WO2020220586A1 - Système et procédé de séparation de mélange utilisant une amélioration de fluide - Google Patents

Système et procédé de séparation de mélange utilisant une amélioration de fluide Download PDF

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Publication number
WO2020220586A1
WO2020220586A1 PCT/CN2019/109885 CN2019109885W WO2020220586A1 WO 2020220586 A1 WO2020220586 A1 WO 2020220586A1 CN 2019109885 W CN2019109885 W CN 2019109885W WO 2020220586 A1 WO2020220586 A1 WO 2020220586A1
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Prior art keywords
mineralization
centrifugal
slurry
flotation
separator
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PCT/CN2019/109885
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English (en)
Chinese (zh)
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WO2020220586A8 (fr
Inventor
张海军
刘炯天
闫小康
王利军
刘清侠
李小兵
李丹龙
李鑫
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中国矿业大学
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Priority to AU2019443100A priority Critical patent/AU2019443100B2/en
Publication of WO2020220586A1 publication Critical patent/WO2020220586A1/fr
Publication of WO2020220586A8 publication Critical patent/WO2020220586A8/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1418—Flotation machines using centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1456—Feed mechanisms for the slurry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1468—Discharge mechanisms for the sediments

Definitions

  • the invention relates to a mixing and separation system and method based on fluid intensification, and is particularly suitable for a mixing and separation system and method based on fluid intensification used for separating mineral particles or slime in coal mine processing.
  • the mineral flotation process is a typical flow process, involving the adsorption of particles and reagents, the mineralization of particles and bubbles, and the separation of mineralized bubbles.
  • the essence is a mixing and separation process in which the role of fluid always runs through.
  • the influence of the beneficiation process is increasingly apparent.
  • flotation requires dosing, it also requires energy input. The more difficult the ore is to select, the finer the particle size, the greater the energy required. This requires continuous energy injection as the separation process continues to be strengthened.
  • the fluid-enhanced mixing and separation system of the present invention includes a forced mixing and conditioning system, a turbulent mineralization reaction system, a circulation flotation separation system, and a centrifugal flotation separation system.
  • the quality system includes a forced mixing conditioner and a circulating pump.
  • the forced mixing conditioner has a cylindrical structure. There are multiple jet impingement tubes and multiple jet cross-flow pipes around the barrel. The circulating slurry outlet on the upper part of the barrel is used by the circulating pump.
  • the pipeline is connected to the inlet of the distribution tank, the distribution tank is connected with the jet impingement tube and the jet cross-flow tube by a pipeline, and the quenched and tempered slurry outlet on the upper part of the cylinder is connected to the turbulent mineralization reactor through the pipeline;
  • the turbulent mineralization reaction system A turbulent flow mineralization reactor including a cylindrical structure, a plurality of cross-flow premineralization tubes, a plurality of impinging flow premineralization tubes, and a plurality of first microbubble generators are arranged around the tube, and a vortex generator is arranged inside the tube
  • the turbulent mineralization reactor is connected to the loop flotation separator through a pipeline;
  • the loop flotation separation system includes a cylindrical structure loop flotation separator, which is provided with a jet splitter, a feeder, a slurry distributor and a loop flow generator
  • the middle ore outlet of the circulation flotation separator is connected to the feed port of the forced mixing conditioner through a pipeline, and the foam tank outlet of the circulation flo
  • the hybrid separation system based on fluid enhancement of the present invention is characterized in that it includes a forced mixing and tempering system connected by pipelines, a turbulent mineralization reaction system, a circulating flotation separation system, and a centrifugal flotation separation system.
  • the outlet of the circulating slurry provided in the forced mixing and tempering system is connected to the inlet pipe of the distribution tank of the forced mixing and tempering device through the circulating pump, and the outlet of the tempered slurry is connected to the turbulent flow provided by the turbulent mineralization reaction system through the pipe.
  • the feed port of the mineralization reactor is connected, and the discharge port of the turbulent mineralization reactor provided in the turbulent mineralization reaction system is connected to the feed port of the jet splitter provided in the loop flotation separation system through a pipeline.
  • the separation system is equipped with a bottom middle ore outlet that is connected to the feed port of the forced mixing conditioner through a pipeline, and the loop flotation separator tailing outlet provided in the loop flotation separation system is connected to the centrifugal flotation separation system through a pipeline.
