Internal and external nested combined mineralization flotation equipment

Abstract

The invention relates to internal and external nested combined mineralization flotation equipment. The flotation equipment comprises a tank body, a mineralization device, an air charging device and a driving device, the mineralization device comprises a rotor assembly and a mineralization tank, the mineralization tank is located in the tank body and arranged on the bottom wall of the tank body, a mechanical stirring cavity is formed in the mineralization tank, a slurry inlet is formed in the bottom of the mineralization tank, a slurry outlet is formed in the top of the mineralization tank, and a column selection area is formed by the area between the outer circumferential wall of the mineralization tank and the inner circumferential wall of the tank body. The rotor assembly comprises a rotating shaft and a rotor, the lower end of the rotating shaft extends into the mechanical stirring cavity, the rotor is installed at the lower end of the rotating shaft and located in the mechanical stirring cavity, the inflation device communicates with the column selection area, and the driving device is arranged above the tank body and connected with the rotating shaft. The internal and external nested combined mineralization flotation equipment is reasonable in structural design, the axial size is reduced, and the flotation effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flotation, in particular to an internal and external nested combined mineralization flotation device. Background Art

[0002] Flotation is a widely used mineral processing method. Flotation usually includes mechanical stirring flotation and aeration stirring flotation. Mechanical stirring flotation machines are usually called flotation machines, and aeration stirring flotation machines are usually called flotation columns. Related art proposes to combine mechanical stirring flotation machines and aeration stirring flotation columns for flotation to improve the flotation effect. However, the combined flotation machines in related art have problems such as unreasonable structural design, large height, poor safety, and poor flotation effect. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an internal-external nested combined mineralized flotation device, which has a reasonable structural design, a reduced axial size, and an improved flotation effect.

[0005] The internal and external nested combined mineralization flotation equipment of the embodiment of the present invention comprises: a tank body; a mineralization device, wherein the mineralization device comprises a rotor assembly and a mineralization tank, wherein the mineralization tank is located in the tank body and is arranged on the bottom wall of the tank body, wherein the mineralization tank has a mechanical stirring chamber for mechanically stirring the slurry, wherein the mineralization tank is provided with a slurry inlet for supplying the slurry into the mechanical stirring chamber, wherein the top of the mineralization tank is provided with a slurry outlet for discharging the slurry, wherein the area between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the tank body constitutes a column selection area, wherein the rotor assembly comprises a rotating shaft and A rotor, wherein the lower end of the rotating shaft extends into the mechanical stirring chamber, the rotor is mounted at the lower end of the rotating shaft and is located in the mechanical stirring chamber, and the rotating shaft is provided with a gas supply channel for supplying gas to the mechanical stirring chamber; an inflation device, the inflation device is connected to the column selection area, and is used to fill gas into the column selection area, so as to column select the slurry entering the column selection area from the mechanical stirring chamber in the column selection area; a driving device, the driving device is arranged above the trough body and is connected to the rotating shaft, so as to drive the rotating shaft and the rotor to rotate.

[0006] According to the internal and external nested combined mineralization flotation equipment of the embodiment of the present invention, during mineralization, the slurry is introduced into the mineralization tank from bottom to top through the slurry inlet, the rotor rotates and stirs in the mechanical stirring chamber, the air is broken up to form tiny bubbles, the target particles are attached to the bubbles to form mineralized bubbles, and the slurry containing mineralized bubbles and particles not attached to the bubbles can flow out from the slurry outlet of the mineralization tank, and the mineralized bubbles flow upward. The area between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the tank body constitutes a column selection area surrounding the mineralization tank, so the slurry containing other particles not attached to the bubbles can flow out from the slurry outlet of the mineralization tank and directly enter the column selection area. Under the action of the gas supplied by the inflating device, the particles not attached to the bubbles can be column selected in the column selection area, and the mineralized bubbles generated after the column selection flow upward. The flotation equipment of the embodiment of the present invention adopts an internal and external nested combined structure, which can reduce the axial size of the flotation equipment, reduce the problem of up and down convection between the particles not attached to the bubbles after mechanical stirring and the mineralized bubbles after column selection, and is conducive to improving the flotation effect and flotation efficiency.

[0007] In some embodiments, the mineralization tank comprises a cylinder and a tank bottom, wherein the tank bottom is connected to the lower end of the cylinder.

[0008] In some embodiments, a plurality of turbulence enhancement plates are disposed in the mechanical stirring chamber, and the plurality of turbulence enhancement plates are arranged at intervals along the circumference of the mineralization tank and surround the rotor.

[0009] In some embodiments, a plurality of first baffles are provided in the mechanical stirring chamber, and the plurality of first baffles are arranged at intervals along the circumference of the cylinder and are higher than the rotor. In the horizontal projection of the mineralization tank, the first baffles extend inwardly beyond the outer contour line of the rotor.

[0010] In some embodiments, a plurality of second baffles are provided in the mechanical stirring chamber, and the plurality of second baffles are arranged at circumferential intervals along the bottom of the trough and are lower than the rotor. In the horizontal projection of the mineralization trough, the second baffles extend inwardly beyond the outer contour line of the rotor.

[0011] In some embodiments, the rotor is an impeller, the outer diameter of the impeller is A, and the gap between the outer edge of the impeller and the inner edge of the turbulence enhancement plate in the radial direction of the rotating shaft is B, wherein 0.03A≤B≤0.2A.

[0012] In some embodiments, the trough body is provided with an upper area located above the mineralization trough, and the trough body is provided with a turbulence suppression grid, the turbulence suppression grid is located in the column selection area and adjacent to the upper area and / or the turbulence suppression grid is located in the lower part of the upper area.

