| 摘要 |
PURPOSE:To produce ultra-fine oxide particles having extremely high crystallinity, easily and economically in high yield, by mixing molten and atomized metal with oxygen(-containing gas) to effect the combustion of the metal. CONSTITUTION:Metal (e.g. aluminum) is thrown into a smelting tank 11 through an inlet port, melted by heating with the heater 12, transferred through the pipe 3 by the pressure of gas supplied from the gas bomb 15 and sprayed and atomized at a high speed from the orifice 21 of the molten metal spray nozzle 2. In the above apparatus, air and/or oxygen are sucked through the air-suction port 24 provided between the nozzle cover 23 and the cap 22, mixed with the atomized metal, and ignited with the igniter 25 placed in front of the nozzle 2. The metal is burnt in the combustion pipe 4 to form ultra-fine oxide particle fume. The ultra-fine particles are introduced together with the combustion exhaust into the ultra-fine particle collector 5 and collected. |
