What is Induction Coil Furnace ?

The induction furnace heating coil is the main part of the induction heating of the intermediate frequency furnace. It's wound by a rectangular copper tube and has a spiral shape. It is used in conjunction with the intermediate frequency power supply.

So, what is the specific heating principle, function and structure of the induction coil furnace ‍heating coil? Next, Xi'an Hani Tech will give you a detailed introduction.

1. Induction furnace‍ coil‍ heating principle:

The frequency conversion device of the intermediate frequency power supply of the induction furnace converts the three-phase 50Hz alternating current into a single intermediate frequency current of 100Hz--8000Hz after rectification and inversion. After inputting into the intermediate frequency furnace coil, a high-density magnetic field is generated, and the magnetic field cuts the metal in the intermediate frequency furnace coil. Eddy current and self-heating, to achieve the purpose of metal heating.

2. Induction coil furnace‍ coil‍ heating‍ function:

The function of the induction furnace ‍‍heating‍coil is to make the intermediate frequency current generate a magnetic field through the intermediate frequency furnace spiral induction coil. The size and distribution range of the internal magnetic field of the intermediate frequency furnace coil is determined by the design of the induction coil. The size of the rectangular copper tube, the number of turns, and the diameter of the induction coil have a lot to do with it.

3. The structure of the induction furnace‍ coil‍ heating‍:

The induction furnace‍coil‍is made of a rectangular copper tube wound on a winding machine according to the designed copper tube specifications, diameter, and number of turns. Copper screws are welded on the coil, and bakelite columns with a certain distance between turns are installed on the copper screws. , to fix the distance between the turns of the coil and keep the shape of the intermediate frequency furnace ‍heating‍coil unchanged. Generally, the coil is sprayed with insulating varnish, wound with mica tape, wound with glass ribbon, and the insulating varnish is cured. After four insulation treatments, the furnace lining is then knotted to protect the coil. It is fixed on the bottom bracket, stainless steel furnace mouth plate, peripheral bakelite board, waterway, vertical row and buckle-type connecting row, etc., to form a complete intermediate frequency furnace coil.

4. Classification of induction furnace‍coil‍heating‍:

Induction furnaces are divided into intermediate frequency heating furnaces and intermediate frequency melting furnaces, and their coils are also divided into intermediate frequency furnace heating coils and intermediate frequency furnace melting coils;

The heating coil of the intermediate frequency furnace is also called the inductor and the diathermy furnace coil, and the melting coil is also called the melting furnace coil.

5. Copper tube specifications for induction furnace ‍coil‍heating‍:

Induction coil furnace‍ heating coil specifications commonly used are:

10×10×2mm

12×14×2mm

14×16×2mm

16×18×2mm

18×20×2mm

20×10×2mm

22×18×2mm

24×15×2mm

25×20×2mm

26×20×2mm

6. Use of induction furnace ‍coil‍heating‍:

1. The use environment of the intermediate frequency furnace ‍heating‍coil is relatively poor, especially in the casting and smelting workshop, where there is a lot of dust or iron filings. Since iron filings or iron slag are easy to fall on the intermediate frequency furnace coil, this will cause carbonization of the inter-turn wood surface of the intermediate frequency furnace coil. In the case of inter-turn short circuit of the intermediate frequency furnace coil, inter-turn ignition will occur, which will break down the copper tube of the intermediate frequency furnace coil and cause the failure of the intermediate frequency furnace. Therefore, it's necessary to clean up the use site of the intermediate frequency furnace frequently, focusing on the intermediate frequency furnace line to the intermediate frequency furnace coil. the

2. When we are overhauling the intermediate frequency furnace ‍heating‍coil waterway, we should pay attention to the direction of the cooling water in and out of the intermediate frequency furnace coil. The correct direction of the cooling water is to enter from the bottom and to exit from the top, so as to avoid the top of the waterway. Only in this way can we ensure that the intermediate frequency furnace coil is filled and we must pay attention to how large the water flow is, so as to ensure the cooling effect of the intermediate frequency furnace coil. the

3. Whether the intermediate frequency furnace is used for diathermy or smelting, attention should be paid to the use of the furnace lining.

If the lining of the intermediate frequency heating furnace is broken, the metal oxide skin will fall on the coil, causing a short circuit between turns. The lining of the intermediate frequency smelting furnace is broken and the lining becomes thinner, and the molten steel passes through the lining and flows onto the induction coil), and the high temperature molten iron in this case will burn out the induction coil of the intermediate frequency furnace. Therefore, it's necessary to check the lining material of the intermediate frequency furnace frequently to avoid damage to the lining caused by rapid cooling and rapid heating.

Through the above, we believe you have a better understanding of the induction coil furnace heating coil. 

If you have any questions or needs and questions about induction furnaces, EAF, LF,SAF and other melting furnaces and accessories, please continue to pay attention or email us, we will give you a professional reply as soon as possible!

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Xi'an Hani Tech Co.,Ltd