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Electrode immersion depth determination and control in electroslag remelting furnace

United States Patent

February 20, 2007
View the Complete Patent at the US Patent & Trademark Office
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An apparatus and method for controlling an electroslag remelting furnace comprising adjusting electrode drive speed by an amount proportional to a difference between a metric of electrode immersion and a set point, monitoring impedance or voltage, and calculating the metric of electrode immersion depth based upon a predetermined characterization of electrode immersion depth as a function of impedance or voltage.
Melgaard; David K. (Albuquerque, NM), Beaman; Joseph J. (Austin, TX), Shelmidine; Gregory J. (Tijeras, NM)
Sandia Corporation (Albuquerque, NM)
10/ 853,477
May 25, 2004
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The Government has rights to this invention pursuant to Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy.