Ladle refining apparatus and ladle refining method using it
US6666902B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2003/161
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a lade refining apparatus capable of suppressing skull deposition in a vacuum/decompression chamber and performing molten steel agitation, slag reforming and degassing efficiently, and a ladle refining method using the apparatus. The apparatus includes a vacuum/decompression chamber directly coupled to a top of a ladle, and is designed to have inert gas blown into the ladle for agitation of molten steel in the ladle. An inner diameter of a shaft of the vacuum/decompression chamber is not larger than an inner diameter of a top end of the ladle, but not smaller than a projected diameter of a bulging portion of a molten steel surface formed by the gas blown into the ladle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.