Process for producing a calcia clinker
US4366257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1981 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | Jun 3, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/057
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A calcia clinker having an excellent resistance to slaking and an enhanced modulus of rupture at elevated temperatures is produced by a process comprising the steps of: (1) calcining a lime material at a temperature of 800.degree. to 1300.degree. C. to prepare a calcia; (2) providing an admixture, in the form of fine particles having a specific surface area of 5000 cm.sup.2 /g or more, of the calcia with an additive comprising (A) 0.5 to 3%, in terms of oxide and based on the weight of CaO in the calcia, of at least one inorganic compound of an element selected from the group consisting of titanium, aluminum and silicon and (B) 0.5 to 2.0%, based on the weight of CaO in the calcia, of calcium fluoride; and sintering the above-mentioned compound (A), and; (3) sintering the admixture at a temperature of 1200.degree. to 1650.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.