RU2094123C1 - Centrifugal separator - Google Patents

Abstract

FIELD: separation of materials. SUBSTANCE: separator consist of working chamber 1, hollow shaft 2 fixed on base 3. The working chamber is mounted for permitting rotation about the shaft due to bearing unit 4. On the bottom of working chamber is rotor 6. The space of the rotor is connected with the space of shaft 2 through sucking branch pipe 7 and with the working chamber through port 8. Below threshold 9 is a facility for removing concentrate that consists of ring 10 made of flexible material whose density is greater than that of barren rock and less than that of bearing rock. The top edge of the ring is secured to the working surface. Under the ring are openings 11 for discharging concentrate. Around the working chamber are facilities 12 and 13 for collecting concentrate and exhaust pulp. The hollow shaft is connected with branch pipes 14 and 16 for supplying pulp and removing concentrate. The centrifuge is provided with drive 18 and belt drive 20. One pulley is mounted on the shaft of the drive. The other pulley is set in bearing unit of the working chamber. EFFECT: enhanced efficiency. 1 dwg

Description

 The invention relates to centrifugal separators for separating particles of materials of different densities and can be used, for example, for the separation of gold particles from pulp of gold ore.

 Known separator for ed. St. USSR N 1801576, class B 03 B 5/32, publ. 03/15/93

 This separator consists of a conical bowl with flats mounted on the frame and driven by a drive, a loading device in the form of a round pipe and a discharge device in the form of a circular ephemera collector, a device for removing concentrate in the form of a tray rigidly attached to the bowl of an internal coaxial vessel, fixed to the bowl by spacers.

 The separator works as follows.

 Pulp containing a heavy component is fed into the bowl through a loading device. Passing into the cavity formed between the curved surface of the bowl and the coaxial vessel, the pulp is discharged into the ephele collector, and the heavy component remains in the flutes. After passing the sample, the separator is stopped, the coaxial vessel is removed and the concentrate is washed off through the tray.

 The disadvantage of this separator is that it is intermittent. Each time after passing one portion (sample), it is stopped, disassembled, and the concentrate is washed off.

 A known hub (separator) for separating granular material (prototype) according to the USSR patent N 1676440, class. B 03 B 5/32, publ. 09/07/91

 The hub includes a full drum with a working chamber, having a shaft of rotation, a drive connected to the bottom of the chamber, a drive for rotation, a device for feeding pulp to the bottom of the chamber, a drain threshold, a device for draining the spent pulp in the opposite part of the chamber. Device for supporting the drum on the axis. The inner surface of the working chamber has three zones. At the bottom there is a movement zone, at the top there is a drain threshold zone, and between them, a retention zone is parallel to the axis of rotation. In this case, the movement zone and the drainage threshold zone are made expanding towards the retention zone. The slope of the displacement zone to the axis of rotation is 10: 1. The slope of the drainage threshold zone to the axis of rotation is 10 1. The ratio of the length of the displacement, retention and drainage threshold zone is 6 3 1.

 The disadvantage of this separator is similar to the lack of a separator according to ed. St. N 1801576, it is also intermittent, which as a result reduces productivity.

 The object of the invention is solved in a centrifugal separator, which includes a rotatable working chamber, communicated in the bottom with a hollow shaft, having a drain threshold on the opposite side from the bottom and a device for collecting spent pulp fixedly installed around the working chamber, a device for pumping pulp to the bottom the working chamber, a device for flushing the concentrate, the rotation drive of the working chamber. According to the invention, it is equipped with a suction rotor located at the bottom of the working chamber, the cavity of which is connected to the cavity of the hollow shaft and the cavity of the working chamber and located below the drain threshold, a device for removing spent pulp and collecting concentrate, while the cavity of the hollow shaft is in communication with the device for feeding the pulp and a device for flushing the concentrate, the hollow shaft is fixedly mounted, and a device for collecting the concentrate and spent panels is fixedly fixed around the working chamber.

 The proposed solution allows us to solve the problem, since the fixed shaft and the rotating working chamber allow the suction rotor to be placed in the chamber, which ensures continuous pulp absorption due to rarefaction in the rotor cavity. On the walls of the working chamber due to centrifugal forces, the concentrate is released, which moves along the walls of the working chamber to the device for concentrate removal, through which it enters the device for collecting concentrate, and through the washout threshold the spent pulp enters the device for collecting spent pulp.

 The drawing schematically shows the inventive centrifugal separator.

 The separator consists of a working chamber 1, a hollow shaft 2, which is fixedly mounted on the base 3. The working chamber is made to rotate around the shaft, for which it is equipped with a bearing assembly 4 with bearings 5. O-rings (not shown) are installed in the bearing assembly. At the bottom of the working chamber, a rotor 6 is installed. By the suction pipe 7, the rotor cavity is connected to the shaft cavity 2, and through the windows 8 to the working chamber. Below the drainage threshold 9 is a device for concentrate removal, consisting of a ring 10 made of an elastic material, the density of which is greater than the density of waste rock and less than the density of the useful component. The ring with the top edge attached to the work surface. Under the ring are openings 11 for the release of concentrate. Around the working chamber are fixedly mounted devices 12 for collecting concentrate and 13 for spent pulp. The hollow shaft 2 is connected to the pulp feeder and the concentrate flushing device 16. The devices 14 and 16 are equipped with taps 15 and 17. The centrifugal separator is equipped with a drive 18, on the shaft of which a pulley 19 is installed for belt transmission 20. The second pulley 21 is mounted on the bearing assembly 4. The devices 12, 13 are equipped with nozzles 22 and 23 for periodic washing of concentrates and waste.

 Centrifugal separator operates as follows.

 Water is preliminarily poured into the working chamber so as to fill the cavity of the suction rotor 6 and the drive 18 is turned on. After the working chamber has reached the desired speed, the valve 15 on the nozzle 14 is opened. The rotor 6 starts to work in pump mode, sucking the pulp through the shaft cavity 2 into a working chamber. The pulp gradually displaces water from the working chamber, which merges through the drain threshold 9 into the device 13. Due to centrifugal forces, the pulp is stratified. At the walls of the chamber, a layer of a heavier useful component forms, which moves up the surface of the chamber. Since the density of the material of the ring 10 is less than the density of the useful component, the useful component rises to the ring 10, pushes its free edge, and merges through the holes 11 into the device 12. The spent pulp layer is located closer to the center of the working chamber, also rises up and through the drain threshold 9 merges into the device 13. As the devices 12 and 13 are filled, they are periodically released through the nozzles 22 and 23. The working process is continuous. If necessary, the separator is stopped. The working chamber is washed by pouring water from above and opening the valve 17. The concentrate is flushed through the rotor cavity, the shaft cavity and the device 16.

 All of the above confirms that the proposed centrifuge provides continuous operation, i.e. allows you to solve the problem.

Claims (1)

 A centrifugal separator, including a rotatable working chamber communicated in the bottom with a hollow shaft, having a drain threshold on the opposite side from the bottom and a device for collecting spent pulp, a device for feeding pulp to the bottom of the working chamber, a device for flushing of the concentrate, the rotation drive of the working chamber, characterized in that it is equipped with a suction rotor located at the bottom of the working chamber, the cavity of which is in communication with the cavity of the canopy shaft and the working chamber cavity, and a device located under the drain threshold for collecting concentrate and removing spent pulp, while the cavity of the hollow shaft is in communication with the pulp feeding device and the concentrate flushing device, the hollow shaft is fixed and the concentrate collecting device is fixed around working chamber.