AU2023100008A4 - Strong turbulent flow generating device for fastflotation ofmicro-fine particles - Google Patents
Strong turbulent flow generating device for fastflotation ofmicro-fine particles Download PDFInfo
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- AU2023100008A4 AU2023100008A4 AU2023100008A AU2023100008A AU2023100008A4 AU 2023100008 A4 AU2023100008 A4 AU 2023100008A4 AU 2023100008 A AU2023100008 A AU 2023100008A AU 2023100008 A AU2023100008 A AU 2023100008A AU 2023100008 A4 AU2023100008 A4 AU 2023100008A4
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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
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The present invention discloses a strong turbulent flow generating device for fast flotation of
micro-fine particles. The strong turbulent flow generating device for fast flotation of micro
fine particles includes a cylindrical pipe flow section and a plurality of conical rings disposed
in the pipe flow section. All of the conical rings are uniformly distributed along the axial
direction of the pipe flow section. An installing direction of the conical rings in the pipe flow
section is set to enable ore pulp to flow from a bottom surface to a top surface. A bottom surface
outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section.
A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical
ring is 0.3 to 0.8. An included angle between an outer side wall of the conical ring to an inner
wall of the pipe flow section is 15 to 45°. A plurality of water through holes are uniformly
formed in an outer side wall of the conical ring. The present invention can improve turbulent
flow intensity, reduce a floatation particle size lower limit, and improve recovery of micro-fine
particles without additionally increasing energy consumption.
1/3
DRAWINGS
3
FIG. 1
FIG. 2
Description
1/3 DRAWINGS
3
FIG. 1
FIG. 2
[0001] The present invention relates to a pipe flow device, particularly relates to a strong turbulent flow generating device for fast flotation of micro-fine particles, and belongs to the technical field of preparation equipment.
[0002] The generation of micro-fine particle ores is mainly caused by the need of fine grinding due to the too small dissemination size ofuseful ores or excessive grinding of coarse-particle ores. Due to the decreasing of the ore particle size, the decreasing of the mass of ore particles, and the increasing of the specific surface area. In conventional floatation, the collision probability of ore particles decreases, the specificity of reagents is poor, and mechanical inclusions and the like are caused. These factors finally result in the decrease of the concentrate grade and the recovery rate. At the same time, due to the particle size reduction, the interference of the surface electrical property of the fine particles on the floatation behavior of the fine particles is represented by slime coatings and entrainment. Additionally, when the particle size is reduced, the oxidation degree is increased, and the mutual activation effect among the ores is more obvious, so that the floatation process of micro-fine particles is much more difficult than that of coarse particles.
[0003] Therefore, the sorting recovery of the micro-fine particle ores are not only an effective path for developing lean ores and tailings and improving the utilization rate of ore resources, but also the key to realizing sustainable development of energy resources. Floatation technology is one of main measures of ore recovery, but the mass of micro-fine particles is very small which will make the ore particles be difficult to break through flow lines to collide with bubbles. Even if the collision occurs, they are lack of sufficient kinetic energy to break through energy barriers on the surfaces of the bubbles to attachment, so that application of the floatation technology to the recovery of the micro-fine particles is limited.
[0004] In the prior art, the flotation problem of the micro-fine particles is mainly solved by increasing the turbulent intensity of fluid in floatation devices. This is because by improving the turbulent flow intensity, on one hand, the fluctuating velocity and the kinetic energy of the particles can be improved, and the collision frequency and the adhesion probability of the particles with the bubbles can be increased; and on the other hand, the bubbles can be split smaller under the strong shear force in the turbulent flow, the concentration of the bubbles in the ore pulp is increased, the collision frequency of the particles with the bubbles is increased, and the recovery rate of the micro-fine particles is further improved. In addition, the turbulent flow can also improve the adsorption of floatation reagents on the surfaces of the particles, and the consumption of the reagents can be reduced. Generally, a method for improving the turbulent flow intensity in the floatation device is to increase external energy input, such as modes of accelerating an impeller rotating speed in a floatation cell and the like. However, this mode increases more energy consumption and the operation cost while strengthening the recovery of the micro-fine particles.
