Process and apparatus for calcination of gypsum
- Assignee
- Knauf Gips KG
- Inventors
- Olaf Johannsmann, Rainer Schulte, Juan José Ruiz
- Jurisdiction
- WIPO (PCT)
- Filed
- 2016-11-18
- Published
- 2018-05-24
- Priority
- 2016-11-18
The invention pertains to a process for modifying gypsum, wherein a continuous feed of raw gypsum is provided; the water content of the raw gypsum is determined in the continuous feed by near infrared spectroscopy (NIR) measurement; the raw gypsum is calcined in a calcination unit at a fire rate to remove water from the raw gypsum and to obtain a continuous feed of calcined gypsum having a water content within a selected range; a water content of the calcined gypsum is determined by near infrared spectroscopy, and the fire rate is adjusted based on the water content of the raw gypsum and of the calcined gypsum. Further, the invention pertains to an apparatus for performing said process.
Process for dehydrating gypsum, wherein a continuous feed of raw gypsum is provided; the raw gypsum is calcined in a calcination unit at a fire rate to remove water from the raw gypsum and to obtain a continuous feed of calcined gypsum having a water content within a selected range; a water content of the calcined gypsum is determined by near infrared spectroscopy, and the fire rate is adjusted based on the water content of the calcined gypsum.
Further claims, drawings, prosecution history and legal status: see the official record.
- [1]WO 2018/091062 A1 — Process and apparatus for calcination of gypsum — Google Patents · 2018-05-24