Dia 400mm & 350mm Graphite Electrodes with Male/Female Nipples for EAF/LF Steel Melting
In steel melting, electrode diameter and connection design directly influence furnace efficiency. The 400mm and 350mm graphite electrodes-with male/female nipples-are engineered to optimize current distribution, heat management, and operational reliability in EAFs and LF furnaces.
Diameter-Driven Performance:
400mm Electrodes: Suited for large EAFs (200–300 tons), their larger diameter minimizes current density (current per unit area), reducing heat concentration at the tip. This slows oxidation and extends service life to 50–60 heats. Resistivity ranges from 50–70 μΩ·m (HP/UHP grades), balancing conductivity and cost.
350mm Electrodes: Ideal for mid-sized EAFs (100–200 tons) and LF units, 350mm electrodes offer a cost-effective alternative. Their smaller diameter reduces material usage while maintaining adequate current capacity (60–100 kA), making them popular in regional mills.
Nipple Connection Critical: Male/female nipples ensure secure, torque-stable connections (up to 5,000 N·m) between electrodes and furnace infrastructure. The 400mm/350mm diameter nipples are precision-machined to match electrode threads, preventing leaks or arcing-common issues that disrupt power flow.
Thermal Resilience: Both diameters use dense carbon structures (density >1.75 g/cm³) and low porosity (<10%) to withstand thermal cycling (up to 3,000°C). UHP grades (400mm) feature silicon carbide coatings for added oxidation resistance, extending lifespan in high-temperature environments.
In EAFs, 400mm electrodes enable faster melting of large scrap charges, while 350mm electrodes optimize mid-sized operations. For LF furnaces, their consistent current flow ensures uniform alloying. Together, these electrodes drive efficiency in steel melting, proving that size and connection design are key to industrial success.
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