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350mm Regular Power (RP) Graphite Electrode — Enhanced Efficiency for Medium-Capacity Electric Arc Furnaces
The 350mm RP graphite electrode offers a strong balance of conductivity, thermal stability, and cost-efficiency. Designed for medium-capacity EAFs, it performs reliably in continuous steelmaking and ferroalloy production. A smart choice for reducing energy use and improving operational stability.
Description
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Main Description
The 350mm RP graphite electrode is specifically designed for medium-capacity electric arc furnaces (EAFs), delivering improved electrical performance and mechanical reliability. With a current-carrying capacity of 13,500–18,000 A and a current density of 14–18 A/cm², it balances cost-efficiency with dependable performance.
Technical Specifications:
| 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 ~ 1.64 | ≥ 1.74 |
| Coefficient of Thermal Expansion (CTE) | 10⁻⁶/°C | ≤ 2.4 | ≤ 2.0 |
| Ash Content | % | ≤ 0.3 | ≤ 0.3 |
| Allowable Current | A | — | 13500 ~ 18000 |
| Current Density | A/cm² | — | 14 ~ 18 |
| Actual Diameter | mm | Max: 358 Min: 352 | — |
| Actual Length | mm | 1600–1800 (customizable) | — |
| Length Tolerance | mm | ±100 | — |
| Short Ruler Length | mm | -275 | — |
Raw Materials & Manufacturing Process:
This RP-grade electrode is manufactured using high-quality petroleum coke with the addition of a small proportion of needle coke to improve conductivity and thermal shock resistance.
Coal tar pitch is used as a binder. The optimized process includes:
● Calcination of raw coke at ~1250 °C
● Homogeneous mixing with modified pitch for uniform filler distribution
● High-pressure extrusion or molding to ensure structural integrity and consistent density
● Initial baking at 800–900 °C to develop mechanical strength
● Vacuum pitch impregnation followed by secondary baking to reduce porosity
● Graphitization at up to 2800 °C to achieve full graphitization and crystalline alignment
This controlled process yields a low-resistivity, high-integrity electrode ideal for continuous melting cycles.
Application Fields:
● Medium-capacity EAFs for carbon steel and alloy steel production
● Ladle furnaces (LFs) for secondary refining
● Submerged arc furnaces (SAFs) for producing ferrosilicon and other ferroalloys
● Continuous operation plants requiring reduced electrode consumption and energy losses
Usage Note:
This RP electrode is not intended for Ultra-High Power (UHP) applications or high-frequency arc environments. Exceeding rated current may cause thermal stress fractures and reduce service life.
Performance Benefits:
● Reduces energy consumption by up to 5% under standard steelmaking conditions
● Strong oxidation resistance and enhanced thermal shock durability
● Homogeneous structure minimizes cracking and structural fatigue
● Cost-effective choice for operations not requiring UHP-grade performance
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