Refractory mix composition and method of preparation
US4174226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Oct 13, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00086
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to an alumina based, phosphate bondable, dry refractory mix composition exhibiting an extended shelf life of up to eighteen months and longer. The mixture has the following preferred composition on a weight percentage basis: 40-70% sized tabular alumina, 15-35% calcined alumina, 2-10% hydrated alumina, 1-10% calcium aluminate cement and an acid ingredient such as 3 to 15 weight percent of an 115 percent concentration of polyphosphoric acid. The mix is prepared by a method which comprises the steps of formulating dry ingredients into a mixer, mixing the dry ingredients to a homogenous state, then adding a liquid acid ingredient to the mixture of dry ingredients, and subjecting the dry and acid ingredient mix to a high intensity mixing action for a predetermined period of time. The product is substantially dry to the touch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.