Research on process of separating copper-sulphur with low alkalinity from some copper sulfide ore in Yunnan province

The recovery of Cu and Ag has been seriously affected by adopting the flotation technology with high alkalinity medium at a copper sulfide ore in Yunnan.To solve this problem,low alkalinity medium,pyrite as inhibitors and Y-89 as collector were applied,and 20.91% Cu,72.90g/t Ag were obtained by using the process of single-stage roughing,three-stage cleaning and single-stage scavenging on the ore.The recovery of Cu and Ag attain 93.88% and 77.91%,which is very considerable.