The Ajax-Wyatt electric furnace is a vertical ring type induction furnace. An induction furnace is actually simply a transformer with a single secondary step.
The specifications for an ideal electric melting furnace are laid out and operational data are presented to show that the vertical ring induction furnace complies more with these specifications than any other type of furnace. With this furnace, thermal efficiencies of up to 85% have been obtained. There are few high energy consumption devices that have a smooth operating curve such as the vertical ring induction furnace. The stirring action is due to the combined effects of motor, pinch and joule. The power input of the vertical ring induction furnaces varies from 45 kw. At 150 kw. And the pouring capacity is 400 to 2,200 lbs (180-1,000 kg) per heat. The single phase is preferable to the poly-phase because of its extreme simplicity.