云南铜资源丰富，但多属低品位矿，用常规方法冶铜，很难获得很好的经济效益。近年来，该省采用浸出———萃取———电积技术生产阴极铜，大量利用了低品位铜资源，湿法冶铜的发展已从深度和广度上取得突破性进展。云南湿法冶铜技术应用初期，工厂规模很小，年产阴极铜仅２０ Yunnan is rich in copper resources, but mostly low-grade mines. It is difficult to obtain good economic benefits by using conventional methods to smelt copper. In recent years, the province uses leaching --- extraction --- electrowinning technology to produce cathode copper, make extensive use of low-grade copper resources, the development of wet-process copper has made a breakthrough from the depth and breadth. At the initial stage of application of wet-process copper metallurgy in Yunnan Province, the plant scale is very small, with an annual output of only 20 cathode copper