gypsum gypsum manufacturing process
Gypsum block Wikipedia. Manufacture. A gypsum block is made of gypsum plaster and water. The manufacturing process is automated at production plants where raw gypsum CaSO 4 1832H 2 O is ground and dried, then heated to remove threequarters of the bound water and thus transformed into calcium sulfate hemihydrate CaSO 4 183189H 2 O, also known as gypsum plaster, stucco, calcined gypsum .