Coal quality classification and coal blending method based on coking property of coking coal

Abstract

The invention discloses a coal quality sorting method based on cokeability of coking coal. The sorting method comprises the following steps: 1) determining the indexes which affect the cokeability of coking coal: determining the average maximum reflectivity of vitrinite, the Gieseler maximum fluidity, solid-soft temperature interval and optical organizational structure of coke as the indexes of cokeability of coking coal; 2) determining the indexes which affect the cokeability of coking coal; and 3) correspondingly dividing various single coal into determining the indexes which affect the cokeability of coking coal: gas-fat coal, gas coal, fat coal, 1 / 3 coking coal, coking coal, lean coal, inferior mixed coal or special cause coal according to different measuring results in the step 2). The invention further discloses a coal distributing method based on the cokeability of coking coal. By taking the average maximum reflectivity of vitrinite, the Gieseler maximum fluidity, solid-soft temperature interval and optical organizational structure of coke as the sorting indexes, not only are the indexes simple to set, but also the inferior mixed coal or special cause coal can be differentiated, and part of highly degenerative coke is prevented from being misjudged as lean coal, so that resources are scientifically and reasonably configured.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a coal quality classification and a coal blending method based on the coking property of coking coal. Background technique [0002] Coking property is a specific technical requirement for coal in the field of coking. The concept of coking in traditional coal chemistry is defined as the ability of coal to form coke with a certain degree of lumpiness and strength under the coking conditions of an industrial coke oven or a simulated industrial coke oven. This definition is relatively abstract and does not provide strong guidance for the practice of coking coal blending. The international coal classification standard shows that Aoya swelling degree, Gejin index and coke slag characteristics are internationally recognized coal coking indicators; The degree b is the main index of coking property, among which the cohesive index G value, colloidal layer thickn...

AI Technical Summary

Problems solved by technology

According to the classification method of this invention, it should be classified as 1 / 3 coking coal, but if the coal obtained by mixing fat coal and lean coal is used in large quantities as 1 / 3 coking coal, the lean coal contained in it will inevitably cause a high proportion of metamorphic coal in the blended coal If it is too high, it will affect the wear resistance of coke, or if the proportion of fat coal is too high, it will cause high porosity of coke

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