Abstract:For the purpose of identifying the effect of ore properties on the beneficiation index and establishing a reasonable process flow, a systematic process mineralogy research was conducted on a copper-sulfur ore in Yunnan province. According to the results, the oxidation rate of the ore is exceptionally low, and the copper minerals mainly exist in the form of copper sulfide ores, of which primary copper sulfide accounts for 94.74% of the total copper, and the main valuable elements that can be recovered are Cu and S, with the grades of 0.38% and 8.92%, respectively. The main metal minerals are pyrite, followed by chalcopyrite and sphalerite, with galena occasionally observed; the gangue minerals are mainly composed of quartz, sericite, sericite feldspar, chlorite, siderite etc. Part of the chalcopyrite is wrapped with pyrite particles, and the selection of suitable grinding fineness is the key to achieve effective separation of copper and sulfur. In view of the above process mineralogical characteristics, it is proposed to choose a flotation principle process of one section of grinding, priority copper separation, tailing and then sulfur separation.