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Steel-shell furnace Common accidents involving furnace bodies include furnace leaks and furnace breaches. If no measures are taken when such accidents occur, it could lead to rupture of the coil copper tubes, causing molten iron to come into contact with the coolant and resulting in an explosion. This could trigger serious equipment accidents or even casualties. Therefore, it is essential to provide detailed explanations on the potential causes of these accidents, preventive measures, and emergency response plans to be implemented in the event of an accident.

Steel-shell furnace Causes of furnace leakage and furnace penetration accidents

(1) If the molten iron is allowed to cool for too long and forms a crust, it will expand again upon reheating. This expansion can exert pressure on the furnace lining, causing cracks to develop in the lining. During the melting process, molten iron can seep through these cracks, leading to furnace breakthrough or even eruption from the crust, resulting in a furnace explosion accident.

(2) As the furnace age increases, the lining volume expands. The amount of molten iron inside the furnace rises, while the lining becomes thinner, leading to localized inability to withstand the pressure from the molten iron and eventually causing furnace breakthrough.

(3) During furnace lining ramming, certain areas failed to meet the required standards or impurities were inadvertently introduced into localized areas without being detected. As a result, these defects became apparent during melting.

(4) Rapid cooling of the furnace lining causes cracks, which then propagate through the cracks during the melting process.

Preventive measures

(1) Starting from the furnace construction stage, dedicated personnel must be assigned to carry out strict management. Ensure that the lining at each location is uniformly compacted, and strictly prohibit any foreign objects from falling into the furnace lining during compaction.

(2) Before each addition of material, check the furnace lining for cracks or other defects that could lead to furnace leakage. If any issues are found, they must be addressed immediately.

(3) During the melting process, if equipment failure or other factors cause a prolonged interruption in furnace operation, the molten iron should be tipped out of the furnace to prevent it from solidifying and forming a crust.

During the smelting process, if a leakage accident occurs in the furnace body of a medium-frequency induction furnace, it can result in severe losses. Not only will the entire batch of molten steel (or iron) be scrapped, but the furnace’s “heart”—the induction coil—will also be damaged or even rendered unusable. Moreover, there is a risk of personal injury. Therefore, to avoid unnecessary losses and disruptions to production, when using... Steel-shell furnace At this time, it is crucial to prevent furnace leakage incidents. Generally speaking, installing a furnace leakage detection and alarm system is an essential measure to ensure the safe operation of medium-frequency furnaces and can help prevent accidents from escalating. Currently, there are two common approaches: One involves mounting stainless steel sheets on the inner side of the induction coil as a secondary electrode. Six to seven stainless steel wires arranged in a claw-like configuration come into contact with the molten metal, serving as the primary electrode. If the molten metal leaks through the furnace lining and comes into contact with the stainless steel sheet, the furnace leakage detection and alarm system will immediately trigger a leakage alarm.