The melting furnace is a power supply device that converts the power frequency 50HZ alternating current into an intermediate frequency (300HZ or more to 1000HZ), converts the three-phase power frequency alternating current into a direct current, and then converts the direct current into an adjustable intermediate frequency current, and supplies the capacitor. And the intermediate frequency alternating current flowing through the induction coil generates high-density magnetic lines in the induction coil and cuts the metal material contained in the induction coil to generate a large eddy current in the metal material. The metal is heated by the principle of electromagnetic induction.
Melting furnace is widely used in smelting non-ferrous and ferrous metals. Compared with other casting equipment, intermediate frequency induction furnace has high thermal efficiency, melting time is short, less burning of alloying elements, wide melting material, small environmental pollution, can accurately control the temperature and composition of liquid metal and so on.
The melting furnace is mainly composed of ruthenium made of refractory material in the power source, the induction coil, and the induction coil. The crucible contains metal charge, which is equivalent to the secondary winding of the transformer. When the induction coil is connected to the AC power source, an alternating magnetic field is generated in the induction coil, and the magnetic flux cuts the metal charge in the crucible, and an induced electromotive force is generated in the furnace. Since the charge itself forms a closed loop, the secondary winding is characterized by only one turn and is closed. Therefore, an induced current is simultaneously generated in the charge, and when the induced current passes through the charge, the charge is heated to cause it to melt.
The intermediate frequency electric furnace uses the intermediate frequency power source to establish an intermediate frequency magnetic field, so that the induced eddy current inside the ferromagnetic material generates heat and reaches the purpose of heating the material. The medium frequency electric furnace adopts 200-2500Hz intermediate frequency power supply for induction heating, smelting and heat preservation. The medium frequency electric furnace is mainly used for melting carbon steel, alloy steel, special steel, and can also be used for melting and warming of non-ferrous metals such as copper and aluminum. The equipment is small in size and weight. Light, high efficiency, low power consumption, fast melting and heating, easy control of furnace temperature and high production efficiency.
Main Parameters of the 5 tons/2500KW Intermediate Frequency Furnace :
Maximum Operating Temperature
Induction Coil Diameter
Induction Coil Height
1. Fast heating, high production efficiency, less oxidative decarburization, material and cost savings, and extended die life.
2. Excellent working environment, improve workers' working environment and company image, no pollution, low energy consumption.
3. Uniform heating, the minimum temperature difference between the core and high-temperature control.
4. The melting speed is fast, the burning loss is small, and the energy consumption is low.
5. Self-mixing function, melting temperature, and uniform metal composition.
6. The electric heating work environment is good.
7. start performance is good, empty furnace, the full furnace can reach 100% start.
The medium frequency furnace heating device has the advantages of small volume, light weight, high efficiency, excellent thermal processing quality. It is rapidly eliminating coal-fired furnaces, gas furnaces, oil-fired furnaces and ordinary resistance furnaces. It is a new generation of metal heating equipment.