Method for refining molten metal bath to control nitrogen
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United States of America Patent
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Oct 7, 1986
Grant Date -
N/A
app pub date -
Apr 30, 1985
filing date -
Apr 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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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