Abstract:In order to solve the problem of high exterior processing costs and loss of valuable components of arsenic filter cake for copper smelting enterprises, the process test of leaching arsenic filter cake with sulfuric acid was carried out. The effects of sulfuric acid concentration, leaching pressure, leaching temperature, leaching time and liquid-solid ratio on the leaching effects of arsenic filter cake were investigated, and the effects of different crystallization temperatures on crystallization of arsenic trioxide were studied. The arsenic cake was treated harmlessly, and the arsenic in the cake was converted into arsenic trioxide, which saves the cost of outsourcing treatment and recovered the valuable components such as copper and sulfur.