4. The melting furnace has high frequency, medium frequency and power frequency Metallurgy Machine

High frequency melting furnace

The capacity OF the high frequency furnace is generally less than 50 kg. It is suitable for smelting special steels and special alloys in the laboratory and small-scale production.

Intermediate frequency melting furnace

The capacity and power of intermediate frequency melting furnace are larger than that of high frequency furnace. It is mainly used for smelting special steel, magnetic alloy and copper alloy. Because this kind of furnace needs expensive frequency conversion equipment, so in some large capacity occasions has been changed to the frequency centerless furnace. However, compared with the power frequency furnace, the intermediate frequency furnace also has its unique features. For example, for the same capacity of the furnace, IF the input power of the furnace is larger than the power frequency furnace, so the melting speed is relatively fast, IF the furnace in the cold furnace melting does not need the furnace block, liquid metal can be all poured out, so the use of flexible than the power frequency furnace; In addition, IF melting furnace solution scour the crucible lighter, which is beneficial to furnace lining. Therefore, after the development of high power and cheap IF power supply, IF furnace is still promising.

Power frequency melting furnace

Power frequency melting furnace is the most recent and the most rapid development of several melting furnaces. Mainly used in cast iron and steel, especially high strength cast iron and alloy cast iron melting and cast iron solution heating, heat preservation and composition adjustment; In addition, it is also used for smelting of copper, aluminum and other non-ferrous metals and their alloys. If the furnace capacity is small and the power frequency is uneconomical, take cast iron as an example, the electric efficiency decreases significantly when the capacity is less than 750 kg.