What Is The Basic Information Of Graphite Electrodes?
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What is the basic information of graphite electrodes?
Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar as binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. They are conductors that release electric energy in the form of arc in an electric arc furnace to heat and melt the charge. According to their quality indicators, they can be divided into ordinary power graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes.
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Unit
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Nominal Diameter
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UHP UIta-High-Power
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HP Superstrong
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RP Conventional Power
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≤Φ400
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≥Φ450
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≤Φ400
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≥Φ450
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≤Φ300
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≥Φ350
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Resistivity
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Electrode
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ΜΩ-m
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≤5.5
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≤6.5
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≤8.5
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Nipple
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≤4.5
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≤5.5
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≤6.5
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Flexural Strength
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Electrode
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MPa
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≥11.0
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≥10.5
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≥9.8
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≥8.5
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≥7.0
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Nipple
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≥20.0
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≥16.0
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≥15.0
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Elastic Modulus
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Electrode
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GPa
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≤14.0
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≤12.0
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≤9.3
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Nipple
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≤18.0
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≤16.0
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≤14.0
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Oensity
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Electrode
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g / cm3
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≥1.66
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≥1.67
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≥1.62
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≥1.6
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≥1.53
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≥1.52
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Nipple
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≥1.75
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≥1.73
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≥1.69
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Coefficient of Thermal Expansion
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Electrode
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10-6 / ℃
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≤1.5
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≤2.4
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≤2.9
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Nipple
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≤1.4
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≤2.2
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≤2.8
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ASH
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％
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≤0.3
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≤0.3
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≤0.5
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Note：1.Koefitsient ash content and thermal expansion as the reference index the coefficient of thermal
expansion(100℃~600℃),custom manufacturing |
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The main raw material for the production of graphite electrodes is petroleum coke. A small amount of asphalt coke can be added to ordinary power graphite electrodes. The sulfur content of petroleum coke and asphalt coke cannot exceed 0.5%. Needle coke is also required when producing high power or ultra-high power graphite electrodes. The main raw material for the production of aluminum anodes is petroleum coke, and the sulfur content is controlled to be no more than 1.5% to 2%. Petroleum coke and asphalt coke should meet the relevant national quality standards.
