Method and apparatus for continuously calcining gypsum
US6083465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B11/028
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An apparatus for continuously calcining gypsum includes a flash calcining impact mill, a feed bin adjacent the impact mill for holding gypsum, and a gypsum feed control mechanism for supplying gypsum from the feed bin to the impact mill at a substantially constant rate. A method for continuously producing calcined gypsum includes the steps of providing a flash calcining impact mill and providing a feed bin adjacent the impact mill, the feed bin containing gypsum to be calcined. A gypsum feed control mechanism is provided for supplying gypsum from the feed bin to the impact mill. Gypsum is supplied from the feed bin to the impact mill at a substantially constant rate, and the impact mill is operated to dry, grind, and calcine the gypsum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.