The main points of the use of induction melting furnace

As the main equipment of the forging industry and the foundry industry, the induction melting furnace has made a great contribution to the basic forgings and castings of the machinery industry. With the further improvement and development of smart factories, the requirements for the use of induction melting furnaces are becoming more and more stringent. There are strict requirements for the use of induction melting furnaces, large and medium repairs, etc., which makes the use of induction melting furnaces more and more important. The management and use level of induction melting furnaces has also been continuously improved. So, what are the main points of the induction melting furnace? Let’s discuss it.

1. Standard installation of induction melting furnace, shorten the connection between high-voltage, transformer, intermediate frequency power supply, and induction melting furnace, and use high-purity T2 copper or oxygen-free copper, especially induction coils and water-cooled cables, to increase their cross-sectional area Can effectively reduce current heat loss.

2. The induction melting furnace should use a special rectifier transformer to increase the power supply voltage and limit the no-load operation of the transformer.

3. In the smelting process, the induction melting furnace preferentially selects the steel shell furnace body to reduce the heat loss and electromagnetic loss of the furnace wall and furnace mouth. The connection of the furnace shell of the induction melting furnace prevents metal contact from forming a short circuit during operation.

4. Select the appropriate capacity and frequency induction melting furnace according to the casting process, increase the power density to improve the melting efficiency and reduce the additional loss.

5. Strengthen the management and maintenance of the induction melting furnace, reduce the failure rate, and ensure the smooth progress of production.

6. During the feeding operation of the induction melting furnace, the cold and wet charge should be dried first, and cannot be directly added to the melt. It is best to avoid using metal cutting in the first furnace, because the metal cutting can penetrate into the gap of the furnace lining; the furnace must be burned The molten iron can be poured into the furnace when it is heated to about 1000°C, and the furnace can be heated by induction heating with iron blocks.

7. Frequently check whether the connection parts of the conductive systems of the induction melting furnace are in good contact, especially whether the screws at the connection between the water-cooled cable and the induction coil are fastened, and the insulating table and insulating shoes must be inspected once a year.

8. The freezing and sealing time of induction melting furnace charge should not be too long to avoid furnace explosion accident; after sintering the furnace lining, it is advisable to use 30-50% of the rated power and work continuously for more than 5 furnaces

9. Formulate a reasonable casting process, standardize process operations from modeling, material selection, melting, pouring, heat treatment, cleaning, etc., and scientifically manage to reduce energy consumption.

10. During the smelting process, it is strictly forbidden to cut off the power and water in the induction melting furnace. During the smelting process, pay attention to the outlet water temperature and water pressure at all times to keep the water pressure at 0.1-0.3MPa and the outlet water temperature below 55°.