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In present work,the application of Magneto Hydrodynamics(MHD)to control the flow of liquid steel during secondary refining and continuous casting has been discussed.A mathematical model was developed to predict the flow field under magnetic field in different metallurgical reactors.As examples,the effect of traveling magnetic filed in RH degasser has been discussed,and the effect of electromagnetic brake(EMBR)on flow field during continuous casting process has also been discussed.The numerical results show that when the EMBR is installed near the nozzle port,the intensity of impinging jet near the narrow face mold wall is reduced,the downward flow becomes weaker,and the lower recirculation zone becomes smaller.The circulation flow rate with traveling magnetic field imposed around the up snorkel in RH degasser is greater than that with magnetic field imposed around the down snorkel if the gas flow rate is less than the saturated value,but they are almost the same if the gas flow rate is greater than the saturated value.
In present work, the application of Magneto Hydrodynamics (MHD) to control the flow of liquid steel during secondary refining and continuous casting has been discussed. A mathematical model was developed to predict the flow field under magnetic field in different metallurgical reactors. As examples, the effect of traveling magnetic filed in RH degasser has been discussed, and the effect of electromagnetic brake (EMBR) on flow field during continuous casting process has also been discussed. The numerical results show that when the EMBR is installed near the nozzle port, the intensity of impinging jet near the narrow face mold wall is reduced, the downward flow becomes weaker, and the lower recirculation zone becomes smaller.The circulation flow rate with traveling magnetic field imposed around the up snorkel in RH degasser is greater than that with magnetic field imposed around the down snorkel if the gas flow rate is less than the saturated value, but they are almost the same if the gas flow rate is greater than the saturated value.