Extensive use of fluorite, with scientific and technological advances, more and more broad application prospects. Mainly used in metallurgy, chemicals and building materials three industries, secondly light, optics, sculpture and defense industries. Therefore, depending on the application requirements, the current Chinese fluorite minerals mainly include four series varieties, namely fluorite ore, firefly (fluorine) Stone concentrates, fluorite ore fines and optical, carving fluorite.
Metallurgical industry:
Fluorite has a refractory substance can reduce the melting point of the slag to promote flow separation of the slag and metal well, in the smelting process desulfurization and dephosphorization, reinforced metal can be calcined and tensile strength characteristics. Therefore, it is widely used as a flux and alloy steel smelting production of iron and non-ferrous smelting process. General requirements for fluorite ore smelting calcium fluoride content greater than 65%, and the main impurities silica also has certain requirements, sulfur and phosphorus are strictly limited. Sulfur and phosphorus content of not more than 0.3% and 0.08%. Quality of their products in accordance with the national standard GB8216-87 "fluorite ore."
Chemical industry:
Another important use is the production of fluorite hydrofluoric acid. Hydrofluoric acid is an acid grade fluorspar (fluorite concentrate) with sulfuric acid in the reaction tank furnace or arising out of, sub anhydrous hydrofluoric acid, hydrofluoric acid and water, and they are a colorless liquid volatile, there is a strong pungent odor and a strong corrosive. It is the production of organic and inorganic fluoride and fluorine key raw materials.
In the aluminum industry, hydrofluoric acid is used to produce aluminum fluoride, cryolite, sodium fluoride and magnesium fluoride.
In the aerospace industry, the hydrofluoric acid is mainly used to produce jets of liquid propellant missile jet fuel propellant. In the nuclear industry, hydrofluoric acid is mainly used to manufacture UF4, then by fluorination UF6, or gas through the gas diffusion centrifugation 235U.
Hydrofluoric acid is an organic fluorine chemical basic material, which interact with the chloroform and carbon tetrachloride, producing toxicity, high chemical stability of fluorinated chlorinated hydrocarbons and fluorocarbons, as refrigerants, aerosol air promotion agents, solvents and intermediates polymeric fluorocarbon resins and elastomers.
Hydrofluoric acid made by reacting with carbon tetrachloride Freon (usually expressed as F). Freon as a refrigerant in addition to, but also widely used in sprays, fire extinguishing agents, fluorine plastics.
In medicine, fluorine fluorine-containing organic compounds can also be anti-cancer drugs, cortisone fluorine-containing fluorocarbon artificial blood.
The inorganic fluoride industry, can be produced pesticides, preservatives, protective agent, additives, and antioxidants such as flux.
Fluorite chemical industry products on the high quality requirements, general requirements CaF2 content of 93% to 98%, silica and calcium carbonate are harmful impurities must be strictly limited. At present, China firefly (fluorine) Stone concentrates quality requirements under PRC GB5690-85 "Concentrate"
Building Materials Industry:
Fluorite is also widely used in glass, ceramics, cement and other building materials industry, the amount of the first two in China accounted for.
In the glass industry, fluorite as a flux, opacifiers added, it can promote the melting glass material. Different glass, fluorite adding different amounts. Ordinary glass sheet, fluorite adding 1% of the amount of charge; alkali glass balls, fluorite added in an amount of 1% to 2%; oxide glass, fluorite added in an amount of 3%; white, milky color, colored glass production process, fluorite as a cosolvent in addition, also as opacifiers, adding an amount of charge of 10% to 20%. Fluorite glass industry for more stringent quality requirements, requiring CaF2> 80%; Fe2O3 <0. 2%.
In cement production, fluorite as a mineralizing agent is added. Fluorite can lower the sintering temperature of the charge, reduced fuel consumption, while enhancing the sintering clinker liquidus viscosity, promote the formation of tricalcium silicate. In cement production, fluorite In general, the added amount of 4% to from 5 to 0.8% to 1%. Cement Industry strict requirements on quality fluorite, CaF2 content in general can be more than 40% of the impurity content requirements are not as specific provisions.
In the ceramic industry, mainly for fluorite enamel, the enamel can play to help the production process colors and fluxing action. If the red enamel after adding fluorspar to bright light color in the ceramic enamel fluorite production generally added in an amount from about 10% to 20%.
Fluorite and cast stone is also used in the production of ceramic industry, which were added in an amount of 3% to 10% and 3%.
More about:
Fluorspar 75 supplier
From:
Metal materials
