A nelson concentrator for the gravity separation of gold concentrates

Abstract

This utility model relates to the field of mineral processing equipment technology and provides a Nelson mineral processing machine for gold concentrate gravity separation. It includes a base, a housing on the base, an outer cone inside the housing, an inner cone extending into the outer cone from its lower side embedded in the upper surface of the outer cone, a spiral groove on the inner wall of the inner cone, and multiple back-blowing water holes communicating with the interior of the outer cone at the bottom of the inner cone. A rotating shaft is located on the lower surface of the outer cone, and a back-blowing water groove communicating with the interior of the outer cone is located on the upper surface of the rotating shaft. The lower end of the rotating shaft rotates through the lower surface of the housing. A drive assembly for controlling the rotation of the rotating shaft is located on the outer side of the housing. Two parallel first mounting plates are located on the bottom wall of the outer cone. This utility model uses a filter screen to catch falling gold concentrate, preventing it from falling onto the rotating shaft and clogging the back-blowing water outlet, or falling directly into the back-blowing water pipe through the rotating shaft, thus affecting the gold concentrate gravity separation effect.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing equipment technology, and more specifically, it relates to a Nelson mineral processing machine for gravity separation of gold concentrate. Background Technology

[0002] The Nelson concentrator is a high-efficiency centrifugal mineral processing device suitable for separating precious metals such as gold, silver, and platinum group metals from ores and other solid materials. Its traditional structure consists of two concentric cones, with a sealed water chamber between the outer and inner cones. The inner wall of the inner cone has several discontinuous grooves and back-blowing water holes arranged in a specific pattern. During operation, the double concentric cones rotate, generating centrifugal acceleration. The slurry is fed to the bottom of the inner cone and, under the action of centrifugal acceleration, is thrown towards the inner cone's sidewall and moves upwards along it. Simultaneously, back-blowing water... Water is injected into the inner cone through the backflush water hole, causing the slurry near the backflush water hole to become fluidized. Under the action of centrifugal acceleration, individual gold or other high-density precious metal particles can overcome the radial resistance of the backflush water, enter the sealed water cavity, and accumulate in the concentrate. Other ore components, due to their lower density, are unable to overcome the radial resistance of the backflush water under the action of centrifugal acceleration. As a result, under the combined action of the radial force of the backflush water and the axial component of the centrifugal acceleration, they move along the inner cone wall towards the upper part of the inner cone and are eventually discharged from the inner cone, completing the separation of gold, silver, and platinum group metals from the ore.

[0003] A search of existing patent CN215507260U reveals a Nelson mineral processing machine. In this prior art, when the slurry passes through the backflush water holes, individual gold or other high-density precious metal particles overcome the radial resistance of the backflush water and enter the sealed water chamber. Under the action of the outer cone wall and centrifugal acceleration, the individual gold or other high-density precious metal particles entering the sealed water chamber are enriched at the outer cone wall at the bottom of the sealed water chamber and are continuously discharged through the concentrate outlet. Other ore components, due to their lower density, are unable to overcome the radial resistance of the backflush water under the action of centrifugal acceleration. As a result, under the action of the axial component of centrifugal acceleration and vibration, they continue to rotate along the spiral groove and move towards the upper part of the inner cone, and are finally discharged from the inner cone.

[0004] However, the inventors believe that the existing technology has certain drawbacks: In the existing technology, the backflush water is sprayed out through the rotating shaft. Therefore, the backflush water nozzle on the rotating shaft is located directly below the backflush water hole of the outer cone. When the single gold or other high-density precious metal particles overcome the radial resistance of the backflush water and fall downwards, these metal particles will also fall directly onto the backflush water nozzle on the rotating shaft under the action of gravity. This makes it very easy for metal particles to block the backflush water nozzle, resulting in a reduction in the impact force of the upward-sprayed backflush water, and thus a reduction in the resistance to the slurry. This will cause some low-density particles to enter the sealed water chamber, thus affecting the gravity separation effect of gold concentrate or other high-density precious metal particles. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a Nelson concentrator for gold concentrate gravity separation that will not cause blockage of the backflush water nozzle.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A Nelson concentrator for gold concentrate gravity separation includes a base, a housing on the base, an outer cone inside the housing, an inner cone extending into the outer cone from its lower side embedded in the upper surface of the outer cone, a spiral groove on the inner wall of the inner cone, and multiple back-blowing water holes communicating with the interior of the outer cone at the bottom of the inner cone. A rotating shaft is mounted on the lower surface of the outer cone, and a back-blowing water groove communicating with the interior of the outer cone is mounted on the upper surface of the rotating shaft. The lower end of the rotating shaft rotatably extends through the lower surface of the housing. A drive assembly for controlling the rotation of the rotating shaft is mounted on the outer side of the housing. Two parallel first mounting plates are mounted on the bottom wall of the outer cone, and a rotating shaft is rotatably connected between the two first mounting plates. A collection frame is rotatably connected to the rotating shaft. The inner wall of the right side of the collection frame is inclined, and a filter screen is mounted on the inner ring of the collection frame. The filter screen is located between the back-blowing water groove of the rotating shaft and the bottom of the inner cone.

