Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate
US6428604B1 · kind B1 · utility
14Cited by
19References
12Claims
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Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach. After liquid-solids separation and purification of the concentrate resulting in the removal of copper and cobalt, the nickel-containing solution is directly treated by electrowinning to recover nickel cathode therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.