Abstract:Zinc was recovered by acid pickling and cobalt was recovered by roasting - reduction leaching from purification cobalt residue of zinc hydrometallurgy. The results show that zinc and cobalt are effectively separated after acid pickling for 2 h with the L/S=2 and initial acidity of 35 g/L. Acid pickling residues are roasted under temperature of 500 ℃ for 30 minutes, cobalt leaching rate is 97.07% from calcine under the conditions including Na2SO3 dosing of 12%, initial acidity of 200 g/L, L/S=4, temperature of 80 ℃, and time of 3 h.