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Purity requirements of fluorspar in different industries

Views: 79     Author: SEPPE     Publish Time: 2021-02-19      Origin: SEPPE Technologies

Metallurgical Industry

Fluorite can lower the melting point of refractory impurities, promote flow, and enhance the forgeability and other characteristics of metals. Therefore, it is widely used in metallurgy. Fluorite ore for metallurgy generally requires a content of more than 65%, and also has certain requirements for main impurities, and has strict restrictions on phosphorus. The content of sulfur and phosphorus shall not be higher than 0.3% and 0.08% respectively.

Chemical Industry

Another important use of fluorite is to produce hydrofluoric acid. It uses acid-grade fluorite (fluorite concentrate), which is divided into anhydrous hydrofluoric acid and hydrofluoric acid. They are both a colorless liquid, volatile and Strong pungent smell and strong. It is the key raw material for the production of various organic and inorganic and fluorine elements.

In the aluminum industry, hydrofluoric acid is used to produce artificial cryolite and sodium fluoride.

In the aviation and aerospace industries, hydrofluoric acid is mainly used to produce jet liquids and jet propellants.

In the nuclear energy industry, hydrofluoric acid is mainly used to produce UF4, which is then generated into UF6, which passes through or separates 235U.

Hydrofluoric acid is the basic raw material of organic fluorine chemicals and can be used to produce fluorinated chlorohydrocarbons and fluorocarbons with low toxicity and high chemical stability.

In medicine, fluorine organic compounds can also produce fluorine-containing anticancer drugs.

The chemical industry has high requirements for the quality of fluorite products, and generally requires the content of CaF2 to be between 93% and 98%.

Building Materials Industry

Fluorite is also widely used in glass, ceramics, cement and other building materials industries.

In the glass industry, fluorite is added as a flux and sunscreen. The amount of fluorite added is different for different glasses. For ordinary glass plates, the amount of fluorite added is 1%; for alkaline glass balls, the amount of fluorite added is 1% to 2%; for oxidized glass, the amount of fluorite added is 3%; in the production process of white, cream, and colored glass, fluorite is used as a co-solvent and also as a sunscreen agent. The addition amount is 10%-20% of the charge. The glass industry has stricter quality requirements for fluorite, requiring CaF2>80%; Fe2O3<0.2%.

In cement production, fluorite can lower the temperature of the charge, reduce fuel consumption, and promote the formation of tricalcium silicate. In cement production, the amount of fluorite added is generally 4% to 5%. The cement industry does not have strict requirements on the quality of fluorite. Generally, the content of CaF2 is above 40%, and there is no specific requirement for the content of impurities.

In the ceramic industry, fluorite can play a role in color and flux in the production of enamel. For example, after adding fluorite to red enamel, the color can be bright. The amount of fluorite added in ceramic enamel production is generally about 10% to 20%.

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