Heavy calcium carbonate, referred to as heavy calcium, it is made by grinding natural carbonate minerals such as calcite, marble, and limestone. It is a commonly used powdery inorganic filler, with the advantages of high chemical purity, large inertia, not easy to chemical reaction, good thermal stability, will not decompose below 400℃, high whiteness, low oil absorption, low refractive index, soft, dry, no crystal water, low hardness&low abrasion value, non-toxic, odorless, good dispersibility, etc.
All the shape of heavy calcium carbonate is irregular, and the particle size differ greatly, and that particles have certain edges and corners, the surface is rough, the particle size distribution is wide, and the particle size is larger. The average particle size is generally 1~10μm. According to its original average particle size (d), heavy calcium carbonate is divided into: coarsely ground calcium carbonate (> 3μm), finely ground calcium carbonate (1~3μm), ultrafine calcium carbonate (0.5~1μm of heavy calcium carbonate) Powder characteristics: a. Irregular particle shape; b. Wide particle size distribution; c. Large particle size.
There are two production processes for heavy calcium carbonate, dry and wet production processes. Heavy calcium is used as a cheap inorganic filler, which is widely used in paper, plastic, rubber, coating and other industries.
At present, heavy calcium processing enterprises mostly use vertical mill, ball mill and Raymond mill. Raymond mills are suitable for processing powders below 400 acres, and ball mills are more suitable for processing ultrafine powders of 800-1250 mesh. The vertical mill is suitable for the large-scale processing of non-metallic mineral powders below 1250 mesh. Its scale and energy-saving effect are significant. While achieving the refined production of products to a large extent, it has simple operation, convenient maintenance, simple technological arrangement. It has the advantages of small occupation area, low land investment, low noise and good environmental protection. Vertical mill equipment and its technology have become one of the new developments in the current research on heavy calcium non-metallic ore powder processing technology.
Vertical mill was originally widely used in electric power, metallurgy, cement and other industries, the fineness and the particle size distribution requirements of these finished products are much lower than that of heavy calcium powder. Therefore, they are used for vertical mills for non-mineral powder grinding such as heavy calcium. Regardless of the equipment structure, grinding parts, grading device, etc., we have done systematic research and innovative design, and put forward higher requirements on the technical level and experience of equipment debugging personnel.
Application fields Through the deep processing, Heavy Calcium Carbonate can be widely used in the following industries.