Flow-field-controllable device for measuring stability of particles on surfaces of bubbles under flotation condition

Abstract

The utility model relates to a flow field controllable device for measuring the stability of particles on the surface of a bubble under a flotation condition. The device comprises a bubble moving device, a bubble generation regulator group, an observation chamber, an image acquisition device, a processing terminal, a turbulence generation device group and a solution circulating device, the observation chamber is divided into a flotation particle containing area, a turbulence interference area and a stable particle collecting area which are separated by detachable partition plates. The bubble generation regulator group can generate bubbles with adjustable diameters; the bubble moving device enables generated bubbles to achieve a preset moving path, the turbulence generating device set and the solution circulating device are used for regulating and controlling a flow field in the observation chamber and simulating a real flotation environment, ore grains in the turbulence interference area and the stable particle collecting area are collected, the proportion of falling ore grains is calculated, and the flotation effect is improved. The particle adhesion stability in a simulated environment can be quantitatively expressed; by means of the simulated flotation environment, monitoring of the bubble merging process in the environment is achieved through the bubble moving device.

Description

Technical Field

[0001] The utility model relates to the field of flotation, in particular to a device with controllable flow field for measuring the stability of particles on the surface of bubbles under flotation conditions. Background Art

[0002] Flotation is a technical method that uses bubbles as a selective carrier to separate different minerals at the interface by utilizing the differences in the physical and chemical properties of the particle surface. This method is currently one of the most effective and widely used methods for mineral separation.

[0003] In flotation technology, the interaction between particles and bubbles is the basis of flotation, and this interaction process directly affects the effectiveness of flotation. According to the microscopic mechanism model of flotation, the process of effective particles being captured by bubbles can be divided into three stages: collision between particles and bubbles, adhesion between particles and bubbles, and desorption of particles.

[0004] The efficiency of bubble capture of particles is affected by many factors, including the collision between particles and bubbles, contact time, surface characteristics of particles and bubbles, and the turbulence level of the slurry in the flotation cell.

[0005] The adhesion stability of bubbles and particles is the key to achieving effective flotation. The adhesion stability of bubbles and particles will have a significant impact on the flotation results. For example, during the flotation process, particles with low hydrophilicity may return to the pulp.

[0006] Turbulent environment generally occurs in the stirring and mixing area of ​​the flotation machine. In this area, the gas, solid and liquid phases are mixed violently, the airflow is cut and dispersed into bubbles, and the bubble group and the suspended particle group collide and contact a large number of times. Turbulence has a positive effect on flotation, but also has side effects under different conditions and has a certain degree of randomness.

[0007] Therefore, developing a device that can control the flow field intensity, simulate the real flotation environment, and measure the adhesion stability of mineral particles and monitor the bubble merger process in this environment has become a key technical problem that urgently needs to be solved in this field. Summary of the invention

[0008] The utility model aims to provide a device for measuring the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field, which can generate turbulence of different intensities to simulate a real flotation environment and directly measure the particle adhesion stability by regulating the bubble size and movement.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A device for determining the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field, characterized in that it comprises a bubble moving device, a bubble generating regulator group, an observation chamber, an image acquisition device and a processing terminal, a turbulence generating device, and a solution circulation device; the observation chamber comprises a flotation particle holding area, a turbulence interference area, and a stable particle collection area; the bubble generating regulator group is installed on the bubble moving device, and the bubble generating end faces the observation chamber; the bubble moving device drives the bubble generating regulation group to reciprocate in the flotation particle holding area, the turbulence interference area, and the stable particle collection area in turn; the image acquisition device is electrically connected to the processing terminal, and its monitoring area covers the observation chamber; the turbulence generating device has an action range of the turbulence interference area of ​​the observation chamber; the solution circulation device is used to make the solution in the observation chamber flow and circulate in turn from the flotation particle holding area, the turbulence interference area, and the stable particle collection area;

[0011] Furthermore, it also includes a mounting plate and an optical platform lifting slide, wherein the mounting plate is used to fix the bubble moving device and the observation chamber, and the optical platform lifting slide is used to place the optical platform, on which the observation chamber is fixed;

