A hybrid shearing device for mineral flotation

Abstract

This application relates to the technical field of mineral flotation apparatus, and in particular to a mixing and shearing device for mineral flotation, comprising a mixing tank with a mixing chamber connected to an inlet and an outlet; a dosing assembly for supplying flotation reagents into the mixing chamber; a drive mechanism mounted on the mixing tank; a first shearing structure disposed within the mixing chamber and driven to rotate by the drive mechanism; and a second shearing structure disposed within the mixing chamber. The second shearing structure has a first working state: a fixed state; and a second working state: a rotating state. This application overcomes the defects of uneven reagent dispersion and low mixing efficiency through the synergistic effect of the first and second shearing structures, promoting the full interaction between mineral particles and reagents, thereby effectively improving the efficiency of mineral flotation. Simultaneously, the rotating state of the second shearing structure allows it to scrape the inner wall of the mixing chamber, removing adhering slurry and ensuring uniform slurry preparation, thus stabilizing operational efficiency.

Description

Technical Field

[0001] This application relates to the field of mineral flotation apparatus technology, and in particular to a mixing and shearing apparatus for mineral flotation. Background Technology

[0002] With the development and utilization of mineral resources, lean, fine, and complex minerals will increasingly become the main source of resources, leading to a higher proportion of fine particles in the flotation separation process. The industry faces the challenge of how to efficiently utilize these resources.

[0003] Existing mineral flotation is the most economical and effective separation method for mineral and coal resources, especially contributing significantly to the large-scale recovery of valuable components from low-quality mineral resources such as fine and micro-fine particles. Slurry conditioning is a crucial step in the flotation process, primarily aimed at reducing the fine mud content on the surface of mineral particles, improving the dispersion, collision, and adhesion efficiency between mineral particles and reagents, increasing the differences in surface properties between different mineral particles, and promoting efficient flotation separation. Therefore, efficient slurry conditioning is a prerequisite for the flotation separation of fine and micro-fine minerals. Because micro-fine minerals possess both low density and high specific surface area, they easily adhere to the surface of target mineral particles during flotation, reducing the interaction between the target mineral particles and flotation reagents and affecting the surface properties of the target mineral.

[0004] The existing technical solutions described above have the following drawbacks: Currently, stirring devices are typically used to mix the slurry and flotation reagents. However, the existing mixing methods have limited contact between the slurry and flotation reagents, failing to achieve a high degree of dispersion of the flotation reagents within the slurry. This results in low flotation efficiency when the slurry, after being treated in the stirred tank, enters the flotation equipment. Furthermore, during the stirring process, some slurry may adhere to the sidewalls, deviating from the mainstream mixing flow field and failing to fully contact and react with the flotation reagents, leading to insufficient mineral reagent modification. Simultaneously, it can cause material retention and deterioration, ultimately resulting in a decline in the overall separation performance of the slurry entering the flotation tank and a significant reduction in flotation efficiency. Summary of the Invention

[0005] This application provides a mixing and shearing device for mineral flotation in order to ensure sufficient contact between the slurry and flotation reagents, and to effectively remove the slurry adhering to the sidewalls, thereby improving overall operating efficiency and results.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: A mixing and shearing device for mineral flotation includes a mixing tank with a mixing chamber for mixing slurry and flotation reagents; The mixing chamber is connected to an inlet and an outlet; Dosing assembly for delivering flotation reagents into the mixing chamber; The drive mechanism is located on the mixing tank; The first shearing structure is located inside the mixing chamber and is driven to rotate by a driving mechanism; The second shearing structure is located inside the mixing chamber; The second shearing structure has a first working state: in a fixed state, it cooperates with the first shearing structure to perform shearing; and a second working state: in a rotating state, it scrapes the inner wall of the mixing chamber.

[0007] By adopting the above scheme and introducing the synergistic effect of the first and second shear structures, the mixing effect is significantly improved. When the slurry and flotation reagents enter the first mixing chamber, the high-speed rotation of the first shear structure generates strong shear force in the slurry. Simultaneously, the second shear structure is in its first working state, i.e., fixed. The second shear structure disrupts the overall rotating flow field of the slurry, creating a localized high-shear region and intense turbulence between the first and second shear structures. This combination of dynamic and static shear components allows the flotation reagents to be more thoroughly dispersed in the slurry, forming smaller reagent droplets and greatly increasing the contact area and collision frequency between the reagents and mineral particles. Furthermore, the second shear structure can be adjusted to a second working state, i.e., in a rotating state, to scrape the inner wall of the mixing chamber, removing slurry adhering to the wall surface, ensuring slurry uniformity, stabilizing operating efficiency, and guaranteeing the overall flotation effect.

[0008] Furthermore, the second shearing structure extends along the axial direction of the output shaft of the drive mechanism; The second shear structure has a first shear portion on the side facing the first shear structure; The second shearing structure has a scraping part on the side opposite to the first shearing part; The first working state of the second shearing structure: the second shearing structure is in a fixed state, and the first shearing part and the first shearing structure cooperate to perform shearing; The second working state of the second shearing structure: the second shearing structure rotates circumferentially along the inner wall of the mixing chamber, and the scraping part scrapes the inner wall of the mixing chamber.

[0009] Furthermore, the second shearing structure switches between a first working state and a second working state by rotating the output shaft of the drive mechanism in both directions.

[0010] Furthermore, a support ring is rotatably provided on the inner wall of the mixing chamber; The support ring rotates circumferentially along the inner wall of the mixing chamber; The second shear structure is fixed to the support ring; In the first working state of the second shearing structure, the support ring is in a fixed state; in the second working state, the support ring rotates circumferentially along the inner wall of the mixing chamber.

[0011] Furthermore, a one-way bearing is provided on the output shaft of the drive mechanism; The one-way bearing is connected to the support ring via a transmission assembly. When the output shaft of the drive mechanism rotates clockwise, the support ring rotates circumferentially along the inner wall of the mixing chamber; When the output shaft of the drive mechanism reverses, the support ring is in a fixed state; Alternatively, when the output shaft of the drive mechanism reverses, the support ring rotates circumferentially along the inner wall of the mixing chamber; When the output shaft of the drive mechanism rotates forward, the support ring is in a fixed state.

[0012] Furthermore, a toothed ring is provided on the outer peripheral wall of the support ring; The transmission assembly includes The transmission rod is rotatably mounted on the mixing tank and is arranged along the extension direction of the output shaft of the drive mechanism; The driving gear is fixed on the transmission rod and meshes with the gear ring of the support ring for transmission. The inner ring of the one-way bearing is fixedly connected to the output shaft of the drive mechanism; A drive wheel is fixedly mounted on the outer ring of the one-way bearing; The transmission rod is connected to the transmission wheel via a transmission mechanism.

