FLUIDIZED BED FURNACE HEATED BY INFRARED RADIATION

摘要

Heat treating of product such as strip like material is accomplished by use of a fluidized bed heated by infrared radiation energy emitted immediately above the bed. The energy is produced by electrically powered infared radiation lamps, the output of which are controlled in accordance with the heat requirements of the bed. Product is introduced to the bed and heated to the desired temperature upon exiting the bed. Energy distribution throughout the bed occurs rapidly due to the known heat transfer characteristics thereof. Such a system can heat product to a temperature of up to about 1200.degree.C and also allows fast start up of the bed from ambient to the operating temperature.