Internal and external nested combined mineralization flotation equipment

Abstract

The utility model 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 inside and outside 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 utility model relates to the technical field of flotation, specifically, to an inner-outer nested combined mineralization flotation device. BACKGROUND

[0002] Flotation is a widely used mineral processing method, and generally includes mechanical agitation type flotation and air agitation type flotation. The mechanical agitation type flotation machine is commonly referred to as a flotation machine, and the air agitation type flotation machine is commonly referred to as a flotation column. Related technologies propose a combination of mechanical agitation type flotation machines and air agitation type flotation columns to improve the flotation effect. However, the combined flotation machine in the related technology has the problems of unreasonable structure design, large height, poor safety, and poor flotation effect. SUMMARY

[0003] The utility model aims to at least solve one of the technical problems in the related art to some extent.

[0004] To this end, an embodiment of the utility model provides an inner-outer nested combined mineralization flotation device. The inner-outer nested combined mineralization flotation device has a reasonable structure design, a reduced axial size, and improved flotation effect.

[0005] The inner-outer nested combined mineralization flotation device includes a tank body, a mineralization device, and an air charging device. The mineralization device includes a rotor assembly and a mineralization tank. The mineralization tank is located in the tank body and is arranged on the bottom wall of the tank body. The mineralization tank has a mechanical agitation cavity for mechanically agitating the ore pulp. The mineralization tank is provided with an ore pulp inlet for supplying ore pulp into the mechanical agitation cavity. The top of the mineralization tank is provided with an ore pulp outlet for discharging ore pulp. 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. The rotor assembly includes a shaft and a rotor. The lower end of the shaft extends into the mechanical agitation cavity. The rotor is mounted on the lower end of the shaft and located in the mechanical agitation cavity. The shaft is provided with a gas supply channel for supplying gas into the mechanical agitation cavity. The air charging device is in communication with the column selection area and is used to charge gas into the column selection area to perform column selection on the ore pulp entering the column selection area from the mechanical agitation cavity. A driving device is arranged above the tank body and connected with the shaft to drive the shaft and the rotor to rotate.

[0006] According to the embodiment of the utility model, when mineralization is carried out, the slurry is passed into the mineralization tank through the slurry inlet along the direction from bottom to top, the rotor rotates and stirs in the mechanical stirring cavity, air is dispersed to form tiny bubbles, target particles adhere to the bubbles to form mineralized bubbles, the slurry containing the mineralized bubbles and the particles not adhered to the bubbles can flow out of the slurry outlet of the mineralization tank, and the mineralized bubbles flow upwards. 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, therefore the slurry containing other particles not adhered to the bubbles can directly enter the column selection area after flowing out of the slurry outlet of the mineralization tank, the particles not adhered to the bubbles can be column selected in the column selection area under the action of the gas supplied by the aeration device, and the mineralized bubbles generated after column selection flow upwards. The flotation device of the embodiment of the utility model adopts the structure of inner-outer nested combination, the axial dimension of the flotation device can be reduced, the problem of upward and downward convection of the particles not adhered to the bubbles after mechanical stirring and the mineralized bubbles after column selection can be reduced, and the flotation effect and the flotation efficiency are improved.

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

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

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

[0010] In some embodiments, a plurality of second baffles are arranged in the mechanical stirring cavity, the plurality of second baffles are arranged along the circumference of the tank bottom and are lower than the rotor, and in the horizontal projection of the mineralization tank, the second baffles extend inward beyond the outer peripheral contour line of the rotor.

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

[0012] In some embodiments, an upper area above the mineralization tank is arranged in the tank body, a turbulence suppression grid is arranged in the tank body, the turbulence suppression grid is located in the column selection area and is 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 is provided with an upper region above the mineralization tank, and a turbulence suppression grid is arranged in the upper region and / or the column selection region, and the position of the turbulence suppression grid in the vertical direction is adjustable.

[0014] In some embodiments, the rotor is an impeller, which is arranged in the mechanical stirring cavity, and the impeller comprises a disc and a plurality of blades, the disc is arranged at the lower end of the rotating shaft, the plurality of blades are arranged along the circumferential direction of the disc and are arranged at the outer circumferential surface of the disc, and in the longitudinal section of the impeller, the profile line of the outer side surface of the blade comprises 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 disc is provided with a gas injection channel which is in communication with the gas supply channel in the rotating shaft, and the gas injection outlet of the gas injection channel is formed on the outer circumferential surface of the disc and is arranged along the circumferential direction of the disc. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present application.

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

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

[0019] Figure 4 is a partial sectional view of the mineralization device of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present application.

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

[0021] Figure 6 is a partial sectional view of the rotor of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present application.

[0022] Figure 7 is a schematic view of the rotor of the inner-outer nested combined mineralization flotation equipment according to another embodiment of the present application.

