A vibrating feeder feed the raw gypsum material into the processing plant. The vibrating feeder consists of a conveyor belt that shakes to evenly distribute the gypsum rock onto the conveyor surface. The crusher machine pulverizes the rock into pieces measuring 2 inches or less.
The small gypsum rocks enter a drying receptacle. The receptacle spins and heats the rocks evenly. The rock dryer transforms the gypsum into what is called a "hemi-hydrate."
A machine with rotating rollers crushes the gypsum rock. Plaster of Paris is composed of this hemi-hydrate crushed material.
The calcination process heats the gypsum to high temperatures. This transforms the hemi-hydrate into an anhydrite. The anhydrite form of gypsum provides further strength in plaster usage. In some processing, the manufacturer adds water to reshape the gypsum into a desired form.
Small Gypsum Processing Plant
Gypsum processing plants vary widely in scale and level of technology. They range from plants producing one or two tonnes per day using low-cost manual technologies, to plants of a thousand tonnes per day that are highly mechanized and capable of producing different types and grades of gypsum plaster or plaster boards. There are many small scale gypsum production plant operated.