Abstract:Effects of microwave activation time and activation temperature on pressure leaching behavior of chalcopyrite were investigated. Chalcopyrite and its leaching residue before and after microwave activation treatment were characterized by XRD and SEM. The results show that activation effect is enhanced by elongation of activation time, and the optimum activation temperature is 100 ℃. Microwave activation treatment can lead to de-stabilization of Cu-Fe-S and Fe-S bonds. Local fine cracks and holes can be formed on surface of chalcopyrite, thus promoting leaching of chalcopyrite. Microwave activation treatment can improve copper leaching and inhibit iron leaching.