Secondary Electrolytic Enrichment of Nickel Anode Mud and Concentrated Sulfuric Acid Leaching

Keer Bang Hong Kong and Canada (Port Colbome) a nickel anode sludge treatment plant Ke Bier Cliff containing 35% Ni, 20% Cu, 2% ~ 3% Fe, 0.5% ~ 0.8% noble metal. The plant mixes the dry anode mud with carbon sufficient to reduce copper and nickel, and smelts the slag in a 9t small reverberatory furnace (about 4.7m×1.5m) for burning oil to produce a separate electrolysis system for the anode plate in the nickel sulfate electrolyte. Secondary electrolysis is carried out in the middle. The secondary anode mud of the enriched precious metal is sieved to remove the residual crumb, and then digested with concentrated sulfuric acid, and leached and washed to remove copper and residual nickel and iron , and the total amount of precious metal is 45%. ~60% of the leaching slag is shipped to the Accton refinery in London for refining. After the leachate is replaced with copper and the precious metal is recovered, the solution is sent to copper electrolysis for use as an electrolyte.