Confined range mineralization device and flotation equipment

Abstract

The utility model relates to a limited range mineralization device and flotation equipment. The limited range mineralization device comprises a mineralization tank, a cover plate and a rotor assembly. A mechanical stirring cavity is formed in the mineralization tank, a pulp inlet used for supplying pulp into the mechanical stirring cavity is formed in the mineralization tank, the top face of the mineralization tank is open to form a top opening, the cover plate is located above the top opening, and a gap is formed between the cover plate and the top face of the mineralization tank. And / or the cover plate is installed on the top face of the mineralization tank to cover the top opening, the cover plate is provided with a cover plate through hole, the cover plate and the mineralization tank define a limited mineralization area including the mechanical stirring cavity, the rotor assembly comprises a rotating shaft and a rotor, and the lower end of the rotating shaft penetrates through the cover plate and extends into the mechanical stirring cavity; the rotor is mounted at the lower end of the rotating shaft and positioned in the mechanical stirring cavity. The confinement mineralization device can improve mineralization and flotation effects.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flotation, specifically, a limited mineralization device and a flotation equipment. BACKGROUND

[0002] Flotation is a widely used mineral processing method. When using a flotation device for flotation, ore pulp is fed into a flotation tank and mechanically stirred while being supplied with air, and target particles in the ore pulp selectively adhere to bubbles to form mineralized bubbles to achieve mineralization. Mineralized bubbles float upwards, and other particles that do not adhere to the bubbles are discharged with the slurry from the bottom of the flotation tank, thereby achieving the purpose of separating minerals. However, the related art has problems of poor mineralization effect and low flotation efficiency, and there is a need for improvement. SUMMARY

[0003] The present utility model is based on the inventor's discovery and understanding of the following problems and their causes.

[0004] In the related art, mineralization is carried out in a mineralization tank of a flotation device, and ore pulp is fed from the outside into the mineralization tank and mineralized under the action of air supply and mechanical stirring. However, the inventor has found that due to the large space in the mineralization tank, the mineralization and flotation effects are poor and the flotation efficiency is low. Therefore, the related art proposes to set a parabolic-shaped basin-shaped reflection bottom in the mineralization tank, and the ore pulp and gas are supplied into the reflection bottom, and mechanical stirring is carried out in the reflection bottom to achieve bubble mineralization. The reflection bottom reflects the ore pulp containing mineralized bubbles out of the reflection bottom to improve the flotation efficiency, but the inventor has found that there are still problems of poor mineralization and flotation effects and low efficiency. The inventor has found through research that, compared with mineralization in the mineralization tank, the reflection action of the reflection bottom can improve the flotation efficiency to some 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.

[0005] In order to further improve the mineralization and flotation effect, improve the flotation efficiency, the inventor puts forward the scheme of limited mineralization, the so-called limited mineralization refers to the mineralization and related technology in the relatively closed and relatively small limited space, the limited space can also be called limited space, limited area, limited area or limited area, simply called limited domain, for example, the limited domain is smaller than the mineralization tank cavity in the related technology and relatively closed, compared with the open parabolic reflection bottom in the related technology, the mineralization process, the ore pulp and gas are introduced 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 repeatedly reflect, stir and collide in the limited space, the contact time, contact frequency and impact frequency of the air bubbles and the target particles are improved, thereby improving the mineralization and flotation effect, and further improving the efficiency, therefore, the mineralization carried out in the limited space can be called limited mineralization.

[0006] The limited mineralization device provided by the embodiment of the utility model includes: mineralization tank, the mineralization tank has mechanical stirring cavity in it, the mineralization tank is equipped with the inlet of slurry for supplying the ore pulp to the mechanical stirring cavity, the top surface of the mineralization tank is open to form the top opening, the cover plate is located above the top opening and has a gap with the top surface of the mineralization tank, and / or the cover plate is installed on the top surface of the mineralization tank to cover the top opening, and the cover plate is equipped with cover plate through hole, the cover plate and the mineralization tank define the limited mineralization area including the mechanical stirring cavity, the gap and / or the cover plate through hole constitute the outlet of slurry for discharging the ore pulp from the mechanical stirring cavity, the rotor assembly includes the rotating shaft and the rotor, the lower end of the rotating shaft penetrates the cover plate and extends into the mechanical stirring cavity, the rotor is located in the mechanical stirring cavity, and the rotor is installed on the lower end of the rotating shaft and is driven to rotate by the rotating shaft to stir the ore pulp in the mechanical stirring cavity.

[0007] According to the limited mineralization device provided by the embodiment of the utility model, the ore pulp is introduced into the mineralization tank along the direction from bottom to top through the inlet of slurry, and the rotor rotates and stirs in the mechanical stirring cavity, thereby mineralizing the air bubbles generated by mechanical stirring and forming mineralized air bubbles, the cover plate and the mineralization tank define the limited mineralization area or mineralization space including the mechanical stirring cavity, thereby the time of reflection, rectification and turbulence of the ore pulp and air bubbles in the mechanical stirring cavity can be prolonged, so as to improve the contact time, contact frequency and impact frequency of the air bubbles and the target particles, thereby improving the mineralization and flotation effect, and further improving the mineralization and flotation efficiency of the limited mineralization device.

[0008] In some embodiments, the area of the top opening is smaller than the maximum cross-sectional area of the mineralization tank.

[0009] In some embodiments, the pulp inlet is arranged at a lower portion of the mineralization tank and adjacent to a bottom surface of the mineralization tank or the pulp inlet is arranged on the bottom surface of the mineralization tank.