[0013] Furthermore, an installation groove extending circumferentially along the mixing chamber is provided on the inner side wall of the mixing tank; The support ring is disposed in the mounting groove, and the inner circumferential surface of the support ring is flush with the inner surface of the mixing chamber. The inner wall of the mixing tank also has an installation chamber; Both the drive gear and the transmission rod are located in the mounting cavity.

[0014] Furthermore, the mixing chamber includes a first mixing chamber and a second mixing chamber that are connected sequentially from bottom to top; A partition plate is provided between the first mixing chamber and the second mixing chamber; The partition plate has multiple screening holes; The feed inlet is connected to the first mixing chamber; The discharge port is connected to the second mixing chamber; The support ring and the second shear structure are both located inside the second mixing chamber.

[0015] Furthermore, the first shearing structure includes The rotating shaft is fixedly connected to the output shaft of the drive mechanism; The rotating shaft is rotatably connected to the mixing tank and extends from the top of the mixing tank, passing through the second mixing chamber and the first mixing chamber in sequence; The first shearing assembly is mounted on the rotating shaft and disposed within the first mixing chamber; The second shearing assembly is mounted on the rotating shaft and disposed within the second mixing chamber; The support ring and the second shear structure are both positioned opposite to the second shear assembly.

[0016] Furthermore, the mixing chamber includes The third mixing chamber is connected to the first mixing chamber and is located at the bottom of the first mixing chamber; The dosing assembly delivers flotation reagents into the third mixing chamber.

[0017] The rotating shaft extends into the third mixing chamber until it is rotatably connected to the bottom of the first mixing chamber; The first shearing structure includes The third shearing assembly is mounted on the rotating shaft and located inside the third mixing chamber.

[0018] In summary, this application has the following technical effects: 1. By incorporating a first shear structure and a second shear structure, the mixing effect is significantly improved. When the slurry and flotation reagents enter the first mixing chamber, the high-speed rotation of the first shear structure generates strong shear force in the slurry. Simultaneously, the second shear structure operates in a first working state, i.e., a fixed state. This second shear structure disrupts the overall rotating flow field of the slurry, creating a localized high-shear region and intense turbulence between the first and second shear structures. This combination of dynamic and static shear components allows the flotation reagents to be rapidly and thoroughly dispersed into the slurry, forming smaller reagent droplets and greatly increasing the contact area and collision frequency between the reagents and mineral particles. Furthermore, the second shear structure can be adjusted to a second working state, i.e., a rotating state, to scrape the inner wall of the mixing chamber, removing adhering slurry, ensuring uniform slurry preparation, stabilizing operating efficiency, and guaranteeing overall flotation performance. 2. By setting up a drive mechanism and a one-way bearing, the output shaft of the drive mechanism can drive the first shearing structure to rotate regardless of whether it rotates forward or backward. However, due to the one-way bearing, the output shaft of the drive mechanism can only rotate in one direction, driving the second shearing structure to rotate. In this way, two different mechanisms can be driven by one drive mechanism, reducing the number of drive sources; at the same time, the forward and reverse rotation of the output shaft and the one-way bearing are used to switch between different working states.

[0019] 3. By setting a support ring, a drive gear, a transmission wheel, a transmission rod, and a transmission assembly, and by setting a gear ring on the support ring, a stable transmission path is formed between the output shaft of the drive mechanism and the support ring. This ensures that the second shearing structure can rotate stably in the circumferential direction when switching to the second working state of the second shearing structure, thereby improving the stability during the scraping process. At the same time, it ensures the unidirectional conductivity of the one-way bearing, thereby improving the stability of the second shearing structure when switching back and forth between the first and second working states. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the bottom feeding device of this application; Figure 2 This is a cross-sectional view of the bottom feeding device of this application; Figure 3 This is a partial structural diagram of the bottom feeding device of this application; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a partial structural diagram of the bottom feeding device of this application; Figure 6 This is a front view of the first shear structure of this application; Figure 7 This is a schematic diagram of the structure of the third mixing chamber in this application; Figure 8 This is a schematic diagram of the transmission relationship between the first shearing structure, the second shearing structure, and the transmission assembly of this application.

[0021] In the diagram, 1. Mixing tank; 11. Mixing chamber; 111. First mixing chamber; 112. Second mixing chamber; 1121. Second extension; 113. Third mixing chamber; 1131. Top plate; 1132. Through hole; 1133. Side plate; 1134. Flow channel; 114. Mounting groove; 115. Mounting chamber; 12. Support leg; 13. Feed inlet; 14. Discharge outlet; 15. Observation port; 2. Dosing assembly; 21. First pipe section; 22. Second pipe section; 23. Drug storage assembly; 3. Drive mechanism; 4. First shearing structure; 41. Rotating shaft; 42. First shearing assembly; 421. First rotary shearing component; 422. Second rotary shearing component; 423. Second shearing section; 43. Second shearing assembly; 44. Third shearing assembly; 441. Third shearing section; 5. Second shearing structure; 51. Support plate; 52. First shearing section; 53. Scraping section; 6. Divider plate; 61. Screening hole; 62. First extension section; 7. Support ring; 71. Gear ring; 8. Transmission assembly; 81. Drive gear; 82. Transmission wheel; 83. Transmission mechanism; 84. One-way bearing; 85. Transmission rod; 86. Slot. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] In the description of this specific embodiment, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this specific embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this specific embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In traditional mineral flotation processes, fine-grained minerals, due to their low density and high specific surface area, are observed to easily adhere to the surface of target mineral particles, thereby reducing the interaction between the target mineral particles and flotation reagents. Existing mixing devices have shortcomings in the mixing process of the pulp and flotation reagents, limiting the contact effect between the pulp and reagents. The flotation reagents cannot be highly dispersed in the pulp, resulting in reduced flotation efficiency when the treated pulp enters the flotation equipment.

[0026] Reference Figures 1 to 8 To address the aforementioned problems, this application provides a mixing and shearing device for mineral flotation, comprising a mixing tank 1, a dosing assembly 2, a drive mechanism 3, a first shearing structure 4, and a second shearing structure 5. The mixing tank 1 has a mixing chamber 11 for mixing the slurry and flotation reagents. The dosing assembly 2 is used to deliver the flotation reagents into the mixing chamber 11. The mixing chamber 11 is connected to an inlet 13 and an outlet 14.

