System and method for minimizing slag carryover during the taping of a BOF converter in the production of steel
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United States of America Patent
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Oct 10, 2000
Grant Date -
N/A
app pub date -
Aug 20, 1999
filing date -
Nov 13, 1997
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Abstract
A system and method for detecting molten slag in a tap stream between a steel making basic oxygen furnace (BOF) and corresponding ladle. BOFs are used in the manufacture of steel. An infrared (IR) imaging or detecting device is used to image/view the BOF-to-ladle tap stream, the steam transmitting energy indicative of whether molten steel and/or slag is in the stream at a given time. The imaging device uses mainly long IR wavelengths (e.g. wavelengths of from about 8 to 14 .mu.m) when imaging the molten tap stream, because these wavelengths are less susceptible to being blocked or absorbed by airborne gases and particles frequently found in BOF environments. In certain embodiments, all IR wavelengths other than those greater than about 8 .mu.m are filtered out and are not used to detect slag in the tap stream.
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