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HP Graphite Electrodes
HP graphite electrodes are widely used in electric arc furnace steelmaking, metallurgical processes, and high-temperature electrolysis. Their excellent conductivity and heat resistance significantly improve smelting efficiency and product quality, making them essential in modern metallurgy.
Description
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Product Introduction
The main raw materials for the HP graphite electrode body are imported oil needle coke and high-quality petroleum coke from PetroChina Fushun Petrochemical Plant.
The production processes include calcining, dosing, kneading, forming, baking, impregnation, secondary baking, graphitization, and machining.
The nipples are made from imported oil needle coke using a two-step impregnation and three-step baking process.
HP Graphite Electrodes Specifications
| Item | Unit | Nominal Diameter (mm) | 200~400 | 450~500 | 550~700 |
| Resistivity | μΩ·m | Electrode | 5.2 ~ 6.5 | 5.2 ~ 6.5 | 5.2 ~ 6.5 |
| Nipples | 3.5 ~ 4.5 | 3.5 ~ 4.5 | 3.2 ~ 4.3 | ||
| Bending Strength | MPa | Electrode | ≥ 11.0 | ≥ 11.0 | ≥ 10.0 |
| Nipples | ≥ 20.0 | ≥ 22.0 | ≥ 22.0 | ||
| Elastic Modulus | GPa | Electrode | ≤ 12.0 | ≤ 12.0 | ≤ 12.0 |
| Nipples | ≤ 15.0 | ≤ 15.0 | ≤ 15.0 | ||
| Bulk Density | g/cm³ | Electrode | 1.68 ~ 1.73 | 1.68 ~ 1.73 | 1.68 ~ 1.72 |
| Nipples | 1.78 ~ 1.83 | 1.78 ~ 1.83 | 1.78 ~ 1.83 | ||
| Thermal Expansion Coefficient (C.T.E) | 10⁻⁶/°C | Electrode | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 |
| Nipples | ≤ 1.8 | ≤ 1.8 | ≤ 1.8 | ||
| Ash Content | % | ≤ 0.2 | ≤ 0.2 | ≤ 0.2 |
HP Graphite Electrodes Nipples Specifications
| Nominal Diameter (mm) | Allowable Current (A) | Current Density (A/cm²) | Nominal Diameter (mm) | Allowable Current (A) | Current Density (A/cm²) |
| 200 | 6500 ~ 10000 | 18 ~ 25 | 450 | 25000 ~ 40000 | 15 ~ 24 |
| 250 | 8000 ~ 13000 | 17 ~ 27 | 500 | 30000 ~ 48000 | 15 ~ 24 |
| 300 | 13000 ~ 17500 | 17 ~ 24 | 550 | 34000 ~ 53000 | 14 ~ 22 |
| 350 | 17400 ~ 24000 | 17 ~ 24 | 600 | 38000 ~ 58000 | 13 ~ 21 |
| 400 | 21000 ~ 31000 | 16 ~ 24 | 700 | 45000 ~ 72000 | 12 ~ 19 |
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