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product name: | Cryolite |
| Place of Origin: | Peoples Republic of China | |
| Post Date: | May 14, 2012 | |
| Edit Date: | June 8, 2012 | |
Detailed Product Description:
Molecular Formula：Na3AlF6
Quality Standard : GB/T4291—2007
SPECIFICATION:
F 52~53 % min
Al 12~13% min
Na 32~33% max
SiO2 0.25~0.36% max
Fe2O3 0.05~0.08% max
SO42- 0.6~1.0% max
CaO 0.15~0.20% max
P2O5 0.02~0.03% max
H2O 0.20~0.40% max
Loss of Ignition (550 Celsius, 30min) 2.0~2.5% max
Size Distribution:
Granular ( 0-10mm )
Sandy ( 80mesh )
Powder ( 200mesh, 325mesh )
Physical 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.
Applications
Aluminium- 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.