RU2147934C1 - Mechanical chute-type sluice box and method of concentration of heavy minerals and metals - Google Patents

Abstract

FIELD: methods and devices for separation of finely-dispersed particles including forming of mobile heavy medium. SUBSTANCE: material to be separated moves over inclined platform suspended from four ropes; platform consists of sectional flushing chutes. Material to be separated is accelerated over inclined surface and total speed of pulp is reduced in groove of each sectional chute. Material to be separated is acted on by flow of water, thus obtaining suspended heavy fraction with smoothly distributed ascending liquid fraction over entire volume of sectional chute; suspended heavy fraction is twisted by tangential supply of water between coaxial cylindrical surfaces; heavy fraction is held on conical underlying surface by circular motion of platform. EFFECT: enhanced efficiency of selection of fine particles. 3 cl, 5 dwg

Description

 Mechanical tray gateway for the enrichment of heavy minerals and metals relates to methods and devices for separating fine particles into a concentrate with the creation of a mobile heavy medium.

 A known method for sorting, in particular ores of minerals in the form of pulp, PCT application 87/03827, B 03 B 5/04; 5/72. According to a method, in particular for enriching a sand material containing gold, the material is fed onto a moving forward profiled surface. During transportation of the material over the surface, forces are continuously applied to it, causing a pulsating movement in the direction of movement of the underlying surface. At the same time provide for the supply of water at an angle of 90 degrees. to the direction of movement of the underlying surface. In this case, the material is under the influence of a component of gravity directed at an angle to the direction of movement of the surface, which is created as a result of the inclination of the underlying surface or its rotation along a circular path. After prolonged treatment on the underlying surface, the concentrate is removed or discarded. Installation for separating minerals from pulp, in particular for processing gold sand, contains a moving flat profiled platform, which receives material and which is moving. In the process of moving the material is continuously exposed to vibration, which causes its pulsating movement, mainly in the direction of movement of the base. At the same time, a water flow is perpendicular to the direction of movement of the base. In this case, the material is affected by gravity directed at an angle to the direction of the platform. The latter also undergoes tilt or rotation. After some time the material is on the table, the concentrate thus obtained is removed or discharged.

 This method is the closest analogue to the claimed method and has the following common features: the movement of the shared material on an inclined platform mounted with the possibility of oscillatory movements, the impact on the moved shared material by inertial forces and gravity, the impact on the shared material by the water flow, giving the platform a circular motion trajectories, separation under the influence of external forces on the underlying surface, periodic discharge of concentrate.

 Disadvantage: there is no decrease in the total flow rate, the impossibility of separating fine particles on the profiled surface, since they remain mobile from the holding effect.

 A device for separating non-magnetic materials by density, ed. St. 1371707, B 03 B 5/70. Inside the body of the device, a central pipe with a cap of non-magnetic material mounted above it is placed coaxially with it. In the area of the upper part of the pipe, the casing is covered by a ring electromagnet. In the body cavity at the level of the electromagnet, a working medium of ferromagnetic material is suspended. The core of the electromagnet is made in the form of a closed magnetic circuit. Opposite pairs of windings are connected to a device made in the form of pairs of current collectors to create a rotating alternating magnetic field. Current collectors are installed between the electromagnet and the direct current source and are alternately powered from the sources through a rotating bipolar collector. The source material falls on the cap and enters the working medium, which is under the influence of a rotating alternating field in a pseudo-fluid state. Particles of the heavy fraction pass through a layer of the working medium and precipitate. Particles of the light fraction, falling into the working environment, float and roll into the pipe.

 Common features: a moving working medium around a central pipe in a pseudo-fluid state with the possibility of rotation in all degrees of freedom.

 Disadvantage: there is no own movement of the device along a circular path.

 Known inkjet hub, ed. St. 1604482, B 03 B 5/70. The invention relates to gravity concentration of ores in a thin layer of pulp.

 The purpose of the invention is to increase the efficiency of enrichment. For this, tapering inclined troughs, product cutters, feeding and unloading devices are installed inside the fixed frame of the concentrator. A drive shaft is mounted on the frame in the bearings. Each trough through a crank mechanism is connected to the drive shaft, and in the upper part - through shock absorbers with a frame. The gutters are installed on the hinges with a vertical axis located under their discharge part. The shaft causes the grooves to rotate around the hinge axes. The combined action of hydrodynamic forces from the material flow and inertial forces from rotational vibrations provides an improvement in the conditions of loosening of the particle layer above the surface of the gutter, intensification of the displacement of light rock particles into the upper layers of the stream and the involvement of a valuable component in the enrichment of fine particles.

 Common signs: cascade of gutters with a loosened catching layer, drive.

 Disadvantage: no forced particle selection.

