The calcite material is fed to a jaw crusher and crushed into the desired particle size. It is lifted to a storage hopper and then sent by a vibrating feeder evenly, quantitatively and continuously to a calcite grinding mill. After grinding is done, the calcite is blown away by wind and then graded in a powder separator in line with the powder fineness. It will flow through pipes into a big cyclone collector, and then separated using a discharge valve to form the final calcite powder product.