Coking coal quality classification method and coking coal blending method involving same

Abstract

The invention discloses a coking coal quality classification method. The method includes steps: 1) determining indexes having influences on coking coal cokeability, to be more specific, taking dry ash-free basis volatiles, determined Audibert-Arnu dilation degree b, vitrinite average maximum reflectivity, Kirschner's maximum mobility and coke optical texture structure as the indexes for determining coking coal cokeability, so that appearance limitation of existing classification indexes can be overcome, reasonability and accuracy in coking coal are achieved, application optimization is realized to give full play to functions of coking coal. In addition, by application of the Audibert-Arnu dilation degree index to the coking coal utilization technique and the compound coal utilization technique, coking coal quality characteristics are deeply mined, and optimal and reasonable resource application is realized.

Description

technical field [0001] The invention relates to the technical field of coking coal blending, in particular to a coal quality classification method for coking coal and a participating coking coal blending method. 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 weakly viscous coking coal, and at the same time provide a certain granular structure to support the thermal properties of coke. According to the Chinese coal classification standard (GB 5751-2009 ), dry ash-free base volatile matter Vdaf > 10.0-37.0%, cohesive index G value > 85, colloidal layer maximum thickness Y value > 25.0mm is classified as fat coal, but because the quality of coking coal is not only affected by geological Influenced by age, geographical environment, coal-forming conditions and other factors, the quality of coking coal classified as fat coal according to the national sta...

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Problems solved by technology

[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 weakly viscous coking coal, and at the same time provide a certain granular structure to support the thermal properties of coke. According to the Chinese coal classification standard (GB 5751-2009 ), dry ash-free base volatile matter Vdaf > 10.0-37.0%, cohesive index G value > 85, colloidal layer maximum thickness Y value > 25.0mm is classified as fat coal, but because the quality of coking coal is not only affected by geological Influenced by age, 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 coking coal classified as fat coal cannot achieve or It cannot play the role of this type of coal well;

[0003] In the prior art: the patent application publication number N 102690669A discloses a coal quality classification method for coking coal and a coking coal blending method involved in it. The dry ash-free base volatile content of the coking coal is >10.0-37.0%, viscous The knot index G value>85, the maximum thickness Y value of the colloidal layer>25.0mm, which has apparent limitations, and the classification of coking coal is not accurate enough to meet the needs of use