Abstract:Pre-neutralized liquid of zinc concentrate oxygen pressure leaching solution was purified by zinc powder replacement method applying pre-neutralized liquid of zinc concentrate oxygen pressure leaching solution and first stage residue as raw materials. The results show that precipitation rate of Cd, Ga, and Ge is 87.53%、86.62%、97.83% respectively, under the conditions including volume of pre-neutralization solution of 1 L, dosage of zinc powder of 8.33g, replacement temperature of 65 ℃, stirring time of 90 min, and stirring speed of 300 r/min. Most of Cu, Cd, Ga, and Ge entering replacement slag are enriched. Return of first stage residue can improve utilization rate of zinc powder and reduce production cost.