Process for lowering the concentration of sodium in aluminum melts
US4138246A · kind A · utility
2Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Mar 22, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B21/066
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.