What are the causes of furnace leakage in medium-frequency melting furnaces?
2021-02-14
In practice, leakage incidents in medium-frequency melting furnaces are extremely serious. If no measures are taken, it could lead to the rupture of the copper tubes in the induction coil, causing molten iron and cooling water to explode—a scenario that is highly dangerous. Therefore, everyone must pay close attention to the proper use of medium-frequency furnace equipment. Now, do you know what causes leaks in medium-frequency melting furnaces? Let us walk you through it step by step.
There are many reasons for leaks in medium-frequency melting furnaces during operation, primarily due to: substandard quality of the lining materials; an improperly formulated recipe for the lining materials during mixing; immature techniques used in the lining compaction process; failure to properly fire the furnace lining before use; and rapid thermal expansion and contraction of the lining during operation, leading to excessive thinning over time.
If an intermediate-frequency melting furnace leak occurs, immediately cut off the power supply and inspect the area around the furnace for any molten-metal leakage. If a leak is detected, promptly open the furnace and pour out the molten iron. If no leakage is found, follow the standard leak alarm inspection and repair procedure. However, if the furnace itself is leaking, it must be rebuilt after draining the water from the furnace.
During the operation of medium-frequency melting furnaces, cracks frequently develop in the furnace lining for various reasons, leading to molten steel leakage. This situation can potentially cause insulation damage to the induction coils, insulating pillars, and magnetic yokes—and in severe cases, even result in the melting of the copper tubing within the induction coils. Moreover, when high-temperature molten steel comes into contact with the cooling water inside the induction coils, it could trigger even more catastrophic consequences. Therefore, it is essential to install a leak detection alarm system during equipment operation. This alarm will activate before the molten steel reaches the induction coils, providing ample time to implement preventive measures and avoid furnace leakage incidents, thereby ensuring safe production.
The basic principle of the leak detection device is as follows: a sensing liquid level is drawn from the furnace via an embedded stainless steel wire lined inside. A detection electrode is then connected to the bottom of the metal structure. A DC power source is applied between the two detection electrodes, and a milliammeter continuously measures and displays the magnitude of the leakage current.
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2025-09-17