RU2182041C2 - Method and device for wet gravity separation of finely divided materials with help of creation of continuous medium - Google Patents

Abstract

FIELD: wet separation of finely divided ores for efficient recovery of noble metals from stail tailings and obtaining of qualitative concentrates of ores of nonferrous and ferrous metals, and also from nonmetallic ores, for instance, for recovery of gold, silver and platinouds in systems of acting concentrating mills. SUBSTANCE: initial material is supplied onto movable pan where heavy particles are drown in water. Created in mass o heavy medium is interlinked branches of continuous medium to create process of separation into heavy and less heavy fractions in course of concentration in form of involving in circulation of separated sufficiently heavy particles of heavy medium and heavy particles of separated material. Nondrown light fraction is disposed to tailings through overflow lip and through drain tube located in center of pan. Concentrate is formed due to accumulation and cave-in of heaviest fraction. EFFECT: improved gravity separation of finely divided particles. 2 dwg

Description

 The method and device relate to the field of wet separation of finely ground ores and are intended for the efficient extraction of precious metals from stale tailings, for the production of high-quality concentrates from non-ferrous and ferrous metals, as well as for the enrichment of non-metallic ores, for example, for the extraction of gold, silver and platinoids in active ore dressing schemes factories.

 A known method for the selective separation of heavy minerals and metals and a device for its implementation, RF patent 2123386, including separation at different rates of precipitation in the field of gravitational forces, exposure to an upward flow of liquid, giving movement to the source material, characterized in that the separation at different rates of deposition is carried out over loosened heavy medium, the movement and mixing is carried out on a plate of a moving base in non-parallel planes around a vertical axis. This analogue is the closest technical solution for the proposed method.

 Common signs are: imparting movement to the source material, exposure to an upward flow of liquid, separation over a loosened heavy medium in an enrichment chamber installed with the possibility of movement.

 Disadvantage: separation by different precipitation rates is an inefficient method, the loosened heavy medium is not considered as a continuous medium, there is no forced separation in a continuous medium, there is no forced flooding in the upper layers of the material to be separated, there is no special arrangement of nozzles for supplying loosening water to create a swirling flow in the thickness heavy environment and there is not enough of them, there is no forced movement of the enrichment chamber in the form of combined rotation at once in two mutually perp dikulyarnyh planes.

 A device for the selective separation of heavy minerals and metals is known, RF patent 2123386, containing a tray with a slope towards the discharge side with a drain threshold and with a discharge hole in the bottom under a tapered recess, water fittings installed in the walls of the tray, a swing drive in the form of a movable plate, a suspension of steel strips with an adjustable threaded connection, a loosened heavy medium with the possibility of movement as an element of the device. This analogue is the closest technical solution to the claimed device.

 A solid is known as part of a liquid, the newspaper "Science in Siberia", 34, 1999. V. Starovoitov "In the mirror of numbers and equations."

 It is known that the applied acceleration, as it were, enlarges the grains of minerals, and the finer they are, the higher this effect. "Mountain Journal", 4, 1997, A.V. Bogdanovich "Separation of mineral particles in centrifugal fields."

 The equation of the general case for continuous media is known R. Feynman, R. Leighton, M. Sande "Feynman Lectures in Physics", vol. 7 / Physics of continuous media /. - M., 1977, p. 259. In particular cases, this is either a diffusion equation or Helmholtz theorem, in any case, has the same physical meaning: conservation of angular momentum for a real liquid medium.

 Falling flows of vertical mass transfer are known. V.V. Karmazin et al. "New methods for the extraction of fine gold in the development of placer and man-made deposits." Mountain Journal, N 5, 1999.

 The inventive method of wet separation of finely divided materials by density by creating a continuous medium allows to obtain high-quality concentrate of ores of non-ferrous and ferrous metals, as well as non-metallic ores with sufficient efficiency.

 Effect: separation of finely divided particles by density.

 The method of wet separation of finely divided materials by density by creating a continuous medium involves imparting movement to the source material, creating swirling flows in the thickness of a heavy medium, separation above a heavy medium in an enrichment chamber installed with the possibility of rotational vibrations, removal of light particles to drain.

 The peculiarity lies in the fact that the shared material is flooded in the upper layers of a heavy medium, the enrichment chamber is moved in the form of combined rotational vibrations in two mutually perpendicular planes at once, they are exposed to an upward flow of liquid from several nozzles directed onto the conical surface of the enrichment chamber and installed in thicker than a heavy medium, create interconnected branches of a continuous medium in the thickness of a heavy medium, where each branch of a continuous medium consists of independent a swirling flow from a suspension of sufficiently heavy particles and particles of a solid material to be separated, and particles of a material to be separated and rather heavy particles mixed with it are an integral part of a continuous medium branch and have a particle size depending on the angular momentum or density, the particles are not separated by draining heavy particles that have fallen into the thickness of such a branch of a continuous medium create an enrichment process in the form of involving already separated rather heavy particles of heavy medium into the circuit and heavy particles segregated material to form a concentrate due to the accumulation and collapse of the most heavy fraction.

