When heating and calcining the dihydrate gypsum, the dihydrate gypsum will be decomposed, we can produce the semi-hydrated gypsum (CaSO4?/2H2O) , that is building gypsum, also called plaster of paris. Because of the different temperature and pressure when decompose the gypsum, we can get different product, a-type gypsum and b-type gypsum. a-type gypsum is high-strength gypsum,b-type gypsum is building gypsum. They are the same technology using mechanisation producing building gypsum. The process can be divided into three system, crashing system, calcining system and milling system.
Wooden case & plaste
