Cryolite (Cryolite) one kind of halide minerals, six sodium aluminum fluoride (Na3AlF6), as sodium aluminum fluoride. Generic sodium aluminum fluoride, sodium cryolite, also known as, referred to cryolite. Color from colorless to white between, there are light brown, pink, brick red. Glass gloss to the oil sheen. White monoclinic (109 degrees C), slightly soluble in water, soluble in alumina, the Mig Welding Wires industry as a flux, white glass and enamel manufacture sunscreens. West coast of Greenland cryolite is the main origin of this ore mining is completed in 1987. At present more than six fluorite synthetic sodium aluminum fluoride for industrial use.
First, the physical and chemical properties
Cryolite formula Na3AlF6, molecular weight 209.94, is a complex compound or complex salt, the color due to impurities and white, gray, yellow, crystalline powder or granules, and its melting point 1025 ℃, the packing density of 0.6 ~ 1.0g / L, true density of 2.95 ~ 3.05g/cm3, heat of formation for the 225KJ, accounting for 2.75 ~ 3.00g/cm3, melting heat 107KJ.
Second, the use of
Mainly used aluminum flux; also used as the abrasive wear additive products can effectively improve the grinding wheel wear, cut, cut power to extend the wheel life and storage time; alloy and flux boiling steel, nonferrous metal flux , casting deoxidizer, olefin polymerization catalyst, and anti-reflective coatings for glass, enamel emulsifier, glass, white agents, sunscreens, Welding Wire China flux, ceramic fillers, pesticides, insecticides industries and enterprises.