electromagnetic stirrer

1. The substance of electromagnetic stirrer (EMS) is to strengthen liquid steel motion by means of electromagnetic force induced in liquid core of strand. In the concrete, alternated magnet field excited by the stirrer penetrates into the liquid steel of strand and generates electromagnetic force under the interaction of induced current and local magnet field. The electromagnetic force is the volume force acted on the liquid steel volume, which can push liquid steel in motion so as to reach the aim of improving slab quality.

2. A large amount of practice shows that suitable electromagnetic stirring used in continuous casting can effectively improve the inner structure, raise surface quality, lighten central segregation and loosening, eliminate central contraction cavity and crack, and greatly increase equax crystal rate. Moreover, it can widen process condition of continuous casting and raise casting speed.

3. According to the installation positions, the electromagnetic stirrers are devided to Mold electromagnetic stirring(E-EMS); Strand electromagnetic stirring(SEMS); Final electromagnetic stirring(FEMS).

4.  One complete set of electromagnetic stirrer for CCM consists of 5 parts:

l        Power supply facilities (incl. transformer and H.V. and L.V. power distribution device (1 set for all).

l        High duty low frequency power (1 for each strand)

l        Electromagnetic stirrer (coil for stirring)  (1 for each strand)

l        Water cooling device (1 set for all)

l        Monitoring and operational microcomputer (industrial computer) (1 set for all)