Preparation of reactive beta-dicalcium silicate
US4314980A · kind A · utility
10Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to the preparation of fine particles of reactive beta-dicalcium silicate by means of a solid state process which comprises firing a mixture of calcium sulfate, silica and a reducing additive selected from the group consisting of calcium sulfide, carbon, carbon monoxide, methane and hydrogen, at a temperature of about 850.degree.-1000.degree. C. A carrier gas such as nitrogen or carbon dioxide may also be added, if desired. A high concentration of sulfur dioxide is a by-product of this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.