A method of enrichment of heavy minerals and metals and centrifugal vortex hub for its implementation

 

The invention is used for the enrichment of raw materials in the processing of placer and lode deposits, containing very fine and fine fraction heavy valuable components. The method and apparatus can effectively capture very fine and fine heavy particles of minerals and metals, to reduce the consumption of fresh water, to provide the opportunity to work on the more dense slurries. The pulp serves tangentially between coaxial cylindrical parts of the body of the hub and the bowl hub, the nozzle in the form of ejector for imparting rotational motion of the pulp from the top down. The bowl has a lining on the inner surface and the taper with decreasing diameter from the cylindrical part. The bowl is mounted on the shaft for rotation so that covers your bottom Central drain pipe. On the drive shaft of the bowl near the cap hub installed impeller for pre-acceleration of the pulp. Swirling down the pulp is then moved in an upward swirling vortex flow between the Central drain pipe and the inner surface of the thicket hub. The concentrates from the working surface of the body of the hub and the inner surface of the bowl constantly str is bornik. Take away the light fraction in the stream of pulp, directed in the opposite direction to the action of centrifugal forces in the vertical drain pipe. 2 S. and 2 C.p. f-crystals, 1 Il.

The invention relates to the field of wet separation of especially fine particles density, which due to the small difference in weight can not be separated normal gravitational processes, used for enrichment of raw materials in the processing of placer and lode deposits, containing very fine and fine fraction heavy valuable components.

Known hydrostatic separator Nelson, P. O. Burt "the gravity separation Technology", M.: Nedra, 1990., page 388., which consists of a cone with a double corrugated walls. The pulp enters the vessel through an axial feed tube and flows up and out on rifles. Light particles go in the tails and heavy going behind the riffles. Compaction of the particles is prevented by the water supplied from the outer casing through a series of holes in the inner conical tube. Water effectively loosens layer of heavy particles, which allows to rotate at a higher speed. The separator combines centrifugal force and back pressure of the introduced water.

YMI special compucom cone. Cone develops a significantly higher centrifugal force and the concentration of the material occurs when promoting material on the cone. This flow of the pulp in the hub under the action of centrifugal force separates liquid and solid component. During the movement of the bed of solid particles from small domestic to large-diameter light particles are carried in the tails, heavy accumulate in the cylindrical receiver at the top of the cone. For flushing concentrate only need a small amount of water. Meals are served in a Central hole and is accelerated by the impeller. The material under the action of centrifugal force is divided by the specific weight on the lined surface of the rotor. The heavy fraction is accumulated in a special section. The hub of periodic action. The concentrate produced in the lower part of the installation.

Deficiency: insufficient washing of the concentrate from the waste rock; high consumption of fresh water; insufficient efficiency of recovery of fine gold; there is almost no recovery of the fine gold of less than 5 microns; removal of light fractions is carried out in the direction of the centrifugal force, which leads to the inevitable removal of heavy thin fries which prepare shared material by dilution of the ejection under the action of jets of water in the tank to give rotational motion of the pulp between two coaxial vertical cylindrical guide surfaces, form and attach the stationary motion of liquefied severe environment in the longitudinal and vertical directions with the formation of the spiral motion of the flow between two coaxial cylindrical surfaces, which are forming and directing, creating in the process of moving viscous flow of the pulp on its original site vortex overflow funnel with a vertical drain pipe in the center, separating the light fraction on the vortex overflow funnel to drain in a vertical cylindrical pipe, separate particles on the deposition rate on the guides cylindrical surfaces on the site of the vortex overflow funnel, capture emitted particles in the hole for discharging the heavy fraction. This method is the closest analogue of the claimed method and has the following characteristics: gives the rotational movement of the pulp between two coaxial guide surfaces of rotation, removal of light fractions in the vertical drain pipe in the center, the division of particles, their deposition on the guide surfaces of rotation, the capture of emitted particles in the hole for discharging the heavy fraction.

Disadvantage: lack of effectiveness of the trapping thin the tent RF 2123883) comprises a cylindrical housing with a drain pipe in the center, the pipe supply pulp, an outlet for discharge of concentrate vortex flow of the pulp between the two forming and directing coaxial cylindrical surfaces. This analog is the closest technical solution.

