Gypsum is a wildly used industrial materials and building materials. It can be used in the cement retarder, as gypsum building products, model making, medical food additives, production of sulfuric acid paper and paint filler.
The gypsum is usually heated to 100 to 200 ° C, then some crystal water lost, which can be half water gypsum. This is a type of gas cementing material with two forms of alpha and beta, a diamond crystal, but they are different physical properties. Alpha type semi hydrated gypsum crystal is better and more solid, while beta hemihydrate gypsum is patchy and cracked crystal, crystal is very fine. The surface area is more than alpha type semi hydrated gypsum a lot. The production of Gypsum Powder Machine, alpha type semi hydrated gypsum content is less than beta, its products have higher density and strength. Usually using autoclave in the saturated steam medium steaming into the alpha hemihydrate gypsum, it is known as the high strength gypsum.
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