CN108686838B - Nanometer bubble generator - Google Patents
Nanometer bubble generator Download PDFInfo
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- CN108686838B CN108686838B CN201810469282.8A CN201810469282A CN108686838B CN 108686838 B CN108686838 B CN 108686838B CN 201810469282 A CN201810469282 A CN 201810469282A CN 108686838 B CN108686838 B CN 108686838B
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- copper foil
- micro
- air
- airflow channel
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- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a nano bubble generator, which comprises a shell, a horizontal clapboard, a filter plate and a micro-flow tube, wherein the micro-flow tube comprises an inner tube, an outer tube and a copper foil roll arranged between the inner tube and the outer tube, and the copper foil roll is made of copper foil with a micro airflow channel etched on the surface; the nanometer foam generator also comprises an air pump for injecting air into the air cavity and a water pump for injecting water into the air-liquid mixing cavity. The invention relates to a nano bubble generator, which utilizes copper foil etched with a large number of micro airflow channels to curl to form a micro flow pipe, high-pressure gas passes through the micro flow pipe to form a large number of micro airflows, and the micro airflows are cut by a blade rotating at high speed, so that a large number of nano bubbles are formed in a gas-liquid mixed liquid cavity. The size of the nano-bubbles generated by the nano-bubble generator can be controlled by controlling the diameter of the micro airflow channel and the rotating speed of the motor, the generated nano-bubbles are stable in size and large in bubble quantity, and the flotation efficiency and the mineral recovery rate can be improved.
Description
Technical Field
The invention relates to the technical field of mineral flotation, in particular to a device for performing flotation by adopting nano bubbles.
Background
Froth flotation processes are often used to sort fine particle minerals and have better efficiency and lower cost than table concentrator processes, high gradient magnetic separation and oil agglomeration. The main principle of the flotation method is based on the difference of surface chemical properties of minerals and slag, and the minerals and impurities are separated by utilizing the natural hydrophobicity of the surfaces of mineral particles and the hydrophilicity of the slag.
With the continuous development and consumption of mineral resources on earth by human beings, ore resources rich in ores and easy to process are gradually reduced, and the demand of metal materials is increased, so that poor, fine and miscellaneous ores have to be mined and sorted. Such ores must be ground very finely to allow sufficient monomer dissociation of the useful minerals, which in some cases means that the material needs to be ground to a particle size of less than 10 μm. However, as the ore size decreases, the flotation behavior of the mineral particles changes radically, and conventional flotation processes have difficulty in adequately recovering these useful fine fraction minerals due to the large size of the froth produced.
Disclosure of Invention
In view of the above, the present invention aims to provide a nanobubble generator to solve the problem that the existing foam generator can not fully recover fine-grained minerals due to the large particle size of the foam.
The invention relates to a nano-bubble generator, which comprises a shell with an opening at the upper part, wherein a horizontal clapboard is arranged in the middle of the shell and divides the shell into an upper part and a lower part, the lower part is provided with an air cavity, the upper part is provided with a gas-liquid mixing cavity, the upper end of the shell is also provided with a filter plate, and the filter plate is used for preventing particles from falling into the gas-liquid mixing cavity;
the nano bubble generator also comprises a plurality of micro flow tubes which are uniformly arranged on the horizontal partition plate, each micro flow tube comprises an inner tube, an outer tube and a copper foil roll arranged between the inner tube and the outer tube, the copper foil roll is made of copper foil with a micro airflow channel etched on the surface, the diameter of the micro airflow channel is 10-30um, the air inlet end of the copper foil roll is positioned in the air cavity, and the air outlet end of the copper foil roll is positioned in the gas-liquid mixing cavity; waterproof bearings are fixedly arranged at two ends of the inner pipe, a rotating shaft is arranged in each waterproof bearing, a blade for shearing airflow discharged by the copper foil coil is arranged at the upper end of each rotating shaft, and a motor for driving the rotating shaft is arranged in the air cavity;
the nano bubble generator also comprises an air pump for injecting air into the air cavity and a water pump for injecting water into the gas-liquid mixing cavity;
the nanometer bubble generator further comprises a water tank, a water inlet pipe and a water outlet pipe which are arranged on the water tank, a foam stabilizer adding port arranged at the lower part of the water tank, and a stirrer which is arranged on the water tank and used for uniformly mixing the foam stabilizer and water, wherein the water inlet of the water pump is connected with the water outlet pipe arranged on the water tank.
Further, the copper foil roll is manufactured by the following method:
1) selecting a copper foil with the roughness of both the front surface and the back surface below Ra0.025, covering a protective film on the back surface of the copper foil in a vacuum film covering mode, then placing the copper foil on a spin coating machine, adding photoresist on the front surface of the copper foil, and uniformly spinning the photoresist on the front surface of the copper foil by using the spin coating machine;
2) drying the copper foil to enable the solvent in the photoresist to escape;
3) prefabricating a micro airflow channel graph on a photomask plate, placing a copper foil and the photomask plate on a projection type photoetching machine, carrying out projection type exposure on the copper foil, and transferring the micro airflow channel graph on the photomask plate to the front surface of the copper foil;
4) placing the exposed copper foil into a developing solution, and dissolving the exposed photoresist on the copper foil into the developing solution, so that a micro airflow channel graph is exposed on the copper foil;
5) placing the circuit board into a ferric trichloride etching solution, and etching the copper foil so as to manufacture a micro airflow channel on the front surface of the copper foil;
6) placing the etched copper foil into a sodium hydroxide ethanol solution to remove the photoresist on the copper foil;
7) removing the protective film on the back of the copper foil;
8) and (4) manufacturing the copper foil with the protective film removed on a winding machine into a copper foil roll.
