Molecular formula : Na3AlF6
Molecular weight : 209.94
Property :
Colorless single crystal. Sometimes, its color will be off-white, slight red, primorse or black due to impurities in it. It has the luster of glass. Relative density is 2.9-3.0; M.P. is 1,000°C; slightly soluble in water and the PH value of its aqueous solution is less than 7. It will give off toxic hydrogen fluoride (gas) if confronted with sulfuric acid.
Use :
Fluxing agent for aluminum production, pesticides, as the fusing agent and opaliger for enamel; also used for making opal glass; as the electrolyte in the production of aluminum alloy, ferric alloy and rimmed steel; as the auxiliary material for grindstone; the raw material for hot dip aluminium coating with steel and iron.
Product quality : National standard GB4291£84
|
Index name |
Index |
Note : |
|
Special grade |
First grade |
Second grade |
|
F, %≥ |
53 |
53 |
53 |
1. Chemical ingredients are on dry base; 2. The ratio between the molecular of sodium fluoride and aluminum fluoride is generally 2 or so. Special requirements should be noted in the contract; 3. cryolite is white powder; 4. Lump whose diameter is bigger than 4mm is acceptable, but their weight can not exceed 5%.
|
|
Al, %≥ |
13 |
13 |
13 |
|
Na, %≤ |
31 |
31 |
31 |
|
IronSiO2+Fe2O3,%≤ |
0.25 |
0.4 |
0.5 |
|
Sulfate(SO4), ≤ |
0.08 |
1.2 |
1.5 |
|
(P2O5), %≤ |
0.02 |
0.05 |
0.05 |
|
Water content(H2O),%≤ |
0.5 |
0.8 |
1.3 |
Casing : Plastic woven bag lined with high-pressure polythene plastic bag, net weight 25 kg
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