  • Some centrifugal flotation separators are connected to the feed port, and the centrifugal flotation separator foam outlet of the centrifugal flotation separation system is connected to the turbulent mineralization reactor feed port of the loop flotation separation system through a pipeline.
  • the forced mixing and tempering system is provided with a cylindrical forced mixing and tempering device, the tempered pulp outlet and the circulating pulp outlet are respectively arranged on the top of the forced mixing and tempering device, and the forced mixing and tempering device is provided with an outside device.
  • the mass device is equipped, and the slurry generates shearing force in the forced mixing conditioner to strengthen the mineralization effect of the slurry;
  • the turbulent mineralization reaction system is provided with a cylindrical turbulent mineralization reactor, the discharge port of the turbulent mineralization reactor is provided on the top of the turbulent mineralization reactor, and the turbulent mineralization reactor is provided with a bottom.
  • Slurry disperser there are multiple dispersing pipelines around the turbulent mineralization reactor on the pulp disperser, and multiple mineralization pipes are arranged between the dispersion pipeline and the turbulent mineralization reactor;
  • the circulating flotation separation system is provided with a circulating flotation separator, the circulating flotation separator is provided with a circulating flotation separator foam tank at the top, and the lowest part of the circulating flotation separator foam tank is provided with a circulating float
  • the foam tank of the separator, the circular outlet at the top of the foam tank of the loop flotation separator is equipped with a feeder, the feed port of the turbulent mineralization reactor is set on the feeder, and the loop flotation separator is provided with The bottom is equipped with a ring-shaped circulation generator jet splitter.
  • the circulation generator jet splitter (8) is equipped with a Zhongkuang tailings separator, and the Zhongkuang outlet and the circulating flotation separator tailings outlet are set at the Zhongkuang tailings separator.
  • the circulation flotation separator is provided with a jet splitter above, and the feed port of the jet splitter is arranged on the jet splitter.
  • the jet splitter is connected to the jet splitter of the circulation generator through multiple pipes.
  • the circulation generator There are multiple circulation jet holes on the jet splitter;
  • the centrifugal flotation separation system includes a centrifugal flotation separator, the top of the centrifugal flotation separator is provided with a centrifugal flotation separator foam tank, and the foam outlet of the centrifugal flotation separator is arranged at the lowest part of the centrifugal flotation separator foam tank, The top of the foam tank of the centrifugal flotation separator is provided with a stirring transmission mechanism.
  • the feed inlet of the centrifugal flotation separator is arranged on one side of the centrifugal flotation separator and extends into the centrifugal flotation separator through a pipeline.
  • the bottom of the separator is equipped with a gas dispersion box.
  • the gas dispersion box is equipped with a centrifugal flotation separator tailing outlet and a second microbubble generator.
  • a forced circulation centrifugal mineralization generator is installed near the bottom of the centrifugal flotation separator.
  • the forced circulation centrifugal mineralization generator consists of an upper diversion cylinder, a propulsion wheel, a dispersing stator, a centrifugal mineralization wheel and a lower diversion device arranged under the centrifugal mineralization wheel and fixed at the bottom of the tank.
  • the lower diversion device includes a guide The flow inverted cone, the discharging bottom plate and the lower guide tube set in the middle of the discharging bottom plate;
  • the dispersing stator includes a mineralization cover plate and a slurry dispersion plate.
  • the slurry dispersion plate has a rectangular structure and is set under the mineralization cover plate;
  • the discharging bottom plate is set in the centrifugal flotation separator near the bottom, the center of the discharging bottom plate is provided with a lower deflector, and the discharging bottom plate is provided with a plurality of through holes around the center, and the discharging bottom plate and the centrifugal float There is a gap between the outer walls of the separator, the material bottom plate is equipped with a diversion inverted cone, and the diversion cone is equipped with a rectangular structure pointing to the center of the circle and a plurality of pulp dispersion plates arranged vertically.
  • Mineralization cover plate the center of the mineralization cover plate is provided with an upper deflector, and the upper deflector is equipped with a propulsion wheel, wherein the stirring transmission mechanism extends into the mine through the center of the upper deflector and the mineralization cover through the transmission shaft
  • the space between the mineralization cover plate and the discharge bottom plate, the end of the drive shaft is equipped with a centrifugal mineralization wheel in the space between the mineralization cover plate and the discharge bottom plate, and the mineralization cover plate and the discharge bottom plate are equipped with discharge hole.
