A new process was devised for promoting inclusion separation in the continuous casting tundish to produce high cleanliness steel. The process utilizes electromagnetic force to rotate molten steel in a cylindrical tundish. The centrifugal force caused by the rotational flow promotes separation of inclusions from the molten steel. This tundish is referred to as the Centrifugal Flow Tundish (CF tundish). In this study, the mechanism for separating inclusions from molten steel stirred with a rotating electromagnetic field was clarified in a hot model experiment. Subsequently, the application of this method to the removal of inclusions in the tundish were investigated in pilot plant test and industrial plant test. It was revealed that centripetal force and large turbulent energy caused by rotational flow accelerate the separation of inclusions from molten steel in the CF tundish. Industrial plant tests carried out at Chiba Works showed that the CF tundish has a high deoxidization capability.
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