Synthetic cryolite
Molecular formula: Na3AlF6
1> Properties: it is crystalline white powder. Slightly soluble in water, density 2.95-3, melting point 1000oC, easily absorbing water and become damp, decomposed by strong acids like sulfuric acid and hydrochloride, then producing hydrofluoric acid and relevant aluminum salt and sodium salt.
2> Uses: mainly used in flux of electrolytic aluminum, pesticide, flux of ceramic colors, anti-rubbing filling agent of resin and rubber, electrolytic liquid for production of iron alloy rimmed steel and furnish of emery wheel.
3> Packing: package can be 25/50/1000kg plastic woven bags with shrink film, or according to customers requirements.
4> Specifications: GB4291-1999
|
Ingredient |
Super |
First grade |
Second grade |
|
F%≥ |
53 |
53 |
53 |
|
Na% ≥ |
32 |
32 |
32 |
|
Al≥ |
13 |
13 |
13 |
|
H2O%≤ |
0.4 |
0.5 |
0.8 |
|
SiO2≤ |
0.25 |
0.36 |
0.4 |
|
Fe2O3%≤ |
0.05 |
0.08 |
0.10 |
|
SO4%≤ |
0.7 |
1.20 |
1.30 |
|
P2O5%≤ |
0.02 |
0.03 |
0.03 |
|
Ignite on 550oC≤ |
2.5 |
3.00 |
3.00 |
|
CaO%≤ |
0.10 |
0.15 |
0.20 |