Process for controlling the stirring energy delivered by a gas flowing through a liquid
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United States of America Patent
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Jul 24, 2001
Grant Date -
N/A
app pub date -
Mar 18, 2000
filing date -
Mar 19, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A process for stirring molten steel in a container. In this process, argon gas is introduced into the container at a flow rate of from about 0.005 to about 0.2 cubic feet of argon per ton of molten steel per minute, the extent to which said container is caused to vibrate is measured, analog signals are produced corresponding to the rate of flow of argon gas into said container, the analog signals are sampled at a rate of at least 800 times per second, the analog signals are converted to digital signals, the digital signals are transformed by subjecting them to fast Fourier transformation, and the transformed digital signals are evaluated.
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