Abstract: The invention relates to a device for injecting gas into a metallurgical vessel, comprising a blowing head (5) having a feed line (5b) for delivering gas, in particular oxygen, to the blowing head (5), and at least one Laval nozzle (1) disposed on the blowing head (5), said nozzle having an inlet section (2) which conveys the gas and an outlet section (3), wherein the gas is delivered to the inlet section (2) via the feed line (5b) and leaves the outlet section (3) at supersonic speed, wherein the Laval nozzle (1) comprises at least one first nozzle part (2, 3) and a second nozzle part (7), wherein the nozzle parts (2, 3, 7) are adjustable relative to one another by changing the geometry of the Laval nozzle (1).

Abstract: An ultrasonic nozzle for use in metallurgical installations, in particular for the top blowing of oxygen in a Basic Oxygen Furnace (BOF) or an electric arc furnace (EAF), has a convergent portion and a divergent portion, which are adjacent to each other at a nozzle throat, wherein the ultrasonic nozzle is defined by the following group of nozzle forms in a respective design case: Radius in Volumetric flow narrowest cross- Outlet max. nozzle Pressure rate V0 in Nm/ section r* in mm radius re length 1 p0 in bar min (throat) in mm in mm 4 20 12.0 14.0 ?50 ± 20 4 200 39 44.0 160 ± 20 14 20 6 10.0 ?50 ± 20 14 200 21 33.0 ?160 ± 20.

Abstract: The invention relates to a supersonic nozzle for use in metallurgical installations, in particular for the top blowing of oxygen in a Basic Oxygen Furnace (BOF) or an electric arc furnace (EAF), comprising a convergent portion and a divergent portion, which are adjacent to each other at a nozzle throat (DK), wherein the supersonic nozzle is defined by the following group of nozzle forms in the respective design case thereof: (T1).

Abstract: The invention relates to a device for injecting gas into a metallurgical vessel, comprising a blowing head (5) having a feed line (5b) for delivering gas, in particular oxygen, to the blowing head (5), and at least one Laval nozzle (1) disposed on the blowing head (5), said nozzle having an inlet section (2) which conveys the gas and an outlet section (3), wherein the gas is delivered to the inlet section (2) via the feed line (5b) and leaves the outlet section (3) at supersonic speed, wherein the Laval nozzle (1) comprises at least one first nozzle part (2, 3) and a second nozzle part (7), wherein the nozzle parts (2, 3, 7) are adjustable relative to one another by changing the geometry of the Laval nozzle (1).