FIELD: noble metal metallurgy, namely processes for producing refined silver.
SUBSTANCE: method comprises steps of dissolving metallic silver in nitric-acid electrolyte at presence of hydrogen peroxide; separating non-soluble remainder; extracting silver out of electrolyte; returning electrolyte for dissolving metallic silver. Metallic silver is dissolved at its flow rate 1.9 -2.0 kg per kg of nitric acid contained in electrolyte. Powdered silver produced from silver chloride by hydro-chemical reduction is used as metallic silver. Silver is extracted out of electrolyte at content of nitric acid in electrolyte in range 30 - 50 g/dm3 and at temperature of electrolyte no more than 35°C.
EFFECT: simplified technological system for producing refined silver.
2 tbl, 15 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS OF WINNING OF SILVER FROM ITS ALLOYS | 1996 |
|
RU2100484C1 |
| METHOD OF PREPARING AFFINATED SILVER FROM INDUSTRIAL PRODUCTS | 1993 |
|
RU2049131C1 |
| TREATMENT METHOD OF ZINC-BEARING GOLDEN-SILVER CYANIC SEDIMENTS | 2007 |
|
RU2351667C1 |
| METHOD OF SILVER PURIFICATION | 1992 |
|
RU2034063C1 |
| METHOD FOR PRODUCING SILVER AND PLATINUM GROUP METALS | 2018 |
|
RU2680552C1 |
| METHOD FOR PRODUCING REFINED SILVER FROM INTERMEDIATE PRODUCTS OF PRECIOUS METAL PRODUCTION CONTAINING SILVER IN THE FORM OF CHLORIDE | 2021 |
|
RU2779554C1 |
| DEVICE FOR ELECTROLYTIC REFINEMENT OF SILVER | 1991 |
|
RU2022041C1 |
| METHOD REFINING SILVER-GOLD ALLOYS | 2008 |
|
RU2386711C1 |
| METHOD TO PROCESS ALLOY OF LIGATURE GOLD | 2012 |
|
RU2516180C1 |
| METHOD FOR EXTRACTING PLATINUM AND PALLADIUM FROM SILVER ELECTROLYTES | 2021 |
|
RU2758043C1 |
