Regarding the use of a medium frequency furnace, there are many things to pay attention to during smelting operations.
We have summarized some knowledge about the use of electric furnaces to tell you.
Feeding: The induction furnace is used for smelting, although no frit is needed, if the charge is filled from the beginning of the power-on, the load of the equipment will increase and the frequency conversion will be hindered. In addition, the parallel variable frequency intermediate frequency induction furnace produces disordered frequency changes when it is in a high load state. For this reason, it is better to feed gradually.
Pig iron: For the medium frequency furnace with the advantage of rapid smelting, it is agreed that it is better to add pig iron in the early stage of smelting. Because the shape of pig iron is relatively consistent, it is easy to obtain high induced current, which is beneficial to improve the smelting speed.
Ferrosilicon: The higher the Si content in the molten iron, the slower the carburization rate is when the carburizer is added. Therefore, for the medium frequency furnace with weak stirring force, it is better to add ferrosilicon later. Adding too early, the metal charge has not yet melted, which will also have the opposite effect of promoting oxidation.
Recarburizer: For medium frequency electric furnaces, it is best to gradually add carburizer when the metal charge is added. But pay attention to the time of joining. If it is added too early, the carburizer will adhere to the vicinity of the furnace bottom; if it is added too late, it will not only delay the adjustment of the melt composition in the furnace but also may cause excessive heating errors.
Precautions when heating up: When the electric furnace is heating up, in order to avoid the change in the properties of the molten iron during this period, the furnace cover should be closed as much as possible to prevent the surface of the molten iron from dissipating heat and achieve rapid heating. For safety reasons, do not add a charge in the late stage of melting. Because pig iron with rust and moisture is added to a large amount of molten iron that has been heated, when it is immersed in the depth of molten iron, it will explode and cause molten iron to splash.
This is what we share about the smelting operation of the induction furnace today, I hope it can be helpful to you.
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