A tailings comprehensive recovery iron, lead and zinc treatment device

Abstract

This application relates to the field of mineral resource recovery and discloses a processing device for the comprehensive recovery of iron, lead, and zinc from tailings. The device includes a frame, with a magnetic separation mechanism fixedly installed at the top and a slurry preparation mechanism fixedly installed in the middle. A flotation mechanism is located at the bottom of the slurry preparation mechanism, and an inner and outer shaft drive assembly is installed inside the slurry preparation mechanism. By connecting the slurry discharge pipe of the magnetic separation mechanism to the feed hopper of the slurry preparation mechanism, the tailings slurry after magnetic separation can directly enter the subsequent slurry preparation and flotation processes without long-distance pipeline transportation and transfer pumping. Simultaneously, the inner and outer shaft drive assemblies synchronously drive the stirring paddle, the mud pusher, and the impeller inside the flotation tank, enabling slurry preparation, desliming, and flotation to be achieved through a single drive. This reduces the equipment's footprint, lowers operating energy consumption and costs, and integrates magnetic separation, slurry preparation, and flotation functions into a single device, thereby simplifying the comprehensive processing flow for tailings recovery.

Description

Technical Field

[0001] This invention relates to the field of mineral resource recycling technology, specifically to a processing device for the comprehensive recovery of iron, lead, and zinc from tailings. Background Technology

[0002] Tailings are solid wastes discharged during mineral processing. With the continuous development of mineral resources, the amount of tailings accumulated is increasing year by year. This not only occupies a large amount of land resources, but also causes resource waste and environmental pollution if the valuable metal elements (such as iron, lead, zinc, etc.) remaining in the tailings are discharged directly without being recycled.

[0003] Currently, the commonly used technologies for recovering valuable metals from tailings include magnetic separation and flotation. Magnetic separation uses the difference in the magnetic properties of minerals to separate them and is mainly used to recover iron-containing minerals from tailings. Flotation, on the other hand, uses the difference in the hydrophobicity of mineral surfaces to enrich minerals such as lead and zinc by carrying them with air bubbles.

[0004] However, in existing technologies, magnetic separation and flotation are independent processes. That is, magnetic separation is first completed in one device to obtain iron concentrate and magnetic tailings. Then, the magnetic tailings are slurryed and transported by transfer or pipeline to another independent flotation device for lead and zinc flotation recovery. This results in a lengthy tailings recovery process, large equipment footprint, and high operating costs. Therefore, it is necessary to propose a tailings comprehensive recovery iron, lead, and zinc treatment device to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a treatment device for the comprehensive recovery of iron, lead, and zinc from tailings, which solves the problems of lengthy recovery processes, large equipment footprint, and high operating costs when recovering multiple metals from tailings.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a tailings comprehensive recovery iron, lead and zinc treatment device, including a frame, a magnetic separation mechanism fixedly installed on the top of the frame, a slurry conditioning mechanism fixedly installed in the middle of the frame, a flotation mechanism provided at the bottom of the slurry conditioning mechanism, an inner and outer shaft drive assembly installed inside the slurry conditioning mechanism, and an extension shaft assembly installed at the bottom of the inner and outer shaft drive assembly.

[0007] The slurry conditioning mechanism includes a slurry conditioning tank, a mud pusher, and a stirring paddle. The inner and outer shaft drive assembly includes a drive motor, an inner shaft connected to the output shaft of the drive motor, an outer shaft rotatably sleeved outside the inner shaft, and a gear set disposed between the inner shaft and the outer shaft. The flotation mechanism includes a flotation tank and an impeller disposed inside the flotation tank.

[0008] The mud-pushing impeller is fixedly connected to the bottom outer wall of the outer shaft and is positioned at the liquid surface of the slurry mixing tank. The stirring impeller is fixedly connected to the bottom outer wall of the inner shaft and is positioned inside the slurry mixing tank. The inner shaft and the outer shaft rotate in opposite directions at different speeds through a gear set.

[0009] The extension shaft assembly is fixedly installed at the bottom end of the inner shaft and extends into the flotation mechanism, and is fixedly installed with the impeller inside the flotation cell.

[0010] Preferably, the magnetic separation mechanism includes a magnetic separation tank, a magnetic separation drum, a feed hopper located at the top of one side of the magnetic separation tank, an iron material discharge hopper located on the other side of the magnetic separation tank, and a slurry discharge pipe located at the bottom of the magnetic separation tank. A de-agglomeration component is fixedly installed inside the magnetic separation tank.

[0011] The de-clumping component is a backwash pipe with a water outlet, one end of which is connected to an external water source. The water outlet of the backwash pipe is located on one side of the bottom of the magnetic separator drum, and the water outlet direction is opposite to the rotation direction of the magnetic separator drum. The backwash pipe is located above the highest liquid level in the magnetic separator tank.

[0012] Preferably, the slurry preparation mechanism further includes a feed hopper, a baffle plate, and a water supply pipe;

[0013] The feed hopper is fixedly installed on the top side of the slurry mixing tank and vertically set at the bottom of the slurry discharge pipe of the magnetic separator. The partition is fixedly connected to the inside of the side of the slurry mixing tank and forms a feeding channel extending to the bottom of the slurry mixing tank between the partition and the feed hopper.

