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

1985-04-30

1986-10-07

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

420 71, C21C 700

Patent

active

046157301

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.

REFERENCES:
patent: 16082 (1856-11-01), Bessemer
patent: Re29584 (1978-03-01), Heise
patent: 3891429 (1975-06-01), Cox
patent: 4260415 (1981-04-01), Simmons

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