Classification of induction furnace
According to the power frequency, electric induction furnaces can be divided into three categories: high frequency furnace, medium frequency furnace and power frequency furnace;
According to the Requirement of application, it can be divided into melting furnace, heating furnace, heat treatment equipment and welding equipment;
According to the structure form, transmission methods and so on, it also can be classified. Generally, electric induction furnace be divided into several types: cored induction furnace, coreless induction melting furnace, vacuum induction melting furnace, induction hardening furnace and induction heat equipment, etc.
Following we will introduce cored and cordless induction furnace
Cored induction furnace
Cored induction furnace is known as iron core through induction coil, and the heat source is a round metal groove, so it is called a groove type furnace. Additionally cored induction furnace can be divided into two kinds: the slot type and the closed slot type. Basically, the slot type has been eliminated, the closed slot type is in the majority now. Cored induction furnace is mainly used for copper, aluminum, zinc , other non-ferrous metals smelt and heat preservation, as well as it can preserve heat for the cast iron, etc. This type of furnace have a series of advantages, such as fast heating, high electricity and thermal efficiency, high power factor, less metal loss, smelting low cost, less equipment investment(1/2~1/3) of the coreless induction melting furnace), convenient operation, etc. However, there should be a melt in the furnace when machine start working, it is difficult to play the furnace and change the metal, so, it only applies to smelting and preserving heat for a single varieties and large quantities of metal .
Cored induction furnace is known as iron core through induction coil, and the heat source is a round metal groove, so it is called a groove type furnace. Additionally cored induction furnace can be divided into two kinds: the slot type and the closed slot type. Basically, the slot type has been eliminated, the closed slot type is in the majority now. Cored induction furnace is mainly used for copper, aluminum, zinc , other non-ferrous metals smelt and heat preservation, as well as it can preserve heat for the cast iron, etc. This type of furnace have a series of advantages, such as fast heating, high electricity and thermal efficiency, high power factor, less metal loss, smelting low cost, less equipment investment(1/2~1/3) of the coreless induction melting furnace), convenient operation, etc. However, there should be a melt in the furnace when machine start working, it is difficult to play the furnace and change the metal, so, it only applies to smelting and preserving heat for a single varieties and large quantities of metal .
Coreless induction melting furnace
The name of the coreless induction melting furnace is relative in the cored induction furnace, and the metal liquid is in a crucible, so it is also named crucible furnace. This type furnace is mainly used for special steel, cast iron, non-ferrous metal and its alloy smelting and preserving heat. Coreless furnaces are many advantages, such as high melting temperature, less impurity contamination, alloy composition uniformity, good working conditions and many others. It Compares with cored induction furnace, it is easy to start the furnace and change the metal, it is more flexible, but its electrical and thermal efficiency, is far less than cored induction furnace. Because of the low surface temperature, it is inapplicable for high temperature smelting slag making process
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