The medium frequency induction melting furnace has the advantages of strong overload capacity, fast heating speed. Metal burns, high product quality, and high labor efficiency. During use, the energy consumption of the melting furnace of the melting furnace has always attracted much attention. So, how to reduce the energy consumption of medium frequency induction melting furnace?
The medium frequency induction melting furnace is based on the principle of transformer. The coils outside the furnace are equivalent to the original winding to generate the cross-magnetic field after power supply. And melt metal. Usually, we call the intermediate frequency furnace with frequency higher than 50Hz and less than 10,000 Hz. Compared with other heating methods, it has the advantages of high efficiency, fast heating, easy temperature control, and ensuring heating quality.
Increase the frequency of power, the current and loss in the coil will be reduced to improve the efficiency. However, the higher the frequency of the power supply, the lighter the heating layer is (skin collection effect). To make the surface of the work piece and center get the same temperature, we need take a long time transmission. However, the longer the heat transfer time is, the more the heat loses, which will reduce heating efficiency. Thus, it can hardly achieve the effect of rapid heat transmission. Therefore, reasonable selection of power frequency is very important to improve the efficiency of the induction melting furnace.
The ratio of the rated power to the rated capacity (that is, the power of the melting 1kg) is a sign that reflects the melting time of the melting furnace and the melting power consumption. When the ratio is large, the melting time is short, the power consumption is small, and the melting rate is high. On the contrary, the melting time is long, the power consumption is large, and the melting rate is low. Therefore, increasing the matching power of the furnace is a good way to save effect.
Under the condition of meeting the maximum length of the medium frequency power supply and the insulation distance between the bus, the medium frequency line loss should be reduced, and the line resistance can be reduced. The specific measures are as follows:
The temperature of metal liquid is related to the quality of the quality of the final product. If the temperature measured is higher than the actual, it will cause quality problems due to early pouring out. On the contrary, it will extend the heating time. At the same time, it also reduces the service life of the lining and increases the possibility of leakage.
We can use the neutral furnace lining (high aluminum refractory material) to extend the service life of the furnace. The neutral furnace has good thermal stability and high refractory resistance. The maximum can be greater than 1800°C. It can greatly prolong the service life of the furnace. It can greatly reduce the cost of repairing the furnace. And, it can avoid the harm of quartz sand dust to human health.
The above are several methods to reduce the energy consumption of the medium frequency induction melting furnace. With the continuous improvement of the manufacturing process and the accumulation of experience, the medium frequency induction melting furnace has been increasingly applied in the melting of various metals and its alloy.