[0013] In some embodiments, the tank body is provided with an upper area located above the mineralization tank, and the tank body is provided with a turbulence suppression grid located in the upper area and / or the column selection area, and the position of the turbulence suppression grid in the up and down directions is adjustable.

[0014] In some embodiments, the rotor is an impeller, which is located in the mechanical stirring chamber. The impeller includes a wheel disc and a plurality of blades. The wheel disc is installed at the lower end of the rotating shaft. The plurality of blades are arranged at intervals along the circumference of the wheel disc on the outer peripheral edge of the wheel disc. In the longitudinal section of the impeller, the contour line of the outer side surface of the blade includes a vertical segment and an arc segment. The arc segment is arranged at the upper segment of the vertical segment and gradually extends inward.

[0015] In some embodiments, the wheel disc has a jet channel in communication with the air supply channel in the rotating shaft, and jet outlets of the jet channel are formed on the outer peripheral surface of the wheel disc and are arranged at intervals along the circumference of the wheel disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an internal and external nested combined mineralization flotation device according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the mineralization tank and rotor of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of a mineralization device of an inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0019] Figure 4 It is a partial cross-sectional schematic diagram of a mineralization device of an inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the rotor of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0021] Figure 6 It is a partial cross-sectional schematic diagram of the rotor of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of a rotor of an inner-outer nested combined mineralization flotation device according to another embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of a turbulence reinforcement plate of an inner-outer nested combined mineralization flotation device according to an embodiment of the present invention.

[0024] Fig. 9It is a top view schematic diagram of a tank body and a bubble scraping device of an inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0025] Fig.10 It is a schematic diagram of a rake frame of an inner-outer nested combined mineralization flotation equipment according to an embodiment of the present invention.

[0026] Fig.11 It is a top view schematic diagram of a turbulence suppression grid of an inner-outer nested combined mineralization flotation device according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] 1. Mineralization tank; 11. Slurry inlet; 12. Slurry outlet; 13. Mechanical stirring chamber; 14. Cylinder; 15. Tank bottom; 16. Turbulence reinforcement plate; 161. Second hollow hole; 17. First baffle; 18. Second baffle; 19. Line segment;

[0029] 2. rotor assembly; 21. rotating shaft; 211. air supply channel; 22. rotor; 221. hub; 222. wheel disc; 2220. jet channel; 223. blade; 2231. upper blade; 2232. lower blade; 2233. first hollow hole; 2234. vertical section; 2235. arc section; 224. top plate; 225. bottom plate;

[0030] 31. Cover plate; 311. Flow hole; 32. Feed pipe; 33. Feed box; 34. Anti-settling assembly; 341. Rake frame; 342. Spray gun; 35. Turbulence suppression grid;

[0031] 4. trough body; 41. column selection area; 42. upper area;

[0032] 5. Inflatable device;

[0033] 6. Bubble scraping device; 61. Scraper. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] Please refer to the following Figures 1 to 11 The internal and external nested combined mineralization flotation equipment according to the embodiment of the present invention is described.

[0036] like Figures 1 to 4 As shown, the internal and external nested combined mineralization flotation equipment of the embodiment of the present invention comprises: a tank body 4, a mineralization device, an aeration device 5 and a driving device. The mineralization tank is located in the tank body and is arranged on the bottom wall of the tank body, and the area between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4 constitutes a column selection area 41 surrounding the mineralization tank 1.

[0037] The mineralization device includes a rotor assembly 2 and a mineralization tank 1. The mineralization tank 1 has a mechanical stirring chamber 13 for mechanically stirring the slurry. The bottom of the mineralization tank 1 is provided with a slurry inlet 11 for supplying the slurry into the mechanical stirring chamber 13. The top of the mineralization tank 1 is provided with a slurry outlet 12 for discharging the slurry. It can be understood that the slurry coming out of the mechanical stirring chamber 13 includes target particles attached to the bubbles and other particles (target particles not attached to the bubbles or other non-target particles).

[0038] The rotor assembly 2 includes a rotating shaft 21 and a rotor 22. The lower end of the rotating shaft 21 extends into the mechanical stirring chamber 13. The rotor 22 is installed at the lower end of the rotating shaft 21 and is located in the mechanical stirring chamber 13. The rotating shaft 21 is provided with a gas supply channel 211 for supplying gas to the mechanical stirring chamber 13. That is, under the mechanical stirring action of the rotor assembly 2, the target particles in the slurry and the air supplied into the mechanical stirring chamber 13 are attached to the bubbles to form mineralized bubbles, thereby realizing mechanical stirring flotation.

[0039] The gas charging device 5 is connected to the column selection area 41 and is used to charge gas into the column selection area 41 to perform column selection on the slurry entering the column selection area 41 from the mechanical stirring chamber 13. The driving device is arranged above the tank body 4 and connected to the rotating shaft 21 to drive the rotating shaft 21 and the rotor 22 to rotate.

[0040] According to the internal and external nested combined mineralization flotation equipment of the embodiment of the present invention, during mineralization, the slurry is introduced into the mineralization tank 1 from bottom to top through the slurry inlet 11, and the rotor 22 rotates and stirs in the mechanical stirring chamber 13 to break up the air to form tiny bubbles, and the target particles are attached to the bubbles to form mineralized bubbles. The slurry containing mineralized bubbles and particles not attached to the bubbles can flow out from the slurry outlet 12 of the mineralization tank 1, and the mineralized bubbles flow upward. The area between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4 constitutes a column selection area 41 surrounding the mineralization tank 1, so the slurry containing other particles not attached to the bubbles can flow out from the slurry outlet 12 of the mineralization tank 1 and directly enter the column selection area 41. Under the action of the gas supplied by the aeration device 5, the particles not attached to the bubbles can be column selected in the column selection area 41, and the mineralized bubbles generated after the column selection flow upward. The flotation equipment of the embodiment of the present invention adopts an internal and external nested combination structure, which can reduce the axial size of the flotation equipment and reduce the problem of upward and downward convection between particles not attached to bubbles after mechanical stirring and mineralized bubbles after column selection, which is beneficial to improving the flotation effect and flotation efficiency.

