Molten metal transfer pump and molten metal transfer system

A molten metal transfer pump that sucks and discharges molten conductive metal, the molten metal transfer pump comprising:

• a cylindrical body that is formed of a cylindrical side wall and includes a lower opening as a suction port provided at a lower end and an upper opening provided at an upper end;
• a spiral body that is received in the cylindrical body while being fixed;
• and
• a magnetic field device that is provided on an outer periphery of the cylindrical body,
• wherein the cylindrical body includes a side-wall opening that is opened on the side wall and serves as a discharge opening,
• the spiral body includes a spiral plate, an inner space of the cylindrical body is partitioned into one spiral flow channel, which extends in a spiral shape, by an outer peripheral edge of the spiral plate and an inner surface of the cylindrical body, the spiral flow channel allows the lower opening and the side-wall opening to communicate with each other,
• the magnetic field device includes a permanent magnet body, an inner peripheral side of the permanent magnet body is magnetized to one pole of an N pole and an S pole and an outer peripheral side of the permanent magnet body is magnetized to the other pole, the intensity of magnetization of the permanent magnet body is set to intensity where a magnetic field reaches the inside of the cylindrical body,
• in a case in which a magnetic field, which includes lateral magnetic lines of force directed toward a center of the cylindrical body from an outer periphery, is formed or a magnetic field, which includes magnetic lines of force radially directed toward an outer periphery from the center of the cylindrical body, is formed and a current flows in a longitudinal direction in molten metal present in the cylindrical body, the magnetic lines of force and the current cross each other, so that an electromagnetic force caused by Lorentz force is generated, and the molten metal is driven toward the side-wall opening from the lower opening so as to swirl while the molten metal is made to swirl in the spiral flow channel by the electromagnetic force.