Leaching of metal values from various ores
Abstract
Abstract IN A METHOD OF RECOVERING VANADIUM OR MOLYBDENUM METAL VALUES FROM THE ASH OF A ROASTED ORE BY LEACHING AN AQUEOUS SLURRY THEREOF WITH A WATER SOLUBLE REAGENT OF THE CARBONATE/BICARBONATE TYPE, THE IMPROVEMENT COMPRISING FIRST MAINTAINING THE SLURRY IN THE PRESENCE OF FREE LIME FOR A SUFFICIENT PERIOD AT A SELECTED TEMDPERATURE TO CONDITION THE ASH, THEREBY SIGNIFICANTLY INCREASING THE RECOVERY OF METAL VALUES THEREFROM IN THE SUBSEQUENT LEACHING STEP. TYPICALLY THE SLURRY IS CONDITIONED FOR A PERIOD OF ABOUT 1/2 DAY AT A TEMPERATURE OF ABOUT 80* C. SINCE CALCIUM CARBONATE IS DECOMPOSED READILY BY ROASTING INTO FREE LIME, THE INVENTION IS VERY CONVENIENTLY APPLICABLE TO ORES CONTAINING A HIGH CONTENT OF CALCIUM CARBONATE.
Inventors
- 👤 B Hardwick
- 👤 J Patterson
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |