Periodic eddy current disturbance device for flotation selectivity improvement

Abstract

The invention discloses a periodical vortex disturbance device for improving flotation selectivity, and relates to the technical field of micro-fine particle mineral flotation, the periodical vortex disturbance device comprises a jet generator arranged on a flotation column foam separation section, the jet generator comprises a pipe body with a closed end and an open end, the open end extends into the flotation column foam separation section in a sealed mode, and the closed end is connected with the pipe body. The pipe body is arranged in the flotation column foam separation section, so that the pipe body is communicated with an inner cavity of the flotation column foam separation section, the pipe body has an expansion state and a contraction state which can be mutually switched, and when the pipe body is switched from the expansion state to the contraction state, ore pulp in the pipe body enters the flotation column foam separation section in a jet flow state and forms a jet flow field in the flotation column foam separation section. The jet flow field can apply periodic vortex disturbance to a combination of rising fine non-target minerals and bubbles, and the intensity of the periodic jet flow field can be adjusted according to the properties of different hydrophobic fine mineral particles, so that adhesion between the non-target minerals and the bubbles is destroyed, separation of the non-target minerals and the bubbles is promoted, and the separation efficiency of the non-target minerals and the bubbles is improved. Finally, the purpose of improving the flotation process selectivity is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of micro-fine mineral flotation, and in particular to a periodic eddy current disturbance device for improving flotation selectivity. Background Art

[0002] Mineral flotation is a separation technology that utilizes differences in the hydrophobicity of mineral surfaces to separate target minerals from ore pulp. Common flotation equipment, such as mechanically agitated flotation cells, aerated jet flotation cells, Reflux flotation cells, and cyclone-static microbubble flotation columns, all experience a decrease in concentrate quality with increasing agitation or slurry velocity. This indicates that the high-energy state of turbulence-enhanced flow causes non-selective adhesion of non-target hydrophilic or weakly hydrophobic particles, resulting in the adhesion and bonding of non-target minerals to bubbles, leading to their incorporation into target minerals and a reduction in the quality of the resulting concentrate.

[0003] Regarding the problem of particle-bubble interaction, during the improvement and exploration process, technicians considered adding a jet field to the flotation column and using the water flow fluctuations in the jet field to change the interaction between particles and bubbles.

[0004] After searching, the patent document with application publication number CN116020665A discloses a fluidized coarse particle flotation device with adjustable water flow field and turbulence. The flotation device includes a flotation column, a connected water-gas mixer and a plurality of water-gas jet guns. The top of the flotation column is provided with a foam overflow trough, a concentrate discharge port and a feeding device, and the bottom of the flotation column is provided with a discharge port; the water-gas jet gun is provided with a jet zone extending into the interior of the flotation column for vertically spraying a mixed fluid of microbubbles and water-gas upwards, and the water-gas jet gun can adjust the angle between the jet zone and the radial direction of the circumference of the flotation column.

[0005] The flotation device described above uses a water-air jet gun to generate a jet zone that vertically sprays a mixture of microbubbles and water-air upward, forming an adjustable, fluidized microbubble and water bed with a stable flow field and turbulence. However, this fluidized microbubble and water bed serves only to address the technical problem of the relatively simple and crude distribution of bubbles and rising water within the flotation column, which is not conducive to uniform distribution of the interference bed. This prevents coarse particles from adhering to bubbles and then falling off, which can affect flotation performance.

[0006] Mineral flotation faces two extreme challenges: coarse particles are difficult to float due to their large mass and high inertia, making them prone to desorption and particularly vulnerable to unstable flow fields; and fine particles are difficult to float due to their small mass and difficulty colliding with bubbles. Consequently, most enhanced flotation devices for fine particles feature highly turbulent zones to promote collisions between fine particles and bubbles. This process easily causes non-selective adhesion of less hydrophobic particles, i.e., non-target minerals, to the bubbles. The fluidic mechanism proposed in CN116020665A aims to create an adjustable flow field with stable flow and turbulence levels. This prevents coarse particles from being desorbed from bubbles by an unstable flow field, while not promoting the desorption of non-target minerals from the bubbles.

