Km Europa Metal Ag

Christof Dratner

Hans-Günter Wobker

Thomas Rolf

Reinhard Hintemann

Franz Keiser

Frank Böert

A cooling plate () made of copper or a copper alloy for blast furnaces has a plurality of bore holes () for accommodating a cooling medium. The bore holes () are connected to a cooling medium intake () and a cooling medium outlet via connecting pipes () that are welded onto the cold side of the plate (). Connecting pipes (), at their plate ends (), are furnished with flanges () that are formed by being flanged open. These flanges () are set into recesses () in the cold side of the plate (), and are welded at their circumference by V seams () to the cold side of the plate ().

Cooling plate

A cable head, in which ends of cable cores, made of a plurality of individual stranded conductors, are inserted into the bore holes of a cable lug. The cable cores are fixed in position in the bore holes by radial pressing and deformation of the bore holes. The bore holes are located on divided circles which are concentric relative to each other, the bore holes on the inner divided circle being staggered with respect to the bore holes on the outer divided circle. Cooling-water grooves between the bore holes located on the outer divided circle extend, with a depth, into the proximity of the bore holes arranged on the inner divided circle. They are connected to a central cooling-water channel in the cable head.

Cable head of a high-current multiple cable for direct-current

An apparatus for transferring the electrical energy from a furnace transformer to the electrodes of a three-phase arc furnace held by coplanar mast arms. A mast arm for the center current phase is made of aluminum or a material with a similar permeability. The conductor of the center current phase, which is made of at least one high-current tube made of a material with good electrical conductivity, is mounted in insulated fashion in the mast arm and has a smaller geometrical diameter than the conductors for the outer current phases provided by the other two mast arms.

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Osnabruck, Germany

Christof Dratner