METHOD FOR CONCENTRATION OF PLATINUM GROUP METALS IN A SPENT ALUMINUM-BASED CATALYST BY PYROMETALLURGICAL METHOD Russian patent published in 2022 - IPC C22B11/02 C22B7/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the recovery of platinum group metals (PGM) and is a method for concentrating platinum group metals in a spent aluminum-based catalyst using a pyrometallurgical method. The spent catalyst is mixed with a collector, which is iron powder, in the amount of 5-40 wt. % by weight of the spent catalyst, while using the СаО-Al₂O₃-Fe₂O₃-В₂О₃slag system, and the mass fractions of CaO, Al₂O₃, Fe₂O₃ and В₂О₃ in the system are 35-50%, 40-60%, 5-10%, 10% respectively, and the sum of CaO, Al₂O₃, Fe₂O₃ and В₂О₃90%. After that, the resulting mixture is smelted at a temperature of 1500-1800°С and a partial oxygen pressure of 10^-3 atm to obtain Fe-MPG alloy after separation of the slag melt from iron.

EFFECT: method makes it possible to effectively separate the slag phase and the ferroalloy at a high recovery factor of platinum group metals.

4 cl, 1 dwg, 16 ex