Fluorite is a very beautiful gem, so what is it used for? Next, Xiaobian will introduce the use of fluorite for everyone. The composition of fluorite is calcium fluoride, also known as fluorspar, vermiculite, etc. It is often purple, green, and light blue due to various rare elements. The colorless and transparent fluorite is rare and precious. The crystal form has a cube, an octahedron or a rhombohedral dodecahedron. If you put a fluorite under a fluorescent fluorescent light, it will emit beautiful fluorescence. The use of fluorite and its processed products has been involved in more than 30 industrial sectors. Adding fluorite to steelmaking can increase the fluidity of the melt and remove harmful impurities such as sulfur and phosphorus. Half of the world's fluorite production is used to make hydrofluoric acid, which in turn develops cryolite for use in the aluminum industry. The coolant (Freon) in the refrigerator should use fluorite; in 1986, the first generation of artificial blood in China should also use fluorite. In recent years, scientists are developing fluoride glass, which is likely to be a new type of optical fiber communication material that can pass through the 20,000-kilometer wide Pacific Ocean without a re-issuing station. The use of fluorite is very extensive, and with the advancement of science and technology, the application prospects are becoming more and more broad. At present, it is mainly used in the three major industries of metallurgy, chemical industry and building materials, followed by light industry, optics, engraving and national defense industry. Therefore, according to the requirements of use, at present, there are four major series of fluorite mineral products in China, namely fluorite lump ore, fluorite (fluorine) concentrate, fluorite powder ore and optical and engraved fluorite. Decorative use of fluorite More than 7,000 years ago, China's Hemudu people used fluorite for decoration. Because of its large products and rich colors, fluorite is often made into various kinds of accessories, but its hardness is low. Do not wear natural crystals when wearing, crystal will scratch fluorite! The fluorite collected directly from the mine has a certain amount of radiation and cannot be placed in the bedroom! Industrial use of fluorite Half of the world's fluorite production is used to make hydrofluoric acid, which in turn develops cryolite for use in the aluminum industry. Fluorite is used as a coolant in the refrigerator (Freon); in 1986, the first generation of artificial blood in China also used fluorite. Nowadays, scientists are developing fluoride glass, which is likely to be a new type of optical fiber communication material that can pass through the 20,000-kilometer wide Pacific Ocean without a re-issuing station. The non-stick pan used at home is a layer of fluoroplastic coated on the bottom of the pan. Chemical industrial use of fluorite Another important use of fluorite is in the production of hydrofluoric acid. Hydrofluoric acid is produced by reacting acid grade fluorite (fluorite concentrate) with sulfuric acid in a heating furnace or tank, and is divided into anhydrous hydrofluoric acid and hydrofluoric acid, which are both colorless liquids. , volatile, strong irritating odor and strong corrosive. It is a key raw material for the production of various organic and inorganic fluorides and fluorine. In the aluminum industry, hydrofluoric acid is used to produce aluminum fluoride, artificial cryolite, sodium fluoride and magnesium fluoride. In the aerospace industry, hydrofluoric acid is mainly used to produce jet liquid propellants and missile jet fuel propellants. In the atomic energy industry, hydrofluoric acid is mainly used to make UF4, which is then fluorinated to form UF6, and 235U is separated by gas diffusion or gas centrifugation. Hydrofluoric acid is the basic raw material of organic fluorine chemical. It interacts with chloroform and carbon tetrachloride to produce fluorinated chlorocarbons and fluorocarbons with low toxicity and high chemical stability. It is used as a refrigerant and aerosol. Agents, intermediates of solvent polymers and fluorocarbon resins and elastomers. Hydrofluoric acid is reacted with carbon tetrachloride to form Freon (usually indicated by F). In addition to being used as a refrigerant, Freon is also widely used in sprays, fire extinguishing agents, fluoroplastics, and the like. In medicine, fluoroorganic compounds can also produce fluorochemical anticancer drugs, fluorocortisone, fluorocarbon artificial blood, artificial heart and bone. In the inorganic fluorination industry, insecticides, preservatives, protectants, additives, fluxes and antioxidants can be produced. The chemical industry has high requirements for the quality of fluorite products. Generally, CaF2 content is required to be 93% to 98%. Silica and calcium carbonate are harmful impurities and must be strictly limited. Today, the quality requirements of China's fluorescein (fluorine) concentrate are in accordance with the People's Republic of China GB5690-85 "Fluorite Concentrate". Use of fluorite building materials industry Fluorite is also widely used in glass, ceramics, cement and other building materials industries, and its dosage is the second in China. In the glass industry, fluorite is added as a fluxing agent and an opacifier to promote the melting of glass raw materials. Different glass, fluorite is added in different amounts. Ordinary glass plate, fluorite is added in an amount of 1% of the charge; alkaline glass ball, fluorite is added in an amount of 1% to 2%; oxidized glass and fluorite are added in 3%; white, cream, colored glass In the production process, fluorite is used as a co-solvent as an auxiliary agent, and the amount of fluorite is 10% to 20% of the charge. The glass industry has strict requirements on the quality of fluorite, requiring CaF2>80%; Fe2O3<0.2%. In cement production, fluorite is added as a mineralizer. Fluorite can reduce the sintering temperature of the charge, reduce fuel consumption, and at the same time enhance the liquid viscosity of the clinker during sintering and promote the formation of tricalcium silicate. In cement production, the amount of fluorite added is generally from 4% to 5% to 0.8% to 1%. The quality of fluorite in the cement industry is not strict. Generally, the CaF2 content is above 40%, and the impurity content requirements are not specified. In the ceramic industry, fluorite is mainly used as enamel, which can help color and flux during the production of enamel. For example, after adding fluorite to the red enamel, the color of the fluorite in the ceramic enamel is generally about 10% to 20%. Also involved in the manufacture of enamel products. Fluorite is also used in enamel industry and cast stone production with 3% to 10% and 3%, respectively. In the building materials industry, the quality requirements for fluorite are different due to different uses. Today, the quality requirements of fluorite used in the building materials industry in China are specified in the National Standard GB19321-88 "Fluorite Powder Mine" of the People's Republic of China. We have summarized all the uses of fluorite from the decorative use of fluorite, industrial use, chemical industry use and the use of building materials industry. If more fluorite is used, please visit our website.
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