[0008] The present invention is further configured such that: a backflush water pipe is provided on the base, the upper end of the backflush water pipe is rotatably inserted into the backflush water tank, the other end of the backflush water pipe is connected to the pump body, and a feed pipe with its lower end inserted into the inner cone is provided on the top of the housing.

[0009] The present invention is further configured such that: the driving component includes a driving motor, the driving motor is disposed on the outer surface of the housing, the output shaft of the driving motor is disposed downward, a pulley is disposed at the lower end of the output shaft of the driving motor, a pulley is also sleeved on the outer surface of the lower end of the rotating shaft, and a transmission belt is connected between the two pulleys.

[0010] The present invention is further configured such that: an isolation ring is provided inside the shell, the isolation ring is rotatably sleeved on the outer surface of the bottom of the outer cone, a tailings baffle is provided inside the shell on the upper side of the isolation ring, the tailings baffle is inclined, the tops of the outer cone and the inner cone both rotatably penetrate through the upper surface of the tailings baffle, and a tailings pipe communicating with the interior is provided near the bottom of the tailings baffle in the shell.

[0011] The present invention is further configured such that: two parallel second mounting plates are provided on the bottom wall of the outer cone, both second mounting plates are located on the left side of the rotation axis, a connecting slide rod is provided between the two second mounting plates, a connecting sleeve is slidably fitted on the outer surface of the connecting slide rod, a first rotating plate is hinged between the upper surface of the connecting sleeve and the left side of the collection frame, and a spring is movably fitted on the outer surface of the connecting slide rod between the right side surface of the connecting sleeve and the second mounting plate.

[0012] The present invention is further configured such that: a third mounting plate is provided on the bottom wall of the outer cone, a fan blade is rotatably connected to the third mounting plate, one side of the fan blade extends to the top of the back-blowing water tank of the rotating shaft, a sleeve shaft is provided on the front side of the fan blade, the sleeve shaft is located at the eccentricity of the fan blade, a second rotating plate is rotatably sleeved on the sleeve shaft, a push rod is hinged to the other side of the second rotating plate, and the other end of the push rod is connected to the right side surface of the connecting sleeve.

[0013] The present invention is further configured such that: a hinge seat is provided on the inner left side of the collection frame, a swing plate is rotatably connected to the hinge seat, and a striking ball that can strike the filter screen is provided on the lower side of the swing plate.

[0014] The advantages of this utility model are:

[0015] Firstly, this utility model uses a filter screen to catch the falling gold concentrate, preventing the gold concentrate from falling onto the rotating shaft and causing blockage of the backflush water outlet, or falling directly into the backflush water pipe through the rotating shaft, thus affecting the re-separation effect of the gold concentrate.

[0016] Secondly, by controlling the collection frame to swing up and down, the gold concentrate falling on the filter screen can quickly fall onto the bottom wall of the outer cone, thus minimizing the impact of excessive gold concentrate falling on the filter screen and affecting the impact force of the backflush water, and ensuring the stability of the equipment operation. Attached Figure Description

[0017] Figure 1 This is a front view plan of a Nelson mineral processing machine for gravity separation of gold concentrate according to this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0020] Figure 4 for Figure 3 Enlarged view of point C.

