Coking and coal blending method with participation of fat coal

Abstract

The invention discloses a coking and coal blending method with participation of fat coal, which comprises the step of blending various coking coals, wherein the various coking coals comprise fat coal No.1, air fertilizer coal, coking coal and 1 / 3 coking coal; the dry ash-free basis volatile matter (Vdaf) of the fat coal No.1 is less than 28 percent, the Y vale is greater than 25mm, and the maximum Gieseler fluidity (MF) is less than 10000ddpm; the MF of the air fertilizer coal is greater than or equal to 60000ddpm, and the Arnu-Audibert's dilatometer b value is greater than or equal to 220 percent; and the caking index G value of briquette blend is 79-83, the MF is 400-2000ddpm, and the Arnu-Audibert's dilatometer b value is less than 10 percent. According to the coking and coal blending method, the coking coal resources can be utilized reasonably, the coal blending cost is reduced, the CSR of the coke refined through a coke oven with the height of more than 6m is greater than 63 percent under the technological conditions of non-step crushing, coal moisture control, briquette coal process or tamping coking and the like.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, in particular to a coking coal blending method, in particular to a coking coal blending method involving fat coal. Background technique [0002] According to China coal classification standard (GB5751-2009), dry ash-free base volatile V daf A single type of coal with 10.0-37.0%, caking index G value > 85, colloid layer thickness Y value > 25.0mm is classified as fat coal. However, it has been found in practical applications that certain fat coals with low volatile content, high degree of deterioration, and too thick colloids, such as Shanxi Gujiao fat coal (its dry ash-free base volatile V daf 25-26%, Y value > 25mm, G value as high as 90 or more, the maximum Gibbs fluidity MF is only 2000ddpm) and fat coal from a fat coal mine in Mozambique, Africa (its dry ash-free base volatile V daf 25-26%, Y value > 25mm, G value as high as 90 or more, and the maximum Gibbs fluidit...

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Problems solved by technology

However, it has been found in practical applications that certain fat coals with low volatile content, high degree of deterioration, and too thick colloids, such as Shanxi Gujiao fat coal (its dry ash-free base volatile V daf 25-26%, Y value > 25mm, G value as high as 90 or more, the maximum Gibbs fluidity MF is only 2000ddpm) and fat coal from a fat coal mine in Mozambique, Africa (its dry ash-free base volatile V daf 25-26%, Y value > 25mm, G value as high as 90 or more, and the maximum Girdler fluidity MF is only 1600ddpm) There is an essential difference in coal quality from conventional fat coal. If it is simply replaced by conventional fat coal, the coke produced will be loose and not dense

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