 Known chamber concentrator, RF patent 2044571, B 03 B 5/70, including a receiving hopper, a distribution tray in the form of an open trough with hatches in the bottom, under which enrichment chambers are located with discharge holes installed with a gap to the bottom and dividing them into two compartment, one of which is blocked by a sieve, partitions and an oval-shaped bottom with a bias towards the discharge side, characterized in that it is equipped with a water fitting pipe installed in the end wall of the head of the distributor tray, installed above the hatches downstream irrigation water connected to the lower part of the enrichment compartment not covered by a sieve with an upstream water pipe, control gate and swing drive, while the partitions in the enrichment chambers are vertical, the bottom of the distributor tray is covered with linoleum, the sieves are made with different cell sizes, discharge openings in the bottoms of the chambers enrichment is made with locking devices. The hub is characterized in that it is equipped with articulated rod suspensions of the dispenser tray with an adjustable threaded device.

 This analogue is the closest technical solution and has the following common features: an inclined platform with a working surface from a cascade of enrichment chambers with discharge openings, a sieve overlapping the enrichment chambers, with a slope towards the discharge side, a water supply line, a downcomer irrigation pipe, pipes for creating an upward flow , tilt platform suspension with tilt adjustment.

 Disadvantage: there is no rotation of the heavy medium in the enrichment chamber for the forced selection of fine particles.

 The method and device for the enrichment of heavy minerals and metals "Mechanical tray lock", in contrast to the known technical solutions, allow fine particles to be selected with sufficient efficiency without pulling them off with the main more mobile mass of the material to be separated.

 EFFECT: creation of directed movement of fine particles through a suspended heavy fraction to form a concentrate, provided that they have a higher specific gravity or a greater moment of inertia.

 A method for enrichment of heavy minerals and metals includes moving the material to be separated along an inclined platform, which is installed with the possibility of oscillatory movements, acting on the moving material to be separated by inertial forces and gravity, acting on the material to be separated by the flow of water, giving the platform movement in a circular path, separation under the influence of external forces on the underlying surface, periodic discharge of the concentrate.

 The peculiarity lies in the fact that the material to be separated is moved along an inclined platform consisting of composite washing trays, the material to be separated is dispersed on the inclined surface of each composite tray and the overall pulp flow rate in the recess of each composite tray is reduced, the external effect is imposed from the side of the movable working surface of the platform, suspended on four cables, the moving material is affected in each composite tray by both gravity and ascent, on the material to be shared in zdeystvuyut each composite tray water stream to produce a weighted heavy fraction with uniformly distributed ascending liquid phase in the whole volume of the composite tray weighted heavy fraction unwind tangential supply water between the coaxial cylindrical surfaces, the heavy fraction is maintained in suspension in the conical spreading surface circular platform movement.

 The device for the enrichment of heavy minerals and metals contains an inclined platform with a cascade of enrichment chambers with discharge openings, a sieve overlapping the enrichment chambers with a slope towards the discharge side, a water supply line, a downward irrigation pipe, a pipe for creating an upward flow in each enrichment chamber, and a suspension inclined platform with angle adjustment, drive movement.

 The peculiarity lies in the fact that the inclined platform is installed with the possibility of moving along a circular path, the working surface of each enrichment chamber is made in the form of a composite combined tray, consisting of four flat surfaces forming a recess between the long and short flat surfaces, and two side surfaces with forming tray, flat surfaces mate a conical surface, resting on a cylindrical surface with a flat bottom, on which a cylinder with a con By means of a divider, each enrichment chamber has a water inlet pipe mounted tangentially in the cylindrical part of the enrichment chamber to untwist the heavy fraction between the cylindrical surfaces of the enrichment chamber and brought in from above in the direction of travel, the suspension of the inclined platform looks like four cables, the drive of movement has the form of an imbalance installed the possibility of rotation and fixed under the bottom of the inclined platform, or the type of eccentric mechanism.

 The peculiarity lies in the fact that the motion drive has the ability to adjust the amplitude and frequency of oscillations by selecting the imbalance and the number of revolutions of the electric motor.

 In FIG. 1 shows a longitudinal section of a mechanical tray lock, which shows the platform, suspension, water supply scheme, tail drainage scheme, concentrate collection scheme, the location of enrichment chambers in the form of composite combined trays mounted on the platform.

 In FIG. 2 is a plan view of the working surface of the mechanical tray lock platform, showing the arrangement of the composite combination trays.

 In FIG. 3 is a cross-sectional view of a mechanical tray lock and drive.

 In FIG. 4 shows a diagram of the supply of untwisting water, a diagram of the supply of upward flow to the pipe for discharge of concentrate.

 FIG. 5 is a cross-sectional view of a mechanical chute lock that shows the placement of nozzles for untwisting water and the placement of a nozzle for discharge of concentrate.