[0021] In the diagram: 1. Base; 2. Housing; 3. Drive motor; 31. Pulley; 32. Drive belt;

[0022] 4. Outer cone; 5. Inner cone; 6. Feed pipe; 7. Rotating shaft; 8. Backflush water pipe; 9. Tailings baffle; 10. Isolation ring; 11. First mounting plate; 12. Rotating shaft; 13. Collection frame; 14. Filter screen; 15. Second mounting plate; 16. Connecting slide rod; 17. Connecting sleeve; 18. Spring; 19. First rotating plate; 20. Push rod; 21. Second rotating plate; 22. Hinge seat; 23. Swing plate; 24. Striking ball; 25. Third mounting plate; 26. Fan blade. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please see Figure 1-4 The present invention provides the following technical solution:

[0026] Specifically, it refers to a Nelson concentrator for gold concentrate gravity separation, comprising a base 1, a housing 2 mounted on the base 1, a damping structure between the housing 2 and the base 1, an outer cone 4 inside the housing 2, an inner cone 5 extending downward into the upper surface of the outer cone 4, a spiral groove on the inner wall of the inner cone 5, multiple back-blowing water holes communicating with the interior of the outer cone 4 at the bottom of the inner cone 5, a through groove communicating with the interior of the outer cone 4 on the outer surface of the bottom of the outer cone 4, and a rotating shaft 7 mounted on the lower surface of the outer cone 4. The lower end of the rotating shaft 7 rotates through the lower surface of the housing 2. A vibrator (not shown in the figure) is provided on the outer surface of the lower end of the rotating shaft 7. A drive assembly for controlling the rotation of the rotating shaft 7 is provided on the outer side of the housing 2. A backflush water pipe 8 is provided on the base 1. A backflush water groove communicating with the interior of the outer cone 4 is opened on the upper surface of the rotating shaft 7. The upper end of the backflush water pipe 8 rotates through the backflush water groove. The other end of the backflush water pipe 8 is connected to the pump body. A feed pipe 6 with its lower end penetrating into the inner cone 5 is provided on the top of the housing 2.

[0027] During operation, the rotating shaft 7 rotates, causing the inner cone 5 and outer cone 4 to rotate synchronously, generating centrifugal acceleration. The slurry is fed into the bottom of the inner cone 5 through the feed pipe 6. Under the action of centrifugal acceleration, it is thrown into the continuous spiral grooves on the side wall of the inner cone 5. The vibrator drives the inner cone 5 to vibrate at high speed. Under the combined action of centrifugal acceleration and vibration, the solid particles in the slurry separate the higher density precious metal particles (such as gold concentrate) from the lower density other components. The single gold or other higher density precious metal particles are deposited at the bottom of the spiral grooves and move upwards along the spiral grooves towards the inner cone 5. When the slurry in the spiral groove passes through the backflush water hole, the individual gold or other high-density precious metal particles overcome the radial resistance of the backflush water and enter the outer cone 4. Under the action of centrifugal acceleration, the individual gold or other high-density precious metals that enter the outer cone 4 are enriched at the bottom of the sealed water chamber on the outer cone 4 wall and are continuously discharged through the channel. Other ore components, due to their lower density, are unable to overcome the radial resistance of the backflush water under the action of centrifugal acceleration. As a result, under the action of the axial component of centrifugal acceleration and vibration, they continue to rotate along the spiral groove and move towards the upper part of the inner cone 5, and are finally discharged from the inner cone 5.

[0028] The drive assembly includes a drive motor 3, which is mounted on the outer surface of the housing 2. The output shaft of the drive motor 3 is positioned downwards, and a pulley 31 is mounted on the lower end of the output shaft of the drive motor 3. A pulley 31 is also mounted on the outer surface of the lower end of the rotating shaft 7. A transmission belt 32 is connected between the two pulleys 31.

[0029] When in use, the drive motor 3 starts, and the output shaft of the drive motor 3 controls the pulley 31 to rotate. Therefore, the pulley 31 on the right side rotates synchronously under the drive of the transmission belt 32, thereby controlling the rotation of the rotating shaft 7.

[0030] An isolation ring 10 is provided inside the shell 2. The isolation ring 10 is rotatably sleeved on the outer surface of the bottom of the outer cone 4. A tailings baffle 9 is provided inside the shell 2 above the isolation ring 10. The tailings baffle 9 is inclined. The tops of the outer cone 4 and the inner cone 5 both rotatably penetrate through the upper surface of the tailings baffle 9. A tailings pipe communicating with the interior is provided near the bottom of the tailings baffle 9 in the shell 2. Therefore, the tailings discharged through the inner cone 5 fall onto the tailings baffle 9. Since the tailings baffle 9 is inclined, these tailings can slide to the tailings pipe and are finally discharged from the tailings pipe.

