Principle and Classification of Induction Furnace

The main components of induction furnace are inductor, furnace body, power supply, capacitor and control system. Under the action of the alternating electromagnetic field in the induction furnace, the material generates eddy current and heats up and melts. Under the stirring action of this alternating magnetic field, the composition and temperature of the melt in the furnace are relatively uniform, and the melting temperature can reach 1650 ℃. In addition to smelting in the atmosphere, induction furnaces can also be smelted in vacuum and argon, neon and other protective atmospheres to meet special quality requirements.

Induction furnaces have outstanding advantages in melting soft magnetic alloys, high resistance alloys, platinum group alloys, heat-resistant, corrosion-resistant, wear-resistant alloys and pure metals.

Induction furnace is usually divided into cored induction furnace and coreless induction furnace two categories. The cored induction furnace has an iron core passing through the inductor and is powered by a power frequency power supply. It is mainly used for smelting and heat preservation of various cast iron, brass, bronze, zinc and other metals. The electrical efficiency is over 90%, waste furnace materials can be used, the smelting cost is low, and the maximum furnace capacity is 270 tons. Coreless induction furnace coreless through the inductor, divided into frequency induction furnace, triple frequency induction furnace, generator set medium frequency induction furnace, thyristor medium frequency induction furnace, high frequency induction furnace.