中文摘要：

云南某难选铜矿石属于低品位高结合率氧化铜矿,采用选冶联合工艺实现该铜矿的高效回收。研究结果表明：磨矿粒度〈0.074 mm的颗粒占80%（质量分数）,调整剂水玻璃用量为600 g/t,组合捕收剂丁黄药＋异戊基黄药用量（质量比1：1）为260 g/t,铜回收指标最佳,经2次粗选、1次扫选、3次精选闭路试验获得的铜精矿中铜品位（质量分数）为12.89%,回收率（质量分数）42.78%。浮选尾矿用硫酸浸出,当磨矿粒度〈0.045 mm的颗粒占80%（质量分数）、硫酸用量为15 kg/t、液固质量比2：1、转速为200 r/min、浸出时间为2 h时,铜浸出率（质量分数）为91.52%,铜的综合回收率达95.15%。

英文摘要：

A refractory low-grade oxide copper ore in Yunnan which contains large amounts of combined copper was studied using united technology of flotation and hydrometallurgy. Flotation experiments results show that a maximum copper recovery and grade of mass fraction of 42.78% and 12.89% are obtained with the grinding fineness of particles mass fraction of 80% particle size less than 0.074 μm, the sodium silicate dosage 600 g/t, the mixed collector of butyl xanthate and isoamyl xanthate（mass ratio 1：1） dosage 260 g/t. The copper in flotation tailings is leaching with sulfuric acid. The copper extraction of 91.52% is obtained with the grinding fineness of particles mass fraction of 80% particle size less than 0.045 μm, the sulfuric acid dosage 15 kg/t, the liquid-solid mass ratio 2：1, the speed 200 r/min, the leaching time 2 h. The total recovery of copper is 95.15% using united technology of beneficiation and metallurgy.