FIELD: metallurgy.
SUBSTANCE: invention relates to the metallurgy of precious metals and can be used in the refining processing of silver-containing raw materials (Dore alloys) with a gold content of up to 45%. Gold-silver alloys are leached in a nitric acid solution in the presence of oxygen supplied under pressure. Leaching is carried out at a temperature of 60-100°C and at vigorous stirring. The initial concentration of nitric acid in the solution is determined by calculation, with the provision of the final concentration of nitric acid in the solution from 50 to not less than 750 g / dm3, depending on the content of gold in the alloy.
EFFECT: invention provides the dissolution of silver over 95% of the original weight in the alloy, in which the gold content can reach 45%, at a maximum rate.
9 cl, 1 tbl, 15 ex
| Title | Year | Author | Number |
|---|---|---|---|
| REFINED SILVER PRODUCING METHOD | 2004 |
|
RU2280086C2 |
| METHOD FOR PROCESSING SULFIDE CONCENTRATES CONTAINING NOBLE METALS | 2017 |
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RU2654407C1 |
| METHOD OF SAMPLE DECOMPOSITION AT DETERMINATION OF PRECIOUS METALS IN CARBONACEOUS ROCKS | 2010 |
|
RU2409810C1 |
| PROCESS OF WINNING OF SILVER FROM ITS ALLOYS | 1996 |
|
RU2100484C1 |
| METHOD FOR PRODUCING SILVER AND PLATINUM GROUP METALS | 2018 |
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RU2680552C1 |
| METHOD OF GOLD RECOVERY FROM SOLID SILVER-CONTAINING SULFIDE ORES OF CONCENTRATES AND OF SECONDARY RAW MATERIALS | 2017 |
|
RU2657254C1 |
| METHOD OF HYDROMETALLURGICAL RECOVERY OF RARE METALS FROM TECHNOLOGICALLY PERSISTENT RAW MATERIAL | 1995 |
|
RU2114196C1 |
| TREATMENT METHOD OF ZINC-BEARING GOLDEN-SILVER CYANIC SEDIMENTS | 2007 |
|
RU2351667C1 |
| METHOD FOR PROCESSING POLYMETALLIC SULPHIDE MATERIALS OF NON-FERROUS METALS | 2022 |
|
RU2796344C1 |
| METHOD FOR PROCESSING OF REBELLIOUS SILVER-, GOLD-CONTAINING MATERIALS, ORES AND CONCENTRATES | 1993 |
|
RU2033446C1 |
