An anti-blocking thickener for discharging materials in ore dressing

Abstract

The present invention belongs to the technical field of thickeners, and specifically relates to an anti-blocking discharge thickener for ore dressing, which includes a thickener main body. A support frame is fixedly installed in the middle of the top of the thickener main body. A drive shaft is rotatably installed on the support frame. A drive device for driving the drive shaft to rotate is provided at the top of the support frame; a rake frame assembly is rotatably installed below the support frame through the drive shaft. The rake frame assembly includes a cross beam. A plurality of concentric rings are provided below the cross beam. Vertical rods are fixedly installed below the plurality of rings. Scrapers are fixedly installed at the bottoms of the vertical rods. The bottom ends of the scrapers are in contact with the inner wall of the bottom of the thickener main body. A connection assembly is provided on the cross beam to control the connection or separation of the rings and the cross beam through the connection assembly; by setting the connection assembly in the present invention, a plurality of scrapers are connected to the cross beam in batches, so that the load on the drive device gradually increases, avoiding the excessive resistance that may be brought about during sudden startup and reducing the risk of burnout.

Description

Technical Field

[0001] The present invention belongs to the technical field of thickeners, and specifically relates to an anti-blocking discharge thickener for ore dressing. Background Art

[0002] A deep cone thickener is an important device widely used in the field of mineral processing, mainly for solid-liquid separation. In the prior art, a deep cone thickener usually consists of a conical trough body, a feeding device, a rake frame, a scraper, a driving device, etc. The pulp is fed into the conical trough body through the feeding device and enters the compression area in the trough body for compression, flocculation and sedimentation. The clarified overflow water is discharged through the overflow weir at the upper part of the trough body, while the high-concentration underflow at the bottom is discharged from the bottom of the cone. The rake frame drives the scraper to rotate through the driving device, pushing the concentrated pulp towards the center of the trough body to prevent sediment blockage. During the operation of the deep cone thickener, the rake frame rotates to make the suspended particles in the pulp sink and distribute evenly, and at the same time channels the water inside the pulp layer to the upper part. This process can not only effectively increase the concentration of the pulp, but also improve the efficiency of solid-liquid separation.

[0003] The invention patent with the publication number CN116899279B discloses an intelligent ore dressing thickener. The key points of its technical solution are: including a thickener, a feeder, a stirring rod and a support column, etc.; a feeder for pulp feeding is installed on the thickener; a support column is installed at the center of the top cover of the thickener. The invention realizes sampling of pulp at different levels by collecting the pulp through the second feeding pipes arranged on each sampling layer and sending it into the first feeding pipe, which can improve the data accuracy and prevent more caking of the pulp outside the sampling layer caused by single-layer sampling, affecting the normal operation of the equipment.

[0004] However, the above technologies often have the following defects: in the existing design, the stirring rod is fixed at the bottom of the central rotating shaft. When solid particles in the pulp settle and accumulate at the bottom of the thickener, the stirring rod will be subject to a large resistance during rotation, which causes the driving device to bear a large load when starting. The excessive load will cause the driving device to be prone to overload operation during the initial start-up, increasing the risk of burnout, thus affecting the normal operation and service life of the equipment. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art, the present invention provides an anti-blocking discharge thickener for ore dressing.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an anti-blocking discharge thickener for ore dressing, including a thickener main body, a support frame is fixedly installed in the middle at the top of the thickener main body, a driving shaft is rotatably installed on the support frame, and a driving device for driving the driving shaft to rotate is arranged at the top of the support frame;

[0007] A rake frame assembly is rotatably installed below the support frame through a drive shaft. The rake frame assembly includes a cross beam. A plurality of concentric rings are provided below the cross beam. A plurality of vertical rods are fixed below the rings. A scraper is fixed at the bottom of the vertical rod. The bottom end of the scraper is attached to the inner wall of the bottom of the thickener body. A connection assembly is provided on the cross beam to control the connection or separation of the ring and the cross beam.

