Aluminum smelting temperature selection
US3951763A · kind A · utility
11Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1975 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Mar 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for producing aluminum in which alumina is decomposed electrolytically to aluminum metal in an electrolyte bath between an anode and a cathodic interface formed between aluminum metal and the electrolyte bath. The bath consists essentially of Al.sub.2 O.sub.3, NaF, and AlF.sub.3, and has a weight ratio NaF to AlF.sub.3 up to 1.1:1. During decomposition, the bath is maintained at an operating temperature greater than 40.degree.C above the cryolite liquidus temperature of the bath and effective for preventing bath crusting in interfacial areas between bath and aluminum metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.