Process for refining crude magnesium
US5282882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B26/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process for refining crude magnesium, and, in particular, the magnesium obtained by reducing the magnesium ore using iron-silicon. The process consists in treating the liquid magnesium with a metallic sulphide such as iron monosulphide, iron bisulphide or molybdenum bisulphide. The sulphides are contacted with the metallic bath which is agitated to promote the liquid-solid reactions and the formation of insoluble products which precipitate. This contacting is followed by decantation of the insoluble products and their separation from the refined magnesium. The process permits a significant reduction in the contents of calcium and silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.