Design Of New Electromagnetic Induction Tundish And Simulation Of Metallurgical Effect

The flow of molten steel in tundish and the removal of inclusions in molten steel directly affect the quality of steel.Therefore,tundish plays an important role in metallurgical process.The technology of electromagnetic induction heating tundish can carry out thermal compensation and effectively improve the quality of molten steel.In this paper,three new types of induction heaters are designed for two-channel induction heating tundish,and the distribution of magnetic field,flow field and temperature field in the new type tundishs and conventional induction heating tundish are studied by numerical simulation under different electromagnetic parameters.It also provides a theoretical basis for energy-saving and optimization design of electromagnetic induction tundish.The electromagnetic field simulation results show that:the magnetic flux density,electromagnetic force,and Joule heat of the new induction heating tundish and the conventional induction heating tundish have the same distribution law under the same current,the same heating power,and the same cooling intensity of the coil.First,magnetic flux density,electromagnetic force,and Joule heat are mainly distributed on the pipeline.Secondly,the magnetic flux density and electromagnetic force distribution are affected by the proximity effect and the import and export effect.They present a parabola with a downward opening on the central line of the pipeline.and the value near the coil is the largest.The magnetic flux density and electromagnetic force in the two channels of the induction heating tundish of the second structure are the most symmetrical.Under the same power condition,the Joule heat of molten steel in tundish heated by electromagnetic induction of the second structure is the largest,and the temperature of molten steel in tundish is the highest.The electromagnetic induction heating tundish with the second structure has the highest energy utilization rate,which can reach 92.44%.Under the same coil calorific value,the heating power of molten steel in the tundish of the second structure type induction heater is 108.71 kW higher than that of molten steel in the conventional induction tundish.Lower current intensity applied to the coil in the third structure under the same power conditions and the third type induction heating tundish has stronger working ability.Compared with non-induction heating,the flow field and temperature field in the new induction heating tundish have been greatly improved.When the cooling intensity of the coil is the same,the flow velocity of molten steel in pipeline of the second structure is higher.Under different electromagnetic parameters,the inclusion removal rate of the second type tundish is higher than that of the other two structures under the same conditions.