Metallurgical furnace having a blast injection nozzle
AssigneeAllmanna Svenska Elektriska Aktiebolaget
InventorsKare Folgero, Lars-Gunnar Norberg, Karl-Erik Oberg
Life of this patent
Estimating the term…
Abstract
A metallurgical furnace has a wall contacted by molten metal and having a nozzle opening below the level of the metal, a nozzle positioned in this opening forms a passage for injecting a blast into the metal, and this nozzle has means for liquid-cooling the outer end of its blast passage to freeze the molten metal when flowing backwardly through the nozzle's passage in the event of a blast failure. In such an event, the frozen or solidified metal forms a stopper for the nozzle's passage.
Claims5
A metallurgical furnace having a wall with an inside contacted by molten metal, the wall having a nozzle opening, and a nozzle in said opening and forming a passage for injecting a blast into said metal, said nozzle having means for liquid-cooling the outer end of said passage to freeze said metal when flowing backwardly through the passage in the event of a blast failure, said nozzle opening and nozzle being conical and the nozzle being removable from the opening, the nozzle comprising a metal conical shell having an outer flange for connection with the outside of the vessel's said wall, said flange having an opening into said shell and through which a fluent refractory material can be injection molded into the shell, a pipe extending longitudinally through the shell and flange forming a blast passage.
Dependencies are inferred from the claim text.