TEMPERATURE CONTROL METHOD IN VERTICAL INDUCTION HEATING FURNACE

摘要

PURPOSE: To enable the extension of a life of a metal ware of a fireproof furnace bed of a vertical type induction heating furnace. ;CONSTITUTION: A metal ware 6 of a 2-layer/3-split fireproof furnace bed made of a high chromium fireproof alloy with a high melting point is arranged on a slab carrier surface of a lift furnace bed 3 with which a slab 5 is charged into a vertical induction heating furnace 1, the slab 5 is placed on the metal ware 6 of the fireproof furnace bed and then, the bed is lifted to be loaded into a furnace body 2. The slab is heated by induction up to a target temperature. After the heating of the slab, the lift furnace bed 3 is lowered once to discharge the slab 5 outside and then, is loaded into furnace body 2 again. An induction heating coil 4 is energized or controlled to cool the furnace bed metal ware 6 gradually so that the temperature falling rate is held under a critical temperature falling rate to prevent the generation of heat impact. In the heating of the slab 5 continuously. the fireproof furnace bed metal ware 6 is kept at a specified heat preserving temperature. When the heating of the slab 5 is not conducted continuously, the bed metal is let to cool naturally below the heat preserving temperature.;COPYRIGHT: (C)1994,JPO&Japio