An electromagnetic stirrer

The utility model relates to an electromagnetic stirrer, which comprises an outer shielding cover, annular iron cores arranged in the outer shielding cover, coils wound on the iron cores, and crystal copper tubes arranged inside the iron cores, wherein the section of each iron core is in an annular shape, and high magnetic teeth are arranged on the inner walls of the iron cores and are arranged between two sections of coils. Compared with the electromagnetic stirrer with iron cores adopting other shape, the electromagnetic stirrer has the advantages that: when the annular iron cores and the outer shielding cover are concentric, the distances between the iron cores and the outer shielding cover are equal, accordingly, the insulating distance is equal, the limited space is fully utilized, and the magnetic induction intensity of the iron cores is optimized, so that the section of each iron core can be made large enough, and thus the purpose of manufacturing the high-efficiency electromagnetic stirrer can be achieved.