Graphite electrode classification Ordinary power graphite electrodes are allowed to use graphite electrodes with current density less than 17A/ cm. They are mainly used in ordinary power electric furnaces for steelmaking, silicon smelting and yellow phosphorus refining.High power graphite electrodes are allowed to use graphite electrodes with current density of 18~25A/ cm 2, mainly used in high-power arc furnaces for steelmaking.Ultra-high power graphite electrode, which allows the use of graphite electrode with current density greater than 25A/ cm, is mainly used in ultra-high power steelmaking arc furnace
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