Coal blending method for producing high-quality coke by high-proportion matched use of lean coal and gas coal

Abstract

The present invention relates to A sort of The coal blending method of producing high-quality coke by using lean coal and gas coal in a large proportion. The specific implementation process is: the following coal types are mixed according to the weight percentage to obtain the blended coal: the maximum reflectance of vitrinite R max >1.4% lean coal 20-21%, No. 45 gas coal 20-21%, fat coal 0%, coking coal 43-48%, 1 / 3 coking coal 12-17%, the sum of the weight percentages of the above coal types is 100%, the sum of the cheapest lean coal and gas coal in the mixed coal is ≥40%, and the most expensive fat coal is zero. On the premise of ensuring the quality of high-quality coke required by the blast furnace, the coal blending structure is optimized, coking coal resources are expanded, the consumption of high-quality coking coal resources is reduced, the cost of coal blending and blast furnace coke is reduced, thereby reducing the cost of iron After the implementation of this achievement, the cost of coking coal blending has been reduced by 12 yuan / ton of coal.

Description

technical field [0001] The invention belongs to the application technical field of coking coal blending and coking, and relates to a coal blending method for producing high-quality coke by blending lean coal and gas coal in a large proportion. Background technique [0002] At present, the iron and steel production capacity in the whole country and even the world is seriously overcapacitated, and the profits of iron and steel enterprises are meager, and even large-scale losses, so that the cost reduction work must be the core focus of coal blending, coking and sintering ore blending processes before iron. However, the requirements for the quality of coke are getting higher and higher for the large-scale blast furnace, stable production, high production, low consumption and cost reduction of blast furnace, and the reduction of coal blending coking cost cannot be at the expense of coke quality. [0003] Although the iron and steel industry and the coking industry have entered a...

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Problems solved by technology

[0006] It can be seen that when the gas-coal ratio is relatively large in the above-mentioned patents, more lean coal cannot be blended; or when the lean coal ratio is larger, more gas-coal cannot be blended

At the same time, the most expensive fat coal or gas fat coal is indispensable in the coal blending structure, so that the cost of coal blending cannot be greatly reduced

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