Cathode assembly for electrolytic aluminum reduction cell
US4224128A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1979 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | Aug 17, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Described is a cathode assembly for an electrolytic cell for the production of metal, e.g., aluminum, by electrolysis of molten electrolyte containing a compound of the metal, e.g., alumina. The cathode assembly comprises pedestals, e.g., a carbon pedestal, disposed on the cell floor beneath the shadow of the anode of the cell. The pedestal rises from the cell floor to a height of at least the highest interface of the metal pad and molten electrolyte that exists during cell operation. Embedded in the pedestal is at least one refractory hard metal element, e.g., titanium diboride, which is embedded to a depth of at least about 75 percent of its length. The refractory hard metal element(s) can be flush with the top surface of the pedestal; but, preferably protrude slightly from the top surface of the pedestal. The refractory hard metal element can be a solid or hollow body, e.g., cylinder. The pedestal can have a refractory hard metal surface for its side walls and be shaped to assist in the drainage of molten aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.