[0027] In one implementation, the feed inlet 13 is located at the upper part of the mixing chamber 11, and the discharge outlet 14 is located at the lower part of the mixing chamber 11, with the slurry flowing from top to bottom. When the slurry enters the mixing chamber 11 from the top, it will naturally move downwards under gravity, requiring no additional power to propel it, thus significantly reducing energy consumption. Simultaneously, it can increase the slurry flow rate and improve processing efficiency. However, the mixing time is shortened under gravity, potentially resulting in poor mixing performance.

[0028] In another preferred embodiment, the discharge port 14 is located at the upper part of the mixing chamber 11, and the feed port 13 is located at the lower part of the mixing chamber 11, with the slurry flowing from bottom to top. This allows for more thorough mixing and agitation, enabling the flotation reagents to be rapidly and completely dispersed into the slurry, greatly increasing the contact area and collision frequency between the reagents and mineral particles, thereby significantly improving the flotation effect.

[0029] Specifically, the mixing chamber 11 includes a first mixing chamber 111 and a second mixing chamber 112 connected sequentially from bottom to top. The first mixing chamber 111 is connected to a feed inlet 13, and the second mixing chamber 112 is connected to a discharge outlet 14. The drive mechanism 3 is mounted on the mixing tank 1. The drive mechanism 3 drives the first shearing structure 4 to rotate. The second shearing structure 5 is located in the second mixing chamber 112 and cooperates with the first shearing structure 4 to mix the slurry and flotation reagents.

[0030] When the slurry enters the first mixing chamber 111 through the bottom feed inlet 13, the drive mechanism 3 starts, causing the first shearing structure 4 installed in the mixing chamber 11 to start rotating at high speed. After being stirred in the first mixing chamber 111, the slurry flows upward and enters the second mixing chamber 112. After being sheared by the first shearing structure 4 and the second shearing structure 5, the mixture can be further thoroughly mixed to ensure uniformity. Finally, the slurry, after being thoroughly mixed and sheared, is discharged through the discharge outlet 14 and transported to the subsequent flotation cell for separation.

[0031] By incorporating a first shear structure 4 and a second shear structure 5, the mixing effect is significantly improved. When the slurry and flotation reagents enter the mixing chamber 11, the first shear structure 4 provides powerful dynamic shearing, while the second shear structure 5 enhances the shearing effect and turbulence intensity, preventing the slurry from rotating as a whole and ensuring uniform distribution of the reagents in the slurry and effective activation of the mineral particle surfaces. Through the synergistic effect of this device, fine mineral particles in the slurry can achieve high dispersion and full contact with the flotation reagents.

[0032] Meanwhile, the mixing chamber 11 is designed as a first mixing chamber 111 and a second mixing chamber 112 connected sequentially from bottom to top, in conjunction with the feed inlet 13 and the discharge outlet 14, to achieve continuous and staged mixing of the slurry and reagents. This structure helps to optimize the material flow path and ensure the stability and uniformity of the mixing process.

[0033] To facilitate understanding, further explanation is provided: In this embodiment, the pulp refers to the suspension formed by mixing crushed and ground ore with water. During flotation, the pulp serves as the carrier for the mineral particles to be separated. Flotation reagents are chemical substances added to the pulp during mineral flotation to alter the surface properties of mineral particles, making them selectively hydrophobic or hydrophilic. The type and dosage of flotation reagents have a decisive impact on the flotation effect.

[0034] In this embodiment, the mixing tank 1 is the main structure of the device, and its interior forms a mixing chamber 11 for containing the slurry and flotation reagents. The mixing tank 1 is typically made of corrosion-resistant material, capable of withstanding the abrasion of the slurry and the chemical action of the reagents, providing a sealed space for mixing the slurry and flotation reagents. The mixing tank 1 can adopt various structural forms; for example, it can be a simple cylindrical container or a container with a specific geometry to adapt to different process requirements.

[0035] In this embodiment, a support leg 12 is provided at the bottom of the mixing tank 1 to support the weight of the entire mixing tank 1 and fix it to the ground or bracket, ensuring the stability and safety of the device during operation. The support leg 12 can take the form of a steel structure, a concrete foundation, or an adjustable-height support leg, etc., to adapt to different installation environments and site requirements.

[0036] In this embodiment, the mixing chamber 11 is designed to be a first mixing chamber 111 and a second mixing chamber 112 connected together. The first mixing chamber 111 is the lower region of the mixing chamber 11, and the second mixing chamber 112 is the upper region of the mixing chamber 11. This segmented mixing chamber 11 structure allows for the gradual mixing of the slurry and flotation reagents.

[0037] In this embodiment, the second mixing chamber 112 is cylindrical. The cylindrical structure has good symmetry and uniformity, which is beneficial for efficient shearing and mixing operations. This shape provides a stable working space for the first shearing structure 4 and the second shearing structure 5, ensuring that the slurry and flotation reagents do not encounter dead zones after entering the second mixing chamber 112, facilitating the discharge of the mixed slurry from the mixing chamber 112. The cylindrical structure also facilitates the manufacture and installation of the internal shearing components.

[0038] Furthermore, the discharge port 14 can be located on the side wall of the second mixing chamber 112, preferably vertically, which helps the slurry form a smoother flow line upon discharge, reducing turbulence and material impact, thereby reducing the risk of wear and blockage. Its specific location and number can be adjusted according to the slurry flow rate and mixing requirements. For example, one or more discharge ports 14 can be provided to ensure that the slurry can be discharged uniformly from the mixing chamber 112.

[0039] In this embodiment, an observation port 15 is provided on the side wall of the second mixing chamber 112 for observing the mixing and shearing of the slurry inside the equipment during operation. The observation port 15 is typically equipped with a flange for connecting other components to achieve a seal.

[0040] Furthermore, the first mixing chamber 111 has a conical structure with a cross-section that gradually decreases from top to bottom. Material enters from the bottom of the cone, and the cross-section of the conical chamber gradually expands from bottom to top, forming a gradually widening channel to avoid dead zones at the bottom. Simultaneously, the inclined surface of the cone wall generates a radial force, pushing particles towards the central axis, concentrating the material near the stirring shaft, increasing the probability of contact with the stirring, and enhancing the mixing, crushing, or dispersing effects. Moreover, the inclined cone wall has a guiding function; material fed from the bottom is pushed upwards, and some material flows back down along the cone wall, re-entering the shear zone, achieving multiple cycles and improving processing uniformity.

