spear for injecting gas into a vessel, apparatus for producing ferrous metal from a ferrous feed material, methods for installing and removing a spear for injecting gas into a metallurgical vessel

摘要

BOOM TO INJECT GAS IN A VASE, APPLIANCE FOR PRODUCING FERROUS METAL FROM A FERROUS FEED MATERIAL, METHODS FOR INSTALLING AND REMOVING A BOOM TO INJECT GAS IN A METALLIC VASE. A hot gas injection lance (26) for injecting hot gas into a vessel (11) is made up of three modules (26 a, 26B and 26C) which are all manufactured separately and assembled in successive steps and connected together by releasable fasteners. The lance module (26A) is a main conduit module that provides an elongate conduit (31) through which hot gas is directed to an upper region of the vessel. The boom module (26B) is a gas inlet module through which hot gas is routed into the conduit (31) of the module (26A). The boom module (26C) is a central module that includes an elongated central tubular structure (33) that extends within the gas flow duct (31) and carries at its lower end a series of swirl transmitting tubular structures (33). ) extending within the gas flow conduit (31) and carrying at its lower end a series of swirl transmitting fins (34) to transmit swirl to the gas flow leaving the conduit. The main conduit module (26A) has a mounting flange (110) that abuts a flange (122) in the vessel (11) and the flanges (110, 122) are secured to each other by bolts (121). The input module