[0012] Furthermore, the bubble moving device includes a cross slide group and a servo motor group, the servo motor group is electrically connected to the processing terminal; the bubble generating regulator group is installed on the cross slide group; the servo motor group is used to drive the cross slide group; the cross slide group includes a first cross slide and a second cross slide, the first cross slide and the second cross slide both include a transverse axis, a transverse slider, a longitudinal axis and a longitudinal slider, the transverse axis is fixedly mounted on the mounting plate, and the transverse slider is slidably connected to the transverse axis; the transverse slider is fixedly connected to the longitudinal axis, and the longitudinal slider is slidably connected to the longitudinal axis.

[0013] Furthermore, the bubble generating regulator group includes a first bubble generating regulator and a second bubble generating regulator, and the first bubble generating regulator and the second bubble generating regulator both include a capillary, a fixing clamp and a push-pull injection pump; the capillary is fixed to the slider by the fixing clamp, and the capillary is connected to the push-pull injection pump by an air pipe.

[0014] Furthermore, the image acquisition device includes a camera, a camera moving platform and a light-emitting device; the camera is fixed to the camera moving platform and is used to monitor the front of the observation room; the light-emitting device is used to provide light into the observation room.

[0015] Furthermore, a reserved groove is provided at the bottom of the flotation particle holding area of ​​the observation chamber, and the reserved groove is a small square groove recessed into the bottom plate with a certain thickness.

[0016] Furthermore, the turbulence generating device comprises a magnetic stirring rotor and a magnetic stirrer, the magnetic stirring rotor is placed in the turbulence interference area of ​​the observation chamber, and the placement platform of the magnetic stirrer is attached to the bottom of the observation chamber;

[0017] Furthermore, the solution circulation device comprises a driver, a pump head and a hose; the driver is connected to the pump head; the hose comprises a first section hose and a second section hose, the first section hose connects the flotation particle holding area of ​​the observation chamber and the pump head, and the second section hose connects the stable particle collection area of ​​the observation chamber (3) and the pump head.

[0018] The advantages of this utility model are:

[0019] The utility model has a simple structure and a clear principle. It can adjust the degree of turbulent interference, accurately control the bubble diameter, and drive the bubbles and mineral particles to move relative to each other, thus providing an equipment basis for measuring the adhesion stability of mineral particles and monitoring the bubble merging process in a turbulent environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a device for measuring the stability of particles on the surface of bubbles under flotation conditions with controllable flow fields according to the utility model;

[0021] Figure 2 It is a front view of the device for measuring the stability of particles on the surface of bubbles under flotation conditions with controllable flow field of the utility model;

[0022] Figure 3 It is a right view of the device for measuring the stability of particles on the surface of bubbles under flotation conditions with controllable flow field of the utility model;

[0023] Among them, 1-bubble moving device, 2-bubble generating regulator group, 3-servo motor group, 4-cross slide group, 5-observation chamber, 6-camera, 7-turbulence generating device, 8-light emitting device, 9-optical platform lifting slide, 10-optical breadboard, 11-mounting plate, 12-fixing clamp, 13-capillary, 14-magnetic stirring rotor, 15-magnetic stirrer, 16-solution circulation device, 17-driver, 18-hose, 19-pump head, 20-push-pull injection pump, 21-processing terminal, 22-camera moving platform. DETAILED DESCRIPTION

[0024] In order to demonstrate the basic principle and main functions of the utility model and make it easier to understand and use, the following is an explanation in conjunction with a specific usage scenario.

[0025] In the description of the present invention, it should be noted that the terms "upward", "downward", "left", "right" and other directional relationships are only based on the positional relationships shown in the accompanying drawings, and are only used to describe the method of using the present invention, and are not used as conditions to limit the use of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "adjustment degree", "several times" and "prescribed number of times" do not have clear numerical provisions, and ordinary technicians in this field can determine them according to actual experimental requirements.

