Graphite Products Carbon Electrode UHP/HP/RP Dia 300-700mm With Nipple For Eaf
For large-scale electric arc furnaces (EAFs) processing 200+ tons of scrap, 300–700mm diameter graphite electrodes with nipples are indispensable. These electrodes-classified as UHP (Ultra-High Power), HP (High Power), and RP (Regular Power)-are engineered to deliver unmatched conductivity, durability, and compatibility with EAF operations.
Larger diameters (300–700mm) minimize current density, reducing heat concentration at the electrode tip and extending service life. A 600mm UHP electrode in a 300-ton EAF operates at 100–120 kA with a resistivity of <55 μΩ·m, cutting energy consumption by 15–20% compared to smaller electrodes. The nipple (threaded end) ensures secure connections to furnace roofs, preventing arcing and power loss.
Material quality varies by grade:
RP Electrodes (300–400mm): Medium-purity coke (sulfur <0.5%), resistivity 60–80 μΩ·m, suited for mid-sized EAFs (100–200 tons).
HP Electrodes (400–500mm): Low-sulfur coke (sulfur <0.3%), resistivity 50–60 μΩ·m, ideal for large EAFs (200–250 tons).
UHP Electrodes (500–700mm): Ultra-low-sulfur coke (sulfur <0.2%), resistivity <50 μΩ·m, reserved for mega-EAFs (300+ tons).
All grades undergo rigorous testing: tensile strength (>8 MPa for RP, >12 MPa for UHP), flexural strength (>10 MPa), and oxidation resistance (accelerated aging tests). Nipples are precision-machined to match electrode threads, ensuring torque stability (up to 5,000 N·m) during installation.
In an era of decarbonization, 300–700mm graphite electrodes with nipples drive efficiency in EAFs, making them a cornerstone of sustainable steel production.
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