RU142419U1 - MAGNETIC-GRAVITATIONAL-CENTRIFUGAL HUB - Google Patents

Abstract

A magnetic-gravity-centrifugal concentrator having a deck with riffles, a device for supplying power and flushing water, a receiver for separation products located under the deck, a drive mechanism, characterized in that the deck is equipped with magnetic riffles, while the device for supplying power and flushing water made in the form of nozzles with the possibility of supplying both power and flush water to any of the nozzles.

Description

The invention relates to the field of mineral processing and can be used to increase the efficiency of enrichment of small dense minerals.

It is known "Device for collecting fine gold" (patent RU No. 2080937, publ. 06/10/1997). The device comprises a housing in the form of a drum mounted with the possibility of rotation by a certain angle. The case is equipped with flanges and external partitions, forming a series of bathtubs, in which magnetic material is placed, creating a kind of coat of dispersed particles. The fur coat is held by a magnetic field from a chain of magnetic elements inside the case that rotate independently of the latter. Magnetic elements are located within an angle of 180-270 °. In this case, the flanges, the housing and the external partitions are made of magnetically neutral material. The device can be installed at the end of the flushing device. When passing through the pulp, large and light particles pass over the fur coat, and heavy particles of gold penetrate inside it. The disadvantages of the device are the design complexity, high wear of moving parts, the relatively low extraction of dense small particles, the great complexity of operational control and regulation.

It is known "Device for the extraction of fine mineral particles from the mass flow" (patent RU No. 2132745, publ. 10.07.1999). The device comprises an inclined groove with a bottom and top sides, a magnetic system comprising several rows of magnetic elements mounted across the groove under the bottom, and a unloading mechanism. The magnetic system is equipped with two induction gratings and a device for orienting the magnetic elements, and the bottom has lower sides. Moreover, the unloading mechanism is configured to turn the upper and lower gutters. Each induction grating is made in the form of parallel plates of ferromagnetic material mounted above the magnetic elements along the vertical axis of their poles along the flow and interconnected by transverse plates of non-magnetic material. The device for orienting the magnetic elements of each row is made in the form of counterweights, rigidly fixed to the ends of the axis, installed together with the magnetic elements placed on it inside the pipe of non-magnetic material. The main disadvantages of the device are: insufficiently high extraction of small dense minerals, design complexity, low maintainability, large mass, the complexity of operational adjustment and control.

The well-known "Concentration table" (patent RU No. 2249485, publ. 2005.04.10), which includes a support frame, a drive, a diamond-shaped with truncated loading and concentrate ends deck with flutes parallel to the drain edges for unloading light fractions, articulated rod, which includes an elastic element, for example, in the form of springs or rubber parts, elastic oscillating elements on which a deck is fixed through the rod beam, are made in the form of support posts installed with an inclination towards the drive, a slurry receiver, a tapering chamber for preliminary ritelnoy concentration riffles on the side walls, parallel corrugated deck, and a system of thresholds for discharging pre-enriched concentrate, flush water distributor and collection trays dressing products. The deck is structurally divided along the longitudinal axis of the table into two symmetrical, equal, laterally movable working parts, which are equipped with spacers for adjusting their transverse angle of inclination, the latter and the support post under the concentrate end of the deck include jacking devices, for example mechanical or hydraulic .

The main disadvantages of this apparatus are the low efficiency of the separation of small particles, low specific productivity, design complexity.

A known installation for the extraction of valuable minerals (patent RU No. 2187372, published 2002.08.20), combining the principles of enrichment on concentration tables of a conventional type and rotating with the activation of the process of neutralization of the industrial product. The plant for extracting valuable minerals is equipped with a decontamination system containing decontamination decks made with flutes and guide channels and installed under enrichment decks with a radial offset to the common axis, and enrichment decks are equipped with rolling bearings that can be moved along the guide of the wave profile, while supporting decks enrichment is installed under the upper points of the latter and is made with the possibility of regulating the longitudinal and transverse slopes of the decks and with the possibility of rotation around the hinge axes, while the enrichment decks are made in the form of sectors and are mounted with an offset above the troughs for the high density fraction, the trough for receiving the high density fraction is installed under the neutralization decks with the bottom tilted towards the discharge of the high density fraction, and the trough for receiving the low density fraction made of two parts interconnected and installed with the possibility of placing a guide between them, while the bottom of the trough for receiving a low density fraction has an inclination towards the discharge of fractions low density, and the drive is configured to synchronously rotate the distributor of the pulp and water supply system for flushing with enrichment and decontamination decks around a common axis.

The main disadvantages of this device are the relatively low separation efficiency of small and with a slight difference in the densities of the separated components of the particles, the complexity of the design.

