CN108339673B - Cavitation jet flow flotation bubble generator and flotation device - Google Patents
Cavitation jet flow flotation bubble generator and flotation device Download PDFInfo
- Publication number
- CN108339673B CN108339673B CN201810138566.9A CN201810138566A CN108339673B CN 108339673 B CN108339673 B CN 108339673B CN 201810138566 A CN201810138566 A CN 201810138566A CN 108339673 B CN108339673 B CN 108339673B
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- pipe
- flotation
- cavitation jet
- bubble generator
- diffusion
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- 238000005188 flotation Methods 0.000 title claims abstract description 86
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000009792 diffusion process Methods 0.000 claims description 29
- 239000012141 concentrate Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 10
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 12
- 239000011707 mineral Substances 0.000 abstract description 12
- 230000033558 biomineral tissue development Effects 0.000 abstract description 10
- 239000003245 coal Substances 0.000 abstract description 7
- 239000011859 microparticle Substances 0.000 abstract description 7
- 238000009291 froth flotation Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000010907 mechanical stirring Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
Abstract
The invention relates to the technical field of flotation devices, in particular to a cavitation jet flow flotation bubble generator and a flotation device, which solve the problems that the existing froth flotation mineral cannot effectively overcome low efficiency and poor selectivity of collision mineralization of fine coal and mineral. The invention realizes the non-collision mineralization floatation function of the micro-particle coal and mineral particles, so that the recovery rate and selectivity of the micro-particle floatation are synchronously improved.
Description
Technical Field
The invention relates to the technical field of flotation devices, in particular to a cavitation jet flotation bubble generator and a flotation device.
Background
The froth flotation is a general method for separating minerals from micro-fine particle ore pulp, a flotation machine utilizing the froth flotation is provided with a mechanical stirring flotation machine and a jet flotation machine, wherein the mechanical stirring flotation machine pulverizes bubbles by virtue of the cutting action of a stirring impeller to generate froth, the size of the froth is larger and is about 1-3 mm, the mineralization mode of particles and bubbles is mainly collision mineralization, the micro-fine particle collision mineralization efficiency is low, and the selectivity is poor; the jet flotation machine sucks air by utilizing the principle that pulp is sprayed to generate negative pressure, and foams are generated by inflating pulp to perform flotation separation, and because the negative pressure is generated when the pulp is sprayed by the flotation machine, dissolved gas in the pulp is separated out in a micro-bubble mode while the air is sucked, so that the micro-particle flotation process is strengthened, the jet flotation machine is widely applied to the field of micro-particle coal and mineral flotation, and is considered as a substitute technical device of a mechanical stirring type flotation machine, and the representative model of the jet flotation machine is a 'jet flotation machine' disclosed in Chinese patent 92229333.3, and the traditional mechanical stirring device is replaced by a jet stirring device of the flotation machine, so that the sorting effect of the micro-particle coal is improved.
The jet flotation machine has the advantages that the particle size of generated bubbles is smaller than that of a mechanical stirring flotation machine, the gas-liquid interface area for the contact of particle bubbles is increased under the condition of a certain aeration amount, and the collision mineralization probability of the particle bubbles is further increased to a certain extent, but for fine mineral particles, the mineral particles have small inertia, the collision mineralization efficiency is low, the mineral particles are easy to be carried in the foam to pollute the concentrate, and the grade of the flotation concentrate is reduced.
Therefore, the design of the novel flotation equipment which can effectively overcome the defects of low impact mineralization efficiency and poor selectivity of micro-fine particle coal and minerals while ensuring the conventional size fraction separation efficiency is a technical problem to be solved urgently in the field of industry.
Disclosure of Invention
The invention provides a cavitation jet flotation bubble generator and a flotation device, which aim to solve the problems that the existing froth flotation minerals can not effectively overcome the problems of low collision mineralization efficiency and poor selectivity of fine coal and minerals.
The invention is realized by the following technical scheme: the utility model provides a cavitation efflux flotation bubble generator, including pan feeding pipe, highly-compressed air intake pipe, the venturi, the diffusion pipe, venturi mixer and breathing pipe, the pan feeding pipe top is provided with the flange, the lateral wall of pan feeding pipe is provided with highly-compressed air intake pipe, the pan feeding pipe bottom is connected with the diffusion pipe, the middle part cavity of diffusion pipe is the wide gradual change structure in upper narrow down, diffusion pipe top threaded connection has the venturi, the diffusion pipe bottom is provided with the connecting pipe, the connecting pipe lower part is provided with venturi mixer, venturi mixer peg graft in the downcomer, venturi mixer is close to the lateral wall of diffusion pipe and is provided with the breathing pipe.