[0010] In some embodiments, in a longitudinal section of the mineralization tank, the peripheral wall of the mineralization tank comprises a plurality of line segments connected in sequence, and the angles of adjacent line segments are different from each other.

[0011] In some embodiments, the number of the line segments is proportional to the area of the through hole of the cover plate.

[0012] In some embodiments, the mechanical stirring cavity is in a cylindrical shape or comprises a cylindrical segment and a tapered segment connected to a lower end of the cylindrical segment and gradually tapered from top to bottom.

[0013] In some embodiments, the mechanical stirring cavity is in a spherical segment shape or an ellipsoidal segment shape.

[0014] In some embodiments, when the mechanical stirring cavity is in a spherical segment shape, the cover plate is located above the center of the spherical segment; when the mechanical stirring cavity is in an ellipsoidal segment shape, the short axis of the mechanical stirring cavity extends in the vertical direction, the long axis of the mechanical stirring cavity extends in the horizontal direction, and the cover plate is located above the long axis.

[0015] In some embodiments, the rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring cavity.

[0016] In some embodiments, the rotor comprises a disc and a plurality of blades, the disc is installed at a lower end of the rotating shaft, the plurality of blades are arranged at an outer periphery of the disc in a circumferential direction of the disc, in a longitudinal section of the rotor, a profile line of an outer side surface of the blade comprises a vertical segment and an arc segment, an upper end of the arc segment is connected to a lower end of the vertical segment and gradually extends inward.

[0017] In some embodiments, the blade is provided with a hollow hole penetrating through a thickness direction of the blade.

[0018] In some embodiments, the rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring cavity, the rotor is provided with a gas injection channel and a gas injection hole, and the gas injection channel is in communication with the gas supply channel and the gas injection hole.

[0019] In some embodiments, the gas injection channel is arranged in the disc and the gas injection hole is arranged on an outer peripheral surface of the disc; and / or, the gas injection channel is arranged in the disc and the blade and the gas injection hole is arranged on at least one of the outer peripheral surface of the disc and the blade.

[0020] In some embodiments, a plurality of turbulence enhancement plates are arranged in the mechanical stirring cavity, and the turbulence enhancement plates are connected to the inner wall of the mechanical stirring cavity.

[0021] In some embodiments, the rotor is an impeller, the outer diameter of the impeller is A, the gap between the outer periphery 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.

[0022] The flotation equipment provided in the embodiments of the present application comprises: a limited mineralization device, which is the limited mineralization device described in any one of the embodiments of the present application; a tank body, wherein the limited mineralization device is arranged in the tank body; and a driving device, which is arranged above the tank body and connected with the rotating shaft to drive the rotating shaft to rotate.

[0023] According to the flotation equipment provided in the embodiments of the present application, the ore pulp is introduced into the mineralization tank through the ore pulp inlet in the downward direction, the rotor rotates and stirs in the mechanical stirring cavity, air is dispersed into small bubbles, target particles adhere to the bubbles to form mineralized bubbles, the cover plate and the mineralization tank define a limited mineralization area including the mechanical stirring cavity, and thus the time for the ore pulp to reflect, rectify and surge in the mechanical stirring cavity can be prolonged, the contact time, contact and collision times of the bubbles and the target particles are increased, and thus the mineralization and flotation effects are improved, and the mineralization and flotation efficiency of the flotation equipment is improved.

[0024] In some embodiments, the tank body has a lower region, an upper region and a communication region, the lower region is located below the mineralization tank, the upper region is located above the mineralization tank, and the communication region is located between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the tank body, the mineralized bubbles in the ore pulp discharged from the mechanical stirring cavity enter the upper region, and the ore pulp containing other particles enters the lower region through the communication region and is discharged from the lower region.

[0025] In some embodiments, the flotation equipment further comprises an aeration device, the tank body has an upper region and a column selection region, the upper region is located above the mineralization tank, the column selection region comprises a lower region and a communication region, the lower region is located below the mineralization tank, and the communication region is located between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the tank body, the aeration device is in communication with the lower region and is used for aerating the lower region to perform column selection on the ore pulp entering the column selection region from the mechanical stirring cavity. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the flotation equipment provided in the embodiments of the present application.

[0027] Figure 2 This is a schematic diagram of a flotation device according to another embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of a flotation device according to another embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of a flotation device according to another embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of a flotation device according to another embodiment of the present invention.

[0031] Figure 6 This is a longitudinal cross-sectional schematic diagram of the confined mineralization device according to an embodiment of the present invention.

[0032] Figure 7 This is a longitudinal cross-sectional schematic diagram of a confined mineralization device according to another embodiment of the present invention.

[0033] Figure 8 This is a partial cross-sectional schematic diagram of a confined mineralization device according to another embodiment of the present invention.

[0034] Figure 9 This is a longitudinal cross-sectional schematic diagram of the mineralization tank and cover plate of the confined mineralization device according to an embodiment of the present invention.

[0035] Figure 10 This is a longitudinal cross-sectional schematic diagram of the mineralization tank and cover plate of the confined mineralization device according to another embodiment of the present invention.

[0036] Figure 11 This is a schematic diagram of the rotor of the confined mineralization device according to an embodiment of the present invention.

[0037] Figure 12 This is a partial cross-sectional schematic diagram of the rotor of the confined mineralization device according to an embodiment of the present invention.

[0038] Figure 13 This is a schematic diagram of the rotor of a confined mineralization device according to another embodiment of the present invention.

