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Cryolite

CAS No.: 15096-52-3;13775-53-6;1344-75-8
Molecular Formula: Na3AlF6
Quality Standard: GB/T4291—2017

Specificationsú║

Items Class
Chemical Composition ( Concentration )/ %
Not less than
Not more than
F
Al
Na

SiO2

Fe2O3

SO42-

CaO

P2O5

H2O

Loss on ignition
, 550íŠ30min
CH-0
52
12
33
0.25
0.03
0.50
0.10
0.02
0.20
2.0
CH-1
52
12
33
0.36
0.05
0.80
0.15
0.03
0.40
2.5
CM-0
53
13
32
0.25
0.05
0.50
0.20
0.02
0.20
2.0
CM-1
53
13
32
0.36
0.08
0.80
0.60
0.03
0.40
2.5

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 1025íŠ, 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 25/50/1000kgs plastic woven bag lined with high-pressure plastic film, or according to customer's requirements.


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