Medium frequency induction furnace mainly uses the principle of electromagnetic induction and electrothermal effect, through the electric frequency induction power as the core to provide alternating current to the induction coil to establish magnetic field. Magnetic field produces magnetic wire cutting induction furnace metal eddy current to form high temperature, and finally achieve metal melting.
Through the use of electric power induction coil, without additional fuel addition, compared with the traditional furnace, medium frequency induction furnace has many advantages of fast smelting speed, high production efficiency, less casting impurities, low energy consumption, low environmental pollution and so on. It is widely used in the casting industry
Due to the national crackdown on ground steel, the use of medium frequency induction furnace in steel enterprises is under strict supervision, once affecting the development of medium frequency induction furnace industry. Prepared by China foundry association to participate in the “about support against” strip steel “, define the power frequency and IF induction furnace use scope of opinion” (steel association [2017] no. 23) has been clear: casting industry using medium frequency induction furnace production of all kinds of casting products and stainless steel production process of IF induction furnace melting chromium, nickel iron alloy comply with the provisions of the industrial policy.
Due to its advantages of energy saving and environmental protection and high metal element recovery, the medium frequency induction furnace is also widely used in the alloy melting process of stainless steel production. China’s major iron and steel enterprises are basically equipped with the medium frequency induction furnace as the auxiliary melting equipment in the new short process steel making process. At present, the medium frequency induction furnace has become one of the most efficient core basic process equipment for alloy melting in the field of metal smelting, thermal insulation and short process steel making in the modern casting industry, which is irreplaceable. With the clear definition of the use scope of the medium frequency induction furnace by the industrial policy, the medium frequency induction furnace industry has gradually recovered and developed steadily in recent years. In July 2023, the Ministry of Finance and the State Administration of Taxation issued a document to include vacuum casting equipment (crucible capacity of 50 kg) and induction smelting furnace (melting capacity of 10 tons) and other casting equipment as advanced industrial master machine products. The industrial policy will strongly promote the sustainable and healthy development of the medium frequency induction furnace industry.