Disadvantage: no devices to extract trudnowski fine heavy particles of valuable components.

It is known that the simultaneous action of two processes very effectively, because by centrifugation of the particles with the same mass but of different size, allocated in the total product, which is then subjected to the cleaners in a pulsating stream of water and is separated into light and heavy fractions. L. A. Mitin, and other "centrifugal jigging machine CMA-1" Mining magazine, 2, 1997., pages 43-45.

The advantage of the inventive centrifugal-vortex hub is to increase the efficiency of trapping very fine, fine heavy particles of minerals and metals; reducing consumption of fresh water, the opportunity to work on the more dense slurries.

Effect: the separation of very fine, thin particles according to density; the possibility of concentrating the valuable heavy components with a high content in concentrate. A method of obtaining a concentrate, when cotot light fraction in the vertical drain pipe in the center, separate particles according to their deposition on the guide surfaces of rotation, catch emitted particles in the holes for discharging heavy fraction.

The peculiarity lies in the fact that serves the shared material tangentially on a tangent between the body of the cylindrical part of the hub and the outer side surface of the bowl hub mounted rotatably installed in the center of the hub, form and give movement to the source material in the form of a swirling circulation from top to bottom at an angle of taper from 0 to 30odepending on performance and granulometrically, mineralogical characteristics of the feedstock, separate particles based on their weight due to the swirling flow of the partial pulp on the working surface of the body of the hub, displayout Neulovimye fine particles of heavy minerals and metals in an upward swirling vortex flow between the bowl of the hub and the Central drain pipe due to the impact on the shared particles centrifugal forces compressing the particles to the interior lined with the working surface of the bowl hub with impact on the pressed particles swirling flows, constantly is concentrator in concentrateing, take away the light fraction in the stream of pulp, aimed in the opposite direction to the action of centrifugal forces in the vertical drain pipe in the center.

Device for receiving the concentrate comprises a cylindrical housing with a drain pipe in the center, pipe supply pulp, an outlet for discharge of concentrate, a vortex flow of the pulp between the two forming and directing coaxial surfaces of revolution. The peculiarity lies in the fact that the cylindrical hub has a top cover with a bowl hub, mounted on a shaft mounted for rotation and located at the center so that covers the Central drain pipe above his head pinned to the bottom of the drive shaft out, and the bowl of the hub is tapered with a decreasing diameter of the bowl from the cylindrical part to the outside and on the inside working surface of the lining has an impeller mounted for rotation on the drive shaft of the bowl hub area cap hub for pre-acceleration of the pulp, bowl hub is a device for adjustment of the depth of lower side relative to the annular bottom of the hub and gap maidenly tangent to the cylindrical generatrix of the body of the hub, the introduction of a pipe for supplying water transport in the form of an ejector, is the injector poloska concentrate with internal working surface of the bowl hub.

The drawing shows a diagram of the filing of the shared material in the working volume of the cylindrical casing centrifugal-vortex hub, the flow path of the shared material and the circuit output divided material into and out of the bowl hub; kinematic scheme bowl drive hub and impeller on the same drive shaft; a circuit for supplying fluidizing water and water for flushing concentrate: concentrateing connected by pipes displacement of the cylindrical body; the cylindrical body of the hub is closed at the top by a cover, a drive shaft mounted on the center of the cover, with the possibility of rotation.

POS.1. - cylindrical body of the hub; POS.2. -cover that covers the cylindrical body; POS.3. a nozzle for supplying a partial pulp; POS.4. a pipe for supplying water transport; POS. 5. - drive shaft mounted at the center of the cover with the possibility of rotation; POS. 6. - bowl hub mounted on the drive shaft with a decrease in the diameter of the Cup from the bottom to the outside; POS.7. - the drain pipe in the center to output the waste slurry; POS.8. a pipe for supplying washing the concentrate in rnic;
POS.12. - outlet for collecting concentrate
POS.13. - socket poloska;
POS.14. - impeller;
POS.15. ring the bottom of the hub;
POS.16. - adjusting device of the gap of the bowl.

