Efficient screening and recleaning device for pretreated tail mud

Abstract

The invention provides a pretreated tail mud efficient screening and recleaning device, and relates to the field of tail mud screening, the pretreated tail mud efficient screening and recleaning device comprises a supporting rack, and a large cyclone set is arranged on the rear side of the top end face of the supporting rack; the buffer box is arranged below the supporting rack; the slurry pump is arranged on the outer side of the buffer tank; the driving water wheel is rotationally connected to the inner side of the buffer tank; the first constant-pressure auxiliary mechanism is arranged between the driving water wheel and the buffer box; an interception filter screen is slidably arranged on the inner side of the slurry pump after feeding; the second constant-pressure auxiliary mechanism is arranged between the slurry pump and the interception filter screen; the first constant-pressure auxiliary mechanism ensures that the concentration of the tail mud sucked by the slurry pump is uniform through the reciprocating motion of the mixed auxiliary slurry, so that the flow is kept stable; and the second constant-pressure auxiliary mechanism stabilizes the output pressure of the slurry pump by intercepting the rotation and vibration of the filter screen, so that the problems that the effective overflowing area of the filter screen is rapidly reduced, the resistance of the filter screen is increased, the absorption flow of the slurry pump fluctuates, and the stability of the feeding pressure of the cyclone is influenced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of tailings screening, and in particular to a device for efficiently screening and reselecting pretreated tailings. Background Art

[0002] In order to ensure maximum resource recovery and environmental protection compliance in the operation of Jinshi Mining, a cyclone group and a slurry pump are usually used to screen the precious metals and sulfide minerals in the tailings. In the process of screening the tailings, the tailings are mostly pre-screened by a larger diameter cyclone group, and after the tailings are introduced into the buffer tank, the slurry pump introduces the tailings into a small cyclone group to achieve further screening of the tailings, thereby ensuring the comprehensive recovery rate of precious metals and sulfide minerals in the tailings.

[0003] For example, the existing application number CN202411703558.6 discloses a coarse coal slime separation and dehydration equipment and a medium coal dissociation and reselection process, which relates to the field of coal processing and mineral processing technology. The present invention combines a coarse coal slime separator with a scraper vibrating centrifugal dehydrator to form an innovative integrated device, which aims to solve the problems of low coarse coal slime separation accuracy, low dehydration efficiency and complex process flow in the existing technology. At the same time, the present invention improves the treatment of medium coal and adopts a combination of multi-step crushing, screening, tempering and flotation processes to significantly improve the separation effect of clean coal and gangue, increase the recovery rate of clean coal, and reduce the carbon content in tail coal. Through this improved process flow, efficient recovery of medium coal and clean coal is achieved, and the purity of clean coal and overall resource utilization efficiency are improved.

[0004] However, in the process of using a slurry pump to introduce the tailings box in the buffer tank into the small cyclone group, in order to avoid damage to the pump body caused by large particles of impurities, a filter is usually fixedly connected to the feed port of the pump body to intercept large particles of impurities through the filter. During the long-term operation of the slurry pump, it is very easy for the sticky ore mud and the intercepted large particles of impurities to stick to each other, causing the effective flow area of ​​the filter to shrink rapidly, resulting in increased filter resistance and fluctuations in the absorption flow of the slurry pump, which not only affects the stability of the cyclone feed pressure, but also causes cross-flow or interruption of flow at the bottom flow port of the cyclone, resulting in fine-grained gold minerals failing to effectively enter the overflow recovery channel and being discharged with the coarse particles in the bottom flow, affecting the recovery rate of gold minerals in the tailings. Summary of the Invention