[0023] Figure 8 is a schematic view of the turbulence enhancement plate of the inner-outer nested combined mineralization flotation equipment according to an embodiment of the present application.

[0024] Figure 9is a top view schematic diagram of the trough body and the bubble scraping device of the inner-outer nested combined mineralization flotation equipment according to the embodiment of the utility model.

[0025] Figure 10 is a schematic diagram of the rake frame of the inner-outer nested combined mineralization flotation equipment according to the embodiment of the utility model.

[0026] Figure 11 is a top view schematic diagram of the turbulence suppression grid of the inner-outer nested combined mineralization flotation equipment according to the embodiment of the utility model.

[0027] Reference signs:

[0028] 1, mineralization tank; 11, pulp inlet; 12, pulp outlet; 13, mechanical stirring cavity; 14, cylinder; 15, tank bottom; 16, turbulence enhancement 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, air jet channel; 223, blade; 2231, upper blade; 2232, lower blade; 2233, first hollow hole; 2234, vertical segment; 2235, arc segment; 224, top plate; 225, bottom plate;

[0030] 31, cover plate; 311, flow-through 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, air charging device;

[0033] 6, bubble scraping device; 61, scraper. DETAILED DESCRIPTION

[0034] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0035] The drawings are referred to below Figures 1 to 11 The inner-outer nested combined mineralization flotation equipment according to the embodiments of the utility model is described below.

[0036] As Figures 1 to 4As shown, the inner and outer nested combined mineralization flotation device of the embodiment of the utility model includes: tank body 4, mineralization device, aeration device 5 and 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 the 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 cavity 13 for mechanically stirring the ore pulp in it, the bottom of the mineralization tank 1 is provided with an ore pulp inlet 11 for feeding the ore pulp into the mechanical stirring cavity 13, and the top of the mineralization tank 1 is provided with an ore pulp outlet 12 for discharging the ore pulp. It can be understood that the ore pulp coming out of the mechanical stirring cavity 13 includes target particles attached to air bubbles and other particles (target particles not attached to air 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 cavity 13, the rotor 22 is installed on the lower end of the rotating shaft 21 and located in the mechanical stirring cavity 13, and the rotating shaft 21 is provided with a gas supply channel 211 for supplying gas into the mechanical stirring cavity 13. That is, the target particles in the ore pulp and the air supplied into the mechanical stirring cavity 13 are mechanically stirred by the rotor assembly 2, the target particles are attached to the air bubbles to form mineralized air bubbles, so as to realize mechanical stirring flotation.

[0039] The aeration device 5 communicates with the column selection area 41 and is used for filling gas into the column selection area 41 to perform column selection on the ore pulp entering the column selection area 41 from the mechanical stirring cavity 13 in the column selection area 41. The driving device is arranged above the tank body 4 and connected with the rotating shaft 21 to drive the rotating shaft 21 and the rotor 22 to rotate.

[0040] According to the embodiment of the utility model, when mineralization is carried out, the slurry is passed into the mineralization tank 1 along the direction from bottom to top through the slurry inlet 11, the rotor 22 rotates and stirs in the mechanical stirring chamber 13, air is dispersed to form tiny bubbles, target particles adhere to the bubbles to form mineralized bubbles, the slurry containing the mineralized bubbles and the particles not adhered to the bubbles can flow out of the slurry outlet 12 of the mineralization tank 1, and the mineralized bubbles flow upwards. The area between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4 constitutes the column selection area 41 surrounding the mineralization tank 1, therefore the slurry containing other particles not adhered to the bubbles can directly enter into the column selection area 41 after flowing out of the slurry outlet 12 of the mineralization tank 1, and the particles not adhered to the bubbles can be column selected in the column selection area 41 under the action of the gas supplied by the gas supply device 5, and the mineralized bubbles generated after column selection flow upwards. The flotation device of the embodiment of the utility model adopts the structure of internal and external nested combination, which can reduce the axial size of the flotation device, reduce the problem of upward and downward convection of the particles not adhered to the bubbles after mechanical stirring and the mineralized bubbles after column selection, and is beneficial to improving the flotation effect and the flotation efficiency.

[0041] Specifically, the tank body 4 is provided with an upper area 42, and the upper area 42 is arranged above the mineralization tank 1. The mineralized bubbles generated after mechanical stirring and the mineralized bubbles generated after column selection both flow upwards to the upper area 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-down direction of the tank body 4, the flow direction of the slurry after mechanical stirring into the column selection area 41 is opposite to the direction of the mineralized bubbles after column selection from the column selection area 41 into the upper area 42, which affects the mineralization and flotation effect.

