1. Powder characteristics

The heavy calcium carbonate powders are polydisperse and have a haphazard form. The distribution is wide, the average particle size is typically 5–10 m, and the particle size is huge. Insoluble in alcohol, soluble in water containing ferric oxide or ammonium ions, and practically insoluble in plain water. It is inflated and dissolved in the cases of diluted acetic acid, diluted hydrochloric acid, and diluted nitric acid. Calcium oxide (CaO) and carbon dioxide are formed when the heat is broken down (CO2).

Light calcium carbonate particles come in a variety of shapes, including spindle, cuboid, needle, chain, spherical, sheet, and square prism shapes. They are regularly formed and can be thought of as a monodisperse powder. By adjusting the reaction conditions, calcium carbonate can be formed into these various shapes. The distribution is narrow, the average particle size is typically 1-3 m, and the particle size is small. It emits carbon dioxide in an exothermic reaction and is rarely soluble in water, alcohol, or acid. Additionally soluble in ammonium chloride solution, stable in the air, and has a negligible capacity to absorb moisture

2. Production process

Heavy calcium carbonate (heavy calcium) is obtained by directly pulverizing natural limestone, calcite, etc. by a mechanical method (grinding equipment like Raymond mill, Ultrafine mill etc).

The light calcium carbonate adopts the carbonization method, and the limestone and the white coal are mixed in a certain ratio, and then the high-temperature calcination, water digestion, carbon dioxide carbonization, centrifugal dehydration, drying, cooling, pulverization, and sieving are obtained.

3. Use

Heavy calcium carbonate is widely used, and it can be filled with rubber to obtain higher tensile strength, tear strength and wear resistance than pure rubber sulfide. It has a significant impact on the dimensional stability of plastic products, may improve the hardness of the products, and can also enhance the gloss and flatness of the surfaces. It can act as a structural component in plastic products. The aqueous coating industry uses it to manufacture coatings that don't settle and are simple to disseminate. The heavy calcium carbonate for paper making can guarantee the strength and whiteness of the paper, and the cost is low. Heavy calcium carbonate plays an important role in concrete in the construction industry and can increase the toughness and strength of the product. It is used in the floor drilling industry to increase the whiteness and tension of the product, improve the toughness of the product, and reduce production costs.

Light calcium carbonate can be used as a filler in the rubber, plastics, paper, paint, and ink industries, and is widely used in the production of organic synthesis, metallurgy, glass, and asbestos. Additionally, it can be used as a grease anti-adhesive, a dairy feed filler, a neutralizer for industrial wastewater, an antacid for gastric and duodenal ulcer illness, an antidote for acidosis, an SO2 eliminator for SO2-containing waste gas, and an antidote for acidosis. Additionally, it can be utilized as a raw ingredient in toothpaste, toothpowder, and other cosmetic products.