By Donald W. Olson - USGS Mineral Resources Program
GYPSUM—2001 35.1 GYPSUM By Donald W. Olson,If this powder is then mixed with water to form a paste or slurry, then it will dry and set rock hard. The chemically,Companies with the most calcining plants were U.S. Gypsum with 21; National Gypsum, 18; Georgia-Pacific, 14; and Celotex, 4. These companies produced more than 79% ofGrinding and calcining of gypsum with Pfeiffer grinding plants,level in the gypsum calcining mill, the gypsum is simultaneously calcined.,Grinding and calcining of gypsum with Pfeiffer grinding plants TEXT Eckhard Sander, Gebr. Pfeiffer SE, Kaiserslautern/Germany,x ½ H 2 O are obtained. GPSE Gypsum powder raw gypsum calcium sulphate dihydrate CaSO 4 · 2H 2 O a) natural gypsum b) synthetic gypsum,Gypsum - Claudius Peters,Gips AD gypsum processing plant, Bulgaria. Standing as a true leader within the gypsum industry, Claudius Peters is able to,n Tailor-made gypsum calcining systems n Natural gypsum & synthetic gypsum n Post-calcining treatment n Stucco handling and packaging n Raw material preparation 3.