[0014] The water supply pipe is fixedly installed on one side of the partition, and one end of the water supply pipe is connected to an external water source. The outlet of the water supply pipe is located on the top side of the slurry mixing tank. A demagnetizing component is fixedly installed inside the feed hopper.

[0015] Preferably, the demagnetizing assembly includes a demagnetizing cylinder, an inner cylinder, and;

[0016] The demagnetizing cylinder is fixedly installed inside the feed hopper, and the inner cylinder is fixedly installed inside the demagnetizing cylinder. The winding is arranged on the outside of the inner cylinder, and its two ends are connected to the positive and negative poles of AC power.

[0017] Preferably, the inner and outer shaft drive assembly further includes a fixed box, which is fixedly installed on one side of the frame and mounted on the top of the slurry mixing tank. The gear set is rotatably installed inside the fixed box, and the drive motor is fixedly installed on the top of the fixed box. Both the inner and outer shafts are rotatably installed inside the fixed box via bearings.

[0018] The gear set includes a main gear, same-stage gears, transmission gears, reverse gears, and linkage gears;

[0019] The main gear is fixedly connected to the top outer wall of the inner shaft, and the same level gear is meshed on one side of the main gear. The transmission gear is coaxially installed with the same level gear and is located at the bottom of the same level gear. The reverse gear is rotatably installed inside the fixed box and is meshed between the transmission gear and the linkage gear. The linkage gear is fixedly connected to the top outer wall of the outer shaft.

[0020] Preferably, a shaft sealing assembly is provided on the outside of the outer shaft, and dynamic sealing assemblies are symmetrically arranged between the inner shaft and the outer shaft. A mechanical sealing assembly is provided between the inner shaft and the slurry mixing tank, and a separation fluid supply system is connected to one side of the shaft sealing assembly and the mechanical sealing assembly through a pipeline.

[0021] Preferably, the shaft sealing assembly includes a movable seal, an outer cylinder, and a liquid inlet.

[0022] The movable seal is located between the inner shaft and the outer cylinder. The liquid inlet holes are equidistantly opened through the outer wall of the outer shaft and are correspondingly located on the inner side of the outer cylinder.

[0023] Preferably, the movable seal includes a slip ring, a sealing ring, and a sealing ring;

[0024] The sealing ring is fixedly connected to the inner wall of the outer cylinder, the sealing ring is filled inside the sealing ring, the slip ring is fixedly connected to the outer wall of the inner shaft, and one side of the sealing ring abuts against the outer wall of the slip ring.

[0025] The movable seals are symmetrically arranged on the inner sides of both ends of the outer cylinder, and a liquid isolation area is formed between the inner shaft, the movable seals and the outer cylinder. The outer cylinder is fixedly installed inside the slurry mixing tank by a fixing plate. The internal structure of the dynamic sealing assembly is the same as that of the movable seals. A liquid isolation filling area is formed between the dynamic sealing assembly, the inner shaft and the outer shaft.

[0026] Preferably, the mechanical seal assembly includes a top cover, a static sealing ring, a dynamic sealing ring, a spring compensator, a bottom cover, a bushing, and a spline groove;

[0027] The top cover is fixedly installed on the inner bottom wall of the slurry mixing tank, and the static sealing ring is fixedly connected to the inside of the top cover. The dynamic sealing ring is rotatably set at the bottom of the static sealing ring and is fixedly connected to the inner shaft. The spring compensation component is abutted at the bottom of the dynamic sealing ring.

[0028] The bottom annular part of the spring compensator is engaged with the outer wall of the bushing and rotates synchronously with the bushing. The spline groove is opened at the bottom end of the inner shaft, and the bushing is provided with a spline that matches the spline groove.

[0029] The bushing spline is sleeved on the outside of the inner shaft, and the bottom cover is fixedly installed on the bottom of the top cover by a flange and sleeved on the outside of the spring compensator and the bushing.

[0030] The extension shaft assembly includes a top flange sleeve, a bottom flange sleeve, and an extension shaft.

[0031] The top flange sleeve is splined and fitted onto the bottom end of the inner shaft, and abuts against the bottom end of the bushing. The top flange sleeve is flanged and flanged with the bottom flange sleeve, and the extension shaft spline is engaged with the bottom end of the bottom flange sleeve. The bottom end of the extension shaft is fixedly installed to the impeller, and the bottom end of the extension shaft is rotatably installed on the inner bottom wall of the flotation cell.

[0032] Preferably, the isolation fluid supply system includes an accumulator, a replenishment pump, a water tank, and a pressure sensor;

[0033] The accumulator is divided into an isolation liquid zone and a nitrogen zone by a piston. The pressure sensor is fixedly installed on the top inner side of the accumulator. The water tank is fixedly installed on one side of the slurry tank. The pumping end of the replenishment pump is connected to the water tank through a pipe, and the outlet end of the replenishment pump is connected to the isolation liquid zone of the accumulator through a pipe.

[0034] The isolation fluid zone of the accumulator is fixedly connected to one side of the bottom cover and one side of the outer cylinder through pipes, so that the isolation fluid enters the dynamic sealing assembly, the space between the inner shaft and the outer shaft to form an isolation fluid filling area, as well as the gap between the top cover, the bottom cover and the bushing.

