GB1320680A - Easily repairable gas injection lance - Google Patents

Abstract

1320680 Gas lances BERRY METAL CO 26 July 1971 34958/71 Heading F4B An oxygen injection lance 1 includes a lance top adapter assembly 100, a nozzle head 102 and preferably three concentrically positioned pipes 55, 56 and 57. Lance top adapter assembly 100 includes upper plate member 7, a centre plate member 8, a lower plate member 6, bolt and nut and lock washer combinations 40, connecting pipe body member 45, water inlet pipe member 17, bushing sleeve 5, piston sleeve 13, bushing member 15, 0-ring members 33-36, pipe space connector 14, pipe sleeve member 16, pipe reducer member 30, base-plate member 9, retainer plate member 10, quick disconnect plate member 19, connector pipe body member 21, bottom plate member 20, and pipe member 18. At least the centrally positioned pipe is axially movable independently of the intermediate and outer pipes. Safety means are provided for venting to the atmosphere any leaking oxygen or oxygen-containing mixtures. In operation of the lance 1 in a basic oxygen furnace, the oxygen is passed from lance 1 into the furnace through pipe reducer member 30, pipe sleeve member 16, bushing member 15, centrally positioned pipe 55 and then through the exit ports of nozzle head 102. The coolant fluid water enters lance 1 through water inlet pipe member 17 and passes into annular passageway 165, through nozzle head 102 and then through annular passageway 166 and exits through exit pipe member 18.