[0031] Two parallel first mounting plates 11 are provided on the bottom wall of the outer cone 4. Both first mounting plates 11 are located on the right side of the backflush water tank of the rotating shaft 7. A rotating shaft 12 is rotatably connected between the two first mounting plates 11. A collection frame 13 is rotatably connected to the rotating shaft 12. The inner wall of the right side of the collection frame 13 is inclined. A filter screen 14 is provided in the inner ring of the collection frame 13. The filter screen 14 is located between the backflush water tank of the rotating shaft 7 and the bottom of the inner cone 5. The area of ​​the filter screen 14 is larger than that of the backflush water tank and the bottom surface of the inner cone 5. The area allows the gold concentrate that falls through the backflush water hole at the bottom of the inner cone 5 to fall onto the filter screen 14, preventing the gold concentrate from falling onto the rotating shaft 7 and causing blockage of the backflush water outlet, or falling directly into the backflush water pipe through the rotating shaft 7, which would affect the reseparation effect of the gold concentrate. At the same time, because the filter screen 14 has a lot of mesh holes, when the backflush water is sprayed upward through the rotating shaft 7, it will not form too much obstruction to the backflush water, ensuring the radial resistance effect of the backflush water on the low-density ore.

[0032] Two parallel second mounting plates 15 are provided on the bottom wall of the outer cone 4. Both second mounting plates 15 are located on the left side of the rotating shaft 7. A connecting slide rod 16 is provided between the two second mounting plates 15. A connecting sleeve 17 is slidably sleeved on the outer surface of the connecting slide rod 16. A first rotating plate 19 is hinged between the upper surface of the connecting sleeve 17 and the left side of the collecting frame 13. A spring 18 is movably sleeved on the outer surface of the connecting slide rod 16 between the right side surface of the connecting sleeve 17 and the second mounting plate 15.

[0033] When the spring 18 is not compressed, the spring 18 will exert a thrust on the connecting sleeve 17, so that the initial position of the connecting sleeve 17 is on the left side of the connecting slide rod 16. At this time, the first rotating plate 19 will exert a thrust on the collection frame 13, so that the collection frame 13 is tilted.

[0034] A third mounting plate 25 is provided on the bottom wall of the outer cone 4. A fan blade 26 is rotatably connected to the third mounting plate 25. One side of the fan blade 26 extends to the top of the back-blowing water tank of the rotating shaft 7. A sleeve shaft is provided on the front of the fan blade 26. The sleeve shaft is located at the eccentric part of the fan blade 26. A second rotating plate 21 is rotatably mounted on the sleeve shaft. A push rod 20 is hinged to the other side of the second rotating plate 21. The other end of the push rod 20 is connected to the right side surface of the connecting sleeve 17.

[0035] During use, the backflush water is sprayed out through the rotating shaft 7. At this time, the backflush water comes into contact with the blades on one side of the fan blade 26, thereby driving the fan blade 26 to rotate. Simultaneously, the second rotating plate 21 rotates synchronously with the fan blade 26. Since the sleeve shaft is located at the eccentric position of the fan blade 26, the second rotating plate 21 can generate tension and thrust on the push rod 20, causing the connecting sleeve 17 to slide on the connecting rod 16. At the same time, the spring 18 contracts or stretches. When the connecting sleeve 17 slides on the surface of the connecting rod 16, the connecting sleeve 17 will generate thrust or tension on the first rotating plate 19. At this time, the first rotating plate 19 can push the collection frame 13 to swing up and down. At this time, the gold concentrate falling on the filter screen 14 can quickly fall onto the bottom wall of the outer cone 4, minimizing the impact of too much gold concentrate falling on the filter screen 14 and affecting the impact force of the backflush water, thus ensuring the stability of the equipment operation.

[0036] A hinge seat 22 is provided on the inner left side of the collection frame 13. A swing plate 23 is rotatably connected to the hinge seat 22. A striking ball 24 is provided on the lower side of the swing plate 23, which can strike the filter screen 14. The striking ball 24 is made of rubber. When the collection frame 13 swings up and down, the striking ball 24 can drive the swing plate 23 to swing up and down under the action of inertia. This causes the striking ball 24 to continuously strike the surface of the filter screen 14, causing the filter screen 14 to vibrate. Therefore, the gold concentrate that falls on the filter screen 14 can be quickly discharged.

