Controlled foamy slag process
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United States of America Patent
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-
Dec 17, 1996
Grant Date -
N/A
app pub date -
Jan 19, 1995
filing date -
Jan 19, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of improving the post-combustion heat recovery in a basic oxygen furnace by controllably forming a foamy slag. The foamy slag is generated by increasing the lance height and reducing the rate of lance height reduction during the oxygen blowing cycle. The foamy slag is controlled to prevent slopping by calculating the approximate starting point of the peak decarburization period for the charge and then adjusting the oxygen flow rate to be at a minimum at the commencement of the peak decarburization period.
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