加纳某金矿石选矿试验研究

Experimental research on mineral processing of a gold ore in Ghana

针对加纳某金矿石嵌布粒度较细、全泥氰化浸出过程中金浸出率较低等问题,对该金矿石开展浮选试验研究。研究结果表明:在磨矿细度-0.074 mm占85%,矿浆pH值为6.5,矿浆浓度为35%,捕收剂ZJ-01用量为100 g/t,起泡剂2号油用量为60 g/t,活化剂硫酸铜用量为100 g/t的条件下,经过一次粗选、两次扫选、两次精选的闭路浮选流程,获得的精矿产率为3.87%、金品位为86.95 g/t、金回收率为91.15%。试验指标良好,经济效益增加显著,为同类型矿山提供了技术依据。

In response to the fine-grained dissemination and low gold extraction rate during the all-sliming cyanide leaching process of a gold ore in Ghana,an experimental study on the flotation of the ore was conducted,and the results indicated that a closed-circuit flotation process consisting of once roughing,twice scavenging,and twice cleaning steps achieved a gold concentrate yield of 3.87%,a gold grade of 86.95 g/t,and a gold recovery rate of 91.15%when the optimal flotation conditions were a grinding fineness of-0.074 mm accounting for 85%,a slurry pH of 6.5,a slurry concentration of 35%,a collector dosage of 100 g/t ZJ-01,a 2#oil frother dosage of 60 g/t,and an activator dosage of 100 g/t copper sulfate.The indicators were favorable,significantly improving the economic benefits.The study provides important technical support for similar mines.