Coal blending method for coking chamber coke oven with width of 7.63 meters

Abstract

The invention relates to a coal blending method for a coking chamber coke oven with the width of 7.63 meters, which comprises the following steps: 1. selecting each single-species coking coal for participating in coal blending; 2. blending all the single-species coking coal comprising the following components in percentage by weight: 30-45 percent of coking coal, 5-10 percent of gas-fat coal, 30-45 percent of 1 / 3 coking coal and 8-15 percent of meager lean coal. Compared with the prior art, the invention breaks through a current high-cost coal blending structure mainly using high-quality coking coal with moderate degree of metamorphism, partial gas-fat coal and 1 / 3 coking coal with low degree of metamorphism are used for replacing fat-free coal, the meager lean coal is used for replacing lean coal, the coal blending cost is greatly reduced, and high-quality coking coal resources are saved. By the coal blending method, the acquired coke of the coke oven with the width of 7.63 meters comprises the following components in percentage by weight: 85-90 percent of M40 and 5.0-7.5 percent of M10, and the intensity after reaction is 63-70 percent, thereby satisfying the need of a blast furnace in more than 3,000 m<3>.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a coking coal blending method. Background technique [0002] The 7.63-meter coke oven is an extra-large coke oven with a wide carbonization chamber at home and abroad. Domestic enterprises such as Shandong Yankuang, Maanshan Iron and Steel, Taiyuan Iron and Steel, Wuhan Iron and Steel, and Shougang have successively introduced it in recent years. The height and width of the 7.63m coke oven carbonization chamber are much larger than the 6m coke oven. The height, width and heating system of the coke oven carbonization chamber have a significant impact on the quality of coke produced by different properties of coking coal. In the production practice of a 7.63-meter coke oven in Germany, a high proportion of high-quality coking coal with moderate metamorphism and good cohesion is used, and it has been put into production in China. Enterprises operating 7.63m coke ovens formulate coal...

AI Technical Summary

Problems solved by technology

The height, width and heating system of the coke oven carbonization chamber have a significant impact on the quality of coke produced by different properties of coking coal. In the production practice of a 7.63-meter coke oven in Germany, a high proportion of high-quality coking coal with moderate metamorphism and good cohesion is used, and it has been put into production in China. Enterprises operating 7.63m coke ovens formulate coal blending plans accordingly. In the coal blending structure, the proportion of coking coal with good cohesiveness and fattening coal is 55% to 75%, and most of them are 65% to 75%. The average ratio is above 20%, which is in serious contradiction with the distribution of coking coal resources in China, and it is difficult to maintain the sustainable development of the coking industry

From a technical point of view, the increase in the height of the 7.63m coke oven increases the volume density of the coal charge, and the coking time is much longer than that of the 6m coke oven, which is conducive to the improvement of coke quality. Therefore, the 7.63m coke oven adopts a high proportion of medium metamorphism High-quality coking coal lacks science