[0008] Preferably, the connection assembly includes a rotating rod installed at the top of the ring. The lower end surface of the cross beam is evenly provided with limit guide rails. A plurality of the rings are respectively movably installed inside the limit guide rails. A through groove is provided on the cross beam and above the limit guide rails. An activity cavity is provided inside the top of the through groove. A baffle is slidably installed in the activity cavity. Two springs one for resetting are symmetrically installed below both sides of the baffle. An electromagnet is installed below the baffle.

[0009] Preferably, the scraper is composed of a fixed frame, a reinforcing rod and an elastic plate. The fixed frame is fixedly connected to the bottom of the vertical rod. Elastic plates are respectively fixed on both sides of the fixed frame. Reinforcing rods are fixed on both sides of the fixed frame and inside the elastic plates. A knocking rod is slidably installed in the middle of the reinforcing rod. A spring three for resetting is sleeved on the knocking rod. The rotating rod penetrates through the middle hole of the vertical rod and extends into the fixed frame. A turntable is fixed at the bottom of the rotating rod through a connecting rod. A top rod is fixed at the top edge of the turntable. An activity block is slidably sleeved on the connecting rod. The activity block is a cylinder with an inclined bottom. A magnet is fixed on the side of the activity block. The magnet can attract the knocking rod. An impeller is fixed at the top of the rotating rod.

[0010] Preferably, the limit guide rail is composed of two symmetrically arranged L-shaped limit plates. The ring is movably arranged between the two limit plates on both sides. A notch one allowing the vertical rod to pass through is provided at the bottom of the two limit plates on both sides. A notch two allowing the rotating rod to pass through is provided at the bottom of the through groove.

[0011] Preferably, a guide hole is provided at the top of the activity block. A guide rod is slidably installed in the guide hole. The top end of the guide rod is fixedly connected to the fixed frame. A spring two is sleeved on the guide rod.

[0012] Preferably, a circular feed box is fixed in the middle below the support frame. A buffer box is fixed on the side of the feed box. A vertical cylinder is fixed at the bottom of the feed box. A feed pipe is installed below the support frame. The end of the feed pipe extends above the buffer box.

[0013] Preferably, a partition board is fixed between the buffer box and the feed box.

[0014] Preferably, the drive shaft penetrates through the vertical cylinder. A material distribution plate is fixed on the drive shaft. The material distribution plate is adjacent to the bottom of the vertical cylinder.

[0015] Preferably, the distance between the side wall of the movable block and the reinforcing rod is greater than the maximum extension length of the third spring.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. For the anti-blocking thickener for discharging materials in ore dressing of the present invention, by arranging the rake frame assembly to stir the pulp, so as to promote the suspension particles in the pulp to sink and be evenly distributed. By arranging the connecting assembly to connect the ring and the corresponding scraper to the cross beam one by one from the inside to the outside. As the scraper starts one by one from the inside out, since the scraper in the inner circle has started to rotate and clean part of the particles, the resistance is small. And the sediment in the outer circle slowly moves towards the middle along the inclined bottom surface, and the accumulation of the sediment on the outer circle scraper gradually decreases, and the resistance at startup will not be too large. Therefore, this step-by-step startup method will keep the driving force required for the rotation of each layer of scraper in a relatively stable and balanced state, so that the load on the driving device gradually increases, avoiding the excessive resistance that may be brought about by sudden startup, thereby reducing the risk of burnout, so as to enable the normal operation of the equipment and help to extend the service life.

[0018] 2. For the anti-blocking thickener for discharging materials in ore dressing of the present invention, when the cross beam drives the ring to rotate together, the liquid inside the device flows and simultaneously drives the impeller to rotate, and then drives the rotating rod to rotate. The rotating rod drives the turntable and the ejector rod to rotate. The top end of the ejector rod contacts the inclined surface at the bottom of the movable block, and then drives the movable block to move up and down reciprocally. At the same time, the movable block drives the magnet to move up and down. When the magnet approaches the knocking rod, it attracts the knocking rod to move towards the middle of the scraper, and the third spring is stretched. When the magnet completely passes by and moves away from the knocking rod, the pulling force of the third spring is greater than the suction force of the magnet on the knocking rod. The third spring pulls the knocking rod back to its original position and knocks on the inner wall of the elastic plate, so that the elastic plate vibrates, and then the sediment is not easily attached to the outer wall of the scraper, so as to reduce the influence of the sediment resistance on the rotation of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of the present invention;

