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Chinese Fluorspa CAS No. 7789-75-5 Calcium Fluoride lump 3-25mm Metallugical grade
Fluorite or Fluorspar is a mineral composed of calcium fluoride (CaF2), the principal fluorine-bearing mineral. It occurs as cubic, isometric crystals and cleavable masses. When pure, it is colorless and transparent, or translucent with a glassy luster. Impurities cause color in the stone, and several varieties exhibit fluorescence. Usually found either in pure veins or associated with lead, silver, or zinc ores, it is common in limestone and dolomites. Fluorite occurs in England and the United States. Fluorite comes in a wide range of colors and has subsequently been dubbed "the most colorful mineral in the world". The most common colors are purple, blue, green, yellow, or colorless. Less common are pink, red, white, brown, black, and nearly every shade in between. Color zoning or banding is commonly present. The color of the fluorite is determined by factors including impurities, exposure to radiation, and the size of the color centers.
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Chemical Name: Fluorspar
Other Name: calcium fluoride, fluorspar, CaF2, fluorspar powder, fluorite,
Chemical Formula: CaF2
CAS# 7789-75-5
Formula: CaF2
Molecular:78.08
EINECS No.:232-188-7
H.S.code: 2826199090
Execute standard: GB/T 5195.10-2006
Chemical Properties
1) Crude ore- 25 to 30%
2) Metallurgical grade- 75 to 82%
3) Ceramic grade- 94 to 96%
4) Acid grade- 97%
5) Crystalline grade- 99%
Physical Properties
Various granulations available from lump to superfine powder (45 microns)
Applications
Three main commercial grades of fluorspar are distinguished: metallurgical grade (75-82% CaF2), ceramic grade (94-96% CaF2) and acid grade (97% CaF2).
Metallurgical grade fluorspar (metspar) representing almost one third of world production volume is used in the manufacturing of aluminium and stainless steel, in extraction of metals such as niobium and tantalum, in metal processing to remove unwanted impurities and in various other applications.
Ceramic grade fluorspar is used in the fabrication of fiberglass insulation, flint glass, opal glass and enamels. Another prominent use for fluorspar or fluorspar mixtures is as a coating for welding rods and in the production of magnesium and calcium metals.
Acid grade fluorspar (acidspar) is the highest valued and economically most important one (two thirds of world production volume) since it is used as a feedstock for the production of HF, principal base for the production of fluorocarbons and -polymers.
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