[0041] Specifically, an upper region 42 is provided in the tank body 4, and the upper region 42 is provided above the mineralization tank 1. The mineralized bubbles generated after mechanical stirring and the mineralized bubbles generated after column selection all flow upward to the upper region 42.

[0042] In the related art, the upper area 42, the mechanical stirring area and the column selection area 41 are arranged in sequence along the up and down directions of the tank body 4. The flow direction of the slurry after mechanical stirring entering the column selection area 41 is opposite to the direction in which the mineralized bubbles of the column selection enter the upper area 42 from the column selection area 41, which affects the mineralization and flotation effects.

[0043] The inner and outer nested combined mineralization flotation equipment of the embodiment of the present invention forms a column selection area 41 surrounding the mineralization tank 1 in the area between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4, so that the column selection mineralization process can be mainly carried out between the mineralization tank 1 and the inner wall of the tank body 4, which is beneficial to reduce the overall height of the equipment and reduce the adverse effects of the upward and downward convection of particles not attached to the bubbles after mechanical stirring and the mineralized bubbles selected by the column selection on the flotation effect.

[0044] It can be understood that mineralization refers to the selective adhesion process of target particles and bubbles. After mineralization, the slurry includes mineralized bubbles (mineralized bubbles can be called mineralized foam after aggregation. In the following description, mineralized bubbles and mineralized foam can be used interchangeably) and other particles not attached to the bubbles. Mineralized bubbles are target particles attached to bubbles. Here, the target particles attached to the bubbles can also be called mineralized particles. Other particles may include target particles not attached to the bubbles, non-target mineral particles not attached to the bubbles, and tailings particles.

[0045] For example, a discharge port is provided at the bottom of the tank body 4, and other particles that are not attached to the bubbles after column selection fall to the bottom of the tank body 4 under the action of gravity and are discharged through the discharge port. The driving device can be a combination structure of a driving motor and a pulley assembly, that is, the driving motor drives the pulley assembly to rotate, and the pulley assembly drives the rotating shaft 21 to rotate synchronously.

[0046] In the related art, mineralization is carried out in the mineralization tank of the flotation equipment, and the slurry is introduced into the mineralization tank from the outside, and mineralization is carried out under the action of gas supply and mechanical stirring in the slurry. However, the inventors have found that due to the large space in the mineralization tank, the mineralization and flotation effects are poor and the flotation efficiency is not high. To this end, the related art proposes to set a parabolic basin-shaped reflection bottom in the mineralization tank, the slurry and gas are supplied into the reflection bottom, and mechanical stirring is carried out in the reflection bottom to achieve bubble mineralization. The reflection bottom reflects the slurry containing mineralized bubbles upward out of the reflection bottom to improve the flotation efficiency, but the inventors find that there are still problems of poor mineralization and flotation effects and low efficiency. The inventors have found through research that compared with mineralization in the mineralization tank, the flotation efficiency can be improved to a certain extent by the reflection effect of the reflection bottom, but because the top of the reflection bottom is open, the stirred slurry is quickly discharged from the reflection bottom under the reflection effect of the reflection bottom, and the residence time is short, thereby affecting the mineralization effect.

[0047] In order to further improve the mineralization and flotation effects and improve the flotation efficiency, the inventors proposed a scheme of confined mineralization. The so-called confined mineralization refers to the mineralization being carried out in a relatively closed and relatively narrow limited space compared with the related art. The limited space can also be called a confined space, a restricted area, a limited area or a restricted area, referred to as a confined area. For example, the confined area is smaller and relatively closed than the inner cavity of the mineralization tank in the related art, and is relatively closed compared with the open parabolic reflection bottom in the related art. During the mineralization process, the slurry and gas are introduced into the confined space, and mechanical stirring is carried out in the confined space, so that the air can form more bubbles. The bubbles and the target particles in the slurry are repeatedly reflected, stirred and collided with each other in the confined space, which increases the contact time, contact times and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effects, and then improving the efficiency. Therefore, in the present invention, the mineralization carried out in a confined space can be called confined mineralization.

[0048] Specifically, Figure 1 and Figure 2 As shown, the mineralization device also includes a cover plate 31, which is arranged above the mineralization tank 1, wherein the cover plate 31 is opposite to the slurry outlet 12 and is spaced apart from the top surface of the mineralization tank 1 so that the mineralized slurry can flow out. It can be understood that the cover plate 31 and the mineralization tank 1 define a restricted mineralization area including the mechanical stirring chamber 13. The flotation equipment of the embodiment of the present invention improves the sealing of the mechanical stirring chamber 13 by arranging the cover plate 31 above the mineralization tank 1, and can prolong the time of reflection, rectification and surging of the slurry in the mechanical stirring chamber 13, so as to increase the contact time, contact number and collision number of bubbles and target particles, thereby improving the mineralization and flotation effect. In addition, the flow field disturbance formed by the rotation of the rotor 22 is blocked by the cover plate 31, which can make the turbulence intensity in the lower side of the upper area 42 above the mechanical stirring chamber 13 lower, which is conducive to the rise of mineralized bubbles.

