Aluminum Hardeners 
Anode 
Cathode 
Coking coal 
Aluminium-Titanium 
| Cryolite (Na3AlF6) | |||
Value |
Unit |
Typical |
Specification |
Min |
% |
98 |
Na3AlF6 |
Min |
% |
53 |
F |
– |
– |
1.4 – 1.5 |
Ratio ( 3Naf/AIF3 ) |
Max |
% |
0.20 |
SiO2 |
Max |
% |
0.05 |
Fe2O3 |
Max |
% |
0.15 |
CaO |
Max |
% |
0.15 |
SO3 |
Max |
% |
0.07 |
Na2O |
Max |
% |
0.35 |
Al2O3 |
Max |
% |
0.01 |
P2O5 |
Max |
% |
0.40 |
L.O.I at 550oC – 1 hr |
Max |
% |
0.20 |
Moisture( 105-120 oC For one hour) |
Max |
% |
20 |
Size 10-4 mm |
Max |
% |
70 |
Size 4-1 mm |
Max |
% |
10 |
Size <1 mm |
