A mounting
enclosure and an improved mounting arrangement for apparatus used in
metal melting, refining and
processing, particularly those apparatus adapted for steel making in an
electric arc furnace, such as burners, lances and the like with supersonic
oxygen lancing capability and injectors or the like for the introduction of particulate matter. The mounting
enclosure is fluid cooled to survive the hostile environment of the
electric arc furnace and is designed to occupy the step between the side wall and
hearth of the furnace without any substantial change to the structure of the furnace. The mounting
enclosure comprises a plurality of fluid cooling conduits surrounding an apparatus aperture and an
injector aperture which are formed through the enclosure and adapted to
mount an apparatus and an
injector. The mounting arrangement includes utilizing the mounting enclosure to
mount an apparatus with supersonic oxidizing gas lancing capability and an
injector for particulate carbon in an
electric arc furnace. Because the mounting enclosure is approximately the width of the step, the
discharge openings of the apparatus and the injector are moved closer to the surface of the melt and toward the center of the furnace thereby providing increased efficiency. The
discharge openings will now be extended to near the edge of the step so that the oxidizing gas flow pattern of the apparatus does not degrade the
hearth material or other furnace equipment mounted nearby and the
carbon flow pattern of the injector sufficiently agitates the
slag to produce foaming.