ULTRASONIC NOZZLE FOR USE IN METALLURGICAL INSTALLATIONS AND METHOD FOR DIMENSIONING AN ULTRASONIC NOZZLE

摘要

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.