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Patent Pending PROBLEM TO BE SOLVED: To provide a new method and a new device capable of easily removing inclusions in a molten metal such as a molten steel. ; SOLUTION: A rotary motion generating coil 12 is provided in the outer circumferential face of a cylindrical vessel 11, and further, a coil 13 for generating motion in an axial direction is provided in the outer circumferential face of the vessel 11.