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In order to overcome the pollution of the tratitional nozzle sand into the molten steel in tundish,a new method is proposed in this paper.In this method,the nozzle sand is substituted with iron-carbon alloy particles which have the same or similar compositions as the liquid steel.During casting processes,iron-carbon alloy forms solidification shell and the sintered layer in the upper nozzle to block the molten steel.When the slide gate is opened,the eletromagnetic induction heating is used to melt them so as to achieve 100%smoothly steel teeming.The electromagnetic induction heating effects were analyzed theoretically in the new slide gate system.Then the new method has been experimentally tested by using self-designed experimental device.The results show that the electromagnetic induction heating can complete the steel teeming within the required time.Furthermore,this steel-teeming technology can further improve the cleanliness of liquid steel.
In order to overcome the pollution of the tratitional nozzle sand into the molten steel in tundish, a new method is proposed in this paper. In this method, the nozzle sand is substituted with iron-carbon alloy particles which have the same or similar compositions as the liquid steel. Drawing process, iron-carbon alloy forms solidification shell and the sintered layer in the upper nozzle to block the molten steel. When the slide gate is opened, the eletromagnetic induction heating is used to melt them so as to achieve 100 % smoothly steel teeming. The electromagnetic induction heating effects were analyzed theoretically in the new slide gate system. The new method has been experimentally tested by using self-designed experimental device. The results show that the electromagnetic induction heating can complete the steel teeming within. the required time.Furthermore, this steel-teeming technology can further improve the cleanliness of liquid steel.