Nondestructive Evaluation of Multiply Connected Electrical Arc Furnace Graphite Rod Electrodes

The low quality of graphite electrodes in a small electrical arc furnace causes many problems on furnace operation. High temperature and erosion at the remote electrode tip, and defects in the electrode increase the probability of electrode failure due to ageing phenomena such as thermal stress cracking. Most measurement techniques cannot determine the electrode quality under such conditions as the high temperature is highly destructive to the …