HYDROMETALLURGICAL PROCESS FOR SEPARATING AND CONCENTRATING GOLD, PLATINUM AND PALLADIUM, AS WELL AS RECOVERING SELENIUM FROM ELECTROLYTIC COPPER REFINERY SLIMES AND SIMILAR NON-METALLIC MATERIALS

摘要

A hydrometallurgical process for enrichment of gold, platinum and palladium from copper electrolysis anode sludge, and simultaneously recovery of selenium, in which the sludge is treated with Cl2/HCl to transform the selenium of a hexavelent state and precipitate out silver chloride. The filtrate is then subjected to selective reduction of precipitate the noble metals and the resulting filtrate is chlorinated and a further reduction is effected to precipitate the metallic selenium.