Description
Graphite electrodes play a crucial role in facilitating electrical conduction during the metal smelting process in electric arc furnaces. As the global utilization of electric arc furnaces for steel production continues to rise, the predominant consumption of graphite electrodes is observed in the smelting of steel ingots and other secondary-formed steel products. Furthermore, these electrodes find application in smelting furnaces utilized for melting non-ferrous metals, ceramics, and in the domain of waste recycling.
Graphite electrode joints serve as essential accessories for graphite electrodes. The demands placed on joints for graphite electrodes are notably high. The production of joints involves specialized processes and can be categorized into different types: ordinary power graphite electrode joints, high-power graphite electrode joints, and ultra-high power graphite electrode joints.
Graphite electrodes and their associated nipples offer distinctive advantages, including heightened strength, resistance to breakage, and excellent current conduction capabilities.
| Item | Nominal diameter mm | ||||||||||
| 75~130 | 150~225 | 250~300 | 350~450 | 500~800 | |||||||
| Grade | Excellent | 一 | Ex | 一 | Ex | 一 | Ex | 一 | Ex | 一 | |
| Resistivity μΩ·m ≤ |
Electrode | 8.5 | 10.0 | 9.0 | 10.5 | 9.0 | 10.5 | 9.0 | 10.5 | 9.0 | 10.5 |
| Connector | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | ||||||
| Flexural strength MPa ≥ | Electrode | 10.0 | 10.0 | 8.0 | 7.0 | 6.5 | |||||
| Connector | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | ||||||
| Elastic Modulus GPa ≤ | Electrode | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | |||||
| Connector | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | ||||||
| Bulk density g/cm3 ≥ | Electrode | 1.58 | 1.53 | 1.53 | 1.53 | 1.52 | |||||
| Connector | 1.70 | 1.70 | 1.70 | 1.70 | 1.70 | ||||||
| Thermal expansion coefficient 10-6/℃ room temperature ~600℃ ≥ |
Electrode | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | |||||
| Connector | 2.7 | 2.7 | 2.8 | 2.8 | 2.8 | ||||||
| Ash % ≤ | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | ||||||
High Power Graphite Electrodes
| Item | Nominal diameter mm | |||
| 200~400 | 450~500 | 550~700 | ||
| Resistivity μΩ·m ≤ |
Electrode | 7.0 | 7.5 | 7.5 |
| Connector | 6.3 | 6.3 | 6.3 | |
| Flexural strength MPa ≥ | Electrode | 10.5 | 10.0 | 8.5 |
| Connector | 17.0 | 17.0 | 17.0 | |
| Elastic Modulus GPa ≤ | Electrode | 14.0 | 14.0 | 14.0 |
| Connector | 16.0 | 16.0 | 16.0 | |
| Bulk density g/cm3 ≥ | Electrode | 1.60 | 1.60 | 1.60 |
| Connector | 1.72 | 1.72 | 1.72 | |
| Thermal expansion coefficient 10-6/℃ Room temperature~600℃ ≥ |
Electrode | 2.4 | 2.4 | 2.4 |
| Connector | 2.2 | 2.2 | 2.2 | |
| Ash % ≤ | 0.5 | 0.5 | 0.5 | |
Ultra High Power Graphite Electrode
| Item | Nominal diameter mm | ||||
| 300~400 | 450~500 | 550~650 | 700~800 | ||
| Resistivity μΩ·m ≤ |
Electrode | 6.2 | 6.3 | 6.0 | 5.8 |
| Connector | 5.3 | 5.3 | 4.5 | 4.3 | |
| Flexural strength MPa ≥ | Electrode | 10.5 | 10.5 | 10.0 | 10.0 |
| Connector | 20.0 | 20.0 | 22.0 | 23.0 | |
| Elastic Modulus GPa ≤ | Electrode | 14.0 | 14.0 | 1.66 | 14.0 |
| Connector | 20.0 | 20.0 | 1.78 | 22.0 | |
| Bulk density g/cm3 ≥ | Electrode | 1.67 | 1.66 | 1.66 | 1.68 |
| Connector | 1.74 | 1.75 | 1.78 | 1.78 | |
| Thermal expansion coefficient 10-6/℃ Room temperature~600℃ ≥ |
Electrode | 1.5 | 1.5 | 1.5 | 1.5 |
| Connector | 1.4 | 1.4 | 1.3 | 1.3 | |
| Ash % ≤ | 0.5 | 0.5 | 0.5 | 0.5 | |
