Confined range mineralization device and flotation equipment

Abstract

The invention relates to a confinement mineralization device and flotation equipment. The confinement 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 present invention relates to the field of flotation technology, in particular to a confined mineralization device and a flotation equipment. Background Art

[0002] Flotation is a widely used mineral processing method. When flotation equipment is used for flotation, the slurry is introduced into the flotation tank and mechanically stirred while supplying air. The target particles in the slurry selectively attach to the bubbles to form mineralized bubbles to achieve mineralization. The mineralized bubbles float up, and other particles that are not attached to the bubbles are discharged from the bottom of the flotation tank with the slurry, thereby achieving the purpose of separating minerals. However, there are problems in the related art such as poor mineralization effect and low flotation efficiency, and there is a need for improvement. Summary of the invention

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

[0004] In the related art, mineralization is carried out in the mineralization tank of the flotation equipment, and the slurry is introduced into the mineralization tank from the outside, and mineralization is carried out under the action of gas supply and mechanical stirring in the slurry. However, the inventors have found that due to the large space in the mineralization tank, the mineralization and flotation effects are poor and the flotation efficiency is not high. To this end, the related art proposes to set a parabolic basin-shaped reflection bottom in the mineralization tank, the slurry and gas are supplied into the reflection bottom, and mechanical stirring is carried out in the reflection bottom to achieve bubble mineralization. The reflection bottom reflects the slurry containing mineralized bubbles upward out of the reflection bottom to improve the flotation efficiency, but the inventors find that there are still problems of poor mineralization and flotation effects and low efficiency. The inventors have found through research that compared with mineralization in the mineralization tank, the flotation efficiency can be improved to a certain extent by the reflection effect of the reflection bottom, but because the top of the reflection bottom is open, the stirred slurry is quickly discharged from the reflection bottom under the reflection effect of the reflection bottom, and the residence time is short, thereby affecting the mineralization effect.

[0005] In order to further improve the mineralization and flotation effects and improve the flotation efficiency, the inventors proposed a scheme of confined mineralization. The so-called confined mineralization refers to the mineralization being carried out in a relatively closed and relatively narrow limited space compared with the related art. The limited space can also be called a confined space, a restricted area, a limited area or a restricted area, referred to as a confined area. For example, the confined area is smaller and relatively closed than the inner cavity of the mineralization tank in the related art, and is relatively closed compared with the open parabolic reflection bottom in the related art. During the mineralization process, the slurry and gas are introduced into the confined space, and mechanical stirring is carried out in the confined space, so that the air can form more bubbles. The bubbles and the target particles in the slurry are repeatedly reflected, stirred and collided with each other in the confined space, which increases the contact time, contact times and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effects, and then improving the efficiency. Therefore, in the present invention, the mineralization carried out in a confined space can be called confined mineralization.

[0006] The confined mineralization device of the embodiment of the present invention comprises: a mineralization trough, wherein the mineralization trough has a mechanical stirring chamber, the mineralization trough is provided with a slurry inlet for supplying slurry into the mechanical stirring chamber, and the top surface of the mineralization trough is open to form a top opening; a cover plate, wherein the cover plate is located above the top opening and has a gap between the cover plate and the top surface of the mineralization trough, and / or the cover plate is installed on the top surface of the mineralization trough to cover the top opening and the cover plate is provided with a cover plate through hole, the cover plate and the mineralization trough define a confined mineralization area including the mechanical stirring chamber, and the gap and / or the cover plate through hole constitute a slurry outlet for discharging slurry from the mechanical stirring chamber; a rotor assembly, wherein the rotor assembly comprises a rotating shaft and a rotor, the lower end of the rotating shaft passes through the cover plate and extends into the mechanical stirring chamber, the rotor is located in the mechanical stirring chamber, the rotor is installed at the lower end of the rotating shaft and is driven to rotate by the rotating shaft to stir the slurry in the mechanical stirring chamber.

[0007] According to the confined mineralization device of the embodiment of the present invention, the slurry is introduced into the mineralization tank from bottom to top through the slurry inlet, and the rotor rotates and stirs in the mechanical stirring chamber, thereby mineralizing the bubbles generated by the mechanical stirring and forming mineralized bubbles. The cover plate and the mineralization tank define a confined mineralization area or mineralization space including the mechanical stirring chamber, thereby extending the time for the slurry and bubbles to reflect, rectify and surge in the mechanical stirring chamber, so as to increase the contact time, contact times and collision times between the bubbles and the target particles, thereby improving the mineralization and flotation effects, and further improving the mineralization and flotation efficiency of the confined mineralization device.

