METHOD FOR PRODUCING NANODISPERSED POWDERS Russian patent published in 2022 - IPC B22F9/20 B82B3/00 C22B7/00 C22B3/06 C22B3/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to the production of nanodispersed tungsten-containing powders used in the manufacture of tungsten-based hard alloys. Articles and/or wastes from hard alloys are loaded into a sealed reactor with an angle of inclination to the axis of rotation from 0 to 90°. A dispersing liquid is poured into the reactor, having a pH of 1-4 and including an aqueous solution of Fe₂ (SO₄)₃ with a concentration of 5-30 g/l, sulfuric acid and microorganisms Thiobacillus ferrooxidans, ensuring the ratio of the solid and liquid phases S:L, which is 1:(1-7). Continuous rotation of the reactor is carried out at a speed of 2-60 rpm at a temperature of 16-35°C for 480-600 hours until a pulp is formed, which is then defended. After settling, the solution is poured off, and the resulting precipitate is washed, dried and sieved.

EFFECT: obtaining nanodispersed powders containing tungsten or tungsten carbide with high manufacturability and productivity.

3 cl, 9 dwg, 5 ex