1- Classification and use of calcium carbonate

     Calcium carbonate is an important mineral product, widely used in plastics, rubber, paper, inks, paints, building materials and so on. Processing industry for the production of these materials mostly use filler in the process. Calcium carbonate is mainly of two kinds; one is made from natural limestone pulverized by mechanical pulverization with different fineness of calcium carbonate, which is called heavy calcium carbonate, with fine natural limestone quality. The second is through the selection of calcined limestone that has to be decomposed into calcium oxide (CaO), the addition of water (H2O) reacts with calcium oxide to form calcium hydroxide (Ca (OH)2), and then with carbon dioxide, carbonic acid is formed after precipitation known as light calcium carbonate. In addition to the mass of calcium carbonate light calcium carbonate from natural taste decisions, the conditions and the classification of chemical reactions such as the fineness is also very important factors. Current industrial productions of heavy calcium carbonate are mainly of two kinds, one kind is dry and the other is wet. Dry products can be widely used in rubber, plastics, paint and other industries. The wet process is used in the paper production industry, and the general product slurry product is sold to paper mills.

3- The performance and technical parameters of calcium carbonate