[0005] In view of this, the present invention provides a high-efficiency screening and reselection device for pre-treated tailings, which utilizes the impact force of the tailings flowing from the large cyclone group to the buffer tank to drive the water wheel to rotate, and automatically drives the first constant pressure auxiliary mechanism during the process of driving the water wheel to rotate, so that the tailings inside the buffer tank are evenly mixed, avoiding the sedimentation phenomenon caused by the tailings staying in the buffer tank for a long time, and ensuring the uniformity of the slurry pump's absorption flow during the process of the tailings from the slurry pump to the small cyclone group; at the same time, the force of the impeller inside the slurry pump when rotating is utilized to automatically drive the second constant pressure auxiliary mechanism, so that the interception filter rotates and slides back and forth. When the interception filter rotates and slides back and forth, the viscous ore mud and the interception filter are affected by the centrifugal force and the shock force. The automatic separation of the filter greatly avoids the mutual adhesion of sticky ore mud and intercepted large-particle impurities, keeps the flow area of ​​the interception filter consistent, improves the uniformity of the slurry pump absorption flow and the stability of the cyclone feed pressure, and ensures that fine-grained gold minerals effectively enter the overflow recovery channel, avoids the phenomenon of fine-grained gold minerals being discharged with coarse particles in the bottom flow, and further improves the recovery rate of gold minerals in the tailings; the first constant pressure auxiliary mechanism prevents the sedimentation of tailings through the reciprocating motion of the mixing auxiliary slurry, ensures the uniform concentration of tailings sucked by the slurry pump, and thus maintains a stable flow; the second constant pressure auxiliary mechanism avoids the adhesion of sticky ore mud through the rotation and vibration of the interception filter, keeps the flow area constant, and further stabilizes the output pressure of the slurry pump.

[0006] The present invention provides a high-efficiency screening and reselection device for pre-treated tailings, which specifically includes: a support frame, a large cyclone group, a buffer box, a slurry pump, a small cyclone group, a driving water wheel, a first constant pressure auxiliary mechanism and a second constant pressure auxiliary mechanism, wherein the large cyclone group is arranged on the rear side of the top end face of the support frame; the buffer box is arranged below the support frame, and the end of the overflow recovery pipe in the large cyclone group is arranged above the buffer box; the slurry pump is arranged outside the buffer box, and the feed port of the slurry pump is connected to the discharge pipe of the buffer box; the small cyclone group is arranged above the discharge pipe of the slurry pump, and the discharge pipe of the slurry pump is connected to the feed port of the small cyclone group ; The driving water wheel is rotatably connected to the inner side of the buffer box, and the driving water wheel is located below the overflow recovery pipe of the large cyclone group; the first constant pressure auxiliary mechanism is arranged between the driving water wheel and the buffer box; the first constant pressure auxiliary mechanism includes: a mixing auxiliary slurry, and the mixing auxiliary slurry is reciprocatingly arranged at the inner end of the buffer box; an interception filter is slidingly arranged on the inner side after the slurry pump feeds; the second constant pressure auxiliary mechanism is arranged between the slurry pump and the interception filter; the second constant pressure auxiliary mechanism includes: a driving auxiliary shaft, the driving auxiliary shaft is slidingly arranged behind the interception filter, and the inner end of the driving auxiliary shaft is coaxially fixedly connected to the impeller shaft of the slurry pump.

[0007] Furthermore, the first constant pressure auxiliary mechanism also includes: a reciprocating screw, which is vertically rotatably arranged on the outside of the driving water wheel, and both ends of the reciprocating screw are rotatably connected to the buffer box; the outer end of the driving water wheel is coaxially fixedly connected to a driving bevel gear; the outer end of the reciprocating screw is coaxially fixedly connected to a driven bevel gear; the driven bevel gear and the driving bevel gear are meshed with each other, and the driving bevel gear and the driven bevel gear together constitute a bevel gear transmission mechanism.

