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The medium frequency furnace changes the AC power with a power frequency of 50HZ into a power supply device with a medium frequency (above 300HZ and 1000HZ), rectifies the three-phase AC power frequency into DC, and changes it into an adjustable DC medium frequency current, providing a power supply that flows through the capacitor andinduction coilThe medium frequency alternating current. The induction coil generates a high density of magnetic lines of force, the metal material accommodated in the induction coil is cut off, and the metal material generates a large eddy current. The metal is heated using the principle of electromagnetic induction. With the use of steel and foundry industry is becoming more and more common, the popularity of intermediate frequency furnace, especially in the case of large-scale electric furnace power, coil turns smaller and smaller, more and more users found that the electric furnace in the use of fire phenomenon. The fire of the medium frequency furnace seriously affects the safety performance of the equipment and also threatens the safety of the operators. At the same time, the fire of the coil will lead to the low efficiency of the electric furnace and increase the production cost. Then, let's understand the medium frequency furnace together.induction coilHow to avoid fire!

　induction coilThe main cause of the fire: the insulation capacity of the coil is low. The insulation coating used on the surface of the intermediate frequency coil is an ordinary insulation coating, but due to the poor use of the electric furnace, the reasons for the serious phenomenon of insulation coating falling off and carbonization found on the spot are:

a) In the later stage of furnace service, the refractory material in the furnace becomes thinner, the heat radiated by the coil increases, and the ambient temperature of the coil becomes higher.

B) When the electric furnace is tapped, the slag splashes into the induction furnace coil, and the insulating coating on the surface of the coil is directly damaged.

c) The molten steel exudes from the refractory material and directly contacts the surface of the coil, which immediately destroys the insulation layer on the surface of the coil. In addition, because the current insulating coating does not have high temperature resistance and cannot protect the coil, the high-temperature molten steel that exudes can easily be directly heated through the coil, and the common deep scars of the coil also prove this.

d) The environment in which the coil is located is highly corrosive, and ordinary insulating coatings cannot effectively withstand corrosion, which is easy to deteriorate and fall off and lose insulation capacity.

ZS-1091 high-temperature resistant ceramic insulating coating adopts inorganic-organic polymer materials manufactured by our company's technology, uses inorganic crystalline materials with high volume resistivity and dense structure such as alumina and silica as fillers, and uses ceramic particles manufactured by our company as high-temperature film-forming substances to form high-temperature resistant insulating coating. In the production process, the ratio of raw materials is strictly controlled to minimize the content of glass phase and avoid suspended ions, in particular, the introduction of alkali metal or alkaline earth metal ions reduces as much as possible the electrical conductivity of the glass phase added to improve the process performance. In this process, the introduction of metal ions with variable equivalent numbers of iron and cobalt should be strictly controlled to avoid the generation of free particles and vacancies. At the same time, strictly control the temperature and atmosphere in the production, avoid the electrons and holes generated by the redox reaction, prevent the crystal defects caused by the lattice conversion, and resist high temperature 600 and 1800 for the medium frequency furnace.induction coil, to avoid the coil fire, effective insulation. Other influencing factors of coil fire: The metal dust in the factory is usually very serious. Once the surface of the coil loses its insulation ability, the dust will adhere to the surface of the coil to form a conductor, and the coil short circuit and coil fire will become serious.

When the new lining is burned, the moisture volatilizes to the surface of the coil, and part of the coil leaks cooling water. When the surface of the coil has no insulation capacity, the line is turned on and the coil of the intermediate frequency furnace catches fire. The root cause of the mid-frequency coil fire is that the insulation layer on the surface of the coil is destroyed, and it is easy to form a communication between the coils and catch fire. Therefore, the fundamental way to solve the medium frequency furnace fire is to strengthen the insulation treatment of the coil surface, the construction of high temperature insulation coating, improve the insulation capacity of the coil.

The above is the medium frequency furnace induction coil how to avoid ignition, if you need to know more, you can contact us at any time!