[0049] In other words, the turbulence of the slurry is more intense in the relatively closed and relatively small area of ​​the mineralization tank 1 with the cover plate 31, the bubbles are smaller, and it is easier to capture fine particles. The mineralized bubbles flow more smoothly at the lower side of the upper area 42 above the mechanical stirring chamber 13, and the attached particles are more stable and not easy to fall off.

[0050] The distance between the cover plate 31 and the top surface of the mineralization tank 1 can be adaptively adjusted according to different types of slurries, which is not limited in the embodiment of the present invention.

[0051] In other examples, such as Figure 3As shown, the cover plate 31 covers the slurry outlet 12 and is provided with a flow hole 311 for connecting the mechanical stirring chamber 13 and the outside of the mechanical stirring chamber 13. It can be understood that the mineralized slurry containing mineralized bubbles in the mechanical stirring chamber 13 flows out through the flow hole 311. The flotation equipment of the embodiment of the present invention improves the sealing of the mechanical stirring chamber 13 by arranging the cover plate 31 above the mineralization tank 1, and can prolong the time of reflection, rectification and surging of the slurry in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effects. In addition, the flow field disturbance formed by the rotation of the rotor 22 is blocked by the cover plate 31, so that the turbulence intensity in the lower side of the upper area 42 above the mechanical stirring chamber 13 can be low, which is conducive to the rise of the mineralized bubbles.

[0052] In other words, the turbulence of the slurry in the relatively closed and relatively small area of ​​the mineralization tank 1 with the cover plate 31 is more intense, the bubbles are smaller, and it is easier to capture fine particles. The slurry flows more smoothly at the lower side of the upper area 42 above the mechanical stirring chamber 13, the attached particles are more stable and not easy to fall off, and the mineralized bubbles rise smoothly, which improves efficiency.

[0053] In some embodiments, Figure 1 and Figure 2 As shown, the mineralization tank 1 includes a cylinder 14 and a tank bottom 15, and the tank bottom 15 is connected to the lower end of the cylinder 14. Since the peripheral wall surface of the mineralization tank 1 is a cylindrical structure, the turbulence in the horizontal direction of the slurry can be increased, so that the energy of the slurry flow is more concentrated and the utilization efficiency is higher. When fine-particle minerals can achieve the same mineralization effect, the energy dissipation can be lower, or the mineralization kinetic energy is more sufficient under the same energy condition, and it is easier to form tiny bubbles.

[0054] Alternatively, if Figure 2 As shown, the trough bottom 15 is a tapered shape that tapers from top to bottom. For example, the trough bottom 15 of the mineralization trough 1 is generally a segmented basin-shaped structure. The segmented basin-shaped trough bottom 15 can provide a vertical upward reflection force for the slurry thrown out by the impeller, which is more conducive to the floating of bubbles.

[0055] In other examples, the groove bottom 15 may be a concave spherical bottom. Figure 1 As shown, the groove bottom 15 may be a flat plate-shaped bottom. The embodiment of the present invention does not specifically limit the structure of the groove bottom 15.

[0056] In some embodiments, Figure 1 and Figure 4As shown, the rotor 22 is in the form of an impeller, and a plurality of turbulence reinforcement plates 16 are provided in the mechanical stirring chamber 13. The plurality of turbulence reinforcement plates 16 are arranged at intervals along the circumference of the mineralization tank 1 and surround the impeller. When the rotor 22 rotates, since the plurality of turbulence reinforcement plates 16 are arranged at intervals along the circumference of the mechanical stirring chamber 13, the slurry flowing along the circumference in the mechanical stirring chamber 13 is sequentially stopped and collided by the plurality of turbulence reinforcement plates 16, so as to improve the turbulence effect of the slurry in the mechanical stirring chamber 13, thereby improving the mineralization effect.

[0057] Alternatively, if Figure 3 As shown, the rotor 22 is in the form of an impeller, the outer diameter of the impeller is A, and the gap between the outer edge of the impeller and the inner edge of the turbulence enhancement plate 16 in the radial direction of the rotating shaft 21 is B, wherein 0.03A≤B≤0.2A. In other words, the gap between the impeller and the inner edge of the turbulence enhancement plate 16 is 3%-20% of the impeller diameter. For example, B is equal to 0.03A, 0.08A, 0.12A, 0.15A, 0.2A.

[0058] The inventors of the embodiments of the present invention have found through research and confirmed through experiments that when the impeller and the turbulence reinforcement plate 16 adopt the above-mentioned structural parameters, it is easier to generate tiny bubbles during slurry mineralization, and the circulation mixing effect is better, which is more conducive to the flotation of fine-grained minerals.

[0059] Alternatively, if Figure 8 As shown, the turbulence reinforcement plate 16 is provided with a second hollow hole 161 that penetrates along the thickness direction thereof. The turbulence reinforcement plate 16 of the internal and external nested combined mineralization flotation device of the embodiment of the present invention is designed as a hollow structure, and it is easier to generate tiny bubbles when the impeller rotates, so that the circulation and mixing effect of the slurry and the bubbles is better, which is more conducive to the mineralization of fine-grained minerals, and the resistance of the slurry flow is smaller, and the energy dissipation is less.

[0060] The opening size of the second hollow hole 161 can be designed according to the mineral properties, and the embodiment of the present invention is not limited to this. For example, the second hollow hole 161 can be a strip hole or a round hole. The strip hole can extend obliquely, horizontally, or vertically. There can be multiple second hollow holes 161, and the multiple second hollow holes 161 are discretely arranged.

[0061] In other examples, the turbulence enhancement plate 16 may also be a solid plate.

