Tandem type multiple flotation equipment

Abstract

The utility model relates to tandem type multiple flotation equipment. The tandem type multiple flotation equipment comprises a mechanical stirring device, a column selection device, a first connecting pipeline and a second connecting pipeline. The mechanical stirring device comprises a first tank, a mineralization tank and a rotor assembly, a mechanical stirring area and a first foam area are arranged in the first tank, the mineralization tank is arranged in the mechanical stirring area and provided with a mechanical stirring cavity, and the rotor assembly comprises a rotating shaft and a rotor which is installed at the lower end of the rotating shaft and located in the mechanical stirring cavity; the column separation device comprises a second tank and an air inflation device, the second tank is arranged outside the first tank, a column separation area and a second foam area are arranged in the second tank, the first connecting pipeline is used for conveying ore grains which are not attached to bubbles in the mechanical stirring area to the column separation area, and the second connecting pipeline is used for conveying mineralized foam in the second foam area to the first foam area. The tandem type multi-flotation equipment disclosed by the utility model is good in flotation effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flotation, specifically, a series connection type multiple flotation equipment. BACKGROUND

[0002] Flotation is a widely used mineral processing method. When flotation is carried out using a flotation device, ore pulp is fed into a flotation tank and subjected to mechanical stirring or aeration to mineralize. After mineralization, target particles selectively adhere to bubbles to form mineralized bubbles, which float upwards, and other particles that do not adhere to the bubbles are discharged from the bottom of the flotation tank with the ore pulp, thereby achieving the purpose of separating minerals.

[0003] In related technologies, mechanical stirring and column selection are integrated in the same tank body. Although this reduces the occupied space of the flotation device, mechanical stirring and column selection can easily affect each other and affect the flotation effect. SUMMARY

[0004] The utility model aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, the utility model embodiment provides a series connection type multiple flotation equipment, which has good flotation effect.

[0006] The utility model embodiment further provides a series connection type multiple flotation equipment.

[0007] The series connection type multiple flotation equipment according to the utility model embodiment comprises a mechanical stirring device, a column selection device, a first connecting pipeline, and a second connecting pipeline. The mechanical stirring device comprises a first tank, a mineralization tank, a rotor assembly, and a bubble scraping assembly. The first tank is provided with a mechanical stirring area and a first foam area. The first foam area is located above the mechanical stirring area. The mineralization tank is located in the mechanical stirring area and has a mechanical stirring cavity. 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 bubble scraping assembly is arranged in the first foam area. The column selection device comprises a second tank and an aeration device. The second tank is arranged outside the first tank. The second tank is provided with a column selection area and a second foam area. The second foam area is located above the column selection area. The aeration 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. The first connecting pipeline is in communication with the mechanical stirring area and the column selection area and is used to transport ore particles that do not adhere to bubbles in the mechanical stirring area to the column selection area. The second connecting pipeline is in communication with the first foam area and the second foam area and is used to transport mineralized foam in the second foam area to the first foam area.

[0008] The series type multiple flotation device according to the embodiment of the utility model, when mineralizing, first pass the ore pulp into the first tank, the rotor rotates in the mechanical stirring cavity to produce mineralization bubbles, the mineral grains not attached to the bubbles enter into the second tank through the first connecting pipeline, under the action of the gas supplied by the aeration device, the mineral grains not attached to the bubbles are column selected, then the mineralization bubbles after column selection are passed into the first bubble zone through the second connecting pipeline, then the mineralization bubbles are separated in the first tank through the bubble scraping assembly. Since the first tank and the second tank are independent of each other, and the ore pulp is subjected to multiple flotation, the problem of mutual influence of mechanical stirring and column selection can be avoided, and the flotation effect of the series type multiple flotation device can be improved.

[0009] In some embodiments, the series type multiple flotation device further comprises a first driving motor and a first auger shaft, the first auger shaft is arranged in the first connecting pipeline, the first driving motor is connected with the first auger shaft to drive the ore pulp in the first connecting pipeline to flow; or the second tank is located below the first tank, the mineral grains not attached to the bubbles in the mechanical stirring area flow into the column selection area through the first connecting pipeline.