[0021] Figure 2 is a cross-sectional view of the present invention;

[0022] Figure 3 is Figure 2 a schematic enlarged view of the structure at A in

[0023] Figure 4 is another cross-sectional view of the present invention;

[0024] Figure 5 is Figure 4 a schematic enlarged view of the structure at B in

[0025] Figure 6 This is a cross-sectional view of the scraper of the present invention.

[0026] In the figure: 1. Thickener main body; 2. Support frame; 3. Driving shaft; 4. Cross beam; 5. Ring; 6. Feed pipe; 7. Vertical rod; 8. Scraper; 9. Feed box; 10. Buffer box; 11. Partition board; 12. Vertical cylinder; 13. Material distribution plate; 14. Limit guide rail; 15. Rotating rod; 16. Impeller; 17. Through groove; 18. First spring; 19. Electromagnetic block; 20. Baffle; 21. Fixed frame; 22. Second spring; 23. Guide rod; 24. Elastic plate; 25. Knocking rod; 26. Third spring; 27. Reinforcing rod; 28. Thrust rod; 29. Turntable; 30. Movable block; 31. Magnet. Specific embodiments

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] Embodiment 1: As Figures 1 to 6 shown, a discharge anti-blocking thickener for ore dressing according to an embodiment of the present invention includes a thickener main body 1. A support frame 2 is fixedly installed in the middle of the top of the thickener main body 1. A driving shaft 3 is rotatably installed on the support frame 2. A driving device for driving the driving shaft 3 to rotate is provided on the top of the support frame 2;

[0029] A rake assembly is rotatably installed below the support frame 2 through the driving shaft 3. The rake assembly includes a cross beam 4. A plurality of concentric rings 5 are provided below the cross beam 4. Vertical rods 7 are fixedly installed below the plurality of rings 5. A scraper 8 is fixedly installed at the bottom of the vertical rod 7. The bottom end of the scraper 8 is attached to the inner wall of the bottom of the thickener main body 1. A connection assembly is provided on the cross beam 4 to control the connection or separation of the ring 5 and the cross beam 4 through the connection assembly;

[0030] During operation, the pulp is transported into the thickener main body 1, and an appropriate flocculant is added to enable the pulp to flocculate and settle in the compression zone. The clarified water rises to the overflow weir and is discharged outward through the drain pipe. The high-concentration underflow is discharged outward from the discharge pipe at the bottom of the device; in addition, the driving device (the driving device is composed of existing technologies such as a motor and a reducer, which will not be elaborated here) can drive the rake assembly to rotate through the driving shaft 3. Among them, the cross beam 4 in the rake assembly can stir the pulp during the rotation process to promote the suspension particles in the pulp to sink and be evenly distributed. In addition, during the sedimentation process, the connection assembly can be controlled to connect the plurality of rings 5 to the cross beam 4 respectively, so that the cross beam 4 can drive the plurality of rings 5 and the vertical rods 7 and scrapers 8 below to rotate at the same time, thereby further releasing the moisture inside the pulp layer below to guide the moisture to the upper part;

