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On controlling the working temperature of the intermediate frequency induction furnace


Our company is a manufacturer of induction furnaces.

Among our many products, the intermediate frequency furnace has always been a hot selling product.

After the user buys the new furnace, there is a problem that many users have to consider when using it. That is how to control the working temperature of the intermediate frequency furnace.

To address this issue, we have summarized some knowledge and experience here to share with you today.

It is mainly about the cold start and boot operation of the intermediate frequency furnace.

Cold start of intermediate frequency furnace

During cold start, it is necessary to give enough time for the lining material to expand reversibly and seal before the molten metal liquid contacts the lining to avoid cracks due to cold and hot shock.

For the intermediate frequency furnace, the thermocouple temperature in the middle of the effective coil is the control temperature, and gas can also be added to the bottom of the furnace to help reduce the temperature difference between the upper part of the furnace and the whole furnace lining.

In the cold start process, 3 ~ 4 K-type thermocouples should be used to detect the temperature, and the thermocouple should be placed close to the furnace wall or bottom.

Start to use low power transmission, gradually increase the power, to the full power of 20% ~ 30% 15 minutes later, the small cracks appear when the furnace lining cooling closed, and then send the full power.

After the end of heat preservation, the charge is quickly melted and then put into normal use.

If furnace startup operation

Close the switch of the low-voltage switch frame of the upper line, observe whether the three-phase input line voltage and ammeter indication are normal, and adjust the power potentiometer to a small value.

Press the control power switch button, after 2 ~ 3 seconds, press the main circuit switch button, and then press the inverter start button, IF power supply starts to work, at this time DC voltmeter, ammeter, IF frequency meter, power meter are indicated.

After successful startup, slow down the power knob to the desired power position and input power.

If the IF frequency is not established, it indicates that the start failure, press the inverter stop button, make it reset, and then press the inverter start again to establish the IF.

This is our knowledge sharing about IF furnace today. I hope it can be helpful to you. Welcome to pay attention to Luoyang Judian to learn more about IF furnace.

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