[0010] In some embodiments, the series type multiple flotation device further comprises a second driving motor and a second auger shaft, the second auger shaft is arranged in the second connecting pipeline, the second driving motor is connected with the second auger shaft to drive the mineralization bubbles in the second connecting pipeline to flow; or the second tank is located above the first tank, the mineralization bubbles in the second bubble zone flow into the first bubble zone.

[0011] In some embodiments, the series type multiple flotation device further comprises a buffer tank, the buffer tank is provided with a stirring device, and the buffer tank is connected in series on the first connecting pipeline.

[0012] In some embodiments, the mechanical stirring devices are multiple, the multiple mechanical stirring devices are connected in series, and the mechanical stirring device at the end of the series is connected with the second tank.

[0013] In some embodiments, the column selection devices are multiple, the multiple column selection devices are connected in series, and the column selection device at the beginning of the series is connected with the first tank.

[0014] In some embodiments, the series type multiple flotation device further comprises a pre-mineralization device, the pre-mineralization device is used for pre-mineralizing the ore pulp, the pre-mineralization device is arranged outside the first tank and communicates with a pulp outlet of the mechanical stirring cavity to supply the pre-mineralized ore pulp into the mechanical stirring cavity, and the pre-mineralization device is a mechanical stirring type or an aeration mineralization type.

[0015] In some embodiments, the rotor is an impeller, which comprises a hub, a disc, a top plate, a bottom plate and blades, the hub is mounted on the lower end of the rotating shaft, the disc, the top plate and the bottom plate are mounted on the hub and the disc is located between the top plate and the bottom plate, the blades comprise upper blades and lower blades, and the upper blades and the lower blades are both multiple, the multiple upper blades are arranged between the upper surface of the disc and the top plate and are spaced along the circumference of the disc, the multiple lower blades are arranged between the lower surface of the disc and the disc and are spaced along the circumference of the disc, and the upper blades and the lower blades are arranged one by one or staggered along the circumference of the disc.

[0016] In some embodiments, in the longitudinal section of the mineralization tank, the peripheral wall of the mineralization tank comprises multiple line segments which are sequentially connected, and the angles of adjacent line segments are different from each other.

[0017] In some embodiments, the mechanical stirring device further comprises a cover plate arranged above the mineralization tank, wherein the cover plate is opposite to and spaced from the pulp inlet on the top surface of the mineralization tank, or the cover plate covers the pulp inlet and is provided with a flow hole for communication between the mechanical stirring cavity and the outside of the mechanical stirring cavity. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of a series type multi-flotation device according to an embodiment of the present application.

[0019] Figure 2 is a schematic view of a series type multi-flotation device according to another embodiment of the present application.

[0020] Figure 3 is a schematic view of a mechanical stirring device of a series type multi-flotation device according to an embodiment of the present application.

[0021] Figure 4 is a top view of the installation of a first tank and a bubble scraping assembly of a series type multi-flotation device according to an embodiment of the present application.

[0022] Figure 5 is a schematic view of a rotor of a series type multi-flotation device according to an embodiment of the present application.

[0023] REFERENCE SIGNS:

[0024] 1. Mechanical stirring device; 11. First tank; 111. Mechanical stirring area; 112. First foaming area; 12. Mineralization tank; 121. Slurry inlet; 122. Slurry outlet; 123. Mechanical stirring chamber; 124. Line segment; 13. Rotor assembly; 131. Rotating shaft; 1311. Air supply channel; 132. Rotor; 1321. Wheel; 1322. Blade; 13221. Upper blade; 13222. Lower blade; 1323. Top plate; 1324. Bottom plate; 14. Foam scraping assembly; 141. Scraper; 15. Rake frame; 16. Cover plate;

[0025] 2. Column separation device; 21. Second tank; 211. Column separation area; 212. Second foam zone; 22. Air filling device;

[0026] 31. First connecting pipe; 32. Second connecting pipe; 33. First auger shaft; 34. Pre-mineralization device; 35. Feed pipe;

[0027] 41. Buffer tank; 42. Stirring device. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] The following is a reference appendix. Figures 1 to 5 This invention describes a series multiple flotation device according to an embodiment of the present invention.

