Treatment of refractory carbonaceous sulfide ores for gold recovery
US4923510A · kind A · utility
43Cited by
6References
14Claims
0Family size
Inventors
Key dates
| Filing date | Sep 13, 1989 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Sep 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B11/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation; the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any economic basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.