[0041] In this embodiment, the feed inlets 13 are located near the bottom of the first mixing chamber 111, and at least two inlets are provided. Each feed inlet 13 is equipped with a valve. For example, the two feed inlets 13 can be circumferentially spaced 180 degrees apart and located on the arc-shaped sidewall of the first mixing chamber 111. Providing multiple feed inlets 13 increases the material entry channels, thereby improving feeding efficiency and speed. The valves precisely control the discharge flow rate of the slurry or completely close the feed inlets 13 when necessary. Commonly used valve types include ball valves, gate valves, butterfly valves, diaphragm valves, or pinch valves.

[0042] In this embodiment, the drive mechanism 3 is mounted on the mixing tank 1 to provide power to the first shearing structure 4. The drive mechanism 3 typically includes an electric motor, which is connected to the first shearing structure 4 via a coupling or belt drive. For example, the electric motor can be mounted on the top or side of the mixing tank 1.

[0043] In this embodiment, the second shear structure 5 is installed on the side wall of the second mixing chamber 112. The second shear structure 5 extends along the axial direction of the output shaft of the drive mechanism 3, and has a first shearing portion 52 on the side facing the first shear structure 4. This installation method ensures that the second shear structure 5 is in direct contact with the slurry and flotation reagents flowing in the first mixing chamber 111, and forms a radial shearing action with the first shear structure 4. Its fixing method can be achieved through various means such as welding, bolt connection, and snap-fit ​​fixing to ensure its stability under high-speed shearing action.

[0044] In this embodiment, the second shearing structure 5 extends along the axial direction of the output shaft of the drive mechanism 3, which means that the length direction of the second shearing structure 5 is parallel or approximately parallel to the axial direction of the output shaft of the drive mechanism 3. This extension ensures that the second shearing structure 5 forms a sufficient shearing zone with the first shearing structure 4 at the axial height of the second mixing chamber 112, thereby providing continuous shearing action on the axially flowing slurry and flotation reagents.

[0045] Specifically, the second shearing structure 5 includes a support plate 51, one side of which is fixed to the peripheral wall of the second mixing chamber 112. The first shearing part 52 is located on the side of the support plate 51 away from the peripheral wall of the second mixing chamber 112. The first shearing part 52 can be designed with sharp edges, a serrated structure, a wavy profile, or a special surface with protrusions / recesses to enhance the shearing and dispersion effect on the fluid. The first shearing part 52 is located on the other side of the support plate 51, that is, on the side facing the central region of the second mixing chamber 112. This design allows the first shearing part 52 to directly and effectively interact with the first shearing structure 4 and the material being sheared, maximizing the shearing efficiency.

[0046] In this embodiment, multiple second shearing structures 5 are provided, and these multiple second shearing structures 5 are arranged at intervals along the circumference of the first mixing chamber 111. When the slurry and flotation reagent pass through the first mixing chamber 111, they can be repeatedly sheared and mixed at multiple angles, avoiding the problem of insufficient mixing or excessive shearing in local areas, thereby ensuring sufficient and uniform contact between the flotation reagent and the mineral particles.

[0047] In this embodiment, the first shearing structure 4 includes a rotating shaft 41, a first shearing component 42, and a second shearing component 43. The rotating shaft 41 is connected to the output shaft of the drive mechanism 3. The first shearing component 42 is mounted on the rotating shaft 41 and disposed in the first mixing chamber 111. The second shearing component 43 is mounted on the rotating shaft 41 and disposed in the second mixing chamber 112. The second shearing structure 5 is disposed opposite to the second shearing component 43.

[0048] In this embodiment, the first shearing assembly 42 and the second shearing assembly 43 are identical. Taking the first shearing assembly 42 as an example, further explanation is provided: the first shearing assembly 42 includes a first rotating shearing member 421 and a second rotating shearing member 422, which extend outward in an arc shape from the rotation axis 41. Multiple first shearing assemblies 42 and second shearing assemblies 43 can be provided, and they are staggered vertically along the axial direction of the rotation axis 41. This modular design allows for more precise structural adjustments to the shearing assemblies to adapt to different mixed shearing requirements. For example, shearing members of different shapes or materials can be combined according to the viscosity or particle size of the slurry.

[0049] In this embodiment, the arc-shaped extension structure helps generate more effective fluid shear force during rotation and guides the slurry and reagents to form specific flow patterns, thereby enhancing the mixing effect. For example, these shearing elements can be designed as blades or propellers with a certain curvature, the curvature of which can be optimized according to fluid dynamics principles to maximize shearing efficiency or reduce energy consumption. Specifically, second shearing portions 423 are provided on the upper and lower sides of the first rotating shearing element 421 and the upper and lower sides of the second rotating shearing element 422 to improve shearing capacity.

[0050] In this embodiment, the first rotating shear member 421 and the second rotating shear member 422 are detachably connected and can be easily separated and reassembled when needed. This detachability greatly facilitates the maintenance, cleaning, and component replacement of the equipment. For example, the detachable connection can be achieved by means of bolts, pins, clips, or quick-locking mechanisms.

[0051] In this embodiment, the first rotating shear member 421 and the second rotating shear member 422, when connected, form a cavity that covers the outer peripheral wall of the rotating shaft 41. By forming a cavity to cover the rotating shaft 41, the stability of the connection between the shear member and the rotating shaft 41 can be ensured, preventing loosening or detachment under high-speed rotation and high shear force. At the same time, this covering structure may also protect the rotating shaft 41, preventing it from directly contacting abrasive slurry and extending its service life. For example, the two shear members can be designed as semi-circular or arc-shaped grooves, which, when closed, form a circular or polygonal cavity that matches the outer diameter of the rotating shaft 41.

[0052] In this embodiment, the mixing chamber 11 further includes a third mixing chamber 113, which communicates with the first mixing chamber 111 and is located at the bottom of the first mixing chamber 111. The third mixing chamber 113 extends upward from the bottom of the first mixing chamber 111 to a certain height. The dosing assembly 2 delivers flotation reagent into the third mixing chamber 113.

[0053] By adding a third mixing chamber 113 to the first mixing chamber 11, connecting it to the first mixing chamber 111 and placing it at the bottom of the first mixing chamber 111, and simultaneously having the dosing assembly 2 deliver flotation reagents into the third mixing chamber 113, the addition method and mixing process of the flotation reagents are optimized. Since the third mixing chamber 113 extends upwards from the bottom of the first mixing chamber 111 to a certain height, it forms a mixing area with a specific volume. This allows the newly added flotation reagents to fully contact and mix within the relatively concentrated slurry flow, avoiding the problems of excessive dilution or uneven distribution of the reagents throughout the mixing chamber 11.