[0008] Furthermore, the first constant pressure auxiliary mechanism also includes: a limiting guide frame, a transmission auxiliary block and a positioning support shaft. The limiting guide frame is arranged on the outside of the reciprocating screw, and the two ends of the limiting guide frame are fixedly connected to the buffer box; the transmission auxiliary block is threadedly connected to the outer end of the reciprocating screw, and the outer side of the transmission auxiliary block is slidably arranged with the limiting guide frame; the positioning support shaft is rotatably connected to the lower end of the transmission auxiliary block, the longitudinal cross-section of the positioning support shaft is a T-shaped structure, and the bottom end of the positioning support shaft is coaxially fixedly connected to the mixing auxiliary pulp.

[0009] Furthermore, the first constant pressure auxiliary mechanism also includes: a transmission gear and a transmission rack, the transmission gear is coaxially fixedly connected to the outer side of the upper end of the mixing auxiliary paddle; the transmission rack is fixedly connected to the outer side of the bottom end face of the limiting guide frame, and the transmission rack and the transmission gear are engaged with each other.

[0010] Furthermore, the second constant pressure auxiliary mechanism also includes: a sliding support shaft, an anti-detachment support block and an elastic traction member, the sliding support shaft is coaxially fixedly connected to the outer side of the rear end face of the intercepting filter, and the sliding support shaft is elastically connected to the driving auxiliary shaft; the anti-detachment support block is fixedly connected to the rear end face of the sliding support shaft, and an anti-detachment guide groove is provided at the alignment position of the driving auxiliary shaft and the anti-detachment support block; the elastic traction member is fixedly connected between the anti-detachment support block and the driving auxiliary shaft; the sliding support shaft and the anti-detachment support block are both polygonal axis structures.

[0011] Furthermore, the second constant pressure auxiliary mechanism also includes: a transmission support shaft and a transmission cam. There are two transmission support shafts, and the two transmission support shafts are symmetrically arranged on the outside of the front end of the driving auxiliary shaft; there are two transmission cams, and the two transmission cams are coaxially fixedly connected to the outer ends of the two transmission support shafts, and the outer sides of the transmission cams are pressed against the frame of the intercepting filter.

[0012] Furthermore, the second constant pressure auxiliary mechanism also includes: a driving bevel gear and a transmission bevel gear, the driving bevel gear is coaxially fixedly connected to the outer side of the front end of the driving auxiliary shaft; there are two transmission bevel gears, and the two transmission bevel gears are coaxially fixedly connected to the inner end faces of the two transmission support shafts, and the two sides of the driving bevel gear are respectively meshed with the two transmission bevel gears, and the module of the driving bevel gear is greater than the module of the transmission bevel gear.

[0013] Furthermore, the second constant pressure auxiliary mechanism also includes: a positioning bracket and a crushing impeller, the positioning bracket is fixedly connected to the front end surface of the intercepting filter; the crushing impeller is rotatably connected to the outer end of the positioning bracket.

[0014] Furthermore, the second constant pressure auxiliary mechanism also includes: a driving gear and a driving gear ring, the driving gear is coaxially fixedly connected to the inner end face of the crushing impeller; the driving gear ring is slidingly arranged on the inner side of the water inlet of the slurry pump, the driving gear and the driving gear ring are engaged with each other, and the outer side of the driving gear ring is in contact with the rear end face of the positioning bracket.

[0015] Furthermore, a plurality of limit brackets are fixedly connected to the circumferential array of the outer end of the driving gear ring; a limit guide groove is provided at the aligned position between the water inlet of the slurry pump and the limit bracket; and a sliding arrangement is provided between the limit bracket and the limit guide groove.

[0016] Beneficial effects In practical application, the present invention utilizes the impact force of tailings flowing from the large cyclone group to the buffer tank to drive the water wheel to rotate. During the process of driving the water wheel to rotate, the first constant pressure auxiliary mechanism is automatically driven to uniformly mix the tailings in the buffer tank, thereby avoiding the sedimentation phenomenon caused by the tailings staying in the buffer tank for a long time, and ensuring the uniformity of the slurry pump's absorption flow rate during the process of introducing the tailings from the slurry pump to the small cyclone group.

