Sulfuric acid leaching of nickeliferous laterite
US4044096A · kind A · utility
24Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1975 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B23/043
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The leaching efficiency of nickeliferous lateritic ore is optimized by scalping the ore to remove a coarse low-nickel fraction and provide a fine nickel-rich fraction which is then high pressure leached in a sulfuric acid solution by controlling the parameters temperature, pulp density, the rate of acid addition, leaching time, agitation rate, etc., whereby a pregnant solution is obtained with the nickel to (Fe+Al+Cr) ratio exceeding about 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.