Coal blending method for improving coke quality in coke oven carbonization chamber with width below 500mm

Abstract

The invention discloses a coal blending method for improving coke quality in an coke oven carbonization chamber with the width below 500mm, and the coal blending method comprises the following steps: 1) identifying the mass percentage of each single coal in blended coal; 2) controlling the ash content in the blended coal to be Ad<10%, the sulfur content to be St,ad < 0.9%, and G value to be 75-78; 3) directly blending coking coal with the fineness of not less than 60% for coking without passing through of a pulverizer; mixing each coking coal with the fineness of less than 60% in the mass percentage determined in the step 1), then passing through the pulverizer, controlling the fineness to be 75% +/-3%; mixing the coking coal passing through the pulverizer and the coking coal which does not pass through the pulverizer, mixing by a belt process, then entering into a coal tower for standby coking. The method, under the premise of ensuring of the coke quality, combines the actual width of the coke oven carbonization chamber to realize the optimal mixing use of different kinds of coal and different coal resources, and greatly reduces the cost of coal blending.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coal blending method for improving the coke quality of a coke oven in a carbonization chamber with a width of less than 500 mm. Background technique [0002] my country's iron and steel industry continues to develop, and the large-scale blast furnace has promoted the vigorous development of large-volume coke ovens. However, the distribution of coke ovens in my country is still dominated by coke ovens with narrow carbonization chambers below 500mm. The width of the carbonization chamber is different, so that the distance from the heating side to the center of the coke cake is different, and the uniformity of colloid formation and decomposition is different, which ultimately affects the quality of coke. The width of the carbonization chamber is narrowed, the width uniformity of the coke cake is improved, and the fluidity and expansion required for blendi...

AI Technical Summary

Problems solved by technology

Song Zikui et al. developed a classification and evaluation method for 1/3 coking coal, coking coal and other coal types (such as the coking coal blending method application number 201010599230.6 involving 1/3 coking coal), and proposed differe

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