Carbon-containing refractory
US4471059A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1983 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Feb 4, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9676
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Carbon in the form of graphite is commonly used in refractories for metallurgical purposes because of its ability to increase resistance to corrosion. However, if the graphite in the refractory becomes oxidized, it greatly loses this ability. For this reason, it is very important for a refractory to have good resistance to oxidation, but there are at present no refractories fully satisfactory from the standpoints of resistance to oxidation and hot strength. The present invention is a carbon-containing refractory having excellent resistance to oxidation and hot strength. These favorable properties are obtained by the addition in the refractory of both boron carbide and metal powder, the powder comprising at least one metal selected from Al, Si, Fe, and Ni.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.