Process and lance for the production of a bath of molten...

Details Process and lance for the production of a bath of molten... Process and lance for the production of a bath of molten...

C - Chemistry, Metallurgy

21

C

39/105, 53/361

C21C 7/072 (2006.01) F27D 99/00 (2010.01) C22B 9/00 (2006.01) C22B 9/05 (2006.01) F27D 3/16 (2006.01) F27B 14/08 (2006.01)

Patent

CA 1276471

ABSTRACT OF THE DISCLOSURE Liquid argon, nitrogen or carbon dioxide is poured onto the surface of a bath of molten metal in a furnace. According to the invention, liquefied gas is discharged onto the surface in an amount which ranges from about 0.025 to 0.100 lb/cu.in. of metal in the furnace, or 0.01 to 0.05 lb per minute per square inch of exposed metal surface area in the furnace, while a skirt is preferably set around the open end of said furnace. Oxygen concentration above the bath remains lower than about 3.0%, while hydrogen and nitrogen pick up are reduced.

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