Vacuum treatment of molten metal with simultaneous stirring by helium injection
US6843826B2 · kind B2 · utility
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5References
8Claims
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Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Aug 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C7/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A vacuum treatment of cast metal in liquid form employing the steps of: introducing the cast metal in liquid form into a metallurgic ladle; filling the ladle until a guard height ranging between 0.4 and 0.6 m is reached; and treating the metal while bringing the atmosphere above the ladle under vacuum, and simultaneously stirring the cast metal by injecting helium into the base of the ladle during part of or the whole treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.