中国有色冶金

A large amount of dust is produced in the process of copper smelting, and about 10%~50% of the associated arsenic in the concentrate enters it. At the same time, the dust also contains valuable elements such as Cu, Zn, Pb, Bi, Au and Ag, which need to be recovered and harmlessly treated.The hydrometallurgy process for arsenic-containing dust treatment has the advantages of high metal recovery rate, good separation effect of valuable elements and low investment cost. However, there are some disadvantages, such as long process flow and separate treatment of leaching residue.The pyrometallurgy process has the advantages of short process flow and large processing capacity. The arsenic products are mostly arsenic oxides or elemental arsenic with high purity, which is convenient for further purification and resource application of arsenic. However, there are some disadvantages such as high energy consumption and reprocessing of products.The combined process of hydrometallurgy and pyrometallurgy to treat arsenic-containing dust has obvious advantages in metal recovery rate and product quality. Arsenic can be curing and stabilized , and As2O3 or arsenic products can be produced. At the same time, valuable metals such as lead, zinc, copper and bismuth in dust can be comprehensively recovered, which is the current mainstream direction.The treatment methods of arsenic-containing materials are mainly harmless disposal and resource utilization. Exploring the new arsenic productcan bring good benefits to society, environment and economy. In the future, thein-situ collaborative treatment of arsenic-containing materials and the production of arsenic are important directions for future development.