Synthetic Cryolite

　　CAS No.: 15096-52-3;1344-75-8Molecular Formula: Na3AlF6Quality Standard: GB/T4291—2007Specifications：Items

　　ClassChemical Composition ( Concentration )/ %Not less thanNot more thanFAlNaSiO2Fe2O3SO42-CaOP2O5H2OLoss on ignition, 550℃30min

　　CH-0

　　52

　　12

　　33

　　0.25

　　0.05

　　0.6

　　0.15

　　0.02

　　0.20

　　2.0

　　CH-1

　　52

　　12

　　33

　　0.36

　　0.08

　　1.0

　　0.20

　　0.03

　　0.40

　　2.5

　　CM-0

　　53

　　13

　　32

　　0.25

　　0.05

　　0.6

　　0.20

　　0.02

　　0.20

　　2.0

　　CM-1

　　53

　　13

　　32

　　0.36

　　0.08

　　1.0

　　0.60

　　0.03

　　0.40

　　2.5Physical properties: Cryolite is a kind of complex compound or double salt. Caused by impurity, the appearance can be white, gray ,yellow powder or crystalline particles. It's melting point is 1025℃, stacking density is 0.6-1.0g/L, true density is 2.95-3.05g/cm 3 , heat of formation is 225KJ, specific gravity is 2.75-3.00g/cm 3 , heat of fusion is 107KJ. Slightly solubte in water.ApplicationsAluminium- metallurgy: as component of fluxing agents, protective and refining salts;Production of abrasives: as active filler in resinbonded abrasives for metal treatment;Production of enamel, glazing frits and glass: as flux and opacifying agent;Production of soldering agent: as component for fluxing agents;Production of welding agents: as component of welding rod coatings and welding powders;Blasting and pyrotechnics: for fireworks;Metal surface treatment: as component in pickling pastes for stainless steel.Packing: In 50kgs plastic woven bag lined with high-pressure plastic film, or according to customer's requirements.