A cathode block for aluminum refining containing a calcined coke in a proportion of 15 to 100 wt %, characterized in that the calcined coke is prepared by mixing a heavy oil having a content of quinoline insoluble components of 10 to 25 wt % with 3 to 20 wt % of carbon black, and subjecting the resultant mixture to coking and then calcination.
The cathode block for aluminum refining is excellent in resistance to abrasion and thus has a prolonged life. With the annual output 50,000MT, we’ve exported to RUSAL, HYDRO, ORMET, NALCO, ALBRAS and Etc.
we passed ISO9001: 2000 test, also, we have a completed system of controlling, to guarantee the quality by rigorous technology.
Particulars as stated below:
|
Apparent Density |
G/cc |
≥1.57 |
|
Real Density |
G/cc |
≥1.94 |
|
Total Porosity |
% |
≤20 |
|
Compressive Strength |
MPA |
≥23 |
|
Flexural Strength |
MPA |
≥6 |
|
Specific Electrical resistance@20℃ |
μΩ.m |
≤35 |
|
Specific Electrical resistance@1000℃ |
μΩ.m |
≤30 |
|
Coefficient of Linear expansion20--525℃ |
10-3/0K |
≤3.5 |
|
Thermal conductivity@30℃ |
W/M0K |
≥10 |
|
Thermal conductivity@1000℃ |
W/M0K |
≥12 |
|
Relative Lengthening (rapoport test) |
% |
≤0.50 |
|
Ash content |
% |
≤3.0 |
Dow Group