Method for producing high-strength metallurgical coke by increasing blending proportion of gas-fat coal

[0022] The present invention will be described in detail below with reference to specific embodiments, but the present invention is not limited to the following embodiments.

[0023] Use 6m coke oven for coking, 20h coking time, dry quenching. There are six types of coking coal used, namely gas coal, 1/3 coking coal, gas fat coal, fat coal, coking coal and lean coal. Gas coal comes from Shandong Zaozhuang Mining Bureau and Xinwen Mining Bureau, 1/3 of coking coal comes from Henan Pingmei Group, gas fat coal comes from Shandong Xinwen Mining Bureau, fat coal Shandong Zaozhuang Mining Bureau, coking coal comes from Shanxi Coking Coal Group, Lean coal comes from Anhui Huaibei Mining Bureau.

[0024] Firstly, the overall quality of the coking coal is analyzed; secondly, according to the weight ratio, select 1/3 coking coal or 24% gas coal, 12%-18% gas fat coal, 0%-12% fat coal, 42% coking coal and lean coal. The coal content is 10%, and 4 coal blending schemes are obtained as shown in Table 1. Ensure that the ash content is 8.8%~9.4%, the sulfur content is 0.71%~0.94%, the dry ash-free base volatile content is 29%~30%, and the adhesion index Above 80, the coal rock index (the average maximum reflectance of the vitrinite group of the coal is R max The distribution range between 0.8% and 1.5%) is 54% to 64%, and the obtained coke thermal strength data CSR fluctuates in the range of 65% to 70%, as shown in Table 1.

[0025] Table 1 Coking coal blending and coke quality data table of the present invention

[0026]

[0027] It can be known from the above table that, under the conditions of the coal blending scheme of the present invention, the purpose of ensuring the strength of metallurgical coke is achieved by increasing the ratio of gas, fertilizer and coal on the basis of ensuring the bonding performance and the requirements of coal rock index.