Method for judging the life of medium frequency electric furnace lining

The intermediate frequency electric furnace is one of the indispensable equipments in the modern foundry industry. It is efficient, fast, convenient and reliable. To ensure the efficient work of the intermediate frequency electric furnace, there is another important existence to support it, that is, the lining of the intermediate frequency electric furnace.

The lining of the intermediate frequency electric furnace generally needs to choose high-quality materials with sufficient refractoriness, stable chemical properties, good thermal shock resistance, etc., and the materials that meet these requirements are often expensive. If the furnace lining is replaced early, it will cause a little economic loss, and if the furnace lining is not replaced in time, it may cause the furnace lining to be penetrated by molten iron, and even endanger the safety of equipment and operators in severe cases. It is a very important matter. Today, Xiaobian will popularize it for everyone, and judge the method of lining life of intermediate frequency electric furnace for your reference.

1. Observe the status of each instrument of the electric furnace

The easiest way to judge the life of the intermediate frequency electric furnace lining is to observe the condition of each instrument when the intermediate frequency electric furnace is working. If the life of the furnace lining is about to expire, the hands of the frequency meter, voltmeter, ammeter and other instruments will constantly swing during the working process of the intermediate frequency electric furnace. In this case, do not continue to use it. After the end of the work, you need to replace the lining of the electric furnace in time, otherwise it may cause damage to the equipment or injury to personnel, which will outweigh the gains.

2. Listen to the working sound of the electric furnace

In addition to observing the instrument, listening to the operating sound of the electric furnace is also a way to judge the life of the lining of the intermediate frequency electric furnace. First of all, the furnace worker is required to use the iron bar to slag normally. If there is obvious electric shock when contacting the molten iron, then it is necessary to listen to the sound of the electric furnace when it is working. Obviously there is a change, which proves that the molten iron may have penetrated into the furnace lining, and even has broken down the furnace lining. At this time, it is necessary to dispose of the molten iron in the furnace according to the situation and replace the furnace lining.

3. Judging the life of the intermediate frequency electric furnace lining through the circuit

In addition to the above two methods for judging the life of the intermediate frequency furnace lining, there is another method. When the intermediate frequency electric furnace is started, the sound of the circuit becomes duller than before. And at this time, when the circuit shell and other grounding bodies touch the power supply, they will stop working immediately, which proves that the furnace lining has been broken down by the molten iron. loss.

The above is the method for judging the life of the intermediate frequency electric furnace lining organized by Hongteng Xiaobian for everyone. I hope to provide you with help, so as not to regret it after the loss.

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Video of the use process of the melting furnace