Hot injection ladle metallurgy
US4541866A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Jan 26, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C7/064
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preheating a ladle addition to a melt contained in an enclosed or covered ladle without significant loss of melt temperature. A gas stream is heated in a non-transferred arc electric arc heater to a temperature in excess of that of the melt. The ladle addition is introduced into the heated gas stream in the arc heater downstream of the arc heater wherein its temperature is increased to be about equal to or greater than the melt temperature. The heated gas stream and the entrained ladle addition is then introduced into the ladle. As the gas stream impinges on the melt, the ladle addition separates out and combines with the melt with the resulting off-gas being exhausted from the ladle. The off-gas can be recycled to the arc heater for reuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.