Oxygen blowing lance capable of being used in an electric and method for blowing oxygen onto metal by said oxygen blowing lance furnace

摘要

An oxygen blowing lance capable of directing oxygen jet streams onto a molten metal in an electric furnace (1), the lance (11,12a,12b) being insertable into the electric furnace (1) through a sidewall working port (10), the lance (11,12a,12b) being positionable above the molten metal (9) in the electric furnace (1). The lance (11,12a,12b) includes a horizontal segment (15) and an angled segment (14), the angled segment (16) being positioned on the distal portion of the horizontal segment (15) and being inclined relative to the horizontal segment (15). The lance also includes a tip (14), the tip (14) being positioned on the distal portion of the angled segment (16), with the distal portion of the tip (14) being directed toward the molten metal (9). The horizontal segment (15), the angled segment (16) and the tip (14) define an oxygen flow channel (19) and a cooling water flow channel (20). The oxygen flow channel (19) extends substantially the length of the lance, and the cooling water flow channel (20) surrounds the oxygen flow channel (19). The lance also includes a plurality of nozzles (21), each having a throat portion (22). The throat portions of the nozzles (21) being positioned on the distal portion of the tip (14). The nozzles (21) are operatively engaged with the oxygen flow channel, and at least one of the nozzles (21) is positioned nearer the molten metal (9) than the other nozzles.