Patent ID: 7077343

Claim:
An immersion nozzle for a metallurgic vessel comprising: an inlet end; and an outlet end having a base area, and a slit-shaped pour-out opening in the base area, the slit-shaped pour-out opening having a length several times greater than its width, wherein the immersion nozzle has a cross section that widens, in a direction of the outlet end, from a round inlet cross section having a semiaxis at the inlet end to a mouth cross section at the outlet end, the mouth cross section having a shape of one of an ellipse, a rhombus, and a combination of a circle and an ellipse, the mouth cross section further having a first semiaxis smaller than the semiaxis of the round inlet cross section, and a second semiaxis perpendicular to the first semiaxis, the second semiaxis being greater than the semiaxis of the round inlet cross section, and wherein from the mouth cross section to the base area the immersion nozzle has a shape corresponding to that of a body of revolution of an ellipse or of an oval cross section around the second semiaxis, and the slit-shaped outlet opening extends along the second semiaxis.