Process for the passivation of ferrosilicon
US4050957A · kind A · utility
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4References
5Claims
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Assignee
Inventor
Key dates
| Filing date | Oct 8, 1975 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Oct 8, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for the passivation of discrete particles of ferrosilicon containing 30-90% by weight silicon comprises contacting the particles with a gaseous oxidizing agent at a temperature between 800.degree.-1150.degree. C for a time ranging between 1-12 hours. The treated particles can be admixed with a binding agent to form a paste which, in turn, is used as a coating for shielded arc electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.