Channel-type induction-heating ladle device and heating method

Abstract

The invention belongs to the technical field of steel and iron metallurgy, and discloses a channel-type induction-heating ladle device and heating method. The channel-type induction-heating ladle device and heating method are used for heating molten steel in a ladle and reducing the cooling of the molten steel during steel and iron production. The channel-type induction-heating ladle device comprise the ladle, a ladle cover, an iron core, a coil and a water cooling or air cooling device, wherein a channel is arranged in the ladle, and capable of horizontally penetrating through the side wall of the ladle and perpendicularly penetrating the center of the ladle; the iron core penetrates through the channel and surrounds one side of the ladle; the coil is wound around the iron core on the outer side of the ladle; the axis of the coil and the that of the iron core are kept perpendicular; and the coil is connected with the water cooling or air cooling device. The channel-type induction-heating ladle heating method comprises the following steps: (1) conveying the ladle to a refining or pouring station; (2) starting the water cooling or air cooling device to cool the coil, so as to prevent the coil from overheating during the subsequent power-on operation; (3) introducing an alternating current into the coil, so as to generate variable magnetic flux in the iron core, wherein the current magnitude reaches 1-10000 A and the frequency reaches 1-10000 Hz; and (4) after the refining or pouring operation is completed, stopping the power-on operation, shutting down the water cooling or air cooling device, and proceeding with the next working procedure.

Description

Technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and specifically relates to a channel type induction heating ladle device and a heating method. Background technique [0002] As the main tool for steelmaking production, ladle is often used for holding molten steel and refining and pouring. The thermal insulation performance of the ladle directly affects the converter tapping temperature, the refining and casting process outside the furnace, and ultimately affects the quality of steel products. Therefore, how to heat the molten steel in the ladle and reduce the temperature drop of the molten steel has attracted the attention of metallurgical workers. [0003] At present, common ladle heating methods mainly include arc heating method, chemical heating method, fuel combustion heating method, resistance heating method, etc. [0004] Although the arc heating method is widely used, the method requires too high electrode performance, the di...

AI Technical Summary

Problems solved by technology

However, the resistance heating method relies on radiation heat transfer, and the heating efficiency is low. It is extremely difficult to obtain a practical temperature increase rate through this method. Therefore, the resistance heating method has not been developed and promoted basically.

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