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Potassium fluoroaluminate( Potassium Cryolite)
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Chemical Names: Potassium fluoroaluminate¡Fpotassium aluminium fluoride
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Formula: KAlF4, K3AlF6
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F
Al
K
Fe2O3
SO4
H2O
50-52
17-18
29-32
0.01
0.05
1.2
¤@¯Å
49-51
17-18
28-32
0.1
0.6
¤G¯Å
45-51
15-19
27-35
1.0
Spec: (%)
F
Al
K
Fe2O3
SO4
H2O
Super grade
50-52
17-18
29-32
0.01
0.05
1.2
I grade
49-51
17-18
28-32
0.1
0.6
II grade
45-51
15-19
27-35
1.0
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Properties: white or grey-white crystal powder; fineness: 20, 40, 100, 200 and 325mesh, composed by KF-AlF3, Molecular rate near 1.2, melting point 557¢J-580¢J. Solubility in 1000g water: at 0¢J: 0.8g; at 25¢J: 1.42g¡Aat 100¢J: 4.58g.
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Application¡GIt is used as welding flux in aluminum alloy and stainless steel, a degasser and an
auxiliary solvent in aluminum alloy fabrication, also used as an active filler for glass, ceramic and friction compound.
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Packing: in 25/1000kg plastic woven bags with film lining.