Patent ID: 9222144
Filing Date: 2015-12-29
Classification: C21C,F27D,Y02P

Abstract:
1. Apparatus injecting gas of 1100 to 1400° C. into a metallurgical vessel, comprising: a gas flow duct extending from a rear end to a forward end and discharging the gas from the forward end; an elongate central structure having a rear end and a forward end and extending within the gas flow duct from its rear end to its forward end; a plurality of flow directing vanes disposed about the central structure adjacent the forward end of the duct and imparting swirl to the gas flow through the forward end of the 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 the vanes; cooling water flow passages within the vanes through which flow passages cooling water flows to cool the vanes; and cooling water supply passage means and return passage means within the central structure for supply of cooling water from the rear end of the central structure to the water flow passages in the vanes and returning the cooling water from the flow passages in the vanes to the rear end of the central structure; wherein the vanes have spaced apart side walls that are made of steel.