TSP "is calcite, a" heavy calcium carbonate "for short, the main ingredient is calcium carbonate, calcium carbonate is also referred to as" TSP ", usually used as a filler, widely used man-made floor tiles, rubber, plastics, paper, coatings, paints, inks, cables, building supplies, food, pharmaceutical, textile, feed, toothpaste and other household chemical industry, as a filler play volume increase of products, reduce production costs. [Introduction] calcium carbonate ( Calcium Carbonate) is an important and widely used inorganic salts. heavy calcium carbonate (Heavy Calcium Carbonate), also known as ground calcium carbonate (Ground Calcium Carbonate, referred to as the United States, said GCC Kotamite), is directly mechanically crushed natural calcite , limestone, chalk, shells, etc. in the system. Because of its sedimentation volume (1.1-1.9mL / g / g) than chemically produced calcium carbonate sedimentation volume (2.4-2.8mL / g) is small, so it is called heavy calcium carbonate. physicochemical properties of the chemical formula of calcium carbonate caco3, its crystals are mainly tripartite complex partial three faces of calcite and orthorhombic aragonite crystal class category, at normal temperature and pressure, is stable calcite, aragonite is quasi-stable, mainly calcite mainly at atmospheric pressure, calcite was heated to 898 ℃, aragonite was heated to 825 ℃, will be decomposed into calcium oxide and carbon dioxide; calcium carbonate and all the strong acid react to produce water and corresponding calcium salt (such as calcium chloride CaCl2), and release of carbon dioxide; at room temperature (25 ℃), the product of the concentration of calcium carbonate in water of 8. 7 × 1029, solubility of 0. 0014, pH value of the aqueous solution of calcium carbonate to 9. 5 ~ 10. 2, pH value of air-saturated aqueous solution of calcium carbonate 8.0 ~ 8.6. carbonate-toxic, odorless, non-irritating, usually white, the relative density of 2.7 to 2 . 9 Mohs hardness of calcite is 3, aragonite is 3.5 to 4 has three sets of calcite rhombohedron complete cleavage, cleavage has also aragonite calcium carbonate sedimentation volume: 1.2 to 1. 9ml / g, specific surface area of ??1m2 / g or so; heavy calcium carbonate particles due to the large, smooth surface, small specific surface area, so the low oil absorption value of about 48ml / 100g producing heavy calcium carbonate production process there. two kinds of dry production process: First, hand-picked from the quarry shipped calcite, limestone, chalk, shells, etc., to remove gangue; then coarse crusher for crushing limestone, then Raymond (Swing ) Mill obtain fine limestone powder, and finally sorting machine for milling grading meet the size requirements of the powder as product packaging and storage, otherwise it returns again to the wet milling mill production process: first dry powder The suspension was put into further pulverizing mill, dehydration, after drying to obtain superfine heavy calcium carbonate calcium carbonate particle shape shapes are irregular, large differences in particle size, and particle a certain angular, rough surface, the particle size distribution is wide, a larger particle size, the average particle diameter is generally 1 ~ 10μm. Heavy calcium carbonate in its original average particle size (d) is divided into: coarse calcium carbonate (> 3μm), finely ground calcium carbonate (1 ~ 3μm), ultra-fine calcium carbonate (0. 5 ~ 1μm heavy calcium carbonate . Powder characteristics: a particle of irregular shape; b wide particle size distribution; c diameter larger field of application of the current, calcium carbonate has been widely used in paper, plastics, plastic film, chemical fiber, rubber, adhesives, sealants... agents, household chemicals, cosmetics, building materials, coatings, paints, inks, putty, sealing wax, putty, carpet layer packaging, pharmaceutical, food (such as chewing gum, chocolate), feed, and its role are: to increase the volume of products, reduce costs , improve the processing properties (such as adjusting the viscosity, rheological properties, curing properties), improved dimensional stability, a reinforcing or semi-reinforcing and improve printing performance, improved physical properties (such as heat resistance, matting properties, abrasion resistance, resistance . flammable, whiteness, gloss) and other high whiteness, stable performance Note: Powder Co., Ltd. Jiangxi Branch source can produce different brightness according to customer requirements, the fineness of the product.