Electromagnetic stirrers (EMS) are a must for almost every continuous casting machine for long products. They improve steel quality and support a smooth, stable production process. However EMS are the single biggest consumer of electricity in a continuous caster production line. The modulated wave stirring (MWS) system from SMS Concast radically reduces EMS electricity consumption by 30% and more.
Modulated wave stirring (MWS) shapes the electromagnetic field produced by an EMS. Based on advanced process analysis, it modulates the amplitude and frequency (AFM) of the current in the stirrer coils in such a way that the same stirring effect requires less energy input. The modulated wave requires less energy, hence power savings are achieved. With the amplitude and frequency modulation (AFM) the conventional sinusoidal magnetic field is replaced by a multi-frequency magnetic field so that the liquid steel achieves greater turbulence. The temperature distribution thus getting more uniform, the result is a much more efficient electromagnetic stirring effect.