[0062] Alternatively, if Figure 1 and Figure 2As shown, the rotor 22 is in the form of an impeller, and a plurality of first baffles 17 are provided in the mechanical stirring chamber 13. The plurality of first baffles 17 are arranged at intervals along the circumference of the cylinder 14 and are higher than the impeller. In the horizontal projection of the mineralization tank 1, the first baffles 17 extend inwardly beyond the outer peripheral contour line of the impeller. It can be understood that the outer end of the first baffle 17 is connected to the outer wall of the cylinder 14 or the turbulence reinforcement plate 16, and the inner end of the first baffle 17 extends toward the center line of the rotating shaft 21 and extends to the top of the impeller. Therefore, when the impeller rotates, the first baffle 17 can stop the slurry flowing upward in the mechanical stirring chamber 13 and redirect it into the mechanical stirring chamber 13, thereby improving the turbulence effect of the primary mineralization and making the circulation and mixing effect of the slurry and bubbles better.

[0063] Alternatively, if Figure 1 and Figure 2 As shown, the rotor 22 is in the form of an impeller, and a plurality of second baffles 18 are provided in the mechanical stirring chamber 13. The plurality of second baffles 18 are arranged at intervals along the circumference of the tank bottom 15 and are lower than the impeller. In the horizontal projection of the mineralization tank 1, the second baffles 18 extend inwardly beyond the outer peripheral contour line of the impeller. It can be understood that the outer end of the second baffle 18 is connected to the outer wall of the cylinder 14 or the turbulence reinforcement plate 16, and the inner end of the second baffle 18 extends toward the center line of the rotating shaft 21 and extends to directly below the impeller. Therefore, when the impeller rotates, the second baffle 18 can stop the slurry flowing downward in the mechanical stirring chamber 13 and deflect the slurry upward, thereby improving the turbulence effect of the primary mineralization and making the circulation and mixing effect of the slurry and bubbles better.

[0064] Alternatively, if Figure 1 and Fig.11 As shown, a turbulence suppression grid 35 is provided in the tank body 4, and the turbulence suppression grid 35 is located in the column selection area 41 and adjacent to the upper area 42. It can be understood that the turbulence suppression grid 35 is provided at the upper side of the column selection area 41 to reduce the turbulence intensity in the upper area of ​​the column selection area 41 and improve the flotation effect and efficiency.

[0065] In other embodiments, the turbulence suppression grid 35 is located at a lower position in the upper region 42 to suppress the turbulence intensity in the upper region 42 and improve the flotation effect.

[0066] Optionally, the position of the turbulence suppression grid 35 in the up and down directions is adjustable, so that the flotation equipment can adjust the turbulence suppression grid 35 to a suitable position according to different flotation minerals or flotation effects, so as to expand the application range of the flotation equipment and achieve better turbulence suppression effect.

[0067] In other embodiments, Figure 7As shown, the impeller is located in the mechanical stirring chamber 13, and the impeller includes a wheel disc 222 and a plurality of blades 223. The wheel disc 222 is installed at the lower end of the rotating shaft 21, and the plurality of blades 223 are arranged at intervals along the circumference of the wheel disc 222 on the outer peripheral edge of the wheel disc 222. In the longitudinal section of the rotor 22, the contour line of the outer side surface of the blade 223 includes a vertical section 2234 and an arc section 2235. The upper end of the arc section 2235 is connected to the upper end of the vertical section 2234 and gradually extends inward, so that when the impeller rotates, the stirred pulp area turns upward along the arc section 2235. The flotation equipment of the embodiment of the present invention can improve the turbulence effect of the pulp in the mechanical stirring chamber 13 by setting the blades 223 as the above structure, enhance the capture effect of bubbles on the target minerals, enhance the intensity of the internal pulp circulation, and improve the energy utilization rate of the impeller rotation.

[0068] Alternatively, if Figure 7 As shown, the rotating shaft 21 has a gas supply channel 211 for supplying mineralizing gas to the mechanical stirring chamber 13, and the wheel disc 222 has a gas injection channel 2220 connected to the gas supply channel 211 in the rotating shaft 21, and the gas injection outlets of the gas injection channel 2220 are formed on the outer peripheral surface of the wheel disc 222 and arranged at intervals along the circumference of the wheel disc 222. Since the gas injection outlets of the gas injection channel 2220 in the wheel disc 222 are formed on the outer peripheral surface of the wheel disc 222 and arranged at intervals along the circumference of the wheel disc 222, the mixing degree of the slurry and the bubbles can be improved, and the mineralization effect of the mineralization component can be improved.

[0069] The wheel disc 222 has an air jet channel (not shown) in communication with the air supply channel 211 in the rotating shaft 21, and the air jet outlets of the air jet channel are formed on the outer peripheral surface of the wheel disc 222 and are arranged at intervals along the circumference of the wheel disc 222. The internal and external nested combined mineralization flotation equipment of the embodiment of the present invention can enhance the turbulence effect of the slurry in the mechanical stirring chamber 13 by setting the blades 223 as the above structure, enhance the capture effect of bubbles on the target minerals, enhance the intensity of the internal slurry circulation, and improve the energy utilization rate of the impeller rotation.

[0070] In addition, since the jet outlets of the jet channel in the wheel disc 222 are formed on the outer peripheral surface of the wheel disc 222 and are arranged at intervals along the circumference of the wheel disc 222, the mixing degree of the slurry and the bubbles can be improved, thereby improving the mineralization effect of the mineralization device.

[0071] In some embodiments, Figure 5 and Figure 6 As shown, the impeller includes a hub 221 , a wheel disc 222 , a top plate 224 , a bottom plate 225 and blades 223 , and the blades 223 include an upper blade 2231 and a lower blade 2232 .