[0031] When the sedimentation process is completed, it is necessary to discharge the solid particles sedimented at the bottom. To avoid a large resistance when the rake frame assembly moves as a whole at the same time, which may cause the driving device to be overloaded during startup and then lead to the risk of burnout. At this time, the ring 5 is connected to the cross beam 4 in sequence from the inside out through the connecting component, that is, the innermost ring 5 is first connected to the cross beam 4. At this time, the cross beam 4 can only drive the innermost ring 5 and the connected vertical rod 7 and scraper 8 below to rotate. The scraper 8 scrapes and guides the sediment at the innermost side into the middle discharge pipe. At this time, the amount of material scraped by the scraper 8 is relatively small, so the resistance received at the beginning is small, which means that the initially rotating scraper 8 does not need to overcome a large resistance; then the ring 5 and the cross beam 4 at the adjacent outer position are connected through the connecting component, and so on, gradually connecting multiple rings 5 to the cross beam 4. As the scraper 8 starts one by one from the inside out, since the inner scraper 8 has started to rotate to clean some particles and the resistance is small, and the sediment at the outer circle slowly moves towards the middle along the inclined bottom surface, the accumulation of sediment for the outer scraper 8 gradually decreases, and the resistance during startup will not be too large. Therefore, this step-by-step startup method will keep the driving force required for the rotation of each layer of scraper 8 in a relatively stable and balanced state, so that the load on the driving device gradually increases, avoiding the excessive resistance that may be brought during sudden startup, thereby reducing the risk of burnout, enabling the normal operation of the equipment and helping to extend the service life; in addition, by guiding the sediment at the bottom layer by layer through the scraper 8, the discharge amount at one time is small, so as to avoid blocking the discharge pipe.

[0032] The connecting component includes a rotating rod 15 installed on the top of the ring 5. The lower end surface of the cross beam 4 is evenly provided with limiting guide rails 14. A plurality of the rings 5 are respectively movably installed inside the limiting guide rails 14. A through groove 17 is opened on the cross beam 4 and above the limiting guide rails 14. An activity cavity is provided inside the top of the through groove 17. A baffle 20 is slidably installed in the activity cavity. Two symmetrically arranged springs 18 for resetting are installed below both sides of the baffle 20. An electromagnet 19 is installed below the baffle 20.

[0033] During operation, the ring 5 is limited by the limiting guide rail 14. When it is necessary to connect the ring 5 to the cross beam 4 one by one through the connecting component, the electromagnet 19 corresponding to the ring 5 is energized one by one from the inside out. The electromagnet 19 generates suction force, attracting the baffle 20 to move downward to the outside of the activity cavity. During the rotation of the cross beam 4, the baffle 20 is driven to move. When the baffle 20 contacts the rotating rod 15 on the top of the ring 5, it can synchronously push the corresponding ring 5 to rotate, so as to realize connecting the corresponding ring 5 to the cross beam 4 and rotating together with the cross beam 4.

[0034] The scraper 8 is composed of a fixed frame 21, a reinforcing rod 27 and an elastic plate 24. The fixed frame 21 is fixedly connected to the bottom of the vertical rod 7. Elastic plates 24 are respectively fixed on both sides of the fixed frame 21. Reinforcing rods 27 are fixed on both sides of the fixed frame 21 and inside the elastic plates 24. A knocking rod 25 is slidably installed in the middle of the reinforcing rod 27. A third spring 26 for resetting is sleeved on the knocking rod 25. The rotating rod 15 passes through the middle hole of the vertical rod 7 and extends into the fixed frame 21. A turntable 29 is fixed to the bottom of the rotating rod 15 through a connecting rod. A top rod 28 is fixed to the top edge of the turntable 29. A movable block 30 is slidably sleeved on the connecting rod. The movable block 30 is a cylinder with an obliquely cut bottom. A magnet 31 is fixed to the side of the movable block 30. The magnet 31 can attract the knocking rod 25. An impeller 16 is fixed to the top of the rotating rod 15;

[0035] During operation, when the cross beam 4 drives the ring 5 to rotate together, the liquid inside the device flows and simultaneously pushes the impeller 16 to rotate, thereby driving the rotating rod 15 to rotate. The rotating rod 15 drives the turntable 29 and the top rod 28 to rotate. The top of the top rod 28 contacts the bottom inclined surface of the movable block 30, thereby driving the movable block 30 to move up and down reciprocally. At the same time, the movable block 30 drives the magnet 31 to move up and down. When the magnet 31 approaches the knocking rod 25, it attracts the knocking rod 25 to move towards the middle of the scraper 8, and the third spring 26 is stretched. When the magnet 31 completely passes by and moves away from the knocking rod 25, the pulling force of the third spring 26 is greater than the suction force of the magnet 31 on the knocking rod 25. The knocking rod 25 is pulled back to its original position by the third spring 26 and knocks on the inner wall of the elastic plate 24, so that the elastic plate 24 vibrates, thereby making it difficult for sediment to adhere to the outer wall of the scraper 8, in order to reduce the influence of sediment resistance on the rotation of the scraper 8.