[0030] like Figures 1 to 3 As shown, the series multiple flotation device of this utility model embodiment includes: a mechanical stirring device 1, a column separator 2, a first connecting pipe 31, and a second connecting pipe 32. The mechanical stirring device 1 includes a first tank 11, a mineralization tank 12, a rotor assembly 13, and a bubble scraping assembly 14. The rotor assembly 13 includes a rotating shaft 131 and a rotor 132. The column separator 2 includes a second tank 21 and an aeration device 22.

[0031] The first tank 11 is provided with a mechanical stirring area 111 and a first foaming area 112. The first foaming area 112 is located above the mechanical stirring area 111. The mineralization tank 12 is located in the mechanical stirring area 111 and has a mechanical stirring chamber 123. The mechanical stirring chamber 123 is used for mineralization, which is referred to as mechanical stirring mineralization. Under the mechanical stirring action of the rotor assembly 13, the target particles in the slurry and the air supplied into the mechanical stirring chamber 123 cause the target particles to adhere to the bubbles to form mineralization bubbles, thereby realizing mechanical stirring flotation.

[0032] The lower end of the rotating shaft 131 extends into the mechanical stirring cavity 123 through the pulp inlet 121 on the top surface of the first tank 11, the rotor 132 is installed on the lower end of the rotating shaft 131 and located in the mechanical stirring cavity 123, and the bubble scraping assembly 14 is arranged at the upper portion of the first foam area 112. The second tank 21 is arranged outside the first tank 11, the column selection area 211 and the second foam area 212 are arranged in the second tank 21, the second foam area 212 is located above the column selection area 211, and the aeration device 22 is in communication with the column selection area 211 and used for filling the column selection area 211 with gas to perform column selection on the ore pulp entering the column selection area 211.

[0033] The first connecting pipeline 31 is in communication with the mechanical stirring area 111 and the column selection area 211 and used for conveying the ore particles not attached to the bubbles in the mechanical stirring area 111 to the column selection area 211. The second connecting pipeline 32 is in communication with the first foam area 112 and the second foam area 212 and used for conveying the mineralized bubbles in the second foam area 212 to the first foam area 112.

[0034] According to the series type multiple flotation equipment provided by the embodiment of the utility model, when mineralization is performed, the ore pulp is first fed into the first tank 11, the rotor 132 rotates in the mechanical stirring cavity 123 to generate mineralized bubbles, the ore particles not attached to the bubbles are fed into the second tank 21 through the first connecting pipeline 31, the ore particles not attached to the bubbles are subjected to column selection under the action of the gas supplied by the aeration device 22, then the mineralized bubbles after column selection are fed into the first foam area 112 through the second connecting pipeline 32, and then the mineralized bubbles are separated in the first tank 11 through the bubble scraping assembly 14. Since the first tank 11 and the second tank 21 are independent of each other and the ore pulp is subjected to multiple flotation, the problem that the mechanical stirring and the column selection interfere with each other can be avoided, and thus the flotation effect of the series type multiple flotation equipment can be improved.

[0035] It can be understood that mineralization refers to a selective adhesion process of target particles and bubbles, after mineralization, the ore pulp includes mineralized bubbles (the mineralized bubbles can be called mineralized bubbles after aggregation, and in the following description, the mineralized bubbles and the mineralized bubbles can be used interchangeably) and other particles not attached to the bubbles, the mineralized bubbles are target particles attached to the bubbles, and here, the target particles attached to the bubbles can also be called mineralized particles, and the other particles can include target particles not attached to the bubbles, non-target mineral particles not attached to the bubbles and tailing particles.

[0036] In the example of the utility model, the mechanical stirring device 1 and the column selection device 2 are connected with each other in series, the mechanical stirring device 1 can mechanically stir the ore pulp, the column selection device 2 can column select the ore pulp, the mineralized froth after column selection is conveyed back to the first tank 11 and enters the first froth zone 112 together with the mineralized froth after mechanical stirring, and then the mineralized froth is separated by the froth scraping assembly 14. Compared with the scheme that the mechanical stirring and the air charging stirring are integrated in the same tank, the utility model can avoid the problem that the mechanical stirring flotation and the column selection affect each other, and improves the flotation effect of the flotation equipment.

