A medium frequency induction melting furnace generates high-density magnetic lines in the induction coil. These magnetic lines cut through the metal material placed inside the coil, inducing strong eddy currents within the metal. Such eddy currents exhibit the characteristics of medium frequency current: free electrons inside the metal flow through the resistive metal body, thereby generating heat.

For instance, when a solid metal cylinder is placed in an induction coil carrying alternating medium frequency current, the cylinder has no direct contact with the coil. Although the coil itself remains at low temperature, the surface of the cylinder quickly heats up to red heat and even melts. The rate of heating and melting can be easily controlled by adjusting the frequency and current intensity.

If the cylinder is positioned at the center of the coil, uniform temperature is achieved around its circumference. Heating and melting produce no harmful gases or strong light that pollute the environment.

Medium frequency electric furnaces produced by Xi’an Lanhui are widely used for melting non-ferrous and ferrous metals. They are mainly applied in melting steel, alloy steel, special steel, cast iron and other ferrous materials, as well as non-ferrous metals such as stainless steel and zinc. They can also be used for melting, heating and holding copper, aluminum and other non-ferrous metals, and can operate in duplex with a blast furnace.