The invention has the beneficial effects that:
the invention relates to a nano bubble generator, which utilizes copper foil etched with a large number of micro airflow channels to curl to form a micro flow pipe, high-pressure gas passes through the micro flow pipe to form a large number of micro airflows, and the micro airflows are cut by a blade rotating at high speed, so that a large number of nano bubbles are formed in a gas-liquid mixed liquid cavity. The size of the nano-bubbles generated by the nano-bubble generator can be controlled by controlling the diameter of the micro airflow channel and the rotating speed of the motor, the generated nano-bubbles are stable in size and large in bubble quantity, and the flotation efficiency and the mineral recovery rate can be improved.
Drawings
FIG. 1 is a schematic structural view of a nanobubble generator of the present invention;
fig. 2 is an enlarged schematic view of the portion P in fig. 1.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in the figure, this embodiment nanometer bubble generator, including upper portion open-ended casing 1, the middle part of casing is provided with horizontal partition plate 2, horizontal partition plate separates into upper and lower two parts with the casing, and the lower part is air cavity 3, and the upper portion is gas-liquid mixing chamber 4, the upper end of casing still is provided with filter 5, the filter is used for preventing the particulate matter from falling into gas-liquid mixing chamber.
The nano bubble generator also comprises a plurality of micro flow tubes 6 uniformly arranged on the horizontal partition plate, wherein each micro flow tube comprises an inner tube 61, an outer tube 62 and a copper foil roll 63 arranged between the inner tube and the outer tube, the copper foil roll is made of copper foil with a micro airflow channel etched on the surface, the diameter of the micro airflow channel is 10-30um, the air inlet end of the copper foil roll is positioned in the air cavity, and the air outlet end of the copper foil roll is positioned in the air-liquid mixing cavity; waterproof bearings 7 are fixedly arranged at two ends of the inner pipe, a rotating shaft 8 is arranged in each waterproof bearing, a blade 9 for shearing the air flow discharged by the copper foil coil is arranged at the upper end of each rotating shaft, and a motor 10 for driving the rotating shaft is arranged in the air cavity. In the embodiment, the motor is a high-speed motor with the rotating speed exceeding 10000 r/min.
The nano-bubble generator also comprises an air pump 11 for injecting air into the air cavity and a water pump 12 for injecting water into the air-liquid mixing cavity.
The nano bubble generator further comprises a water tank 13, a water inlet pipe 14 and a water outlet pipe 15 which are arranged on the water tank, a foam stabilizer adding port 16 which is arranged at the lower part of the water tank, and a stirrer 17 which is arranged on the water tank and used for uniformly mixing the foam stabilizer and water, wherein the water inlet of the water pump is connected with the water outlet pipe arranged on the water tank.
In this embodiment, the copper foil roll is manufactured by the following method:
1) selecting a copper foil with the roughness of both the front surface and the back surface below Ra0.025, covering a protective film on the back surface of the copper foil in a vacuum film covering mode, then placing the copper foil on a spin coating machine, adding photoresist on the front surface of the copper foil, and uniformly spinning the photoresist on the front surface of the copper foil by using the spin coating machine; the high-finish surface can ensure that the front surface and the back surface of the copper foil can be tightly attached during subsequent winding, thereby forming a micro airflow channel which is not communicated with each other.
2) And drying the copper foil to enable the solvent in the photoresist to escape.
3) Prefabricating the micro airflow channel graph on a photomask plate, placing a copper foil and the photomask plate on a projection type photoetching machine, carrying out projection type exposure on the copper foil, and transferring the micro airflow channel graph on the photomask plate to the front surface of the copper foil.
4) And placing the exposed copper foil into a developing solution, and dissolving the exposed photoresist on the copper foil into the developing solution, so that the micro airflow channel graph is exposed on the copper foil.
5) And (3) placing the circuit board into ferric trichloride etching liquid to etch the copper foil, so that a micro airflow channel is formed on the front surface of the copper foil.
6) And putting the etched copper foil into a sodium hydroxide ethanol solution to remove the photoresist on the copper foil.
7) And removing the protective film on the back surface of the copper foil.
8) And (4) manufacturing the copper foil with the protective film removed on a winding machine into a copper foil roll.
The copper foil roll manufactured by the method adopts projection exposure to transfer the micro airflow channel on the photomask plate to the copper foil, the width of the micro airflow channel can reach the nanometer level, meanwhile, the depth of the micro airflow channel can be controlled by controlling the etching time, and the size control precision of the micro airflow channel is high.
