Coking and coal blending method with participation of gas coal

Abstract

The invention discloses a coking and coal blending method with participation of gas coal, which comprises the step of blending the gas coal with the caking index G value of 50-70; coking coal No.1 with the coking coarse grain mosaic texture proportion of more than 60 percent; coking coal No.2 with the coking coarse grain mosaic texture proportion of below 60 percent; fat coal with the maximum Gieseler fluidity (MF) of more than 60000ddpm, the Arnu-Audibert's dilatometer b value of more than 150 percent, and the coking coarse grain mosaic texture proportion of more than 40 percent; and blending 1 / 3 coking coal and lean coal; and controlling briquette blend to be with the coking coarse grain mosaic texture proportion of more than 35 percent, the caking index G value of 79-82, and the thickness of colloidal matter layer of 17-19mm. Due to the prepared briquette blend, not only is the compounding amount of the gas coal increased to 5-15wt percent, but also the compounding amount of the coking coal and the fat coal is reduced, the coking coal resources can be utilized reasonably, the coal blending cost is reduced, the CSR of the coke refined through a coke oven with the height of more than 6m is greater than 63 percent under the technological conditions of non-step crushing, briquette coal process or tamping coking and the like.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, in particular to a method for coking coal blending, in particular to a coking coal blending method involving gas coal. Background technique [0002] my country is rich in coal resources, but coking coal resources are in short supply, and the proportion of various coal types in the limited coking coal resources is unevenly distributed. Among the proven coal reserves, coking coal reserves only account for 26% of the total coal reserves, and most of them are gas coal and 1 / 3 coking coal, accounting for more than 46% of the total coking coal, of which gas coal accounts for 25%. Above, 1 / 3 coking coal accounts for more than 21%. In addition, coking coal accounts for 17.57% of the coking coal reserves, and fat coal accounts for 10%, the sum of which only accounts for less than 1 / 3 of the total coking coal. At present, many domestic coking enterprises allocate a large amount of high-quali...

AI Technical Summary

Problems solved by technology

The coke obtained by coking alone has large lumps and few cracks, but poor wear resistance

At present, under the condition of not adopting briquette ramming coking and other coking processes, the coking plants of large domestic iron and steel enterprises are generally unwilling to use gas coal, or the amount of gas coal is very low, only 2-3%

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