Recovery of gold and silver from complex refractory sulphide ores by cyanidisation and oxidation with peroxides
US5262136A · kind A · utility
3Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1991 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Dec 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of recovering precious metals from a silver bearing ore containing polybasite, pearcite, pyrargyrite, tetrahedrite or argentite by mixing the ore with an alkali metal or alkaline earth metal peroxide in slurry or solid, leaching the ore with a cyanide solution, and recovering the precious metals from the cyanide solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.