[0035] Working principle: After tailings are mixed with water to form a slurry, it enters the magnetic separation mechanism. The magnetic separation drum adsorbs iron-containing particles in the permanent magnet zone. As the drum rotates to the non-magnetic zone, the iron-containing particles are discharged with the help of flushing water, thus realizing the recovery of iron concentrate. The tailings slurry after magnetic separation enters the demagnetization component. The demagnetization component is connected to an alternating current to form an alternating magnetic field, eliminating the residual magnetism of weakly magnetic particles in the slurry. This is to avoid the residual magnetic force causing fine mineral agglomeration, which would affect the subsequent flotation effect. The demagnetized slurry enters the slurry conditioning tank. The drive motor drives the inner shaft to rotate. The inner shaft drives the outer shaft to rotate in the opposite direction at a differential speed through a gear set, so that the outer shaft fixed at the bottom of the inner shaft rotates at a different speed. The stirring paddles rapidly agitate and adjust the slurry, while the mud pusher fixed to the bottom of the outer shaft slowly reverses at the liquid surface to stabilize the liquid flow and push the floating fine mud towards the overflow outlet for discharge. The bottom of the inner shaft is connected to the impeller inside the flotation tank via an extension shaft assembly. When the inner shaft rotates, it synchronously drives the impeller to rotate, drawing in air and dispersing the air bubbles into the slurry. The air bubbles are carried to the surface and then scraped off by the scraper, completing the lead-zinc flotation recovery. Sealing components are installed between the inner and outer shafts and between the shaft and the tank wall. The isolation liquid supply system continuously supplies isolation liquid to the sealed area and maintains positive pressure to prevent slurry from seeping in.

[0036] This invention provides a treatment device for the comprehensive recovery of iron, lead, and zinc from tailings. It has the following beneficial effects:

[0037] 1. This invention connects the slurry discharge pipe of the magnetic separation mechanism with the feed hopper of the slurry conditioning mechanism, so that the tailings slurry after magnetic separation does not need to be transported over long distances by pipelines and transferred by pumps, and can directly enter the subsequent slurry conditioning and flotation processes. At the same time, the inner and outer shaft drive components synchronously drive the stirring paddle, the mud pusher, and the impeller inside the flotation tank, so that slurry conditioning, desliming and flotation are achieved by a single drive, reducing the equipment footprint, reducing operating energy consumption and cost, and integrating magnetic separation, slurry conditioning and flotation functions into the same device, thereby simplifying the comprehensive treatment process of tailings recovery.

[0038] 2. This invention, by installing a backwash pipe inside the magnetic separation tank, disperses the magnetic agglomerates with reverse flushing water at the initial stage of their formation, allowing the mixed lead-zinc mineral particles to return to the slurry. Meanwhile, the strongly magnetic iron-containing particles are re-adsorbed onto the drum surface due to the continuous magnetic force, effectively reducing the loss of lead-zinc minerals carried into the iron concentrate by the magnetic agglomerates. At the same time, a demagnetizing component is installed in the feed channel between the magnetic separation mechanism and the slurry conditioning mechanism. An alternating magnetic field is formed by a coil connected to AC power to demagnetize weakly magnetic particles, effectively eliminating residual magnetic fields and preventing the agglomeration of fine particles caused by residual magnetic force. This allows subsequent flotation reagents to be fully and evenly adsorbed onto the surface of the lead-zinc minerals, improving the utilization efficiency of flotation reagents.

[0039] 3. This invention forms multiple sealing protections by setting a dynamic sealing component between the inner and outer shafts, a shaft sealing component between the outer shaft and the slurry conditioning tank, and a mechanical sealing component where the inner shaft passes through the bottom wall of the slurry conditioning tank. At the same time, each sealing component is connected to the isolation liquid supply system, which continuously supplies isolation liquid to the sealing area through an accumulator, keeping the sealing area under positive pressure. This effectively prevents the slurry from seeping into the gap between the inner and outer shafts, extends the service life of the seals and bearings, and ensures the normal operation of slurry conditioning and flotation by ensuring the stability of the seal. Attached Figure Description

[0040] Figure 1 This is a perspective view of the present invention;

[0041] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0042] Figure 3 This is a schematic diagram showing the positions of the mechanical seal assembly and the extension shaft assembly of the present invention;

[0043] Figure 4 This is a schematic diagram of the internal structure of the magnetic separation mechanism of the present invention;

[0044] Figure 5 This is a schematic diagram showing the location of the demagnetizing component of the present invention;

[0045] Figure 6 This is a schematic diagram of the isolation fluid supply system of the present invention;

[0046] Figure 7 This is a schematic diagram of the internal structure of the slurry preparation mechanism of the present invention;

[0047] Figure 8 This is a schematic diagram of the structure of the inner and outer shaft drive assembly of the present invention;

[0048] Figure 9 This is a side sectional view of the shaft sealing assembly and mechanical seal assembly of the present invention;

[0049] Figure 10 This is a schematic diagram showing the disassembled mechanical seal assembly and extension shaft assembly of the present invention;

[0050] Figure 11 For the present invention Figure 7 Enlarged diagram of point A in the diagram;

[0051] Figure 12 For the present invention Figure 9 Enlarged diagram of point A in the diagram;

[0052] Figure 13 For the present invention Figure 9 Enlarged diagram of point B in the diagram;

[0053] Figure 14 For the present invention Figure 9 Enlarged diagram of point C in the image.

