EP3541765 (A1)

Process and apparatus for calcination of gypsum

(22) 18.11.2016

(43) 25.09.2019

(57) Summary of the corresponding patent WO2018091062 (A1): 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.

(71) Knauf Gips KG (DE)

Knauf Gips KG 97346 Iphofen

Related articles:

Issue 9/2018 WO 2018/091062 A1

Process and apparatus for calcination of gypsum

(22) 18.11.2016 (43) 24.05.2018 (57) 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...

more

Issue 7-8/2020 US 2020/0109086 A1

Method for manufacturing cement

(22) 28.05.2018 (43) 09.04.2020 (57) The present invention pertains to a method for manufacturing cement, wherein the gypsum is first calcined separately before being inter-grinded with the clinker so...

more

Issue 5/2021 MENDELEEV UNIVERSITY OF CHEMICAL TECHNOLOGY | BAUHAUS-UNIVERSITÄT WEIMAR

Composite gypsum binders with improved water resistance

1 Introduction In recent years the domestic industry has been in need of environmentally friendly and safe construction materials that can be produced at minimum energy consumption. These materials...

more

Issue 11/2014 GEBR. PFEIFFER SE

Grinding and calcining of gypsum with Pfeiffer grinding plants

When gypsum is calcined in an atmosphere saturated with water vapour at an overpressure of several bars, a-hemihydrate is formed (Fig. 1). The outstanding feature of this plaster is a relatively...

more

Issue 4/2019 US 2019/0016633 A1

Calcined gypsum treatment device and calcined gypsum treatment method

(22) 31.01.2017 (43) 17.01.2019 (57) A calcined gypsum treatment apparatus has an agitating type of cooler provided with a cooling region for cooling the calcined gypsum, and a moisture supplying...

more