NOUFERROUS METALLURGICAL EQUIPMENT

The concentration of arsenic in the indium extractant residue recovered from a zinc smelter in Gansu province is high, and the removal of arsenic by neutralization precipitation method will easily lead to the loss of a large amount of valuable metal zinc. In this paper, the application advantages of H2S in the treatment of waste acid in nonferrous industry to remove high concentration arsenic are discussed，The results show that the controlled removal of arsenic from indium residue can be realized by H2S curing process，the higher the hydrogen sulfide flux, the higher the arsenic removal efficiency, When the influent of hydrogen sulfide is 1.15 times of the theoretical dosage, the arsenic concentration in the secondary sulphide effluent can be controlled below 0.05g/L, and the arsenic removal rate is up to 99.63%, At the same time, it can reduce the loss of zinc in the process of production, and can produce certain economic benefits, so it has a certain application prospect.