[0027] Next, combine Figure 1-Figure 3 The present invention is further described by means of specific embodiments:

[0028] A device for determining the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field, characterized in that it includes a bubble moving device 1, a bubble generating regulator group 2, an observation chamber 5, a turbulence generating device 7, an image acquisition device and a processing terminal 21, and a solution circulation device 16; the observation chamber 5 includes a flotation particle holding area, a turbulence interference area, and a stable particle collection area; the bubble generating regulator group 2 is installed on the bubble moving device 1, and the bubble generating end faces the observation chamber 5; the bubble moving device 1 drives the bubble generating regulator group 2 to reciprocate in the flotation particle holding area, the turbulence interference area, and the stable particle collection area in turn; the image acquisition device is electrically connected to the processing terminal 21, and its monitoring area covers the observation chamber 5; the turbulence generating device 7 has an action range of the turbulence interference area of ​​the observation chamber 5; the solution circulation device 16 is used to make the solution in the observation chamber flow and circulate in turn from the flotation particle holding area, the turbulence interference area, and the stable particle collection area;

[0029] In order to further implement the above technical solution, it also includes an optical platform lifting slide 9 and a mounting plate 11, the mounting plate 11 is used to fix the bubble moving device 1 and the observation chamber 5, and the optical platform lifting slide 9 is used to place the optical platform, and the observation chamber 5 is fixed thereon;

[0030] In order to further implement the above technical solution, the bubble moving device 1 includes a servo motor group 3 and a cross slide group 4, and the bubble generating regulator group 2 is installed on the bubble moving device 1, and the bubble generating end faces the observation chamber 5; the bubble moving device 1 drives the bubble generating regulator group 2 to reciprocate in the flotation particle holding area, the turbulence interference area and the stable particle collection area in turn; the image acquisition device is electrically connected to the processing terminal 21, and its monitoring area covers the observation chamber 5; the turbulence generating device 7 has an action range of the turbulence interference area of ​​the observation chamber 5; the solution circulation device 16 is used to make the solution in the observation chamber flow and circulate in turn from the flotation particle holding area, the turbulence interference area and the stable particle collection area;

[0031] In order to further implement the above technical solution, it also includes an optical platform lifting slide 9 and a mounting plate 11, the mounting plate 11 is used to fix the bubble moving device 1 and the observation chamber 5, and the optical platform lifting slide 9 is used to place the optical platform, and the observation chamber 5 is fixed thereon;

[0032] In order to further implement the above technical scheme, the bubble moving device 1 includes a servo motor group 3 and a cross slide group 4, the servo motor group 3 is electrically connected to the processing terminal 21; the bubble generating regulator group 2 is installed on the cross slide group 4; the servo motor group 3 is used to drive the cross slide group 4; the cross slide group 4 includes a first cross slide and a second cross slide, the first cross slide and the second cross slide both include a transverse axis, a transverse slider, a longitudinal axis and a longitudinal slider, the transverse axis is fixedly installed on the mounting plate 11, and the transverse slider is slidably connected to the transverse axis; the transverse slider is fixedly connected to the longitudinal axis, and the longitudinal slider is slidably connected to the longitudinal axis.

[0033] In order to further implement the above technical solution, the bubble generating regulator group 2 includes a first bubble generating regulator and a second bubble generating regulator, and the first bubble generating regulator and the second bubble generating regulator both include a fixing clamp 12, a capillary 13 and a push-pull injection pump 20; the capillary 13 is fixed on the slider by the fixing clamp 12, and the capillary 13 is connected to the push-pull injection pump 20 by an air pipe.

[0034] In order to further implement the above technical solution, the image acquisition device includes a camera 6, a light-emitting device 8, and a camera moving platform 22; the camera 6 is fixed to the camera moving platform 22 and is used to monitor the front of the observation room 5; the light-emitting device 8 is used to provide light to the observation room 5.

[0035] In order to further implement the above technical solution, a reserved groove is provided at the bottom of the flotation particle holding area of ​​the observation chamber 5, and the reserved groove is a small square groove recessed into the bottom plate with a certain thickness.

