How Do Electric Induction Furnace Work?

How do electric induction furnace work?

Generally, the heating furnaces we are familiar with use electricity as the energy source, but the heating method of the induction furnace is a little different from other furnaces. Although it is also driven by electricity, it uses induction heating to heat the material. of. So what is its working principle and characteristics, and what is its use? I believe that many friends are still relatively unfamiliar with the structure of this device, so Hani Metallurgy will introduce it to you in the article.


Working principle of induction furnace

how do electric induction furnace work? In an induction furnace, there is an induction coil that creates an alternating magnetic field when it is energized with alternating current. The metal charge to be heated is placed in an alternating magnetic field, and an electric current is generated in the metal charge due to electromagnetic induction. Due to the resistance of the metal charge, the metal charge will be heated when the current passes through it. The induction furnace mainly uses this heat to heat and melt the metal charge.

For induction heating to take place, two basic conditions must be met:

The first is to use alternating current; the second is that the object to be heated must be a metal material.

In an induction furnace, the power transmitted to the metal charge is proportional to the resistivity of the metal charge, and the heating effect of high resistivity metal materials (cast iron, steel, etc.) is better than that of low resistivity metal materials (such as copper, aluminum); ferromagnetic materials It has a better heating effect than non-ferromagnetic materials.


After understanding how do electric induction furnace work, what are its characteristics as a heating equipment widely used in the metal smelting industry?

1.The central control circuit of the induction furnace optimizes the design of the combined unit circuit board. The equipment has stable performance, reliable quality and strong anti-interference ability.

2.The component layout is coordinated and reasonable, and the maintenance is convenient. Highly integrated circuit solution, commissioning and operation of steel pipe quenching and tempering furnace is fast, simple and easy to learn.

3.On the basis of zero pressure, automatic start-up scanning is added, repeated start-up, voltage and current loops are closely tracked, the induction furnace starts and stops at any time, and there is no current impact.

4.The trigger circuit sensitive to the start signal of the inverter uses a signal, which further improves the start performance of the induction furnace, and the start success rate is 100%.

5.The constant power circuit control system of the induction furnace will be a high-quality automatic control device for rapid changes in charging voltage and current during production, without manually adjusting the cut-off angle of the inverter.

6.It has a complete protection system for overvoltage, overcurrent, voltage, water shortage, and voltage limit, which ensures the reliability and operation stability of the induction furnace.


1.Heat treatment: partial or overall quenching, annealing, tempering and diathermy of various metals;

2.Thermoforming: whole piece forging, partial forging, hot heading, hot rolling;

3.Welding: brazing of various metal products, welding of various knife blades and saw blades, welding of steel pipes and copper pipes, welding of the same and different metals;

4.Metal smelting: (vacuum) smelting, casting molding and evaporation coating of gold, silver, copper, iron, aluminum and other metals;

5.Other applications of high-frequency heating machine: semiconductor single crystal growth, thermal fit, bottle mouth heat sealing, toothpaste skin heat sealing, powder coating, metal implanted plastic, etc.

Generally, induction furnaces produced and supplied by HANI are mainly used for heat treatment, metal melting and so on. Induction melting furnaces are mainly used for smelting and heat preservation of special steel, cast iron, non-ferrous metals and their alloys, and are demanded by more steel mills.

The above is the knowledge sharing about how do electric induction furnace work. We will continue to export the relevant knowledge of the metal smelting industry. Welcome to continue to pay attention to us.

No matter what kind of induction melting furnace, Hani Metallurgy will provide suitable, professional, efficient and low energy consumption induction furnace to each customer according to the specific raw materials and melting requirements.

Any needs about induction furnace, EAF, SAF, LF, etc., please feel free to contact us.