Graphite electrode with a diameter of 348mm and its manufacturing method
A graphite electrode and graphite crushing technology, which is applied in the field of graphite electrodes, can solve the problems of high strength and low porosity
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[0015] A kind of preparation method of diameter 348mm graphite electrode its preparation method is as follows:
[0016] (1) Calcination: Three kinds of high-quality petroleum cokes from Fushun, Tianjin and Jinzhou are mixed and pre-crushed according to the ratio of 40-60%, 20-30% and 20-30%, and then calcined. Density ≥ 2.08g / ㎝³, powder resistivity ≤ 500μΩm;
[0017] (2) Ingredients: Mix the petroleum coke calcined in step (1) and the domestic needle coke at a ratio of 70-80% and 20-30%, crush and sieve to obtain dry materials of different particle sizes, according to the following weight Percentage composition for batching: 18~25% of mixed petroleum coke with medium particle size of 2~0.5mm, 18~25% of mixed petroleum coke with small particle size below 0.5mm, 48~55% of powder with particle size of 0.074mm, and 5~12% of graphite powder with particle size below 2mm %; Finally, adding 10-25% of the total weight of dry material raw crushed;
[0018] (3) Making raw electrode pro...
Embodiment 1
[0028] The graphite electrode with a diameter of 348 mm in this embodiment is mainly composed of high-quality mixed petroleum coke as raw material of different particle sizes. 18% of petroleum coke, 55% of 0.074mm powder, and 9% of graphite fragments with a particle size of 2mm or less; add 24% of the binder in the dry material, and add 0.3% of stearic acid in the dry material; Add raw ground 10% by total weight of dry ingredients.
[0029] The preparation method of the 348mm diameter graphite electrode of the present embodiment is as follows:
[0030] (1) Calcination: Three kinds of high-quality petroleum cokes from Fushun, Tianjin and Jinzhou are mixed and pre-crushed according to the proportion of 40%, 30% and 30%, and then calcined. Resistivity≤500μΩm;
[0031] (2) Ingredients: Mix the petroleum coke calcined in step (1) and domestic needle coke at a ratio of 70% and 30%, grind and sieve to obtain dry materials of different particle sizes, and mix according to the follow...
Embodiment 2
[0037] The graphite electrode with a diameter of 348 mm in this embodiment mainly consists of high-quality mixed petroleum cokes of different particle sizes as raw materials. The composition of the dry materials is: 25% of mixed petroleum coke with a medium particle size of 0.5 mm, and small particle sizes below 0.5 mm. 18% of mixed petroleum coke, 52% of 0.074mm powder, and 5% of graphite fragments with a particle size of less than 2mm; add 28% of the binder in the dry material, and add 0.5% of stearic acid in the dry material ; Add 25% of the total weight of the dry ingredients raw mince.
[0038] The preparation method of the 348mm diameter graphite electrode of the present embodiment is as follows:
[0039] (1) Calcination: Three kinds of high-quality petroleum cokes from Fushun, Tianjin and Jinzhou are mixed and pre-crushed according to the ratio of 60%, 20% and 20%, and then calcined. Resistivity≤500μΩm;
[0040] (2) Ingredients: Mix the petroleum coke calcined in step...
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