METHOD FOR DRIVING INDUCTION FURNACE FOR USING VACUUM MELTING AND ALSO PRESSURIZED MOLTEN METAL POURING

摘要

PURPOSE: To provide a driving method of an induction furnace for using a vacuum melting and also, a pressurized molten metal pouring, by which the oxidation of the molten metal can drastically be restrained while preventing the entrapment of slag into the molten metal. ;CONSTITUTION: After charging metallic raw material into the induction furnace 4, the induction furnace 4 is closed with a furnace cover for vacuum melting, and after evacuating, the metallic raw material is melted with the induction heating and the evacuation is stopped. Successively, the inner part of the induction furnace is displaced with inert gas and returned back to the atmospheric pressure and the furnace cover for vacuum melting is shifted to a waiting position. Successively, a furnace cover 25 for pressurize molten metal pouring at the other waiting position is shifted on the induction furnace and closed. The inert gas is introduced from pressure piping 26, and the molten metal in the induction furnace is tapped to the outer part from a pouring nozzle 33 through a pouring syphon 32 and a pouring chamber 31.;COPYRIGHT: (C)1996,JPO