[0036] The limiting guide rail 14 is composed of two symmetrically arranged L-shaped limiting plates. The ring 5 is movably arranged between the two limiting plates. Notches one allowing the vertical rod 7 to pass through are provided at the bottoms of the two limiting plates. A notch two allowing the rotating rod 15 to pass through is provided at the bottom of the through groove 17; During operation, the ring 5 is limited by the two symmetrically arranged L-shaped limiting plates; By providing notch one and notch two, the ring 5 and the cross beam 4 can rotate relative to each other, enabling the cross beam 4 to drive the designated ring 5 to rotate and preventing the non-operating ring 5 from affecting the rotation of the cross beam 4.

[0037] A guide hole is provided at the top of the movable block 30. A guide rod 23 is slidably installed in the guide hole. The top of the guide rod 23 is fixedly connected to the fixed frame 21. A second spring 22 is sleeved on the guide rod 23; During operation, the movement direction of the movable block 30 is restricted through the cooperation of the guide rod 23 and the guide hole, so that the movable block 30 can only move up and down and will not rotate on its own; By providing the second spring 22, the movable block 30 can be reset, so that the movable block 30 is always in contact with the top rod 28.

[0038] A circular feed box 9 is fixedly installed in the middle below the support frame 2. A buffer box 10 is fixedly installed on the side of the feed box 9. A vertical cylinder 12 is fixedly installed at the bottom of the feed box 9. A feed pipe 6 is installed below the support frame 2, and the end of the feed pipe 6 extends above the buffer box 10. During operation, a pipeline for injecting flocculant (not shown in the figure) is arranged above the buffer box 10. When feeding materials, the pulp is introduced into the position of the buffer box 10 through the feed pipe 6, and at the same time, the flocculant is injected through the pipeline. The buffer box 10 buffers and dissipates the energy of the pulp, and at the same time enables the pulp and the flocculant to collide in the buffer box 10, so that the two are better mixed. Then the pulp enters the feed box 9 and then flows into the thickener main body 1 through the vertical cylinder 12 to complete the feeding work.

[0039] A partition plate 11 is fixedly installed between the buffer box 10 and the feed box 9. During operation, when the pulp enters the feed box 9 from the buffer box 10, it is blocked by the partition plate 11, so that the pulp generates a backflow, so that the pulp and the flocculant are better mixed. After the pulp and the flocculant are effectively mixed, they flow into the feed box 9 from the gaps at both ends of the partition plate 11 and are discharged downward.

[0040] The driving shaft 3 penetrates through the vertical cylinder 12, and a material distribution plate 13 is fixedly installed on the driving shaft 3. The material distribution plate 13 is adjacent to the bottom of the vertical cylinder 12. During operation, the pulp flows downward from the vertical cylinder 12 and, under the action of the material distribution plate 13, the slurry diffuses around in a parabolic trend, so that the pulp quickly settles and separates in the water.

[0041] Embodiment 2: As Figure 6 shown, compared with Embodiment 1, another implementation manner of the present invention is that the distance between the side wall of the movable block 30 and the reinforcing rod 27 is greater than the maximum extension length of the third spring 26. During operation, when the magnet 31 and the knocking rod 25 are opposite to each other, the knocking rod 25 will not be adsorbed to the magnet 31. When the knocking rod 25 is reset and knocks on the inner wall of the elastic plate 24 under the action of the third spring 26, the generated reverse force causes the knocking rod 25 to be vibrated again, so as to realize multiple knocking.

