Coal blending method for controlling degree of shrinkage of coal as fired in large coke oven with wide coking chamber

Abstract

The invention discloses a coal blending method for controlling degree of shrinkage of coal as fired in a large coke oven with a wide coking chamber, comprising the following steps: making statistics on the degree of shrinkage of the blended coal in the existing coke ovens with 6m-high coking chambers and computing the average value of the degree of shrinkage of the blended coal in the 6m coke ovens according to the statistic of the degree of shrinkage of the blended coal in the 6m coke ovens; computing the range of the degree of shrinkage of the blended coal in the large coke oven with the wide coking chamber; and correspondingly increasing the blending proportion of the coking coal with high degree of shrinkage for blending coal according to the computed range of the degree of shrinkage of the blended coal in the large coke oven with the wide coking chamber, measuring the degree of shrinkage of the obtained blended coal, if the degree of shrinkage is within the control range, determining the coal blending scheme to blend coal for coking, if the degree of shrinkage is not in the control range, correspondingly increasing or decreasing the blending proportion of the coking coal withhigh degree of shrinkage, blending coal and detecting the degree of shrinkage until the measured value of the degree of shrinkage of the blended coal in the obtained coal blending scheme is within the control range, thus obtaining the coal blending scheme for the large coke oven with the wide coking chamber. The method can ensure the blended coal to have reasonable degree of shrinkage in the large wide coking chamber and the coking process, thus improving the quality of the coke.

Description

technical field [0001] The invention relates to the technical field of coking coal blending, in particular to a coal blending method for reasonably controlling the shrinkage of furnace coal in a coke oven with a large wide carbonization chamber. Background technique [0002] As we all know, coking coal is an indispensable resource in metallurgical coke production industry and other fields. At present, the existing furnace coking coal is blended according to the coke quality requirements and the existing coal mine resources. [0003] Large-scale coke oven is the general trend of coking technology development in the world since the 1970s. In the process of large-scale coke oven, on the one hand, the height of the carbonization chamber is continuously increasing, and on the other hand, the width of the carbonization chamber is gradually widening. The increase in the height of the carbonization chamber increases the bulk density of the existing coal into the furnace and improv...

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Problems solved by technology

The increase in the height of the carbonization chamber increases the bulk density of the existing coal into the furnace and improves the quality of coke. However, a large number of experiments show that: the increase in the width of the carbonization chamber leads to an increase in the shrinkage of the existing coal into the furnace during the coking process, resulting in a wide carbonization chamber. Metallurgical coke rate reduction

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