Process for recovering metals from refractory ores
US5104445A · kind A · utility
20Cited by
46References
53Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Feb 8, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is a process to recover metals from refractory ores. It involves the chlorination of an ore concentrate in the presence of solid salt at a temperature between 300.degree. and 650.degree. C. Thereafter, an oxidation step can be used to convert iron chloride to iron oxide. Subsequent separation steps remove the salt, gangue, and iron oxides. Separate pathways are described for precious and base metal recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.