Reach customers worldwide with tripolar structure in Japan, the US and EuropeSalesTokyoNagoyaOsakaUnited StatesGermanyCustomersWhat are Graphite Electrodes?Did you know that there are two ways to make iron? The blast furnace method and the electric arc furnace method. The electric arc furnace method recycles used iron scrap by melting it in an electric arc furnace. It is the graphite electrodes inside the furnace that actually melt the iron. Graphite has high thermal conductivity and is very resistant to heat and impact. It also has low electrical resistance, which means it can conduct the large electrical currents needed to melt iron. In recent years, graphite electrodes have been made even more efficient: they can now conduct even higher currents and more power. Using the expertise collected over a century of innovation, Tokai Carbon has developed the world's biggest electrodes. They measure 32 inches (about 80 cm) in diameter and are 3 meters long. Tokai Carbon's graphite electrodes are made to last, making them a trusted name in the industry.Graphite Electrodes Division Basic informationMain Raw MaterialsSteel manufacturers(electric arc furnace steelmaking)Needle coke and pitch are mixed and then molded. Heat treatment is then applied in the baking and graphitization process to form the finished product.Manufacturing ProcessKneading/extrusion bakingPrimary baking(1 month)Pitch impregnation(Few days)Secondary baking(2 to 4 weeks)Graphitization - MachiningFinished product - ShippingAnnual production capacityJapan38,000tUnited States30,000tGermany28,000tHead Office (Tokyo), overseeing global salesSales and technical service network covering all of Europe and the AmericasNeedle cokeNeedle-like crystals develop.Low thermal expansion coefficient.PitchProduced by heat treatment of coal tar.Carbonizes under heat (50% yield).For DC Furnaces (direct current furnaces) For AC Furnaces (alternating current furnaces) For LF Furnaces (rening furnaces) 56TOKAI CARBON ANNUAL REPORT 2018
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