 The following designations are accepted: 1 - sieve; 2 - cable; 3 - the base for the suspension platform of the channel lock; 4 - groove of the nugget trap; 5 - a box of a channel lock; 6 - platform; 7 - drive; 8 - transverse channel; 9 - enrichment chamber in the form of a combined composite tray; 10 - highway for a regulated supply of transport water; 11 - pipes downward irrigation; 12 - a chute for discharge of a large fraction; 13 - hole drain waste pulp in the form of a light fraction; 14 - hinge; 15 - the long plane of the tray; 16 - a short plane of the tray; 17 - lateral plane of the tray; 18 - line for supplying water and creating a rotating stream; 19 - highway for supplying water and creating an upward flow; 20 - inner conical surface; 21 - inner cylindrical surface; 22 - outer cylindrical surface; 23 - nozzle for supplying untwisting water; 24 - pipe supply upward flow; 25 - pipe for discharge of concentrate; 26 - bottom of the platform: 27 - imbalance; 28 - a pulley; 29 - a container for collecting concentrate; 30 - flange pipe.

 Example. The source material in the form of pulp enters the sieve 1 (Fig. 1), mounted in the upper part of the inclined platform 6 and performs the function of a screen, is washed out by supplying water from the nozzles of the main for supplying transport water 10 and overhanging washing nozzles of the downcomer pipe 11. Inclined platform 6 (Fig. 1) has a suspension in the form of four cables 2, mounted on a welded base for suspension 3 of the inclined platform 6 of the channel lock. Suspension provides the necessary inclination of a flat platform. The inclined platform has a box-shaped structure of the walls 5, which are chippers and supporting elements for all nodes. The working surface of the platform is made in the form of composite combined trays 9, acting as enrichment chambers and mounted on the transverse channels 8 of the inclined platform 6. The inclined platform is equipped with an inertial drive 7 mounted on the bottom of the platform 26. The drive 7 (Fig. 3) is made in the form of an imbalance 27 , the shaft of which is driven by friction transmission pulley 28. The enrichment chamber in the form of a composite combination tray 9 consists of four flat surfaces forming a recess between the long surface 15 and the short flat surface 16, and two side surfaces 17 (Fig. 2). A conical surface 20 is paired with the tray-forming flat surfaces, resting on the inner cylindrical surface 21 (FIG. 3), inside of which the outer cylindrical surface 22 of the cylinder is closed coaxially, closed by a conical divider and mounted on a common flat bottom. In the bottom part of the cylindrical part of the tray, a top-up water supply pipe 23, located tangentially between the inner cylindrical surface 21 and the outer cylindrical surface 22, is connected from above in the direction of movement of the starting material. (Fig. 5). The pipe for the discharge of concentrate 25 (Fig. 4) has a pipe for creating an upward flow 24, located above and in the direction. The concentrate enters through the hose into a container for collecting concentrate 29, having a nozzle strip 30 (Fig. 4). The amplitude and purity of the oscillations is regulated by the selection of the imbalance or the number of revolutions of the electric motor. The drive can also be made in the form of an eccentric mechanism mounted motionless on the basis of the suspension platform 3 (Fig. 1).

Claims (3)

 1. The method of enrichment of heavy minerals and metals, including moving the shared material on an inclined platform, installed with the possibility of oscillatory movements, the impact on the shared shared material by inertial forces and gravity, the impact on the shared material by the water flow, giving the platform a circular motion path, separation under the action of external forces on the underlying surface, periodic discharge of the concentrate, characterized in that the material to be separated is moved obliquely To the platform consisting of composite washing trays, the material to be separated is dispersed on the inclined surface of each composite tray and the overall pulp flow rate in the recess of each composite tray is reduced, the external action is imposed from the side of the movable working surface of the platform suspended on four cables, the material to be moved is for each composite tray, both gravity and ascent, the material to be shared is affected in each composite tray by a stream of water to obtain a weighted nd fraction uniformly distributed ascending liquid phase in the whole volume of the composite tray weighted heavy fraction unwind tangential supply water between the coaxial cylindrical surfaces, the heavy fraction is maintained in suspension in the conical surface of the underlying platform circular motion.  2. A device for the enrichment of heavy minerals and metals, containing an inclined platform with a cascade of enrichment chambers with discharge openings, a sieve overlapping the enrichment chambers with a slope towards the discharge side, a water supply line, a downward irrigation pipe, a pipe for creating an upward flow in each chamber enrichment, suspension of the inclined platform with adjustable angle of inclination, drive movement, characterized in that the inclined platform is installed with the possibility of movement along a circular path Orientation, the working surface of each enrichment chamber is made in the form of a composite combined tray, consisting of four flat surfaces forming a recess between the long and short flat surfaces, and two side surfaces, with a flat surface forming a tray, a conical surface supported by a cylindrical surface with a flat bottom on which a cylinder with a conical divider is coaxially mounted, each enrichment chamber has a water inlet pipe mounted tangentially in the cylinder ndricheskoy portion enrichment chamber for unwinding the heavy fraction between the cylindrical surfaces of the enrichment chamber and let down from above in the direction of travel, the suspension inclined platform has the form of four cables movement drive takes the form of imbalance, rotatably mounted and fixed under the bottom of an inclined platform, or the kind of the eccentric mechanism.  3. The device according to claim 2, characterized in that the motion drive has the ability to adjust the amplitude and frequency of the oscillations by selecting an imbalance and the number of revolutions of the electric motor.

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