Induction furnace

[1][2][3] Induction furnace capacities range from less than one kilogram to one hundred tons, and are used to melt iron and steel, copper, aluminum, and precious metals.

A channel-type induction furnace has a loop of molten metal, which forms a single-turn secondary winding through an iron core.

[7][8] An induction furnace consists of a nonconductive crucible holding the charge of metal to be melted, surrounded by a coil of copper wire.

Generally, the smaller the volume of the melts, the higher the frequency of the furnace used; this is due to the skin depth which is a measure of the distance an alternating current can penetrate beneath the surface of a conductor.

Power supplies range from 10 kW to 42 MW, with melt sizes of 20 kg to 65 tons of metal respectively.