Technical Problem
[0005] In order to overcome various defects in the prior art, the present invention provides a strong turbulent flow generating device for fast flotation of micro-fine particles. The strong turbulent flow generating device for fast flotation of micro-fine particles can improve turbulent flow intensity, reduce the lower limit of flotation particle size, and improve a recovery of micro-fine particles without additionally
increasing energy consumption.
Technical Solution
[0006] In order to achieve the above objective of the present invention, a strong turbulent flow generating device for fast flotation of micro-fine particles of the present invention includes a cylindrical pipe flow section and a plurality of conical rings disposed in the pipe flow section. All of the conical rings are uniformly distributed along axial direction of the pipe flow section. An installing direction of the conical rings in the pipe flow section is set to enable ore pulp to flow from a bottom surface to a top
surface. A bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section. A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is 0.3 to 0.8. An included angle between an outer side wall of the conical ring to an inner wall of the pipe flow section is 150 to 45°. A plurality of water through holes are uniformly formed in an outer side wall of the conical ring.
[0007] Further, the water through holes are isosceles triangular.
[0008] Further, 3 to 6 water through holes are formed in the outer side wall of the conical ring.
[0009] Preferably, an interval between every two conical rings in the pipe flow section is 15 mm to 25 mm.
[0010] Preferably, a bottom surface edge of the conical ring and the inner wall of the pipe flow section are fixedly connected in a gapless manner.
[0011] The action principle of the conical rings disposed in the present invention is as follows: when ore pulp flows through the conical rings with holes, the flowing direction of the ore pulp is from the bottom surfaces to the top surfaces of the conical rings, so that great flow rate acceleration of the ore pulp is caused by pipeline shrinkage, and a jet flow with an ultrahigh turbulent flow intensity is formed. A turbulent flow dissipation rate of fluid in the strong turbulent flow is greatly increased. More kinetic energy of the fluid can be transmitted to particles. The particle kinetic energy improvement can help the particles get rid of liquid flow lines and improve the collision efficiency with bubbles on one hand, and is favorable for breakthrough of energy barriers on the surfaces of bubbles by the particles so as to increase the attachment efficiency of the particles with the bubbles on the other hand, and the improvement of the floatation rate and the recovery of the micro-fine particles is finally realized. In a position near the pipe wall behind the conical rings, a negative pressure region can be generated by the jet flow effect. Bubbles are easy to gather in the negative pressure region, so that the quantity of the bubbles capable of interacting with the particles is reduced in a pipe, and the condition is unfavorable for the improvement of the floatation rate and the recovery. In order to avoid the problem, water through holes are uniformly formed in the conical rings, so that a small part of ore pulp can flow out through the
isosceles triangular water through holes formed in the conical rings. The triangular water through holes give an acceleration effect to the ore pulp, and the negative pressure region formed by the jet flow can be effectively damaged to prevent the bubbles from gathering in the negative pressure region.
Advantageous Effect
[0012] The present invention improves the turbulent flow intensity in a mode of changing a flow passage, and can reduce energy penalty while realizing the improvement of the recovery of micro-fine particle ores. Additionally, the structure is simple, the size is small, the installation is convenient, the cost is low, and the continuous and stable operation of the device can be realized.
[0013] Fig. 1 is a schematic diagram of a main body structure of an embodiment of the present invention.
[0014] Fig. 2 is a front view of a conical ring.
[0015] Fig. 3 is a top view of the conical ring.
[0016] Fig. 4 is a schematic diagram of a main body structure of another embodiment of the present invention.
[0017] Fig. 5 is a curve graph of a floatation recovery rate of micro-fine particle talc over time under different pipe flow structures.
[0018] In the figures, 1 denotes a pipeline, 2 denotes a conical ring, and 3 denotes a water through hole.
[0019] The present invention will be illustrated in detail in conjunction with drawings and specific embodiments.
[0020] Embodiment 1
[0021] A strong turbulent flow generating device for fast flotation of micro-fine particles includes a cylindrical pipe flow section 1 and a plurality of conical rings 2 disposed in the pipe flow section. All of the conical rings 2 are uniformly distributed in an axial direction of the pipe flow section. An interval between every two conical rings 2 is 15 mm. An installing direction of the conical rings 2 in the pipe flow section 1 is set to enable ore pulp to flow from a bottom surface to a top surface. A bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section 1. A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is 0.4. An included angle between an outer side wall of each of the conical rings to an inner wall of the pipe flow section is 25. In order to avoid energy loss, a bottom surface edge of each of the conical rings 2 and the inner wall of the pipe flow section 1 are fixedly connected in a gapless manner. 3 isosceles triangular water through holes are uniformly formed in an outer side wall of each of the conical rings.
