| 摘要 |
A non-ferrous metal melting furnace includes a non-ferrous metal melt pump, a vortex chamber body, and a magnetic field device formed of permanent magnets. The vortex chamber body makes a non-ferrous metal melt flow into a vortex chamber from an inlet, makes the non-ferrous metal melt flow in a spiral shape by applying a driving force to the non-ferrous metal melt in the vortex chamber, and discharges the non-ferrous metal melt from the vortex chamber to an outlet. The magnetic field device formed of permanent magnets is disposed outside the vortex chamber and below a bottom plate of the vortex chamber, and applies the driving force to the non-ferrous metal melt by an electromagnetic force that is generated by current flowing in the non-ferrous metal melt and magnetic lines of force from the magnetic field device formed of permanent magnets. The vortex chamber body includes a spiral flow channel that is formed from the inlet to the outlet. The inlet and the bottom plate face each other in an up-and-down direction. The outlet is opened in a substantially horizontal direction. The bottom plate forms a flat surface following a horizontal plane. A first electrode is disposed on an inner surface of the bottom plate. Second electrodes face the inner surface of the bottom plate in an up-and-down direction, and are disposed on an inner surface of a top plate of the vortex chamber so that current flows between the first electrode and the second electrodes. The magnetic field device formed of permanent magnets is disposed below the bottom plate of the vortex chamber of the vortex chamber body and outside the vortex chamber so as to face the bottom plate in an up-and-down direction. The flow-in direction of the non-ferrous metal melt that flows into the vortex chamber, and the direction of the magnetic lines of force that are generated by the magnetic field device formed of permanent magnets follow the up-and-down direction. The non-ferrous metal melting furnace includes the non-ferrous metal melt pump, and a substantially tubular melting furnace including an opening through which non-ferrous metal as a raw material is input.
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