Treatment of refractory carbonaceous and sulfidic ores or concentrates for precious metal recovery
US4902345A · kind A · utility
52Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B11/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The recovery of precious metals from refractory carbonaceous and sulfidic ores or concentrates is improved by subjecting an oxidized slurry of this type of ore to thiourea leaching in the presence of carbon instead of subjecting the slurry to cyanidation leaching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.