Coking coal blending method with fluidity ≥ 1000ddpm gas coal

Abstract

The invention discloses a coking coal blending method involving gas coal with a maximum fluidity ≥ 1000ddpm, which includes the steps of detecting the process performance indicators of each coking coal and determining the weight percentage of each single coking coal, finally determining the maximum fluidity ≥ 1000ddpm, volatilization The proportion of gas coal with score>37.0% and G>80 is 25-30%. The present invention makes full use of the characteristic that the maximum fluidity of gas coal 1# ≥ 1000ddpm and has a certain fluidity. In coal blending and coking, a specific 1 / 3 coking coal can be selected to replace part or all of the fat coal blending with gas coal of this property. In order to save high-quality fat coal resources; and because of the low isotropic structure and inert structure of coke-forming single coal of this nature, the impact on the quality of coke is small, so coking coal with relatively 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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