System and method for minimizing slag carryover during the tappi

Details System and method for minimizing slag carryover during the tappi System and method for minimizing slag carryover during the tappi

1997-11-13

1999-10-19

Kastler, Scott

Specialized metallurgical processes, compositions for use therei

Processes

Process control responsive to sensed condition

266 93, 266 99, C21C 528

Patent

active

059682272

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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