The diameter of the throat pipe is 1/2-1/3 of the diameter of the feeding pipe, the distance between the throat pipe and the upper end face of the high-pressure air inlet pipe is larger than the diameter of the feeding pipe, the distance between the lower end face of the diffusion pipe and the venturi mixer is 1-1.5 times of the diameter of the lower end face of the diffusion pipe, and the minimum diameter of the venturi mixer is 1.2-2 times of the diameter of the lower end face of the diffusion pipe.
The pressure of the gas applied in the high-pressure air inlet pipe is 300-400 kPa, and the flow rate of the gas is 2-3% of the flow rate of the ore pulp added into the feeding pipe.
The cavitation jet flow flotation device comprises a cavitation jet flow flotation bubble generator, a flotation tank and a concentrate overflow tank, wherein a downcomer is arranged at the lower part of the cavitation jet flow flotation bubble generator, the bottom of the downcomer is connected with an ore pulp distribution head, the ore pulp distribution head and the downcomer are arranged in the flotation tank, a tailing outlet is formed in the lower part of the flotation tank, a concentrate overflow tank is arranged at the outer side of the flotation tank, and a concentrate outlet is arranged in the concentrate overflow tank.
The aerated ore pulp passing through the cavitation jet flow flotation bubble generator is uniformly distributed on the section of the flotation tank by an ore pulp distribution head connected with a downcomer, mineralized bubbles carry concentrate into a concentrate overflow tank to enter the next process from a concentrate outflow port, and unmineralized particles enter the next process from a tailing discharge port at the bottom of the flotation tank along with the ore pulp flow.
Compared with the prior art, the invention has the following beneficial effects:
the cavitation jet flow flotation bubble generator and the flotation device can generate micro-nano air pockets on the surfaces of hydrophobic particles in situ and generate conventional flotation bubbles at the same time, realize the non-collision mineralization flotation function of the micro-particle coal and the mineral particles, and synchronously improve the recovery rate and the selectivity of the micro-particle flotation.
Drawings
FIG. 1 is a schematic diagram of a cavitation jet flotation bubble generator in the present invention;
fig. 2 is a schematic structural diagram of a cavitation jet flotation bubble generator and a flotation device according to the present invention.
In the figure: 1-cavitation jet flow flotation bubble generator, 2-downcomer, 3-ore pulp distribution head, 4-flotation tank, 5-concentrate overflow tank, 6-concentrate outlet, 7-tailing outlet, 8-feeding pipe, 9-throat pipe, 10-diffusion pipe, 11-high pressure air inlet pipe, 12-connecting pipe, 13-venturi mixer and 14-air suction pipe.
Detailed Description
The invention is further described with reference to fig. 1 and 2, and the cavitation jet flotation bubble generator comprises a feeding pipe 8, a high-pressure air inlet pipe 11, a throat pipe 9, a diffusion pipe 10, a venturi mixer 13 and an air suction pipe 14, wherein a flange is arranged at the top of the feeding pipe 8, the high-pressure air inlet pipe 11 is arranged on the side wall of the feeding pipe 8, the diffusion pipe 10 is connected to the bottom of the feeding pipe 8, the middle cavity of the diffusion pipe 10 is of a gradual change structure with the upper part narrow and the lower part wide, the throat pipe 9 is connected to the top of the diffusion pipe 10 in a threaded mode, a connecting pipe 12 is arranged at the bottom of the diffusion pipe 10, the venturi mixer 13 is arranged at the lower part of the connecting pipe 12 and is inserted into the lower guide pipe 2, and the air suction pipe 14 is arranged on the side wall, close to the diffusion pipe 10, of the venturi mixer 13.
The diameter of the throat pipe 9 is 1/2-1/3 of the diameter of the feeding pipe 8, the distance between the throat pipe 9 and the upper end face of the high-pressure air inlet pipe 11 is larger than the diameter of the feeding pipe 8, the distance between the lower end face of the diffusion pipe 10 and the venturi mixer 13 is 1-1.5 times of the diameter of the lower end face of the diffusion pipe 10, and the minimum diameter of the venturi mixer 13 is 1.2-2 times of the diameter of the lower end face of the diffusion pipe 10. The pressure of the gas applied in the high-pressure air inlet pipe 11 is 300-400 kPa, and the flow rate of the gas is 2-3% of the flow rate of the ore pulp added into the feeding pipe 8.
