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550mm High Power Graphite Electrode (HP) — Custom-Engineered for High-Load Applications
The 550mm high-power graphite electrode is a custom, non-standard product tailored for large-capacity submerged arc furnaces (SAF). It offers exceptional thermal stability, electrical conductivity, and mechanical strength, widely used in extreme smelting conditions such as manganese alloy production.
Description
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Product Description
This HP electrode is specially developed for high-load metallurgical operations, mainly for submerged arc furnaces in ferroalloy production under high-temperature, high-current density conditions.
HP Graphite Electrode Parameters — 550mm
| Item | Unit | Electrode | Nipple |
| Resistivity | μΩ·m | 5.2 ~ 6.5 | 3.5 ~ 4.5 |
| Bending Strength | MPa | ≥ 11.0 | ≥ 22.0 |
| Elastic Modulus | GPa | ≤ 12.0 | ≤ 15.0 |
| Bulk Density | g/cm³ | 1.68 ~ 1.73 | 1.78 ~ 1.83 |
| Thermal Expansion CTE | 10⁻⁶/℃ | ≤ 2.0 | ≤ 1.8 |
| Ash Content | % | ≤ 0.2 | ≤ 0.2 |
| Allowable Current | A | — | 34000–53000 |
| Current Density | A/cm² | — | 14–22 |
| Actual Diameter | mm | Max 562 Min 556 | — |
| Actual Length | mm | 1800 ~ 2400 customizable | — |
| Length Tolerance | mm | ±100 | — |
| Short Length | mm | — | — |
Raw Materials & Manufacturing
● Formula: 70% petroleum-based needle coke + 30% coal-based coke — balancing conductivity, thermal resistance, and cost.
● Forming: Non-equidistant spiral extrusion ensures directional conductivity and reduced anisotropy effects.
● Processing: Multiple vacuum impregnations + high-temperature baking + graphitization over 85 days in furnaces ≥1.8 m diameter ensure crystalline orientation and low resistivity.
Storage & Handling
● Avoid humidity fluctuations to prevent micro-cracking and oxidation.
● Recommended storage temperature: 25℃ ± 5℃
● Packaging: Reinforced anti-collision wooden crates with moisture-proof lining.
● Lifting: Only use non-metallic slings. No direct metal chain contact.
Applications & Export Markets
● Widely used in Southeast Asia and the Middle East
● Ideal for:
1.FeMn, SiMnsubmerged arc furnace operations
2.≥300-ton EAFs and ≥45 MVA SAFs
Key Performance Advantages
● Excellent thermal shock and oxidation resistance
● Lower consumption per ton (≈0.5 kg/ton reduction)
● Enhanced arc stability and joint conductivity
● Longer service life, even under extreme loads
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