[0036] In order to further implement the above technical solution, the turbulence generating device 7 includes a push-pull injection pump 18 and a magnetic stirrer 15. The push-pull injection pump 18 is placed in the turbulence interference area of ​​the observation chamber 5, and the placement table of the magnetic stirrer 15 is attached to the bottom of the observation chamber 5.

[0037] In order to further implement the above technical solution, the solution circulation device 16 includes a driver 17, a pump head 19 and a hose 18; the driver 17 is connected to the pump head 19; the hose 18 includes a first section hose and a second section hose, the first section hose connects the flotation particle holding area of ​​the observation chamber 5 and the pump head 19, and the second section hose connects the stable particle collection area of ​​the observation chamber 5 and the pump head 19.

[0038] Determine the adhesion stability of mineral particles,

[0039] S1: Place the magnetic stirring rotor 14 in the turbulent interference area of ​​the observation chamber 5 so that it does not hit the wall during rotation, and fills and flattens the ore sample in the reserved groove in the flotation particle holding area;

[0040] S2: slowly pour the test solution into the observation chamber 5 so that it does not disperse the ore sample;

[0041] S3: The processing terminal 21 drives the bubble moving device 1 through the servo motor group 3 to immerse the capillary 13 in the solution, and automatically generates bubbles of a certain volume through the preset program of the push-pull injection pump 20.

[0042] S4: The bubble moving device 1 moves the bubble downwards, and after contacting with the ore sample in the reserved tank for a certain period of time, moves upwards to a height higher than the baffle to allow the bubble to pass through, and moves below the solution height to prevent the bubble from bursting, and then drives the bubble to move to the right to pass through the turbulent interference zone;

[0043] S5: Turn on the magnetic stirrer 15 to drive the magnetic stirring rotor 14 to rotate, generate a vortex in the turbulent interference zone of the observation chamber 5, and form a turbulent environment, so as to simulate the effect of the stirrer in the real flotation environment. By adjusting the control knob of the magnetic stirrer 15, the speed of the magnetic stirring rotor 14 is controlled, so that the turbulence degree in the turbulent interference zone can be adjusted;

[0044] S6: Turn on the driver 17 to start the solution circulation device 16, and the test solution flows from the flotation particle holding area of ​​the observation chamber 5 to the stable particle collection area, so as to simulate the flow of slurry in a real flotation environment. By adjusting the power of the driver 17, the flow rate and flow velocity of the circulating solution are controlled;

[0045] S7: When the bubbles pass through the turbulent interference zone, they are disturbed by the vortex driven by the magnetic stirring rotor 14 and the flow disturbance caused by the flow of the test solution. The unstable mineral particles adsorbed on the bubbles will fall off and stay in the turbulent interference zone under the blockage of the partition.

[0046] S8: The bubble moving device 1 drives the bubble to continue to move to the stable particle collection area, and then moves upward. The bubble breaks after leaving the liquid surface, and the stable particles attached to the bubble settle and fall into the stable particle collection area.

[0047] S9: The bubble is restored to its original position by the bubble moving device 1, and S3-S8 are repeated a certain number of times and then stopped. The mineral particles in the turbulent interference area and the stable particle collection area are collected. The proportional relationship can directly indicate the adhesion stability of the mineral sample.

[0048] Monitor the bubble coalescence process in a simulated real flotation environment.

[0049] S1: Remove the detachable partition of the observation chamber 5, replace the capillaries 13 of the bubble generating regulator group 2 on the left and right sides with L-shaped capillaries, add the test solution into the observation chamber 5, and drive the capillaries 13 into the solution through the servo motor group 3;

[0050] S2: Turn on the magnetic stirrer 15 to drive the magnetic stirring rotor 14 to start rotating, and at the same time turn on the driver 17 to operate the solution circulation device 16 to form a simulated real flotation environment in the observation chamber 5;

[0051] S3: Bubbles of a certain volume are generated at the orifices of the left and right capillaries 13 through the push-pull injection pump 20, and the bubble moving device 1 is used to move the bubble on the left to the right and the bubble on the right to the left. By adjusting the bubble movement speed, a camera is used to monitor the merging process of the two bubbles under different conditions.

[0052] The above description is only for describing the main functions and advantages of the utility model, and can be applied according to actual conditions.

