Cooled bottom electrode for a direct current electric furnace

摘要

A cooled bottom electrode for a direct-current electric furnace includes one or more steel bars incorporated in a refractory hearth of the furnace and having at least its upper end in contact with the bath of molten metal within the furnace, at least a first upper liquid part and at least a second lower solid part being defined along the steel bar and being divided by a separation zone, the lower solid part being associated with cooling elements. The cooling elements are copper cooling means elements introduced in cooperation with the solid part of the steel bar and being inserted at least therewithin and extending at least partly within the bar and towards the inside of the furnace. The copper cooling elements cooperate with a cooling-water system positioned below the bar and in cooperation therewith.