Research progress on hydrometallurgical process of valuable elements in copper anode slime
China is the largest copper producer in the world,and 80%of the copper is produced by fire metallurgy technology.The anode slime produced in the metallurgy process is rich in Cu,Ag,Au,Se,Te,and other valuable elements,which have high recovery value.In this paper,the mainstream technology of anode slime pretreatment is analyzed and compared.As a low-energy consumption and high-efficiency leaching technology,the hydrometallurgical process has been widely investigated in recent years.In this paper,the research progress of pretreatment of copper anode slime(CAS)was systematically reviewed.It summarized the pretreatment methods for copper anode slimes,including oxidative leaching and physical enhanced leaching.The recovery methods and reaction mechanism of Cu,Se,Te,Ag,and Au were summarized.Based on the current research progress,future should focus on greenness of the hydrometallurgical process and developing green reagents for leaching,complexing,extraction,and other processes.Moreover,the researchers need to enhance the recovery of rare and precious metals(Pt,Pd,Rh,etc.).Meanwhile,it is necessary to improve the ability to selectively separation different elements to obtain higher-purity products.
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