[0007] To this end, we propose a periodic eddy current disturbance device for improving flotation selectivity to solve the problem of non-selective adhesion of fine minerals and bubbles. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems in the prior art and to propose a periodic eddy current disturbance device for improving flotation selectivity. The eddy current disturbance device is provided with a tube body in an expanded state and a contracted state. By switching from the expanded state to the contracted state, the slurry enters the flotation column foam separation section in a jet state and generates a periodic eddy current disturbance effect on the whole formed by non-target minerals and bubbles, thereby promoting the desorption and separation of fine non-target minerals and bubbles.

[0009] In order to solve the above problems, the present invention provides the following technical solutions:

[0010] A periodic vortex disturbance device for improving flotation selectivity includes a jet generator arranged on the froth separation section of a flotation column, the jet generator includes a tube body with a closed end and an open end, the open end is sealed and extends into the froth separation section of the flotation column so that the tube body and the inner cavity of the froth separation section of the flotation column are in a connected state, the tube body has an expansion state and a contraction state that can be switched to each other, when the tube body switches from the contraction state to the expansion state, the ore pulp in the froth separation section of the flotation column is drained into the tube body; when the tube body switches from the expansion state to the contraction state, the ore pulp in the tube body enters the froth separation section of the flotation column in a jet state, and forms a jet field in the froth separation section of the flotation column.

[0011] As a further solution of the present invention: the tube body can perform reciprocating telescopic movement along its axial direction, so that the size of its inner cavity can be adjusted to form the expanded state and the contracted state. The axial reciprocating telescopic movement of the tube body can cause the jet field to change periodically.

[0012] As a further solution of the present invention: a nozzle is provided at one end of the tube body extending into the froth separation section of the flotation column.

[0013] As a further solution of the present invention: the nozzle is a built-in filter structure.

[0014] As a further solution of the present invention: the jet generators are provided in a plurality and arranged in a circumferential array, and the state of the tube body on each jet generator changes synchronously.

[0015] As a further solution of the present invention: the disturbance device also includes a driving source for driving the tube body to switch between the expanded state and the contracted state, which can adjust the speed of driving the tube body to switch between the expanded state and the contracted state according to the differences in the properties of the floating fine minerals, thereby changing the intensity of the periodic eddy current disturbance flow field.

[0016] As a further solution of the present invention: the driving source includes a crank slider mechanism, the output end of the crank slider mechanism is connected to the closed end of the tube body, so that the tube body can perform reciprocating telescopic movement along its axial direction.

[0017] As a further solution of the present invention: the disturbance device also includes a controller, and the controller is electrically connected to the multiple groups of driving sources.

[0018] The present invention also provides a method for using a periodic eddy current disturbance device for improving flotation selectivity, comprising the following steps:

[0019] Step 1: Assembly: Install the periodic vortex disturbance device at the corresponding position of the flotation column foam separation section;

[0020] Step 2: Preparation: Make the flotation column foam separation section in normal fine mineral particle flotation working state;

[0021] Step 3: Disturbance: Start the driving source to make the tube body switch periodically between the expansion state and the contraction state, so as to generate a periodic jet disturbance flow field in the froth separation section of the flotation column. When the whole formed by the fine non-target mineral particles and bubbles passes through the jet field, the periodic jet field exerts a periodic eddy current disturbance effect on it, causing the bubbles to deform periodically, or exerts a periodic changing force on the particles through the water flow, thereby promoting the separation of non-target minerals and bubbles.

[0022] As a further solution of the present invention, it also includes a circulation pipeline, which is used to connect the bottom of the froth separation section of the flotation column with the water tank.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By freely switching between expansion and contraction states, the tube cleverly achieves alternating cycles of "suction" and "high-pressure injection" of the slurry. This dynamic process directly generates a controllable jet field within the froth separation section of the flotation column. This jet field can exert appropriate eddy current disturbances on the rising combination of fine, non-target mineral particles and bubbles, thereby causing the bubbles to deform periodically. Alternatively, the periodically varying force exerted on the particles by the water flow can destroy the weak adhesion between the fine, non-target mineral particles and bubbles, promoting the separation of non-target minerals from the bubbles, and ultimately achieving the goal of improving the flotation selectivity of fine particles.

