Grinding and calcining of gypsum with Pfeiffer grinding ...
Grinding and calcining of gypsum with Pfeiffer grinding plants. GPSE. 1 Two different modifications of the hemihydrate CaSO 4 x ½ H 2 ... 1 The specific thermal energy requirement is about 20 % higher than when the gypsum is calcined directly in the gypsum calcining mill. GPSE. GPSE. 6 The crystal water content is reduced by a rising exhaust ...