[0039] Figure label:

[0040] 1. Mineralization tank; 11. Slurry inlet; 12. Top opening; 13. Mechanical stirring chamber; 131. Cylindrical section; 132. Conical section; 14. Linear section; 15. Turbulence reinforcement plate;

[0041] 2. Rotor assembly; 21. Shaft; 211. Air supply channel; 22. Rotor; 221. Hub; 222. Disc; 2220. Jet channel; 223. Blade; 2231. Upper blade; 2232. Lower blade; 2233. Hollowed-out hole; 2234. Vertical section; 2235. Arc-shaped section; 224. Top plate; 225. Bottom plate;

[0042] 31. Cover plate; 311. Cover plate through hole; 32. Feed pipe; 33. Pre-mineralization device; 34. Turbulence suppression grid; 35. Drive device;

[0043] 4. Tank body; 41. Column sorting area; 411. Lower area; 412. Connecting area; 42. Upper area; 43. Discharge port;

[0044] 5. Inflation device. Detailed Implementation

[0045] 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.

[0046] The following is a reference appendix. Figures 1 to 13 This invention describes a confined mineralization apparatus and a flotation device having the confined mineralization apparatus according to embodiments of the present invention.

[0047] like Figures 1 to 7 As shown, the confined mineralization device of this utility model embodiment includes: a mineralization tank 1, a cover plate 31, and a rotor assembly 2. The mineralization tank 1 has a mechanical stirring chamber 13, which is used to mineralize the bubbles generated by mechanical stirring. This is referred to as mechanical stirring mineralization, that is, under the stirring action of the rotor assembly 2, the particles in the slurry adhere to the bubbles to form mineralized bubbles. The mineralization tank 1 is provided with an inlet 11 for supplying slurry into the mechanical stirring chamber 13, and the top surface of the mineralization tank 1 is open to form a top opening 12.

[0048] The cover plate 31 is located above the top opening 12 and has a gap between it and the top surface of the mineralization tank 1, and / or the cover plate 31 is installed on the top surface of the mineralization tank 1 to cover the top opening 12 and the cover plate 31 is provided with a cover plate through hole 311. The cover plate 31 and the mineralization tank 1 define a confined mineralization area including the mechanical stirring chamber 13. The gap and / or the cover plate through hole 311 constitute a slurry outlet for discharging slurry from the mechanical stirring chamber 13.

[0049] It is understandable that, such as Figure 1 As shown, in the embodiment where "the cover plate 31 is located above the top opening 12 and has a gap between it and the top surface of the mineralization tank 1," this gap constitutes a slurry outlet for discharging slurry from the mechanical stirring chamber 13. Figure 7In the embodiment shown, in which the cover plate 31 is mounted on the top surface of the mineralization tank 1 to cover the top opening 12 and the cover plate 31 is provided with a cover plate through hole 311, the cover plate through hole 311 constitutes a pulp discharge port for discharging the pulp from the mechanical stirring cavity 13. Of course, in the case where there is a gap between the cover plate and the top surface of the mineralization tank, the cover plate hole can also be provided on the cover plate. The above-mentioned embodiments can be selected according to specific applications.

[0050] The pulp discharged from the pulp discharge port includes target particles (particles attached to bubbles) and other particles (particles not attached to bubbles).

[0051] 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 through the cover plate 31, and the rotor 22 is located in the mechanical stirring cavity 13, the rotor 22 is mounted on the lower end of the rotating shaft 21 and is driven to rotate by the rotating shaft 21 to stir the pulp in the mechanical stirring cavity 13.

[0052] The air used for mineralization can be supplied into the mechanical stirring cavity 13 through the rotating shaft 21, and of course, a separate air supply pipeline can also be provided to supply air into the mechanical stirring cavity 13.

[0053] According to the limited mineralization device of the embodiment of the present application, the pulp is introduced into the mineralization tank 1 through the pulp inlet 11 in the direction from bottom to top, the rotor 22 rotates to stir in the mechanical stirring cavity 13, the air is dispersed into small bubbles, the target particles are attached to the bubbles to form mineralized bubbles, and the cover plate 31 and the mineralization tank 1 define a limited mineralization area including the mechanical stirring cavity 13, thereby prolonging the time of the pulp reflecting, rectifying and surging in the mechanical stirring cavity 13, to increase the contact time, contact and impact times of the bubbles and the target particles, thereby improving the mineralization and flotation effect, and further improving the mineralization and flotation efficiency of the limited mineralization device.

[0054] It can be understood that the limited mineralization device of the embodiment of the present application improves the sealing of the mechanical stirring cavity 13 by providing the cover plate 31 on the upper side of the mechanical stirring cavity 13, can prolong the time of the pulp reflecting, rectifying and surging in the mechanical stirring cavity 13, to increase the contact time, contact times and impact times of the bubbles and the target particles, thereby improving the mineralization and flotation effect. And the flow field disturbance formed by the rotation of the rotor 22 is blocked by the cover plate 31, so that the turbulence intensity in the lower side of the upper area 42 above the mechanical stirring cavity 13 is low, which is beneficial to the upward movement of the mineralized bubbles.

[0055] In other words, the pulp is more turbulent in the relatively closed and relatively small area with the cover plate 31, the bubbles are smaller, and the fine particles are more easily captured. The mineralized bubbles flow more smoothly on the lower side of the upper area 42 above the mechanical stirring cavity 13, the attached particles are more stable and not easy to fall off.

