Pressure chlorination of refractory gold ores
US5236676A · kind A · utility
5Cited by
8References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic and/or carbonaceous matter. The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure. The chlorine used in this pressure chlorination pretreatment can be in either the gaseous or liquid state. Following the removal of residual chlorine from the pretreated ore slurry, said slurry is transferred to a conventional cyanide leach/carbon adsorption circuit to recover the gold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.