Coking and coal blending method participated by gas coal with fluidity of no less than 1000 ddpm

Abstract

The invention discloses a coking and coal blending method participated by gas coal with fluidity of no less than 1000 ddpm. The method comprises a step of detecting each coking coal processing property index and a step of determining the weight percentage of each coke; it is eventually determined that the blending amount of gas coal with maximum fluidity of no less than 1000 ddpm, volatile compounds of greater than 37.0% and G of greater than 80 is 25 to 30%. According to the invention, the characteristics of maximum fluidity of no less than 1000 ddpm and certain fluidity of the gas coal No. 1 is fully utilized, specific 1 / 3 coking coal is selected in the process of coal blending and coking, and the gas coal can partially or totally replace fat coal, so the resource of high-quality fat coal is saved; since the coking isotropic structure and inertial structure of a single coal of the gas coal with such characteristics are low, influence on coke quality is small, and thus, coking coal with poor quality can be used.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coking coal blending method involving gas coal with a maximum fluidity ≥ 1000ddpm. Background technique [0002] 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. When the volatile content is >28.0~37.0, and the G value is >50~65, it is gas coal 34#; when the volatile content is >37.0%, and the G value is >35, it is gas coal 43#, 44#, and 45# respectively. The coal quality of different grades of gas coal is quite different, and the distribution is also very different. At present, it is generally believed that gas coal has no fluidity, and is generally used as a coking center around which other coking coals coke. Therefore, in order to meet the coke quality require...

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Problems solved by technology

[0003] At present, a new kind of gas coal with a maximum fluidity ≥ 1000ddpm has been newly mined. The volatile content of this gas coal is > 37.0%, and G > 80. Since the maximum fluidity of this gas coal is ≥ 1000ddpm, it has certain fluidity and is used in coal blending. Not as a coking center, it can be used together with other coking coals with a certain degree of fluidity to control the fluidity of the blended coal. The fluidity of the blended coal should not be too high or too low; The gas coal of ≥1000ddpm does not participate in the fluidity control of blending coal, which tends to make the predicted fluidity of blending coal low, but the actual value is high, which ultimately affects the quality control of coke

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