[0054] The components include: 1. Frame; 2. Magnetic separation mechanism; 21. Magnetic separation tank; 22. Magnetic separation drum; 3. De-clumping assembly; 4. Slurry preparation mechanism; 41. Slurry preparation tank; 42. Feed hopper; 43. Baffle plate; 44. Water supply pipe; 45. Mud pusher; 46. Agitator; 5. Demagnetizing assembly; 51. Demagnetizing cylinder; 52. Inner cylinder; 53. Coil; 6. Inner and outer shaft drive assembly; 61. Drive motor; 62. Inner shaft; 63. Main gear; 64. Same-stage gear; 65. Transmission gear; 66. Reverse gear; 67. Linkage gear; 68. Outer shaft; 69. Fixing box; 7. Shaft sealing assembly; 71. Live... 711. Dynamic seal; 712. Slip ring; 713. Sealing ring; 72. Outer cylinder; 73. Liquid inlet; 8. Dynamic sealing assembly; 9. Mechanical seal assembly; 91. Top cover; 92. Static sealing ring; 93. Dynamic sealing ring; 94. Spring compensator; 95. Bottom cover; 96. Bushing; 97. Spline groove; 10. Extension shaft assembly; 101. Top flange sleeve; 102. Bottom flange sleeve; 103. Extension shaft; 11. Isolation fluid supply system; 111. Accumulator; 112. Make-up pump; 113. Water tank; 114. Pressure sensor; 12. Flotation mechanism. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 4 This invention provides a tailings comprehensive recovery iron, lead and zinc treatment device, including a frame 1, a magnetic separation mechanism 2 fixedly installed on the top of the frame 1, a slurry conditioning mechanism 4 fixedly installed in the middle of the frame 1, a flotation mechanism 12 provided at the bottom of the slurry conditioning mechanism 4, an inner and outer shaft drive assembly 6 installed inside the slurry conditioning mechanism 4, and an extension shaft assembly 10 installed at the bottom of the inner and outer shaft drive assembly 6.

[0057] The magnetic separation mechanism 2 includes a magnetic separation tank 21, a magnetic separation drum 22, a feed hopper located at the top of one side of the magnetic separation tank 21, an iron material discharge hopper located on the other side of the magnetic separation tank 21, and a slurry discharge pipe located at the bottom of the magnetic separation tank 21. A de-clumping component 3 is fixedly installed inside the magnetic separation tank 21. The de-clumping component 3 is a backwashing pipe with a water outlet. One end of the backwashing pipe is connected to an external water source. The water outlet of the backwashing pipe is located on the bottom side of the magnetic separation drum 22, and the water outlet direction is opposite to the rotation direction of the magnetic separation drum 22. The backwashing pipe is located above the highest liquid level of the magnetic separation tank 21.

[0058] After tailings are added to water, they form tailings slurry. First, wet magnetic separation is performed by the magnetic separation mechanism 2. Specifically, the tailings slurry is continuously fed from the top feed hopper on one side of the magnetic separation tank 21. The tailings slurry flows along the flow path, blocked by the irregularly shaped baffles inside the magnetic separation tank 21. Simultaneously, the magnetic separation drum 22 rotates driven by a motor. Because permanent magnets are fixed in position inside the magnetic separation drum 22, a magnetic adsorption area is formed in the fixed area as the drum rotates. When the magnetic separator reaches the bottom and comes into contact with the tailings slurry inside the magnetic separator 21, the magnetic separator 22 adsorbs the iron-containing particles in the tailings slurry onto its exterior. As the magnetic separator 22 continues to rotate, it carries the iron-containing particles to the iron discharge hopper on one side of the magnetic separator 21. At this time, the magnetic separator 22 leaves the permanent magnet area, and its external magnetism gradually weakens and disappears. With the flushing of the discharge water pipe set on one side of the top of the magnetic separator 21, the adsorbed iron-containing particles are flushed into the iron discharge hopper and discharged, thereby first selecting the iron-containing ore inside the tailings for recovery.

[0059] Furthermore, during the wet magnetic separation process, to prevent iron-containing particles from magnetizing and encapsulating other lead-zinc-containing small particles to form clumps, which would then be discharged directly along with the magnetic separation drum 22, resulting in the loss of lead-zinc ore, a de-clumping component 3 is installed inside the magnetic separation tank 21. The de-clumping component 3 is located on the side of the magnetic separation drum 22 away from the tailings slurry surface and in the strong magnetic zone of the magnetic separation drum 22. When the magnetic separation drum 22 adsorbs clumps, the clumps are dispersed by the reverse flushing of the backwash pipe outlet nozzle, and other mineral particles are flushed into the slurry. At the same time, iron-containing particles with higher magnetic properties will continue to be adsorbed or re-adsorbed on the outside of the magnetic separation drum 22, thereby reducing the magnetic clumping phenomenon and avoiding the loss of lead-zinc ore.

[0060] Please see the appendix Figure 5 and attached Figure 7 Appendix Figure 8 and attached Figure 11 The slurry preparation mechanism 4 includes a slurry preparation tank 41, a mud pusher 45, and a stirring paddle 46. The inner and outer shaft drive assembly 6 includes a drive motor 61, an inner shaft 62 connected to the output shaft of the drive motor 61, an outer shaft 68 rotatably sleeved outside the inner shaft 62, and a gear set disposed between the inner shaft 62 and the outer shaft 68. The flotation mechanism 12 includes a flotation tank and an impeller disposed inside the flotation tank.

