以石灰为调整剂浮选贵州某卡林型金矿石

贵州某卡林型低品位难处理金矿石中的金呈微细粒浸染状嵌布,主要赋存在黄铁矿等硫化矿物中,或以单体金形式存在,这些易回收金占总金的81.34%;碳酸盐及硅酸盐中的金占总金的18.66%。为了高效开发利用该金矿石,以石灰为浮选矿浆调整剂,进行了浮选选金试验。结果表明,在磨矿细度为-0.074 mm占96%的情况下,采用1粗3精3扫、精选中矿集中1粗1精2扫单独再选、其余中矿顺序返回流程处理,最终获得了金品位为9.41g/t、金回收率为86.45%的金精矿。

Flotation of Carlin Type Gold Ore from Guizhou with Lime as Regulator

The gold in a low grade and refractory gold ore of Guizhou is fine disseminated and mainly occurs in sulfide minerals like pyrite，or occurs as monomer gold.The monomer gold account for 81.34% of total gold，and gold in carbonate and silicate occupies 18.66% of total gold.In order to efficiently develop and utilize this gold ore，experiment of gold flotation was conducted with lime as pulp regulator.The results showed that at the grinding fineness of 96% -0.074 mm，gold concentrate with gold grade of 9.41 g/t and recovery of 86.45% was obtained by adopting the process of one roughing-three cleaning-three scavenging，middles from cleaning collected and processed by one roughing-one cleaning-two scavenging process，and other middles back to the flow-sheet in turn.