A method and an apparatus for advantageously introducing a
flame and a
high velocity oxidizing gas into a furnace for
metal melting, refining and
processing, particularly steel making in an
electric arc furnace. The steel making process of an
electric arc furnace is made more efficient by shortening the time of the
scrap melting phase and introducing an effective
high velocity oxidizing gas
stream into the process sooner to decarburize the melted
metal. In one implementation of an apparatus, improved efficiency is obtained by mounting a fixed burner / lance closer to the hot face of the furnace
refractory at an effective injection angle. This mounting technique shortens the distance that the
flame of the burner has to melt through the
scrap to clear a path to the
molten metal and shortens the distance the
high velocity oxygen from the lance travels to the
slag-
metal interface thereby increasing its penetrating power. The method additionally includes supplying a plurality of reaction zones with the high velocity oxidizing gas to decarburize the melted metal. The plurality of reaction zones increases the surface area available for the reaction thereby allowing a more
rapid rate of
decarburization and a more homogenous metal bath. The reaction zones are supplied with the high velocity oxidizing gas according to an
oxygen supply profile which is related to the carbon content of the metal bath. In this manner an optimal amount of
oxygen can be introduced into the metal bath to shorten the
decarburization process without producing excessive oxidation of the metal bath and excessive free oxygen in the furnace.