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Waveform Analysis of Electric Furnace Arcs as a Diagnostic Tool.

Ochs TL; Hartman AD; Witkowski SL

MISSING :19 pages

10005245

The Bureau of Mines is investigating the fundamental behavior of electric arcs in electric-furnace operations. The electric arc is a poorly understood phenomenon. If the arc in a steelmaking furnace can be more carefully controlled, it should be possible to increase heat transfer to the melt, reducing both electrical and acoustical noise. As a first step toward a better understanding of the arc, voltage and current signals from operating furnaces were analyzed. The results of the initial analysis show that instrumentation used in monitoring and controlling furnaces, such as meters and strip- chart recorders, gives incomplete or erroneous information to the operator and leads to less than optimal control. Advanced instrumentation and analysis techniques, such as the waveform analysis used in these investigations, can improve the understanding of operation and the control of electric furnaces. This report describes the instrumentation and the numerical analysis methods used and compares these methods with standard metering and recording techniques.

19860101

IH; Report of Investigations

1986

RI 9029

ALRC;

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