[0025] 2. By reciprocating the tube's telescopic motion along its axial direction, the expansion state (elongation, enlargement of the inner cavity) and contraction state (shortening, reduction of the inner cavity) can be clearly and stably defined. This axial motion method has a relatively simple mechanical structure, is easy to achieve precise control, and can ensure significant changes in the tube's inner cavity volume, thereby effectively driving the periodic suction and injection process of the slurry.

[0026] 3. By adding a nozzle to the opening at one end of the tube that extends into the flotation column, the jet effect is significantly optimized. The nozzle can constrain, accelerate, and shape the ejected slurry flow, making the jet more concentrated, faster, and more directional. This not only enhances the intensity and disturbance energy of the jet field, making it more effective in stripping away fine, non-target mineral particle-bubble combinations, but also allows for more precise control of the jet's shape and impact range within the flotation column, avoiding unnecessary energy dispersion, thereby improving energy utilization efficiency and the targeted nature of the disturbance.

[0027] 4. By arranging multiple jet generators in a circumferential array and operating synchronously, comprehensive coverage and uniform disturbance of the cross-section of the froth separation section of the flotation column are achieved. While a single jet generator has a limited range of influence, the multi-device array arrangement eliminates blind spots of disturbance and forms a wide-ranging eddy current disturbance field throughout the froth separation area. Synchronous switching (all tubes expand or contract simultaneously) ensures the consistency of the disturbance in time and space, which is crucial for maintaining a locally disturbed yet generally stable fluid dynamic environment within the flotation column that is conducive to selective separation. This significantly improves the overall disturbance effect and process stability.

[0028] 5. The slider-crank mechanism is ideal for converting rotary motion into the required linear reciprocating motion. This mechanism offers a robust structure, smooth operation, and ease of maintenance. It also precisely controls stroke and speed, thereby precisely controlling the amplitude and frequency of tube expansion and contraction, ensuring that periodic jet disturbances are reliably and stably generated according to the set parameters.

[0029] 6. The periodic eddy current perturbation device operates by periodically switching the tube state through a drive source, generating a periodic jet field. This jet field then imparts eddy current perturbations to the passing microscopic, non-target mineral particle-bubble aggregates, causing them to separate. The entire device is simple to operate and its mechanism of action is clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the structure of the present invention Figure 2 ;

[0033] Figure 3 It is a schematic diagram of the layout structure of the present invention in a fine mineral flotation experimental system.

[0034] In the figure: 1. Tube body; 2. Nozzle; 3. Driving source; 4. Controller; 5. Gas source; 6. Pressure regulating valve; 7. Micro regulating valve; 8. Gas flow meter; 9. Main air flow valve; 10. Microbubble generator; 11. Stirring motor; 12. Water tank; 13. Three-way valve; 14. Peristaltic pump; 15. Electromagnetic flow meter; 16. Circulation pipeline; a. Flotation column foam separation section. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] To achieve a normal fine mineral flotation operating state in the flotation column foam separation section a, the present application constructs a fine particle flotation experimental system, the hardware components and connection relationships of which specifically include: an air flow branch, a slurry flow branch, a microbubble generator 10, a pipe flow mineralization section, and a flotation column foam separation section a. The air flow branch includes an air source 5, a pressure regulating valve 6, a micro-regulating valve 7, a gas flow meter 8, and a main air flow valve 9, which are arranged in sequence. A porous ceramic sheet is provided on the pipeline connecting the main air flow valve 9 and the microbubble generator 10. The slurry flow branch includes a stirring motor 11, a water tank 12, a three-way valve 13, a peristaltic pump 14, a hose, and an electromagnetic flowmeter 15. The outlet of the peristaltic pump 14 is connected to one end of the electromagnetic flowmeter 15 via a hose, and the other end of the electromagnetic flowmeter 15 is connected to the microbubble generator 10.