[0043] The internal and external nested combination type mineralization flotation device of the embodiment of the utility model constitutes the column selection area 41 surrounding the mineralization tank 1 between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4, which can make the column selection and mineralization process mainly carried out between the mineralization tank 1 and the inner wall of the tank body 4, is beneficial to reducing the overall height of the device, and reducing the adverse effect of the upward and downward convection of the particles not adhered to the bubbles after mechanical stirring and the mineralized bubbles after 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 (the mineralized bubbles can be called mineralized foam after aggregation, and in the following description, the mineralized bubbles and the mineralized foam can be used interchangeably) and other particles not adhered to the bubbles, the mineralized bubbles are target particles adhered to the bubbles, here, the target particles adhered to the bubbles can also be called mineralized particles, and the other particles can include target particles not adhered to the bubbles, non-target mineral particles not adhered to the bubbles and tailing particles.

[0045] For example, the bottom of the groove 4 is provided with a discharge port, and other particles that are not attached to the bubbles after column selection fall into the bottom of the groove 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 belt pulley assembly, that is, the driving motor drives the belt pulley assembly to rotate, and the belt pulley assembly drives the rotating shaft 21 to rotate synchronously.

[0046] In the related art, mineralization is carried out in a mineralization tank of a flotation device, and ore pulp is supplied from the outside into the mineralization tank, and mineralization is carried out under the action of air supply and mechanical stirring in the ore pulp. However, the inventors have found that, due to the large space in the mineralization tank, the mineralization and flotation effect is poor and the flotation efficiency is not high. Therefore, in the related art, a parabolic-shaped basin-shaped reflection bottom is provided in the mineralization tank, and ore pulp and gas are supplied into the reflection bottom, and mechanical stirring is carried out in the reflection bottom to realize bubble mineralization, and the reflection bottom reflects the ore pulp containing mineralized bubbles out of the reflection bottom to improve the flotation efficiency. However, the inventors have found that there is still a problem of poor mineralization and flotation effect and low efficiency. The inventors have found through research that, compared with mineralization in the mineralization tank, the reflection action of the reflection bottom can improve the flotation efficiency to a certain extent, but due to the open top of the reflection bottom, the stirred ore pulp is quickly discharged from the reflection bottom under the reflection action 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 effect and improve the flotation efficiency, the inventors propose a limited mineralization scheme. The so-called limited mineralization refers to mineralization in a relatively closed and relatively small limited space compared with the related art. The limited space can also be referred to as a limited space, a limited area, a limited area, or a limited area, simply referred to as a limited area. For example, the limited area is smaller and relatively closed compared with the inner cavity of the mineralization tank in the related art, and is relatively closed compared with the open parabolic-shaped reflection bottom in the related art. During the mineralization process, the ore pulp and the gas are supplied into the limited space, and mechanical stirring is carried out in the limited space, so that more air bubbles can be formed, the air bubbles and the target particles in the ore pulp are repeatedly reflected, stirred and collided in the limited space, the contact time, the contact frequency and the collision frequency of the air bubbles and the target particles are improved, the mineralization and flotation effect is improved, and the efficiency is further improved. Therefore, in the utility model, the mineralization carried out in the limited space can be referred to as limited mineralization.

[0048] Specifically, as Figure 1 and Figure 2As shown, the mineralization device further comprises a cover plate 31 arranged above the mineralization tank 1, wherein the cover plate 31 is opposite to the pulp outlet 12 and spaced apart from the top surface of the mineralization tank 1 so as to allow the mineralized pulp to flow out. It can be understood that the cover plate 31 and the mineralization tank 1 define a confined mineralization area including the mechanical stirring cavity 13. The flotation device of the embodiment of the present application improves the sealing performance of the mechanical stirring cavity 13 by arranging the cover plate 31 above the mineralization tank 1, which can prolong the time for the pulp to reflect, rectify and surge in the mechanical stirring cavity 13, so as to increase the contact time, contact frequency and collision frequency of the bubbles and target particles, thereby improving the mineralization and flotation effect. Moreover, 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 cavity 13 lower, which is beneficial to the upward movement of the mineralized bubbles.

[0049] In other words, the turbulence of the pulp in the relatively closed and relatively small area of the mineralization tank 1 with the cover plate 31 is more intense, and the bubbles are smaller and more likely to capture fine particles. The mineralized bubbles flow more smoothly at the lower side of the upper area 42 above the mechanical stirring cavity 13, and the attached particles are more stable and less likely to fall off.

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

[0051] In other examples, as shown in FIG. 4, Figure 3 As shown, the cover plate 31 covers the pulp outlet 12 and is provided with a flow hole 311 for communicating the mechanical stirring cavity 13 and the outside of the mechanical stirring cavity 13. It can be understood that the mineralized pulp containing mineralized bubbles in the mechanical stirring cavity 13 flows out through the flow hole 311. The flotation device of the embodiment of the present application improves the sealing performance of the mechanical stirring cavity 13 by arranging the cover plate 31 above the mineralization tank 1, which can prolong the time for the pulp to reflect, rectify and surge in the mechanical stirring cavity 13, so as to increase the contact time, contact and collision frequency of the bubbles and target particles, thereby improving the mineralization and flotation effect. Moreover, 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 cavity 13 lower, which is beneficial to the upward movement of the mineralized bubbles.

