Influence of EMBr on Flow Field of Molten Steel in a Continuous Casting Slab Mold
板坯连铸中电磁制动方式对结晶器中钢液流场的影响

A mercury model was developed to studied the effects of different types of electromagnetic brake(EMBr),electromagnetic mold brake ruler(EMBr-Ruler) and flow control mold(FC Mold) on molten steel flow with the practical casting speeds of 1.0,1.3 and 2.0 m/min in a slab continuous casting mold.The results show that the velocity and fluctuation of the liquid surface flow are depressed with FC Mold,the maximum values of the horizontal velocity and turbulent intensity near the surface are 1/5 and 1/6 respectively compared with those without EMBr,both types of EMBr compress the expanding space of the jet discharged from the outport,the maximum vertical velocity of downward flow near the narrow wall increases from 0.030 m/s without EMBr to 0.066(EMBr-Ruler) and 0.057 m/s(FC Mold),it inhibits the formation of plug flow.EMBr is conductive to the formation of plug flow when the port is placed in the EMBr region and the casting speed is suitable.The flow velocity distribution in mold with FC Mold is better than that without EMBr and with EMBr-Ruler with high practical casting speed(2 m/min).The flow field is better with EMBr-Ruler at 1.3 m/min,but when the casting speed is low(1 m/min),the effects of two types of EMBr are unsatisfactory,even deteriorate the original metal flow.