The application of limestone.

Calcium carbonate is the main component of limestone, which is the main raw material for the production of glass. Lime and limestone are used in large quantities as building materials and are important raw materials for many industries. Calcium carbonate can be directly processed into stone and fired into quicklime. Lime is quick lime and hydrated lime. The main component of lime is CaO, which is generally blocky, pure white, and light gray or light yellow when containing impurities. Quicklime absorbs moisture or adds water to become slaked lime, slaked lime is also called hydrated lime, its main component is Ca(OH)2. The hydrated lime is blended into lime paste, lime plaster, lime mortar, etc., which is used as coating materials and adhesives for bricks and tiles. Cement is a mixture of limestone and clay, which is calcined at high temperatures. 

Glass is made by mixing limestone, quartz sand, soda ash (sodium carbonate), etc., and melting at high temperature. Iron making uses limestone as a flux to remove gangue. In steelmaking, quicklime is used as slag-making material to remove harmful impurities such as sulfur and phosphorus. Calcium carbide (mainly CaC2) is produced by the reaction of quicklime with coke in an electric furnace. Soda ash is made from limestone, salt, ammonia and other raw materials through a multi-step reaction (Solvay process). Caustic soda is produced by the reaction of slaked lime and soda ash (causticizing process). 

Bleached by the reaction of pure slaked lime with chlorine gas. The important calcium salts such as calcium chloride, calcium nitrate and calcium sulfite are prepared by chemical processing of limestone. Slaked lime can remove the temporary hardness of water and is used as a hard water softener. The lime stone is burnt and processed into a pure powdered calcium carbonate, which is used as a filler for rubber, plastics, paper, toothpaste, cosmetics and so on. Alkaline lime made of lime and caustic soda, used as an absorber of carbon dioxide. Quicklime is used as a desiccant and disinfectant. In agriculture, lime sulfur mixture, Bordeaux liquid and other pesticides are prepared with quick lime. The application of hydrated lime in the soil can neutralize the acidity of the soil, improve the structure of the soil, and supply the calcium required by the plants. Brush the trunk with lime paste to protect the tree.

Single fly powder: Used for the production of anhydrous calcium chloride, is an auxiliary raw material for the production of sodium dichromate. The main raw materials for glass and cement production. In addition, it is also used for building materials and poultry feed.

Double fly powder: raw materials for the production of anhydrous calcium chloride and glass, white fillers for rubber and paint, and building materials.

Sanfei powder: Used as filler for plastics, paint putty, paint, plywood and paint.

Sifei powder: used as wire insulation filler, rubber molding products and asphalt felt filler.

Calcium carbonate is an important building material. The white and pure calcium carbonate rock is called white jade, which can be directly used to make decorative stone columns or crafts; Calcium carbonate, which contains impurities and has a beautiful pattern, is called marble, which is used to make the exterior and inner walls of buildings or to lay the floor; Dense calcium carbonate rock (limestone) can also be directly used for building houses, but the main use of limestone is the production of cement. The white stone containing more than 90% CaCO3 is crushed, graded and separated by Ramon mill or other high pressure mill.