| 摘要 |
The invention relates to a method for atomizing molten metals. According to said method, the liquid molten metal bath is atomized from a tundish using a propellant gas via an outlet with gas into a refrigerated chamber or onto a surface to be coated to compact the reduced particles. The liquid molten met al is introduced via an annular gap into the outlet, in which hot gas with a temperature of between 250~ C and 1300~ C and a supercritical pressure of between 2 and 30 bar is ejected concentrically in relation to the outlet, by means of a Laval nozzle. The hot gas is brought into contact with the molten metal bath by a component that is directed radially outwards, or by a torsio n whose speed is greater than the speed of sound. The device for carrying out said method has a molten metal tundish (1), an immersion pipe (4) that is immersed in the molten metal (2) and that forms an annular gap that surround s the outlet for the molten metal (2) and a lance (7) for ejecting the propellant gas. The lance (7), whose height can be adjusted bears a Laval nozzle (9).
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