The making process of calcite powder can be divided into five stages, including the conveying, crushing, partial drying, milling and calcination. Upon removal, trucks transport calcite stones to the processing plant.
A vibrating feeder moves the raw calcite stones into the processing plant. The vibrating feeder consists of a conveyor belt that shakes to evenly distribute the calcite rock onto the conveyor surface. The conveyor feeds the rock into a jaw crusher, which can pulverize the rock into pieces measuring 2 inches or less. After crushing, small calcite rocks enter a drying receptacle. The receptacle spins and heats the rocks evenly.
The rock dryer transforms the calcite into what is called a "hemi-hydrate." And then, grinding machine deal with calcite particles, and plaster of Paris is composed of this hemi-hydrate crushed material. The final mining stage is calcination, which heats the calcite to high temperatures. This transforms the hemi-hydrate into an anhydrite. The anhydrite form of calcite provides further strength in plaster usage. Usually, the manufacturer adds water to reshape the calcite into a desired form.
Calcite Powder Making Machinery—LM vertical mill
LM vertical mill is used as the calcite powder making machinery. LM series vertical mill is the newest grinding machine, which integrates the advanced international technology and years of rich experience. It is the ideal equipment that integrates crushing, drying, grinding and grading conveyor all together. So, calcite powder producers need not buy another drier to combine with the calcite mill, which can significantly reduce the mining investment.