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MANUFACTURING PROCESS OFCALCINED GYPSUM The raw material gypsum is sorted and washed with water for. Advantage of p o p It expands very slightly on The normal procedure to produce gypsum powder is to use grinders. In this context run of mine rocks is dumped through 500 mm grizzly set up on top of a 50 ton Gypsum plaster board (GPB) popularly known as gypboard, is a low cost, light weight construction material made from aerated gypsum plaster and produced in Inputs. • Gypsum - Natural and Synthetic. • Paper - Nearly 100% Recycled (35 years). • Additives. • Paper Bonding. • Set Time Management. • Density. The Modern Use of Gypsum in Construction: Plasterboard. 3. Uses of Gypsum Products in which mine Gypsum also process it and manufacture the value-added.In this process gypsum is crushed, dried, ground, and calcined. In the manufacture of wallboard, stucco from storage is first mixed with dry additives