Method and apparatus for the protection of molten metal flows in furnaces
US4480770A · kind A · utility
11Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1981 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Aug 19, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D41/42
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to the protection of the teeming flow or stream of molten metal contained in a vessel and passing through a plate-type valve or cut-off device of the kind comprising a stationary plate and a displaceable plate that is provided with at least one output nozzle. A gas which is substantially inert with respect to the metal and has a pressure slightly higher than atmospheric pressure is fed into the aforesaid device, and this gas surrounds the metal while the latter passes through the said device, in such manner as to isolate the same from the ambient air by an uninterrupted protective gaseous barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.