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From the perspectives of material selection and design, reducing energy consumption involves taking measures primarily in four areas.
1. Power supply
The power configuration of the power supply, power transmission, and power cable layout all affect the energy consumption of the medium-frequency induction furnace.
Induction furnace The level of power density configuration—higher configurations result in faster melting rates and better energy-saving performance. Whether the electric furnace can maintain high power continuously supplying electricity into the furnace directly affects energy consumption levels. In medium-frequency furnaces, if the power cable layout is messy, it can impair the power supply’s handling capacity, leading to power instability, lower power conversion efficiency, and ultimately higher energy consumption.

2. Molten substance
The purity of the molten material also affects the energy consumption of the medium-frequency induction furnace during the melting process.
The cleanliness of the charge material surface is critical: if there are 5% impurities, 5% more energy will be consumed to melt these impurities, and this can also shorten the lifespan of the furnace lining. The appropriate length of charge material blocks significantly affects the electric efficiency and melting quality of the electric furnace; generally, block sizes between 200 and 300 mm are ideal.

3. Refractory materials
Heat transfer and internal friction are also a very important aspect; reducing internal friction is crucial.
Using an appropriate crucible can improve the melting rate. Quartz crucibles are highly resistant to high temperatures; when used with a medium-frequency furnace, the metal materials inside the crucible generate their own heat through induction heating, thereby reducing heat loss during the transfer process.

4. Improper operation leads to high energy consumption.
The operational aspect is also very important; improper operation can easily lead to energy waste.
Overheating the molten metal and continuously pouring it out without stopping the furnace is not only unsafe but also incorrect from both energy consumption and melting process perspectives. Typically, an induction furnace’s inductor is divided into upper and lower sections. When the molten-metal level inside the furnace drops below half the height of the upper inductor, the resistance changes, causing the upper inductor to no longer carry any induced current. Instead, all the current concentrates on the lower inductor, overheating the molten metal in the lower section, eroding the furnace walls, and sharply reducing the lifespan of the furnace lining.

As can be seen from the above, reducing energy consumption involves every aspect of the production process—ranging from the materials used for components and melting processes to operational issues during manufacturing. We hope the above information will be helpful to casting manufacturers.