A coal blending and coking method for regulating the proportion of strongly sticky coal

Abstract

The invention relates to a coal blending coking method for controlling the ratio of strong caking coal, which comprises the following steps: (1) calculating the colloid quality characteristics C of various strong caking coals in the coal blending scheme before adjustment: (2) according to The colloidal mass characteristic C and Gibbs maximum fluidity MF are used to classify strongly caking coals, and the contribution coefficients are determined: (3) According to the vitrinite average random reflectance Rr and Gibbs maxima Mobility MF, select alternative coal; (4) Determine the weight percentage of alternative coal in the adjusted coal blending scheme according to the following formula; (5) Adjust the proportion. Adjusting the coal blending scheme according to the method of the present invention can guarantee the stable range of coke quality, and the adjusted coal blending scheme is compared with the coal blending scheme before adjustment: DI 15 150 The fluctuation is less than or equal to 0.5, M 40 The fluctuation is less than or equal to 0.5, M 10 The fluctuation of is less than or equal to 0.2.

Description

technical field [0001] The invention belongs to the technical field of coal blending and coking, and in particular relates to a coal blending and coking method for regulating and controlling the blending ratio of strongly viscous coal. Background technique [0002] Coal blending coking is a process in which different types of raw coal are blended in an appropriate proportion and then carbonized to obtain coke with certain quality requirements. There are many types of coking coal and mines. The application of coal blending technology can not only ensure the stable quality of coke, but also make rational use of coal resources and save high-quality coking coal. At present, all countries in the world are facing the scarcity of high-quality coking coal resources, and the large-scale blast furnace has higher and higher requirements on the quality and stability of coke, while the strong caking coal in coking coal is less and less, and the ore points are mostly poor in stability. T...

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Problems solved by technology

[0003] This coal blending method ignores an inherent physical characteristic of the coal itself when using strongly caking coal, which is an essential quality characteristic of the colloid formed by coal pyrolysis, which can be interpreted physically as the viscous characteristic of the plastic body. The characteristics are closely related to the coking property and the carbonaceous structure characteristics of the formed coke, but they are often not paid attention to by production, because the cohesiveness indicators commonly used in coking coal include caking index, Gibbs fluidity, Aurora expansion, colloidal layer The index and so on are the comprehensive manifestations of the colloidal volume and quality in the plastic process, which cannot be used to characterize the quality characteristics alone, resulting in fluctuations in the quality of coke obtained when coals of the same type and different ore points with similar metamorphism degrees are used as substitutes for each other. The reason is that This physical property is ignored when formulating the coal blending scheme

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