Electric arc furnace electrodes

An electrode for an arc furnace comprising a refractory clad column having dependent therefrom a number of inter-connected graphite sections, said column including a pair of centrally disposed water-cooled bus tubes and a metallic water-cooled tubular structure surrounding, spaced from and electrically insulated from the bus tubes, said bus tubes being connected to a conductive screw-threaded member to which one of said graphite sections is secured, that section, together with the other(s), being secured to one another through nipples having screw threads of the same size as that of the said member.

An electrode for an arc furnace comprising a plurality of elongated graphite sections secured to one another by screw-threaded nipples, water-cooled tubular structure surrounding the said sections and insulating inserts at each end of the structure by which the structure is spaced from said sections, the structure being secured to the arc furnace through which it depends, a movable electrode clamp to which the graphite sections are secured by which the sections may be periodically advanced through said structure and said structure including inlet and outlet ports by which an inert gas is transmitted through the spacing between said structure and said sections.

An electrode for an arc furnace comprising a plurality of elongated graphite sections secured to one another by screw-threaded nipples, a water-cooled tubular structure surrounding the said sections and insulating inserts at each end of the structure by which the structure is spaced from the said sections, a holder to which the said structure is secured, an associated clamp for the graphite sections by which the sections may be periodically advanced through said structure and said structure including inlet and outlet ports by which an inert gas is transmitted through spacing between said structure and said sections.