绿色矿冶

According to the characteristics of platinum-palladium concentrate in a copper smelting enterprise, the palladium purification process was designed as “ore washing→acid leaching→chlorination leaching→sodium sulfite reduction gold→platinum and palladium precipitation→platinum and palladium separation→palladium reduction ”, and the platinum purification process was designed as “ammonium chloroplatinate reduction→chlorination leaching→platinum precipitation by ammonium chloride→calcination”. The selection of purification equipment and industrial design were made, the economic benefits were briefly analyzed. The results showed that the recovery rates of platinum and palladium were more than 95.0% and 98.5%, respectively. The process can recover 12.0kg platinum powder and 107.6kg palladium powder per year, the annual increase income was 61.58 million yuan, and the annual investment cost was about 0.67 million yuan. The economic benefit of the project was remarkable.