[0056] It can be understood that mineralization refers to a selective adhesion process of target particles to bubbles. After mineralization, the slurry includes mineralized bubbles (the mineralized bubbles can be referred to as mineralized froth after aggregation, and the mineralized bubbles and the mineralized froth can be used interchangeably in the following description) and other particles that are not attached to the bubbles. The mineralized bubbles are target particles attached to the bubbles. Here, the target particles attached to the bubbles can also be referred to as mineralized particles. The other particles can include target particles not attached to the bubbles, non-target mineral particles not attached to the bubbles, and tailing particles.

[0057] Optionally, as shown in Figure 9 and Figure 10 , the area of the top opening 12 is smaller than the maximum cross-sectional area of the mineralization tank 1. It can be understood that the top opening 12 of the mineralization tank 1 is arranged in a gradually tapered manner. For example, the cross-sectional area of the mechanical stirring cavity 13 at a middle position of the mineralization tank 1 is larger than the area of the top opening 12.

[0058] When the rotor 22 rotates, the slurry can flow upward along the inner wall of the mineralization tank 1. Due to the gradually tapered arrangement of the top opening 12 of the mineralization tank 1, a part of the upward flowing slurry can be folded back into the mechanical stirring cavity 13 for re-mineralization. Thus, the reflection, rectification and turbulence time of the slurry in the mechanical stirring cavity 13 can be prolonged, so as to increase the contact time, contact and impact times of the bubbles and the target particles, thereby improving the mineralization and flotation effect.

[0059] In some embodiments, the slurry inlet 11 is arranged at a lower portion of the mineralization tank 1 adjacent to the bottom surface of the mineralization tank 1 or on the bottom surface of the mineralization tank 1. It can be understood that the bottom wall surface of the mineralization tank 1 is opened to form the slurry inlet 11. Alternatively, the slurry inlet 11 can also be arranged on the side wall of the mineralization tank 1 adjacent to the bottom.

[0060] In some examples, as shown in Figures 1 to 4 , the slurry inlet 11 is arranged on the bottom wall surface of the mineralization tank 1. For example, the slurry inlet 11 is arranged opposite to the bottom surface of the rotor 22, so that the slurry can be further dispersed by the rotor 22, so as to increase the turbulence intensity of the slurry in the mineralization tank 1.

[0061] In other examples, the slurry inlet 11 is arranged on the side wall of the mineralization tank 1 adjacent to the bottom of the mineralization tank 1, so that the upward impact force of the slurry can be reduced, so as to prolong the mineralization time of the slurry in the mineralization tank 1 and improve the mineralization effect.

[0062] In some embodiments, as shown in Figure 1 and Figure 7 , in the longitudinal cross section of the mineralization tank 1, that is, along the axial direction of the mineralization tank 1, Figure 1Within the cross-section of the mineralization tank 1 (in the vertical direction), the peripheral wall of the mineralization tank 1 comprises multiple line segments 14 connected in sequence, and the inclination angles of adjacent line segments 14 are different from each other. In other words, the peripheral wall of the mineralization tank 1 is not arc-shaped, but is composed of multiple straight line segments 14, and the inclination angles of different peripheral wall parts are different.

[0063] Because the inclination angles α of adjacent line segments 14 are different, that is, the inclination angles of different parts of the peripheral wall of the mineralization tank 1 are different, the angles at which the slurry reflected by different peripheral wall parts are different. Compared with the arc-shaped peripheral wall, the collision effect between the slurry flows reflected by the peripheral wall parts with different inclination angles within the mineralization tank 1 is enhanced, thereby increasing the turbulence generated in the mineralization tank 1, reducing the weak mineralization area, further increasing the generation of bubbles and the probability of adhesion to particles, thus improving the mineralization effect, and reducing local wear of the mineralization tank 1. Therefore, the confined mineralization device of this utility model embodiment can form a strong turbulent flow field within the mechanical stirring chamber 13, reduce the weak mineralization area, improve the mineralization effect, and reduce local wear of the mineralization tank 1. Furthermore, by changing the inclination angles of different peripheral wall parts, it can adapt to different slurries, improving its applicability.

[0064] For example, such as Figures 1 to 4 As shown, the cross-sectional area of ​​the mechanical stirring chamber 13 gradually decreases from top to bottom, and the mineralization tank 1 can have a generally segmented basin-shaped structure. The segmented basin-shaped mechanical stirring chamber 13 can provide reflective forces in multiple directions for the slurry stirred by the rotor 22, thereby enhancing the collision effect of the slurry flow, increasing the turbulence intensity, and improving the mineralization effect.

[0065] Compared to the open reflective bottoms with parabolic or arc-shaped structures in related technologies, the mineralization tank 1 of the mineralization device in this embodiment is easier to process and obtain multiple reflection focal points. In other words, the mineralization tank 1 in this embodiment is more likely to achieve multiple reflection focal points close to the theoretical design, improving the practical application effect. For mineralization tanks 1 of different sizes, by adjusting the number and inclination angle of line segments 14 in the longitudinal section of the mineralization tank 1, a scheme close to the theoretical focal points can still be obtained, making it easier to realize the theoretical flow field model, that is, folding and surging along the inner wall of the mineralization tank 1 in multiple directions, thereby forming a strong turbulent flow field. The mineralization tank 1 in this embodiment can strengthen the overall mineralization and reduce the weak mineralization area in the mechanical stirring chamber 13, reducing the situation of excessive local wear of the mineralization tank 1.

