Abstract: A three-dimensional mathematical model was developed to study the electromagnetic field in a round bloom continuous casting mould with electromagnetic stirring (M-EMS). The simulation results of electromagnetic field were validated by the measured data from the experiments. The effects of stirring current intensity and frequency on magnetic flux density and electromagnetic force were investigated， and the electromagnetic field characteristics were also discussed after applying eccentric M-EMS. The results show that both magnetic flux density and electromagnetic force increase with increasing current intensity. When the stirring current frequency increases， the magnetic flux density decreases and the electromagnetic force increases first and then decreases with the maxima at 2.5Hz. Under the conditions of eccentric M-EMS， the electromagnetic force still appears to be circumferential distribution on the planes transverse to the strand. However， the magnitudes of both magnetic flux density and electromagnetic force show asymmetrical distribution， which are much larger at the side near the external arc of the continuous caster.

Key words: continuous casting, electromagnetic stirring, round bloom, eccentric stirring, electromagnetic field