Hydrometallurgical extraction of precious metals: The essence of hydrometallurgical technology is to directly dissolve aluminum group metals from a carrier using hydrochloric acid and a strong oxidizing agent or other special chemical reagents (such as cyanide), and then further enrich and extract platinum group metal products from a low-concentration bath.
Currently, various pyrometallurgical techniques can all achieve the goal of recovering platinum group metals. However, the complexity of the processes, technical and economic indicators, ease of engineering implementation, and environmental impact vary greatly among different methods.