[0066] Optionally, the number of the line segments 14 is proportional to the area of the cover plate through hole 311. It should be noted that when the cover plate through hole 311 is multiple, the number of the line segments 14 is proportional to the sum of the areas of the multiple cover plate through holes 311. When the area of the cover plate through hole 311 is larger, the number of the line segments 14 is more, 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 demand of the mineralization device and improve the mineralization effect.

[0067] In some embodiments, as shown in Figure 4 and Figure 6 , the mechanical stirring cavity 13 is cylindrical or includes a cylindrical segment 131 and a tapered segment 132 connected to the lower end of the cylindrical segment 131 and gradually tapered from top to bottom. Since the mechanical stirring cavity 13 is in a cylindrical structure, the horizontal 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 fine particle minerals, the energy dissipation can be lower, or the mineralization kinetic energy is sufficient under the same energy, and it is easier to form micro bubbles.

[0068] As shown in Figure 6 , for example, when the mechanical stirring cavity 13 is cylindrical, the bottom surface of the mineralization tank 1 is a plane, i.e. the mineralization tank 1 is a regular cylindrical structure.

[0069] As shown in Figure 4 , for another example, when the mechanical stirring cavity 13 includes the cylindrical segment 131 and the tapered segment 132, the bottom surface of the mineralization tank 1 is a tapered surface.

[0070] In some embodiments, as shown in Figure 9 and Figure 10 , the mechanical stirring cavity 13 is in a spherical segment shape or an ellipsoidal segment shape. The "spherical segment shape" means that a notch is arranged at the upper end of a sphere to form the top opening 12. In the longitudinal section of the mechanical stirring cavity 13 in the spherical segment shape, the profile of the mechanical stirring cavity 13 is a regular circular profile with the upper end flush. The "ellipsoidal segment shape" means that a notch is arranged at the upper end of an ellipsoid to form the top opening 12. In the longitudinal section of the mechanical stirring cavity 13 in the ellipsoidal segment shape, the profile of the mechanical stirring cavity 13 is an elliptical profile with the upper end flush.

[0071] The limited mineralization device of the embodiment of the utility model forms a strong turbulent flow field by arranging the mechanical stirring cavity 13 in the above structure so that the ore pulp can be folded and churned multiple times along the inner wall of the mineralization tank 1. The mineralization tank 1 of the embodiment of the utility model can strengthen the overall mineralization and reduce the weak mineralization area in the mechanical stirring cavity 13, thereby reducing the local excessive wear of the mineralization tank 1.

[0072] Optionally, as shown in Figure 9As shown, when the mechanical stirring cavity 13 is in the shape of a spherical segment, the cover plate 31 is located above the spherical center O1 of the mechanical stirring cavity 13. The limited mineralization device of the embodiment of the present application sets the mechanical stirring cavity 13 to the above structure, so that part of the upward flowing ore pulp can be turned back into the mechanical stirring cavity 13 for re-mineralization and mechanical stirring, thereby prolonging the time of reflection, rectification and turbulence of the ore pulp in the mechanical stirring cavity 13, to increase the contact time, contact and impact times of the bubbles and target particles, thereby improving the mineralization and flotation effect.

[0073] Optionally, as shown in Figure 10 As shown, when the mechanical stirring cavity 13 is in the shape of an ellipsoidal segment, the short axis L2 of the mechanical stirring cavity 13 extends in the up-down direction, the long axis L1 of the mechanical stirring cavity 13 extends in the horizontal direction, and the cover plate 31 is located above the long axis L1. The limited mineralization device of the embodiment of the present application sets the mechanical stirring cavity 13 to the above structure, so that part of the upward flowing ore pulp can be turned back into the mechanical stirring cavity 13 for re-mineralization and mechanical stirring, thereby prolonging the time of reflection, rectification and turbulence of the ore pulp in the mechanical stirring cavity 13, to increase the contact time, contact and impact times of the bubbles and target particles, thereby improving the mineralization and flotation effect.

[0074] In some embodiments, as shown in Figure 1 As shown, the rotating shaft 21 is provided with a gas supply passage 211 for supplying gas into the mechanical stirring cavity 13. It can be understood that the gas in the mechanical stirring cavity 13 can be supplied through the gas supply passage 211 in the rotating shaft 21, so that the rotating shaft 21 can not only drive the rotor 22 to rotate, but also provide mineralization gas for the mechanical stirring cavity 13, and the structure is compact, reducing the number of parts used.

[0075] In other examples, the limited mineralization device can also fill mineralization gas into the mechanical stirring cavity 13 through a pipeline at the ore pulp inlet 11 position of the mineralization tank 1, and of course the gas can also be introduced into the mechanical stirring cavity 13 by self-suction.

[0076] In some embodiments, as shown in Figure 8 , Figure 11 and Figure 12 As shown, the rotor 22 is in the form of an impeller. The impeller includes a hub 221, a disc 222, a top plate 224, a bottom plate 225 and blades 223, and the blades 223 include upper blades 2231 and lower blades 2232.

[0077] The hub 221 is installed at the lower end of the rotating shaft 21, and the wheel disc 222, the top plate 224 and the bottom plate 225 are installed on the hub 221 and the wheel disc 222 is located between the top plate 224 and the bottom plate 225. The upper blades 2231 and the lower blades 2232 are both multiple, the multiple upper blades 2231 are arranged between the upper surface of the wheel disc 222 and the top plate 224 and are spaced along the circumference of the wheel disc 222. The multiple lower blades 2232 are arranged between the lower surface of the wheel disc 222 and the wheel disc 222 and are spaced along the circumference of the wheel disc 222. The upper blades 2231 and the lower blades 2232 are one-to-one corresponding or staggered along the circumference of the wheel disc 222. Preferably, the upper blades 2231 and the lower blades 2232 are staggered, that is, the upper blades 2231 and the lower blades 2232 are not aligned with each other along the axial direction of the impeller.

