Immersion nozzle for introducing liquid metal into a continuous casting mould

摘要

A nozzle (1) for introducing liquid metal into a continuous casting mould of the type incorporates a primary tubular part (2), one end of which is destined to be connected to a vessel containing the liquid metal and the other end (4) of which emerges into a secondary hollow part (6), of which at least a part (29) of the inner space (7) is oriented essentially perpendicular to the primary tubular part (2). The part (29) of the inner space (7) incorporates at each of its ends at least one orifice (10,11) destined to open out into the casting space of the mould. Characteristically it incorporates an obstacle placed in the path of the liquid metal inside the primary tubular part (2) or in its prolongation. The obstacle is made up of at least one perforated component designed to deviate the metal from its preferential trajectory inside the nozzle. The obstacle may take the form of a lozenge perforated with a multiplicity of holes or a hollow component, fitted with a bottom part, penetrating into the second part of the nozzle, the hollow component incorporating some openings in its lateral wall.