[0037] The experimental system workflow includes the following steps:

[0038] Step 1: Add the fine mineral particles to be selected, flotation reagents and water into the water tank 12, turn on the stirring motor 11, and the stirring motor 11 drives the impeller to perform mineral slurry treatment on the fine mineral particles, flotation reagents and water in the water tank 12;

[0039] Step 2: Open the three-way valve 13 on the slurry flow branch to connect the water tank 12 and the peristaltic pump 14 through the hose;

[0040] Step 3: Turn on the peristaltic pump 14, and adjust the flow rate of the slurry in the slurry flow branch by adjusting the speed of the peristaltic pump 14. When the flow rate of the slurry in the slurry flow branch reaches the set value as measured by the electromagnetic flowmeter 15, turn on the main airflow valve 9, and adjust the flow rate of the gas in the airflow branch to the set value by adjusting the pressure of the pressure regulating valve 6. The gas flow in the airflow branch can also be slightly adjusted by providing a micro-regulating valve 7 between the pressure regulating valve 6 and the gas flowmeter 8;

[0041] Step 4: After the above steps are carried out, the fine mineral particles in the slurry are captured by bubbles in the violent turbulence in the pipe flow mineralization section and enter the flotation column foam separation section a, and float up under the action of the buoyancy of the bubbles. The floating particles include the whole formed by the adhesion of fine mineral particles and bubbles, and the whole formed by the adhesion of fine non-target mineral particles and bubbles.

[0042] By sequentially setting the above steps, the state of the froth separation section a of the flotation column in step 4 is a normal fine mineral particle flotation working state.

[0043] The periodic eddy current disturbance device for improving flotation selectivity proposed in this application is arranged on the flotation column foam separation section a to act on the whole formed by the adhesion of fine non-target mineral particles and bubbles in the flotation column foam separation section a, so that the non-target minerals are desorbed and separated from the bubbles. This layout state can be Figure 3 To express.

[0044] like Figure 1-Figure 2As shown, specifically, the present application discloses a periodic vortex disturbance device for improving flotation selectivity, comprising a jet generator disposed on a flotation column foam separation section a. The jet generators are provided in a plurality and arranged in a circumferential array to generate a circumferentially uniform jet field within the flotation column separation section. Specifically, the jet generator comprises a tube body 1, the two ends of the tube body 1 being respectively configured as a closed end and an open end. The open end is sealed and extends into the flotation column foam separation section a, so that the tube body 1 is in communication with the inner cavity of the flotation column foam separation section a. The slurry within the flotation column separation section can flow into the tube body 1 through the open end for temporary storage. The tube body 1 has an expansion state and a contraction state that can be switched between each other. When the tube body 1 switches from the contraction state to the expansion state, the internal space of the tube body 1 changes from small to large, so the slurry in the flotation column foam separation section a is drained into the tube body 1 for temporary storage. The amount of temporarily stored slurry is determined by the expansion state capacity of the tube body 1; when the tube body 1 switches from the expansion state to the contraction state, the internal space of the tube body 1 changes from large to small, so the slurry in the tube body 1 will enter the flotation column foam separation section a. By controlling the switching speed from the expansion state to the contraction state, the slurry in the tube body 1 can enter the flotation column foam separation section a in a jet state, and form a jet field in the flotation column foam separation section a. The existence of the jet field is used to perform eddy current disturbance on the fine mineral particles floating in the flotation column foam separation section a, and the fine non-target mineral particles and bubbles with poor adhesion in the particulate matter will be desorbed and separated under the action of the eddy current disturbance.

[0045] At the same time, the open end of the tube body 1 in the present application is connected to the inner cavity of the flotation column foam separation section a, and the tube body 1 and the flotation column foam separation section a form a closed entity. Therefore, the slurry flows between the tube body 1 and the flotation column foam separation section a without changing its concentration. In other words, the present application achieves the effect of generating eddy current disturbance on fine non-target mineral particles and bubbles while maintaining the concentration of the slurry, thus ensuring the flotation effect of fine particles.

[0046] Regarding the design of the expanded and contracted states of the tube body 1, the tube body 1 can be configured as any component with contraction and expansion functions in the prior art, such as an airbag tube body, a telescopic tube body, etc. Taking the telescopic tube body as an example, the tube body 1 can reciprocate and retract along its axial direction, so that the size of its inner cavity can be adjusted to form an expanded state and a contracted state.

[0047] At the same time, in order to achieve the switching of the telescopic tube body between the expanded state and the contracted state, the present application also includes a driving source 3 for driving the tube body 1 to switch between the expanded state and the contracted state. The driving source 3 can be a component capable of reciprocating motion, such as an electric telescopic rod, an electric push rod, a crank slider mechanism, etc. in the prior art. Taking the crank slider mechanism as an example, the output end of the crank slider mechanism is connected to the closed end of the tube body 1. The reciprocating motion of the output end can drive the tube body 1 to reciprocate and extend along its axial direction, thereby achieving the switching between the expanded state and the telescopic state.

