Process for protecting against oxidation and/or nitridation of a liquid metal stream and device for carrying out the process
US4805688A · kind A · utility
Inventors
Key dates
| Filing date | Aug 12, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Aug 12, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/106
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for protecting against oxidation and/or nitridation of a liquid metal stream flowing from the outlet orifice of a ladle or a distribution vessel, comprising surrounding the pouring stream with a tube substantially throughout the height of the stream and injecting a protective gas at least around the pouring stream so as to minimize the contact of the molten metal with the ambient air and avoid the dilution of the protective gas and the aspiration of ambient air. A device for carrying out the process includes two complementary semi-shells for surrounding the pouring stream and a hinge articulating the semi-shells for opening and closing the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.