Patent ID: 7628838
Filing Date: 2009-12-08
Classification: B01J,B22F,B29B,C21B

Abstract:
1. A method for producing metal particles from molten metal comprising: mixing in a chamber molten metal with gas in a predefined ratio to obtain a hot gas/melt mixture having a ratio of gas to melt of 0.5-15 kg/kg, wherein the chamber is provided with an outlet nozzle for the hot gas/melt mixture; and ejecting the hot gas/metal melt mixture by pressure through the outlet nozzle while adding further gas under pressure at the outlet nozzle to the hot gas/melt mixture leading to a particle velocity of 50-100 m/sec to obtain fine liquid droplets which solidify while cooling to form particles of a controlled size distribution and shape, whereas the size distribution is controlled by variation of the gas/melt ratio.