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.