Alumina-zircon bond for refractory grains
US3972722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1974 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Mar 4, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/106
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This disclosure concerns a thermo-chemical bonded refractory product which comprises inactive refractory grains bonded together by mullite. The refractory is emplaced in a furnace or other pyro-processing unit by pressing, ramming, gunning, casting, etc. The refractory product is made by mixing inactive refractory grains with a mixture of zircon and alumina powders and a small amount of an alkaline earth oxide catalyst. The catalyst breaks the zircon down into ZrO.sub.2 and SiO.sub.2 at relatively low temperatures. The SiO.sub.2 thus liberated is unusually reactive and reacts with the alumina to form mullite and the ZrO.sub.2 adsorbs the alkaline earth oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.