[0022] Embodiment 2
[0023] As shown in Fig. 1 to Fig. 3, a strong turbulent flow generating device for fast flotation of micro-fine particles includes a cylindrical pipe flow section 1 and a plurality of conical rings 2 disposed in the pipe flow section. All of the conical rings 2 are uniformly distributed in an axial direction of the pipe flow section. An interval between every two conical rings 2 is 20 mm. An installing direction of the conical rings 2 in the pipe flow section 1 is set to enable ore pulp to flow from a bottom surface to a top surface. A bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section 1. A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is 0.6. An included angle between an outer side wall of each of the conical rings to an inner wall of the pipe flow section is 30°. In order to avoid energy loss, a bottom surface edge of each of the conical rings 2 and the inner wall of the pipe flow section 1 are fixedly connected in a gapless manner. isosceles triangular water through holes are uniformly formed in an outer side wall of each of the conical rings.
[0024] Embodiment 3
[0025] A strong turbulent flow generating device for fast flotation of micro-fine particles includes a cylindrical pipe flow section 1 and a plurality of conical rings 2
disposed in the pipe flow section. All of the conical rings 2 are uniformly distributed in an axial direction of the pipe flow section. An interval between every two conical rings 2 is 25 mm. An installing direction of the conical rings 2 in the pipe flow section 1 is set to enable ore pulp to flow from a bottom surface to a top surface. A bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section 1. A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is 0.6. An included angle between an outer side wall of each of the conical rings to an inner wall of the pipe flow section is 45°. In order to avoid energy loss, a bottom surface edge of each of the conical rings 2 and the inner wall of the pipe flow section 1 are fixedly connected in a gapless manner. 6 isosceles triangular water through holes are uniformly formed in an outer side wall of each of the conical rings.
[0026] Embodiment 4
[0027] As shown in Fig. 4, a strong turbulent flow generating device for fast flotation of micro-fine particles includes a cylindrical pipe flow section 1 and a plurality of conical rings 2 disposed in the pipe flow section. All of the conical rings 2 are uniformly distributed in an axial direction of the pipe flow section. An interval between every two conical rings 2 is 20 mm. An installing mode of the conical rings 2 in the pipe flow section 1 is set to enable ore pulp to flow from a bottom surface to a top surface. A bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section 1. A ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is sequentially increased in a flowing direction of the ore pulp, and is respectively set to be 0.3, 0.4 and 0.5 in the present embodiment. An included angle between an outer side wall of each of the conical rings to an inner wall of the pipe section is sequentially reduced, and is respectively set to be 25, 20 and 15° in the present embodiment. In order to avoid energy loss, a bottom surface edge of each of the conical rings 2 and the inner wall of the pipe flow section 1 are fixedly connected in a gapless manner. 4 isosceles triangular water through holes are uniformly formed in an outer side wall of each of the conical rings.
[0028] When the ore pulp flows through the conical rings 2 in the pipe flow section 1, great flow rate acceleration of the ore pulp is caused by flowing area shrinkage, and a strong turbulent flow environment is formed, so that the collision frequency between bubbles and particles is increased, and greater kinetic energy is given to the particles to
realize mineralization. Uniformly forming 3 to 6 water through holes in the side wall of each of the conical rings 2 is to enable a small amount of ore pulp to flow out from the water through holes, to damage a negative pressure region generated by jet flow, and to prevent gathering of bubbles in the negative pressure region. The high-intensity turbulent flow region formed by jet flow can be gradually attenuated along with flowing, so that in the use process, the plurality of conical rings 2 with holes can be formed in the pipe flow section 1 in the flowing direction so as to generate a plurality of high turbulent flow regions, and the effect of strengthening the floatation is achieved. At the same time, too strong turbulent flow may cause detachment of partial ore particles after being attach to the surfaces of the bubbles, so that the recovery and the floatation rate are reduced. Therefore, during arrangement of the plurality of conical rings with the holes, the ratio of the top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring 2 can be sequentially increased in the flowing direction, the included angle between the outer side wall of the conical ring and the inner wall of the pipe section is sequentially reduced, so that the turbulent flow intensity inside the pipe flow section 1 shows distribution characteristics from high numerical values to low numerical values along the flowing direction, particles detached at the high turbulent flow intensity region are attached again in a low-turbulent-flow-intensity region, and the objective of rapidly recovering ores with different sizes in one step is achieved.
