Electrodes are Submerged in the Submerged Arc Furnace, into the raw materials. Reason, for allowing the electrodes to reside inside the charge mix, is the high resistance of the ores. Three purposes are served :
1. The heat coming out from arcing is utilized for preheating the ore at the upper strata.
2. Ore/Coke dust from reaction gases is entrapped in the charge mix, this increases the efficiency.
3. In case of power failure, the heat is retained in the molten alloy, meaning very low heat loss to the atmosphere.
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