How to choose the furnace ring of the intermediate frequency furnace?
1. The furnace ring of the intermediate frequency furnace is the heart of the whole inductor. The induction furnace ring is powered by the intermediate frequency power supply. Under the action of the intermediate frequency voltage and current, a strong magnetic field is generated. This magnetic field causes the metal in the furnace to generate eddy currents and heat. The furnace ring is a The key to converting electrical energy into heat energy. Therefore, the design of the furnace ring is very important. The furnace ring of this furnace is the best solution determined by computer analysis and calculation according to the principle of electromagnetic field in combination with the actual use of intermediate frequency furnaces at home and abroad.
2. The furnace ring of the intermediate frequency furnace is made of rectangular T2 copper tube. The surface insulation treatment of the copper tube is pickled and then coated with high temperature and moisture-proof insulating enamel, which can achieve H-level insulation. In order to protect its insulation strength, mica tape is used on its surface. It is wrapped with alkali-free glass ribbon, and then the surface of the furnace ring is coated with high-temperature and moisture-proof insulating enamel again, and the four-layer insulation guarantees the withstand voltage to 5000V. There is a certain amount of gap between the turns of the furnace ring. When the refractory tire mud in the furnace ring is coated, the tire mud will penetrate into the gap. Its function can strengthen the adhesion of the furnace ring tire mud on the furnace ring. After the tire mud is built, the inner surface is smooth, which is easy to remove the furnace lining to protect the furnace ring.
- The parameters of the furnace ring and charge of the intermediate frequency furnace are optimized and designed with special computer software. It can ensure the best electromagnetic coupling efficiency under the same capacity. Considering that the electric furnace needs to be overloaded, the rated capacity is artificially slightly larger than the nominal capacity in the design. Only in this way can it be ensured that the liquid level of the charge does not exceed the upper plane of the water-cooling ring when the electric furnace is at the maximum charge. The upper and lower parts of the induction furnace ring are provided with stainless steel water-cooling rings, the purpose of which is to make the furnace lining material uniformly heated in the axial direction and prolong the service life of the furnace lining. Because the lining of the upper part of the water-cooled ring is not cooled, if this part is in contact with the charge for a long time, a higher temperature will be generated, which will cause the furnace lining to crack at the upper water-cooled ring.