Industrial electric heating furnaces – Electroslag remelting device
Reexamination Certificate
2007-08-14
2007-08-14
Van, Quang (Department: 3742)
Industrial electric heating furnaces
Electroslag remelting device
C373S070000
Reexamination Certificate
active
11143178
ABSTRACT:
A vacuum arc remelt furnace system that automatically monitors for electrode to crucible arcing in a VAR furnace. The vacuum arc remelt furnace system includes a crucible, an electrode provided within the crucible, and a spectrometer operatively coupled to the gap between the electrode and the crucible. The spectrometer detects the presence of one or more copper-specific light wavelengths in light that is present in the gap, and preferably generates an alarm and/or shuts the furnace down depending upon what is detected. Also, a method of operating a vacuum arc remelt furnace to automatically monitor for electrode top crucible arcing. The method includes collecting light that is present in the gap between the crucible and said electrode, and determining whether one or more copper-specific light wavelengths are present in the light. An alarm is generated and/or the furnace is shut down depending upon what is detected.
REFERENCES:
patent: 3672774 (1972-06-01), Bojic et al.
patent: 5210526 (1993-05-01), Imperiali
patent: 5621751 (1997-04-01), Williamson et al.
Griffin LaVar Ellis
Severson Lonny Dean
Van Quang
Westinghouse Electric Co LLC
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