[0052] In other words, the turbulence of the pulp in the relatively closed and relatively small area of the mineralization tank 1 with the cover plate 31 is more intense, and the bubbles are smaller and more likely to capture fine particles. The mineralized bubbles flow more smoothly at the lower side of the upper area 42 above the mechanical stirring cavity 13, and the attached particles are more stable and less likely to fall off, the mineralized bubbles rise smoothly, and the efficiency is improved.

[0053] In some embodiments, as shown in FIG. 5, Figure 1 and Figure 2As shown in the figure, the mineralization tank 1 comprises a cylinder 14 and a tank bottom 15 connected with the lower end of the cylinder 14. Since the peripheral wall surface of the mineralization tank 1 is in a cylindrical structure, the horizontal direction turbulence of the ore pulp can be increased, so that the energy of the ore pulp flow is more concentrated and the utilization efficiency is higher. In the case that the same mineralization effect can be achieved for the micro-fine particle minerals, the energy dissipation is lower, or in the case of the same energy, the mineralization kinetic energy is sufficient, and it is easier to form micro-bubbles.

[0054] Optionally, as shown in the figure, Figure 2 As shown in the figure, the tank bottom 15 is tapered along the direction from top to bottom. For example, the tank bottom 15 of the mineralization tank 1 is generally in a segmented basin structure. The segmented basin tank bottom 15 can provide a vertical upward reflection force for the ore pulp thrown out by the impeller, which is more conducive to the floating of the bubbles.

[0055] In other examples, the tank bottom 15 can be a concave spherical bottom. Alternatively, as shown in the figure, Figure 1 The tank bottom 15 can be a flat bottom. The embodiments of the present application do not make specific limitations on the structure of the tank bottom 15.

[0056] In some embodiments, as shown in the figures, Figure 1 and Figure 4 The rotor 22 is in the form of an impeller, and a plurality of turbulence enhancement plates 16 are arranged in the mechanical stirring cavity 13 and surround the impeller along the circumferential direction of the mineralization tank 1. When the rotor 22 rotates, since the plurality of turbulence enhancement plates 16 are arranged along the circumferential direction of the mechanical stirring cavity 13, the ore pulp flowing along the circumferential direction in the mechanical stirring cavity 13 is sequentially stopped and collided by the plurality of turbulence enhancement plates 16, so as to improve the turbulence effect of the ore pulp in the mechanical stirring cavity 13, thereby improving the mineralization effect.

[0057] Optionally, as shown in the figure, Figure 3 The rotor 22 is in the form of an impeller, and the outer diameter of the impeller is A, and the gap between the outer side of the impeller and the inner side of the turbulence enhancement plate 16 along 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 side of the turbulence enhancement plate 16 is 3%-20% of the diameter of the impeller. For example, B is equal to 0.03A, 0.08A, 0.12A, 0.15A, or 0.2A.

[0058] The inventors of the embodiments of the present application have found through research and experiments that when the impeller and the turbulence enhancement plate 16 adopt the above structural parameters, it is easier to produce micro-bubbles during the mineralization of the ore pulp, and the circulation mixing effect is better, which is more conducive to the flotation of the micro-fine particle minerals.

[0059] Optionally, as shown in the figure, Figure 8As shown, the turbulence intensifier plate 16 is provided with a second hollow hole 161 penetrating along the thickness direction thereof. The turbulence intensifier plate 16 of the inner-outer nested combination type mineralization flotation device according to the embodiment of the present application is designed as a hollow structure, and the impeller is more likely to generate tiny bubbles when rotating, so that the circulating mixing effect of the ore pulp and the bubbles is better, and the mineralization of the fine-grained minerals is more favorable, and the resistance of the ore pulp 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 application does not limit this. For example, the second hollow hole 161 can be a strip hole or a circular hole. The strip hole can extend obliquely, horizontally or vertically. The second hollow hole 161 can be multiple, and the multiple second hollow holes 161 are arranged discretely.

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

[0062] Optionally, as shown in Figure 1 and Figure 2 The rotor 22 is in the form of an impeller, and a plurality of first baffles 17 are arranged in the mechanical stirring cavity 13 and are higher than the impeller and are arranged along the circumference of the cylinder 14. 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 intensifier plate 16, and the inner end of the first baffle 17 extends toward the center line of the rotating shaft 21 and extends directly above the impeller. Therefore, when the impeller rotates, the first baffle 17 can stop the upward flowing ore pulp in the mechanical stirring cavity 13 and re-flow into the mechanical stirring cavity 13, thereby improving the turbulence effect of the primary mineralization and making the circulating mixing effect of the ore pulp and the bubbles better.

