Basic free-flowing casting material and preforms produced thereform
US6548435B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/66
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to free-flowing refractory castable material and castings produced therefrom. Refractory nonbasic and basic refractory castable materials have been known for a long time. The traditional refractory castable materials have thixotropic properties and must be lined sing vibration technology. In the past, free-flowing refractory castable materials were solely based on alumina raw materials. Attempts to produce an aqueous, highly concentrated basic suspension which would Coma the basis of free-flowing refractory castable materials failed to meet the requirements in terms of theological properties and a low degree of to hydration of the MgO-based materials. It is the aim of the invention to provide the above-mentioned refractory castable material for the monolithic lining or repair of high-temperature equipment and for the production of refractory castings. This is achieved by providing a fine-grained and a mixed fine and coarse-grained alternative. For the fine-grained alternative a refractory, dilatancy-promoting material on MgO basis with a grain size between 0.1 and 45 &mgr;m and at least one dilatancy-promoting dispersing and wetting agent is employed with the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.