[0037] In some embodiments, the rotating shaft 131 has a gas supply channel 1311 for supplying gas into the mechanical stirring cavity 123. It can be understood that the gas in the mechanical stirring cavity 123 is supplied through the gas supply channel 1311 in the rotating shaft 131, so that the rotating shaft 131 can not only drive the rotor 132 to rotate, but also provide gas for the mechanical stirring cavity 123, and the structure is compact and the number of parts used is reduced.

[0038] In other examples, the mineralizing device can also charge gas into the mechanical stirring cavity 123 through a pipeline at the position of the pulp outlet 122 of the mineralizing tank 12, and of course the gas can also be introduced into the mechanical stirring cavity 123 by self-suction.

[0039] Optionally, as shown in Figure 1 The series type multiple flotation equipment also includes a first driving motor (not shown) and a first auger shaft 33, the first auger shaft 33 is arranged in the first connecting pipeline 31, and the first driving motor is connected with the first auger shaft 33 to drive the ore pulp in the first connecting pipeline 31 to flow. It can be understood that the first driving motor is used to drive the first auger shaft 33 to rotate, and when the first auger shaft 33 rotates, the ore pulp in the first connecting pipeline 31 can enter the second tank 21 from the first tank 11 to complete the conveying work of the ore pulp. The flotation equipment of the utility model embodiment can improve the flow of the ore pulp conveying and avoid the problem that the ore pulp blocks the first connecting pipeline 31 by arranging the first connecting pipeline 31 in the above structure.

[0040] In another example, the second tank 21 is located below the first tank 11, and the mineral particles not attached to the bubbles in the mechanical stirring area 111 flow into the column selection area 211 by the first connecting pipeline 31. It can be understood that since the position of the first tank 11 is higher, the connection position of the first connecting pipeline 31 and the first tank 11 is higher than the connection position of the first connecting pipeline 31 and the second tank 21, so the ore pulp in the first connecting pipeline 31 can flow into the second tank 21 under the action of gravity, thereby reducing the manufacturing cost of the flotation equipment.

[0041] Optionally, the series multiple flotation device further comprises a second driving motor (not shown) and a second auger shaft (not shown), the second auger shaft is arranged in the second connecting pipeline 32, and the second driving motor is connected with the second auger shaft to drive the mineralized foam in the second connecting pipeline 32 to flow. It can be understood that the second driving motor is used to drive the second auger shaft to rotate, and when the second auger shaft rotates, the mineralized foam in the second connecting pipeline 32 can be driven to enter from the second tank 21 into the first tank 11, so as to complete the conveying work of the mineralized foam. The flotation device of the embodiment of the present application can improve the smoothness of the mineralized foam conveying and avoid the problem of mineralized foam blocking the second connecting pipeline 32 by arranging the second connecting pipeline 32 in the above structure.

[0042] In another example, the second tank 21 is located above the first tank 11, and the mineralized foam in the second foam area 212 flows into the first foam area 112. It can be understood that, due to the higher position of the second tank 21, the connection position of the second connecting pipeline 32 and the second tank 21 is higher than the connection position of the second connecting pipeline 32 and the first tank 11, so that the mineralized foam in the second connecting pipeline 32 can flow into the first foam area 112 of the first tank 11 under the action of gravity, thereby reducing the manufacturing cost of the flotation device.

[0043] In some embodiments, as shown in Figure 1 and Figure 2 The series multiple flotation device further comprises a buffer tank 41, the buffer tank 41 is provided with a stirring device 42, and the buffer tank 41 is connected in series on the first connecting pipeline 31. It can be understood that the ore pulp in the first tank 11 can first enter the buffer tank 41 for buffering, and then enter the second tank 21. On the one hand, the ore pulp can be further stirred by the stirring device 42 in the buffer tank 41 to perform secondary mineralization flotation, which is beneficial to improve the mineralization effect. On the other hand, when the material in the second tank 21 is full, it can be first introduced into the buffer tank 41 for storage, so that the flotation device can continuously operate without stopping.

