| 摘要 |
PURPOSE:To completely decarbonized a non-oxide without oxidizing the non- oxide by burning and removing carbon contained in the non-oxide while fluidizing the non-oxide. CONSTITUTION:A heater 2 provided on the periphery of a metallic vessel 1 of stainless steel, etc., and a heater 11 furnished in an air inlet are turned on. Combustion air is supplied into an air inlet chamber 10 from an inlet pipe 12, and introducing into the vessel 1 through a diffusion plate 9 to heat the whole vessel to <=500 deg.C. A specified amt. of a raw material to be dried such as a synthetic non-oxide (e.g., Si3N4, SiC, AlN, etc.,) contg. carbon is supplied into the vessel from a raw material supply pipe 4, and the raw material is fluidized in the vessel while controlling the exhaust amt. and drying air amt. The combustion of the carbon in the raw material is started under such conditions, and the inside of the vessel is heated. Accordingly, the heater is turned off, and the air amt. is adjusted to keep the temp. in the vessel at 700 deg.C. When the CO2 and CO discharged from the exhaust pipe are not detected, an opening and closing device 7 is operated, and the product is taken out from a chute 8. |
