Aluminium electrolytic reduction cell linings
US4647357A · kind A · utility
6Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jun 6, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/085
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention concerns cells for production of Al by electrolysis of an alumina-containing electrolyte based on cryolite and having a lining based on alumina for containing the electrolyte. A layer containing an alkali or alkaline earth metal compound, e.g. sodium aluminate, is included in the lining, preferably around the 880.degree. C. isotherm when the cell is in operation. On penetration of the lining by the electrolyte, the compound dissolves in or reacts with the electrolyte so as to raise the solidus and reduce or prevent further penetration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.