[0048] It should be noted that in the aforementioned case of multiple jet generators, in order to ensure a good eddy current disturbance effect on the desorption and separation of fine non-target mineral particles and bubbles, the present application preferably sets the state of the tubes 1 in the multiple jet generators to be synchronized, that is, the multiple tubes 1 are simultaneously in an expanded or contracted state. Based on this, the present application also includes a controller 4, which is electrically connected to the multiple groups of drive sources 3 to achieve synchronous operation of the multiple groups of drive sources 3.

[0049] Furthermore, the intensity of the periodic jet field generated can be adaptively adjusted, and the expansion and contraction frequency of the tube body 1 can control the frequency and amplitude of the periodic vibration of the jet field, thereby adjusting the disturbance intensity of the jet field on the bubble-particle flocs, so as to adapt to the characteristics of different fine-grained non-target minerals. On the basis of being able to adjust the switching frequency between the expansion state and the contraction state, the present application also provides a nozzle 2 at the open end of the tube body 1. The nozzle 2 can adopt different structures to generate separation vortices of different intensities and ranges to meet the application requirements of flotation separation systems of fine mineral particles of different densities, concentrations, and hydrophobicity, and improve the flotation selectivity. It should be noted that the selected nozzle structure needs to ensure that it does not interfere with the switching between the expansion state and the contraction state. In order to prevent the minerals in the flotation column foam separation section a from entering the tube body 1, the nozzle 2 can also be set as a built-in filter structure to allow only water to enter the tube body 1.

[0050] In combination with the above-designed fine mineral particle flotation experimental system, the present invention provides a method for using a periodic eddy current disturbance device for improving flotation selectivity, comprising the following steps:

[0051] Step 1: Install the periodic vortex disturbance device at the corresponding position of the froth separation section a of the flotation column;

[0052] Step 1: Add fine mineral particles, flotation reagents and water into the water tank 12, turn on the stirring motor 11, and the stirring motor 11 drives the impeller to process the mineral particles, flotation reagents and water in the water tank 12;

[0053] Step 2: Open the three-way valve 13 on the slurry flow branch to connect the water tank 12 and the peristaltic pump 14 through the hose;

[0054] Step 3: Turn on the peristaltic pump 14, and adjust the flow rate of the slurry in the slurry flow branch by adjusting the speed of the peristaltic pump 14. When the flow rate of the slurry in the slurry flow branch reaches the set value as measured by the electromagnetic flowmeter 15, turn on the main airflow valve 9, and adjust the flow rate of the gas in the airflow branch to the set value by adjusting the pressure of the pressure regulating valve 6. The gas flow in the airflow branch can also be slightly adjusted by providing a micro-regulating valve 7 between the pressure regulating valve 6 and the gas flowmeter 8;

[0055] Step 4: After the above steps are completed, the fine mineral particles in the slurry are captured by bubbles in the violent turbulence in the mineralization section of the pipe flow and enter the flotation column foam separation section a, and float up under the action of the buoyancy of the bubbles. The floating particles include the combination formed by the adhesion of target minerals and bubbles, and the combination formed by the adhesion of non-target minerals and bubbles.

[0056] Step 5: Turn on the controller 4 to make the multiple driving sources 3 move synchronously. During the continuous reciprocating expansion and contraction of the tube body 1, the slurry inside it generates a pulse jet field in the flotation column foam separation section a. When the combination of fine non-target mineral particles and bubbles passes through the jet field, the jet field exerts an eddy current disturbance on it, causing the bubbles to deform periodically, or applies a periodically changing force to the particles through the water flow, promoting the separation of fine non-target minerals and bubbles, and the fine non-target mineral particles will fall; in this process, due to the good adhesion effect between the fine target mineral particles and the bubbles, the target minerals will be discharged from the upper concentrate discharge port.

[0057] Step 6: After the concentrate recovery is completed, close the main air flow valve 9 and the peristaltic pump 14 in sequence, open the discharge end of the three-way valve 13 (not shown in the figure), and discharge the tailings at the bottom of the froth separation section a of the flotation column.

