Graphitic cathode carbon block for aluminium electrolytic bath and its producing method
A technology of aluminum electrolytic cells and cathode carbon blocks, which is applied in the field of graphitized cathode carbon blocks, can solve the problems that the performance of carbon blocks cannot be improved through breakthroughs, and achieve good electrolyte erosion resistance, low electrolytic expansion rate, and extended life. Effect
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Embodiment 1
[0034] Graphitized cathode carbon block for aluminum electrolytic cells, its raw material ratio (weight percentage) coal tar pitch 23%, petroleum coke 75%, Fe 2 o 3 powder 0.5%, stearic acid 1.5%.
[0035] The particle size composition (percentage by weight) of the dry material is 6-4mm, 20%; 4-1mm, 25%; 1-0.15mm, 15%; ≤0.15mm, 40%.
Embodiment 2
[0037] Graphitized cathode carbon block for aluminum electrolytic cells, its raw material ratio (weight percentage) coal tar pitch 25%, pitch coke 73%, Fe 2 o 3 powder 1.5%, stearic acid 0.5%.
[0038] The particle size composition (percentage by weight) of the dry material is 6-4mm, 10%; 4-1mm, 26%; 1-0.15mm, 19%; ≤0.15mm, 45%.
Embodiment 3
[0040] Graphitized cathode carbon block for aluminum electrolytic cells, its raw material ratio (weight percentage) coal tar pitch 21%, petroleum coke and pitch coke (1:1) 77%, Fe 2 o 3 powder 1%, stearic acid 1%.
[0041] The particle size composition (percentage by weight) of the dry material is 6-4mm, 32%; 4-1mm, 20%; 1-0.15mm, 13%; ≤0.15mm, 35%.
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