[0017] When the present invention is in use, the force of the impeller inside the slurry pump when it rotates is used to automatically drive the second constant pressure auxiliary mechanism, so that the intercepting filter rotates and slides back and forth. When the intercepting filter rotates and slides back and forth, the sticky ore mud and the intercepting filter are automatically separated due to the influence of centrifugal force and shock force, which greatly avoids the mutual adhesion between the sticky ore mud and the intercepted large particles of impurities, keeps the flow area of ​​the intercepting filter consistent, improves the uniformity of the slurry pump absorption flow and the stability of the cyclone feed pressure, and at the same time ensures that the fine-grained gold minerals effectively enter the overflow recovery channel, avoids the phenomenon of fine-grained gold minerals being discharged with the coarse particles in the bottom flow, and further improves the recovery rate of gold minerals in the tailings.

[0018] When the present invention is in use, the first constant pressure auxiliary mechanism prevents the sedimentation of tailings through the reciprocating motion of the mixed auxiliary slurry, ensures that the concentration of tailings sucked in by the slurry pump is uniform, thereby maintaining a stable flow rate; the second constant pressure auxiliary mechanism prevents the adhesion of sticky ore mud through the rotation and vibration of the interception filter, maintains a constant flow area, and further stabilizes the output pressure of the slurry pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached figure: Figure 1 It is a schematic diagram of the overall isometric structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation structure of the first constant pressure auxiliary mechanism and the buffer box of the present invention.

[0023] Figure 3 It is a schematic diagram of the installation structure of the first constant pressure auxiliary mechanism and the driving water wheel of the present invention.

[0024] Figure 4 It is a schematic diagram of the installation structure of the driving water wheel and the reciprocating screw rod of the present invention.

[0025] Figure 5 It is a schematic cross-sectional view of the connection between the transmission auxiliary block and the positioning support shaft of the present invention.

[0026] Figure 6 It is a schematic diagram of the installation structure of the slurry pump and intercepting filter screen of the present invention.

[0027] Figure 7 It is a schematic diagram of the connection structure between the intercepting filter and the positioning bracket of the present invention.

[0028] Figure 8 It is a schematic diagram of the installation structure of the intercepting filter and the transmission cam of the present invention.

[0029] Figure 9 It is a schematic cross-sectional view of the connection between the auxiliary drive shaft and the anti-slip support block of the present invention.

[0030] Figure 10 It is a schematic diagram of the installation structure of the transmission support shaft and the drive auxiliary shaft of the present invention.

[0031] Reference Signs List 1. Support frame; 2. Large cyclone group; 3. Buffer tank; 4. Slurry pump; 5. Small cyclone group; 6. Driving water wheel; 601. Limiting guide frame; 602. Reciprocating screw; 603. Driving bevel gear; 604. Driven bevel gear; 605. Transmission auxiliary block; 606. Positioning support shaft; 607. Mixing auxiliary slurry; 608. Transmission gear; 609. Transmission rack; 7. Intercepting filter; 8. Driving auxiliary shaft; 701. Sliding support shaft; 702. Anti-slip support block; 703. Elastic traction member; 704. Transmission support shaft; 705. Driving bevel gear; 706. Transmission bevel gear; 707. Transmission cam; 708. Positioning bracket; 709. Crushing impeller; 710. Driving gear; 711. Driving gear ring; 712. Limiting bracket. DETAILED DESCRIPTION