[0054] Furthermore, the rotating shaft 41 extends from the top of the mixing tank 1, passing sequentially through the second mixing chamber 112 and the first mixing chamber 111, into the third mixing chamber 113, and finally rotatably connects with the bottom of the first mixing chamber 111. The first shearing structure 4 includes a third shearing assembly 44, mounted on the rotating shaft 41 and located within the third mixing chamber 113. The third shearing assembly 44 has a third shearing section 441. When the dosing assembly 2 delivers flotation reagents into the third mixing chamber 113, the third shearing assembly 44, located within this chamber, rotates at high speed under the drive of the rotating shaft 41, intensely shearing and stirring the slurry and flotation reagents entering the third mixing chamber 113. Based on the original structure of the mixing chamber 11, enhanced mixing is performed in the area of ​​the third mixing chamber 113, significantly improving the mixing efficiency and utilization rate of the reagents.

[0055] Because the first shearing assembly 42 is closer to the output end of the drive mechanism 3 than the third shearing assembly 44, the third shearing assembly 44 can provide greater power. Within the third mixing chamber 113, the flotation reagents and slurry can be thoroughly mixed, resulting in more uniform contact and better performance. For thorough mixing, the third shearing section 441 is sharper than the second shearing section 423, providing a better shearing effect on the slurry.

[0056] In this embodiment, the third mixing chamber 113 includes a top plate 1131 and side plates 1133. The top plate 1131 has a through hole 1132 for connecting the second mixing chamber 112 and allowing the rotating shaft 41 to pass through. The side plates 1133 are disposed between the bottom wall of the top plate 1131 and the second mixing chamber 112, and multiple side plates 1133 are provided and spaced apart circumferentially along the top plate 1131. A flow channel 1134 is provided between two adjacent side plates 1133.

[0057] The flow and mixing of the slurry are optimized by incorporating a specific structure within the third mixing chamber 113. The flow channels 1134 formed between two adjacent side plates 1133 force the slurry to flow along these pre-defined channels after entering the third mixing chamber 113, thereby extending the residence time of the slurry within the chamber and increasing the contact opportunities between the slurry and flotation reagents. This structural design effectively guides the flow of the slurry, avoids short-circuiting, and ensures that the flotation reagents are fully and uniformly mixed with the slurry, thus improving mixing efficiency and flotation performance.

[0058] Furthermore, a partition plate 6 is provided between the first mixing chamber 111 and the second mixing chamber 112, and the partition plate 6 has multiple screening holes 61. This effectively controls the flow rate and direction of the slurry from the first mixing chamber 111 to the second mixing chamber 112, achieving preliminary screening of the slurry and ensuring that only slurry that has been fully mixed and has a suitable particle size can enter the second mixing chamber 112. This significantly reduces the occurrence of slurry short-circuiting and prevents insufficiently mixed coarse particles from entering the subsequent mixing stage prematurely, thereby greatly improving the mixing uniformity and mixing efficiency of the slurry.

[0059] In this embodiment, each screening hole 61 is radially distributed from the center to the edge of the partition plate 6, that is, it is evenly or non-uniformly distributed outward from the center of the partition plate 6. This distribution helps to achieve uniform distribution and passage of slurry on the partition plate 6, avoiding excessively fast or slow flow rates in local areas, thereby improving screening efficiency and mixing uniformity.

[0060] In this embodiment, the partition plate 6 has a first extension 62, and the second mixing chamber 112 has a second extension 1121. The first extension 62 and the second extension 1121 are fitted together and fastened together by fasteners. The fasteners can be standard parts such as bolts, nuts, and rivets, and can be used with gaskets to enhance the sealing effect. This connection method ensures the stable installation of the partition plate 6 in the first mixing chamber 111, preventing it from shifting or loosening under the flow and shearing action of the slurry, while also ensuring the sealing between the mixing chambers 11.

[0061] In this embodiment, the dosing assembly 2 includes a first pipe section 21 and a second pipe section 22. The first pipe section 21 is inclined downwards and extends from the outside of the mixing tank 1 through the first mixing chamber 111 to the third mixing chamber 113. The second pipe section 22 is vertically arranged, with one end connected to the first pipe section 21. A reagent storage assembly 23 is provided at the end of the second pipe section 22 away from the first pipe section 21. The reagent storage assembly 23 is used to store flotation reagents and control the supply of reagents. The second pipe section 22 and the reagent storage assembly 23 are located outside the mixing tank 1, which facilitates the operator's addition, storage management, and metering of reagents.

[0062] In this embodiment, the slurry enters the first mixing chamber 111 through the feed inlet 13. The dosing assembly 2 directly delivers the flotation reagent to the third mixing chamber 113. The slurry then enters the third mixing chamber 113 through the flow channel 1134, where primary mixing is achieved under the action of the third shear assembly 44. After primary mixing, the slurry enters the first mixing chamber 111 for secondary mixing. Slurry meeting the particle size requirements enters the second mixing chamber 112 through the sieve holes 61. Under the combined action of the first shear structure 4 and the second shear structure 5, tertiary mixing is performed, and finally, the slurry is discharged through the discharge port 14. This multi-stage mixing enhances the binding efficiency between mineral particles and reagents, thereby improving the recovery rate of the target mineral and the flotation selectivity. The third mixing chamber 113 provides a longer residence time and a more concentrated mixing area for sufficient contact and reaction between the flotation reagent and the slurry, thus improving the utilization efficiency of the flotation reagent.

[0063] Because the slurry has a certain viscosity, it easily adheres to the sidewalls of the mixing chamber 11. When the slurry adheres to the sidewalls, it deviates from the mainstream mixing flow field, preventing it from fully contacting and reacting with the flotation reagents, resulting in insufficient mineral reagent modification. Simultaneously, the accumulated material on the walls disrupts the mixing flow field, weakens reagent dispersion, and causes material retention and deterioration, ultimately leading to a decline in the overall separation performance of the feed slurry, significantly reducing flotation efficiency, and also affecting slurry discharge efficiency. Therefore, timely removal of the slurry adhering to the sidewalls is of great importance.

[0064] To address the aforementioned problems, further improvements are made to the mixing and shearing device for mineral flotation: In this embodiment, the second shearing structure 5 has a first working state: in a fixed state, it cooperates with the first shearing structure 4 to perform shearing; and a second working state: in a rotating state, it scrapes the inner wall of the mixing chamber 11.