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

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

[0010] In some embodiments, within the longitudinal section of the mineralized groove, the peripheral wall of the mineralized groove includes a plurality of line segments connected in sequence, and the inclination 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 cover plate through hole.

[0012] In some embodiments, the mechanical stirring chamber is cylindrical or includes a cylindrical section and a tapered section connected to the lower end of the cylindrical section and tapering from top to bottom.

[0013] In some embodiments, the mechanical stirring chamber is in the shape of a spherical segment or an ellipsoid segment.

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

[0015] In some embodiments, a gas supply channel for supplying gas to the mechanical stirring chamber is provided in the rotating shaft.

[0016] In some embodiments, the rotor includes a wheel disc and a plurality of blades, wherein the wheel disc is mounted at the lower end of the rotating shaft, and the plurality of blades are arranged at intervals along the circumference of the wheel disc on the outer periphery of the wheel disc. In the longitudinal section of the rotor, the contour line of the outer side surface of the blade includes a vertical segment and an arc segment, and the upper end of the arc segment is connected to the lower end of the vertical segment and gradually extends inward.

[0017] In some embodiments, the blade is provided with a hollow hole extending through the blade along the thickness direction thereof.

[0018] In some embodiments, a gas supply channel for supplying gas to the mechanical stirring chamber is provided in the rotating shaft, and an injection channel and an injection hole are provided in the rotor, and the injection channel is connected with the gas supply channel and the injection hole.

[0019] In some embodiments, the jet channel is arranged in the wheel disc and the jet holes are arranged on the outer peripheral surface of the wheel disc; and / or, the jet channel is arranged in the wheel disc and the blades and the jet holes are arranged on at least one of the outer peripheral surface of the wheel disc and the blades.

[0020] In some embodiments, a plurality of turbulence enhancement plates are provided in the mechanical stirring chamber, and the plurality of turbulence enhancement plates are arranged at intervals along the circumference of the mechanical stirring chamber, and the turbulence enhancement plates are connected to the inner wall of the mechanical stirring chamber.

[0021] In some embodiments, the rotor is an impeller, the outer diameter of the impeller is A, and the gap between the outer circumference of the impeller and the inner edge of the turbulence enhancement plate in the radial direction of the rotating shaft is B, wherein 0.03A≤B≤0.2A.

[0022] The flotation equipment of the embodiment of the present invention includes: a confined mineralization device, which is the confined mineralization device described in any one of the embodiments of the present invention; a tank body, in which the confined mineralization device is arranged; and a driving device, which is arranged above the tank body and connected to the rotating shaft to drive the rotating shaft to rotate.

[0023] According to the flotation equipment of the embodiment of the present invention, the slurry is introduced into the mineralization tank from bottom to top through the slurry inlet, the rotor rotates and stirs in the mechanical stirring chamber, the air is broken into tiny bubbles, the target particles are attached to the bubbles to form mineralized bubbles, and the cover plate and the mineralization tank define a restricted mineralization area including the mechanical stirring chamber, thereby extending the time for the slurry to be reflected, rectified and surging in the mechanical stirring chamber, so as to increase the contact time, contact and collision times between the bubbles and the target particles, thereby improving the mineralization and flotation effects, and further improving the mineralization and flotation efficiency of the flotation equipment.

[0024] In some embodiments, the trough body has a lower area, an upper area and a connecting area, the lower area is located below the mineralization trough, the upper area is located above the mineralization trough, and the connecting area is located between the outer peripheral wall of the mineralization trough and the inner peripheral wall of the trough body, the mineralized bubbles in the slurry discharged from the mechanical stirring chamber enter the upper area, and the slurry containing other particles enters the lower area through the connecting area and is discharged from the lower area.

[0025] In some embodiments, the flotation equipment further comprises an aeration device, the cell body is provided with an upper region and a column selection region, the upper region is located above the mineralization cell, the column selection region comprises a lower region and a connecting region, the lower region is located below the mineralization cell, the connecting region is located between the outer peripheral wall of the mineralization cell and the inner peripheral wall of the cell body, the aeration device is connected to the lower region, and is used for inflating air into the lower region, so as to column select the ore pulp entering the column selection region from the mechanical stirring chamber in the column selection region. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of a flotation device according to an embodiment of the present invention.

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

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

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

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

[0031] Figure 6 It is a schematic longitudinal section diagram of a confined mineralization device according to an embodiment of the present invention.

[0032] Figure 7 It is a schematic longitudinal section diagram of a confined mineralization device according to another embodiment of the present invention.

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

[0034] Fig. 9 It is a schematic longitudinal section diagram of a mineralization trough and a cover plate of a confined mineralization device according to an embodiment of the present invention.