[0063] Optionally, as shown in Figure 1 and Figure 2 The rotor 22 is in the form of an impeller, and a plurality of second baffles 18 are arranged in the mechanical stirring cavity 13 and are lower than the impeller and are arranged along the circumference of the tank bottom 15. 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 intensifier plate 16, and the inner end of the second baffle 18 extends toward the center line of the rotating shaft 21 and extends directly below the impeller. Therefore, when the impeller rotates, the second baffle 18 can stop the downward flowing ore pulp in the mechanical stirring cavity 13 and re-flow upward, thereby improving the turbulence effect of the primary mineralization and making the circulating mixing effect of the ore pulp and the bubbles better.

[0064] Optionally, as shown in Figure 1 and Figure 11As shown, the slot body 4 is provided with a turbulence suppression grid 35, which 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 arranged at the upper side of the column selection area 41 to reduce the turbulence intensity of the upper area of the column selection area 41, thereby improving the flotation effect and efficiency.

[0065] In other embodiments, the turbulence suppression grid 35 is located in the lower side of the upper area 42 to suppress the turbulence intensity in the upper area 42, thereby improving the flotation effect.

[0066] Optionally, the position of the turbulence suppression grid 35 in the up-down direction is adjustable, thereby the flotation device can adjust the turbulence suppression grid 35 to the appropriate position according to different flotation minerals or flotation effects, so as to expand the application range of the flotation device and improve the turbulence suppression effect.

[0067] In other embodiments, as shown in the accompanying drawings, Figure 7 The impeller is located in the mechanical stirring cavity 13, and the impeller includes a disc 222 and a plurality of blades 223. The disc 222 is installed at the lower end of the rotating shaft 21, and the plurality of blades 223 are arranged along the outer periphery of the disc 222. In the longitudinal section of the rotor 22, the profile line of the outer side surface of the blade 223 includes a vertical segment 2234 and an arc segment 2235. The upper end of the arc segment 2235 is connected to the upper end of the vertical segment 2234 and gradually extends inward, so that when the impeller rotates, the stirred slurry area is turned upward along the arc segment 2235. The flotation device of the embodiment of the present application can improve the turbulence effect of the reinforced slurry in the mechanical stirring cavity 13, enhance the capturing effect of the bubbles on the target minerals, enhance the intensity of the internal slurry circulation, and improve the energy utilization rate of the impeller rotation.

[0068] Optionally, as shown in the accompanying drawings, Figure 7 The rotating shaft 21 has a gas supply passage 211 for supplying mineralized gas into the mechanical stirring cavity 13, and the disc 222 has a gas injection passage 2220 that communicates with the gas supply passage 211 in the rotating shaft 21. The gas injection outlet of the gas injection passage 2220 is formed on the outer peripheral surface of the disc 222 and is arranged along the circumference of the disc 222. Since the gas injection outlet of the gas injection passage 2220 in the disc 222 is formed on the outer peripheral surface of the disc 222 and is arranged along the circumference of the disc 222, the mixing degree of the slurry and the bubbles can be improved, and the mineralization effect of the mineralization assembly can be improved.

[0069] The impeller 222 has an air jet channel (not shown) that communicates with the air supply channel 211 in the rotating shaft 21. The air jet outlets of the air jet channel are formed on the outer circumferential surface of the impeller 222 and are arranged at intervals along the circumference of the impeller 222. The nested combined mineral flotation device of this utility model, by setting the blades 223 to the above-described structure, can improve the turbulence effect of the slurry in the mechanical stirring chamber 13, enhance the capture effect of bubbles on target minerals, enhance the intensity of internal slurry circulation, and improve the energy utilization rate of impeller rotation.

[0070] In addition, since the jet outlets of the jet channels inside the disc 222 are formed on the outer circumferential surface of the disc 222 and are arranged at intervals along the circumference of the 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, such as Figure 5 and Figure 6 As shown, the impeller includes a hub 221, a disc 222, a top plate 224, a bottom plate 225, and blades 223. The blades 223 include an upper blade 2231 and a lower blade 2232.

[0072] A hub 221 is mounted on the lower end of a rotating shaft 21. A disc 222, a top plate 224, and a bottom plate 225 are mounted on the hub 221, with the disc 222 located between the top plate 224 and the bottom plate 225. Multiple upper blades 2231 and multiple lower blades 2232 are arranged between the upper surface of the disc 222 and the top plate 224, and are spaced apart circumferentially along the disc 222. Multiple lower blades 2232 are arranged between the lower surface of the disc 222 and the disc 222, and are spaced apart circumferentially along the disc 222. The upper blades 2231 and lower blades 2232 are either one-to-one corresponding or staggered circumferentially along the disc 222.

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

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

[0075] For example, the upper blade 2231 and the lower blade 2232 are arranged radially, with the number of upper blade 2231 and lower blade 2232 ranging from 4 to 16, and are evenly distributed. It should be noted that the number of upper blade 2231 and lower blade 2232 may be equal or unequal, and the embodiments of this utility model do not limit 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 strength of the internal pulp circulation can be further enhanced, the energy utilization rate of the impeller rotation is improved, the capturing effect of the bubbles on the target minerals is enhanced, and the selectivity in the flotation process is enhanced.

