The main differences between power frequency furnace and medium frequency induction furnace are as follows:

1. Medium frequency furnace has high power density and high productivity That is, under the same stirring force and capacity, the medium frequency furnace can input three times the power of the power frequency furnace. In other words, the crucible size of the medium frequency furnace with the same power is only one third of that of the power frequency furnace In larger furnaces, due to the influence of inductor line current and voltage, the input power of medium frequency furnace is about two times that of power frequency furnace Therefore, the average power consumption of medium frequency furnace is lower than that of power frequency furnace

2. The medium frequency furnace can empty the charge during each smelting, which is easy to change the variety of molten metal. It has fast starting melting, no need to start melting, and easy to use The power frequency furnace needs to leave part of the remaining molten iron for the next 4 melting, otherwise the starting block should be used

3. Under the same productivity conditions, the selected medium frequency furnace has small capacity, so the floor area is small, the amount of furnace lining materials is small, and the operation cost is low

4. The operation reliability of medium frequency furnace is high and the utilization rate of equipment is improved

5. Compared with power frequency furnace, medium frequency furnace has less stirring force, less metal scouring on furnace lining and long service life of furnace lining In recent years, with the development of SCR medium frequency power supply technology, large-scale high-power medium frequency smelting furnace has developed rapidly, which has been adopted by more and more users, and has the trend of gradually replacing small and medium-sized power frequency furnace This paper compares and analyzes the energy consumption of power frequency furnace and medium frequency furnace, and provides necessary technical data as a reference for feasibility analysis and scheme selection