Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant
US5354359A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 28, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2013 |
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 precious metal values from refractory precious metal ore materials containing preg-robbing carbon by leaching with a thiosulfate lixiviant, the process comprising PA1 a. providing a body of particles and/or particulates of an ore material having precious metal values and preg-robbing carbonaceous components; PA1 b. contacting the body of particles and/or particulates with a thiosulfate lixiviant solution at conditions conducive to the formation of stable precious metal thiosulfate complexes; PA1 c. recovering the thiosulfate lixiviant from the body of particles and/or particulates after a period of contact which is sufficient for the lixiviant solution to become pregnant with precious metal values extracted from the ore material; and PA1 d. recovering the precious metal values from the lixiviant solution. In a preferred embodiment, the refractory ore materials are low grade precious metal ore materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.