贵州某含硫微细粒浸染型金矿石选矿试验

贵州某含硫微细粒浸染型金矿石中金主要以硫化物包裹金形式存在，载金硫化矿物嵌布粒度细并与脉石矿物共生密切，需细磨才能使硫化物较好地单体解离，而脉石矿物多为易泥化的碳酸盐及黏土类矿物，细磨会产生大量矿泥，降低浮选指标，因此采用两段阶段磨矿-阶段浮选工艺进行选矿试验。结果表明：在一段磨矿细度为 -0.074 mm占80%时，以(NH₄）₂SO₄+CuSO₄为活化剂、丁基黄药+丁铵黑药为捕收剂、2号油为起泡剂，经1粗1精一段浮选，一段浮选尾矿磨细至-0.074 mm占95%，经1粗3精3扫二段浮选，获得的混合精矿金品位为50.79 g/t、回收率为88.31%，可以为该矿石的开发利用提供依据。

Experiments of a Micro-disseminated Gold Ore Contains Sulfur in Guizhou

Gold mainly exists in form of sulfide-wrap minerals in a finely micro-disseminated gold deposit contains sulfur in Guizhou. Gold-bearing sulfide minerals are fine disseminated and closely associated with the gangue minerals. Fine grinding was needed to make the sulfide minerals to be liberated，while the gangue mineral are mainly carbonate or clay minerals，easily to slime. Fine grinding will produce large amount of slime，reduce the flotation index，so the two stage grinding stage flotation process was conducted. The results indicated that，at the grinding fineness of 80% -0.074 mm，using (NH₄)2SO₄ and CuSO₄ as activator，butyl xanthate and butyl ammonium aerofloat as collector，2# oil as frother，via one stage flotation of one roughing-one cleaning，first stage flotation tailing ground to 95% passing 0.074 mm，via two stage flotation of one roughing-three cleaning-three scavenging，bulk concentrate with gold grade of 50.79% and recovery of 88.31% was obtained. The results can provide technique basis for the development and utilization of the ore.