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Method and apparatus for off-gas composition sensing

United States Patent

5,984,998
November 16, 1999
View the Complete Patent at the US Patent & Trademark Office
An apparatus and method for non-intrusive collection of off-gas data in a steelmaking furnace includes structure and steps for transmitting a laser beam through the off-gas produced by a steelmaking furnace, for controlling the transmitting to repeatedly scan the laser beam through a plurality of wavelengths in its tuning range, and for detecting the laser beam transmitted through the off-gas and converting the detected laser beam to an electrical signal. The electrical signal is processed to determine characteristics of the off-gas that are used to analyze and/or control the steelmaking process.
Ottesen; David Keith (Livermore, CA), Allendorf; Sarah Williams (Fremont, CA), Hubbard; Gary Lee (Richmond, CA), Rosenberg; David Ezechiel (Columbia, MD)
American Iron and Steel Institute (Washington, DC)
08/ 970,826
November 14, 1997
NOTICE OF GOVERNMENT INTEREST The Government of the United States of America has rights in this invention pursuant to Cooperative Agreement No. DE-FC07-93ID13205 awarded by the U.S. Department of Energy.