Does medium frequency furnace have radiation?

I. Types of Radiation from Medium-Frequency Electric Furnaces

1. Electromagnetic Radiation

The working principle of a medium-frequency electric furnace is to use medium-frequency alternating current to pass through the induction coil inside the furnace, generating a strong electromagnetic field to inductively heat metal workpieces. This high-frequency changing electromagnetic field produces electromagnetic radiation, which mainly includes two types: low-frequency radiation (30kHz-300kHz) and high-frequency radiation (above 300kHz).

Low-frequency electromagnetic radiation mainly comes from the induction coil and busbar, forming a relatively strong radiation field in the space near the furnace body. Electromagnetic waves in this frequency band are easily absorbed by the human body and surrounding equipment; if the radiation intensity is too high, it may have adverse effects on the health of operators and the operation of surrounding electronic equipment.

High-frequency electromagnetic radiation mainly originates from the switching devices and filter circuits in the medium-frequency inverter power supply system. Although the energy of this high-frequency component is relatively small, it still needs to be controlled to avoid interfering with equipment such as radio communications.

2. Thermal Radiation

In the working state, the internal temperature of the medium-frequency electric furnace is very high, reaching over 1600℃. This high-temperature heat source generates a large amount of infrared thermal radiation, which radiates outward through the furnace shell. Without effective heat insulation and protection measures, thermal radiation will not only pose a scald risk to operators but also may affect the normal operation of surrounding equipment.

II. Protection Measures Against Radiation from Medium-Frequency Electric Furnaces

1. Adopt reasonable shielding measures for the furnace body itself, such as metal shields and isolation rooms, to limit radiation within the allowable range.
2. Use electromagnetic shielding and filtering devices for the power supply system and control circuit to suppress electromagnetic radiation sources to a greater extent.
3. Strengthen heat insulation protection in the thermal engineering link, using refractory materials and cooling systems to reduce the surface temperature of the furnace shell.
4. Equip operators with personal protective equipment, such as protective clothing, gloves, and face shields, to avoid direct exposure to the radiation environment.
5. Reasonably arrange the layout of the electric furnace production workshop, keeping personnel activity areas and other equipment away from the main radiation sources.

Do medium-frequency electric furnaces emit radiation? It is believed that everyone now has a basic understanding of this question. In conclusion, although medium-frequency electric furnaces produce a certain amount of electromagnetic radiation and thermal radiation during operation, these radiation hazards can be controlled as long as reasonable protection measures are taken. Both the designers and users of electric furnaces should attach great importance to this issue and implement protection work effectively to create a safe and healthy environment for production.