FIELD: metallurgy.
SUBSTANCE: method for obtaining fractionated ultradisperse metal powders with particles sizes of 5-500 nm, including delivery of initial metal powder with particles average size of 100-150 mcm by flow of inert plasma-supporting gas to reactor of gas-discharge plasma, evaporation of initial metal powder, cooling of evaporation products by cooling inert gas and condensation of obtained metal powder in water-cooling receiving bunkers. Fractionation of condensed metal particles flow is controlled by strength of current in DC electromagnet. Magnet is located from outside of reactor cooling zone, so that poles of generated electromagnetic field are in horizontal plane along the axis perpendicular to plasma stream axis.
EFFECT: possibility of ultradisperse metal powders separation into preset fractions without necessity of particles charge.
6 cl, 14 ex
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