[0061] The mud pusher 45 is fixedly connected to the bottom outer wall of the outer shaft 68 and is set at the liquid surface of the slurry tank 41. The stirring paddle 46 is fixedly connected to the bottom outer wall of the inner shaft 62 and is set inside the slurry tank 41. The inner shaft 62 and the outer shaft 68 rotate in opposite directions at a differential speed through a gear set. The extension shaft assembly 10 is fixedly installed at the bottom of the inner shaft 62 and extends into the flotation mechanism 12, and is fixedly installed with the impeller inside the flotation tank.

[0062] The feed hopper 42 is fixedly installed on the top side of the slurry mixing tank 41 and vertically set at the bottom of the slurry discharge pipe of the magnetic separator 2. The partition plate 43 is fixedly connected to the inside of the side of the slurry mixing tank 41 and forms a feeding channel extending to the bottom of the slurry mixing tank 41 between it and the feed hopper 42. The water pipe 44 is fixedly installed on the side of the partition plate 43, and one end of the water pipe 44 is connected to an external water source. The outlet of the water pipe 44 is correspondingly set on the top side of the slurry mixing tank 41. The demagnetizing component 5 is fixedly installed inside the feed hopper 42. The demagnetizing cylinder 51 is fixedly installed inside the feed hopper 42, and the inner cylinder 52 is fixedly installed inside the demagnetizing cylinder 51. The coil 53 is wound around the outside of the inner cylinder 52, and the two ends of the coil 53 are connected to the positive and negative poles of AC power.

[0063] The inner and outer shaft drive assembly 6 also includes a fixed box 69, which is fixedly installed on one side of the frame 1 and mounted on the top of the slurry tank 41. The gear set is rotatably installed inside the fixed box 69, and the drive motor 61 is fixedly installed on the top of the fixed box 69. The inner shaft 62 and the outer shaft 68 are both rotatably installed inside the fixed box 69 through bearings. The main gear 63 is fixedly connected to the top outer wall of the inner shaft 62, and the same level gear 64 is meshed on one side of the main gear 63. The transmission gear 65 is coaxially installed with the same level gear 64 and is located at the bottom of the same level gear 64. The reverse gear 66 is rotatably installed inside the fixed box 69 and is meshed between the transmission gear 65 and the linkage gear 67. The linkage gear 67 is fixedly connected to the top outer wall of the outer shaft 68.

[0064] Under the continuous rotation of the magnetic separator 22, iron-containing particles in the slurry are continuously separated. At the same time, the remaining tailings slurry is discharged from the slurry outlet pipe at the bottom of the magnetic separator 21 through the flow path. The discharged tailings slurry first enters the feed hopper 42. Since the feed hopper 42 is equipped with a demagnetizing component 5, when the tailings slurry passes through the demagnetizing component 5, the alternating magnetic field formed by the alternating current connected to the coil 53 will destroy the magnetic field of the weak magnetic particles inside the tailings slurry, thereby demagnetizing the weak magnetic particles or weak magnetic clusters inside the tailings slurry and preventing the magnetic clusters from affecting the subsequent mixing of slurry and drugs. After entering the feed hopper 42, the tailings slurry enters the bottom of one side of the slurry conditioning tank 41 through the feed channel formed with the partition 43. At the same time, the external water source is connected through the water supply pipe 44 to continuously add water to the slurry conditioning tank 41 to dilute the slurry inside the slurry conditioning tank 41 and achieve the required flotation slurry for subsequent flotation.

[0065] When the tailings slurry enters the mixing tank 41, the drive motor 61 drives the inner shaft 62 to rotate, and the inner shaft 62 drives the main gear 63 to rotate, causing the same-stage gear 64 to drive the transmission gear 65 and the reverse gear 66 to rotate, thereby causing the linkage gear 67 to drive the outer shaft 68 to rotate in a differential reverse direction. Since the size of the transmission gear 65 and the reverse gear 66 is smaller than that of the main gear 63, the same-stage gear 64 and the linkage gear 67, while the inner shaft 62 drives the stirring paddle 46 to rotate rapidly to mix and adjust the slurry and water inside the mixing tank 41, the outer shaft 68 drives the mud pusher 45 to rotate slowly in reverse, thereby stabilizing the liquid surface at the top of the mixing tank 41, so that the sludge particles inside the slurry float upward and are pushed by the mud pusher 45 to flow out to the overflow port side of the mixing tank 41. During the mixing process, desliming is carried out simultaneously. After desliming, chemicals are added and mixed to complete the mixing operation, preparing for the subsequent flotation of lead and zinc.

[0066] Please see the appendix Figure 3 Appendix Figure 6 Appendix Figure 9 Appendix Figure 10 and attached Figure 12 - Appendix Figure 14 A shaft sealing assembly 7 is provided on the outside of the outer shaft 68, and a dynamic sealing assembly 8 is symmetrically provided between the inner shaft 62 and the outer shaft 68. A mechanical sealing assembly 9 is provided between the inner shaft 62 and the slurry tank 41. A separation liquid supply system 11 is connected to one side of the shaft sealing assembly 7 and the mechanical sealing assembly 9 through a pipe. A movable seal 71 is provided between the inner shaft 62 and the outer cylinder 72. Liquid inlet holes 73 are equally spaced through the outer wall of the outer shaft 68 and are correspondingly provided on the inner side of the outer cylinder 72.

