The granule separation unit "USG-1" is designed to separate bulk materials, the components of which differ in electrical conductivity, using the electrostatic separation method.
The process takes place in an environment of inert gases argon and helium, it is allowed in an argon environment, with simultaneous transportation of the resulting powder materials into a volumetric sealed container without contact with air. The use of granules with a minimum difference in size is due to the quality of the parts obtained by the granule metallurgy method.

Design of "USG-1".
The separator consists of a cover, three working technological sections of separation and an unloading section.
On the upper cover of the separator are located:
- an adapter for connecting a feed container,
- a safety valve for relieving excess pressure in the event of an emergency inside the chamber,
- elements of the pressure control system, shut-off valves.
The working sections of the separator are equipped with doors. When the doors are open, free access to the working area of ​​the section is provided. Each section is equipped with a door interlock on the side of the corona electrodes. The interlock is performed by a limit switch. When the doors are opened, the control circuits are broken and the electrical equipment of the separator is de-energized.
The process sections of the separator are made in the form of welded housings, which when assembled represent a sealed separator housing. The separator housing contains: a distributor with built-in electric heaters, a feeder with a grooved roller, corona electrodes, collecting electrodes, brushes, cutoff valves, and a cutoff valve attachment.
The cutoff valves are located under the collecting electrode. The cutoff valves are made of plates fixed on axles. The axles of the cutoff valves are equipped with locks that ensure adjustment of the cutoff valve position when adjusting the separator and fixation of their position.
The corona electrodes are made in the form of a steel pipe equipped with a row of needles oriented along the surface of the drum. The corona electrodes are installed on insulators fixed to the walls of the sections. The corona electrodes and precipitation electrodes form the main working units of the separator. High voltage is supplied to the corona electrodes. A corona discharge occurs between the corona and precipitation electrodes.

A flange for connecting the feed container is located on the separator cover. Flanges for connecting the discharge containers are located at the base of the discharge section.
The following are installed on the outer walls of the process sections: a feeder drive, precipitation electrode drives, brush drives, and cutoff locks. Inspection windows are located in the section housing, designed to monitor the separation process.
The feeder drive and precipitation electrode drives have an adjustable rotation frequency in order to establish the optimal operating mode of the separator depending on the parameters of the separated material.
The electrical equipment of the separator is selected in accordance with the following requirements:
- the room where the separator is installed is dry,
- the electrical equipment structurally connected to the separator is made in a closed design,
- the voltage of the power circuits is 380 V, the voltage of the control circuits is 220 V, the rectified high-voltage voltage is 5-20 kV.
The electrical equipment includes:
- the electrical equipment of the separator,
- the separator control cabinet,
- the high-voltage source cabinet.

The separator control cabinet is made autonomous and is installed in a place convenient for maintenance.
The high-voltage source cabinet must be located in the immediate vicinity of the separator.
The electrical circuit ensures the operation of the separator in automatic mode. The separator can be started both from the separator control cabinet and from the central control panel of the USG-1 unit.