Heap leaching of nickel containing ore
US6312500A · kind A · utility
14Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is provided for heap leaching ore to recover nickel. The process is particularly effective for ores that have a tangible clay component (i.e., greater than about 10% by weight). The process includes sizing the ore (where necessary), forming pellets by contacting ore with a lixiviant and agglomerating. The pellets are formed into a heap and leached with sulfuric acid to extract the metal values, including nickel. The leachate may be subjected to a nickel recovery operation without the need for intermediate neutralization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.