Influence of coal blending on plastometer indices

To improve coke quality and decrease manufacturing cost,the gas coal,fat coal and Dongfeng coal were adopted to coke individually,which are frequent in the north of Shaanxi Province. The coke quality were analysed. Based on the results,these three kinds of coals were coked in different proportions. Determined the optimum coal blending scheme by analyzing the coke quality. The results show that,the coke quality is poor while only adopts gas coal. But the blending of gas coal increases gas production rate and coke shrinking rate. The fat coal is superior,while coking alone,the porosity of coke is high. Dongfeng coal can't coke alone,while its addition improves coke intensity and decreases superior coal consumption. When the mass ratio of gas coal,fat coal and Dongfeng coal is 1∶ 6∶ 3,the coke quality is the best,the pore is smaller. The coke shows silver,there is no cavernous body. The maximum thickness of plastic layer is 20. 4 mm,the final shrinkage degree is 7. 2 mm.