[0029] So as to further prove the floatation performance of the technical solution of the present invention, floatation experiments using a structure in Embodiment 4 and a plain pipe flow section were performed and compared.
[0030] The experimental details are as follows:
[0031] Used ores were fine-particle talc ores with the particle size distribution in range of 0-74 pm. A floatation experiment system was a closed-loop circulation system consisting of a preconditioning device, a circulation pump, a micro bubble generating device, a turbulent flow mineralization device and a foam separation device. A comparison experiment system was characterized in that a strong turbulent flow pipe with built-in conical rings with holes in the turbulent flow mineralization device was replaced with an ordinary plain pipe.
[0032] 15 g of talc ores were added into 1.5 L of deionized water, and were uniformly dispersed through being stirred in a stirring barrel. After 2 min, 50 ppm of a methyl isobutyl carbinol foaming agent was added into the stirring barrel so as to generate micro bubbles. After 3 min of preconditioning, the circulation pump was started. The circulation flow rate was regulated to a desired flow rate. After the operation was stable, a gas valve was opened. Through this experiment, the talc recovery rate at different time periods under the conditions of average flow rate of 1 m/s in the strong turbulent flow pipe and air flow rate quantity of 1 L/min was tested.
[0033] The experiment result is as shown in Fig. 5. It can be seen that the strong turbulent flow pipe had a higher floatation rate, and at 60 s after the beginning of the floatation, the recovery of the strong turbulent flow pipe was improved by 7% through being compared with that of the ordinary plain pipe.
[0034] Therefore, it proves that a strong turbulent flow generating pipe with the built in conical rings can generate the high-intensity turbulent flow without improving energy input, and the cost can be reduced while the floatation rate and the recovery rate of the micro-fine particle ores are improved.
Claims (5)
1. A strong turbulent flow generating device for fast flotation of micro-fine particles, comprising a cylindrical pipe flow section and a plurality of conical rings disposed in the pipe flow section, wherein all of the conical rings are uniformly distributed in an axial direction of the pipe flow section, and an installing direction of the conical rings in the pipe flow section is set to enable ore pulp to flow from a bottom surface to a top surface; a bottom surface outer diameter Di of the conical ring is the same as an inner diameter of the pipe flow section, a ratio of a top surface outer diameter D 2 to the bottom surface outer diameter Di of the conical ring is 0.3 to 0.8, and an included angle between an outer side wall of the conical ring to an inner wall of the pipe flow section is 15 to 45; and a
plurality of water through holes are uniformly formed in an outer side wall of the conical ring; wherein an interval between every two conical rings in the pipe flow section is 15 mm to 25 mm.
2. The strong turbulent flow generating device for fast flotation of micro-fine particles according to claim 1, wherein the water through holes (3) are isosceles triangular through holes.
3. The strong turbulent flow generating device for fast flotation of micro-fine particles according to claim 1 or claim 2, wherein 3 to 6 water through holes are formed in the outer side wall of the conical ring.
4. The strong turbulent flow generating device for fast flotation of micro-fine particles according to any one of claims 1 to 3, wherein a ratio of the top surface outer diameter D 2 to the bottom surface outer diameter Di of each of the conical rings disposed in the pipe flow section is sequentially increased in a flowing direction of the ore pulp, and an included angle between the outer side wall of each of the conical rings and the inner wall of the pipe flow section is sequentially reduced in the flowing direction of the ore pulp.
5. The strong turbulent flow generating device for fast flotation of micro-fine particles according to any one of claims 1 to 4, wherein a bottom surface edge of the conical ring
and the inner wall of the pipe flow section are fixedly connected in a gapless manner.