  • the multiple jet pipes arranged between the forced mixing conditioner and the forced mixing conditioner are alternately arranged jet impingement pipes and jet cross-flow pipes.
  • the multi-branched mineralization pipes arranged between the dispersing pipeline and the turbulent mineralization reactor include alternately arranged cross-flow pre-mineralization pipes and impinging stream pre-mineralization pipes, wherein the cross-flow pre-mineralization pipe and the impinging stream
  • the premineralization tube is equipped with a first microbubble generator
  • the turbulent mineralization reactor is provided with a vortex generator with a plurality of convex structures on the inner wall.
  • the circulation generator jet splitter is provided with a ring plate on the outside, a gap is left on the bottom plate between the ring plate and the outer wall, and the circulation generator jet splitter (8) is provided with a plurality of circulation jet cavities and passes through the circulation jet cavities The injection hole on the upper part produces a circulation.
  • An outer cylinder wall is arranged between the inner ring of the circulation generator jet splitter and the Zhongkuang tailings separator.
  • the outlet direction of the injection cavity is along the inner wall of the ring plate; a feed hole is arranged above the circulation injection cavity, It is connected with the outlet pipe of the jet splitter; the slurry distributor jet splitter is arranged in the middle of the bottom plate, and the jet splitter of the slurry distributor has a cylindrical structure, and the outer cylinder wall is 0.5-1.0m higher than the bottom plate.
  • a hybrid separation method based on fluid enhancement the steps are as follows:
  • the pulp and medicament are fed into the forced mixing conditioner through the pipeline through the feed port of the forced mixing conditioner, and then flow out from the circulating slurry outlet and fed into the forced mixing conditioner distribution tank through the circulating pump.
  • the solid-liquid two-phase system of slurry and medicament is injected into the forced mixing conditioner through jet impingement and jet cross-flow at high speed.
  • the strengthening agent is The adsorption of the surface of the mineral particles of the ore slurry, the circulating ore slurry is equipped with a circulating pump to realize multiple circulation mixing and tempering in the system, and the tempered ore slurry is discharged through the tempered slurry outlet and fed into the turbulent mineralization reactor through the pipeline;
  • the quenched and tempered slurry enters the slurry disperser from the feed port of the turbulent mineralization reactor, and is fed into the turbulent mineralization reaction through the cross-flow premineralization pipe and the impinging stream premineralization pipe alternately arranged on the dispersion pipeline
  • the turbulent mineralization reaction is provided, the slurry is mixed with air through the first microbubble generator.
  • the three-phase system of air, slurry, and coal particles in the slurry in the turbulent mineralization reactor is in the high-speed impact flow and Under the forced turbulent flow environment dominated by forced shear flow, high-efficiency collisions between fine particles and bubbles are realized, and the efficiency and capacity of the flotation mineralization reaction are enhanced, and then discharged from the discharge port of the turbulent mineralization reactor and fed into the jet splitter through the pipeline. Feed mouth
  • the slurry is fed into the jet splitter through the inlet of the jet splitter, and is fed into the circulation generator jet splitter through the jet splitter from multiple pipes, and the slurry is sprayed out from the circulation jet cavity of the circulation generator jet splitter.
  • a circular flow is formed between the barrel wall and the ring plate to further strengthen the flotation recovery effect of difficult-to-float particles.
  • the underflow product separated by the jet splitter of the centrifugal flotation separator is discharged from the tailings outlet of the circular flotation separator as the final tailings.
  • the separated medium ore is discharged from the medium ore outlet and fed into the feed port of the forced mixing conditioner through a pipeline.
  • the discharged tailings slurry is fed into the feed inlet of the centrifugal flotation separator through the pipeline, and the circulating flotation separator is set up
  • the froth tank of the circulating flotation separator at the top collects the overflowing foam and discharges it as a concentrate product from the outlet of the foam tank of the circulating flotation separator;
  • the tailings slurry is fed from the inlet of the centrifugal flotation separator into the centrifugal flotation separator, the jet splitter enters the upper guide tube, and the propelling wheel is pushed into the space between the mineralization cover plate and the discharge bottom plate.
