Working Principle and Application of Medium Frequency Induction Furnace

The working principle of the medium frequency induction furnace is to convert electrical energy into heat energy using the principle of electromagnetic induction.

When the medium frequency power supply provides medium frequency alternating current to the induction coil, an alternating magnetic field will be generated around the coil. The metal charge placed in the coil will generate an induced electromotive force under the action of the alternating magnetic field, thereby forming a closed induced current (eddy current) inside the metal charge.

Since the metal charge itself has resistance, Joule heat will be generated when the eddy current passes through the resistance, causing the metal charge to heat up rapidly until it melts. The medium frequency induction furnace has the following applications:

1. Casting industry
   Used to smelt various cast irons, cast steels, non-ferrous metals, etc., to provide high-quality molten metal for casting production.
   
2. Iron and steel industry
   Operations such as heat preservation and alloying of molten steel during steelmaking.
   
3. Machinery manufacturing industry
   Produce blanks for various mechanical parts.
   
4. Non-ferrous metal processing
   Smelt and refine non-ferrous metals such as copper, aluminum, zinc and their alloys.
   
5. Scrap metal recycling
   Melt and recycle scrap metal to achieve resource recycling.
   
   Medium frequency induction furnace has the advantages of fast melting speed, high efficiency, easy temperature control, less metal burning loss and less environmental pollution. It has been widely used in modern industrial production.