Calcium Carbonate Powder Food Grade FCC by Duda Energy Chemical Formula CaCO3Powder Particle Size 325 Mesh 44 Micron Some of the Many Common Uses Dietary supplement for calcium Common Antacid Filler material for a wide variety of products (Toothpaste, paper.Calcite and barite after ultrafine grinding (1250mesh) are two important materials of papermaking industry. Calcite which is also called calcium carbonate has been used as popular filler replacing usual talc and kaolin. Similarly, barite powder is also widely used as filler in papermaking. Equipment. Raw material Calcite and barite.