Heavy calcium carbonate is a product of simple mechanical processing of calcite. It is an excellent filler and performance improver. It is widely used in plastics, rubber, paper, paint, feed, medicine, household chemicals, glass, ceramics and other fields. The demand for calcium carbonate in developed countries is very large and there are many varieties. Relatively speaking, China is still very backward in this respect and has great potential for development.

　　The product is an ideal filling material for paper, plastic, paint, paint, rubber, ceramics, pharmaceutical, glass, ink, petroleum and other industries. 1. Chemical performance index: CaCO3 content: ≥98.5%; magnesium oxide (MgO) content: ≥0.5%; iron (Fe) content: ≥0.001%; oil absorption ML/100g: 34-50%; PH (100/L Suspension): 8.5--9; hydrochloric acid insoluble matter ≤ 0.15%; 2. Physical property index: whiteness: ≥ 96%; specific gravity: 2.72; specific surface area (cm2 / g): 12000-18000; burning loss: ≤44.5%.