Sep 08, 2009 The best way to produce your calcium carbonate is to use ball mill with air classifier. OME Malaysia Company has for mission the engineering of-the art ultra-fine classifying, grinding and coating of calcium carbonate. We are dedicated to produce air classifiers, and ball-mills. We also have expertise in calcium carbonate compounds. 2. 21/24/28/32 roller ultrafine grinding mill is used to produce 74-5 (150-3000 mesh) products, D975m, D503m, high fine powder content, good powder quality 3. Ultra-fine vertical mill is suitable for the production of 400-3000 mesh calcium carbonate, D974m, D502m, characterized by high whiteness, good sphericity and high efficiency. 4.