Coal blending method to control coke quality

Abstract

The invention discloses a coal blending method for controlling coke quality. The method comprises the following steps: (1) providing a preliminary coal blending scheme, testing a coke microstructure of each single coal, and calculating the sum of proportions of coarse grain mosaic structures of each single coal, the sum of proportions of fiber structures and sheet structures of each single coal, and the sum of proportions of isotropic structures of each single coal; (2) testing the fluidity of 1 / 3 coke coals and the fluidity of fat coals and limiting the range of the fluidities; (3) testing the expansion degree of the fat coals and limiting the range of the expansion degree; and (4) providing a control index and performing calculation verification, if the control index is met, performing coal blending according to the coal blending scheme in the step (1), or otherwise, performing adjustment until the provided control index is met. According to the coal blending method, the coal quality characteristic of the single coals are brought into full play by controlling the quality and proportion of each single coal in coal blending, thereby controlling the coking process behavior way and controlling the coke quality. The method is simple and accurate, and the refined coke is relatively good in quality.

Description

Technical field [0001] The invention belongs to the technical field of coal chemical industry, and specifically relates to a coal blending method for controlling the quality of coke. Background technique [0002] my country is a big country in the iron and steel industry. 90% of steel companies use blast furnace iron smelting. Coke is an important raw material for blast furnace smelting. Its quality seriously affects blast furnace production. With the development of large-scale blast furnaces, coke quality requirements are getting higher and higher. On the premise that the coking process does not change, the quality control of coke is mainly carried out through the quality control of coal. The quality of coal from domestic coking companies is mainly guaranteed by controlling its ash, sulfur, volatile content, G value and Y value. However, the inventor's long-term research has found that G value and Y value are apparent indicators, and some coals with close volatile content, G va...

AI Technical Summary

Problems solved by technology

However, the inventors have found through long-term research that the G value and Y value are apparent indicators, and some coal blends with similar volatile matter, G value, and Y value often appear, and the coking performance is quite different.

In addition, even though the blending coal quality control indicators are stipulated, there is a lack of guidance on the adjustment and control of the amount of single coal blending

In short, the existing blending coal quality control technology cannot fully utilize the characteristics of different single coals and the behavior of the coking process, and cannot reasonably match different single coals according to the coal quality characteristics

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