Beneficiation of heavy minerals from bituminous sands residues by dry screening
US4225422A · kind A · utility
Assignees
- Petro-Canada Exploration, Inc.
- Her Majesty the Queen in right of the Province of Alberta, Government of the Province of Alberta, Department of Energy and Natural Resources, Alberta Syncrude Equity
- Pan Canadian Petroleum Limited
- Esso Resources Canada Limited
- Canada-Cities Service, Ltd.
- Gulf Canada Resources Limited
Inventors
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Sep 17, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B1/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The titanium and zirconium-based minerals, present in the first stage centrifuge tailings from the hot water process for extraction of bitumen from bituminous sands, may be concentrated by a dry screening process. The tailings are burned off to provide a dry, essentially carbon-free, mineral mixture. By screening the mixture into three streams of different particle size range, silica and clays may be rejected as coarse and fine materials respectively, while titanium and zirconium minerals may be concentrated in the intermediate stream. The titanium and zirconium concentrate stream may be advanced to high tension and magnetic separation steps known in conventional processing of heavy minerals, for further beneficiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.