Burned high purity refractories with low soluble chromium
US5219807A · kind A · utility
7Cited by
15References
43Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 27, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jun 27, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/42
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A burned, high-purity refractory, specifically a chrome-alumina, alumina-chrome and picrochromite composition, which contains less than 5 ppm total soluble chromium. Such products are obtained by adding to the starting mix less than 5 wt. % (often less than 3 wt. %) zircon, titania, molybdic oxide, boric acid, carbon black, or silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.