Eaf Graphite Electrodes 100-750mm

Graphite Electrode Product Parameters

EAF graphite electrodes (100–750 mm) are specialized conductive tools engineered to thrive in the harsh, high-energy environment of Electric Arc Furnaces, where they are indispensable for melting, refining, and maintaining molten steel.

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Operational Role​​: In EAFs, these electrodes act as the primary current carriers, with the electrode tip descending into the furnace to form an arc between the graphite and the metal bath. This arc generates 3,000°C+ heat, sufficient to melt even large scrap heaps. Beyond heating, they stabilize the arc (preventing extinguishing during scrap charging) and facilitate chemical reactions: for example, in desulfurization, the electrode's current induces a magnetic field that stirs the bath, enhancing contact between slag (containing CaO) and molten steel (rich in S), accelerating sulfur removal.

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Design & Material Science​​: The 100–750 mm size range is optimized for EAF efficiency: smaller diameters (100–300 mm) suit smaller furnaces (20–50 tons) with lower power demands, while 500–750 mm electrodes are standard for 100–300-ton EAFs, where they support 80–120 kA currents. Graphite's low thermal expansion coefficient (2–4 × 10⁻⁶/°C) prevents cracking under thermal stress, and its high purity (sulfur <0.05%) avoids metal contamination. Advanced manufacturing techniques like vacuum impregnation (with phenolic resin) reduce porosity (<12%), enhancing resistance to slag corrosion-a major cause of electrode degradation.

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