[0032] Example 1: Please refer to Figures 1 to 5 As shown: The present invention provides a pre-treated tailings efficient screening and reselection device, comprising a support frame 1, a large cyclone group 2, a buffer box 3, a slurry pump 4, a small cyclone group 5, a driving water wheel 6 and a first constant pressure auxiliary mechanism, wherein the large cyclone group 2 is arranged at the rear side of the top end face of the support frame 1; the buffer box 3 is arranged below the support frame 1, and the end of the overflow recovery pipe in the large cyclone group 2 is arranged above the buffer box 3; the slurry pump 4 is arranged outside the buffer box 3, and the feed port of the slurry pump 4 is connected to the discharge pipe of the buffer box 3; the small cyclone The cyclone group 5 is arranged above the discharge pipe of the slurry pump 4, and the discharge pipe of the slurry pump 4 is connected to the feed port of the small cyclone group 5; the driving water wheel 6 is rotatably connected to the inner side of the buffer box 3, and the driving water wheel 6 is located below the overflow recovery pipe of the large cyclone group 2; the first constant pressure auxiliary mechanism is arranged between the driving water wheel 6 and the buffer box 3; the first constant pressure auxiliary mechanism includes: a mixing auxiliary slurry 607, which is reciprocatingly arranged at the inner end of the buffer box 3; an interception filter 7 is slidingly arranged on the inner side of the slurry pump 4 after feeding.

[0033] Among them, the first constant pressure auxiliary mechanism also includes: a reciprocating screw 602, which is vertically rotated and arranged on the outside of the driving water wheel 6, and both ends of the reciprocating screw 602 are rotatably connected to the buffer box 3; the outer end of the driving water wheel 6 is coaxially fixedly connected to the driving bevel gear 603; the outer end of the reciprocating screw 602 is coaxially fixedly connected to the driven bevel gear 604; the driven bevel gear 604 and the driving bevel gear 603 are meshed with each other, and the driving bevel gear 603 and the driven bevel gear 604 together constitute a bevel gear transmission mechanism.

[0034] Among them, the first constant pressure auxiliary mechanism also includes: a limiting guide frame 601, a transmission auxiliary block 605 and a positioning support shaft 606. The limiting guide frame 601 is arranged on the outside of the reciprocating screw 602, and the two ends of the limiting guide frame 601 are fixedly connected to the buffer box 3; the transmission auxiliary block 605 is threadedly connected to the outer end of the reciprocating screw 602, and the outer side of the transmission auxiliary block 605 is slidably arranged with the limiting guide frame 601; the positioning support shaft 606 is rotatably connected to the lower end of the transmission auxiliary block 605, and the longitudinal cross-section of the positioning support shaft 606 is a T-shaped structure. The bottom end of the positioning support shaft 606 is coaxially fixedly connected to the mixing auxiliary paddle 607.

[0035] Among them, the first constant pressure auxiliary mechanism also includes: a transmission gear 608 and a transmission rack 609, the transmission gear 608 is coaxially fixedly connected to the outer side of the upper end of the mixing auxiliary paddle 607; the transmission rack 609 is fixedly connected to the outer side of the bottom end face of the limiting guide frame 601, and the transmission rack 609 and the transmission gear 608 are engaged with each other.

[0036] The specific usage and function of this embodiment are as follows: When the present invention is in use, in the process of the tailings being filtered by the large cyclone group 2 and flowing into the buffer tank 3, the impact force generated by the mud flow drives the driving water wheel 6 to rotate. In the process of driving the water wheel 6, the active bevel gear 603 drives the driven bevel gear 604 and the reciprocating screw 602 to rotate. In the process of the reciprocating screw 602 rotating, the transmission auxiliary block 605 drives the positioning support shaft 606 and the mixing auxiliary slurry 607 to slide back and forth inside the buffer tank 3. In the process of the mixing auxiliary slurry 607 sliding back and forth inside the buffer tank 3, the transmission rack 609 drives the transmission gear 608 and the mixing auxiliary slurry 607 to rotate, so that the mixing auxiliary slurry 607 rotates synchronously when sliding back and forth inside the buffer tank 3, thereby achieving uniform mixing of the tailings inside the buffer tank 3 and avoiding sedimentation caused by the tailings staying in the buffer tank 3 for a long time.