[0035] Fig.10 It is a schematic longitudinal section diagram of a mineralization trough and a cover plate of a confined mineralization device according to another embodiment of the present invention.

[0036] Fig.11 Schematic diagram of the rotor of the confined mineralization device according to an embodiment of the present invention.

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

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

[0039] Reference numerals:

[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. rotating shaft; 211. air supply channel; 22. rotor; 221. hub; 222. wheel disc; 2220. jet channel; 223. blades; 2231. upper blades; 2232. lower blades; 2233. hollow holes; 2234. vertical section; 2235. arc 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. Driving device;

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

[0044] 5. Inflatable device. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0046] Please refer to the following Figures 1 to 13 The confined mineralization device according to the embodiment of the present invention and the flotation equipment having the confined mineralization device are described.

[0047] like Figures 1 to 7 As shown, the confined mineralization device of the embodiment of the present invention includes: a mineralization tank 1, a cover plate 31 and a rotor assembly 2. The mineralization tank 1 has a mechanical stirring chamber 13, and the mechanical stirring chamber 13 is used to mineralize the bubbles generated by mechanical stirring, which is called mechanical stirring mineralization, that is, the particles and air in the slurry are stirred by the rotor assembly 2, and the particles adhere to the bubbles to form mineralized bubbles. The mineralization tank 1 is provided with a slurry 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 with 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 restricted mineralization area including the mechanical stirring chamber 13, and 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 if Figure 1 As shown, in the embodiment where "the cover plate 31 is located above the top opening 12 and has a gap with the top surface of the mineralization tank 1", the gap constitutes a slurry outlet for discharging slurry from the mechanical stirring chamber 13. Figure 7As shown, in the embodiment of "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 through hole 311 constitutes a slurry outlet for discharging slurry from the mechanical stirring chamber 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 be provided on the cover plate at the same time. The above embodiment can be selected according to the specific application.

[0050] The slurry discharged from the slurry outlet includes target particles (particles attached to the bubbles) and other particles (particles not attached to the 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 chamber 13 through the cover plate 31. The rotor 22 is located in the mechanical stirring chamber 13. The rotor 22 is installed at the lower end of the rotating shaft 21 and is driven to rotate by the rotating shaft 21 to stir the slurry in the mechanical stirring chamber 13.

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

[0053] According to the confined mineralization device of the embodiment of the present invention, the slurry is introduced into the mineralization tank 1 from bottom to top through the slurry inlet 11, the rotor 22 rotates and stirs in the mechanical stirring chamber 13, the air is broken into tiny bubbles, and the target particles are attached to the bubbles to form mineralized bubbles. The cover plate 31 and the mineralization tank 1 define a confined mineralization area including the mechanical stirring chamber 13, thereby extending the time for the slurry to reflect, rectify and surge in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times between the bubbles and the target particles, thereby improving the mineralization and flotation effects, and further improving the mineralization and flotation efficiency of the confined mineralization device.

[0054] It is understandable that the confined mineralization device of the embodiment of the present invention improves the sealing of the mechanical stirring chamber 13 by setting the cover plate 31 on the upper side of the mechanical stirring chamber 13, and can prolong the time of reflection, rectification and surging of the slurry in the mechanical stirring chamber 13, so as to increase the contact time, contact number and collision number of bubbles and target particles, thereby improving the mineralization and flotation effect. In addition, the flow field disturbance formed by the rotation of the rotor 22 is blocked by the cover plate 31, so that the turbulence intensity in the lower side of the upper area 42 above the mechanical stirring chamber 13 is low, which is conducive to the rise of mineralized bubbles.

[0055] In other words, the turbulence of the slurry is more intense in the relatively closed and relatively small area with the cover plate 31, the bubbles are smaller, and it is easier to capture fine particles. The mineralized bubbles flow more smoothly on the lower side of the upper area 42 above the mechanical stirring chamber 13, and the attached particles are more stable and not easy to fall off.

[0056] It can be understood that mineralization refers to the selective adhesion process of target particles and bubbles. After mineralization, the slurry includes mineralized bubbles (mineralized bubbles can be called mineralized foam after aggregation. In the following description, mineralized bubbles and mineralized foam can be used interchangeably) and other particles not attached to the bubbles. Mineralized bubbles are target particles attached to bubbles. Here, the target particles attached to the bubbles can also be called mineralized particles. Other particles may include target particles not attached to the bubbles, non-target mineral particles not attached to the bubbles, and tailings particles.

