Abstract:This paper takes steamed selenium residue after sulfate roasting of copper anode slime as the research object. The effects of the primary water leaching in copper separation and secondary water leaching in copper separation on silver leaching rate and copper separation rate were studied through the test. The experiment result showed that the secondary water leaching in copper separation can effectively increase the silver leaching rate of steamed selenium residue and reduce the copper slag separating rate. After one year of production practice, it is concluded that secondary water leaching in copper separation can improve the production index of subsequent processes, create good economic benefits, and have certain promotion value.