[0037] Example 2: like Figures 6 to 10 As shown: On the basis of Example 1, it also includes a second constant pressure auxiliary mechanism, which is arranged between the slurry pump 4 and the intercepting filter 7; the second constant pressure auxiliary mechanism includes: a driving auxiliary shaft 8, the driving auxiliary shaft 8 is slidingly arranged behind the intercepting filter 7, and the inner end of the driving auxiliary shaft 8 is coaxially fixedly connected to the impeller shaft of the slurry pump 4.

[0038] Among them, the second constant pressure auxiliary mechanism also includes: a sliding support shaft 701, an anti-slip support block 702 and an elastic traction member 703. The sliding support shaft 701 is coaxially fixedly connected to the outer side of the rear end face of the intercepting filter 7, and the sliding support shaft 701 is elastically connected to the driving auxiliary shaft 8; the anti-slip support block 702 is fixedly connected to the rear end face of the sliding support shaft 701, and an anti-slip guide groove is provided at the alignment position of the driving auxiliary shaft 8 and the anti-slip support block 702; the elastic traction member 703 is fixedly connected between the anti-slip support block 702 and the driving auxiliary shaft 8; the sliding support shaft 701 and the anti-slip support block 702 are both polygonal axis structures.

[0039] Among them, the second constant pressure auxiliary mechanism also includes: a transmission support shaft 704 and a transmission cam 707. There are two transmission support shafts 704, and the two transmission support shafts 704 are symmetrically arranged vertically and rotated on the outside of the front end of the driving auxiliary shaft 8; there are two transmission cams 707, and the two transmission cams 707 are coaxially fixedly connected to the outer ends of the two transmission support shafts 704, and the outer side of the transmission cam 707 is pressed against the frame of the intercepting filter 7.

[0040] Among them, the second constant pressure auxiliary mechanism also includes: a driving bevel gear 705 and a transmission bevel gear 706. The driving bevel gear 705 is coaxially fixedly connected to the outer side of the front end of the driving auxiliary shaft 8; there are two transmission bevel gears 706, and the two transmission bevel gears 706 are coaxially fixedly connected to the inner end faces of the two transmission support shafts 704 respectively. The two sides of the driving bevel gear 705 are respectively engaged with the two transmission bevel gears 706, and the module of the driving bevel gear 705 is greater than the module of the transmission bevel gear 706.

[0041] The second constant pressure auxiliary mechanism further includes: a positioning bracket 708 and a crushing impeller 709 . The positioning bracket 708 is fixedly connected to the front end face of the intercepting filter 7 ; the crushing impeller 709 is rotatably connected to the outer end of the positioning bracket 708 .

[0042] Among them, the second constant pressure auxiliary mechanism also includes: a driving gear 710 and a driving gear ring 711, the driving gear 710 is coaxially fixedly connected to the inner end face of the crushing impeller 709; the driving gear ring 711 is slidingly arranged on the inner side of the water inlet of the slurry pump 4, the driving gear 710 and the driving gear ring 711 are engaged with each other, and the outer side of the driving gear ring 711 is in contact with the rear end face of the positioning bracket 708.

[0043] Among them, a plurality of limit brackets 712 are fixedly connected to the outer circumferential array of the driving gear ring 711; a limit guide groove is provided at the alignment position between the water inlet of the slurry pump 4 and the limit bracket 712; and a sliding arrangement is provided between the limit bracket 712 and the limit guide groove.

