Sub-cathodic shield with deformable zones for Hall-Heroult electrolysis cells
US4488955A · kind A · utility
3Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1984 |
| Grant date | Dec 18, 1984 |
| Priority date | — |
| Expiry date | May 14, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/085
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A subcathodic shield for use with Hall-Heroult electrolysis cells. The shield, which is located below the carbonaceous blocks which make up the cathode, and above the cell housing, comprises at least one continuous steel sheet at least 5 mm thick extending substantially over the total area between the base of the cathode and the base of the housing, and which has at least one deformable zone for absorbing thermal stresses caused by differences in temperatures between the shield section situated below the central area of the cathode and the shield section situated below the peripheral areas of the cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.