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Cryolite
Molecular formula: Na3AlF6
Molecular weight : 209.94
Properties: Crystal white powder. Slightly soluble in water, density 2.95~3, melting point 1000℃
Use: Electrolytic aluminium flux, pesticide, flux, auxiliaries.
GB/T4291-1999
|
Chemical Constituents |
Special grade |
First order |
Second grade |
|
Fluorine(F)% ≥ |
53 |
53 |
53 |
|
Sodium (Na)%≤ |
32 |
32 |
32 |
|
Aluminum (Al)%≥ |
13 |
13 |
13 |
|
Water(H2O)%≤ |
0.4 |
0.5 |
0.8 |
|
Silica(SiO2)%≤ |
0.25 |
0.36 |
0.4 |
|
Ferric oxide (Fe2O3)%≤ |
0.05 |
0.08 |
0.10 |
|
Sulfate(SO4)% ≤ |
0.7 |
1.20 |
1.30 |
|
Phsophorus pentoxide(P2O5)% ≤ |
0.02 |
0.03 |
0.03 |
|
Ignition loss 550,30MIN ≤ |
2.5 |
3.00 |
3.00 |
|
Calcium oxide% ≤ |
0.10 |
0.15 |
0.20 |
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