Device for drying and/or calcining gypsum
US8251695B2 · kind B2 · utility
3Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2008 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Dec 7, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27M2003/025
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A gypsum dryer/calciner includes a calcining space; a first pipe having an inlet connected to a source of hot gases and an outlet emerging in the calcining space; a second pipe having an inlet connected to a source of gypsum and an outlet emerging in the calcining space, the second pipe being concentric with the first pipe; and a force-feeding screw positioned at least partially in the second pipe, the screw carrying the gypsum along in the calcining space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.