内蒙古某含银混合铜矿石选矿试验研究

内蒙古某含银铜矿石，由于其铜氧化率达20.16%，采用常规浮选工艺回收率较低。针对这种情况，采用优先浮选硫化铜后浮选氧化铜的原则流程，以丁基黄药与Z200质量比为3 GA6FA 1的组合捕收剂为硫化铜的捕收剂，以Na₂S为氧化铜调整剂，采用丁基黄药与羟肟酸钠混合捕收剂为氧化铜捕收剂。在磨矿细度为-0.074 mm占80%的条件下进行闭路试验，硫化铜经1次粗选和2次扫选，氧化铜经1次粗选1次扫选，所获得的硫化铜和氧化铜粗精矿混合产物经过4次精选，最终可获得铜品位为19.18%、银品位为2 308 g/t，铜回收率为80.90%、银回收率为81.03%的铜精矿产品。 

Experimental Research on Processing of a Silver-bearing Copper Ore in Inner Mongolia

Due to the copper oxidation rate of 20.16%, the low recovery is obtained by the conventional flotation processing of a silver-bearing copper ore in Inner Mongolia. In view of this situation, the principle of preferential flotation of copper sulfide minerals followed by flotation of copper oxide minerals is adopted. The combined collector of butyl xanthate and Z200 with a mass ratio of 3 GA6FA 1 is used for copper sulfide mineral collector, Na₂S is used for copper oxide minerals regulator, and the mixture of butyl xanthate and Sodium hydroxamic acid is used for copper oxide minerals collector. By the closed-circuit test consisting of one roughing and two scavenging for copper sulfide minerals, of one roughing and one scavenging for copper oxide minerals and of four cleaning for mixing rough concentrate of copper sulfide and copper oxide minerals. The copper concentrate can be obtained with the copper grade of 19.18%, recovery of 80.90%, silver grade 2 308 g/t and its recovery of 81.03%.