Prevention of Al.sub.2 O.sub.3 formation in pouring nozzles and the like
US4870037A · kind A · utility
13Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Sep 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/597
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention is directed to a lining composition for submerged entry pouring nozzles and like shapes used in the continuous casting of metals, particularly aluminum killed, low carbon steels. The lining prevents harmful buildup of alumina and other oxides within the nozzle bore which may cause premature nozzle clogging. The nozzle liner comprises a carbon-bonded, SiAlON-graphite refractory material. Small amounts of antioxidants and additional amounts of less expensive refractory grain or powder are also added to dilute the more expensive SiAlON material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.