改质沥青对冶金炼焦过程配合煤成焦性质的影响

 研究了配入改质沥青的量对4种配合煤的几种主要成焦性能灰分Ad、挥发分Vdaf、硫分St,d、收缩指数X和煤粘结指数G的影响。研究表明，加入改质沥青小于6％时，4种配煤的灰分逐渐下降，之后又逐渐上升；4种配煤挥发分的含量随改质沥青配入量的增加逐渐增大，到5％时达到最大；硫分含量因配合煤不同而有差异，配比4随改质沥青的增加硫含量变化不大，其它3种配合煤在改质沥青的含量小于5％时，硫含量基本不变，之后急剧增大；4种配合煤的胶质层厚度Y随着改质沥青的加入量的增大而增大；收缩指数X随改质沥青含量的增加而下降；配比3的粘结指数随改质沥青的含量的增加基本不变化，其它3种配合煤的粘结指数在改质沥青为5％～6%时达到最大。

Influence of Adding Modified Coal Tar Pitch on the Mixed Coals Cokeability in the Coking Process

The cokeability of adding modified coal tar pitch to four kinds of mixed coals,such as the ash content Ad,the volatiles Vdaf,the sulfur content St,d,the shrinkage index X,and the coal caking index G was studied.The results show that the ash content of the four kinds of mixed coals decrease slowly,and then increase,when modified coal tar pitch content is less than 6%.The volatiles of the four kinds of mixed coals increase with modified coal tar pitch content,and reach to the highest level when modified coal ...