  • the centrifugal mineralization wheel in the space rotates under the drive of the agitating transmission mechanism through the transmission shaft, so that the tailings slurry is continuously produced in the tailings slurry under the action of the centrifugal mineralization wheel along the rectangular slurry dispersing plate and the deflector inverted cone With the rising buoyancy, a foam layer is formed on the top of the rising tailings slurry, which is finally discharged from the foam outlet of the centrifugal flotation separator of the foam tank of the centrifugal flotation separator, and fed into the feeder of the circulation flotation separator through the pipeline Repetitive separation at the outlet.
  • the tailings slurry of the centrifugal flotation separator jet splitter at the attachment of the discharge bottom plate is difficult to select particles, and flows out through the discharge hole on the discharge bottom plate, and a part of the difficult particles are separated by centrifugal flotation in the gas dispersion box
  • the tailings outlet of the device is discharged, and another part of the difficult-to-select particles is sucked into the space of the centrifugal mineralization wheel under the centrifugal suction force of the centrifugal mineralization wheel through the lower guide tube in the middle of the discharge bottom plate, and is generated when the centrifugal mineralization wheel rotates
  • the centrifugal force continues to generate buoyancy for the tailings slurry, and the refractory particles are dispersed in the slurry to continue circulating.
  • the invention uses multiple turbulence fields to strengthen the mixing and separation process as an entry point, and improves the mixing and separation efficiency of difficult-to-float mineral particles through the reasonable design of the mixing and separation device structure and the mixing and separation process, as well as the reasonable design of the local slurry circulation and the system slurry circulation. And the ability to provide a system to strengthen mineral mixing and separation technology from the perspective of fluid flow.
  • the solid-liquid two-phase system strengthens the adsorption of the agent on the surface of the mineral particles under the action of the high-speed impinging flow and the forced shear cross-flow in the forced mixing conditioner, and the multiple cycles of mixing and conditioning of the slurry inside the conditioner further improve The hydrophobicity of the particle surface is improved;
  • the tempered gas-liquid-solid three-phase system in the turbulent mineralization reactor under the forced turbulence environment dominated by high-speed impinging flow and forced shear flow achieves high-efficiency collisions between fine particles and bubbles, which improves Mineralization effect;
  • the three-phase system after high-efficiency mineralization is sorted by the circulation flotation separator and the centrifugal flotation separator in turn, the mineral products of the circulation flotation separator are returned to the forced mixing conditioner, the mixing and separation process is repeated, and the centrifugation
  • the forced circulation system of the flotation separator further strengthens the flotation recovery of difficult-to-float particles, and the foam product separated by the centrifugal flotation separat
  • Fig. 1 is a schematic diagram of a hybrid separation system based on fluid enhancement of the present invention.
  • Figure 2 is a schematic diagram of the structure of the forced mixing conditioner of the present invention.
  • Figure 3 is a schematic diagram of the structure of the turbulent flow mineralization reactor of the present invention.
  • Fig. 4 is a schematic diagram of the structure of the circulation generator of the present invention.
  • Figure 5 is a schematic structural diagram of the forced circulation centrifugal mineralization generator of the present invention.
  • 1-forced mixing and conditioning system 2-turbulent mineralization reaction system, 3-circulation flotation separation system, 4-centrifugal flotation separation system, 5-forced mixing and conditioning system, 6-circulating pump, 7- Turbulent mineralization reactor, 8-jet splitter, 9-feeder, 10-circulation flotation separator, 11-slurry distributor, 12-circulation generator, 13-centrifugal flotation separator, 14-forced circulation Centrifugal mineralization generator, 15-second microbubble generator, 16-stirring transmission mechanism, 17-gas dispersion box, 18-jet impingement tube, 19-jet cross-flow tube, 20-cross-flow premineralization tube, 21 -Impacting stream premineralization tube, 22-First microbubble generator, 23-Vortex generator, 24-Bottom plate, 25-Outer cylinder wall, 26-Annular plate, 27-Circular jet cavity, 28-Inverted diversion cone , 29-lower deflector, 30-advancing wheel, 31-slurry dispersion plate,
  • the fluid-enhanced mixing and separation system of the present invention includes a forced mixing and tempering system 1, a turbulent mineralization reaction system 2, a circulation flotation separation system 3, and a centrifugal flotation separation system 4 connected by pipelines.
  • the circulating slurry outlet C of the forced mixing and tempering system 1 is connected to the inlet D of the distribution tank of the forced mixing and tempering device through the circulating pump 6, and the tempered slurry outlet B is connected to the turbulent mineralization reaction system 2 through the pipeline.
  • the reactor feed port E is connected, and the turbulent mineralization reactor discharge port F of the turbulent mineralization reaction system 2 is connected to the jet splitter feed port G of the loop flotation separation system 3 through a pipeline, and the loop flotation separation
  • the middle mine outlet J at the bottom of the system 3 is connected to the feed port A of the forced mixing conditioner through a pipeline, and the tailings outlet K of the circulating flotation separator of the circulating flotation separation system 3 is connected to the centrifugal flotation separation system 4 through the pipeline.
  • the centrifugal flotation separator feed port M is connected, and the centrifugal flotation separator foam outlet L of the centrifugal flotation separation system 4 is connected to the turbulent mineralization reactor feed port H of the loop flotation separation system 3 through a pipeline ;
  • the forced mixing and tempering system 1 includes a cylindrical forced mixing and tempering device 5.
  • the tempered pulp outlet B and the circulating pulp outlet C are respectively arranged on the top of the forced mixing and tempering device 5, and the outside of the forced mixing and conditioner 5 is provided with pulp Disperser, the slurry disperser is provided with multiple dispersion pipelines around the forced mixing conditioner 5, and there are multiple injection pipes between the dispersion pipeline and the forced mixing conditioner 5 to inject the slurry into the forced mixing conditioner 5, and make the slurry produce shear force in the forced mixing conditioner 5 to enhance the mineralization effect of the slurry; as shown in Figure 2, the forced mixing conditioner 5 is provided between the multiple dispersion pipelines
  • the multiple injection pipes are alternately arranged injection impingement pipe 18 and injection cross-flow pipe 19;
  • the turbulent mineralization reaction system 2 includes a cylindrical turbulent mineralization reactor 7.
  • the discharge port F of the turbulent mineralization reactor is set on the top of the turbulent mineralization reactor 7, and the bottom of the turbulent mineralization reactor 7 is provided with a slurry disperser.
  • the slurry disperser is provided with multiple dispersion pipelines around the turbulent mineralization reactor 7, and there are multiple mineralization pipes between the dispersion pipeline and the turbulent mineralization reactor 7, as shown in Figure 3.
  • the tube includes alternately arranged cross-flow pre-mineralization tubes 20 and impinging stream pre-mineralization tubes 21, wherein the cross-flow pre-mineralization tube 20 and the impinging stream pre-mineralization tubes 21 are both provided with a first microbubble generator 22, A plurality of vortex generators 23 with convex structures are provided on the inner wall of the turbulent mineralization reactor 7;
  • the loop flotation separation system 3 includes a loop flotation separator 10, the top of the loop flotation separator 10 is provided with a loop flotation separator foam tank, and the lowest part of the loop flotation separator foam tank is provided with a loop flotation separator Foam tank I, circular flow flotation separator foam tank top is provided with a feeder 9, the turbulent mineralization reactor feed port H is set on the feeder 9, the bottom of the circular flow flotation separator 10 is provided with a ring
  • the circular flow generator 12 is equipped with the Zhongkuang tailings separator, the Zhongkuang outlet J and the circular flotation separator tailings outlet K are set on the Zhongkuang tailings separator, and the circular flow separator 10 A jet splitter 8 is provided on the upper side.
  • the jet splitter feed port G is provided on the jet splitter 8.
  • the jet splitter 8 is connected to the circulation generator 12 through multiple pipes, and the circulation generator 12 is provided with multiple circulation jets.
  • a ring plate 26 is provided on the outside of the circulation generator 12
  • a gap is left on the bottom plate 24 between the ring plate 26 and the outer wall
  • a plurality of circulation jet cavities 27 are provided on the circulation generator 12 and pass
  • the nozzle hole on the circulation jet cavity 27 generates a circulation.
  • An outer cylinder wall 25 is provided between the inner ring of the circulation generator 12 and the Zhongkuang tailings separator.
  • the outlet direction of the jet cavity is along the inner wall of the ring plate; the circulation jet cavity 27 is provided above The feed hole is connected with the outlet pipe of the jet splitter 8; a slurry distributor 11 is arranged in the middle of the bottom plate 24, the slurry distributor 11 is a cylindrical structure, and the outer cylinder wall 25 is higher than the bottom plate by 240.5-1.0m;
  • the centrifugal flotation separation system 4 includes a centrifugal flotation separator 13.
  • the top of the centrifugal flotation separator 13 is provided with a centrifugal flotation separator foam tank, and the centrifugal flotation separator foam outlet L is set in the centrifugal flotation separator 13
  • the top of the foam tank of the centrifugal flotation separator is provided with a stirring transmission mechanism 16, and the feed port M of the centrifugal flotation separator is arranged on the side of the centrifugal flotation separator 13 and extends through the pipeline
  • a gas dispersion box 17 is provided at the bottom of the centrifugal flotation separator 13, and the gas dispersion box 17 is provided with a centrifugal flotation separator tailing outlet N and a second microbubble generator 15.
  • a forced circulation centrifugal mineralization generator 14 is provided near the bottom of the centrifugal flotation separator 13.
  • the forced circulation centrifugal mineralization generator 14 includes an upper deflector 32, a propulsion wheel 30, a dispersion stator, a centrifugal mineralization wheel 34 and It is composed of a lower diversion device arranged under the centrifugal mineralization wheel 34 and fixed at the bottom of the tank.
  • the lower diversion device includes a diversion inverted cone 28, a discharge bottom plate 35 and a lower diversion cylinder 29 arranged in the middle of the discharge bottom plate 35
  • the dispersing stator includes a mineralization cover 33 and a pulp dispersion plate 31.
  • the pulp dispersion plate 31 is a rectangular structure and is set under the mineralization cover 33; the specific discharge bottom plate 35 is set in the centrifugal flotation separator 13 near the bottom At the center of the discharge bottom plate 35, a lower deflector 29 is provided.
  • the discharge bottom plate 35 is provided with multiple through holes around the center, and there is a gap between the discharge bottom plate 35 and the outer wall of the centrifugal flotation separator 13 ,
  • the material bottom plate 35 is provided with a diversion inverted cone 29, and the diversion inverted cone 29 is provided with a plurality of slurry dispersion plates 31 with a rectangular structure pointing to the center of the circle, and a mineralization cover plate is provided for each slurry dispersion plate 31. 33.
  • the center of the mineralization cover plate 33 is provided with an upper guide tube 32, and the upper guide tube 32 is provided with a propulsion wheel 30, wherein the stirring transmission mechanism 16 passes through the upper guide tube 32 and the mineralization cover plate 33 through the transmission shaft
  • the center of the shaft extends into the space between the mineralization cover 33 and the discharge bottom plate 35.
  • the end of the drive shaft is provided with a centrifugal mineralization wheel 34 in the space between the mineralization cover 33 and the discharge bottom plate 35, and the mineralization cover
  • the plate 33 and the discharge bottom plate 35 are provided with discharge holes.
  • a hybrid separation method based on fluid enhancement the steps are as follows:
  • the pulp and medicament are fed into the forced mixing conditioner 5 through the pipe through the forced mixing conditioner feed port A, and then flow out from the circulating slurry outlet C and fed into the forced mixing conditioner distribution tank inlet D through the circulating pump 6 ,
  • the solid-liquid two-phase system of pulp and agent is injected into the forced mixing conditioner 5 through jet impingement 18 and jet cross flow 19 at high speed.
  • the pulp and agent are strengthened by the high speed impinging flow and forced shear cross flow during the injection process.
  • the medicament is adsorbed on the surface of the mineral particles of the slurry.
  • the circulating slurry is mixed and tempered multiple times in the system through the circulating pump 6.
  • the tempered slurry is discharged through the tempered slurry outlet B and fed into the turbulent mineralization reactor 7 through the pipeline. ;
  • the quenched and tempered slurry enters the slurry disperser from the feed port E of the turbulent mineralization reactor, and is fed into the turbulent mineralization through the cross-flow premineralization pipe 20 and the impinging flow premineralization pipe 21 alternately arranged on the dispersion pipeline
  • the turbulent mineralization reaction 7 is fed into the slurry and air is mixed into the slurry through the first microbubble generator 22.
  • the three-phase system of air, slurry and coal particles in the slurry in the turbulent mineralization reactor 7 is impinging flow at high speed. Under the forced turbulent flow environment dominated by forced shear flow, it can achieve high-efficiency collision of fine particles and bubbles, enhance the efficiency and capacity of flotation mineralization reaction, and then discharge from the turbulent mineralization reactor outlet F and feed the jet split through the pipeline. ⁇ G;
  • the slurry is fed into the jet splitter 8 through the jet splitter inlet G, and is fed into the circulation generator 12 through the jet splitter 8 from multiple pipes, and the slurry is sprayed out from the circulation jet cavity 27 of the circulation generator 12 A circulating flow is formed between the barrel wall 25 and the ring plate 26 to further strengthen the flotation recovery effect of difficult-to-float particles.
