High Purity Gold and the method for being enriched with silver, platinum and palladium are prepared from silver anode slime

The invention discloses a kind of method for preparing High Purity Gold from silver anode slime and being enriched with silver, platinum and palladium, and clearing up silver separating residues using the silver-colored platinum palladium chloroazotic acid of the rich silvering solution recovery of nitric acid point silver, once unsaturated reducing process prepares high-purity gold process：Silver anode slime is leached into a point silver with nitric acid, in silvering solution is divided plus the heavy silver of sodium chloride obtains silver nitride precipitation and heavy silvering solution, iron replacement is added in silver nitride precipitation, gained raw Ag powder returns Kaldo Furnace melting, and sodium hydrogensulfite precipitate reduction recovery platinum palladium is added in heavy silvering solution；Silver separating residues are obtained into parting liquid and parting slag with chloroazotic acid parting, parting slag returns iron replacement step, the unsaturated reduction of sodium hydrogensulfite progress is added in parting liquid and obtains bronze and turmeric liquid, bronze is scrubbed, product ingot is obtained after dry, ingot casting, and turmeric liquid adds sodium hydrogensulfite secondary reduction recovery platinum palladium and obtains step before thick bronze returns.It this method solve the problem of silver anode slime leaches long flow path, reagent cost is high, cumbersome, equipment is more, the rate of recovery is low.