PLASMA-ULTRASONIC METHOD FOR PRODUCING METAL POWDER (OPTIONS) Russian patent published in 2021 - IPC B22F9/14 B82Y30/00 B01J19/08 

FIELD: chemical industry; metallurgy.

SUBSTANCE: invention relates to the chemical industry, powder metallurgy and mechanical engineering. The plasma-ultrasonic method for producing metal powder consists in the fact that a solid electrode in the form of a rod made of a sprayed material is placed in a discharge chamber, it is fixed in a mechanism of movement above the surface of an electrolytic bath, in which there is an electrolyte solution that performs the function of a second electrode; air is pumped out of the discharge chamber and gas is let into it; voltage and discharge current are set between the electrodes. According to the first and second variants, the voltage required for the breakdown of the interelectrode gap is applied to the electrodes from the power source. According to the first and third variants, the negative pole of the DC voltage source is connected to the solid electrode: the cathode, and the positive pole is connected to the electrolyte: the anode. According to the second variant, on the contrary, the positive pole of the DC voltage source is connected to the solid electrode: the anode, and the negative pole is connected to the electrolyte: the cathode and the voltage necessary for the burning of individual micro-discharges on the surface of the solid electrode is applied to these electrodes. According to the first and second variants, the solid electrode is brought into contact with the surface of the electrolyte to ignite the discharge; and according to the third one, the solid electrode is immersed in the electrolyte solution to a depth of 3-10 mm. The process of obtaining a metal powder is carried out when radiation is applied to the solid electrode in the form of ultrasonic acoustic vibrations until the discharge ignition stops. The resumption of the specified process or its maintenance is carried out by bringing the electrodes closer together in manual or automatic mode; in this case, the process of obtaining the metal powder is carried out until the discharge stops burning.

EFFECT: all variants of this method make it possible to increase the productivity of obtaining metal powder.

3 cl, 1 dwg, 6 ex