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AssigneeIrsid
InventorsJacques Michelet, Ghislain Maurer
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The device according to the invention consists mainly of: an inner part passing through the wall of the furnace and comprising a metal core 7 extended by a cooled plug 10, the free end of the core opposite to the plug being in contact with the molten mass of metal present in the furnace, a sleeve 11 made of thermally conductive material, which is cooled as a result of the circulation of a cooling fluid and which surrounds the core 7, and means 29 of connecting the metal core 7 to an electrical supply. The device according to the invention is characterized in that it also presents a separation space 12, formed between the sleeve 11 and the metal core 7, and an elastic fastening system 33, 34, 35 tending to return the said core 7 to its initial position given by assemblage. The device according to the invention is advantageously used as a hearth electrode in direct-current arc furnaces, specially for the iron and steel industry.
In an electrical connection device placed through the wall of an electrical direct-current metallurgical arc furnace an inner part consisting of a metal core (7) which at one end is flush with the inner surface of said vessel and at its other end and at its other end is extended in the form of a plug (10) integral therewith, a sleeve (11) of thermally conductive material which surrounds said inner part (7,10), is fastened to a shell (2) of said furnace, and has a cooling-fluid circulation circuit (13), and means (20,31) connecting said metal core to an electrical supply, the improvement comprising
Dependencies are inferred from the claim text.