The nano-bubble generator of the embodiment utilizes the copper foil etched with a large number of micro airflow channels to be curled to form the micro-flow tube, high-pressure gas passes through the micro-flow tube to form a large number of micro airflows, and the micro airflows are cut by the blade rotating at a high speed, so that a large number of nano-bubbles are formed in the gas-liquid mixing liquid cavity, the flotation requirement on micro minerals can be met, the flotation efficiency is improved, and the mineral recovery rate is high.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (2)
1. A nanobubble generator characterized by: the filter plate is used for preventing particles from falling into the gas-liquid mixing cavity;
the nano bubble generator also comprises a plurality of micro flow tubes which are uniformly arranged on the horizontal partition plate, each micro flow tube comprises an inner tube, an outer tube and a copper foil roll arranged between the inner tube and the outer tube, the copper foil roll is made of copper foil with a micro airflow channel etched on the surface, the diameter of the micro airflow channel is 10-30um, the air inlet end of the copper foil roll is positioned in the air cavity, and the air outlet end of the copper foil roll is positioned in the gas-liquid mixing cavity; waterproof bearings are fixedly arranged at two ends of the inner pipe, a rotating shaft is arranged in each waterproof bearing, a blade for shearing airflow discharged by the copper foil coil is arranged at the upper end of each rotating shaft, and a motor for driving the rotating shaft is arranged in the air cavity;
the nano bubble generator also comprises an air pump for injecting air into the air cavity and a water pump for injecting water into the gas-liquid mixing cavity;
the nanometer bubble generator further comprises a water tank, a water inlet pipe and a water outlet pipe which are arranged on the water tank, a foam stabilizer adding port arranged at the lower part of the water tank, and a stirrer which is arranged on the water tank and used for uniformly mixing the foam stabilizer and water, wherein the water inlet of the water pump is connected with the water outlet pipe arranged on the water tank.
2. The nanobubble generator of claim 1, wherein: the copper foil roll is manufactured by the following method:
1) selecting a copper foil with the roughness of both the front surface and the back surface below Ra0.025, covering a protective film on the back surface of the copper foil in a vacuum film covering mode, then placing the copper foil on a spin coating machine, adding photoresist on the front surface of the copper foil, and uniformly spinning the photoresist on the front surface of the copper foil by using the spin coating machine;
2) drying the copper foil to enable the solvent in the photoresist to escape;
3) prefabricating a micro airflow channel graph on a photomask plate, placing a copper foil and the photomask plate on a projection type photoetching machine, carrying out projection type exposure on the copper foil, and transferring the micro airflow channel graph on the photomask plate to the front surface of the copper foil;
4) placing the exposed copper foil into a developing solution, and dissolving the exposed photoresist on the copper foil into the developing solution, so that a micro airflow channel graph is exposed on the copper foil;
5) placing the circuit board into a ferric trichloride etching solution, and etching the copper foil so as to manufacture a micro airflow channel on the front surface of the copper foil;
6) placing the etched copper foil into a sodium hydroxide ethanol solution to remove the photoresist on the copper foil;
7) removing the protective film on the back of the copper foil;
8) and (4) manufacturing the copper foil with the protective film removed on a winding machine into a copper foil roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810469282.8A CN108686838B (en) | 2018-05-16 | 2018-05-16 | Nanometer bubble generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810469282.8A CN108686838B (en) | 2018-05-16 | 2018-05-16 | Nanometer bubble generator |
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| Publication Number | Publication Date |
|---|---|
| CN108686838A CN108686838A (en) | 2018-10-23 |
| CN108686838B true CN108686838B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810469282.8A Expired - Fee Related CN108686838B (en) | 2018-05-16 | 2018-05-16 | Nanometer bubble generator |
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| CN112170472A (en) * | 2019-07-02 | 2021-01-05 | 西南科技大学 | Novel emergency remediation technology for heavy metal contaminated soil |
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| CN2630837Y (en) * | 2003-08-12 | 2004-08-04 | 上海交通大学 | Apparatus for forming nano air bubble o nmica surface based on alcohol-water substitution |
| JP2007308544A (en) * | 2006-05-17 | 2007-11-29 | Hitachi Ltd | Nano composite material having low dielectric constant and low refractive index |
| CN102010038B (en) * | 2010-12-30 | 2012-07-04 | 波鹰(厦门)科技有限公司 | Nano catalytic electrolysis flocculation device |
| KR101401531B1 (en) * | 2012-04-05 | 2014-06-03 | 충남대학교산학협력단 | Production appararatus of gas-phase hollow nanoparticle using non-metallic template particle and method thereof |
| CN202519115U (en) * | 2012-04-19 | 2012-11-07 | 波鹰(厦门)科技有限公司 | Nano-catalysis, electrolysis, flocculation and air-floatation device |
| CN102626560B (en) * | 2012-04-24 | 2014-09-24 | 中国科学院力学研究所 | Rotational flow air flotation oil-water separation device and air flotation generator |
| CN205838609U (en) * | 2016-06-08 | 2016-12-28 | 岳阳长岭设备研究所有限公司 | A kind of modified model air floatation machine |
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Granted publication date: 20200110 Termination date: 20200516 |