FIELD: metallurgy.
SUBSTANCE: invention relates to the field of metallurgy. A device for heating a metallurgical tank contains one or more electrode assemblies with power sources. The electrode assembly contains a coaxially arranged external hollow electrode (2) and an internal electrode (1), electrically isolated from each other. An inert gas is fed into the cavity between the electrodes to create an overpressure, no less than the external pressure in the metallurgical tank. The external and internal electrodes have independent attachment points and movement mechanisms that provide general and independent translational and reciprocating movements. The outer electrode is provided with a hermetically sealed lid (5) at the end, and the inner electrode is designed to be moved until it comes into contact with the lid (5). Crushed electrically conductive material (6) is fed into the cavity between the electrodes to ensure the flow of electrically conductive material into the plasma arc burning zone (7) and burning of the plasma arc from the inner electrode to the electrically conductive material.
EFFECT: invention provides an increase in thermal efficiency up to 90-95%, an increase in the service life, the absence of harmful emissions into the surrounding space.
7 cl, 9 dwg
