Patent ID: 8366992
Filing Date: 2013-02-05
Classification: C21B,C21C,F27B,F27D,Y02P,Y10T

Abstract:
1. A lance 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 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 structure adjacent the forward end of the duct to impart swirl to a gas flow through the forward end of the duct; cooling water supply and return passages extending through the wall of the gas flow duct and extending from the rear end to the forward end of the gas flow duct for supply and return of cooling water to the forward end of the duct; and an annular duct tip disposed at the forward end of the duct and having an internal cooling water passage connecting with the cooling water supply and return passages so as to receive and return a flow of cooling water to internally cool the duct tip; wherein the lance is made of three modules releasably fastened together by releasable fasteners, said modules comprising: