Rhodium is expensive and plays an important role in modern industry. Its metallurgical materials include mineral platinum-group concentrates and secondary resources such as spent catalysts and spent alloys. This article introduces the leaching method of rhodium-containing metallurgical material in the refining process of precious metals. Different leaching methods apply to different materials. These methods are aqueous chlorination, aqua regia dissolution, oxidizing and electrochemical dissolution. The pre-treatment process before leaching includes alloying (metal trapping), sodium salt melting and medium temperature chlorination, etc. With the increase in the processing scale of rhodium-containing raw materials, the development of energy-saving, low-consumption, cost-effective, and green leaching processes is an important direction in the future. |