[0067] A sealing ring 713 is fixedly connected to the inner wall of the outer cylinder 72. A sealing ring 712 is filled inside the sealing ring 713. A slip ring 711 is fixedly connected to the outer wall of the inner shaft 62. One side of the sealing ring 713 abuts against the outer wall of the slip ring 711. Movable seals 71 are symmetrically arranged on the inner sides of both ends of the outer cylinder 72. An isolation liquid entry area is formed between the inner shaft 62, the movable seals 71, and the outer cylinder 72. The outer cylinder 72 is fixedly installed inside the slurry tank 41 by a fixing plate. The internal structure of the dynamic sealing assembly 8 is the same as that of the movable seals 71. An isolation liquid filling area is formed between the dynamic sealing assembly 8, the inner shaft 62, and the outer shaft 68.

[0068] The top cover 91 is fixedly installed on the inner bottom wall of the slurry mixing tank 41, and the static sealing ring 92 is fixedly connected to the inside of the top cover 91. The dynamic sealing ring 93 is rotatably set at the bottom of the static sealing ring 92 and is fixedly connected to the inner shaft 62. The spring compensation member 94 is abutted at the bottom of the dynamic sealing ring 93. The bottom annular part of the spring compensation member 94 is engaged with the outer wall of the bushing 96 and rotates synchronously with the bushing 96. The spline groove 97 is opened at the bottom end of the inner shaft 62, and the bushing 96 is provided with a spline matching the spline groove 97. The spline of the bushing 96 is sleeved on the outside of the inner shaft 62. The bottom cover 95 is fixedly installed at the bottom of the top cover 91 through a flange and is sleeved on the outside of the spring compensation member 94 and the bushing 96.

[0069] The top flange sleeve 101 is splined onto the bottom end of the inner shaft 62 and abuts against the bottom end of the bushing 96. The top flange sleeve 101 is flanged and connected to the bottom flange sleeve 102. The extension shaft 103 is splined and engaged at the bottom end of the bottom flange sleeve 102. The bottom end of the extension shaft 103 is fixedly installed to the impeller. The bottom end of the extension shaft 103 is rotatably installed on the inner bottom wall of the flotation tank. The inside of the accumulator 111 is divided into an isolation liquid zone and a nitrogen zone by a piston. The pressure sensor 114 is fixedly installed on the top inner side of the accumulator 111. The water tank 113 is fixedly installed on one side of the slurry tank 41. The pumping end of the replenishing pump 112 is connected to the water tank 113 through a pipe. The outlet end of the replenishing pump 112 is connected to the isolation liquid zone of the accumulator 111 through a pipe.

[0070] The isolation fluid area of ​​the accumulator 111 is fixedly connected to one side of the bottom cover 95 and one side of the outer cylinder 72 through pipes, so that the isolation fluid enters the dynamic sealing assembly 8, the inner shaft 62 and the outer shaft 68 to form an isolation fluid filling area, as well as the gap between the top cover 91, the bottom cover 95 and the bushing 96.

[0071] When the drive motor 61 drives the inner shaft 62 and the outer shaft 68 to rotate, causing the mud pusher 45 and the agitator 46 to perform desliming and stirring of the slurry respectively, the rotation of the inner shaft 62 simultaneously drives the extension shaft 103 at the bottom to rotate, thereby rotating the impeller inside the flotation mechanism 12. This draws in air and slurry, breaking up the air bubbles and allowing them to enter the slurry. With the help of the reagents, the air bubbles carry the lead and zinc particles upward to float. Then, the foam containing the lead and zinc particles is scraped out by the scraper on one side of the flotation cell for subsequent washing and cleaning treatment, thereby recovering the lead and zinc ore.

[0072] When the inner shaft 62 and the outer shaft 68 rotate, the inner and outer shafts and the shaft and the pool are sealed by the dynamic sealing assembly 8 and the mechanical sealing assembly 9. Specifically, when the inner shaft 62 and the outer shaft 68 rotate, the inner shaft 62 drives the slip ring 711 inside the dynamic sealing assembly 8 to rotate, and the outer shaft 68 drives the sealing ring 713 inside the dynamic sealing assembly 8 to rotate. When the sealing ring 712 is filled and pre-tightened, the sealing ring 713 can still perform dynamic sealing when it rotates relative to the slip ring 711, thereby ensuring the sealing of the inner and outer shafts and preventing slurry from entering between the outer shaft 68 and the inner shaft 62 from the mud pusher 45, which would affect the mutual rotation of the two.

[0073] Meanwhile, the movable seal 71 increases the dynamic seal between the inner shaft 62 and the outer cylinder 72. When the outer cylinder 72 is fixed inside the slurry tank 41, the outer shaft 68 rotates inside the outer cylinder 72. The outer cylinder 72 is connected to the accumulator 111 through a pipe, thereby allowing the isolation liquid to enter the inner cylinder 72. Then, it flows into the space between the inner shaft 62 and the outer shaft 68 through the liquid inlet 73. The isolation liquid generates constant pressure on the filling area, thereby forming an isolation and sealing effect between the inner and outer shafts. If the slurry enters between the inner and outer shafts from between the sealing ring 713 and the slip ring 711, it will be pushed outward by the internal isolation liquid, thereby ensuring the sealing between the inner and outer shafts. At the same time, pure water is used as the isolation liquid. If leakage occurs, the leaked isolation liquid can be entered into the slurry tank 41 as the slurry preparation liquid, avoiding the adverse effects of the isolation liquid leakage on the tailings slurry.

