Method for establishing gas coal quality evaluation model

Abstract

The invention discloses a method for establishing a gas coal quality evaluation model. The method comprises the following steps: 1) setting P as a gas coal quality evaluation index, and setting P=Pj+K1*(M-Mj)+K2*(N-Nj), wherein M, N, Mj and Nj respectively refer to the granular mosaic structure proportion of to-be-evaluated gas coal, the proportion sum of isotropic and inert structures of the to-be-evaluated gas coal, the granular mosaic structure proportion of standard gas coal and the proportion sum of isotropic and inert structures of the standard gas coal; K1 and K2 are constants, and are associated with the strength CSR of coke after thermal reaction by the following formula: CSR=K+K1*M+K2*N, wherein K is a constant; 2) obtaining K, K1 and K2 by substituting values of the granular mosaic structure proportions, the proportion sums of the isotropic and inert structures of three different groups of gas coal, and the strength CSR of coke after thermal reaction into the second formula in the previous step; obtaining P by substituting K1 and K2 and indexes of Mj and Nj of the standard gas coal into the first formula, wherein the greater the P value is, the better the gas coal quality is. By adopting the method, the quality of gas coal of different sources can be determined favorably, coking enterprises can use gas coal of different sources reasonably, the coke quality stability is improved favorably, and the thermal fluctuation is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for establishing a gas-coal coal quality evaluation model. Background technique [0002] China is rich in gas and coal resources, gas coal and 1 / 3 coking coal reserves account for more than half of China's coking coal reserves, while strong caking fat coal and coking coal resources are relatively small, in order to make better use of gas coal resources, it is necessary to deepen the quality of gas coal know. According to the national standard GB5751-2009 "Classification of Coking Coal in China", gas coal can be divided into four grades of gas coal 34#, 43#, 44#, and 45#, which are mainly distinguished by volatile matter and G value, volatile matter>28.0~37.0, G value>50~65, it is gas coal 34#, volatile content>37.0%, G value>35, ​​respectively gas coal 43#, 44#, 45#. From the coal classification index, it can be seen that the vola...

AI Technical Summary

Problems solved by technology

From the coal classification index, it can be seen that the volatile content and G value of different brands of gas coal are quite different. In addition, the volatile content and G value can only represent the apparent characteristics of gas coal, and cannot be directly related to the thermal properties of coke, so they cannot better guide the difference. Coal Gas Coal Matching

Images