The utility model provides a cavitation jet flotation device, includes cavitation jet flotation bubble generator 1, flotation tank 4 and concentrate overflow launder 5, and cavitation jet flotation bubble generator 1 lower part is provided with downcomer 2, and the downcomer 2 bottom is connected with ore pulp distribution head 3, and ore pulp distribution head 3 and downcomer 2 set up in flotation tank 4, and open in flotation tank 4 lower part has tailing discharge port 7, and the flotation tank 4 outside is provided with concentrate overflow launder 5, and concentrate overflow launder 5 is provided with concentrate outlet 6. The aerated ore pulp passing through the cavitation jet flow flotation bubble generator 1 is uniformly distributed on the section of the flotation tank 4 by the ore pulp distribution head 3 connected with the downcomer 2, mineralized bubbles carry concentrate into the concentrate collecting tank 5 and enter the next working procedure by the concentrate outlet 6, and unmineralized particles enter the next working procedure by the tailing outlet 7 at the bottom of the flotation tank 4 along with the ore pulp flow.
According to the cavitation jet flotation bubble generator and the flotation device, when the cavitation jet flotation bubble generator and the flotation device are operated, the top of the feeding pipe 8 is connected with a conveying pipeline through a flange, ore pulp with the pressure of 0.18-0.3 MPa enters the cavitation jet flotation bubble generator 1 from the upper feeding pipe 8, air is pressed in by the high-pressure air inlet pipe 11, the high-pressure air is mixed with the ore pulp, when the air flows through the throat 9, the gas in the ore pulp is greatly separated out in the form of micro-nano air pockets on the surface of hydrophobic particles due to the local sudden reduction of the static pressure at the throat 9, the ore pulp containing the micro-nano air pockets is sprayed out at a high speed through the diffusion pipe, negative pressure is formed at the joint of the ore pulp and the lower guide pipe 2, the air is self-absorbed into the lower guide pipe 2 through the air suction pipe and is torn into micro-bubbles due to the high-strength turbulence of the ore pulp, the hydrophobic particles attached with the micro-nano air pockets are collided and mineralized in the high-turbulence environment of the lower guide pipe 2, so that particle bubble air clusters are formed, and the pulp is uniformly distributed on the section of the flotation tank 4 through the ore pulp distribution head 3 at the lower part of the lower guide pipe 2; the particle bubble air floc floats in the flotation tank 4, a foam layer is formed at the upper part of the flotation tank 4, the particle bubble air floc further enters the concentrate overflow tank 5 through an overflow weir, finally enters the next working procedure through a concentrate outflow port 6, and unmineralized particles enter the next working procedure through a tailing discharge port 7 at the bottom of the flotation tank, so that the flotation process is completed.
Claims (5)
1. The cavitation jet flotation bubble generator is characterized in that: including pan feeding pipe (8), highly-compressed air intake pipe (11), choke (9), diffusion pipe (10), venturi mixer (13) and breathing pipe (14), pan feeding pipe (8) top is provided with the flange, the lateral wall of pan feeding pipe (8) is provided with highly-compressed air intake pipe (11), pan feeding pipe (8) bottom is connected with diffusion pipe (10), the middle part cavity of diffusion pipe (10) is the gradual change structure of upper narrow down wide, diffusion pipe (10) top threaded connection has choke (9), diffusion pipe (10) bottom is provided with connecting pipe (12), connecting pipe (12) lower part is provided with venturi mixer (13), venturi mixer (13) are pegged graft in downcomer (2), the lateral wall that venturi mixer (13) are close to diffusion pipe (10) is provided with breathing pipe (14).
2. A cavitation jet flotation bubble generator as claimed in claim 1 wherein: the diameter of the throat pipe (9) is 1/2-1/3 of the diameter of the feeding pipe (8), the distance between the throat pipe (9) and the upper end face of the high-pressure air inlet pipe (11) is larger than the diameter of the feeding pipe (8), the distance between the lower end face of the diffusion pipe (10) and the venturi mixer (13) is 1-1.5 times the diameter of the lower end face of the diffusion pipe (10), and the minimum diameter of the venturi mixer (13) is 1.2-2 times the diameter of the lower end face of the diffusion pipe (10).
