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Compared with aluminum-shell furnaces, the steel-shell medium-frequency induction furnaces produced by Weifang Kanda Electric Furnace Co., Ltd. have the following advantages. Therefore, whenever conditions permit, steel-shell furnaces should be preferred as much as possible.

1) Possesses high overall mechanical performance and is suitable for heavy-duty applications. Melting furnace Manufacturing.

2) Thanks to the reduction of magnetic leakage due to the use of magnetic shims and the enhanced permeability of silicon steel sheets, which in turn boosts magnetic field strength, steel-shell furnaces achieve significant energy savings—reducing electricity consumption during melting by 10%.

3) Sensor The magnetic poles arranged radially account for 60% of the total area, providing stable support and enhancing the sensor's rigidity and strength, thereby preventing force and thermal variations in the sensor.

Causes cracking in the hearth and furnace leakage accidents, thereby extending the service life of the furnace lining.

4) The taphole heights are consistent, facilitating water-dumping operations.

5) The hydraulic system ensures greater stability when pouring molten iron.

　1. Maintenance Medium-frequency electric furnace The machine needs to be shut down for one week or half a month to check its various performance parameters, enabling us to promptly understand the equipment’s condition. Below are the inspection steps that must be performed daily over the course of one week or half a month.

　　2. To ensure optimal operation of the medium-frequency induction furnace, it is essential to perform the following tasks daily: (1) Use a temperature-measuring gun to monitor the temperatures of the thyristors, resistor-capacitor protection resistors, and the operating temperature of the voltage-balancing resistors. The temperature measurements should be taken in three distinct phases: The first measurement, lasting approximately 5–10 minutes, should be conducted when the furnace has just started running and about one-third of the power has been switched on during the first batch of molten steel. The second measurement should be taken around the time when the furnace is nearly full of molten steel. Finally, the third measurement should be taken at the end of the smelting process—when the furnace is operating at full power for the last batch of the day. Of course, to promptly detect and address any issues, it is crucial to record the readings from these three temperature measurements. (1) Daily check whether the cable screws of the medium-frequency induction furnace are loose. (2) Before starting up the furnace each day, make sure that both the power water pump and the furnace water pump are turned on, and verify that the water pressure inside the power cabinet is between 1.5 and 1.7 kg, while the water pressure inside the furnace itself is between 1.5 and 2 kg. (3) Keep the area around the furnace’s water cables clean and free of iron filings and metallic objects.

　　3. Before starting the medium-frequency induction furnace, the pump must be turned on 10 minutes in advance to check for any leaks. If any leaks are detected, they should be addressed immediately to avoid disrupting production.

　　4. If an abnormal SCR temperature is detected in the medium-frequency induction furnace, immediately investigate the cause—check whether a broken water pipe is causing poor water flow and overheating, or whether there is dirt buildup inside the SCR tube sleeve obstructing the flow.

　　5. If the temperature of the resistor in the rectifier’s RC protection circuit is noticeably different from that of other resistors, you should immediately check whether the capacitor has opened circuit or the resistor itself is damaged. Generally speaking, this will cause the reactor to exhibit a noticeable buzzing sound and some vibration when it is first turned on.

　　6. When performing weekly or biweekly inspections and maintenance, pay attention to the following: (1) Ensure that the resistor-capacitor protection devices in the aforementioned tanks show no signs of dropping; otherwise, the short-circuiting of the non-inductive resistors could burn out the KK tubes. If you notice any issues, immediately secure them with a tie. (2) Each week, be sure to tighten all equipment screws and water clamps once to prevent damage caused by loosening or falling off. (3) Once a week, check whether the hydraulic oil level in the medium-frequency induction furnace is sufficient. Generally, the oil level should remain at least 80%. (4) Be aware that some manufacturers use water of lower quality. Please ensure that the water distributors inside the medium-frequency power supply cabinet are functioning properly and that there are no damaged nozzles. If the situation is severe, replace the entire set of water distributors promptly. After removal, never weld the nozzles onto the machine one by one. This could significantly delay production and result in unnecessary time losses. For open-channel systems, it’s generally recommended to replace the water distributors every three months. If the system is fully enclosed, aim to replace them every six months to one year.

　　7. When cleaning pipe sleeves, it is common practice to circulate a 20% dilute hydrochloric acid solution through the sleeve for 10 to 15 minutes. After regular washing, the sleeve must be flushed once with 100% clean water and then dried thoroughly using compressed air before being put into use, to prevent the hydrochloric acid from corroding the pipe sleeve.

　　8. Medium-frequency electric furnace Key points for hydraulic maintenance: When using hydraulic oil, pay attention to both the quantity and quality of the oil. Hydraulic oil generally needs to be replaced every six months, and the filter mesh should be cleaned once a month. Please note that there are two filters in the water pressure station—never allow the bottom of the water pressure station to come into contact with water. Be sure to place the filters on the shelves inside the hydraulic station to prevent metal chips from entering and damaging the pump.