某金矿石中金的浮选及氰化浸出试验

Experimental Study on Gold Flotation and Cyanide Leaching for a Certain Gold Ore

辽宁某金矿石因载金硫化矿物浸染粒度细并与脉石矿物共生密切以及矿石中易泥化矿物含量高而较为难选。对该矿石进行浮选试验,结果表明,在-200目占95.3%的磨矿细度下,以碳酸钠为调整剂、丁基黄药＋丁铵黑药为捕收剂、2号油为起泡剂,获得的浮选精矿金品位为77.1 g/t,金回收率79.58%。进一步对浮选尾矿进行氰化浸出,可获得82.20%的作业金浸出率,从而使金的总回收率达到96.37%。对原矿直接氰化浸金进行探索,结果表明,金的浸出率仅为80.41%。

Abstract Since gold-bearing sulfide minerals exist in fine disseminated particle of a Liaoning Gold Ore and in close symbiosis with the gangue minerals,and contain high levels of easily clay ores,it is rather difficult to separate.The flotation tests were carried out.The results showed that under the grinding fineness of-200 mesh 95.3%,and taking sodium carbonate as regulator,sodium butyl xauthate＋ ammonium-butyl aerofloat as collector,and 2# oil as foaming agent,gold concentrate with grade and recovery of 77.1 g/t and 79.58% respectively was obtained in flotation tests.Further cyanide leaching tests for flotation tailings were done.82.20% of the operating gold leaching rate achieved,resulting in the total gold recovery rate up to 96.37%.Researches results on the direct cyanide gold leaching method showed that the gold leaching rate was only 80.41%.