Exothermic and Resistance Starting Techniques for Use in the Electroslag-Refining Process,

摘要

Cold-starting techniques for use with the experimental electroslag-refining furnace at MRL have been examined. Two cold-starting devices based on exothermic reactions and resistance-heating, respectively, have both been developed to the stage where reliable starting can be achieved. A common feature of these devices is that they are readily attached to the end of the consumable electrode. Although the exothermic device produced faster starts, some contamination of the ingot resulted from its use. The exothermic device also resulted in the formation of worm-hole porosity in the first 25 mm of ingot length. Ingots produced with the resistance device were free from both these forms of contamination and, therefore, the use of this device is preferred for the experimental work at MRL. (Author)