Abstract:Copper smelting slag contains a large amount of valuable metal elements. After the beneficiation process, most of the copper is recovered. The selected slag concentrate is returned to the smelting furnace, and the slag tailings are sold to cement plants. The valuable metals still exist in the tailings. With greater utilization value, a magnetic separation process is added after the existing process flow. The iron concentrate after magnetic separation is used as a steelmaking ingredient the tailings are sold. This paper mainly introduces the smelting slag and tailings composition, the existing process tailings treatment method, the application and practice of the new process.