[0057] Alternatively, if Fig. 9 and Fig.10 As shown, 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 to be gradually narrowed. For example, the cross-sectional area of ​​the mechanical stirring chamber 13 in the 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. Since the top opening 12 of the mineralization tank 1 is arranged to be gradually narrowed, a part of the slurry flowing upward can be returned to the mechanical stirring chamber 13 for mechanical stirring and mineralization again, thereby extending the time for the slurry to reflect, rectify and surge in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times of bubbles and target particles, thereby improving the mineralization and flotation effects.

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

[0060] In some examples, such as Figures 1 to 4 As shown, the slurry inlet 11 is arranged on the bottom wall 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 broken up by the rotor 22 to increase the turbulence intensity of the slurry in the mineralization tank 1.

[0061] In other examples, the slurry inlet 11 is disposed on the side wall of the mineralization tank 1 and arranged adjacent to the bottom of the mineralization tank 1, thereby reducing the upward impact force of the slurry, thereby extending the mineralization time of the slurry in the mineralization tank 1 and improving the mineralization effect.

[0062] In some embodiments, Figure 1 and Figure 7 As shown, in the longitudinal section of the mineralized groove 1, that is, along the axial direction of the mineralized groove 1 ( Figure 1In the cross section of the mineralized groove 1 (in the vertical direction in the middle), the peripheral wall of the mineralized groove 1 includes a plurality of 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 mineralized groove 1 is not arc-shaped, but is composed of a plurality of straight line segments 14, and the inclination angles of different peripheral wall parts are different.

[0063] Since the inclination angles α of adjacent line segments 14 are different from each other, that is, the inclination angles of different parts of the peripheral wall of the mineralization tank 1 are different, and the slurry angles reflected by different peripheral wall parts are different, compared with the arc-shaped peripheral wall, the slurry flows reflected by the peripheral wall parts with different inclination angles collide with each other in the mineralization tank 1, thereby enhancing the turbulence generated by the mineralization tank 1, reducing the weak mineralization area, further increasing the probability of bubble generation and attachment to particles, thereby improving the mineralization effect, and reducing the local wear of the mineralization tank 1. Therefore, the confined mineralization device of the embodiment of the present invention can form a strong turbulent flow field in the mechanical stirring chamber 13, reduce the weak mineralization area, improve the mineralization effect, and reduce the local wear of the mineralization tank 1, and by changing the inclination angles of different peripheral wall parts, it can adapt to different slurries, thereby improving applicability.

[0064] For example, 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 may have a generally segmented basin-shaped structure. The segmented basin-shaped mechanical stirring chamber 13 may provide reflection forces in multiple directions for the slurry stirred by the rotor 22, thereby strengthening the collision effect of the slurry flow, increasing the turbulence intensity, and improving the mineralization effect.

[0065] Compared with the open reflective bottom of the parabolic or arc-shaped structure in the related art, the mineralization trough 1 of the mineralization device of the embodiment of the present invention is easier to process and obtain multiple reflective focuses. In other words, the mineralization trough 1 in the embodiment of the present invention is easier to achieve multiple reflective focuses close to the theoretical design, which improves the actual application effect. For mineralization troughs 1 of different sizes, by adjusting the number and inclination of the line segments 14 in the longitudinal section of the mineralization trough 1, a solution close to the theoretical focus can still be obtained, and it is easier to realize the theoretical flow field model, that is, folding and surging in multiple directions along the inner wall of the mineralization trough 1, thereby forming a strong turbulent flow field. The mineralization trough 1 of the embodiment of the present invention can strengthen the overall mineralization and reduce the weak mineralization area in the mechanical stirring chamber 13, reducing the situation of local excessive wear of the mineralization trough 1.

[0066] Optionally, the number of line segments 14 is proportional to the area of ​​the cover plate through hole 311. It should be noted that when there are multiple cover plate through holes 311, the number of 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 line segments 14 is greater, thereby improving the reflection and rectification effect of the mineralization tank 1, thereby forming a strong turbulent flow field. When designing the mineralization tank 1, the structure of the mineralization tank 1 can be adjusted as the mineralization tank 1 increases and the mineral type changes, so as to meet the mineralization requirements of the mineralization device and improve the mineralization effect.

[0067] In some embodiments, Figure 4 and Figure 6 As shown, the mechanical stirring chamber 13 is cylindrical or includes a cylindrical section 131 and a tapered section 132 connected to the lower end of the cylindrical section 131 and tapering from top to bottom. Since the mechanical stirring chamber 13 is a cylindrical structure, the turbulence in the horizontal direction of the slurry can be increased, so that the energy of the slurry flow is more concentrated and the utilization efficiency is higher. When fine-particle minerals can achieve the same mineralization effect, the energy dissipation can be lower, or the mineralization kinetic energy is more sufficient under the same energy condition, and it is easier to form tiny bubbles.