[0072] The hub 221 is mounted at the lower end of the rotating shaft 21, and the wheel disc 222, the top plate 224 and the bottom plate 225 are mounted on the hub 221, and the wheel disc 222 is located between the top plate 224 and the bottom plate 225. There are multiple upper blades 2231 and multiple lower blades 2232, and the multiple upper blades 2231 are arranged between the upper surface of the wheel disc 222 and the top plate 224 and are arranged at intervals along the circumference of the wheel disc 222. Multiple lower blades 2232 are arranged between the lower surface of the wheel disc 222 and the wheel disc 222 and are arranged at intervals along the circumference of the wheel disc 222, and the upper blades 2231 and the lower blades 2232 correspond to each other one by one or are arranged alternately along the circumference of the wheel disc 222.

[0073] Preferably, the upper blades 2231 and the lower blades 2232 are arranged alternately, that is, the upper blades 2231 and the lower blades 2232 are not aligned with each other along the axial direction of the impeller.

[0074] When the impeller rotates, the upper blades 2231 on the upper side of the wheel disc 222 and the lower blades 2232 on the lower side of the wheel disc 222 can rotate simultaneously, which can enhance the slurry suction capacity of the impeller (the ability to suck the slurry from the slurry inlet 11 into the mechanical stirring chamber 13) on the one hand, and enhance the intensity of the internal slurry circulation, improve the mineralization effect of the slurry, and enhance the selectivity in the flotation process on the other hand.

[0075] For example, the upper blades 2231 and the lower blades 2232 are radially distributed, and the number of the upper blades 2231 and the lower blades 2232 are between 4 and 16 and are evenly arranged. It should be noted that the number of the upper blades 2231 and the lower blades 2232 can be equal or unequal, and the embodiment of the present invention is not limited to this.

[0076] Since the upper blades 2231 are arranged between the upper surface of the wheel disc 222 and the top plate 224, and the lower blades 2232 are arranged between the lower surface of the wheel disc 222 and the wheel disc 222, the intensity of the internal slurry circulation can be further enhanced, and the energy utilization rate of the impeller rotation is improved, which is beneficial to enhance the capture effect of bubbles on target minerals and enhance the selectivity in the flotation process.

[0077] For example, the outer circumference of the top plate 224 is substantially consistent with the size of the outer circumference formed by the plurality of upper blades 2231 , and the outer circumference of the bottom plate 225 is substantially consistent with the size of the outer circumference formed by the plurality of lower blades 2232 .

[0078] Alternatively, if Figure 7 As shown, the blade 223 is provided with a first hollow hole 2233 that passes through along the thickness direction thereof. The blade 223 of the mineralization device of the embodiment of the present invention is designed as a hollow structure so that it is easier to generate tiny bubbles when the impeller rotates, so that the circulation and mixing effect of the slurry and the bubbles is better, which is more conducive to the mineralization of fine-grained minerals.

[0079] For example, the first hollow hole 2233 may be a strip hole or a round hole. The strip hole may extend obliquely, horizontally, or vertically. There may be a plurality of first hollow holes 2233, and the plurality of first hollow holes 2233 may be discretely arranged.

[0080] In some embodiments, Figure 3 and Figure 4 As shown, in the longitudinal section of the mineralized groove 1, the peripheral wall of the mineralized groove 1 includes a plurality of line segments 19 connected in sequence, and the inclination angles of adjacent line segments 19 are different from each other.

[0081] During mineralization, the slurry is introduced into the mineralization tank 1 from bottom to top through the slurry inlet 11, and the rotor 22 rotates and stirs in the mechanical stirring chamber 13, thereby mineralizing the slurry to produce mineralized foam. Since in the longitudinal section of the mineralization tank 1, the peripheral wall of the mineralization tank 1 includes a plurality of line segments 19 connected in sequence, the slurry is reflected, rectified and surging by the inner wall of the mineralization tank 1. The mineralization effect is improved. Moreover, since the inclination angles of adjacent line segments 19 are different from each other, that is, the inclination angles of different parts of the peripheral wall of the mineralization tank 1 are different, the angles of the slurry reflected by different peripheral wall parts are different. Compared with the arc-shaped peripheral wall, the slurry flows reflected by the peripheral wall parts with different inclination angles collide with each other in the mineralization tank 1. This enhances the turbulence generated by the mineralization tank 1, reduces the weak mineralization area, and further increases the probability of bubble generation and attachment to particles, thereby improving the mineralization effect and reducing the local wear of the mineralization tank 1.

[0082] For example, the cross-sectional area of ​​the mechanical stirring chamber 13 gradually decreases from top to bottom, and the mineralization tank 1 may have a generally segmented basin-shaped structure. The segmented basin-shaped mechanical stirring chamber 13 may provide reflection forces in multiple directions for the slurry and bubbles stirred by the rotor 22, thereby strengthening the collision effect of the slurry flow, increasing the turbulence intensity, and improving the mineralization effect.

[0083] Compared with the parabolic or arc-shaped mineralization trough 1 in the related art, the mineralization trough 1 of the mineralization device in the embodiment of the present invention is easier to process and obtain multiple reflection focuses. In other words, the mineralization trough 1 in the embodiment of the present invention is easier to achieve multiple reflection focuses close to the theoretical design, which improves the actual application effect. For mineralization troughs 1 of different sizes, by adjusting the number and inclination of the line segments 19 in the longitudinal section of the mineralization trough 1, a solution close to the theoretical focus can still be obtained, and it is easier to realize the theoretical flow field model, that is, folding and surging in multiple directions along the inner wall of the mineralization trough 1, thereby forming a strong turbulent flow field. The mineralization trough 1 in the embodiment of the present invention can strengthen the overall mineralization and reduce the weak mineralization area in the mechanical stirring chamber 13, reducing the situation of local excessive wear of the mineralization trough 1.

