Extracting Cu,Co, and Fe from white alloy with HCl by adding H2O2

White alloy, mainly containing Cu, Co, and Fe, has been successfully decomposed in HCl solution by adding H₂O₂. This process is discussed in this paper. Through exploratory experiments, hydrochloric acid and H₂O₂ solution were confirmed as the leaching system of white alloy and through a series of condition experiments the effect of HCl concentration, H₂O₂ addition amount, reaction temperature, reaction time, particle size, and liquid-solid ratio of the extraction are studied. The optimal leaching conditions are 5 mol/L HCl concentration, 1.85 mL H₂O₂/g white alloy H₂O₂ addition, 70°C reaction temperature, 90 min. reaction time, 100 mesh particle size, and a 5/1 liquidsolid ratio. With these conditions the extraction of Cu and Co exceeds 99.5%, and the extraction of Fe can reach 98.5%. The results show the addition of H₂O₂ and the introduction of Cl⁻ are very important factors to improve the extraction of metal.