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

[0069] like Figure 4 As shown, for another example, when the mechanical stirring chamber 13 includes a cylindrical section 131 and a conical section 132, the bottom surface of the mineralization tank 1 is a conical surface.

[0070] In some embodiments, Fig. 9 and Fig.10 As shown, the mechanical stirring chamber 13 is in the shape of a spherical indentation or an ellipsoid indentation. "Spherical indentation" means that a notch is set at the upper end of the sphere to form a top opening 12. In the longitudinal section of the spherical indentation-shaped mechanical stirring chamber 13, the contour of the mechanical stirring chamber 13 is a perfect circular contour with a flat upper end. "Ellipsoid indentation" means that a notch is set at the upper end of the ellipsoid to form a top opening 12. In the longitudinal section of the ellipsoidal indentation-shaped mechanical stirring chamber 13, the contour of the mechanical stirring chamber 13 is an elliptical contour with a flat upper end.

[0071] The confined mineralization device of the embodiment of the present invention sets the mechanical stirring chamber 13 as the above structure, so that the slurry can be repeatedly folded and surged along the inner wall of the mineralization tank 1, thereby forming a strong turbulent flow field. The mineralization tank 1 of the embodiment of the present invention can strengthen the overall mineralization and reduce the weak mineralization area in the mechanical stirring chamber 13, thereby reducing the situation of local excessive wear of the mineralization tank 1.

[0072] Alternatively, if Fig. 9As shown, when the mechanical stirring chamber 13 is in the shape of a spherical segment, the cover plate 31 is located above the sphere center O1 of the mechanical stirring chamber 13. The confined mineralization device of the embodiment of the present invention sets the mechanical stirring chamber 13 as the above structure, so that a part of the slurry flowing upward can be returned to the mechanical stirring chamber 13 for mechanical stirring and mineralization again, thereby extending the time for the slurry to reflect, rectify and surge in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effects.

[0073] Alternatively, if Fig.10 As shown, when the mechanical stirring chamber 13 is in the shape of an ellipsoid, the short axis L2 of the mechanical stirring chamber 13 extends in the up-down direction, the long axis L1 of the mechanical stirring chamber 13 extends in the horizontal direction, and the cover plate 31 is located above the long axis L1. The confined mineralization device of the embodiment of the present invention sets the mechanical stirring chamber 13 as the above structure, so that a part of the slurry flowing upward can be returned to the mechanical stirring chamber 13 for mechanical stirring and mineralization again, thereby extending the time for the slurry to reflect, rectify and surge in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times of the bubbles and the target particles, thereby improving the mineralization and flotation effects.

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

[0075] In other examples, the confined mineralization device can also fill the mineralizing gas into the mechanical stirring chamber 13 through a pipeline at the slurry inlet 11 of the mineralization tank 1. Of course, the gas can also be introduced into the mechanical stirring chamber 13 by self-absorption.

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

[0077] The hub 221 is mounted at the lower end of the rotating shaft 21, and the wheel disc 222, the top plate 224 and the bottom plate 225 are mounted on the hub 221, and the wheel disc 222 is located between the top plate 224 and the bottom plate 225. There are multiple upper blades 2231 and multiple lower blades 2232, and multiple upper blades 2231 are arranged between the upper surface of the wheel disc 222 and the top plate 224 and are arranged at intervals along the circumference of the wheel disc 222. Multiple lower blades 2232 are arranged between the lower surface of the wheel disc 222 and the wheel disc 222 and are arranged at intervals along the circumference of the wheel disc 222. The upper blades 2231 and the lower blades 2232 correspond to each other one by one or are 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 simultaneously, which can enhance the slurry suction capacity of the impeller (the ability to suck the slurry from the slurry inlet 11 into the mechanical stirring chamber 13) on the one hand, and enhance the intensity of the internal slurry circulation, improve the mineralization effect, and enhance the selectivity in the flotation process on the other hand.

[0079] For example, the upper blades 2231 and the lower blades 2232 are radially distributed, and the number of the upper blades 2231 and the lower blades 2232 are between 4 and 16 and are evenly arranged. It should be noted that the number of the upper blades 2231 and the lower blades 2232 can be equal or unequal, and the embodiment of the present invention is not limited to this.

[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 intensity of the internal slurry circulation can be further enhanced, and the energy utilization rate of the impeller rotation is improved, which is beneficial to enhance the capture effect of bubbles on target particles and enhance the selectivity in the flotation process.

[0081] For example, the outer circumference of the top plate 224 is substantially consistent with the size of the outer circumference formed by the plurality of upper blades 2231 , and the outer circumference of the bottom plate 225 is substantially consistent with the size of the outer circumference formed by the plurality of lower blades 2232 .

