Patent ID: 8113391
Filing Date: 2012-02-14
Classification: B22D

Abstract:
1. An immersion nozzle for continuous casting comprising: a tubular body with a bottom, the tubular body having an inlet for entry of molten steel disposed at an upper end and a passage extending downward from the inlet and being depressed in cross section at least at a lower section, the lower section having two narrow sidewalls and two broad sidewalls, the broad sidewalls being wider than the narrow sidewalls; a pair of opposing first outlets disposed in the narrow sidewalls of the lower section so as to communicate with the passage; and a pair of second outlets disposed in the bottom so as to communicate with the passage, wherein the lower section has ridges horizontally projecting into the passage from inner surfaces of the broad sidewalls between the pair of first outlets, wherein the pair of second outlets are disposed symmetrically about an axis of the tubular body, wherein each of the second outlets has an axis passing therethrough, respectively, and wherein the respective axes that pass through the pair of second outlets cross each other in the passage.