[0044] In some examples, as shown in Figure 2 The mechanical stirring device 1 is multiple, the multiple mechanical stirring devices 1 are connected in series, and the mechanical stirring device 1 at the end of the series is connected with the second tank 21. It can be understood that the ore pulp is subjected to step-by-step mineralization through the multiple mechanical stirring devices 1, and finally the ore particles not attached to the bubbles are introduced into the column selection device 2 (second tank 21), thereby further improving the mineralization effect. In addition, since the number of mechanical stirring devices 1 can be stacked, the number of mechanical stirring devices 1 can be selectively increased or decreased according to the different types of ore pulp, so that the application range of the flotation device is wider.

[0045] In some examples, the column selection device 2 is a plurality of column selection devices 2, the plurality of column selection devices 2 are connected in series, and the column selection device 2 at the head of the series is connected to the first tank 11. It can be understood that the ore pulp after passing through the mechanical stirring device 1 can be introduced into the column selection device 2 for column selection. Since the column selection device 2 is a plurality of column selection devices 2, the plurality of column selection devices 2 can perform step-by-step column selection on the mechanically stirred ore pulp to further improve the mineralization effect. In addition, since the number of column selection devices 2 can be stacked, the number of mechanical stirring devices 1 can be selectively increased or decreased according to the different types of ore pulp, thereby making the application range of the flotation equipment wider.

[0046] Optionally, as shown in Figure 1 and Figure 2 , the flotation equipment further comprises a rake frame 15 installed at the bottom of the inner cavity of the first tank 11. The rake frame 15 can rotate around the axis of the first tank 11 to prevent the problem of ore particles accumulating at the bottom of the first tank 11, and to facilitate the smoothness of the discharge of the discharge port at the bottom of the first tank 11.

[0047] Alternatively, the rake frame 15 is installed at the bottom of the inner cavity of the second tank 21. The rake frame 15 can rotate around the axis of the second tank 21 to prevent the problem of ore particles accumulating at the bottom of the second tank 21, and to facilitate the smoothness of the discharge of the discharge port at the bottom of the second tank 21.

[0048] In some embodiments, as shown in Figure 3 and Figure 4 , the bubble scraping assembly 14 comprises a rotatable scraper 141, the scraper 141 is arranged in the cleaning zone above the first froth zone 112, the scraper 141 is arc-shaped or involute-shaped, and the included angle between the scraper 141 and the vertical surface of the first tank 11 is 0-30 degrees. It can be understood that the rotation axis of the scraper 141 is collinear with the axis of the first tank 11, and when the scraper 141 rotates, it can scrape the mineralized froth in the first froth zone 112 to collect the cleanest concentrate on the surface of the froth layer.

[0049] Optionally, as shown in Figure 3As shown, the series multi-flotation device further comprises a pre-mineralization device 34 for pre-mineralizing the ore slurry, the pre-mineralization device 34 is arranged outside the first tank 11 and in communication with the slurry outlet 122 of the mechanical stirring cavity 123 to supply the pre-mineralized ore slurry into the mechanical stirring cavity 123, the pre-mineralization device 34 can be a mechanical stirring type or a column selection type. It can be understood that when the series multi-flotation device is mineralizing the ore slurry, the ore slurry is first pre-mineralized by the pre-mineralization device 34, that is, a part of the micro-bubbles is formed in the ore slurry, so that a part of the target particles are attached to the bubbles, and then the pre-mineralized ore slurry is supplied into the first tank 11 through the feeding pipe 35 for mechanical stirring, and then enters the second tank 21 for column selection. Thereby, the mineralization effect can be further improved, and the flotation of fine particles is particularly beneficial.

[0050] In some embodiments, as shown in Figure 3 and Figure 5 The rotor 132 is an impeller, which includes a hub, a disc 1321, a top plate 1323, a bottom plate 1324, and blades 1322 including upper blades 13221 and lower blades 13222. The hub is mounted at the lower end of the rotating shaft 131, the disc 1321, the top plate 1323, and the bottom plate 1324 are mounted on the hub, and the disc 1321 is located between the top plate 1323 and the bottom plate 1324.

