云南某含金铜矿石自然pH下浮选试验研究

云南某含金铜矿石铜品位1.06%、金品位0.38 g/t、硫品位3.56%。为在回收铜的同时可以综合回收金等贵金属,在自然pH条件下进行浮选试验。结果显示:新型环保抑制剂D82在有效抑制黄铁矿的同时,还可以提高金的回收指标;在磨矿细度为-0.074 mm占75.5%条件下,以D82为抑制剂、Z-200为捕收剂,经1粗2精2扫铜浮选,浮铜尾矿以硫酸铜为活化剂、丁基黄药为捕收剂,经1粗1精1扫选硫,闭路试验得到的铜精矿铜品位46.83%、金品位14.22 g/t、铜回收率93.22%、金回收率78.96%,硫精矿硫品位58.69%、回收率75.18%。以D82为抑制剂可以在自然pH条件下实现抑硫浮铜,对伴生贵金属的硫化矿浮选具有借鉴价值。

Experimental Study on Flotation of a Gold-bearing Copper Ore from Yunnan Province at Natural pH

There is 1.06% Cu, 0.38 g/t Au, 3.56% S in a gold-bearing copper ore in Yunnan. In order to recovery gold during copper recovery process, flotation tests under natural pH conditions were conducted. Results show that, the new environmental protection inhibitor D82 can effectively inhibit the recovery of pyrite while improving the recovery of gold. Under the conditions of grinding fineness of -0.074 mm and 75.5%, using D82 as the inhibitor, Z-200 as collector, after one roughing two cleaning two scavenging copper flotation, copper flotation tailings with copper sulfate as the activator, butyl xanthate as collector, after one roughing one cleaning one scavenging sulfur flotation closed circuit flotation, copper concentrate with copper grade 46.83%, gold grade 14.22 g/t, copper recovery rate 93.22%, gold recovery rate 78.96%, sulfur concentrate with sulfur grade 58.69%, recovery rate 75.18% was obtained. The process of copper flotation sulfur depression using D82 as depressor under natural pH conditions has reference values for sulfide ore flotation, which associated with precious metals.