Heavy calcium carbonate is abbreviated as heavy calcium. It uses high-quality limestone as raw material is processed into white powder by a lime mill. Its main component is CaCO3. Heavy calcium has the characteristics of high whiteness, good purity, soft hue stable chemical composition. Heavy calcium is usually used as a filler, widely used in daily chemical industries such as artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, construction supplies, food, medicine, textiles, feed, toothpaste, etc. Increase the volume of products reduce production costs. Used in rubber, it can increase the volume of rubber, improve the processability of rubber, play a role of semi-reinforcement reinforcement, can adjust the hardness of rubber.