Patent ID: 6336575
Filing Date: 2002-01-08
Classification: B22D

Abstract:
An immersion nozzle of a metallurgic vessel which is arranged upstream of a continuous casting mold and which is constructed as a single-piece structural component part, comprising a mouth area with a slit-shaped pour-out opening whose length is several times greater than its width, the immersion nozzle having a base and a side wall, and a cylindrical shape with one of a circular, oval and bone-shaped cross-sectional shape, the slit-shape pour-out opening being a continuous slit extending in the base and the side wall, the base being one of: dish-shaped and formed of two hollow sphere quarters which are arranged on either side of the slit-shaped opening; and leveled at both sides of the slit-shaped opening and having inclinations inclined toward a principal axis at an angle &agr;, where &agr;=from 30 to 70Â°, the slit-shaped opening having at least one area with a width (b), where b=0.075 to 0.15Ã— radius, the slit-shaped opening having one of a widening and narrowing in a mouth center with a width different than width (b), and further comprising a sleeve arranged to surround the immersion nozzle, the sleeve having a height greater than 0.5 Â·da, where da is an outer diameter of the immersion nozzle, and means for displacing the sleeve so that a part of slit areas extending in the side wall of the immersion nozzle can be covered.