[0051] The upper blades 13221 and the lower blades 13222 are both multiple, the multiple upper blades 13221 are arranged between the upper surface of the disc 1321 and the top plate 1323 and are spaced along the circumference of the disc 1321, and the multiple lower blades 13222 are arranged between the lower surface of the disc 1321 and the disc 1321 and are spaced along the circumference of the disc 1321. The upper blades 13221 and the lower blades 13222 are one-to-one corresponding or staggered along the circumference of the disc 1321.

[0052] Preferably, the upper blades 13221 and the lower blades 13222 are staggered, that is, the upper blades 13221 and the lower blades 13222 are not aligned with each other along the axial direction of the impeller.

[0053] When the impeller rotates, the upper blades 13221 on the upper side of the disc 1321 and the lower blades 13222 on the lower side of the disc 1321 can rotate at the same time, which can enhance the slurry suction capacity of the impeller (the ability to suck the ore slurry from the slurry outlet 122 into the mechanical stirring cavity 123), on the one hand, and can enhance the strength of the internal ore slurry circulation, improve the mineralization effect, and enhance the selectivity in the flotation process.

[0054] For example, the upper blade 13221 and the lower blade 13222 are arranged radially, with the number of both upper blade 13221 and lower blade 13222 ranging from 4 to 16, and are evenly distributed. It should be noted that the number of upper blade 13221 and lower blade 13222 can be equal or unequal, and this utility model does not limit this.

[0055] Since the upper blade 13221 is located between the upper surface of the impeller 1321 and the top plate 1323, and the lower blade 13222 is located between the lower surface of the impeller 1321 and the impeller 1321, the intensity of the internal slurry circulation can be further enhanced, the energy utilization rate of the impeller rotation can be improved, the effect of bubbles capturing target minerals can be enhanced, and the selectivity in the flotation process can be improved.

[0056] For example, the outer periphery of the top plate 1323 is substantially the same in size as the outer periphery formed by the plurality of upper blades 13221. The outer periphery of the bottom plate 1324 is substantially the same in size as the outer periphery formed by the plurality of lower blades 13222.

[0057] Optionally, such as Figure 3 As shown, in the longitudinal section of the mineralization tank 12, the peripheral wall of the mineralization tank 12 includes a plurality of line segments 124 connected in sequence, and the inclination angles of adjacent line segments 124 are different from each other. When the mechanical stirring device 1 mineralizes the slurry, the slurry is introduced into the mineralization tank 12 from bottom to top through the slurry outlet 122. The rotor 132 rotates in the mechanical stirring chamber 123 to generate mineralization foam. Since the peripheral wall of the mineralization tank 12 includes a plurality of line segments 124 connected in sequence, and the inclination angles of adjacent line segments 124 are different from each other, the mineralization foam can surge upward under the reflection and rectification effect of the inner wall of the mineralization tank 12, which can allow the ore to participate in circulation and mixing mineralization multiple times, enhance the turbulence effect of the mineralization tank 12. Since the mineralization foam can surge upward under the reflection and rectification effect of the inner wall of the mineralization tank 12, the probability of local wear of the mineralization tank 12 can be reduced.

[0058] In the related art, mineralization is carried out in a tank of a flotation device, and ore pulp is supplied from the outside into the tank, and mineralization is carried out under the action of air supply into the ore pulp and mechanical stirring. However, the inventors have found that, due to the large space in the 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 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, the reflection bottom reflects the ore pulp containing mineralized bubbles out of the reflection bottom to improve the flotation efficiency, but 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 tank, the reflection action of the reflection bottom can improve the flotation efficiency to a certain extent, but since the top of the reflection bottom is open, 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.

[0059] In order to further improve the mineralization and flotation effect and improve the flotation efficiency, the inventors have proposed a limited mineralization scheme, that is, compared with the related art, mineralization is carried out in a relatively closed and relatively small limited space, which can also be referred to as a limited space, a limited area, a limited region, or a limited area, simply referred to as a limited area. For example, the limited area is smaller and relatively closed than the tank cavity in the related art, and is relatively closed compared with the open parabolic-shaped reflection bottom in the related art. During the mineralization process, ore pulp and 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 target particles in the ore pulp are repeatedly reflected, stirred and collided in the limited space, the contact time, contact frequency and collision frequency of the air bubbles and target particles are improved, thereby improving the mineralization and flotation effect, and further improving the efficiency. Therefore, in the present application, the mineralization carried out in the limited space can be referred to as limited mineralization.

