Coking coal blending method for charred coal

Abstract

The invention discloses a coking coal blending method for charred coal. The method comprises a step of blending the following single coking coals in percentage by weight: 3 to 8 percent of gas-fat coal, 5 to 15 percent of fat coal, 20 to 30 percent of 1 / 3 charred coal, 10 to 20 percent of Outer Mongolian charred coal, 12 to 20 percent of Shanxi charred coal, 0 to 8 percent of charred coal in other districts, and 10 to 15 percent of lean coal. By the method, the conventional international standard classification and blending method is broken; and the Outer Mongolian charred coal and the Shanxi charred coal participate in coking coal blending, so that the resources can be effectively utilized in the absence of graded crushing, coal briquette or tamping and coking technology, and the quality of the charred coal is not degraded. By the method, the Audibert-Arnu dilatation index is applied to a charred coal utilization technology and a blended coal utilization technology, so that the characteristics of the coking coals are deeply mined, and the resources are optimized reasonably.

Description

technical field [0001] The invention belongs to a coking coal blending method, in particular to a coking coal blending method for coking coal. Background technique [0002] In recent years, the output of the coking industry has increased rapidly and the quality of coke has been steadily improved, which basically meets the needs of blast furnace smelting. At the same time, it also causes a tight supply of coking coal, especially the contradiction of tight supply of high-quality coking coal. All coking enterprises have to seek new resources from the western border areas, Outer Mongolia, Australia, Canada, etc. at home and abroad. Due to the different coal-forming conditions of coking coal in various regions, although the apparent indicators are high, such as G value and Y value, there are certain differences in rheology, expansion and coking microstructure. [0003] Outer Mongolia coking coal, the volatile content is between 24% and 26%, the cohesive index G value is greater ...

AI Technical Summary

Problems solved by technology

[0003] Outer Mongolia coking coal, the volatile content is between 24% and 26%, the cohesive index G value is greater than 85, the maximum thickness Y value of the colloidal layer is greater than 17mm, the Oya swelling degree b value is 55-75, and the maximum Girdler fluidity MF is 100-300ddpm. However, the coarse-grained mosaic structure of a single coal coke is only 35-40%, and the maximum vitrinite reflectance This outer Mongolia coking coal should be high-quality coking coal according to the national standard, but the coking coarse grain structure of outer Mongolia coking coal is lower than that of domestic high-quality coking coal, and the coke quality fluctuates greatly

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