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Calcium carbonate is an inorganic compound commonly known as: limestone, limestone, stone powder, marble, and the like. The main component: calcite, the chemical formula is CaCO3, neutral, basically insoluble in water, soluble in hydrochloric acid. It is a common substance on the earth and exists in rocks such as vermiculite, calcite, chalk, limestone, marble, travertine, etc. It is also the main component of animal bones or shells. Calcium carbonate is an important building material and is widely used in industry. Calcium carbonate is formed by the combination of calcium ions and carbonate ions, so it is both a calcium salt and a carbonate.
Calcium carbonate can be classified into heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate, and crystalline calcium carbonate depending on the method of calcium carbonate production.
Heavy calcium carbonate (commonly known as heavy calcium)
It can be obtained by mechanically pulverizing natural calcite, limestone, chalk, shells, etc. by mechanical means (using Raymond mill or other high-pressure mill). Since the sedimentation volume of the heavy calcium carbonate is smaller than the sedimentation volume of the light calcium carbonate, it is called heavy calcium carbonate. Nature: white powder. Odorless and tasteless. There is no change in the exposed air, and the specific gravity is 2.710. The temperature of 1339 ° C. Almost insoluble in water dissolved in water containing ammonium salts or ferric oxide, insoluble in alcohol. In the case of dilute acetic acid, dilute hydrochloric acid, dilute nitric acid, it is inflated and dissolved. The heat is decomposed into calcium oxide (CaO) and carbon dioxide (CO2). Different crushing and processing equipment can produce: 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 2500 mesh, 5000 mesh heavy calcium carbonate of various particle sizes, and also due to papermaking, coatings and pigments. The special needs can also be ground to produce heavy calcium below 2μm.