METHOD FOR TREATING ANODE SLIME OF COPPER ELECTROLYSIS

摘要

PURPOSE: A method for treating anode slime of copper electrolysis is provided to develop anode slime wet type treating process capable of efficiently separating platinum group·gold and selenium·tellurium and efficiently separating and recovering the selenium and tellurium. CONSTITUTION: The method comprises the processes of performing pretreatment by passing the anode slime through decopper process, chloridation process and gold extraction process; and performing a treatment comprising the steps of obtaining platinum group·gold contained tailings by blowing sulfur dioxide diluted to a concentration of 8 to 12% using air to the obtained gold extracted solution at a temperature of 60 to 90 deg.C in the amount of 8 to 15 times of mole concentration of the platinum group·gold with chlorine ion concentration in the gold extracted solution being maintained to 1.5 mol/L or less, thereby separating the platinum group·gold and selenium·tellurium remained in the gold extracted solution, obtaining selenium contained tailings by blowing sulfur dioxide to the platinum group·gold separated solution in the amount of 2 times or less of mole concentration of selenium at a temperature of 60 to 90 deg.C as maintaining chlorine ion concentration in the platinum group·gold separated solution to 2.0 mol/L or less and maintaining concentration of selenium in the solution to 3 g/L or more, and obtaining tellurium contained tailings by blowing sulfur dioxide to the selenium separated solution at a temperature of 60 to 90 deg.C.