| 摘要 |
A molten metal stirring apparatus stirs molten metal by sucking the molten metal into a riser linked to a melting furnace beneath the surface of molten metal in the melting furnace, and returning the molten metal in the riser into the melting furnace. The apparatus includes an electric heater for heating the riser and provided in the vicinity of the position reached by the molten metal drawn into the riser. A changeover valve is linked to the upper end of the riser. A vacuum source, for reducing the pressure inside the upper end of the riser, is connected to the changeover valve. A duct, leading exhaust gas from the melting furnace to the upper end of the riser, is connected to the changeover valve. A heater for heating the riser is provided coaxially with and on the outer periphery of the riser. |