[0058] Preferably, in the above step 5, when the periodic jet flow field acts on the combination formed by the adhesion of the target mineral and the air bubbles, and the combination formed by the adhesion of the non-target mineral and the air bubbles, in order to prevent the desorption and separation of part of the target mineral from the air bubbles, thereby reducing the flotation recovery rate, the present application adds a circulation pipe 16 to the fine particle flotation experimental system, and the two ends of the circulation pipe 16 are respectively connected to the bottom of the flotation column foam separation section a and the water tank 12. When the target mineral is desorbed and separated from the air bubbles, the target mineral will fall to the bottom of the flotation column foam separation section a, and will be transported to the water tank 12 via the circulation pipe 16, and then circulated and transported to the flotation column foam separation section a via the water tank 12.

[0059] By adding the circulation pipe 16, the fine minerals mistakenly desorbed and separated can be transported back to the froth separation section a of the flotation column for flotation treatment again, thereby improving the flotation efficiency and accuracy.

[0060] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A periodic eddy current disturbance device for improving flotation selectivity, characterized in that: The invention comprises a jet generator arranged on a flotation column foam separation section (a), the jet generator comprising a tube body (1) having a closed end and an open end, the open end being sealed and extending into the flotation column foam separation section (a), so that the tube body (1) and the inner cavity of the flotation column foam separation section (a) are in a communicating state, the tube body (1) has an expansion state and a contraction state that can be switched to each other, when the tube body (1) switches from the contraction state to the expansion state, the ore pulp in the flotation column foam separation section (a) is drained into the tube body (1); when the tube body (1) switches from the expansion state to the contraction state, the ore pulp in the tube body (1) enters the flotation column foam separation section (a) in a jet state, and forms a jet field in the flotation column foam separation section (a).

2. A periodic eddy current disturbance device for improving flotation selectivity according to claim 1, characterized in that: The tube body (1) can perform reciprocating telescopic motion along its axial direction, so that the size of its inner cavity can be adjusted to form the expanded state and the contracted state. The axial reciprocating telescopic motion of the tube body (1) can cause the jet field to change periodically.

3. A periodic eddy current disturbance device for improving flotation selectivity according to claim 1, characterized in that: One end of the tube body (1) extending into the froth separation section (a) of the flotation column is provided with a nozzle (2).

4. A periodic eddy current disturbance device for improving flotation selectivity according to claim 3, characterized in that: The nozzle (2) is a built-in filter screen structure.

5. The periodic eddy current disturbance device for improving flotation selectivity according to claim 1, characterized in that: The jet generators are provided in a plurality and arranged in a circumferential array, and the state of the tube body (1) on each jet generator changes synchronously.

6. A periodic eddy current disturbance device for improving flotation selectivity according to claim 2, characterized in that: The disturbance device also includes a driving source (3) for driving the tube body (1) to switch between an expanded state and a contracted state.

7. A periodic eddy current disturbance device for improving flotation selectivity according to claim 6, characterized in that: The driving source (3) comprises a crank slider mechanism, the output end of which is connected to the closed end of the tube body (1), so that the tube body (1) can perform reciprocating telescopic motion along its axial direction.

8. A periodic eddy current disturbance device for improving flotation selectivity according to claim 7, characterized in that: The disturbance device further comprises a controller (4), which is electrically connected to the plurality of drive sources (3).

9. A method for using the periodic eddy current disturbance device for improving flotation selectivity according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Assembly: Install the periodic vortex disturbance device at the corresponding position of the froth separation section (a) of the flotation column; Step 2: Preparation: Make the flotation column foam separation section (a) in a normal fine mineral particle flotation working state; Step 3: Disturbance: Start the driving source (3) to make the tube body (1) switch periodically between the expansion state and the contraction state, so as to generate a periodic jet field in the flotation column foam separation section (a). When the whole formed by the fine non-target mineral particles and bubbles passes through the jet field, the jet field exerts a periodic eddy current disturbance effect on it, so that the non-target minerals are separated from the bubbles.

10. The method for using the periodic eddy current disturbance device for improving flotation selectivity according to claim 9, characterized in that: The invention also comprises a circulation pipe (16), which is used to connect the bottom of the froth separation section (a) of the flotation column with the water tank (12).

Images