About the classification of electric furnaces
We have introduced a lot of relevant knowledge about induction furnaces. Today, Hongteng editor will summarize the classification of induction furnaces.
Induction furnaces are classified according to their structure, and there are two categories: crucible type (coreless induction furnace) and groove type (cored induction furnace).
Crucible coreless induction furnaces can be divided into power frequency furnaces and intermediate frequency furnaces according to different frequencies.
According to different structures, grooved cored induction furnaces can be divided into vertical furnaces and horizontal furnaces.
In the field of foundry, induction furnaces are used for three purposes: melting, holding and pouring. According to these different uses, electric furnaces can be divided into: melting furnaces, holding furnaces and pouring furnaces.
Power frequency crucible induction furnace is mainly used for smelting cast iron and non-ferrous metals. Due to the large electromagnetic stirring force, the life of the furnace lining is very short during steelmaking. Therefore, it is not suitable for steelmaking unless the life of the refractory material can be solved.
For non-ferrous metals with strict gas content requirements (such as oxygen-free copper), it is not suitable to use power frequency crucible induction furnaces.
When the power frequency crucible induction furnace is used as a holding furnace, the induction coil is short, about 1/4 of the crucible height.
Medium frequency crucible induction furnace is suitable for melting and heat preservation of steel and non-ferrous metals. Compared with the power frequency crucible induction furnace, the advantages of the intermediate frequency crucible induction furnace are that the power density is high, the melting is convenient, and the three-phase balance device is not required. Under the same production conditions, the size of the furnace body is small. The medium frequency crucible induction furnace can empty the molten steel, which is convenient for changing metal types.
Crucible induction furnace is characterized by simple shape of furnace lining, convenient furnace construction, easy inspection and repair of furnace lining, and can be started and stopped at any time.
The grooved induction furnace is mainly used for the smelting and heat preservation of non-ferrous metals such as copper, aluminum and zinc, and the heat preservation of cast iron, as well as the pouring furnace on the pouring line.
The groove type induction furnace is characterized in that the furnace electrical efficiency and power factor are higher than those of the crucible induction furnace. The disadvantage is that the refractory material in the groove part is not easy to inspect and repair, and it is also necessary to conduct current insulation when not in production, and it is difficult to change the metal type. Therefore, the grooved induction furnace is suitable for the production of a single variety.
This is what we share today about the classification of furnaces, I hope it can be helpful to you.
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Video of the use process of the furnace