What are the types of graphite electrodes?
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High Power Graphite Electrodes Physical and Chemical Index:
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Item
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Nominal diameter mm
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200~400
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450~500
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550~700
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Resistivity
μΩ·m ≤ |
Electrode
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7.0
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7.5
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7.5
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Connector
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6.3
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6.3
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6.3
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Flexural strength MPa ≥
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Electrode
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10.5
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10.0
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8.5
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Connector
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17.0
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17.0
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17.0
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Elastic Modulus GPa ≤
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Electrode
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14.0
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14.0
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14.0
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Connector
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16.0
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16.0
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16.0
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Bulk density g/cm3 ≥
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Electrode
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1.60
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1.60
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1.60
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Connector
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1.72
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1.72
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1.72
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Thermal expansion coefficient 10-6/℃
Room temperature~600℃ ≥ |
Electrode
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2.4
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2.4
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2.4
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Connector
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2.2
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2.2
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2.2
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Ash % ≤
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0.5
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0.5
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0.5
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(1) Ordinary power graphite electrodes. Graphite electrodes with a current density lower than 17A/cm2 are allowed to be used, mainly for ordinary power electric furnaces for steelmaking, silicon refining, yellow phosphorus refining, etc.
(2) Anti-oxidation coated graphite electrodes. Graphite electrodes with an anti-oxidation protective layer coated on the surface form a protective layer that is both conductive and resistant to high-temperature oxidation, reducing electrode consumption during steelmaking.
(3) High-power graphite electrodes. Graphite electrodes with a current density of 18 to 25A/cm2 are allowed to be used, mainly for high-power electric arc furnaces for steelmaking.
(4) Ultra-high power graphite electrodes. Graphite electrodes with a current density greater than 25A/cm2 are allowed to be used. Mainly used for ultra-high power steelmaking electric arc furnaces.
