Method for extraction of metal lead, silver, zinc, indium and germanium from lead sulfate slag

Belonging to the technical field of wet metallurgy, the invention discloses a method for extraction of metal lead, silver, zinc, indium and germanium from lead sulfate slag. The method comprises the steps of: (1) leaching the lead sulfate slag with a sodium hydroxide solution to obtain a leaching solution and leaching residue; (2) conducting electrolysis on the leaching solution in step (1) to obtain an electrolysis residual liquid, anode mud and metal lead; (3) leaching the anode mud in step (2) with sulfuric acid, recovering germanium from the leaching solution, and performing volatilization treatment on the leaching residue; (4) conducting oxidizing leaching on the leaching residue in step (1) with hydrogen peroxide and sulfuric acid, recovering zinc and indium from the leaching solution, and taking the leaching residue for standby use; and (5) leaching the leaching residue in step (4) with thiourea and urea, recovering metal silver from the leaching solution, and performing volatilization treatment on the leaching residue. According to the invention, the recovery rates of lead, zinc, indium, germanium and silver are high and all reach over 90%, the produced product has high quality, and the production cost is low.