FIELD: metallurgy. SUBSTANCE: D. C. arc furnace has body with roof, graphitized and hearth electrodes passed through roof and hearth to which power supply source is connected electrically coupled to current regulator. Water-cooled units are installed on metal shell of body and on roof. Current conducting element and electric insulator are passed through hearth. Current pickup linked to current regulator is connected to current conducting element. Grounding circuit is coupled to body and current pickup. EFFECT: improved reliability and efficiency of plant. 1 dwg
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