[0044] The specific usage and function of this embodiment are as follows: When the present invention is in use, the tailings in the buffer box 3 are introduced into the small cyclone group 5 by the slurry pump 4, and the intercepting filter 7 intercepts the large particles of metal minerals and impurities. In the process of driving the auxiliary shaft 8 to rotate, the intercepting filter 7 is pushed to rotate, so that the sticky ore mud and the intercepting filter 7 are automatically separated. In the process of driving the auxiliary shaft 8 to rotate, the driving bevel gear 705 pushes the transmission bevel gear 706 and the transmission support shaft 704 to rotate. In the process of rotating the transmission support shaft 704, the transmission cam 707 pushes the intercepting filter 7 to slide back and forth. The sliding support shaft 701 and the elastic traction member 703 realize the guide reset when the intercepting filter 7 slides back and forth. In the process of rotating and sliding the intercepting filter 7, the centrifugal force and the shock force The effect is to automatically separate the sticky sludge from the intercepting filter 7, which greatly avoids the adhesion of the sticky sludge to the intercepting filter 7. During the rotation of the intercepting filter 7, the positioning bracket 708 pushes the crushing impeller 709 to revolve. During the revolution of the crushing impeller 709, the driving gear ring 711 pushes the driving gear 710 and the crushing impeller 709 to rotate synchronously, and the auxiliary shaft 8 drives the transmission cam 707 to rotate, pushing the intercepting filter 7 to vibrate axially. At the same time, through the engagement of the driving bevel gear 705 and the transmission bevel gear 706, the crushing impeller 709 is driven to revolve and rotate, crushing the intercepted granular impurities. After the qualified granular impurities pass through the intercepting filter 7 smoothly, they are introduced into the small cyclone group 5 by the slurry pump 4 for further screening.

[0045] In this article, there are several points to note: 1. The drawings of this embodiment only involve the structures related to this embodiment. Other structures can refer to the general design.

[0046] 2. In the absence of conflict, the features of this embodiment and the embodiments can be combined with each other to obtain new embodiments.

[0047] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A high-efficiency screening and reselection device for pre-treated tailings, comprising a support frame (1), a large cyclone group (2), a buffer tank (3), a slurry pump (4), a small cyclone group (5), a driving water wheel (6), a first constant pressure auxiliary mechanism and a second constant pressure auxiliary mechanism, characterized in that: The large cyclone group (2) is arranged at the rear side of the top end surface of the support frame (1); the buffer box (3) is arranged below the support frame (1), and the end of the overflow recovery pipe in the large cyclone group (2) is arranged above the buffer box (3); the slurry pump (4) is arranged outside the buffer box (3), and the feed port of the slurry pump (4) is connected to the discharge pipe of the buffer box (3); the small cyclone group (5) is arranged above the discharge pipe of the slurry pump (4), and the discharge pipe of the slurry pump (4) is connected to the feed port of the small cyclone group (5); the driving water wheel (6) is rotatably connected to the inside of the buffer box (3), and the driving water wheel (6) is located at the overflow recovery pipe of the large cyclone group (2). The first constant pressure auxiliary mechanism is arranged between the driving water wheel (6) and the buffer box (3); the first constant pressure auxiliary mechanism comprises: a mixing auxiliary slurry (607), the mixing auxiliary slurry (607) is arranged at the inner end of the buffer box (3) for reciprocating motion; an interception filter (7) is slidingly arranged on the inner side of the slurry pump (4) after feeding; the second constant pressure auxiliary mechanism is arranged between the slurry pump (4) and the interception filter (7); the second constant pressure auxiliary mechanism comprises: a driving auxiliary shaft (8), the driving auxiliary shaft (8) is slidingly arranged behind the interception filter (7), and the inner end of the driving auxiliary shaft (8) is coaxially fixedly connected to the impeller shaft of the slurry pump (4).

2. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: The first constant pressure auxiliary mechanism further comprises: a reciprocating screw (602), the reciprocating screw (602) being vertically rotatably arranged outside the driving water wheel (6), and the two ends of the reciprocating screw (602) being rotatably connected to the buffer box (3); a driving bevel gear (603) being coaxially fixedly connected to the outer end of the driving water wheel (6); a driven bevel gear (604) being coaxially fixedly connected to the outer end of the reciprocating screw (602); the driven bevel gear (604) being meshed with the driving bevel gear (603), and the driving bevel gear (603) and the driven bevel gear (604) together forming a bevel gear transmission mechanism.

