Process for pneumatic stirring of a bath of molten metal
US4397684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1982 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Mar 4, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B9/05
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process of pneumatic stirring of a bath of molten metal according to which a stirring fluid is injected through permeable refractory elements arranged at the bottom of a crucible containing the bath, in which the used stirring fluid is, at least temporarily, an organic liquid such as hydrocarbon. The process is advantageously used on a bath of molten pig iron during refining of the same by oxygen, and in which the organic liquid is replaced immediately after decarburization of the bath by an inert gas such as argon or nitrogen. The process thus permits an efficient stirring of the bath of molten metal without the risk of polluting the metal either by hydrogen or nitrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.