Pulveriser, Microniser with Ball Mill, China 21 Roller mill, Raymond 3/4 Roller mill are various machines used for mfr Calcite. China 21 Roller Mill and Ball Mill with microniser makes finer than 500 mesh material. 3/4 Roller Mill makes coarser than 500 mesh particle size. Rajasthan Super Fillers Private Limited, Rajasthan, India