Separation of reduction bath materials from carbonaceous residues
Abstract
Abstract The invention relates to the recovery of reusable constituents from the spent cathodes from electrolytic furnaces used in the reduction of aluminum, which furnaces require to be shut down from time to time for maintenance or other purposes, at which stage they contain a spent cathode consisting of carbonaceous residues from the anode, metallic aluminum and cryolite. The constituents are recovered by crushing the spent cathode to reduce particle size and to form aluminum particles into flake aluminum; screening to remove flake aluminum and to separate the larger and smaller particles of the remaining constitutes; putting the particulate material through a ball mill i the form a slurry with salt water to prevent undue leaching; and separating the constituents of the ground particulate material by flotation.
Inventors
- 👤 Peter Anthony Vodic
Bibliographic Details
Claims Analysis
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |