieved, etc., and achieve the effect of stable improvement of coke quality and optimal matching
Active Publication Date: 2013-12-18
武汉钢铁有限公司
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However, because the quality of coking coal is not only affected by geological age, but also by its geographical environment, coal-forming conditions and other factors, the quality of coking coal classified as fat coal according to the national standard is quite different. In practical applications, it is found that some are classified as The coking coal of fat coal cannot or cannot play the role of this type of coal well
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[0029] The present invention will be described in further detail below in combination with specific embodiments.
[0030] The coal quality classification method of the coking coal of the present invention is: for dry ash-free base volatile matter > 10.0-37.0%, coking index G value > 85, colloidal layer maximum thickness Y value > 25.0mm:
[0031] The first step: Determination of its dry ash-free base volatile V daf , Determination of its Kiel's fluidity to determine the maximum fluidity MF, the determination of the Aurora swelling degree b:
[0032] The second step is to classify according to the results of the first step:
[0033] Dry Ash Free Base Volatile V daf >10.0-28%, the maximum fluidity MF<10000ddpm and the expansion degree b<150%, classified as coking coal;
[0034] Dry Ash Free Base Volatile V daf >10.0-28%, the maximum fluidity MF ≥ 10000ddpm or the expansion degree b ≥ 150%, classified as fat coal;
[0035] Dry Ash Free Base Volatile V daf >28-32%, the ma...
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Abstract
The invention discloses a coking coal quality classification method and a coal blending and coking method with participation of coking coal. The dry ash-free volatile of the coking coal is higher than 10.0-37.0%, the caking index G value is larger than 85, and the maximum thickness Y value of a plastic layer is larger than 25.0mm. Indexes of dry ash-free volatile, maximum fluidity and rubber expansion are obtained by detecting dry ash-free volatile, gieseler fluidity and rubber expansion of coking coal, and the coking coal is classified into primary coking coal, fat coal, 1 / 3 coking coal and air fat coal according to different ranges of the indexes so as to determine the coal blending and coking method with participation of the coking coal. Coking coal is classified according to the method and then used for coal blending and coking, coke quality is stably improved without adoption of coal humidifying, coal briquette technique and pre-crushing process, and CSR (coke strength after reaction) of cokes coked in coke ovens higher than 6m is larger than 63%.
Description
technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coal quality classification method of coking coal and a coking coal blending method in which the coking coal participates. Background technique [0002] Fatty coal can adjust the rheology and expansion of blended coal in coal blending and coking. It can be blended with a certain amount of weak viscosity coking coal, and at the same time provide a certain granular structure to support the thermal properties of coke. According to China coal classification standard (GB 5751-2009), dry ash-free basis volatile V daf Coking coal with >10.0-37.0%, cohesive index G value > 85, and colloidal layer maximum thickness Y value > 25.0mm is classified as fat coal. However, because the quality of coking coal is not only affected by geological age, but also by its geographical environment, coal-forming conditions and other factors, the quality of coking coal c...
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IPC IPC(8): C10B57/04
Inventor 项茹宋子逵薛改凤鲍俊芳崔会明陈鹏詹立志张雪红任玉明查海鑫
Owner 武汉钢铁有限公司