Coking coal subdividing method based on cokeability and application of method in coal blending

Abstract

The invention discloses a coking coal subdividing method based on cokeability and the application of the method in coal blending. The method comprises the following steps that 1, the index affecting the cokeability of coking coal is determined; 2, the average maximum reflectivity of single coking coal and a coking coal optical organization structure are measured, and according to difference of the average maximum reflectivities, a solid-soft temperature interval is measured, or a Golgi maximum flow degree is measured or other indexes are not measured any more; 3, the coking coal is subdivided into gas coal 1#, gas coal 2#, gas-fat coal, 1 / 3 coke coal 1#, 1 / 3 coke coal 2#, 1 / 3 coke coal 3#, fat coal 1#, fat coal 2#, coke coal 1#, coke coal 2#, coke coal 3#, coke coal 4#, lean coal 1# and lean coal 2# according to a measurement result obtained in the step 2. By subdividing the coking coal, the requirements of current resource globalization and use refinement can be met, and coal resources can be allocated effectively.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a method for subdividing coking coal based on coking property and its application in coal blending. 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. Sex is not strong. 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 thickness Y value and Oya swelling degree b are quantitative indexes, and Gejin index and coke residue cha...

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

Images