不同煤配比对胶质层指数的影响研究

为提高焦炭质量,降低生产成本,采用陕北地区常见的气煤、肥煤、东风煤进行单独炼焦,分析3种煤单独炼焦时生成的焦炭质量。在此基础上将3种煤按不同比例配煤炼焦,分析不同配比下焦炭质量的变化,研究最佳配煤方案。结果表明：气煤单独炼焦所得焦炭质量差,但配入气煤可增加产气率和焦饼收缩度;肥煤是优质炼焦煤,但单独炼焦所得焦炭气孔率高,需配煤以改善焦炭质量;东风煤无法单独炼焦,但少量配入可增加焦炭强度,减少优质炼焦煤用量。气煤、肥煤、东风煤质量比为1∶6∶3时,焦炭质量最好,孔隙小,无缝隙和绽边,色泽为银灰色,无海绵体,部分熔合;配煤胶质层最大厚度Y=20.4 mm,最终收缩度X=7.2 mm。

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.