Alumina reduction cell
US4383910A · kind A · utility
4Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | May 21, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved alumina reduction cell is described in which the carbonaceous cathode includes refractory hard metal tiles projecting upwardly from the cell surface thereof, forming the true cathode surface, and a solid layer of alumina and cryolite beneath the molten aluminum produced within the cell and the alumina-cryolite bath from which the molten aluminum is obtained. This bottom alumina-cryolite layer protects the refractory hard metal-carbonaceous interface from attack by the molten aluminum, increasing the useful life of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.