 A device for wet separation of finely divided materials by density contains a tray with a slope towards the discharge side with a drain threshold and with a discharge hole in the bottom under the tapered recess and water supply pipes, water fitting pipes installed in the walls of the tray, a swing drive in the form of a movable plate, tray suspension, heavy environment with the ability to move as an element of the device.

 The peculiarity lies in the fact that the tray has a hinged device for flooding the material to be shared, nozzles for supplying water in the thickness of the material to be separated, directed to the conical surface of the tray, the drain pipe in the center, the heavy medium has interconnected branches of a continuous medium from suspended sufficiently heavy particles and particles of material to be separated, which are an integral part of the branch of a continuous medium, the drive plate is mounted with the possibility of rotational vibrations in two mutually perpendicular pl knock off.

 In FIG. 1 shows a longitudinal section of a tray with mounted nozzles, showing the suspension of the tray to the movable plate, the drive and the suspension of the movable plate.

 Figure 2 shows a top view of the tray and its location relative to points A, B, C, D of the suspension of the movable plate.

 The enrichment chamber in the form of a washing tray 1 is suspended on a flat movable plate 2 using four rods 3 with shock absorbers 14 at the ends fixed symmetrically around the circumference. The plate with the tray suspended on it is installed with the possibility of rotational vibrations on the springs 4 at points A, B, C, D, located on the same circle and symmetrically on the movable plate 2 (Fig. 2). The plate is installed with the possibility of rotational vibrations around the axes A, C and B, D due to compression and expansion of the springs 4 and due to the adjustable ball bearings 16 under the influence of inertial forces arising from the rotation of the imbalance 5 fixed above the tray. Tray 1 (Fig. 1) contains a looped pipe with holes 6 for supplying loosening water to a conical surface 15, a drain threshold 7, a drain pipe in the center 8 for better removal of light particles with a flat outlet to drain 9, a nozzle for discharge of concentrate 10 with a cut-in a flange pipe 11 into it. The tray as a working element contains interconnected branches of a continuous medium 12. The raw material in the form of a pulp containing thin heavy particles of a valuable component is fed into such a movable tray. They act on the starting material with water from the mounted nozzles 13 at the pulp feeding section, achieving the flooding of particles that are heavy enough for this in a heavy environment. Interconnected branches of the continuous medium 12 are created in the thickness of the heavy suspension, which creates the process of separation into the light and heavy fractions and the enrichment process in the form of involving the heavy fraction and sufficiently heavy and small particles of the heavy suspension into the circuit from top to bottom. The not sunk lighter fraction is discharged into the tails through the drain threshold 7 and through the drain pipe 8 located in the center of the tray. The heaviest particles accumulate and fall off, forming a concentrate at the bottom of the tray, which is washed upward from the branch pipe of the strip 11 and periodically dumped through the pipe to discharge the concentrate 10.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed invention:
- a tool embodying the claimed device in its implementation, is intended for use in industry, namely in the enrichment of minerals in the mining industry;
- for the claimed device in the form as described in the independent clause of the claims, the possibility of its implementation using the means and methods described in the application and known prior to the priority date is confirmed;
- a tool embodying the claimed invention in its implementation, is able to ensure the achievement of the perceived by the applicant technical result.

Claims (2)

 1. The method of wet separation of finely divided materials by density by creating a continuous medium, including imparting movement to the source material, creating swirling flows in the thickness of a heavy medium, separation above a heavy medium in an enrichment chamber installed with the possibility of rotational vibrations, discharge to discharge of light particles, characterized the fact that they carry out the flooding of the shared material in the upper layers of a heavy medium, the movement of the enrichment chamber is carried out in the form of combined rotational vibrations in two In the most perpendicular planes, they act with an upward flow of liquid from several nozzles at once directed to the conical surface of the enrichment chamber and installed in the thickness of a heavy medium, create interconnected branches of a continuous medium in the thickness of a heavy medium, where each branch of a continuous medium consists of an independent swirling flow from a suspension of sufficiently heavy particles and particles of solid material to be separated, and particles of material to be separated and rather heavy particles mixed with it are composite part of a branch of a continuous medium and have a particle size depending on the angular momentum or density, separate the particles due to the removal of insufficiently heavy particles falling into the thickness of such a branch of a continuous medium, create an enrichment process in the form of involving already separated sufficiently heavy particles of a heavy medium into the circuit and heavy particles of material to be separated, form a concentrate due to the accumulation and collapse of the heaviest fraction.  2. A device for wet separation of finely divided materials by density, containing a tray with a slope towards the discharge side with a drain threshold and with a discharge hole in the bottom under a tapered recess and water nozzles, water fittings installed in the walls of the tray, a swing drive in the form of a movable plate suspension of the tray, a heavy medium with the possibility of movement as an element of the device, characterized in that the tray has a hinged device for flooding the material to be shared, nozzles for supplying water in the thickness p of the material being created, directed to the conical surface of the tray, the drain pipe in the center, the heavy medium has interconnected branches of the continuous medium from suspended sufficiently heavy particles and particles of the shared material that are an integral part of the branch of the continuous medium, the drive plate is installed with the possibility of rotational vibrations immediately in two mutually perpendicular planes.

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