The project originally included a 600-ton-per-year precious metal catalyst processing capacity and a 2000-ton-per-year silicon waste comprehensive utilization project. To enhance its competitiveness, an additional 2400-ton-per-year precious metal catalyst processing capacity was added. Therefore, starting in November 2020, the company signed three contracts to construct a palladium refining production line, renovate its No. 2 and No. 1 production workshops and R&D building, and be responsible for the waste gas treatment of No. 1, No. 2 workshops and the R&D building.
The main raw materials for this project are waste catalysts containing platinum, palladium, rhodium, gold, iridium, and ruthenium. A roasting pretreatment + hydrometallurgical process is used to recover palladium, platinum, rhodium, gold, iridium, and ruthenium trichloride. Waste ternary catalysts are used as raw materials, employing a smelting pretreatment + hydrometallurgical process to recover palladium, platinum, and rhodium. Waste silver catalysts are used as raw materials, employing desilvering + electrolysis + hydrometallurgical process to recover silver. Corresponding auxiliary facilities and waste gas treatment projects are included, achieving an annual output of 64 tons of rare and precious metals and their compounds.
