To provide a firing furnace for performing accurate temperature control.
A temperature difference between a temperature in the furnace measured by an in-furnace temperature measuring thermocouple 103 and the temperature of a treated object measured by a treated object measuring thermocouple 104 is found for every preset temperature band or for every preset time interval to create a correction table. Next time or later, when firing a treated object 105 which has the same quality, size or amount of charge into the furnace 102, the created correction table is used for correcting the temperature in the furnace measured by the in-furnace temperature measuring thermocouple 103 and controlling the temperature of the treated object 105 when fired in accordance with the corrected temperature in the furnace. Thus, the temperature of the treated object subjected to microwave heating is accurately controlled in accordance with the temperature in the furnace.
KAWADA TAKAYUKI
Toshimitsu Ichikawa
Kimihide Hashimoto