Graphite electrode is the conducting element for electric arc furnaces steel making. It is made of petroleum coke, needle coke,coal pitch and produced by a series of strict production processes. High-current lines insert through the graphite electrode port inside the furnace body. This will releases electric energy in the arc furnace to heat the furnace.
UHP Graphite Electrode Index | ||||||||||
Item | Unit | Nominal diameter/mm | ||||||||
300-400 | 450-500 | 550-650 | 700 | |||||||
Typical Value | Range | Typical Value | Range | Typical Value | Range | Typical Value | Range | |||
Specific Resistance | Electrode | μΩ·m | 5.8 | 5.3-6.0 | 5.5 | 4.4-5.6 | 5.0 | 4.7-5.4 | 5.1 | 4.8-5.5 |
Nipple | 3.3 | 3.2-3.5 | 3.3 | 3.2-3.5 | 3.3 | 3.2-3.5 | 3.3 | 3.2-3.5 | ||
Flexural Strength | Electrode | Mpa | 12 | 10.5-13 | 12 | 10.5-13 | 12 | 10-13 | 12 | 10-13 |
Nipple | 22 | 20-24 | 22 | 20-24 | 22 | 22-24 | 23 | 23-24 | ||
Young's Modulus | Electrode | Gpa | 9 | 8-14 | 9 | 8-14 | 9 | 8-14 | 9 | 8-14 |
Nipple | 15 | 13-20 | 15 | 13-20 | 15 | 13-20 | 15 | 13-20 | ||
Bulk Density | Electrode | g/cm3 | 1.72 | 1.68-1.74 | 1.72 | 1.68-1.74 | 1.72 | 1.68-1.74 | 1.72 | 1.68-1.74 |
Nipple | 1.81 | 1.79-1.83 | 1.81 | 1.79-1.83 | 1.81 | 1.79-1.83 | 1.81 | 1.79-1.83 | ||
(100℃-600℃) Coefficient of Thermal Expansion |
Electrode | 10-6/℃ | 1.4 | 1.3-1.5 | 1.4 | 1.3-1.5 | 1.4 | 1.3-1.5 | 1.4 | 1.3-1.5 |
Nipple | 1.3 | 1.2-1.4 | 1.3 | 1.2-1.4 | 1.3 | 1.2-1.3 | 1.3 | 1.2-1.3 | ||
Ash Content | % | ≤0.2 |