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

[0078] Optionally, as shown in the drawings, the blades 223 are provided with first hollow holes 2233 penetrating along the thickness direction thereof. The blades 223 of the mineralizing device of the embodiment of the present application are designed as a hollow structure, so that it is easier to generate micro-bubbles when the impeller rotates, the mixing effect of the pulp and the bubbles is better, and the mineralization of the fine-grained minerals is more favorable. Figure 7 For example, the first hollow holes 2233 can be strip-shaped holes or circular holes. The strip-shaped holes can extend obliquely, horizontally or vertically. The first hollow holes 2233 can be multiple, and the multiple first hollow holes 2233 are arranged discretely.

[0079] In some embodiments, as shown in the drawings, in the longitudinal section of the mineralizing tank 1, the peripheral wall of the mineralizing tank 1 comprises a plurality of line segments 19 connected in sequence, and the inclination angles of adjacent line segments 19 are different from each other.

[0080] Figure 3 In some embodiments, as shown in the drawings, in the longitudinal section of the mineralizing tank 1, the peripheral wall of the mineralizing tank 1 comprises a plurality of line segments 19 connected in sequence, and the inclination angles of adjacent line segments 19 are different from each other. Figure 4 In the mineralization process, the pulp is introduced into the mineralizing tank 1 through the pulp inlet 11 in the direction from bottom to top, and the rotor 22 rotates and stirs in the mechanical stirring chamber 13, thereby mineralizing the pulp to generate mineralization foam. Since, in the longitudinal section of the mineralizing tank 1, the peripheral wall of the mineralizing tank 1 comprises a plurality of line segments 19 connected in sequence, the reflection, rectification and surging of the pulp by the inner wall of the mineralizing tank 1 are enhanced, the mineralization effect is improved, and since the inclination angles of adjacent line segments 19 are different from each other, i.e., the inclination angles of different parts of the peripheral wall of the mineralizing tank 1 are different, the angles of the pulp reflected by different peripheral wall parts are different, compared with the arc-shaped peripheral wall, the effect of the mutual collision of the pulp flows reflected by the peripheral wall parts with different inclination angles in the mineralizing tank 1 is enhanced, thereby enhancing the turbulence generated by the mineralizing tank 1, reducing the mineralization weak area, further improving the generation of bubbles and the probability of attachment with particles, thereby improving the mineralization effect, and reducing the local wear of the mineralizing tank 1.

[0081]

[0082] ​​For example, the cross-sectional area of the mechanical stirring cavity 13 gradually decreases along the upward direction, and the mineralization tank 1 can have a generally segmented basin structure. The segmented basin-shaped mechanical stirring cavity 13 can provide reflection force in multiple directions for the mineral slurry and bubbles stirred by the rotor 22, thereby enhancing the mineral slurry flow collision effect, increasing the turbulence intensity, and improving the mineralization effect.

[0083] Compared with the mineralization tank 1 with a parabolic or arc structure in the related art, the mineralization tank 1 of the mineralization device in the embodiment of the present application is easier to process and obtain multiple reflection focal points. In other words, the mineralization tank 1 in the embodiment of the present application is easier to achieve multiple reflection focal points close to the theoretical design, thereby improving the actual application effect. For mineralization tanks 1 of different sizes, by adjusting the number and inclination angle of the line segments 19 in the longitudinal section of the mineralization tank 1, a scheme close to the theoretical focal point can still be obtained, and the theoretical flow field model can be more easily realized, that is, the flow is folded and surges in multiple directions along the inner wall of the mineralization tank 1, thereby forming a strong turbulent flow field. The mineralization tank 1 in the embodiment of the present application can strengthen the overall mineralization and reduce the mineralization weak area in the mechanical stirring cavity 13, thereby reducing the local excessive wear of the mineralization tank 1.

[0084] For example, for relatively coarse 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 enable the particles to participate in the circulation and mixed mineralization multiple times, reduce the falling of coarse particles, and avoid the phenomenon of slurry sedimentation and pipeline blockage.

[0085] The angle of the edge of the slurry outlet 12 of the mineralization tank 1 in the embodiment of the present application can be adaptively adjusted to avoid excessive angle causing the slurry to rush out of the mineralization tank 1, thereby being beneficial to improving the mineralization efficiency and effect of the mineralization tank 1.

[0086] Optionally, as shown in Figure 3 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°, or 80°. Alternatively, the inclination angle α can be close to and less than 90°. The inventors of the embodiment of the present application have found through research and verified through experiments that when the inclination angle α between the line segment 19 and the horizontal plane is in the above angle range, the mineral material can better participate in the 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, thereby being beneficial to improving the mineralization efficiency and effect of the mineralization tank 1.

