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US20110033351 SYSTEM AND METHOD FOR CALCINING GYPSUM  
A system (100) for calcining natural gypsum, synthetic gypsum (112) or a combination thereof, the system including: a mill (114) for grinding and drying natural gypsum, synthetic gypsum (112) or a...
US20090208392 PROCESS FOR PRODUCING ALPHA-HEMIHYDRATE GYPSUM  
A process for producing alpha-hemihydrate gypsum from dihydrate gypsum includes feeding a slurry comprising the dihydrate gypsum and water into a heating tube, heating the heating tube at a...
US20170121183 Method For Reducing Elemental Sulfur In Gypsum Products  
Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be...
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