Patent ID: 6500228
Filing Date: 2002-12-31
Classification: B22D,F27B,F27D

Abstract:
A dosing furnace for delivering molten metal to a downstream process, comprising:a holding chamber configured to contain a supply of the molten metal; a variable speed pump in fluid communication with the holding chamber, with the pump having a pump inlet connected to the holding chamber and having a pump outlet, and with the pump configured to pump the molten metal through the dosing furnace during operation; a molten metal treatment chamber in fluid communication with the pump through the pump outlet; a dosing chamber located downstream and in fluid communication with the molten metal treatment chamber; and a molten metal level sensor located in the dosing chamber and connected to the pump for providing a pump speed control signal to the pump, with the level sensor configured to monitor the level of the molten metal in the dosing chamber and maintain a preset level of the molten metal in the dosing chamber by controlling the speed of the pump with the pump speed control signal.