[0082] In some embodiments, Fig.13As shown, the rotor 22 includes a wheel disc 222 and a plurality of blades 223, the wheel disc 222 is mounted at the lower end of the rotating shaft 21, and the plurality of blades 223 are arranged at intervals along the circumference of the wheel disc 222 on the outer peripheral edge of the wheel disc 222. In the longitudinal section of the rotor 22, the contour line of the outer side surface of the blade 223 includes a vertical section 2234 and an arc section 2235, and the upper end of the arc section 2235 is connected to the lower end of the vertical section 2234 and gradually extends inward. Thus, when the rotor 22 rotates, the stirred slurry area turns upward along the arc section 2235. The confined mineralization device of the embodiment of the present invention can enhance the turbulence effect of the slurry in the mechanical stirring chamber 13 by setting the blades 223 as the above structure, enhance the capture effect of the bubbles on the target particles, enhance the intensity of the internal slurry circulation, and improve the energy utilization rate of the impeller rotation.

[0083] In some embodiments, Fig.13 As shown, the blade 223 is provided with a hollow hole 2233 that penetrates along the thickness direction thereof. The blade 223 of the confined mineralization device of the embodiment of the present invention is designed as a hollow structure, and it is easier to generate tiny bubbles when the impeller rotates, so that the circulation and mixing effect of the slurry and the bubbles is better, which is more conducive to the mineralization of fine-grained minerals.

[0084] For example, the hollow hole 2233 may be a strip hole or a round hole. The strip hole may extend obliquely, horizontally, or vertically. There may be a plurality of hollow holes 2233, and the plurality of hollow holes 2233 may be discretely arranged.

[0085] In some embodiments, Fig.13 As shown, the rotating shaft 21 is provided with a gas supply channel 211 for supplying gas to the mechanical stirring chamber 13, and the rotor 22 is provided with an air jet channel 2220 and an air jet hole, and the air jet channel 2220 is connected with the gas supply channel and the air jet hole. Since the mixing degree of the slurry and the bubbles can be improved, the mineralization effect of the confined mineralization device is improved.

[0086] For example, Fig.13 As shown, the jet channel 2220 is provided in the wheel disc 222 and the jet holes are provided on the outer peripheral surface of the wheel disc 222. For another example, the jet channel 2220 is provided in the wheel disc 222 and the blades 223 and the jet holes are provided on at least one of the outer peripheral surface of the wheel disc 222 and the blades 223. Since the jet outlets of the jet channel 2220 in the wheel disc 222 are formed on the outer peripheral surface of the wheel disc 222 or the blades 223 and are arranged at intervals along the circumference of the wheel disc 222, the mixing degree of the slurry and the bubbles can be improved, and the mineralization effect of the confined mineralization device can be improved.

[0087] In some embodiments, Figure 7 and Figure 8As shown, a plurality of turbulence reinforcing plates 15 are provided in the mechanical stirring chamber 13, and the plurality of turbulence reinforcing plates 15 are arranged at intervals along the circumference of the mechanical stirring chamber 13, and the turbulence reinforcing plates 15 are connected to the inner wall of the mechanical stirring chamber 13 and surround the rotor 22. When the rotor 22 rotates, since the plurality of turbulence reinforcing plates 15 are arranged at intervals along the circumference of the mechanical stirring chamber 13, the slurry flowing in the circumferential direction in the mechanical stirring chamber 13 is stopped and collided by the plurality of turbulence reinforcing plates 15, thereby improving the turbulence effect of the slurry in the mechanical stirring chamber 13, and thus improving the mineralization effect.

[0088] Alternatively, if 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 edge of the impeller and the inner edge of the turbulence reinforcement 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 edge of the turbulence reinforcement plate 15 is 3%-20% of the impeller diameter. For example, B is equal to 0.03A, 0.08A, 0.12A, 0.15A, 0.2A. The inventors of the embodiments of the present invention have found through research and have confirmed through experiments that when the impeller and the turbulence reinforcement plate 15 adopt the above-mentioned structural parameters, it can make it easier to generate tiny bubbles during the mineralization of the slurry, and the circulation mixing effect is better, which is more conducive to the mineralization of fine-grained minerals.

[0089] like Figures 1 to 5 As shown, the flotation device of the embodiment of the present invention includes: a confined mineralization device, a tank body 4 and a driving device 35. The confined mineralization device is the confined mineralization device in the above example, the confined mineralization device is arranged in the tank body 4, and the driving device 35 is arranged above the tank body 4 and connected to the rotating shaft 21 to drive the rotating shaft 21 to rotate.

