Low oxygen-content metallurgical silicon and ferrosilicon
US5782955A · kind A · utility
3Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A metallurgical silicon or ferrosilicon in the form of granulates having an average size of less than 10 mm and in which the total oxygen concentration is less than 0.05% by weight, and a process for manufacture of this silicon or ferrosilicon consisting of a carbothermal reduction of silica in an electric oven, chlorine-based refining of the liquid metal, and granulation of the refined liquid metal in water under an inert atmosphere. The silicon may be used for silicone manufacture or as a constituent of an aluminum alloy, and the ferrosilicon, as a steel additive used to obtain magnetic sheet metals for electrical construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.