[0078] When the impeller rotates, the upper blades 2231 on the upper side of the wheel disc 222 and the lower blades 2232 on the lower side of the wheel disc 222 rotate at the same time, which can enhance the pulp suction capacity (the capacity of the pulp from the pulp inlet 11 to the mechanical stirring chamber 13) and the strength of the internal pulp circulation, improve the mineralization effect and enhance the selectivity in the flotation process.

[0079] For example, the upper blades 2231 and the lower blades 2232 are distributed in a radial and radiating manner, and the number of the upper blades 2231 and the lower blades 2232 is between 4-16 and is uniformly arranged. It should be noted that the number of the upper blades 2231 and the lower blades 2232 can be equal or not equal, which is not limited in the embodiments of the present application.

[0080] 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, which is beneficial to enhance the capturing effect of the bubbles on the target particles and enhance the selectivity in the flotation process.

[0081] For example, the outer contour of the top plate 224 is substantially consistent with the size of the outer contour surrounded by the multiple upper blades 2231. The outer contour of the bottom plate 225 is substantially consistent with the size of the outer contour surrounded by the multiple lower blades 2232.

[0082] In some embodiments, as Figure 13As shown, the rotor 22 comprises a wheel disc 222 mounted at the lower end of the rotating shaft 21 and a plurality of blades 223 arranged at the outer periphery of the wheel disc 222 in the circumferential direction. In the longitudinal section of the rotor 22, the profile line of the outer side surface of the blade 223 comprises a vertical segment 2234 and an arc segment 2235, and the upper end of the arc segment 2235 is connected to the lower end of the vertical segment 2234 and gradually extends inward. Thus, when the rotor 22 rotates, the region of the stirred ore pulp is turned upward along the arc segment 2235. The limited mineralization device of the embodiment of the present application can improve the turbulent flow effect of the reinforced ore pulp in the mechanical stirring cavity 13, enhance the capturing effect of the bubbles on the target particles, enhance the strength of the internal ore pulp circulation, and improve the energy utilization rate of the impeller rotation, by arranging the blade 223 in the above structure.

[0083] In some embodiments, as shown in Figure 13 The blade 223 is provided with a hollow hole 2233 penetrating through the thickness direction thereof. The blade 223 of the limited mineralization device of the embodiment of the present application is designed as a hollow structure, which is more likely to generate tiny bubbles when the impeller rotates, so that the circulation and mixing effect of the ore pulp and the bubbles is better, and the mineralization of the fine-grained minerals is more favorable.

[0084] For example, the hollow hole 2233 can be a strip-shaped hole or a circular hole. The strip-shaped hole can extend obliquely, horizontally or vertically. The hollow hole 2233 can be multiple, and the multiple hollow holes 2233 are arranged discretely.

[0085] In some embodiments, as shown in Figure 13 The rotating shaft 21 is provided with a gas supply passage 211 for supplying gas into the mechanical stirring cavity 13, and the rotor 22 is provided with a gas injection passage 2220 and a gas injection hole, and the gas injection passage 2220 is in communication with the gas supply passage and the gas injection hole. The mixing degree of the ore pulp and the bubbles can be improved, and the mineralization effect of the limited mineralization device can be improved.

[0086] For example, as shown in Figure 13 The gas injection passage 2220 is arranged in the wheel disc 222, and the gas injection hole is arranged on the outer peripheral surface of the wheel disc 222. For another example, the gas injection passage 2220 is arranged in the wheel disc 222 and the blade 223, and the gas injection hole is arranged on at least one of the outer peripheral surface of the wheel disc 222 and the blade 223. Since the gas injection outlets of the gas injection passage 2220 in the wheel disc 222 are formed on the outer peripheral surface of the wheel disc 222 or the blade 223 and arranged in the circumferential direction of the wheel disc 222, the mixing degree of the ore pulp and the bubbles can be improved, and the mineralization effect of the limited mineralization device can be improved.

[0087] In some embodiments, as shown in Figure 7 and Figure 8As shown, the mechanical stirring cavity 13 is provided with a plurality of turbulence enhancement plates 15, the plurality of turbulence enhancement plates 15 are arranged along the circumference of the mechanical stirring cavity 13, the turbulence enhancement plates 15 are connected with the inner wall of the mechanical stirring cavity 13 and surround the rotor 22. When the rotor 22 rotates, because the plurality of turbulence enhancement plates 15 are arranged along the circumference of the mechanical stirring cavity 13, the ore pulp flowing along the circumference in the mechanical stirring cavity 13 is stopped and collided by the plurality of turbulence enhancement plates 15, the turbulence effect of the ore pulp in the mechanical stirring cavity 13 is improved, and the mineralization effect is improved.

[0088] Optionally, as shown, Figure 7 As shown, the rotor 22 is in the form of an impeller, the outer diameter of the impeller is A, and the gap between the outer side of the impeller and the inner side of the turbulence enhancement plate 15 in the radial direction of the rotating shaft 21 is B, wherein 0.03A≤B≤0.2A. In other words, the gap between the impeller and the inner side of the turbulence enhancement plate 15 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. The inventors of the present embodiment have found through research and experiments that when the impeller and the turbulence enhancement plate 15 adopt the above structural parameters, it is easier to generate micro-bubbles during the mineralization of the ore pulp, and the circulating mixing effect is better, which is more conducive to the mineralization of fine-grained minerals.