[0090] According to the flotation device of the embodiment of the present invention, the slurry is introduced into the mineralization tank 1 from bottom to top through the slurry inlet 11, the rotor 22 rotates and stirs in the mechanical stirring chamber 13, the air is broken into tiny bubbles, and the target particles are attached to the bubbles to form mineralized bubbles. The cover plate 31 and the mineralization tank 1 define a restricted mineralization area including the mechanical stirring chamber 13, thereby extending the time for the slurry to reflect, rectify and surge in the mechanical stirring chamber 13, so as to increase the contact time, contact and collision times between the bubbles and the target particles, thereby improving the mineralization and flotation effects, and further improving the mineralization and flotation efficiency of the flotation device.

[0091] Specifically, the driving device 35 may be a combination structure of a driving motor and a pulley assembly, that is, the driving motor drives the pulley assembly to rotate, and the pulley assembly drives the rotating shaft 21 to rotate synchronously.

[0092] The bottom of the tank body 4 may be in any shape such as a cone (funnel), a pyramid or a wedge, so as to guide the tailings, thereby improving the efficiency of the tailings being discharged from the discharge port 43 .

[0093] In some embodiments, Figure 3 As shown, the tank body 4 has a lower area 411, an upper area 42 and a connecting area 412. The lower area 411 is located below the mineralization tank 1, the upper area 42 is located above the mineralization tank 1, and the connecting area 412 is located 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 chamber 13 enter the upper area 42, and the slurry containing other particles enters the lower area 411 through the connecting area 412 and is discharged from the lower area 411 (i.e., the discharge port 43 at the bottom of the tank body 4).

[0094] It is understandable that the flotation device of the embodiment of the present invention can be used as a flotation device for mechanical agitation mineralization. When the flotation device is working, the mineralized bubbles in the slurry discharged from the mechanical agitation chamber 13 enter the upper area 42, and the slurry containing other particles (i.e., tailings) directly enters the lower area 411 through the connecting area 412 and is discharged from the discharge port 43 at the bottom of the tank body 4.

[0095] In some embodiments, Figures 1 to 5 As shown, the flotation equipment also includes an aeration device 5. The tank body 4 has an upper area 42 and a column selection area. The upper area 42 is located above the mineralization tank 1. The column selection area includes a lower area 411 and a communication area 412. The lower area 411 is located below the mineralization tank 1. The communication area 412 is located 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 connected to the lower area 411 and is used to inflate the lower area 411 so as to column select the ore pulp entering the column selection area from the mechanical stirring chamber 13 in the column selection area.

[0096] Among them, the mineralized bubbles flow out from the slurry outlet of the mineralization tank 1 and flow upward to the upper area 42. Other particles not attached to the bubbles can flow out from the slurry outlet of the mineralization tank 1, and under the action of gravity, enter the lower area 411 through the connecting area 412. Under the action of the aeration device 5, column selection can be performed in the lower area 411. The mineralized bubbles after column selection flow upward to the upper area 42 through the connecting area 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 equipment of the embodiment of the present invention uses mechanical stirring combined with column selection to mineralize the bubbles to improve the mineralization and flotation effects of the flotation equipment.

[0097] In some embodiments, Figure 3As shown, the flotation equipment also includes a pre-mineralization device 33, which is used to pre-mineralize the pulp. The pre-mineralization device 33 is arranged outside the tank body 4 and is connected to the pulp inlet 11 of the mechanical stirring chamber 13 to supply the pre-mineralized pulp into the mechanical stirring chamber 13. The pre-mineralization device 33 can be a mechanical stirring mineralization type or an aerated mineralization type. It can be understood that when the flotation equipment is mineralizing the pulp, the pulp is first pre-mineralized by the pre-mineralization device 33, and then the pre-mineralized pulp is passed into the mineralization tank 1 through the feed pipe 32 for mechanical stirring mineralization, and then enters the lower area 411 for column selection. This can further improve the mineralization effect, which is particularly beneficial to the mineralization of fine-grained minerals.

[0098] Alternatively, if Figure 2 As shown, the turbulence suppression grid 34 may be located in the lower side of the upper region 42. The turbulence suppression grid 34 may 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 and down direction is adjustable, so that the flotation equipment can adjust the turbulence suppression grid 34 to a suitable position according to different flotation minerals or flotation effects, so as to expand the application range of the flotation equipment and achieve better turbulence suppression effect.

