Recovery of silver, copper and zinc from partially roasted pyrite concentrate by ferric sulphate leaching
US4177067A · kind A · utility
3Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Apr 17, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for treating a pyrite concentrate containing silver, copper and zinc to recover the metals contained therein is disclosed. The process includes the partial roasting of the concentrate to open the pyrite matrix to solution penetration followed by hydrometallurgical steps, including ferric sulphate leaching, reduction leaching, solid-liquid separation and metal extraction steps, to recover the copper and zinc separately and silver in concentrated form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.