Claims

1. A device for measuring the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field, characterized in that: The invention comprises a bubble moving device (1), a bubble generating regulator group (2), an observation chamber (5), a turbulence generating device (7), an image acquisition device and a processing terminal (21), and a solution circulation device (16); the observation chamber (5) comprises a flotation particle holding area, a turbulence interference area and a stable particle collection area; the bubble generating regulator group (2) is mounted on the bubble moving device (1), and the bubble generating end faces the observation chamber (5); the bubble moving device (1) drives the bubble generating regulator group (2) to perform reciprocating motion in the flotation particle holding area, the turbulence interference area and the stable particle collection area in sequence; the image acquisition device is electrically connected to the processing terminal (21), and its monitoring area covers the observation chamber (5); the turbulence generating device (7) has an action range of the turbulence interference area of ​​the observation chamber (5); the solution circulation device (16) is used to make the solution in the observation chamber (5) flow and circulate in sequence from the flotation particle holding area, the turbulence interference area and the stable particle collection area; It also comprises an optical platform lifting slide (9) and a mounting plate (11), wherein the mounting plate (11) is used to fix the bubble moving device (1) and the observation chamber (5), and the optical platform lifting slide (9) is used to place the optical platform, on which the observation chamber (5) is fixed; The bubble moving device (1) comprises a servo motor group (3) and a cross slide group (4), wherein the servo motor group (3) is electrically connected to the processing terminal (21); the bubble generating regulator group (2) is mounted on the cross slide group (4); the servo motor group (3) is used to drive the cross slide group (4); the cross slide group (4) comprises a first cross slide and a second cross slide, wherein the first cross slide and the second cross slide both comprise a transverse axis, a transverse slider, a longitudinal axis and a longitudinal slider, wherein the transverse axis is fixedly mounted on the mounting plate (11), and the transverse slider is slidably connected to the transverse axis; the transverse slider is fixedly connected to the longitudinal axis, and the longitudinal slider is slidably connected to the longitudinal axis.

2. The device for measuring the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field according to claim 1, characterized in that: The bubble generating regulator group (2) comprises a first bubble generating regulator and a second bubble generating regulator, and the first bubble generating regulator and the second bubble generating regulator both comprise a fixing clamp (12), a capillary (13) and a push-pull injection pump (20); the capillary (13) is fixed on a slider by the fixing clamp (12), and the capillary (13) is connected to the push-pull injection pump (20) by an air pipe.

3. The device for measuring the stability of particles on the bubble surface under flotation conditions with a controllable flow field according to claim 1, characterized in that: The image acquisition device comprises a camera (6), a light emitting device (8) and a camera moving platform (22); the camera (6) is fixed to the camera moving platform (22) and is used to monitor the front of the observation room (5); the light emitting device (8) is used to provide light into the observation room (5).

4. The device for measuring the stability of particles on the bubble surface under flotation conditions with a controllable flow field according to claim 1, characterized in that: A reserved groove is provided at the bottom of the flotation particle holding area of ​​the observation chamber (5), and the reserved groove is a small square groove recessed into the bottom plate with a certain thickness.

5. The device for measuring the stability of particles on the bubble surface under flotation conditions with a controllable flow field according to claim 1, characterized in that: The turbulence generating device (7) comprises a magnetic stirring rotor (14) and a magnetic stirrer (15); the magnetic stirring rotor (14) is placed in the turbulence interference area of ​​the observation chamber (5); and the placement platform of the magnetic stirrer (15) is attached to the bottom of the observation chamber (5).

6. The device for measuring the stability of particles on the surface of bubbles under flotation conditions with a controllable flow field according to claim 1, characterized in that: The solution circulation device (16) comprises a driver (17), a hose (18) and a pump head (19); the driver (17) is connected to the pump head (19); the hose (18) comprises a first section of hose and a second section of hose, the first section of hose connecting the flotation particle holding area of ​​the observation chamber (5) and the pump head (19), and the second section of hose connecting the stable particle collecting area of ​​the observation chamber (5) and the pump head (19).

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