| 摘要 |
PURPOSE:To form the superfine particles of mineral matter by supplying the powder mineral matter material to a high-temp. field formed in a pressurizing furnace, evaporating the mineral matter and expanding and cooling an exhaust gas, then bringing the gas into reaction with gaseous plasma and charging a cooling gas thereto. CONSTITUTION:Fuel and oxygen or oxygen enriched air are supplied to the pressurizing furnace 01 having a cooling structure and are subjected to reduction combustion under pressurization at a theoretical air-fuel ratio or below to form the high-temp. high- pressure combustion filed. The powder mineral matter material is supplied to this field and the temp. is controlled to over the evaporation temp. of the competent mineral matter material or the single component mineral matter to evaporate the mineral matter and the material is evaporated. The high-temp. combustion gas contg. the evaporated vapor is expanded and cooled to the outside of the system from the pressurizing furnace 01 by a reduced pressure nozzle 02 integrated with the furnace 01. Further, the gas converted to plasma from near the nozzle 02 is supplied form a device 09 to bring the gaseous plasma and the evaporated vapor into reaction; thereafter, the cooling gas is charged from a fan 10 to cool the vapor formed by the reaction to solidity. The superfine particles of the mineral matter are thus formed. |
