White Sandy Sodium Cryolite Na3alf6 Used As Deoxidizer For Casting
Cryolite is mainly composed of sodium hexafluoroaluminate or sodium aluminum fluoride, the molecular formula is Na3AlF6, small white crystals, odorless, specific gravity is 3, hardness 2~3, melting point 1009 degrees Celsius, easy to absorb moisture.
The Hall-Heroult process uses cryolite based fluoride melt as a solvent to produce aluminum. So far, no other compound has been found that can replace cryolite. This is because cryolite, in addition to being able to dissolve alumina, also has some other indispensable properties, such as no electrical elements than aluminum, good stability, under normal conditions do not decompose, do not volatilize, do not delix, melting point is higher than aluminum, good conductivity, saving electricity and so on.
It can be said that if there were no cryolite, there might not be such a large-scale aluminum industry in the world, the price would not be so low, and the application would not be so extensive.
SPECIFICATION
| Name of Product |
: |
Sodium Cryolite |
| Formula |
: |
Na3AlF6 |
| Mol. Wt |
: |
209.97 |
| CAS No. |
: |
15096-52-3 |
| Appearance |
: |
Off white free flowing powder |
| Solubility |
: |
Insoluble in water |
| Melting Point |
: |
1000 OC |
|
Sieve Grading/Density
- 200 BSS (75 mm) |
: |
90 % |
| %Na3AlF6 |
: |
98.00 % Min |
| % Fluorine |
: |
53.00 % Min |
| % Aluminium |
: |
13 - 14 % |
| % Sodium as Na |
: |
31 – 34 % |
| % Moisture |
: |
00.10 % Max |
| % Iron as Fe2O3 |
: |
00.10 % Max |
| % Silica as SiO2 |
: |
00.20 % Max |
PACKING
25 / 50 Kg plastic woven bags with liner / Bulk packing of 1 MT
APPLICATION
Sodium Cryolite salts are used as solvent for bauxite in the electrolytic production of aluminum; other metallurgical applications such as foundry additives for aluminum foundry, sleeves, cover flux; filler for bonded abrasives glass and enamel industries; in the manufacture of insecticides.
1. Used as pesticide in agriculture .
2. Used as bactericide in brewing industry .
3. Used as wood preservative , pharmaceutical preservative .
4. Used as welding flux .
5. Used as alkaline zincate galvanized additive .
6. Used in papermaking and ceramic industry .
7. Used as phosphate coating windustry accelerator, resulting a stable phosphate solution , phosphate refinement , improved phosphate coating performance .
(Aluminum and its alloys phosphate in great danger of closure with negative catalytic Al3 + .)
| Item |
Standard Spec.(%) |
Test result |
| Appearance |
White powder |
White powder |
| Sodium fluoride(NaF) |
≥98 |
98.7 |
| Silicon dioxide (SiO2) |
≤0.5 |
0.46 |
| Sulfate (SiO4) |
≤0.3 |
0.06 |
| Acidity (HF) |
≤0.1 |
0.05 |
| Sodium carbonate(Na2CO3) |
≤0.5 |
0.12 |
| Water insoluble matter |
≤0.5 |
0.45 |
| Water(H2O) |
≤0.5 |
0.12 |
| Mesh size |
80-200mesh |
100mesh |
Packing:
In 25kgs or 50kgs PP bags or multiply paper bags, or 1000kgs-1500kgs jumbo bags, or according to customer's requirement.
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