Induction Furnace Steel & Steelmaking

Induction Furnace Steel & Steelmaking

An induction furnace is a type of steelmaking furnace that uses electrical energy to operate. Induction furnace steelmaking is one of two electric furnace steelmaking processes. Another EAF steelmaking process uses an electric arc furnace (EAF).

Despite the long history of induction furnaces, the phenomenon of induction furnaces producing mild steel is relatively new. It is still widely demanded by customers all over the world.

As we know, the principle of medium frequency induction furnace is that the high-voltage power source from the primary coil induces low voltage and high current in the metal or secondary coil. The IF utilizes the heat generated by eddy currents generated by high-frequency alternating fields. The alternating magnetic field generated by the high-frequency current induces a strong eddy current in the charge, thereby rapidly heating to melt the metal.

Characteristics of induction furnace steel

Induction furnaces are mainly and commonly used in the smelting industry. 

There are two types of IF: cored induction furnace and coreless induction furnace

A cored IF consists of a refractory-lined steel shell containing molten metal.

Attached to the steel shell and connected by the throat is an induction unit which forms the melting part of the furnace. The induction unit consists of a toroidal iron core on which the primary induction coil is wound. This assembly forms a simple transformer where the molten metal loop contains the secondary components. The heat generated within the loop circulates the metal into the main shaft of the furnace.

The circulation of the molten metal induces agitation in the melt.

It is usually used to melt low melting point alloys, or as a heat preservation and overheating device for high melting point alloys (such as cast iron).

The heart of a coreless IF is the coil, which consists of a hollow section of heavy, highly conductive copper tubing wound in a helical coil.

The coil shape is contained within a steel shell and uses magnetic shielding to prevent heating of the support shell. To keep it from overheating, the coils are water cooled and the water is recirculated after being cooled in a cooling tower. The casing is supported on trunnions on which the furnace is tilted to facilitate pouring. The crucible is formed by pounding granular refractory material between a coil and a hollow inner former which melts on first heating, leaving a sintered lining.

Whether it is cored or coreless induction furnace steel, Xi'an Hani is committed to providing quality, guaranteed and serviced electric furnaces to every demander.

If you have any needs, please feel free to contact us.

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