[0042] Working principle: When feeding materials, the pulp is introduced into the position of the buffer box 10 through the feed pipe 6, and at the same time, the flocculant is injected through the pipeline. The buffer box 10 buffers and dissipates the energy of the pulp, and at the same time enables the pulp and the flocculant to collide in the buffer box 10, so that the two are better mixed. Then the pulp enters the feed box 9 and then flows into the thickener main body 1 through the vertical cylinder 12 to complete the feeding work;

[0043] After that, the pulp flocculates and settles in the compression zone. The clarified water rises to the overflow weir and is discharged outward through the drain pipe, while the high-concentration underflow is discharged outward through the discharge pipe at the bottom of the device. In addition, through the driving device, the rake frame assembly can be driven to rotate by the driving shaft 3. Among them, the cross beam 4 in the rake frame assembly can stir the pulp during the rotation process to promote the suspension particles in the pulp to sink and be evenly distributed. In addition, during the settlement process, the connecting assembly can be controlled to connect multiple rings 5 to the cross beam 4 respectively, so that the cross beam 4 can drive multiple rings 5 and the vertical rods 7 and scrapers 8 below to rotate simultaneously, thereby further releasing the moisture inside the pulp layer below to guide the moisture to the upper part.

[0044] When the settlement process is completed, the solid particles settled at the bottom need to be discharged. In order to avoid the large resistance when the whole rake frame assembly moves simultaneously, which may cause the driving device to burn out due to excessive load during startup, at this time, the rings 5 are connected to the cross beam 4 from the inside out through the connecting assembly. That is, the innermost ring 5 is first connected to the cross beam 4. At this time, the cross beam 4 can only drive the innermost ring 5 and the connected vertical rod 7 and scraper 8 below to rotate. The scraper 8 scrapes and guides the innermost sediment into the middle discharge pipe. At this time, the amount of material scraped by the scraper 8 is relatively small, so the resistance received at the beginning is small. This means that the initially rotating scraper 8 does not need to overcome a large resistance. Then, the adjacent outer ring 5 and the cross beam 4 are connected through the connecting assembly, and so on, gradually connecting multiple rings 5 to the cross beam 4. As the scraper 8 starts one by one from the inside out, since the inner scraper 8 has started to rotate and clean some particles, the resistance is small, and the sediment of the outer ring slowly moves towards the middle along the inclined bottom surface, and the accumulation of sediment of the outer scraper 8 gradually decreases, and the resistance during startup will not be too large. Therefore, this step-by-step startup method can keep the driving force required for the rotation of each layer of scraper 8 in a relatively stable and balanced state, so that the load on the driving device gradually increases, avoiding the excessive resistance that may be brought about by sudden startup.

[0045] When the crossbeam 4 drives the ring 5 to rotate together, the liquid inside the device flows and simultaneously pushes the impeller 16 to rotate, thereby driving the rotating rod 15 to rotate. The rotating rod 15 drives the turntable 29 and the ejector rod 28 to rotate. The top end of the ejector rod 28 contacts the bottom inclined surface of the movable block 30, thereby driving the movable block 30 to reciprocate up and down. At the same time, the movable block 30 drives the magnet 31 to move up and down. When the magnet 31 approaches the knocking rod 25, it attracts the knocking rod 25 to move towards the middle of the scraping plate 8, and the third spring 26 is stretched. When the magnet 31 completely passes by and moves away from the knocking rod 25, the pulling force of the third spring 26 is greater than the suction force of the magnet 31 on the knocking rod 25. The knocking rod 25 is pulled back to its original position by the third spring 26 and knocks on the inner wall of the elastic plate 24, so that the elastic plate 24 generates vibration, thereby making it difficult for the sediment to adhere to the outer wall of the scraping plate 8, so as to reduce the influence of the sediment resistance on the rotation of the scraping plate 8.

