Limestone is a collection of minerals, Travertine Stone the main mineral composition is calcite, followed by often contain dolomite, magnesite and other carbonate minerals, in addition to chalcedony, clay, pyrite, white iron ore, Glauconite, organic carbon, asphalt, gypsum, anhydrite and phosphate and other minerals.
Limestone is a collection of minerals, limestone chemical formula is CaCO3, the main mineral composition is calcite, followed by often contain dolomite, magnesite and other carbonate minerals, Travertine Stone in addition to chalcedony, clay, pyrite, , Water needle iron ore, glauconite, Travertine Stone organic carbon, asphalt, gypsum, anhydrite and phosphate and other minerals. The chemical composition of pure limestone is close to the theoretical composition of CaCO3, CaO accounts for 56.04%, and CO2 accounts for 43.97%.
Limestone is characterized by calcite microcrystals, crystal morphology is complex, often triangular facet and rhombohedral, light gray or gray gray compact block, granular, tuberculous and porous structure.Travertine Stone Hardness 3, the density of 2.6 to 2.9, the melting point of 825 ℃, Travertine Stone between 830 ~ 1020 ℃ decomposition of calcium oxide and carbon dioxide, case of acid generated bubble boiling, and dissolved.
Calcium carbonate is a major component of limestone, and limestone is the main raw material for the production of glass. Lime and limestone are used extensively as building materials and are an important raw material for many industries. Calcium carbonate can be processed directly into stone and fired into lime.
Limestone is the main raw material of cement, Travertine Stone accounting for 70 ~ 90% of raw materials, ingredients for the clay raw materials, siliceous materials and iron and aluminum raw materials.
Calcium carbonate is the most widely used, Travertine Stone the largest amount of inorganic mineral powder materials, calcium carbonate as a plastic powder commonly used in many other powder materials do not have the advantages, such as high whiteness, easy surface organic treatment, processing Equipment and mold wear light, good processing and processing liquidity, coupled with resource-rich, low prices, Travertine Stone a plastic processing industry preferred inorganic mineral powder material.
For rubber, calcium carbonate is second only to carbon black, Travertine Stone white carbon black, the third largest filler, with low toxicity, low price, good reinforcement and so on.
Heavy calcium carbonate is the world's first filler industry, it is not only cheap, but also can significantly reduce the cost of coating production, as one of the functional filler, Travertine Stone it can affect the coating many properties, such as changing the mechanical strength of the coating , To improve the water resistance of the coating, anti-powder and so on. It is its quality and cheap as a functional filler, Travertine Stone so in civil and industrial coatings, calcium carbonate has been the composition of the coating is one of the most important basic material.
Calcium carbonate is one of the major inorganic chemical raw materials in the paper industry. Calcium carbonate used as papermaking filler and paper coating pigment can be classified into two categories: one is natural calcium carbonate (GL) made from grinding limestone and the other is chemical Precipitation of synthetic products - precipitated calcium carbonate (PCC). The purpose of adding filler in paper is to improve paper opacity and brightness,Travertine Stone improve paper smoothness and uniformity, increase paper softness, Travertine Stone and reduce paper hygroscopicity and deformation. For printing paper, the paper after filling the ink absorption, printing performance are strengthened. A greater degree of filler, but also help reduce the cost of paper.
Limestone (limestone) is the most important type of carbonate rock, the largest reserves in nature, the most widely used in the national economy, one of the non-metallic mineral, its distribution accounts for about 35.8% of China's land area, so almost all over the country There are such deposits. China's limestone resources accounted for more than 64% of the world's total reserves, is the absolute advantage of natural resources, Travertine Stone according to the original National Building Materials Bureau geological center statistics, the national limestone distribution area of 438,000 km2 (excluding Tibet and Taiwan), about land area of 1 / 20, Anhui Province, proven reserves of limestone reserves of 9.863 billion tons, the highest for the country, followed by Henan, Shaanxi, Travertine Stone Shandong, Guangdong, Inner Mongolia, Hebei Province, 50.30 ~ 73.46 billion tons; Hunan, Guangxi, Sichuan more than 4 billion tons. In general, China's cement limestone mineral resources are abundant and widely distributed.