Aqueous oxidation of sulfidic silver ore
US5256189A · kind A · utility
7Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | May 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Refractory sulfidic silver ore which is not amenable to cyanide leaching is formed into an aqueous slurry and oxidized at elevated temperature, usually about 150.degree. to 250.degree. C., in the presence of an oxidizing agent, usually oxygen, and in the presence of about 30 to about 160 g/L zinc. Zinc present in the above range results in increased extractability of silver from the oxidized residue by cyanide leaching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.