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| AU2023100008A AU2023100008A4 (en) | 2019-09-19 | 2023-01-31 | Strong turbulent flow generating device for fastflotation ofmicro-fine particles |
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| CN201910885929.XA CN110773329B (en) | 2019-09-19 | 2019-09-19 | Turbulent flow generating device suitable for micro-fine particle is selected separately fast |
| CN201910885929.X | 2019-09-19 | ||
| AU2020294295A AU2020294295B2 (en) | 2019-09-19 | 2020-07-01 | Strong turbulent flow generating device for fast flotation of micro-fine particles |
| PCT/CN2020/099653 WO2021051953A1 (en) | 2019-09-19 | 2020-07-01 | Strong turbulent flow generation device suitable for rapid sorting of micro-fine particles |
| AU2023100008A AU2023100008A4 (en) | 2019-09-19 | 2023-01-31 | Strong turbulent flow generating device for fastflotation ofmicro-fine particles |
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| CN110773329B (en) * | 2019-09-19 | 2020-09-01 | 中国矿业大学 | Turbulent flow generating device suitable for micro-fine particle is selected separately fast |
| CN112844861A (en) * | 2020-12-24 | 2021-05-28 | 中国矿业大学 | Superfine particle turbulent flow sorting system and sorting method |
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| SU1079301A1 (en) * | 1982-07-20 | 1984-03-15 | Украинский научно-исследовательский и проектно-конструкторский институт по обогащению и брикетированию углей "Укрнииуглеобогащение" | Flotation machine |
| US4861165A (en) * | 1986-08-20 | 1989-08-29 | Beloit Corporation | Method of and means for hydrodynamic mixing |
| AUPR536301A0 (en) * | 2001-05-31 | 2001-06-28 | Chuen, Foong Weng | Method of mixing a liquid/liquid and/or gaseous media into a solution |
| CN101306398A (en) * | 2007-05-15 | 2008-11-19 | 上海大屯能源股份有限公司 | Microbubble swirl separation method and divice |
| CN201546750U (en) * | 2009-10-23 | 2010-08-11 | 内蒙古满世煤炭集团罐子沟煤炭有限责任公司 | Foam generator for coal mine dust control |
| CA2898486C (en) * | 2010-05-20 | 2018-04-24 | William Matthew Martin | Method and device for in-line injection of flocculent agent into a fluid flow of mature fine tailings |
| KR20120063409A (en) * | 2010-12-07 | 2012-06-15 | 김성일 | Heating device for high frequency induction heating device |
| CN102205262B (en) * | 2011-05-17 | 2014-02-26 | 中国科学院过程工程研究所 | Liquid-solid interference fluidized bed separator as well as separating method and application thereof |
| US9605913B2 (en) * | 2011-05-25 | 2017-03-28 | Saudi Arabian Oil Company | Turbulence-inducing devices for tubular heat exchangers |
| CN102878856B (en) * | 2012-10-25 | 2014-04-16 | 北京化工大学 | Baffling and turbulence combined type enhanced heat transfer inner inserting element |
| CN103575089B (en) * | 2013-11-05 | 2015-07-15 | 中联重科股份有限公司 | Drying drum |
| CN104511374B (en) * | 2014-12-10 | 2019-02-19 | 中国矿业大学 | A kind of pipe stream section apparatus suitable for fine mineral mineralising |
| RU2611996C1 (en) * | 2015-09-14 | 2017-03-01 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кемеровский технологический институт пищевой промышленности (университет)" | Membrane apparatus |
| CN204929886U (en) * | 2015-09-25 | 2016-01-06 | 张中华 | Quantitative control system in a kind of modern agriculture water-saving irrigation |
| CN205495838U (en) * | 2016-04-06 | 2016-08-24 | 北京科技大学 | A rotatory efflux air agitation device for efflux formula flotation device |
| CN205868559U (en) * | 2016-07-26 | 2017-01-11 | 中国矿业大学 | Whirl static microbubble flotation column step strengthening pipe flows section mineralize mineralization device |
| CN207121456U (en) * | 2017-08-24 | 2018-03-20 | 天津市金通正水处理技术开发有限公司 | A kind of integrated reverse-osmosis water purification machine |
| CN110773329B (en) * | 2019-09-19 | 2020-09-01 | 中国矿业大学 | Turbulent flow generating device suitable for micro-fine particle is selected separately fast |
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| CN110773329B (en) | 2020-09-01 |
| AU2020294295B2 (en) | 2023-03-16 |
| WO2021051953A1 (en) | 2021-03-25 |
| AU2020294295A1 (en) | 2021-04-08 |
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