[0046] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A discharge anti-blocking thickener for mineral processing, comprising a thickener body (1), a support frame (2) being fixed in the middle of the top of the thickener body (1), a drive shaft (3) being rotatably mounted on the support frame (2), and a drive device for driving the drive shaft (3) to rotate is provided at the top of the support frame (2); Features: A rake frame assembly is rotatably mounted below the support frame (2) via a drive shaft (3), the rake frame assembly comprising a crossbeam (4), a plurality of concentric circular rings (5) are arranged below the crossbeam (4), vertical rods (7) are fixed below the plurality of circular rings (5), a scraper (8) is fixed at the bottom of the vertical rod (7), the bottom end of the scraper (8) is in contact with the bottom inner wall of the thickener body (1), a connecting assembly is arranged on the crossbeam (4), and the connection or separation of the circular rings (5) and the crossbeam (4) is controlled by the connecting assembly; The connecting assembly comprises a rotating rod (15) mounted on the top of the circular ring (5); the lower end surface of the cross beam (4) is evenly distributed with limiting guide rails (14); a plurality of the circular rings (5) are movably mounted inside the limiting guide rails (14); a through slot (17) is provided on the cross beam (4) and above the limiting guide rails (14); a movable cavity is provided inside the top of the through slot (17); a baffle (20) is slidably mounted in the movable cavity; springs (18) for resetting the baffle (20) are symmetrically mounted below both sides of the baffle (20); and an electromagnetic block (19) is mounted below the baffle (20).

2. The anti-blocking thickener for mineral processing according to claim 1, characterized in that: The scraper (8) is composed of a fixed frame (21), a reinforcing rod (27) and an elastic plate (24). The fixed frame (21) is fixedly connected to the bottom of the vertical rod (7). The elastic plates (24) are respectively fixed on both sides of the fixed frame (21). The reinforcing rods (27) are fixed on both sides of the fixed frame (21) and located inside the elastic plates (24). A knocking rod (25) is slidably mounted in the middle of the reinforcing rod (27). The knocking rod (25) is sleeved with a spring (26) for returning the knocking rod to its original position. The rotating rod (25) is 15) passes through the middle hole of the vertical rod (7) and extends to the inside of the fixed frame (21); a rotating disk (29) is fixed to the bottom of the rotating rod (15) through a connecting rod; a top rod (28) is fixed to the top edge of the rotating disk (29); a movable block (30) is slidably sleeved on the connecting rod; the movable block (30) is a cylinder with an oblique bottom; a magnet (31) is fixed to the side of the movable block (30); the magnet (31) is capable of attracting the knocking rod (25); and an impeller (16) is fixed to the top of the rotating rod (15).

3. The anti-blocking thickener for mineral processing according to claim 1, characterized in that: The limiting guide rail (14) is composed of two symmetrically arranged L-shaped limiting plates, the circular ring (5) is movably arranged in the middle of the limiting plates on both sides, the bottom of the limiting plates on both sides is provided with a notch 1 for allowing the vertical rod (7) to pass through, and the bottom of the through groove (17) is provided with a notch 2 for allowing the rotating rod (15) to pass through.

4. The anti-blocking thickener for mineral processing according to claim 2, characterized in that: A guide hole is provided at the top of the movable block (30), a guide rod (23) is slidably installed in the guide hole, the top end of the guide rod (23) is fixedly connected to the fixed frame (21), and a second spring (22) is sleeved on the guide rod (23).

5. The anti-blocking thickener for mineral processing according to claim 1, characterized in that: A circular feed box (9) is fixed in the middle of the lower part of the support frame (2), a buffer box (10) is fixed on the side of the feed box (9), a vertical cylinder (12) is fixed at the bottom of the feed box (9), and a feed pipe (6) is installed below the support frame (2), and the end of the feed pipe (6) extends to the top of the buffer box (10).

6. The anti-blocking thickener for mineral processing according to claim 5, characterized in that: A partition plate (11) is fixed between the buffer box (10) and the feed box (9).

7. The anti-blocking thickener for ore dressing according to claim 5, characterized in that: The driving shaft (3) passes through the vertical cylinder (12), and a material distribution plate (13) is fixed on the driving shaft (3), and the material distribution plate (13) is adjacent to the bottom of the vertical cylinder (12).

8. The anti-blocking thickener for ore dressing according to claim 2, characterized in that: The distance between the side wall of the movable block (30) and the reinforcing rod (27) is greater than the maximum extension length of the spring three (26).

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