Coaxial electrode assembly having insulating spacers

Details Coaxial electrode assembly having insulating spacers Coaxial electrode assembly having insulating spacers

1998-12-23

2000-06-13

Hoang, Tu Ba

Industrial electric heating furnaces

Arc furnace device

Electrode

373 82, 373 92, H05B 706

Patent

active

060758066

ABSTRACT:
In an arc furnace or melter furnace employing concentric graphite inner and outer electrodes, the accumulations of tolerances, distortion and mechanical forces can cause a loss of concentricity leading to reduced performance and eventually to electrode degradation. To avoid that condition, a plurality of insulating spherical or cylindrical spacers are disposed in the annular gap between the inner and outer electrodes. The spacers are held in position by arcuate recesses in the outer surface of the inner electrode or in the inner surface of the outer electrode. The electrodes may be constructed in segments that are assembled by threading one segment into another segment.

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