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450mm RP Graphite Electrode — Optimized Conductivity and Cost-Effective Performance for Large Electric Arc Furnaces
The 450mm RP graphite electrode is engineered for large electric arc furnaces, offering high conductivity, excellent oxidation resistance, and thermal stability. Advanced manufacturing ensures low resistivity and strong mechanical strength, reducing electrode consumption per ton and boosting production efficiency—an ideal choice for cost-effective steelmaking.
Description
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Basic Description
The 450mm Regular Power (RP) graphite electrode is specifically engineered for high-capacity Electric Arc Furnaces (EAFs), offering reliable electrical conductivity, robust oxidation resistance, and enhanced thermal performance under standard operating conditions. It is widely used in carbon steel and ferroalloy production where cost-efficiency and mechanical stability are essential.
RP450 Graphite Electrode Specification
| Parameter | Unit | Electrode | Nipple |
| Resistivity | μΩ·m | 7.5 ~ 8.5 | 5.8 ~ 6.5 |
| Bending Strength | MPa | ≥ 8.5 | ≥ 16.0 |
| Elastic Modulus | GPa | ≤ 9.3 | ≤ 13.0 |
| Bulk Density | g/cm³ | 1.55 ~ 1.63 | ≥ 1.74 |
| Thermal Expansion Coefficient (CTE) | 10⁻⁶/°C | ≤ 2.4 | ≤ 2.0 |
| Ash Content | % | ≤ 0.3 | ≤ 0.3 |
| Allowable Current | A | — | 22000 ~ 27000 |
| Current Density | A/cm² | — | 13 ~ 17 |
| Actual Diameter | mm | Max: 460 Min: 454 | — |
| Actual Length | mm | 1800~2400 (Customizable) | — |
| Length Tolerance | mm | ±100 | — |
| Short Ruler Length | mm | -275 | — |
Raw Materials & Manufacturing Process
Made from premium petroleum coke and a small proportion of needle coke, the 450mm RP graphite electrode is produced using a precision-controlled process:
● Calcination of raw coke at ~1300 °C to eliminate volatiles
● Homogeneous mixing with modified coal tar pitch binder
● High-pressure molding to ensure dimensional stability and prevent internal cracks
● First baking at 800–900 °C to strengthen the carbon matrix
● Vacuum pitch impregnation and secondary baking to reduce porosity and increase density
● Final graphitization at 2800–3000 °C to ensure high crystalline alignment and conductivity
These steps ensure a low-resistivity, high-density graphite electrode with uniform microstructure and superior arc stability.
Application Fields
● High-capacity Electric Arc Furnaces (EAFs) for carbon and alloy steel production
● Ladle Furnaces (LFs) used in secondary metallurgy
● Submerged Arc Furnaces (SAFs) for FeSi, FeMn, and other ferroalloys
● Continuous casting and EAF-based steelmaking operations in integrated plants producing over 600,000 metric tons per year
● Melt shops seeking to reduce electrode consumption and energy loss
Operational Considerations
This RP-grade electrode is not suitable for UHP furnace applications. Operating beyond rated current may lead to thermal stress, cracking, or premature failure. Adherence to arc control protocols and routine joint inspections is recommended to maximize service life.
Performance Highlights & Cost Benefits
● Reliable operation under standard thermal and current conditions
● Up to 8 kg reductionin electrode consumption per ton of steel
● Minimized downtime due to reduced electrode wear and oxidation
● Balanced performance for plants targeting cost-to-performance optimization
● Compatible with environmental systems such as baghousesand dust collectors
Summary
The 450mm RP graphite electrode is a strategic choice for high-volume steel producers operating large EAFs under standard conditions. With its excellent conductivity, low resistivity, and optimized structural integrity, it delivers consistent performance while helping reduce electrode-related costs and unplanned downtimes. Its compatibility with eco-friendly systems also supports modern steelmakers in meeting sustainability goals.
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