METHOD OF RECOVERY OF NOBLE METALS FROM ORES AND MATERIALS Russian patent published in 1997 - IPC

FIELD: methods of recovery of noble metals from ores and materials include adding of manganese-containing material to ore or materials, treatment of ore or materials with aqueous solution of acid in the presence of chloride ions, chemical reduction of manganese, and recovery of noble metals and manganese into productive solution, recovery of noble metals from productive solution and obtaining of spent manganese-containing solution. SUBSTANCE: spent manganese-containing solution is treated with alkali reagent and oxidizer to obtain precipitate of manganese oxide, which is mixed with initial manganese-containing material, and obtained mixture is introduced as addition into initial ore or materials. EFFECT: higher efficiency. 1 tbl