Example: the source material in the form of a slurry that contains heavy components with a particle size of 2 mm, is fed through a nozzle for supplying a partial pulp POS.3, which further diluting and pre-accelerate the flow of slurry transport water supplied through the pipe, put it in the form of ejector POS.4, mounted tangentially on a tangent to the cylindrical generatrix of the body of the hub POS.1. The pulp is pre-formed between the inner surface of the housing hub and the outer surface of the bowl hub POS.6, and through the impeller POS. 14 mounted for rotation and mounted on the drive shaft POS.5 bowl hub. Get the concentrate ring on the bottom of the hub POS.15 and divert it through the pipes to drain concentrate POS.10 concentrateing POS.11. Pulp with nedosvechennye fine heavy particles of valuable components, past the lower annular portion of the hub, served from the bottom up, in the form of scrutineering bowl hub POS.6. Get the concentrate of nedosvecheny in the first cycle of trapping fine heavy particles of valuable components, on the inner lining part of the Cup. The accumulation of concentrate, periodically dropping his ring on the bottom to drain through the pipe o concentrate POS.10 consecratory. Waste slurry with a light fraction in the form of a swirling vortex flow away in the opposite direction of the centrifugal force due to the vortex in the Central drain pipe located in the center of the hub POS. 7.

Complete removal of the concentrate is carried out by stopping the feed of the pulp and stop the rotation of the bowl hub, washing the inner working surface of the hub water supplied through the feed pipe transport water poses 4. Hold wash concentrate with a lined surface of the bowl sprayed jets of water supplied through the nozzle POS.9., turn the bowl hub axis of rotation. The concentrates from the working surfaces of the hub and the bowl away through pipes reset concentrate POS 10 concentrateing POS.11. The adjustment process is done by special screw device POS.16, adjust the clearance between the bottom of the bowl and the Central drain pipe hub POS.7.


Claims

1. Method for wet separation of especially fine particles density, including the production of concentrate, which impart a rotational movement of the pulp between two coaxial guide surfaces of rotation, placing a light fraction in the vertical drain pipe in the center, separate particles according to their deposition on the guide surfaces of rotation, catch emitted particles in the hole for discharging the heavy fraction, wherein serves partial material tangentially on a tangent between the body of the cylindrical part of the hub and the outer side surface of the bowl hub mounted rotatably installed in the center of the hub, form and impart movement to the source material in the form of a swirling circulation from top to bottom at an angle of taper from 0 to 30odepending on performance and granulometric, mineralogical characteristics of the feedstock, separate particles based on their weight due to the swirling flow of the partial pulp on the working surface of the body of the hub, displayout Neulovimye fine particles of heavy minerals and metals in the action in the partial pieces of centrifugal forces, compressing the particles to the interior lined with the working surface of the bowl hub with impact on the pressed particles swirling flows, continually catch the concentrate with the working surface of the body of the hub and working with the inner surface of the bowl hub in concentrateing, placing a light fraction in the stream of pulp, directed in the opposite direction to the action of centrifugal forces in the vertical drain pipe in the center of the hub.

2. A device for implementing the method according to p. 1, containing a cylindrical housing with a drain pipe in the center, pipe supply pulp, tube for collecting the concentrate, the vortex flow of the pulp between the two forming and directing coaxial surfaces of revolution, characterized in that the cylindrical hub has a top cover with a bowl hub, mounted on a shaft mounted for rotation and located at the center so that covers the Central drain pipe above his head pinned to the bottom of the drive shaft out, and the bowl of the hub is tapered with a decreasing diameter of the bowl from the cylindrical part to the outside, and on the inside working surface of the lining, has the of narrator, to pre-disperse the pulp bowl hub is a device for adjustment of the depth of lower side relative to the annular bottom of the hub and the gap between the bottom of the bowl and the Central drain pipe for process control, is tube feeding pulp, mounted tangentially to the cylindrical generatrix of the body of the hub, the introduction of a pipe for supplying water transport, in the form of an ejector that has a nozzle poloska concentrate with internal working surface of the bowl hub.

3. The device according to p. 2, characterized in that the drive rotation of the bowl hub has the ability to adjust the speed.

4. The device according to p. 2, characterized in that the Central discharge tube of the hub at the point of overflow has a removable nozzle.

 

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