[0037] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A Nelson concentrator for gold concentrate gravity separation, comprising a base (1), a housing (2) disposed on the base (1), an outer cone (4) disposed inside the housing (2), an inner cone (5) extending into the outer cone (4) on the upper surface of the outer cone (4), a spiral groove being formed on the inner wall of the inner cone (5), a plurality of back-blowing water holes communicating with the interior of the outer cone (4) being formed at the bottom of the inner cone (5), a rotating shaft (7) being disposed on the lower surface of the outer cone (4), a back-blowing water groove communicating with the interior of the outer cone (4) being formed on the upper surface of the rotating shaft (7), the lower end of the rotating shaft (7) rotating through the lower surface of the housing (2), and a drive assembly for controlling the rotation of the rotating shaft (7) being disposed on the outer side of the housing (2), characterized in that: The bottom wall of the outer cone (4) is provided with two parallel first mounting plates (11), and a rotating shaft (12) is rotatably connected between the two first mounting plates (11). A collection frame (13) is rotatably connected on the rotating shaft (12). The inner wall of the right side of the collection frame (13) is set in an inclined shape. A filter screen (14) is provided in the inner ring of the collection frame (13). The filter screen (14) is located between the rotating shaft (7) backflush water tank and the bottom of the inner cone (5).

2. The Nelson concentrator for gold concentrate gravity separation according to claim 1, characterized in that: The base (1) is provided with a backflush water pipe (8), the upper end of which rotates and penetrates into the backflush water tank, and the other end of which is connected to the pump body. The top of the housing (2) is provided with a feed pipe (6) whose lower end penetrates into the inner cone (5).

3. The Nelson concentrator for gold concentrate gravity separation according to claim 1, characterized in that: The drive assembly includes a drive motor (3), which is mounted on the outer surface of the housing (2). The output shaft of the drive motor (3) is positioned downwards, and a pulley (31) is mounted on the lower end of the output shaft of the drive motor (3). A pulley (31) is also mounted on the outer surface of the lower end of the rotating shaft (7). A transmission belt (32) is connected between the two pulleys (31).

4. The Nelson concentrator for gold concentrate gravity separation according to claim 1, characterized in that: An isolation ring (10) is provided inside the shell (2). The isolation ring (10) is rotatably sleeved on the outer surface of the bottom of the outer cone (4). A tailings baffle (9) is provided inside the shell (2) on the upper side of the isolation ring (10). The tailings baffle (9) is inclined. The tops of the outer cone (4) and the inner cone (5) rotatably penetrate through the upper surface of the tailings baffle (9). A tailings pipe communicating with the interior is provided near the bottom of the tailings baffle (9) in the shell (2).

5. The Nelson concentrator for gold concentrate gravity separation according to claim 1, characterized in that: Two parallel second mounting plates (15) are provided on the bottom wall of the outer cone (4). A connecting slide rod (16) is provided between the two second mounting plates (15). A connecting slide sleeve (17) is slidably sleeved on the outer surface of the connecting slide rod (16). A first rotating plate (19) is hinged between the upper surface of the connecting slide sleeve (17) and the left side of the collection frame (13). A spring (18) is movably sleeved on the outer surface of the connecting slide rod (16) between the right side surface of the connecting slide sleeve (17) and the second mounting plate (15).

6. The Nelson concentrator for gold concentrate gravity separation according to claim 5, characterized in that: A third mounting plate (25) is provided on the bottom wall of the outer cone (4). A fan blade (26) is rotatably connected to the third mounting plate (25). One side of the fan blade (26) extends to the top of the back-blowing water tank of the rotating shaft (7). A sleeve shaft is provided on the front of the fan blade (26). The sleeve shaft is located at the eccentric part of the fan blade (26). A second rotating plate (21) is rotatably mounted on the sleeve shaft. A push rod (20) is hinged to the other side of the second rotating plate (21). The other end of the push rod (20) is connected to the right side surface of the connecting sleeve (17).

7. The Nelson concentrator for gold concentrate gravity separation according to claim 6, characterized in that: A hinge seat (22) is provided on the inner left side of the collection frame (13), and a swing plate (23) is rotatably connected to the hinge seat (22). A striking ball (24) that can strike the filter screen (14) is provided on the lower side of the swing plate (23).

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