[0074] When the inner shaft 62 rotates, it simultaneously drives the bushing 96 to rotate, causing the dynamic sealing ring 93 and the spring compensation component 94 to rotate synchronously. The bottom cover 95 is fixedly installed between the slurry conditioning tank 41 and the flotation tank through the fixing frame at the top of the flotation tank. Since one side of the bottom cover 95 is connected to the accumulator 111 through a pipe, the isolation liquid enters the gap between the top cover 91, the bottom cover 95 and the bushing 96, thereby lubricating the contact surface between the dynamic sealing ring 93 and the static sealing ring 92 and increasing its sealing effect.

[0075] If the mechanical seal assembly 9 fails to seal, or the bushing 96 is worn, the top flange 101 and bottom flange 102 are disassembled, then the top cover 91 and bottom cover 95 are disassembled, and the bushing 96 is moved downward from the spline groove 97. The bushing 96 or the mechanical seal assembly 9 can then be replaced, avoiding the need to replace the entire inner shaft 62. The isolation fluid supply system 11 is also equipped with a time delay relay, which, in conjunction with the pressure sensor 114, is used to monitor the pipeline pressure in real time. When the pressure is lower than the preset threshold and continues for a set time, the replenishment pump 112 is automatically started to draw isolation fluid from the water tank 113 for replenishment. The accumulator 111 pipeline is also equipped with a safety valve, which automatically releases pressure when the system pressure exceeds the preset upper limit.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tailings comprehensive recovery iron, lead, and zinc treatment device, comprising a frame (1), characterized in that, A magnetic separation mechanism (2) is fixedly installed on the top of the frame (1), and a slurry preparation mechanism (4) is fixedly installed in the middle of the frame (1). A flotation mechanism (12) is provided at the bottom of the slurry preparation mechanism (4). An inner and outer shaft drive assembly (6) is installed inside the slurry preparation mechanism (4), and an extension shaft assembly (10) is installed at the bottom of the inner and outer shaft drive assembly (6). The slurry conditioning mechanism (4) includes a slurry conditioning tank (41), a mud pusher (45) and a stirring paddle (46). The inner and outer shaft drive assembly (6) includes a drive motor (61), an inner shaft (62) connected to the output shaft of the drive motor (61), an outer shaft (68) rotatably sleeved outside the inner shaft (62), and a gear set disposed between the inner shaft (62) and the outer shaft (68). The flotation mechanism (12) includes a flotation tank and an impeller disposed inside the flotation tank. The mud pusher (45) is fixedly connected to the bottom outer wall of the outer shaft (68) and is set at the liquid surface of the slurry tank (41). The stirring paddle (46) is fixedly connected to the bottom outer wall of the inner shaft (62) and is set inside the slurry tank (41). The inner shaft (62) and the outer shaft (68) rotate in opposite directions through a gear set. The extension shaft assembly (10) is fixedly installed at the bottom end of the inner shaft (62) and extends into the flotation mechanism (12), and is fixedly installed with the impeller inside the flotation cell.

2. The tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 1, characterized in that, The magnetic separation mechanism (2) includes a magnetic separation tank (21), a magnetic separation drum (22), a feed hopper located at the top of one side of the magnetic separation tank (21), an iron material discharge hopper located on the other side of the magnetic separation tank (21), and a slurry discharge pipe located at the bottom of the magnetic separation tank (21). A de-clumping component (3) is fixedly installed inside the magnetic separation tank (21). The de-clumping component (3) is a backwash pipe with a water outlet, and one end of the backwash pipe is connected to an external water source. The water outlet of the backwash pipe is correspondingly set on one side of the bottom of the magnetic separation drum (22), and the water outlet direction is set opposite to the rotation direction of the magnetic separation drum (22). The backwash pipe is set above the highest liquid level of the magnetic separation tank (21).

3. The tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 1, characterized in that, The slurry preparation mechanism (4) also includes a feed hopper (42), a partition (43), and a water supply pipe (44). The feed hopper (42) is fixedly installed on the top side of the slurry mixing tank (41) and vertically set at the bottom of the slurry discharge pipe of the magnetic separation mechanism (2). The partition plate (43) is fixedly connected to the inside of one side of the slurry mixing tank (41) and forms a feeding channel extending to the bottom of the slurry mixing tank (41) between it and the feed hopper (42). The water supply pipe (44) is fixedly installed on one side of the partition (43), and one end of the water supply pipe (44) is connected to an external water source. The outlet of the water supply pipe (44) is correspondingly set on the top side of the slurry tank (41). The inside of the feed hopper (42) is fixedly installed with a demagnetizing component (5).

4. The tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 3, characterized in that, The demagnetizing assembly (5) includes a demagnetizing cylinder (51), an inner cylinder (52), and a coil (53); The demagnetizing cylinder (51) is fixedly installed inside the feed hopper (42), and the inner cylinder (52) is fixedly installed inside the demagnetizing cylinder (51). The coil (53) is wound around the outside of the inner cylinder (52), and the two ends of the coil (53) are connected to the positive and negative poles of AC power.