[0060] Specifically, as Figure 3As shown, the mechanical stirring device 1 further comprises a cover plate 16 arranged above the mineralization tank 12, wherein the cover plate 16 is opposite to the pulp inlet 121 and spaced apart from the top surface of the mineralization tank 12 so as to allow the mineralized pulp to flow out. It can be understood that the cover plate 16 and the mineralization tank 12 define a confined mineralization area including the mechanical stirring cavity 123. The mechanical stirring device 1 of the embodiment of the present application improves the sealing of the mechanical stirring cavity 123 by arranging the cover plate 16 above the mineralization tank 12, which can prolong the time for the pulp to reflect, rectify and surge in the mechanical stirring cavity 123, so as to increase the contact time, contact frequency and impact frequency of the bubbles and target particles, thereby improving the mineralization and flotation effect. The mineralization effect is improved, and the pulp can flow out from the pulp inlet 121 of the mechanical stirring cavity 123 uniformly, the flow field disturbance formed by the rotation of the impeller is blocked by the cover plate 16, and the turbulence intensity in the lower region of the first froth zone 112 above the mechanical stirring cavity 123 is low, which is beneficial to the upward movement of the mineralized bubbles.

[0061] In other words, the pulp is more turbulent in the relatively closed and relatively small area of the mineralization tank 12 with the cover plate 16, the bubbles are smaller, and the fine particles are more easily captured. The mineralized bubbles flow more smoothly in the lower region of the first froth zone 112 above the mechanical stirring cavity 123, the attached particles are more stable, and are not easy to fall off.

[0062] The spacing distance between the cover plate 16 and the top surface of the mineralization tank 12 can be adjusted adaptively according to different types of pulp, which is not limited in the present application.

[0063] In other examples, the cover plate 16 covers the pulp inlet 121, and the cover plate 16 is provided with a flow hole (not shown) for communicating the mechanical stirring cavity 123 and the outside of the mechanical stirring cavity 123. It can be understood that the mineralized pulp containing mineralized bubbles in the mechanical stirring cavity 123 flows out to the mineralization tank 12 through the flow hole. The mechanical stirring device 1 of the embodiment of the present application improves the sealing of the mechanical stirring cavity 123 by arranging the cover plate 16 above the mineralization tank 12, which can prolong the time for the pulp to reflect, rectify and surge in the mechanical stirring cavity 123, so as to increase the contact time, contact frequency and impact frequency of the bubbles and target particles, thereby improving the mineralization and flotation effect. The mineralization effect is improved, and the pulp can flow out from the pulp inlet 121 of the mechanical stirring cavity 123 uniformly, the flow field disturbance formed by the rotation of the impeller is blocked by the cover plate 16, and the turbulence intensity in the lower region of the first froth zone 112 above the mechanical stirring cavity 123 is low, which is beneficial to the upward movement of the mineralized bubbles.

[0064] In other words, the pulp is more turbulent in the relatively closed and relatively small area of the mineralization tank 12 with the cover plate 16, the bubbles are finer and more likely to capture fine particles. The flow in the lower area of the first froth zone 112 above the mechanical stirring chamber 123 is more stable, the attached particles are more stable and less likely to fall off, the mineralization bubbles rise smoothly, and the efficiency is improved.

[0065] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first" and "second" are only for descriptive purposes and cannot 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" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0067] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, 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; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, 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.

[0069] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein to describe various embodiments and examples, and are not necessarily used consistently with respect to these terms throughout the specification. These terms are used to distinguish one element from another element.

[0070] Although the above-mentioned embodiments have been shown and described, it is to be understood that the above-mentioned embodiments are exemplary and are not to be construed as limiting the present application, and any changes, modifications, replacements, and variations made by those skilled in the art to the above-mentioned embodiments are within the scope of the present application.

