Process for removing alkali and alkaline earth elements from aluminum melts
US4832740A · kind A · utility
6Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Mar 14, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B21/064
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for removing alkali and alkaline earth metals from aluminum melts is such that aluminum fluoride powder is fed continuously to a carrier gas in an amount of 1-10 g/min. and the gas/powder mixture introduced continuously via lances into the melt which is maintained at a temperature between 690.degree. and 780.degree.C. The process is characterized by a low consumption of aluminum fluoride per ton of melt to be treated and is particularly suitable for removing sodium and lithium from aluminum-magnesium alloy melts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.