5. The tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 1, characterized in that, The inner and outer shaft drive assembly (6) also includes a fixed box (69), which is fixedly installed on one side of the frame (1) and mounted on the top of the slurry tank (41). The gear set is rotatably installed inside the fixed box (69), and the drive motor (61) is fixedly installed on the top of the fixed box (69). The inner shaft (62) and the outer shaft (68) are rotatably installed inside the fixed box (69) through bearings. The gear set includes a main gear (63), a same-level gear (64), a transmission gear (65), a reverse gear (66), and a linkage gear (67). The main gear (63) is fixedly connected to the top outer wall of the inner shaft (62), and the same gear (64) is meshed on one side of the main gear (63). The transmission gear (65) is coaxially installed with the same gear (64), and the transmission gear (65) is located at the bottom of the same gear (64). The reverse gear (66) is rotatably installed inside the fixed box (69), and the reverse gear (66) is meshed between the transmission gear (65) and the linkage gear (67). The linkage gear (67) is fixedly connected to the top outer wall of the outer shaft (68).

6. The tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 1, characterized in that, The outer shaft (68) is provided with a shaft sealing assembly (7), and a dynamic sealing assembly (8) is symmetrically provided between the inner shaft (62) and the outer shaft (68). A mechanical sealing assembly (9) is provided between the inner shaft (62) and the slurry tank (41), and a separation liquid supply system (11) is connected to one side of the shaft sealing assembly (7) and the mechanical sealing assembly (9) through a pipe.

7. A tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 6, characterized in that, The shaft sealing assembly (7) includes a movable seal (71), an outer cylinder (72), and a liquid inlet (73); The movable seal (71) is disposed between the inner shaft (62) and the outer cylinder (72), and the liquid inlet (73) is equally spaced through the outer wall of the outer shaft (68) and correspondingly disposed on the inner side of the outer cylinder (72).

8. A tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 7, characterized in that, The movable seal (71) includes a slip ring (711), a sealing ring (712), and a sealing ring (713). The sealing ring (713) is fixedly connected to the inner wall of the outer cylinder (72), the sealing ring (712) is filled inside the sealing ring (713), the slip ring (711) is fixedly connected to the outer wall of the inner shaft (62), and one side of the sealing ring (713) abuts against the outer wall of the slip ring (711). The movable seal (71) is symmetrically arranged on the inner sides of both ends of the outer cylinder (72), and an isolation liquid entry area is formed between the inner shaft (62), the movable seal (71) and the outer cylinder (72). The outer cylinder (72) is fixedly installed inside the slurry tank (41) by a fixing plate. The internal structure of the dynamic sealing assembly (8) is the same as the internal structure of the movable seal (71). An isolation liquid filling area is formed between the dynamic sealing assembly (8), the inner shaft (62) and the outer shaft (68).

9. A tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 8, characterized in that, The mechanical seal assembly (9) includes a top cover (91), a static sealing ring (92), a dynamic sealing ring (93), a spring compensator (94), a bottom cover (95), a bushing (96), and a spline groove (97). The top cover (91) is fixedly installed on the inner bottom wall of the slurry mixing tank (41), and the static sealing ring (92) is fixedly connected to the inside of the top cover (91). The dynamic sealing ring (93) is rotatably set at the bottom of the static sealing ring (92) and fixedly connected to the inner shaft (62). The spring compensation member (94) is abutted at the bottom of the dynamic sealing ring (93). The bottom annular part of the spring compensation component (94) is engaged with the outer wall of the bushing (96) and rotates synchronously with the bushing (96). The spline groove (97) is opened at the bottom end of the inner shaft (62), and the bushing (96) is provided with a spline matching the spline groove (97). The bushing (96) is splined onto the outside of the inner shaft (62), and the bottom cover (95) is fixedly installed on the bottom of the top cover (91) by a flange and sleeved on the outside of the spring compensator (94) and the bushing (96). The extension shaft assembly (10) includes a top flange (101), a bottom flange (102), and an extension shaft (103). The top flange sleeve (101) is splinedly fitted onto the bottom end of the inner shaft (62) and abuts against the bottom end of the bushing (96). The top flange sleeve (101) is flangedly connected to the bottom flange sleeve (102), and the extension shaft (103) is splinedly engaged at the bottom end of the bottom flange sleeve (102). The bottom end of the extension shaft (103) is fixedly installed with the impeller, and the bottom end of the extension shaft (103) is rotatably installed on the inner bottom wall of the flotation cell.

10. A tailings comprehensive recovery iron, lead, and zinc treatment device according to claim 9, characterized in that, The isolation fluid supply system (11) includes an accumulator (111), a replenishment pump (112), a water tank (113), and a pressure sensor (114). The accumulator (111) is divided into an isolation liquid zone and a nitrogen zone by a piston. The pressure sensor (114) is fixedly installed on the top inner side of the accumulator (111). The water tank (113) is fixedly installed on one side of the slurry tank (41). The pumping end of the replenishing pump (112) is connected to the water tank (113) through a pipe. The outlet end of the replenishing pump (112) is connected to the isolation liquid zone of the accumulator (111) through a pipe. The isolation fluid area of ​​the accumulator (111) is fixedly connected to one side of the bottom cover (95) and one side of the outer cylinder (72) through pipes, so that the isolation fluid enters the dynamic sealing assembly (8), the inner shaft (62) and the outer shaft (68) to form an isolation fluid filling area, as well as the gap between the top cover (91), the bottom cover (95) and the bushing (96).

Images