EMS is widely used in metallurgical and casting machine. With electric stirring technology, slab quality and production can be improved, cost reduced and techniques optimized. EMS generates alternating magnetic field by electromagnetic stirrer, infiltrates into liquid steel, then generates induced current, the induced current interacting with the local magnetic field generates an electromagnetic force; electromagnetic force is applied to the molten steel.
The System Composition of EMS
EMS is composed by electromagnetic stirrer, electric control system and cooling circulatory system. Water cooling circulatory system is composed by preparation system of pure water, pure water box, pump system, network, dashboard and valve.
Installed Position of EMS
Electromagnetic stirrer can be installed on any position of metallurgical length for CCM in principle. Rational installing position plays an important role in metallurgical effect. According to the installing position, it can be divided to:
Mold Electromagnetic stirring (MEMS): The electromagnetic stirrer is installed in copper mold area, MEMS for square and round billet is adopted rotating-field stirrer generally. MEMS for slab is adopted traveling wave field stirrer of double side.
Strand Electromagnetic Stirring (SEMS): The electromagnetic stirrer is installed between the lower part of mold and the secondary cooling area which is before of the two-phase region. SEMS for square and round billet is adopted traveling wave field stirrer of single side. SEMS for slab is adopted traveling wave field stirrer of double side, installed separately on the internal and external arc of CCM. At present, SEMS for square and round billet is rarely adopted.
Final Electromagnetic stirring (FEMS): FEMS is mainly used for square and round billet. The stirrer is installed in the two- phase region of freezing terminal part,
adopting rotating-field stirrer generally .