Continuous calcining of gypsum
US4101630A · kind A · utility
5Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jul 14, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B11/028
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A continuous calciner, particularly advantageous in converting gypsum to plaster, with two coaxial cylindrical walls, provides for heating air within the inner cylinder and then directing the air, for conveying and heating fine particles, along a spiral path, between the walls of the two coaxial cylinders, extending from one end of the calciner to an exit at the second end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.