Method for refining molten metal bath to control nitrogen

Details Method for refining molten metal bath to control nitrogen Method for refining molten metal bath to control nitrogen

C - Chemistry, Metallurgy

21

C

53/87

C21C 7/068 (2006.01) C21C 5/00 (2006.01)

Patent

CA 1243490

ABSTRACT OF THE DISCLOSURE A method for refining a molten metal bath is provided including introducing a refining gas containing substantially a combination of oxygen and nitrogen to the molten bath to reduce the carbon content of the bath to a selected level; thereafter an inert gas, such as argon, is introduced to the molten bath from a lance adapted to direct the inert gas onto or beneath the bath surface, whereby the inert gas serves to efficiently remove nitrogen from the bath.

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