Refractory immersion spout
US4423833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1982 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Jan 5, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D41/505
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A refractory immersion spout includes a spout member having an upper portion and a lower portion. The spout member has a pouring channel and outlet openings extending laterally from the pouring channel. A refractory sleeve covers the outer surface of at least a portion of the lower portion of the spout member. The spout member comprises an extrusion product resulting from the extrusion of a material including 30-75% alumina and 10-30% carbon, with the carbon being aligned longitudinally of the spout member as a result of the extrusion. The sleeve comprises an isostatically compressed member formed of a highly refractory material. The thickness of the lower portion of the spout member is less than the thickness of the upper portion of the spout member, such reduction in thickness resulting from a reduction of the outer size of the spout member. The sleeve is cemented onto the outer surface of the lower portion of the spout member by an alumina-rich refractory cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.