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Graphite electrode is made of high quality petroleum coke and pitch. This product goes through the process of calcining, matching, blending, modeling, baking, graphitization and machining and etc before it rolls off the line. The nipple of the electrode takes the technology of three-time impregnating and four-time baking to produce.
Items | Unit | Nominal Diametermm | |||||
RP | HP | UHP | |||||
350~500 | 300~400 | 450~500 | 300~400 | 450~500 | |||
Electrical Resistivity ≤ | Electrode | μΩm | 8.5 | 7.5 | 7.5 | 6.5 | 6.5 |
Nipple | 8 | 6 | 6 | 5.5 | 5.5 | ||
Break Resistance Intensity ≥ | Electrode | Mpa | 8 | 12 | 10.5 | 13 | 11 |
Nipple | 15 | 15 | 15 | 17 | 17 | ||
Elastic Modulus ≤ | Electrode | pa | 9 | 11 | 11 | 12 | 12 |
Nipple | 13 | 14 | 14 | 16 | 16 | ||
Bulk Density ≥ | Electrode | g/cm3 | 1.56 | 1.62 | 1.62 | 1.66 | 1.65 |
Nipple | 1.7 | 1.72 | 1.72 | 1.74 | 1.72 | ||
Thermal Expansion Coeffcient (100°C~600°C)≤ | Electrode | 10-6/°C | 2.9 | 2.4 | 2.4 | 1.5 | 1.5 |
Nipple | 2.8 | 2.2 | 2.2 | 1.4 | 1.4 | ||
Ash Content ≤ | 0.5 | 0.5 | 0.3 | 0.3 | 0.3 | ||
Graphite electrode HP dia 225-400mm