Pretreatment/agglomeration as a vehicle for refractory ore treatment
US4961777A · kind A · utility
9Cited by
10References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 3, 1988 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Aug 3, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An agglomerative heap leaching method for recovering gold, silver or other metals from low grade refractory ores. Hypochlorite compounds are incorporated directly into the ore agglomerates as they are formed. This provides ample time and opportunity for the hypochlorite to destroy, modify or passivate refractory components of the ore thereby improving metal recovery in the subsequent cyanide leaching step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.