Why is the intermediate frequency induction furnace eliminated?

First, it is not easy to adjust the chemical composition. For example, smelting ZGMn 13Cr2MoVTi is afraid of a steel grade, so smelting in intermediate frequency furnace is more difficult. When molten steel is completely melted, high-temperature molten steel is harmful to the furnace lining during sampling and testing, that is to say, the testing time is short and it is difficult to adjust the chemical composition after testing.

Second, the medium frequency furnace has limited production capacity.

Profile editor

Intermediate frequency induction furnace refers to an induction furnace with power supply and current frequency of 150-8000Hz. The most commonly used frequency is 150-2500Hz. With the increase of furnace capacity, the frequency of current used decreases. The capacity of domestic medium frequency induction furnaces ranges from 50KG to 20T, and the current frequency is 2500- 150Hz.

This eddy current also has some properties of intermediate frequency current, that is, the free electrons of the metal itself flow in the metal body with resistance to generate heat. For example, if a metal cylinder is placed in an induction coil with alternating medium frequency current, the metal cylinder does not directly contact with the induction coil, and the temperature of the electrified coil itself is already very low, but the surface of the cylinder is heated to redness or even melting, and this redness and melting speed can be achieved by adjusting the frequency and current. If the cylinder is placed in the center of the coil, the temperature around the cylinder is the same, and the heating and melting of the cylinder will not produce harmful gases and strong light to pollute the environment.

Working principle editing

The medium frequency induction furnace uses the medium frequency power supply to establish the medium frequency magnetic field, which makes the ferromagnetic material produce induced eddy current and heat, thus achieving the purpose of heating the material. The medium frequency heating furnace adopts 200-2500Hz medium frequency power supply for induction heating, melting and heat preservation. Medium frequency electric furnace is mainly used for melting carbon steel, alloy steel and special steel, and can also be used for melting and heating non-ferrous metals such as copper and aluminum. The equipment has the advantages of small volume, light weight, high efficiency, low power consumption, rapid melting and temperature rise, easy control of furnace temperature and high production efficiency.

Use conditional editing

The altitude does not exceed 3000 meters; The ambient temperature is in the range of 3-40℃; (Anti-freezing measures should be taken in areas below 0℃); The monthly average maximum relative humidity in the use area shall not exceed 90%; There are no conductive dust, explosive gas and corrosive gas around that can seriously damage metals and insulation.