[0065] When the slurry enters the first mixing chamber 111, the high-speed rotation of the first shear structure 4 generates strong shear force in the slurry. Simultaneously, the second shear structure 5 is in its first working state, i.e., fixed. The second shear structure 5 disrupts the overall rotating flow field of the slurry, creating a localized high-shear region and intense turbulence between the first and second shear structures 4 and 5. This combination of dynamic and static shear components allows the flotation reagents to be rapidly and thoroughly dispersed into the slurry, forming smaller reagent droplets and significantly increasing the contact area and collision frequency between the reagents and mineral particles. Furthermore, the second shear structure 5 can be adjusted to a second working state, i.e., rotating, to scrape the inner wall of the mixing chamber 11, removing slurry adhering to the wall surface, ensuring uniform slurry preparation, stabilizing operating efficiency, and guaranteeing overall flotation performance.

[0066] By designing the second shearing structure 5 into two working states, one dynamic and one static, it can both cooperate with the first shearing structure 4 to achieve the purpose of mixing and shearing, and also achieve the purpose of scraping the side wall of the mixing chamber 11. Thus, the design of the second shearing structure 5 stabilizes the operating efficiency and improves the overall flotation effect.

[0067] Specifically, the second shearing structure 5 has a scraping part 53 on the side opposite to the first shearing part 52. In this embodiment, the scraping part 53 and the first shearing part 52 are located on opposite sides of the support plate 51. The scraping part 53 can be an end of the support plate 51, or it can be an integral or detachable shovel-type scraping head formed at the end of the support plate 51, or it can be provided with an elastic scraper at the end of the support plate 51. Since the scraping part 53 and the first shearing part 52 are located on opposite sides of the support plate 51, they can operate independently without interference during the execution of the first and second working states.

[0068] When the second shearing structure 5 is in the first working state, it is in a fixed state, meaning the first shearing part 52 is also in a fixed state. The first shearing part 52 functions, working in conjunction with the first shearing structure 4 to perform shearing, thereby improving the shearing effect. When the second shearing structure 5 is in the second working state, it is in a rotating state, meaning it rotates along the circumference of the mixing chamber 11. During this rotation, the scraping part 53 scrapes the inner wall of the mixing chamber 11 to remove the slurry adhering to the wall surface, preventing the overall flotation effect from being affected by the slurry adhesion.

[0069] In this embodiment, the second shearing structure 5 switches between a first working state and a second working state by rotating the output shaft of the drive mechanism 3 in both forward and reverse directions. This way, only one drive mechanism 3 is used, which can provide power to the first shearing assembly 42, the second shearing assembly 43, and the third shearing assembly 44, as well as power the rotation of the second shearing structure 5, reducing the number of drive sources while meeting operational requirements. Furthermore, the second shearing structure 5 can switch its working state simply and efficiently by rotating the output shaft of the drive mechanism 3 in both directions.

[0070] Specifically, a support ring 7 is rotatably mounted on the inner wall of the mixing chamber 11, and each second shearing structure 5 is mounted on the inner circumferential surface of the support ring 7. The support ring 7 rotates circumferentially along the inner wall of the mixing chamber 11. The support ring 7 is disposed on the side wall of the second mixing chamber 112, and the support ring 7 is disposed opposite to the second shearing assembly 43.

[0071] In this embodiment, the second shearing structure 5 operates in the following ways: the support ring 7 is fixed; and in the second working state, the support ring 7 rotates circumferentially along the inner wall of the mixing chamber 11. The rotation of the support ring 7 drives the second shearing structure 5 to rotate circumferentially along the inner wall of the second mixing chamber 112, thereby achieving the scraping purpose of the second shearing structure 5.

[0072] In this embodiment, to improve the stability of the second shear structure 5 during rotation, the connection position between the support plate 51 and the support ring 7 is preferably located at or near the center. This ensures the uniformity of force distribution on the upper and lower ends of the support plate 51.

[0073] In this embodiment, the second shearing structure 5 takes the support plate 51 as an example. There are multiple ways to fix the support plate 51: it can be welded so that the support plate 51 and the support ring 7 form an integral structure; or it can be detachable, such as bolted connection, which facilitates the installation and disassembly of the support plate 51. During maintenance, when the scraping part 53 is severely worn, only the second shearing structure 5 needs to be replaced, which reduces maintenance costs.

[0074] In this embodiment, in order to reduce the influence of the support ring 7 during the flotation process, an installation groove 114 extending circumferentially along the mixing chamber 11 is provided on the inner sidewall of the mixing tank 1, and the support ring 7 is embedded in the installation groove 114. That is, an installation groove 114 extending circumferentially is provided on the sidewall of the second mixing chamber 112.

[0075] Specifically, the support ring 7 is placed into the mounting groove 114, which supports and limits the support ring 7, ensuring that the support ring 7 can rotate stably along the circumference of the mixing chamber 11. The support ring 7 has a retaining groove 86, which is recessed towards the outer circumference of the support ring 7. When installing the support plate 51, it can be fixed by the retaining groove 86, which is flexible for installation and easy for disassembly.

[0076] In this embodiment, preferably, the inner circumferential surface of the support ring 7 is flush with the inner sidewall surface of the second mixing chamber 112, so as to avoid the support ring 7 protruding and to avoid the support ring 7 obstructing the flow in the second mixing chamber 112.

[0077] In this embodiment, to reduce the friction between the support ring 7 and the mixing tank 1 during rotation, thereby reducing wear on both and extending their service life, ball bearings, rollers, or similar components can be installed between the support ring 7 and the mounting groove 114 to convert sliding friction into rolling friction. Alternatively, a wear-resistant bushing can be installed on the support ring 7 to reduce its wear rate.

[0078] In this embodiment, since the support ring 7 is a ring structure, in order to facilitate the placement of the support ring 7 into the mounting groove 114, the support ring 7 can be designed as a splicing structure, that is, the support ring 7 is divided into multiple arc-shaped units, and the units are connected by means of snap-fit, etc. A stepped stop structure can be set at the segment joint, combined with local thickening and external circumferential restraint structure, to effectively improve the shear and torsional strength of the splicing position, avoid segment misalignment and cracking during operation, and ensure the overall structural rigidity and operational stability of the support ring 7.