Claims

1. A series multiple floatation apparatus, characterized by, The device comprises: a mechanical stirring device, which comprises a first tank, a mineralization tank, a rotor assembly and a bubble scraping assembly, the first tank is provided with a mechanical stirring area and a first bubble area, the first bubble area is arranged above the mechanical stirring area, the mineralization tank is arranged in the mechanical stirring area and has a mechanical stirring cavity, 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, and the bubble scraping assembly is arranged in the first bubble area; a column selection device, which comprises a second tank and an aeration device, the second tank is arranged outside the first tank, the second tank is provided with a column selection area and a second bubble area, the second bubble area is located above the column selection area, and the aeration device is communicated with the column selection area and used for charging gas into the column selection area to perform column selection on the ore pulp entering the column selection area; a first connecting pipeline, which is communicated with the mechanical stirring area and the column selection area and used for conveying the ore particles not attached to bubbles in the mechanical stirring area to the column selection area; a second connecting pipeline, which is communicated with the first bubble area and the second bubble area and used for conveying the mineralized bubbles in the second bubble area to the first bubble area.

2. The series multiple flotation device according to claim 1, characterized in that, The series multi-flotation device further comprises a first driving motor and a first auger shaft, the first auger shaft is arranged in the first connecting pipeline, and the first driving motor is connected with the first auger shaft to drive the ore pulp flowing in the first connecting pipeline. Alternatively, the second tank is located below the first tank, and the ore particles not attached to bubbles in the mechanical stirring area flow into the column selection area through the first connecting pipeline.

3. The series multiple flotation device according to claim 1, characterized in that, The series multi-flotation device further comprises a second driving motor and a second auger shaft, the second auger shaft is arranged in the second connecting pipeline, and the second driving motor is connected with the second auger shaft to drive the mineralized bubbles flowing in the second connecting pipeline. Alternatively, the second tank is located above the first tank, and the mineralized bubbles in the second bubble area flow into the first bubble area.

4. The series multiple flotation device according to claim 1, characterized in that, The series multi-flotation device further comprises a buffer tank, which is provided with a stirring device, and the buffer tank is connected in series on the first connecting pipeline.

5. The series multiple flotation device according to claim 1, characterized in that, The mechanical stirring devices are multiple, the multiple mechanical stirring devices are connected in series, and the mechanical stirring device located at the end of the series is connected with the second tank.

6. The series multiple flotation device of claim 1, wherein, The column selection devices are multiple, the multiple column selection devices are connected in series, and the column selection device located at the beginning of the series is connected with the first tank.

7. The series multiple flotation device of claim 1, wherein, The series multi-flotation device further comprises a pre-mineralization device, which is used for pre-mineralizing the ore pulp, the pre-mineralization device is arranged outside the first tank and communicated with a pulp outlet of the mechanical stirring cavity to supply the pre-mineralized ore pulp into the mechanical stirring cavity, and the pre-mineralization device is of a mechanical stirring type or an aeration mineralization type.

8. The series multiple flotation device according to any of claims 1 - 7, characterized in that, The rotor is an impeller, which comprises a hub, a disc, a top plate, a bottom plate and blades, the blades comprise upper blades and lower blades, the hub is installed at the lower end of the rotating shaft, the disc, the top plate and the bottom plate are installed on the hub and the disc is located between the top plate and the bottom plate, the upper blades and the lower blades are both multiple, the multiple upper blades are arranged between the upper surface of the disc and the top plate and are spaced along the circumference of the disc, the multiple lower blades are arranged between the lower surface of the disc and the disc and are spaced along the circumference of the disc, the upper blades and the lower blades are one-to-one corresponding or staggered along the circumference of the disc.

9. The series multiple flotation device according to any of claims 1 - 7, characterized in that, In the longitudinal section of the mineralization tank, the peripheral wall of the mineralization tank comprises multiple line segments which are sequentially connected, and the angles of adjacent line segments are different from each other.

10. The series multiple flotation device according to any of claims 1 - 7, characterized in that, The mechanical stirring device further comprises a cover plate arranged above the mineralization tank, wherein the cover plate is opposite to and spaced from the pulp inlet of the top surface of the mineralization tank, or the cover plate covers the pulp inlet and is provided with a flow hole for communication between the mechanical stirring cavity and the outside of the mechanical stirring cavity.

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