  • the underflow product separated by the centrifugal flotation separator 13 is discharged as the final tailings from the tailings outlet K of the circulating flotation separator ,
  • the separated medium ore is discharged from the medium ore outlet J and fed into the feed port A of the forced mixing conditioner through the pipeline, and the discharged tailings slurry is fed into the feed port M of the centrifugal flotation separator through the pipeline.
  • the froth tank of the circulating flow flotation separator at the top of the separator 10 collects the overflowing foam and discharges it as a concentrate product from the outlet I of the foam tank of the circulating flotation separator;
  • Tailings slurry is fed into the centrifugal flotation separator 13 from the feed port M of the centrifugal flotation separator, enters the upper guide tube 32, and pushes the propelling wheel 30 into the space between the mineralization cover plate 33 and the discharge bottom plate 35
  • the centrifugal mineralization wheel 34 in the space rotates under the drive of the agitating transmission mechanism 16 through the transmission shaft, so that the tailings slurry will follow the rectangular slurry dispersion plate 31 and the guide inverted cone 28 under the action of the centrifugal mineralization wheel 34
  • the rising buoyancy is continuously generated in the tailings slurry, and a foam layer is formed on the top of the rising tailings slurry, which is finally discharged from the foam outlet L of the centrifugal flotation separator of the foam tank of the centrifugal flotation separator, and is fed into the circulating float through the pipeline.
  • the feeder feed port H of the separator repeats the sorting.
  • the tailings slurry attached to the discharge bottom plate 35 of the centrifugal flotation separator 13 is a difficult-to-select particles, and flows out through the discharge hole on the discharge bottom plate 35, and some are difficult to be selected.
  • the particles are discharged from the tailings outlet N of the centrifugal flotation separator of the gas dispersion box 17, and another part of the difficult-to-select particles is sucked into the centrifuge through the lower guide tube 29 in the middle of the discharge bottom plate 35 under the action of the centrifugal suction force of the centrifugal mineralization wheel 34 In the space of the mineralization wheel 35, the centrifugal force generated by the rotation of the centrifugal mineralization wheel 19 continues to generate buoyancy for the tailings slurry, and the refractory particles are dispersed in the slurry for continuous circulation.

Abstract

La présente invention concerne un système et un procédé de séparation de mélange utilisant une amélioration de fluide, applicables à la séparation de minéraux. Le système comprend un système de conditionnement de mélange forcé (1), un système de minéralisation de turbulence (2), un système de séparation par flottation à cyclone (3), et un système de séparation par flottation centrifuge (4). Une sortie de fines de minerai en circulation (C) du système de conditionnement de mélange forcé (1) est raccordée à une entrée de réservoir de distribution de conditionnement de mélange forcé (D) au moyen d'une pompe de circulation (6) et d'une conduite, et est également raccordée au système de minéralisation de turbulence (2) au moyen d'une conduite. Le système de minéralisation de turbulence (2) est raccordé au système de séparation par flottation à cyclone (3) au moyen d'une conduite. Le fond du système de séparation par flottation à cyclone (3) est raccordé à un conditionneur de mélange forcé (5) au moyen d'une conduite. Le système de séparation par flottation à cyclone (3) est raccordé au système de séparation par flottation centrifuge (4) au moyen d'une conduite. Le système de séparation par flottation centrifuge (4) est raccordé au système de séparation par flottation à cyclone (3) au moyen d'une conduite. La présente invention présente des étapes simples et est efficace. La structure d'un appareil de séparation de mélange et un procédé d'écoulement de fluide pour la séparation de mélange sont conçus raisonnablement, et la circulation des fines de minerai locale et la circulation des fines de minerai du système sont également conçues raisonnablement, ce qui permet d'améliorer l'efficacité et la performance de séparation de mélange de particules minérales ayant une mauvaise flottation.
PCT/CN2019/109885 2019-04-29 2019-10-08 Système et procédé de séparation de mélange utilisant une amélioration de fluide WO2020220586A1 (fr)

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