DC ARC STEEL FURNACE Russian patent published in 2011 - IPC C21C5/52 C22B9/00 F27B3/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, namely, to electrothermal equipment. Proposed device comprises housing, drain chute, crown and crown electrode. Central hearth electrode is arranged in furnace hearth, aligned with hearth electrode. Two lateral hearth electrodes are arranged on both sides of central hearth electrode to allow their switching on, either in turn or combined, at the end of smelt.

EFFECT: higher efficiency, reduction in power consumption making, at least, 5-6%.

1 dwg