[0079] In this embodiment, a gear ring 71 is provided on the outer peripheral wall of the support ring 7. The transmission assembly 8 includes a transmission rod 85, a transmission wheel 82, a transmission mechanism 83, and a one-way bearing 84, wherein the one-way bearing 84 is mounted on the output shaft of the drive mechanism 3. Specifically, the inner ring of the one-way bearing 84 is fixedly connected to the output shaft of the drive mechanism 3, and the outer ring of the one-way bearing 84 is fixedly connected to the transmission wheel 82. The transmission rod 85 is rotatably mounted on the mixing tank 1 and is arranged along the extension direction of the output shaft of the drive mechanism 3. The drive gear 81 is fixedly mounted on the transmission rod 85 and meshes with the gear ring 71 on the outer peripheral surface of the support ring 7. The transmission rod 85 is connected to the transmission wheel 82 through the transmission mechanism 83. The transmission mechanism 83 can be a belt drive mechanism 83, a chain drive mechanism 83, etc.

[0080] Since the rotating shaft 41 is directly connected to the output shaft of the drive mechanism 3, the rotating shaft 41 can maintain rotation regardless of whether the output shaft of the drive mechanism 3 rotates forward or backward. However, due to the unidirectional connection of the one-way bearing 84, the output shaft of the drive mechanism 3 can only drive the support ring 7 to rotate in one direction through the transmission assembly 8.

[0081] When the output shaft of the drive mechanism 3 rotates forward, it drives the support ring 7 to rotate circumferentially along the inner wall of the second mixing chamber 112. When the output shaft of the drive mechanism 3 rotates in reverse, the support ring 7 is in a fixed state. Specifically, since the output shaft of the drive mechanism 3 is fixedly connected to the inner ring of the one-way bearing 84, when the output shaft of the drive mechanism 3 rotates forward, it can drive the inner ring of the one-way bearing 84 to rotate. In this direction of rotation, the inner and outer rings of the one-way bearing 84 are locked, forming an integral structure. This directly drives the transmission wheel 82 on the outer ring to rotate, which in turn drives the transmission rod 85 to rotate through the transmission mechanism 83, thereby driving the drive gear 81 to rotate, and the support ring 7 rotates accordingly. When the output shaft of the drive mechanism 3 rotates in reverse, the inner and outer rings of the one-way bearing 84 are relatively independent. Only the inner ring rotates, and it does not drive the outer ring to rotate, thus failing to drive the support ring 7 to rotate.

[0082] Similarly, when the output shaft of the drive mechanism 3 reverses, the support ring 7 rotates circumferentially along the inner wall of the second mixing chamber 112; when the output shaft of the drive mechanism 3 rotates forward, the support ring 7 is in a fixed state. The only difference between this scheme and the above scheme is the selection of different types of one-way bearings 84. Specifically, since the output shaft of the drive mechanism 3 and the inner ring of the one-way bearing 84 are fixedly connected, when the output shaft of the drive mechanism 3 reverses, it can drive the inner ring of the one-way bearing 84 to rotate. In this direction of rotation, the inner and outer rings of the one-way bearing 84 are locked, forming an integrated structure. This directly drives the transmission wheel 82 on the outer ring to rotate, which in turn drives the transmission rod 85 to rotate via the transmission mechanism 83, thereby driving the drive gear 81 to rotate, and the support ring 7 rotates accordingly. When the output shaft of the drive mechanism 3 rotates forward, the inner and outer rings of the one-way bearing 84 are relatively independent; only the inner ring rotates, and it does not drive the outer ring to rotate, thus preventing the support ring 7 from rotating.

[0083] By setting up a support ring 7, a drive gear 81, a transmission wheel 82, a transmission rod 85, and a transmission assembly 8, and simultaneously setting a gear ring 71 on the support ring 7, a stable transmission path is formed between the output shaft of the drive mechanism 3 and the support ring 7. This ensures that when switching to the second working state of the second shearing structure 5, the second shearing structure 5 can rotate stably in the circumferential direction, improving the stability during the scraping process. At the same time, the special characteristics of the one-way bearing 84 are ensured, improving the stability of the second shearing structure 5 when switching back and forth between the first and second working states. Moreover, even during the mixed shearing process, due to the impact of the slurry on the support plate 51, the support plate 51 tends to rotate. Due to the unidirectional rotation of the one-way bearing 84, rotation in the other direction will produce a locking effect, thereby preventing the support plate 51 from rotating in the opposite direction.

[0084] In this embodiment, to protect the drive gear 81 and the transmission rod 85, the inner wall of the mixing tank 1 also has a mounting chamber 115. The mounting chamber 115 is located inside the side wall of the second mixing chamber 112, and both the drive gear 81 and the transmission rod 85 are located inside the mounting chamber 115. Of course, for ease of installation and maintenance, an inspection port can be provided on the outer peripheral wall of the mixing tank 1, which communicates with the mounting chamber 115.

[0085] In one implementation, the transmission mechanism 83, transmission wheel 82, and one-way bearing 84 can be located outside the mixing chamber 11. That is, one end of the transmission rod 85 is rotatably connected to the side wall of the mixing tank 1, and the other end extends to the outside of the mixing tank 1, for example, to the top of the mixing tank 1. The output shaft of the drive mechanism 3 has a certain extension length, allowing the one-way bearing 84 to be located between the drive mechanism 3 and the top of the mixing tank 1. In this case, the transmission mechanism 83 connects the ends of the transmission wheel 82 and the transmission rod 85, placing the transmission mechanism 83 outside the mixing tank 1. This prevents the adhesion of slurry, reagents, etc., during mixing and shearing, protecting the transmission mechanism 83, transmission wheel 82, and one-way bearing 84, and improving stability and service life.

[0086] In another implementation, the transmission mechanism 83, the transmission wheel 82, and the one-way bearing 84 can be disposed in the second mixing chamber 112. By providing a protective cover, the transmission mechanism 83, the transmission wheel 82, and the one-way bearing 84 are enclosed in an independent space. During mixing and shearing, this can also prevent the adhesion of slurry, reagents, etc., thereby achieving a protective effect.

[0087] By setting up the drive mechanism 3 and the one-way bearing 84, the output shaft of the drive mechanism 3 can drive the first shearing structure 4 to rotate regardless of whether it rotates forward or backward. However, due to the one-way bearing 84, the output shaft of the drive mechanism 3 can only rotate in one direction, which can drive the second shearing structure 5 to rotate. In this way, two different mechanisms can be driven to work through one drive mechanism 3, reducing the number of drive sources. At the same time, by using the forward and reverse rotation of the output shaft of the drive mechanism 3 and the one-way bearing 84, the switching between different working states can be achieved.

