Abstract:New technology of pressure leaching of mixed materials of calcine produced by high-nickel and high-selenium copper anode mud roasting in rotary kiln and low-nickel and low selenium copper anode mud was studied. Effects of mixture ratio, leaching acidity, temperature, pressure, time, and L/S on leaching rates of Ni, Cu, Te, Ag, Se pressure leaching process were investigated. The results show that selenium and silver in mixture are effectively inhibited with high leaching rates of Ni, Cu and Te and low tellurium content in leaching residue under the conditions including mass ratio of calcine and copper anode mud of 1︰2, leaching acidity of 100-120 g/L, temperature of 160-170 ℃, pressure of autoclave of 0.8 MPa, L/S of 4︰1, and reaction time of 5 h. This new technology is successfully applied to production practice.