Limestone, also known as calcium carbonate, is a compound whose chemical formula is CaCO₃. CAS 471-34-1. It is a common material on earth and can be found in rocks. The main ingredients of animal dorsal shells and snails shells. It exists in nature with calcite and aragonite two minerals. Calcite is a triangular system, hexagonal crystal, pure calcite colorless transparent, generally white, containing 56% CaO, 44% CO₂, density of 2.715 g / cm³, Mohr hardness of 3, the property of brittle. Aragonite belongs to the orthogonal strain, rhombic crystal, gray or white, density of 2.94 g/cm³, Mohr hardness of 3.5-4, dense nature. The physical properties of limestone are very important for the crystallization of calcite in China. Dense limestone exhibits a low porosity and fine grain structure with high strength. The density of limestone is about 2.65-2.80 g/cm³, dolomitic limestone is 2.70-2.90 g/cm³ and dolomite is 2.85-2.95 g/cm³. Bulk density depends on porosity.

Limestone Processing technology

The limestone crushing production line is an important production link in lime burning production line and cement production line. Cement plant can break and break large pieces of limestone through Zhengzhou Vanguard limestone crushing production line equipment, so as to meet the national standards and customer requirements. Easy to use, the particle size of broken products is more uniform, long service life, low noise, small dust, easy maintenance and repair, low vibration and so on. The concrete work flow is: the material is transported from the vibrating feeder to the jaw crusher, the material is crushed by a conveyor into the counter-breaking or cone-breaking for crushing, after crushing, the material enters the vibrating screen for screening, the finished material is sent out by the conveyor, the unqualified material is transported back to the counter-breaking or cone-breaking for re-breaking. Secondary breakage. With the entry of foreign high-grade calcium carbonate materials and fillers into the Chinese market, it has promoted the domestic technological progress, accelerated the rapid growth of deep-processed calcium carbonate varieties in China, and developed rapidly in the direction of diversification, specialization and refinement, and expanded more application fields. At present, Vanguard has successfully installed a complete set of crusher production lines for many domestic limestone production line investors, providing protection for customers to obtain economic benefits, is the best choice of crusher equipment buyers.
Lime Shi Ke is widely used as building material and is also an important raw material for many industries. Limestone can be directly processed into stone and fired into quicklime. Lime has quicklime and hydrated lime. The main component of quicklime is CaO, which is generally lump-like, pure white, and light gray or yellowish when it contains impurities. Quick lime absorbs moisture or adds water to become eliminating lime, eliminating lime is also called ripe lime, its main component is Ca (OH) 2. Matured lime is blended into lime slurry, lime gypsum, lime mortar, etc., and used as coating materials and tile binder. Cement is made by mixing limestone and clay and calcined at high temperature. The glass is made of limestone, quartz sand and soda ash. Iron is used as a flux to remove gangue. Steel making lime is used as slag making material to remove harmful impurities such as sulphur and phosphorus. Calcium carbide (mainly CaC2) is produced by the reaction of quicklime and coke in an electric furnace. Soda ash is prepared by multi-step reaction of limestone, salt, ammonia and other raw materials. Caustic soda (caustic method) is prepared by reaction of slaked lime and soda ash. Bleaching is made by using pure hydrated lime and chlorine. Calcium chloride, calcium nitrate, calcium sulfite and other important calcium salts are made by chemical processing of limestone. Hydrated lime can remove the temporary hardness of water and is used as a softener for hard water. Calcium carbonate powder is made from limestone and used as filler for rubber, plastics, paper, toothpaste and cosmetics. Alkali lime made from lime and caustic soda and used as absorbent for carbon dioxide. Quicklime is used as desiccant and disinfectant. In agriculture, lime, sulfur, Bordeaux and other pesticides are prepared with quicklime. The application of ripe lime in the soil can neutralize the acidity of the soil, improve the structure of the soil and supply the calcium needed by plants. Using lime slurry to brush the trunk can protect trees.

Application fields Through the deep processing, Limestone can be widely used in the following industries.

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