[0089] As shown, Figures 1 to 5 The flotation equipment of the present embodiment comprises a limited mineralization device, a tank body 4, and a driving device 35. The limited mineralization device is the limited mineralization device described above, the limited mineralization device is arranged in the tank body 4, and the driving device 35 is arranged above the tank body 4 and connected with the rotating shaft 21 to drive the rotating shaft 21 to rotate.

[0090] According to the flotation equipment of the present embodiment, the ore pulp is introduced into the mineralization tank 1 through the ore pulp inlet 11 in the direction from bottom to top, the rotor 22 rotates and stirs in the mechanical stirring cavity 13, the air is dispersed into micro-bubbles, the target particles are attached to the bubbles to form mineralized bubbles, and the cover plate 31 and the mineralization tank 1 define a limited mineralization area including the mechanical stirring cavity 13, thereby prolonging the time of reflection, rectification, and turbulence of the ore pulp in the mechanical stirring cavity 13, to increase the contact time, contact, and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effect, and further improving the mineralization and flotation efficiency of the flotation equipment.

[0091] Specifically, the driving device 35 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.

[0092] The bottom of the tank body 4 can be in any shape such as conical (funnel-shaped), prismatic, or wedge-shaped, to guide the tailings, thereby improving the efficiency of discharging the tailings from the discharge port 43.

[0093] In some embodiments, as shown in Figure 3 The tank body 4 has a lower region 411, an upper region 42 and a communication region 412, the lower region 411 is below the mineralization tank 1, the upper region 42 is above the mineralization tank 1, and the communication region 412 is between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4. The mineralized bubbles in the slurry discharged from the mechanical stirring cavity 13 enter the upper region 42, and the slurry containing other particles enter the lower region 411 through the communication region 412 and are discharged from the lower region 411 (i.e. the discharge port 43 at the bottom of the tank body 4).

[0094] It can be understood that the flotation device of the embodiment of the utility model can be used as a mechanical stirring mineralization flotation device. When the flotation device works, the mineralized bubbles in the slurry discharged from the mechanical stirring cavity 13 enter the upper region 42, and the slurry containing other particles (i.e. tailings) directly enter the lower region 411 through the communication region 412 and are discharged from the discharge port 43 at the bottom of the tank body 4.

[0095] In some embodiments, as shown in Figures 1 to 5 The flotation device further comprises an aeration device 5, and the tank body 4 has an upper region 42 and a column selection region, the upper region 42 is above the mineralization tank 1, and the column selection region comprises a lower region 411 and a communication region 412, the lower region 411 is below the mineralization tank 1, and the communication region 412 is between the outer peripheral wall of the mineralization tank 1 and the inner peripheral wall of the tank body 4. The aeration device 5 is in communication with the lower region 411 and is used for aerating the lower region 411 to perform column selection on the slurry entering the column selection region from the mechanical stirring cavity 13 in the column selection region.

[0096] The mineralized bubbles flow out of the slurry outlet of the mineralization tank 1 and flow upward to the upper region 42. Other particles not attached to the bubbles can flow out of the slurry outlet of the mineralization tank 1 and enter the lower region 411 through the communication region 412 under the action of gravity. Under the action of the aeration device 5, column selection can be performed in the lower region 411. The mineralized bubbles after column selection flow upward to the upper region 42 through the communication region 412. The tailings fall to the bottom of the tank body 4 under the action of gravity and are discharged from the discharge port 43 to the outside of the tank body 4. It can be understood that the flotation device of the embodiment of the utility model mineralizes the bubbles by mechanical stirring combined with column selection to improve the mineralization and flotation effect of the flotation device.

[0097] In some embodiments, as shown in Figure 3As shown, the flotation device further comprises a pre-mineralization device 33 for pre-mineralizing the ore pulp, the pre-mineralization device 33 is arranged outside the tank body 4 and in communication with the pulp inlet 11 of the mechanical stirring chamber 13 to supply the pre-mineralized ore pulp into the mechanical stirring chamber 13, the pre-mineralization device 33 can be a mechanical stirring mineralization type or an aeration mineralization type. It can be understood that when the flotation device is mineralizing the ore pulp, the ore pulp is pre-mineralized by the pre-mineralization device 33 first, and then the pre-mineralized ore pulp is supplied into the mineralization tank 1 through the feeding pipe 32 for mechanical stirring mineralization, and then enters the lower region 411 for column selection. In this way, the mineralization effect can be further improved, which is particularly beneficial to the mineralization of fine-grained minerals.

[0098] Optionally, as shown, Figure 2 The turbulence suppression grid 34 can be located in the lower side position of the upper region 42. The turbulence suppression grid 34 can suppress the turbulence intensity in the upper region 42, and improve the flotation effect.

[0099] Optionally, the position of the turbulence suppression grid 34 in the up-down direction is adjustable, so that the flotation device can adjust the turbulence suppression grid 34 to the appropriate position according to different flotation minerals or flotation effects, so as to expand the application range of the flotation device, and the turbulence suppression effect is better.

[0100] In the description of the present application, it should be understood that 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 indicate the orientation or positional relationship shown in the drawings, and are 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 referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0101] 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 "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0102] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0103] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be that first and second features directly contact, or first and second features indirectly contact through intermediate medium.Moreover, first feature "over", "above" and "on" second feature, can be that first feature is directly above or obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature "under", "below" and "under" second feature, can be that first feature is directly below or obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0104] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the 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 one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0105] 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 utility model, and the changes, modifications, replacements and variations of the above embodiments made by the ordinary skilled in the art are within the protection scope of the utility model.

