4. Basic classification of Induction Electric Furnace Metallurgy Machine

Induction furnace can be divided into high frequency furnace, medium frequency furnace and power frequency furnace according to the frequency of power supply; According to the process purpose can be divided into melting furnace, heating furnace, heat treatment equipment and welding equipment; According to its structure form, transmission mode and so on can also be classified. The commonly used induction furnaces are customarily summarized as intentional induction melting furnace, centerless induction melting furnace, vacuum induction melting furnace, induction quenching equipment and induction head heating equipment, etc.

(1) folding inductive melting furnace

The core furnace is named after the core through the induction coil, and because the heat source is a metal groove around, it is also known as the groove furnace. The core furnace can be divided into two categories: slotted type and closed slotted type. The slotted type has been eliminated basically. The furnace has a series of advantages such as fast heating speed, high electric and thermal efficiency, high power factor, less metal burning, low melting cost, less equipment investment (1/2~1/3 of the centerless furnace), easy operation and so on. However, at the beginning of the use of the furnace to have melting, so the furnace and change the metal variety is difficult, so only suitable for a single variety and large quantities of metal continuous melting and insulation.

(2) Folding induction melting furnace

The name of the melting furnace is relative to the heart of the furnace, its liquid metal filled in a crucible, it is also known as crucible furnace. This type of furnace is mainly used for special steel, cast iron, non-ferrous metal and its alloy melting and insulation. The centerless furnace has many advantages, such as high melting temperature, less impurity pollution, uniform alloy composition and good working conditions. Compared with the core furnace, the centerless furnace is easier to start and change metal varieties, and the use is more flexible, but its electric and thermal efficiency is far lower than that of the core furnace. Because of the low surface temperature, the centerless furnace is not conducive to the smelting process requiring high temperature slagging.