Apparatus for lowering the concentration of sodium in aluminum melts
US4174826A · kind A · utility
1Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1978 |
| Grant date | Nov 20, 1979 |
| Priority date | — |
| Expiry date | Oct 13, 1998 |
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.