The well-known "Gravity-magnetic separator" (US Pat. RU No. 2424060, publ. 07/20/2011), adopted for the prototype, including deck, distribution hopper for supplying power and flushing water, a drive mechanism, receivers for separation products, a magnetic system, characterized in that the deck is made in the form of a disk, which is divided into two or more sectors, each of the sectors is divided into at least two zones of discharge of separation products having successively increasing radii, while the first zone with the smallest radius serves to unload a flax-light product, and each subsequent zone has increasing radii and serves to unload products with increasing density, while the deck is equipped with a high-frequency stepper motor, permanent rotating magnets are located above the deck surface, and the shift angle between the magnetization axes of the neighboring magnets is 110-130 ° .

The main disadvantages of the device are the insufficiently high separation efficiency of especially small particles and the comparative complexity of the design and maintenance.

The technical result of the proposed invention is to increase the extraction of fine dense particles, including those with a low coefficient of sphericity, simplifying the design of the apparatus and its maintenance.

The technical result is achieved in that the magnetic-gravity-centrifugal concentrator has a deck with flutes, a device for supplying power and flush water, a receiver for separation products located under the deck, a drive mechanism, characterized in that the deck is equipped with magnetic flutes, while the device for supplying power and flushing water, it is made in the form of nozzles with the possibility of supplying both power and flushing water to any of the nozzles.

Magnetic corrugations, allow you to create a special high-performance magnetic capture medium above them, which consists of magnetic vibratory units. Flocs are composed of magnetic particles that are either present in the material being enriched, or are added on purpose. Moreover, energy is not spent on creating such a medium, because permanent magnets do not consume energy. Depending on the properties of the material being enriched, the corrugations may protrude above the surface of the deck or be inside it.

The supply of feed and flush water to any of the nozzles allows more accurate separation of the enriched material.

Vibroflocculation media have a high density and are characterized by low values of the coefficient of resistance to movement in the medium and gradient forces, which are the cause of the mutual clogging of the concentrate and tailings. At the moment of collision with the vibroflocula, the particle energy is extinguished, and it sinks to the bottom. Particularly heavy particles under the influence of gravitational force are pressed to the surface of the deck and under the influence of inertial forces arising from the asymmetric movement of the deck are transported to the corresponding discharge windows. Specific light particles that collide with vibro-floccules cannot overcome the action of the Archimedean force; they are transferred by a stream of water through a trapping medium and transported in the radial direction.

Moreover, the claimed device is simpler than the prototype, less often needs to be repaired and is easily amenable to operational adjustment. The inventive device allows to enrich smaller particles.

The design of the concentrator is illustrated by the figure of FIG. 1 which shows a top view of the apparatus and FIG. 2 is a section. Here, the figure shows an apparatus with a round deck (1), equipped with magnetic flutes (2), divided into two symmetrical sectors by an arched partition (3). The device has a device for supplying power and flushing water made in the form of nozzles (4). There is also an annular receiver for collecting separation products, divided into a number of prefabricated windows (5). A trapping medium (6) is formed above the flutes, consisting of magnetic particles that form magnetic flocs.

The hub works as follows. The enriched material from any branch pipe (s) of the power supply device (4) enters the deck (1), flush water is supplied to the deck from the remaining nozzles of the power supply device (4). Deca performs reciprocating asymmetric oscillations. Those. in one direction (in this particular example, clockwise), it moves at a lower speed and acceleration, and in the opposite, at a higher speed and acceleration. Particles on the deck are affected by gravity, hydrodynamic pressure of the water flow, inertia due to the asymmetric motion of the deck, turbulent force, for a concentrator with a circular rotating deck, still centrifugal force and some other forces. A trapping medium is formed above the magnetic riffles from magnetic flocs, which, during the operation of the apparatus, partially loosen - they are destroyed under the action of inertia forces and, in this example, centrifugal force. In this case, specific-light particles are washed off in the radial direction in the direction of the arrow (9). Dense particles are transported to the corresponding zone of the deck under the influence of inertia and unloaded through the appropriate collection windows in the direction of the arrow (8). Particles that are intermediate in density are unloaded in the direction of the arrow (10).

For example, the concentrator was tested on an artificial mixture of tungsten (2%), quartz (83%) and magnetite (15%), the size of the material was 0.071 mm. The averaged results obtained in this case are shown in table 1.

Thus, the inventive hub allows you to increase the extraction of dense particles in the concentrate, while its design is simplified, and ease of maintenance is improved.

Claims (1)

A magnetic-gravity-centrifugal concentrator having a deck with riffles, a device for supplying power and flushing water, a receiver for separation products located under the deck, a drive mechanism, characterized in that the deck is equipped with magnetic riffles, while the device for supplying power and flushing water made in the form of nozzles with the possibility of supplying both power and flush water to any of the nozzles.

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