PLASMACHEMICAL METHOD OF PRODUCING MODIFIED SUPERDISPERSED POWDER Russian patent published in 2013 - IPC B22F9/02 B01J19/08 C23C4/00 

FIELD: process engineering.

SUBSTANCE: invention relates to plasma technology. Proposed method comprises producing superdispersed powder by subjecting the stock to effects of plasma of high-frequency induction discharge of H-shape at voltage at inductor of 100-200 V and temperature in the discharge of 2000-10000°C. Then powder modified at the first step is modified by plasma of high-frequency induction discharge of atmospheric pressure of E-shape at voltage at inductor of 3.0-3.5 kV and temperature in the discharge of 300-1000°C at simultaneous feed of modifying reagent into plasma. At both steps the processes are realised on feeding plasma-forming gas at flow rate of 8-15 m³/h and that of carrier gas of 0.2-1.0 m³/h. Proposed method is realised in a wide temperature range to expand the range of produced powders. Note here that temperature conditions are controlled by adjusting the anode voltage on selecting H- or E-shape of high-frequency induction discharge.

EFFECT: production of modified superdischarge powders in single process cycle.

3 cl, 9 ex, 2 tbl, 13 dwg