Patent ID: 6673305
Filing Date: 2004-01-06
Classification: C21C,C22B,F27B,F27D

Abstract:
Apparatus for injecting gas into a vessel, including:a gas flow duct extending from a rear end to a forward end from which to discharge gas from the duct; an elongate central tubular structure extending within the gas flow duct from its rear end to its forward end; a plurality of flow directing vanes disposed about the central tubular structure adjacent the forward end of the duct to impart swirl to a gas flow to the forward end of a duct, the forward end of the central structure and the forward end of the duct co-acting together to form an annular nozzle for flow of gas from the duct with swirl imparted by said vanes; cooling water passages within the central tubular structure for flow of cooling water forwardly through the central structure from its rear end to its forward end and to internally cool that forward end and thence to return back through the central structure to its rear end.