[0088] When the slurry and flotation reagents enter the first mixing chamber 111, the high-speed rotation of the first shear structure 4 generates strong shearing forces in the slurry. Simultaneously, the second shear structure 5 is in its first working state, i.e., in a fixed state. The second shear structure 5 disrupts the overall rotating flow field of the slurry, creating a localized high-shear region and intense turbulence between the first shear structure 4 and the second shear structure 5. This combination of dynamic and static shear components allows the flotation reagents to be rapidly and thoroughly dispersed into the slurry, forming smaller reagent droplets and significantly increasing the contact area and collision frequency between the reagents and mineral particles. Furthermore, the second shear structure 5 can be adjusted to a second working state, i.e., in a rotating state, to scrape the inner wall of the second mixing chamber 112, removing adhering slurry, ensuring uniform slurry preparation, stabilizing operating efficiency, and guaranteeing overall flotation performance.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-mentioned technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of this application.

Claims

1. A mixing and shearing device for mineral flotation, characterized in that: include A mixing tank (1) has a mixing chamber (11) for mixing slurry and flotation reagents; The mixing chamber (11) is connected to the inlet (13) and the outlet (14); The dosing assembly (2) is used to deliver flotation reagents into the mixing chamber (11); The drive mechanism (3) is mounted on the mixing tank (1); The first shearing structure (4) is located in the mixing chamber (11) and is driven to rotate by the driving mechanism (3); The second shearing structure (5) is located inside the mixing chamber (11); The second shearing structure (5) has a first working state: in a fixed state, it cooperates with the first shearing structure (4) to perform shearing; and a second working state: in a rotating state, it scrapes the inner wall of the mixing chamber (11).

2. The mixing and shearing device for mineral flotation according to claim 1, characterized in that: The second shearing structure (5) extends along the axial direction of the output shaft of the drive mechanism (3); The second shearing structure (5) has a first shearing portion (52) on the side facing the first shearing structure (4); The second shearing structure (5) has a scraping part (53) on the side opposite to the first shearing part (52); The first working state of the second shearing structure (5): the second shearing structure (5) is in a fixed state, and the first shearing part (52) and the first shearing structure (4) cooperate to perform shearing; The second working state of the second shearing structure (5): The second shearing structure (5) rotates circumferentially along the inner sidewall of the mixing chamber (11), and the scraping part (53) scrapes the inner sidewall of the mixing chamber (11).

3. The mixing and shearing apparatus for mineral flotation according to claim 1 or 2, characterized in that: The second shearing structure (5) switches between the first working state and the second working state by the forward and reverse rotation of the output shaft of the drive mechanism (3).

4. The mixing and shearing device for mineral flotation according to claim 3, characterized in that: A support ring (7) is rotatably provided on the inner wall of the mixing chamber (11); The support ring (7) rotates circumferentially along the inner wall of the mixing chamber (11); The second shear structure (5) is fixed on the support ring (7); The first working state of the second shearing structure (5): the support ring (7) is fixed; the second working state: the support ring (7) rotates circumferentially along the inner wall of the mixing chamber (11).

5. The mixing and shearing apparatus for mineral flotation according to claim 4, characterized in that: A one-way bearing (84) is provided on the output shaft of the drive mechanism (3); The one-way bearing (84) is connected to the support ring (7) via a transmission assembly (8); When the output shaft of the drive mechanism (3) rotates forward, the support ring (7) rotates circumferentially along the inner wall of the mixing chamber (11); When the output shaft of the drive mechanism (3) reverses, the support ring (7) is in a fixed state; Or when the output shaft of the drive mechanism (3) reverses, the support ring (7) rotates circumferentially along the inner wall of the mixing chamber (11); When the output shaft of the drive mechanism (3) rotates forward, the support ring (7) is in a fixed state.

6. The mixing and shearing apparatus for mineral flotation according to claim 5, characterized in that: A toothed ring (71) is provided on the outer peripheral wall of the support ring (7); The transmission assembly (8) includes The transmission rod (85) is rotatably mounted on the mixing tank (1) and is arranged along the extension direction of the output shaft of the drive mechanism (3); The drive gear (81) is fixed on the transmission rod (85) and meshes with the gear ring (71) of the support ring (7) for transmission. The inner ring of the one-way bearing (84) is fixedly connected to the output shaft of the drive mechanism (3); The outer ring of the one-way bearing (84) is fixedly provided with a transmission wheel (82); The transmission rod (85) is connected to the transmission mechanism (83) and the transmission wheel (82) through transmission.

7. The mixing and shearing apparatus for mineral flotation according to claim 6, characterized in that: The inner wall of the mixing tank (1) is provided with an installation groove (114) extending circumferentially along the mixing chamber (11); The support ring (7) is located in the mounting groove (114), and the inner circumferential surface of the support ring (7) is flush with the inner surface of the mixing chamber (11); The mixing tank (1) also has an installation chamber (115) on its inner side wall; The drive gear (81) and transmission rod (85) are both located in the mounting chamber (115).

8. The mixing and shearing apparatus for mineral flotation according to claim 4, characterized in that: The mixing chamber (11) includes a first mixing chamber (111) and a second mixing chamber (112) that are connected sequentially from bottom to top; A partition plate (6) is provided between the first mixing chamber (111) and the second mixing chamber (112); The partition plate (6) has multiple screening holes (61); The feed inlet (13) is connected to the first mixing chamber (111); The discharge port (14) is connected to the second mixing chamber (112); The support ring (7) and the second shear structure (5) are both located in the second mixing chamber (112).

9. The mixing and shearing apparatus for mineral flotation according to claim 8, characterized in that: The first shear structure (4) includes The rotating shaft (41) is fixedly connected to the output shaft of the drive mechanism (3); The rotating shaft (41) is rotatably connected to the mixing tank (1) and extends from the top of the mixing tank (1) through the second mixing chamber (112) and the first mixing chamber (111) in sequence; The first shearing assembly (42) is mounted on the rotating shaft (41) and disposed in the first mixing chamber (111); The second shearing assembly (43) is mounted on the rotating shaft (41) and disposed in the second mixing chamber (112); The support ring (7) and the second shear structure (5) are both arranged opposite to the second shear assembly (43).

10. The mixing and shearing apparatus for mineral flotation according to claim 9, characterized in that: The mixing chamber (11) includes The third mixing chamber (113) is connected to the first mixing chamber (111) and is located at the bottom of the first mixing chamber (111); The dosing assembly (2) delivers flotation reagents into the third mixing chamber (113); The rotating shaft (41) extends into the third mixing chamber (113) until it is rotatably connected to the bottom of the first mixing chamber (111); The first shear structure (4) includes The third shearing assembly (44) is mounted on the rotating shaft (41) and located in the third mixing chamber (113).

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