[0087] Optionally, the number of the line segments 19 is proportional to the area of the pulp outlet 12. It can be understood that the larger the area of the pulp outlet 12 is, the more the number of the line segments 19 can be, thereby the reflection and rectification effects of the mineralization tank 1 can be improved, so as to form a strong turbulent flow field. When the mineralization tank 1 is designed, the structure of the mineralization tank 1 can be adjusted according to the increase of the mineralization tank 1 and the change of the mineral type, so as to meet the mineralization requirements of the mineralization device and improve the mineralization effect.

[0088] In some embodiments, as shown in Figure 3 the flotation device further comprises a feed tank 33 arranged below the mineralization tank 1, the feed tank 33 having a feed inlet adapted to be connected with the feed pipe 32 for feeding the pulp into the feed tank 33 and a discharge outlet communicating with the pulp inlet 11 for feeding the pulp in the feed tank 33 into the mechanical stirring cavity 13. The feed tank 33 is separately made or integrally made with the mineralization tank 1. It can be understood that the pulp is first fed into the feed tank 33 by the feed pipe 32, and then the pulp enters the mineralization tank 1 through the feed tank 33. The flotation device of the embodiment of the present application can buffer the pulp before entering the mineralization tank 1, so that the pulp can quickly enter the flow field stirred by the impeller, which is beneficial to improve the turbulent effect of the reinforced pulp in the mechanical stirring cavity 13, enhance the capturing effect of the bubbles on the target minerals, and enhance the strength of the internal pulp circulation.

[0089] In some embodiments, as shown in Figure 3 and Figure 10 the flotation device further comprises an anti-settling assembly 34, the anti-settling assembly 34 comprising 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 cavity 13 and below the rotor 22, and the rake frame 341 is driven to rotate by the rotating shaft 21; the spray gun 342 has a spray end extending into the bottom of the mechanical stirring cavity 13 for spraying water and / or gas to the bottom of the mechanical stirring cavity 13.

[0090] It can be understood that when the anti-settling assembly 34 is the rake frame 341, the rake frame 341 is arranged at the bottom of the mechanical stirring cavity 13 and below the rotor 22, and the rake frame 341 can be driven to rotate by the rotating shaft 21. When the anti-settling assembly 34 is the spray gun 342, the spray end of the spray gun 342 extends into the bottom of the mechanical stirring cavity 13 for spraying water and / or gas to the bottom of the mechanical stirring cavity 13. The rake frame 341 and the spray gun 342 can prevent the problem of deposition and clogging of particles not attached to the bubbles in the mechanical stirring cavity 13, which is beneficial to improve the mineralization effect of the pulp. Preferably, the spray gun 342 sprays air.

[0091] In some embodiments, as shown in Figure 9As shown, the flotation device further comprises a bubble scraping device 6, which comprises a rotatable scraping plate 61 arranged in the tank body 4 and in the froth zone on the upper side of the upper region 42. The scraping plate 61 is arc-shaped or involute-shaped, and the included angle between the scraping plate 61 and the vertical plane is 0-30 degrees. It can be understood that the rotation axis of the scraping plate 61 is collinear with the axis of the tank body 4. When the scraping plate 61 rotates, the mineralized froth in the froth zone can be scraped to collect and discharge the mineralized froth.

[0092] Since the scraping plate 61 is arc-shaped or involute-shaped, the extension path of the scraping plate 61 can be extended, the resistance during the movement of the scraping plate 61 can be reduced, and the energy consumption during the movement of the scraping plate 61 can be reduced. In addition, since the included angle between the scraping plate 61 and the vertical plane can be 0-30 degrees, for example, the included angle between the scraping plate 61 and the vertical plane is 1 degree, 10 degrees, 15 degrees, 20 degrees, 25 degrees, or 30 degrees. Thus, the rapid scraping of the scraping plate 61 can be realized, and the scraping plate 61 can scrape a thicker froth layer, which is beneficial to improve the scraping efficiency of the scraping plate 61.

[0093] Alternatively, the scraping plate 61 is at least two layers and is arranged in the up-down direction. Each layer of the scraping plate 61 is a plurality of scraping plates 61, and each layer of the plurality of scraping plates 61 is arranged in the circumferential direction of the tank body 4. The flotation device of the embodiment of the present application can improve the separation effect of the mineralized bubbles and improve the scraping efficiency of the scraping plate 61 by arranging at least two layers of the scraping plate 61.

[0094] For the adjacent two layers of the scraping plate 61, the number of the upper layer of the scraping plate 61 can be greater than the number of the lower layer of the scraping plate 61. It can be understood that the plurality of scraping plates 61 of the upper layer are arranged more densely, and the plurality of scraping plates 61 of the lower layer are arranged more sparsely. The lower layer of the sparse scraping plate 61 can separate the mineralized froth in the upper region 42, and the upper layer of the dense scraping plate 61 can improve the scraping amount of the mineralized froth when rotating to scrape a thicker froth layer, which is beneficial to improve the scraping efficiency of the scraping plate 61.

