Recovering copper from concentrates with insoluble sulfate forming leach
US4039406A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | May 7, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention provides a novel and an improved hydrometallurgical method for recovering copper values from copper concentrates. The method essentially comprises the following steps: A. forming an aqueous leach solution containing chloride or bromide ions in a predetermined concentration; B. dispersing copper concentrates in such leach solution to form a slurry; C. carrying out the leaching operation of the slurry at an elevated temperature and under an overpressure of oxygen so as to transform a major proportion of the copper values present in the concentrates into a solid basic copper sulphate; D. separating the resulting leach residue containing the basic copper sulphate from the leach solution; and E. recovering the copper values from the obtained leach residue. The process is simple and efficient and can be carried out either batchwise or continuously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.