Potassium butyl xanthate is a flotation reagent with strong collection ability, which is widely used in mixed flotation of various non-ferrous metal sulfide ores. This product is particularly suitable for flotation of chalcopyrite, sphalerite, pyrite, etc. Under specific conditions, it can be used to preferentially flotation copper sulfide from sulfide iron ore, or to select sphalerite activated by copper sulfate for flotation.