Claims

1. A confined mineralization device, characterized in that, The application relates to a mineralization tank, which comprises: a mineralization tank with a mechanical stirring cavity in the tank, the tank being provided with a pulp inlet for feeding pulp into the mechanical stirring cavity, and the top surface of the tank being open to form a top opening; a cover plate, which is located above the top opening and has a gap with the top surface of the tank, and / or the cover plate is installed on the top surface of the tank to cover the top opening, and the cover plate is provided with a cover plate through hole, the cover plate and the tank defining a limited mineralization area including the mechanical stirring cavity, and the gap and / or the cover plate through hole constitute a pulp outlet for discharging pulp from the mechanical stirring cavity; a rotor assembly, which comprises a rotating shaft and a rotor, the lower end of the rotating shaft extending into the mechanical stirring cavity through the cover plate, and the rotor being located in the mechanical stirring cavity, the rotor being installed on the lower end of the rotating shaft and being driven to rotate by the rotating shaft to stir the pulp in the mechanical stirring cavity.

2. The confined mineralization device according to claim 1, characterized in that, The area of the top opening is smaller than the maximum cross-sectional area of the tank.

3. The confined mineralization device of claim 1, wherein, The pulp inlet is arranged at the lower part of the tank and adjacent to the bottom surface of the tank or on the bottom surface of the tank.

4. The confined mineralization device according to any one of claims 1 to 3, characterized in that, In the longitudinal section of the tank, the peripheral wall of the tank comprises a plurality of line segments which are sequentially connected, and the angles of adjacent line segments are different from each other.

5. The confined mineralization device according to claim 4, characterized in that, The number of the line segments is proportional to the area of the cover plate through hole.

6. The confined mineralization device according to any one of claims 1 to 3, wherein, The mechanical stirring cavity is in a cylindrical shape or comprises a cylindrical segment and a tapered segment which is connected to the lower end of the cylindrical segment and gradually tapers from top to bottom.

7. The confined mineralization device according to any one of claims 1 to 3, wherein, The mechanical stirring cavity is in a spherical segment shape or an ellipsoidal segment shape.

8. The confined mineralization device according to claim 7, characterized in that, When the mechanical stirring cavity is in a spherical segment shape, the cover plate is located above the center of the spherical segment. When the mechanical stirring cavity is in an ellipsoidal segment shape, the short axis of the mechanical stirring cavity extends in the up-down direction, the long axis of the mechanical stirring cavity extends in the horizontal direction, and the cover plate is located above the long axis.

9. The confined mineralization device of claim 1, wherein, The rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring cavity.

10. The confined mineralization device of claim 1, wherein, The rotor comprises a disc and a plurality of blades, the disc being installed on the lower end of the rotating shaft, and the plurality of blades are arranged at the outer periphery of the disc along the circumferential direction of the disc, in the longitudinal section of the rotor, the profile line of the outer side surface of the blade comprises a vertical segment and an arc segment, the upper end of the arc segment is connected to the lower end of the vertical segment and gradually extends inward.

11. The confined mineralization device according to claim 10, characterized in that, The blade is provided with a hollow hole which penetrates through the thickness direction of the blade.

12. The confined mineralization device of claim 10, wherein, The rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring cavity, and the rotor is provided with a gas injection channel and a gas injection hole, the gas injection channel being communicated with the gas supply channel and the gas injection hole.

13. The confined mineralization device of claim 12, wherein, The gas injection channel is arranged in the disc and the gas injection hole is arranged on the outer peripheral surface of the disc; and / or the gas injection channel is arranged in the disc and the blade and the gas injection hole is arranged on at least one of the outer peripheral surface of the disc and the blade.

14. The confined mineralization device of claim 10, wherein, 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 mechanical stirring cavity, and the turbulence enhancement plates are connected to the inner wall of the mechanical stirring cavity.

15. The confined mineralization device of claim 14, wherein, The rotor is an impeller, an outer diameter of the impeller is A, and a gap between an outer peripheral edge of the impeller and an inner side of the turbulence intensifier plate in a radial direction of the rotating shaft is B, wherein 0.03A≤B≤0.2A.

16. A flotation device characterized in that Comprise: The confined mineralization device is the confined mineralization device of any one of claims 1-15; The slot body, the confined mineralization device is arranged in the slot body; The driving device is arranged above the slot body and connected with the rotating shaft to drive the rotating shaft to rotate.

17. The flotation plant according to claim 16, characterized in that The slot body has a lower region, an upper region and a communication region, the lower region is below the mineralization tank, the upper region is above the mineralization tank, and the communication region is between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the slot body, the mineralization bubbles in the slurry discharged from the mechanical stirring cavity enter the upper region, and the slurry containing other particles enters the lower region through the communication region and is discharged from the lower region.

18. The flotation plant of claim 16, characterized in that, The flotation device further comprises an aeration device, the slot body has an upper region and a column selection region, the upper region is above the mineralization tank, the column selection region comprises a lower region and a communication region, the lower region is below the mineralization tank, and the communication region is between the outer peripheral wall of the mineralization tank and the inner peripheral wall of the slot body, the aeration device is communicated with the lower region and is used for aerating the lower region to perform column selection on the slurry entering the column selection region from the mechanical stirring cavity in the column selection region.

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