[0084] For example, for coarser mineral particles, the distance between the upper edge of the mineralization tank 1 and the inner bottom wall (i.e., the depth of the mineralization tank 1) can be adjusted to allow the particles to participate in circulation and mixed mineralization multiple times, reduce the falling of coarse particles, and avoid the slurry sinking to the bottom and clogging the pipeline.

[0085] The angle of the edge of the slurry outlet 12 of the mineralization tank 1 of the embodiment of the present invention can be adaptively adjusted to avoid the slurry rushing out of the mineralization tank 1 due to an excessively large angle, which is beneficial to improving the mineralization efficiency and effect of the mineralization tank 11.

[0086] Alternatively, if Figure 3 As shown, the inclination angle between the line segment 19 and the horizontal plane is α, where 10°≤α<90°. For example, the inclination angle α between the line segment 19 and the horizontal plane can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°. Alternatively, the inclination angle α can be close to and less than 90°. The inventors of the embodiments of the present invention have found through research and verified through experiments that when the inclination angle α between the line segment 19 and the horizontal plane is within the above-mentioned angle range, the mineral material can be better involved in circulation and mixed mineralization, the turbulence effect generated in the mineralization tank 1 can be enhanced, and the slurry can be prevented from rushing out of the mineralization tank 1 along the side wall of the mineralization tank 1, which is beneficial to improving the mineralization efficiency and effect of the mineralization tank 1.

[0087] Optionally, the number of line segments 19 is proportional to the area of ​​the slurry outlet 12. It is understandable that when the area of ​​the slurry outlet 12 is larger, the number of line segments 19 can be greater, thereby improving the reflection and rectification effect of the mineralization tank 1, thereby forming a strong turbulent flow field. When designing the mineralization tank 1, the structure of the mineralization tank 1 can be adjusted as the mineralization tank 1 increases and the mineral type changes, so as to meet the mineralization requirements of the mineralization device and improve the mineralization effect.

[0088] In some embodiments, Figure 3 As shown, the flotation device further includes a feed box 33, which is arranged below the mineralization tank 1. The feed box 33 has a feed port suitable for connecting with the feed pipe 32 for supplying slurry into the feed box 33 and a discharge port connected with the slurry inlet 11 to supply the slurry in the feed box 33 to the mechanical stirring chamber 13. The feed box 33 is made separately from the mineralization tank 1 or made integrally. It can be understood that the feed pipe 32 first supplies the slurry into the feed box 33, and then the slurry enters the mineralization tank 1 through the feed box 33. The flotation device of the embodiment of the present invention can buffer the slurry before it enters the mineralization tank 1 by arranging the feed box 33 below the mineralization tank 1, so that the slurry can quickly enter the flow field stirred by the impeller, which is conducive to improving the turbulence effect of the slurry in the mechanical stirring chamber 13, enhancing the capture effect of bubbles on the target minerals, and enhancing the intensity of the internal slurry circulation.

[0089] In some embodiments, Figure 3 and Fig.10 As shown, the flotation device also includes an anti-settling component 34, which includes at least one of a rake frame 341 and a spray gun 342, wherein the rake frame 341 is arranged at the bottom of the mechanical stirring chamber 13 and is located below the rotor 22, and the rake frame 341 is driven to rotate by the rotating shaft 21; the spray end of the spray gun 342 extends into the bottom of the mechanical stirring chamber 13, and is used to spray water and / or gas to the bottom of the mechanical stirring chamber 13.

[0090] It is understood that when the anti-settling component 34 is a rake 341, the rake 341 is arranged at the bottom of the mechanical stirring chamber 13 and below the rotor 22, and the rake 341 can be driven to rotate by the rotating shaft 21. When the anti-settling component 34 is a spray gun 342, the spray end of the spray gun 342 extends into the bottom of the mechanical stirring chamber 13, and is used to spray water and / or gas to the bottom of the mechanical stirring chamber 13. The rake 341 and the spray gun 342 can prevent the problem of particles not attached to the bubbles from being deposited and blocked in the mechanical stirring chamber 13, which is conducive to improving the mineralization effect of the slurry. Preferably, the spray gun 342 sprays air.

[0091] In some embodiments, Fig. 9 As shown, the flotation device further includes a froth scraping device 6, which includes a rotatable scraper 61, which is arranged in the tank body 4 and in the froth area of ​​the upper part of the upper area 42. The scraper 61 is arc-shaped or involute-shaped, and the angle between the scraper 61 and the vertical plane is 0-30 degrees. It can be understood that the rotation axis of the scraper 61 is colinear with the axis of the tank body 4. When the scraper 61 rotates, the mineralized froth in the froth area can be scraped to collect and discharge the mineralized froth.

[0092] Since the scraper 61 is in an arc or involute shape, the extension path of the scraper 61 can be extended, the resistance of the scraper 61 during movement can be reduced, and the energy consumption of the scraper 61 during movement can be reduced. In addition, since the angle between the scraper 61 and the vertical plane can be 0-30 degrees, for example, the angle between the scraper 61 and the vertical plane is 1 degree, 10 degrees, 15 degrees, 20 degrees, 25 degrees, and 30 degrees. Thus, the scraper 61 can scrape the foam quickly, and the scraper 61 can scrape a thicker foam layer, which is conducive to improving the scraping efficiency of the scraper 61.

