采用全氯乙烯作为溶剂，对石台和中梁山煤样分别进行了降灰和降灰脱硫的研究，取得了较好的效果。其中石台０２５～０．０７４ｍ ｍ 粒级精煤灰分最低可达１２４４％ ，产率为７４８５％ ，优于浮选；中梁山煤样全硫从１３６％ 降至０８０％ 。因此该法有可能成为处理煤泥的一种很有前途的方法。同时，文章对分选机理及影响全氯乙烯分选的因素作了讨论 Using perchlorethylene as a solvent, respectively, Shitai and Zhongliangshan coal samples were ash and ash desulfurization research and achieved good results. Among them, the minimum ash content of 025 ~ 0.074m m in Shitai was 1244%, the yield was 7485%, which was better than that of flotation. The total sulfur in Zhongliangshan coal decreased from 1.36% 0  80%. Therefore, this method may become a promising method of treating slime. At the same time, the article discussed the sorting mechanism and the factors influencing perchlorethylene sorting