3. A cavitation jet flotation bubble generator as claimed in claim 1 wherein: the pressure of the gas applied in the high-pressure air inlet pipe (11) is 300-400 kPa, and the flow rate of the gas is 2-3% of the flow rate of the ore pulp added into the feeding pipe (8).
4. A cavitation jet flotation device, characterized in that: the device comprises a cavitation jet flow flotation bubble generator (1), a flotation tank (4) and a concentrate overflow tank (5) which are arranged in any one of claims 1-3, wherein a lower guide pipe (2) is arranged at the lower part of the cavitation jet flow flotation bubble generator (1), the bottom of the lower guide pipe (2) is connected with a pulp distribution head (3), the pulp distribution head (3) and the lower guide pipe (2) are arranged in the flotation tank (4), a tailing outlet (7) is arranged at the lower part of the flotation tank (4), a concentrate overflow tank (5) is arranged at the outer side of the flotation tank (4), and a concentrate outlet (6) is arranged in the concentrate overflow tank (5).
5. A cavitation jet flotation device according to claim 4 wherein: the aerated ore pulp passing through the cavitation jet flow flotation bubble generator (1) is uniformly distributed on the section of the flotation tank (4) through an ore pulp distribution head (3) connected with the downcomer (2), mineralized bubbles carry concentrate into the concentrate overflow tank (5) to enter the next working procedure through a concentrate outlet (6), and unmineralized particles enter the next working procedure through a tailing outlet (7) at the bottom of the flotation tank (4) along with the ore pulp flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810138566.9A CN108339673B (en) | 2018-02-10 | 2018-02-10 | Cavitation jet flow flotation bubble generator and flotation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810138566.9A CN108339673B (en) | 2018-02-10 | 2018-02-10 | Cavitation jet flow flotation bubble generator and flotation device |
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| Publication Number | Publication Date |
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| CN108339673A CN108339673A (en) | 2018-07-31 |
| CN108339673B true CN108339673B (en) | 2023-11-21 |
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| CN201810138566.9A Active CN108339673B (en) | 2018-02-10 | 2018-02-10 | Cavitation jet flow flotation bubble generator and flotation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092092A (en) * | 2018-09-30 | 2018-12-28 | 深圳市享宝科技有限公司 | Micro-nano bubble generator |
| CN109821664A (en) * | 2019-03-22 | 2019-05-31 | 山东森科重工机械有限公司 | A kind of flotation cone recycling subparticle cleaned coal device |
| CN111663040A (en) * | 2020-06-22 | 2020-09-15 | 中南大学 | Method for enhancing oxygen oxidation iron removal in solution by using microbubble generator |
| CN113477412B (en) * | 2021-06-16 | 2023-10-20 | 基元科技(云南)有限公司 | High-efficiency energy-saving middling negative pressure circulation jet flow micro-bubble flotation column |
| CN113371787A (en) * | 2021-06-24 | 2021-09-10 | 浙江工业大学 | Gas-driven cavitation system and method |
| CN114210464A (en) * | 2021-10-26 | 2022-03-22 | 江苏大学 | Venturi tube cavitation strengthening device for mineral flotation |
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2018
- 2018-02-10 CN CN201810138566.9A patent/CN108339673B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1992003220A1 (en) * | 1990-08-27 | 1992-03-05 | The University Of Newcastle Research Associates Limited | Aeration apparatus with draft tube |
| WO1995027557A1 (en) * | 1994-04-12 | 1995-10-19 | Ekokehitys Oy | Method of generating gas bubbles in a liquid and apparatus for the implementation of the method |
| CN1310260A (en) * | 2000-02-03 | 2001-08-29 | 安德里茨有限公司 | Method and equipment for air inflation dispersion |
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| CN108339673A (en) | 2018-07-31 |
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Effective date of registration: 20210318 Address after: 017211 no.3002, North Xingyuan, xinkhan Road, a town, ejinholo banner, Ordos City, Inner Mongolia Autonomous Region Applicant after: Inner Mongolia Keling times Mining Technology Co.,Ltd. Address before: 030024 No. 79 West Main Street, Taiyuan, Shanxi, Yingze Applicant before: Taiyuan University of Technology |
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