[0093] Optionally, the scrapers 61 are at least two layers and are arranged at intervals in the up-down direction, each layer has a plurality of scrapers 61, and the plurality of scrapers 61 in each layer are arranged at intervals along the circumference of the tank body 4. The flotation device of the embodiment of the present invention can improve the sorting effect of mineralized bubbles and improve the scraping efficiency of the scrapers 61 by providing at least two layers of scrapers 61.

[0094] For two adjacent layers of scrapers 61, the number of scrapers 61 in the upper layer can be greater than the number of scrapers 61 in the lower layer. It can be understood that the multiple scrapers 61 in the upper layer are arranged more densely, and the multiple scrapers 61 in the lower layer are arranged more sparsely. The sparse scrapers 61 in the lower layer can sort the mineralized foam in the upper area 42, and the dense scrapers 61 in the upper layer can increase the scraping amount of the mineralized foam when rotating, so as to scrape a thicker foam layer, which is conducive to improving the scraping efficiency of the scrapers 61.

[0095] Optionally, the axial position of the scraper 61 along the tank body 4 is adjustable so that the scraping layer of the scraper 61 is adapted to the ore grade, thereby improving the compatibility and applicability of the flotation device and expanding the application range of the flotation device. For example, the scraper 61 can be installed on the rotating shaft 21 in a clamping structure, and the position of the scraper 61 along the rotating shaft 21 is adjustable.

[0096] Optionally, the scraper 61 is provided with a third hollow hole (not shown) penetrating along the thickness direction thereof, that is, the hollow structure can make the scraper 61 scrape bubbles more smoothly.

[0097] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0101] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0102] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An internal and external nested combined mineralization flotation equipment, characterized in that: include: Tank body; A mineralization device, the mineralization device comprising a rotor assembly and a mineralization tank, the mineralization tank being located in the tank body and arranged on the bottom wall of the tank body, the mineralization tank having a mechanical stirring chamber for mechanically stirring the slurry, the mineralization tank being provided with a slurry inlet for supplying the slurry into the mechanical stirring chamber, the top of the mineralization tank being provided with a slurry outlet for discharging the slurry, the area between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the tank body constituting a column selection area, the rotor assembly comprising a rotating shaft and a rotor, the lower end of the rotating shaft extending into the mechanical stirring chamber, the rotor being mounted at the lower end of the rotating shaft and being located in the mechanical stirring chamber, the rotating shaft being provided with a gas supply channel for supplying gas into the mechanical stirring chamber; an aeration device, the aeration device being in communication with the column selection area and being used for charging gas into the column selection area so as to column select the ore pulp entering the column selection area from the mechanical stirring chamber in the column selection area; A driving device is arranged above the trough body and connected to the rotating shaft to drive the rotating shaft and the rotor to rotate.

2. The internal and external nested combined mineralization flotation equipment according to claim 1 is characterized in that: The mineralization tank comprises a cylinder and a tank bottom, and the tank bottom is connected to the lower end of the cylinder.

3. The internal and external nested combined mineralization flotation equipment according to claim 2 is characterized in that: A plurality of turbulence reinforcement plates are arranged in the mechanical stirring chamber, and the plurality of turbulence reinforcement plates are arranged at intervals along the circumference of the mineralization tank and surround the rotor.

4. The internal and external nested combined mineralization flotation equipment according to claim 3 is characterized in that: A plurality of first baffles are arranged in the mechanical stirring chamber, and the plurality of first baffles are arranged at intervals along the circumference of the cylinder and are higher than the rotor. In the horizontal projection of the mineralization tank, the first baffles extend inwardly beyond the outer contour line of the rotor.

5. The internal and external nested combined mineralization flotation equipment according to claim 3 is characterized in that: A plurality of second baffles are provided in the mechanical stirring chamber, and the plurality of second baffles are arranged at intervals along the circumference of the trough bottom and are lower than the rotor. In the horizontal projection of the mineralization trough, the second baffles extend inwardly beyond the outer peripheral contour line of the rotor.

6. The internal and external nested combined mineralization flotation equipment according to claim 3 is characterized in that: The rotor is an impeller, the outer diameter of the impeller is A, and the gap between the outer edge of the impeller and the inner edge of the turbulence reinforcement plate in the radial direction of the rotating shaft is B, wherein 0.03A≤B≤0.2A.

7. The internal and external nested combined mineralization flotation equipment according to claim 1, characterized in that: The tank body is provided with an upper area located above the mineralization tank, and the tank body is provided with a turbulence suppression grid, which is located in the column selection area and adjacent to the upper area and / or the turbulence suppression grid is located in the lower part of the upper area.

8. The internal and external nested combined mineralization flotation equipment according to claim 1, characterized in that: The tank body is provided with an upper area located above the mineralization tank, and the tank body is provided with a turbulence suppression grid located in the upper area and / or the column selection area, and the position of the turbulence suppression grid in the up and down directions is adjustable.

9. The internal and external nested combined mineralization flotation equipment according to any one of claims 1 to 8, characterized in that: The rotor is an impeller, which is located in the mechanical stirring chamber. The impeller includes a wheel disc and a plurality of blades. The wheel disc is installed at the lower end of the rotating shaft. The plurality of blades are arranged at intervals along the circumference of the wheel disc on the outer peripheral edge of the wheel disc. In the longitudinal section of the impeller, the contour line of the outer side surface of the blade includes a vertical segment and an arc segment. The arc segment is arranged at the upper segment of the vertical segment and gradually extends inward.

10. The internal and external nested combined mineralization flotation equipment according to claim 9, characterized in that: The wheel disc has an air jet channel in communication with the air supply channel in the rotating shaft. Air jet outlets of the air jet channel are formed on the outer peripheral surface of the wheel disc and are arranged at intervals along the circumference of the wheel disc.

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