[0100] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0104] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0105] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A confined mineralization device, characterized in that: include: A mineralization tank, wherein the mineralization tank has a mechanical stirring chamber, the mineralization tank is provided with a slurry inlet for supplying slurry into the mechanical stirring chamber, and the top surface of the mineralization tank is open to form a top opening; A cover plate, wherein 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 provided with a cover plate through hole, the cover plate and the mineralization tank define a restricted mineralization area including the mechanical stirring chamber, and the gap and / or the cover plate through hole constitute a slurry outlet for discharging slurry from the mechanical stirring chamber; A rotor assembly, wherein the rotor assembly comprises a rotating shaft and a rotor, wherein the lower end of the rotating shaft passes through the cover plate and extends into the mechanical stirring chamber, the rotor is located in the mechanical stirring chamber, and the rotor is mounted at the lower end of the rotating shaft and driven to rotate by the rotating shaft to stir the slurry in the mechanical stirring chamber.

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 mineralized groove.

3. The confined mineralization device according to claim 1, characterized in that: The slurry inlet is arranged at the lower part of the mineralization trough and adjacent to the bottom surface of the mineralization trough, or the slurry inlet is arranged on the bottom surface of the mineralization trough.

4. The confined mineralization device according to any one of claims 1 to 3, characterized in that: In the longitudinal section of the mineralized groove, the peripheral wall of the mineralized groove includes a plurality of line segments connected in sequence, and the inclination 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 through hole of the cover plate.

6. The confined mineralization device according to any one of claims 1 to 3, characterized in that: The mechanical stirring chamber is cylindrical or comprises a cylindrical section and a tapered section connected to the lower end of the cylindrical section and tapering from top to bottom.

7. The confined mineralization device according to any one of claims 1 to 3, characterized in that: The mechanical stirring chamber is in the shape of a spherical segment or an ellipsoidal segment.

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

9. The confined mineralization device according to claim 1, characterized in that: A gas supply channel for supplying gas to the mechanical stirring chamber is arranged in the rotating shaft.

10. The confined mineralization device according to claim 1, characterized in that: The rotor includes a wheel disc and a plurality of blades, wherein the wheel disc is mounted at the lower end of the rotating shaft, and the plurality of blades are arranged at intervals along the circumference of the wheel disc on the outer peripheral edge of the wheel disc. In the longitudinal section of the rotor, the contour line of the outer side surface of the blade includes a vertical segment and an arc segment, and 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 penetrating along the thickness direction thereof.

12. The confined mineralization device according to claim 10, characterized in that: The rotating shaft is provided with a gas supply channel for supplying gas into the mechanical stirring chamber, and the rotor is provided with an injection channel and an injection hole, and the injection channel is communicated with the gas supply channel and the injection hole.

13. The confined mineralization device according to claim 12, characterized in that: The jet channel is arranged in the wheel disc and the jet holes are arranged on the outer peripheral surface of the wheel disc; and / or the jet channel is arranged in the wheel disc and the blades and the jet holes are arranged on at least one of the outer peripheral surface of the wheel disc and the blades.

14. The confined mineralization device according to claim 10, characterized in that: A plurality of turbulence reinforcement plates are arranged in the mechanical stirring chamber, and the plurality of turbulence reinforcement plates are arranged at intervals along the circumference of the mechanical stirring chamber, and the turbulence reinforcement plates are connected to the inner wall of the mechanical stirring chamber.

15. The confined mineralization device according to claim 14, characterized in that: The rotor is an impeller, the outer diameter of the impeller is A, and the gap between the outer circumference of the impeller and the inner edge of the turbulence reinforcement plate in the radial direction of the rotating shaft is B, wherein 0.03A≤B≤0.2A.

16. A flotation device, characterized in that: include: A confined mineralization device, wherein the confined mineralization device is the confined mineralization device according to any one of claims 1 to 15; A tank body, wherein the confined mineralization device is arranged in the tank body; A driving device is arranged above the trough body and connected to the rotating shaft to drive the rotating shaft to rotate.

17. The flotation device according to claim 16, characterized in that The tank body is provided with a lower area, an upper area and a connecting area, the lower area is located below the mineralization tank, the upper area is located above the mineralization tank, the connecting area 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 slurry discharged from the mechanical stirring chamber enter the upper area, and the slurry containing other particles enters the lower area through the connecting area and is discharged from the lower area.

18. The flotation device according to claim 16, characterized in that The flotation equipment also includes an aeration device. The cell body is provided with an upper region and a column selection region. The upper region is located above the mineralization cell. The column selection region includes a lower region and a communication region. The lower region is located below the mineralization cell. The communication region is located between the outer peripheral wall of the mineralization cell and the inner peripheral wall of the cell body. The aeration device is connected to the lower region and is used to inflate the lower region so as to column select the ore pulp entering the column selection region from the mechanical stirring chamber in the column selection region.

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