PROCEDURE FOR PRODUCTION OF POWDERS OF HIGH-MELTING METALS Russian patent published in 2010 - IPC C25C5/04 B22F9/18 B82B3/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to procedure of production of high-melting metal powders. The procedure consists in preparing homogenous mixture of halogenides of alkali and alkali-earth metals at temperature above 500°C, in continuous mixing and in successive introducing alkali or alkali-earth metal at amount sufficient for forming a thin uniform layer on surface of electrolytic melt and constituting (1-5)×10^-2 cm³ of metal per 1 cm² of electrolyte area. Further, halogenides of alkali and alkali-earth metals are electro-chemically reduced in electrolyte melt in pressure tight inert atmosphere of an electrolytic cell. Also electro-chemical reduction is performed under isothermal conditions with direct current feed of cathode density from 0.01 to 1.0 A/cm². Metal of produced powder is used as a cathode and anode. Electrolyte is mixed by rotation of an anode. Nano-dimension metal powder of required metal is produced in volume of electrolyte. Upon cooling metal is extracted, crushed and washed.

EFFECT: production of nano-crystal powders of metals of homogenous granulometric composition possessing large specific surface and high purity.

9 cl, 8 ex