[0095] Alternatively, the axial position of the scraping plate 61 along the tank body 4 is adjustable, so that the scraping layer of the scraping plate 61 is matched with the ore grade, which improves the compatibility and applicability of the flotation device, and expands the application range of the flotation device. For example, the scraping plate 61 can be installed on the rotating shaft 21 in a clamp type structure, and the position of the scraping plate 61 along the rotating shaft 21 is adjustable.

[0096] Alternatively, the scraping plate 61 is provided with a third hollow hole (not shown) penetrating in the thickness direction thereof. That is, the scraping plate 61 is designed as a hollow structure, which can make the scraping of the scraping plate 61 more smooth.

[0097] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0098] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0099] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0100] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0101] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific feature, structure, material or characteristic being described with reference to the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the features of different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0102] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the changes, modifications, replacements and modifications of the above embodiments made by the person skilled in the art are within the protection scope of the present application.

Claims

1. An inner-outer nested combined mineralization flotation device, characterized in that, The application relates to a mineralization device, which comprises a tank body, a mineralization device, a driving device and an aeration 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, the mineralization tank is provided with a mechanical stirring cavity for mechanically stirring the ore slurry, the mineralization tank is provided with a slurry inlet for feeding the ore slurry into the mechanical stirring cavity, the top of the mineralization tank is provided with a slurry outlet for discharging the ore slurry, 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, 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 arranged on the lower end of the rotating shaft and located in the mechanical stirring cavity, and the rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring cavity. The aeration device is communicated with the column selection area and used for filling the gas into the column selection area to perform column selection on the ore slurry entering the column selection area from the mechanical stirring cavity. The driving device is arranged above the tank body and connected with the rotating shaft to drive the rotating shaft and the rotor to rotate. The mineralization tank comprises a cylinder and a tank bottom, and the tank bottom is connected with the lower end of the cylinder.

2. The inner-outer nested combined mineralization flotation device according to claim 1, characterized in that, A plurality of turbulence enhancement plates are arranged in the mechanical stirring cavity, the plurality of turbulence enhancement plates are arranged along the circumferential direction of the mineralization tank and surround the rotor.

3. The inner-outer nested combined mineralization flotation device according to claim 2, characterized in that, A plurality of first baffles are arranged in the mechanical stirring cavity, the plurality of first baffles are arranged along the circumferential direction of the cylinder and are higher than the rotor, and in the horizontal projection of the mineralization tank, the first baffles extend inwardly beyond the outer peripheral contour line of the rotor.

4. The inner-outer nested combined mineralization flotation device according to claim 3, characterized in that, A plurality of second baffles are arranged in the mechanical stirring cavity, the plurality of second baffles are arranged along the circumferential direction of the tank bottom and are lower than the rotor, and in the horizontal projection of the mineralization tank, the second baffles extend inwardly beyond the outer peripheral contour line of the rotor.

5. The inner-outer nested combination mineralization flotation device according to claim 3, characterized in that, The rotor is an impeller, the outer diameter of the impeller is A, the gap between the outer side of the impeller and the inner side of the turbulence enhancement plate in the radial direction of the rotating shaft is B, and 0.03A<=B<=0.2A.

6. The inner-outer nested combination mineralization flotation device according to claim 3, characterized in that, An upper area is arranged above the mineralization tank in the tank body, and a turbulence suppression grid is arranged in the column selection area and adjacent to the upper area and / or the lower part of the turbulence suppression grid is arranged in the upper area.

7. The inner-outer nested combination mineralization flotation device according to claim 1, characterized in that, An upper area is arranged above the mineralization tank in the tank body, and a turbulence suppression grid is arranged in the upper area and / or the column selection area, and the position of the turbulence suppression grid in the up-down direction is adjustable.

8. The inner-outer nested combination mineralization flotation device according to claim 1, characterized in that, The rotor is an impeller, the impeller is located in the mechanical stirring cavity, the impeller comprises a disc and a plurality of blades, the disc is arranged on the lower end of the rotating shaft, the plurality of blades are arranged along the circumferential direction of the disc and the outer periphery of the disc, in the longitudinal section of the impeller, the contour line of the outer side of the blade comprises a vertical section and an arc section, the arc section is arranged on the upper section of the vertical section and gradually extends inwardly.

9. The inner-outer nested combined mineralization flotation device according to any one of claims 1-8, characterized in that, ​ 10. The inner-outer nested combination mineralization flotation device according to claim 9, characterized in that, The wheel disc has a jet passage in communication with the gas supply passage in the rotating shaft, and the jet outlet of the jet passage is formed on the outer circumferential surface of the wheel disc and is arranged at intervals along the circumference of the wheel disc.

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