高细泥含量难浮煤泥的反、正两段浮选工艺

Reverse-direct two-stage flotation technology for difficult-to-float coal slime with high content fine slime

针对细煤泥含量高及浮选困难的问题,进行了先反浮选后正浮选的两段浮选试验研究,试验结果表明,以淀粉为抑制剂、十二胺盐酸盐为捕收剂进行反浮选,可以脱除约20%的高灰细泥;对矿浆进行强烈搅拌和使用氢氧化钠调浆,可以消除淀粉对煤的抑制作用和改变十二胺药剂的存在状态;然后进行常规正浮选,可以获得合格质量精煤。反、正两段浮选工艺为高细泥含量难浮煤泥的浮选提供了一条新的途径。

Aiming at problem of difficult to float with high content fine slime, the authors conducted two stage flotation experimental study： firstly reverse flotation and then direct flotation. The results showed： the reverse flotation with starch depressor and lauryl amine hydrochloride collectors can remove about 20 % fine slime with high ash; violent stirring pulp and using natrium hydroxydatum to mix the pulp can eliminate inhibiting effects of starch for coal and change existential state of lauryl amine medicament; and then conducting regular direct flotation can get qualified clean coal. The reverse-direct flotation float coal slimes with high content of fine slime.