Method for producing high-quality metallurgical coke by using coal and rock indexes

Abstract

The invention discloses a method for producing high-quality metallurgical coke by using coal and rock indexes, and belongs to the technical field of blended coal for coking. According to the method, the target of producing high-strength metallurgical coke is achieved by controlling the distribution ranges of volatile index Vdaf, the caking index G, the maximal gelatinous layer thickness Y and the vitrinite mean maximum reflectance Rmax (0.9%-1.5%). According to the method, the feeding ratios of fat coal and coking coal can be reduced to about 50%; the heat intensity CSR of the coke is over 65%; and the requirements of over 2500m<3> blast furnace ironmaking are met.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coking coal blending method for producing high-quality metallurgical coke with coal rock indicators. The invention solves the problem that coal blending and coking under the guidance of coal petrology theory is difficult to operate in production, and the advantages of coal blending and coking under the guidance of coal petrology cannot be brought into play. Background technique [0002] Although my country's coal resources are relatively rich, coking coal only accounts for all coal resources. However, the proportion of coking coal and fat coal that needs to be mixed in the production of metallurgical coke usually exceeds 50%. With the large-scale blast furnaces, large-volume blast furnaces have higher requirements on the quality of metallurgical coke. Since many coking coal blending companies still use experience to blend 29% of the coal, and the indisp...

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Problems solved by technology

[0005] For the production of high-quality metallurgical coke under the top-loading coal coking process, the proportion of fat coal and coking coal needs to be increased. In actual production, sometimes fat coal and coking coal are mixed, and different batches of incoming coal have different degrees of mixing. If only By controlling the proportion of fat coal and coking coal, it is difficult to ensure the quality of metallurgical coke, and sometimes the proportion of fat coal and coking coal is too high, which increases the cost of coal blending

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