Abstract: Provided is a mineral processing method that can efficiently separate a copper mineral and a molybdenum mineral. A mineral processing method includes a conditioning step of adding a disulfite to a mineral slurry containing a copper mineral and a molybdenum mineral and a flotation step of performing flotation using the mineral slurry after the conditioning step. By selectively enhancing hydrophilicity of the copper mineral with the disulfite, the hydrophilicity between the copper mineral and the molybdenum mineral can be differentiated. Thus, the molybdenum mineral can be selectively floated, and the copper mineral and the molybdenum mineral can be efficiently separated.

Abstract: There is provided a method for separating an arsenic mineral from a copper-bearing material containing arsenic, such as a copper ore or a copper concentrate, to obtain a copper concentrate with low arsenic grade. The method for separating an arsenic mineral from a copper-bearing material by flotation includes adding a flotation agent containing a depressant, a frother, and a collector to a slurry composed of a copper-bearing material containing arsenic, and blowing air into the slurry to float a copper concentrate, wherein the depressant is sodium thiosulfate. The sodium thiosulfate is preferably added in an amount of 10 kg or more and 200 kg or less in terms of sodium thiosulfate pentahydrate per ton of copper-bearing material to be subjected to flotation. Further, the oxidation-reduction potential of the slurry to be subjected to flotation, as measured against a silver/silver chloride reference electrode, is preferably ?10 mV or more and 50 mV or less.

Abstract: There is provided a method for separating an arsenic mineral from a copper-bearing material containing arsenic, such as a copper ore or a copper concentrate, to obtain a copper concentrate with low arsenic grade. The method for separating an arsenic mineral from a copper-bearing material by flotation includes adding a flotation agent containing a depressant, a frother, and a collector to a slurry composed of a copper-bearing material containing arsenic, and blowing air into the slurry to float a copper concentrate, wherein the depressant is sodium thiosulfate. The sodium thiosulfate is preferably added in an amount of 10 kg or more and 200 kg or less in terms of sodium thiosulfate pentahydrate per ton of copper-bearing material to be subjected to flotation. Further, the oxidation-reduction potential of the slurry to be subjected to flotation, as measured against a silver/silver chloride reference electrode, is preferably ?10 mV or more and 50 mV or less.