Induction furnaces are increasingly used in the foundry industry today thanks to their technical and economic advantages. They bring with them numerous advantages. These include rapid operational readiness, precise temperature control, high reproducibility, short melting times, targeted bath movement of the melt, neutral furnace atmosphere and lower environmental impact. In this way, precise temperature and process control, low burn-off values and low stress at the workplace can be achieved with high uniformity and analytical accuracy at the same time. Depending on the material used and the lining of the induction furnace, induction heating is possible up to any high temperature. We divide induction furnaces into two types: Channel-type induction furnaces and Crucible-type induction furnaces. The difference is that in the channel-type furnace the energy is only transferred to the melt in the channel, which is limited. Whereas in the crucible furnace, almost the entire content is heated in the induction furnace.

What is an induction channel furnace?

The casting industry uses this type of induction furnace for holding, casting and melting different metals. These include copper and copper alloys, aluminium and some types of steel. The material inside the induction furnace is heated by a copper coil and a transformer core. The strengths of the channel-type induction furnace are: Clean and neutral atmosphere, high environmental compatibility and high thermal efficiency. These strong features make the induction furnace popular all over the world, even in its used form.

How does a crucible induction furnace work?

This type of induction furnace is used as a melting furnace, holding furnace , casting furnace and chip melting furnace. Its fields of application can be found in the grey cast iron foundry, in the non-ferrous industry (NE) and in special applications in the steel industry. Its strengths are its high flexibility, its universal range of applications, its easy power adjustment and its environmental friendliness. The body of the crucible induction furnace essentially consists of a ceramic crucible. This is surrounded on the outside by a cylindrical induction coil. The multi-winding coil is flown through by alternating current and induces a large current inside the metal in the crucible, similar to a transformer. Thanks to Joule's law, the resulting whirlwinds cause the material inside the induction furnace to heat up.

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Induction furnaces