3. The high-efficiency screening and reselection device for pre-treated tailings according to claim 2, characterized in that: The first constant pressure auxiliary mechanism further comprises: a limiting guide frame (601), a transmission auxiliary block (605) and a positioning support shaft (606); the limiting guide frame (601) is arranged on the outside of the reciprocating screw (602), and both ends of the limiting guide frame (601) are fixedly connected to the buffer box (3); the transmission auxiliary block (605) is threadedly connected to the outer end of the reciprocating screw (602), and the outer side of the transmission auxiliary block (605) is slidably arranged with the limiting guide frame (601); the positioning support shaft (606) is rotatably connected to the lower end of the transmission auxiliary block (605), the longitudinal cross-section of the positioning support shaft (606) is a T-shaped structure, and the bottom end of the positioning support shaft (606) is coaxially fixedly connected to the mixing auxiliary pulp (607).

4. The high-efficiency screening and reselection device for pre-treated tailings according to claim 3, characterized in that: The first constant pressure auxiliary mechanism further comprises: a transmission gear (608) and a transmission rack (609); the transmission gear (608) is coaxially fixedly connected to the outer side of the upper end of the mixing auxiliary paddle (607); the transmission rack (609) is fixedly connected to the outer side of the bottom end surface of the limiting guide frame (601), and the transmission rack (609) and the transmission gear (608) are meshed with each other.

5. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: The second constant pressure auxiliary mechanism further comprises: a sliding support shaft (701), an anti-dropout support block (702) and an elastic traction member (703); the sliding support shaft (701) is coaxially fixedly connected to the outer side of the rear end face of the intercepting filter (7); the sliding support shaft (701) is elastically connected to the auxiliary drive shaft (8); the anti-dropout support block (702) is fixedly connected to the rear end face of the sliding support shaft (701); an anti-dropout guide groove is provided at the alignment position between the auxiliary drive shaft (8) and the anti-dropout support block (702); the elastic traction member (703) is fixedly connected between the anti-dropout support block (702) and the auxiliary drive shaft (8); the sliding support shaft (701) and the anti-dropout support block (702) are both polygonal shaft structures.

6. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: The second constant pressure auxiliary mechanism further comprises: a transmission support shaft (704) and a transmission cam (707), wherein the transmission support shafts (704) are two, and the two transmission support shafts (704) are symmetrically arranged on the outside of the front end of the driving auxiliary shaft (8) in a vertically rotatable manner; and the transmission cams (707) are two, and the two transmission cams (707) are coaxially fixedly connected to the outer ends of the two transmission support shafts (704), and the outer sides of the transmission cams (707) are pressed against the frame of the intercepting filter (7).

7. The high-efficiency screening and reselection device for pre-treated tailings according to claim 6, characterized in that: The second constant pressure auxiliary mechanism further comprises: a driving bevel gear (705) and a transmission bevel gear (706), wherein the driving bevel gear (705) is coaxially fixedly connected to the outer side of the front end of the driving auxiliary shaft (8); there are two transmission bevel gears (706), and the two transmission bevel gears (706) are coaxially fixedly connected to the inner end faces of the two transmission support shafts (704), and the two sides of the driving bevel gear (705) are respectively meshed with the two transmission bevel gears (706), and the module of the driving bevel gear (705) is greater than the module of the transmission bevel gear (706).

8. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: The second constant pressure auxiliary mechanism further comprises: a positioning bracket (708) and a crushing impeller (709); the positioning bracket (708) is fixedly connected to the front end face of the intercepting filter (7); and the crushing impeller (709) is rotatably connected to the outer end of the positioning bracket (708).

9. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: The second constant pressure auxiliary mechanism further comprises: a driving gear (710) and a driving gear ring (711); the driving gear (710) is coaxially fixedly connected to the inner end face of the crushing impeller (709); the driving gear ring (711) is slidably arranged on the inner side of the water inlet of the slurry pump (4); the driving gear (710) and the driving gear ring (711) are meshed with each other, and the outer side of the driving gear ring (711) is in contact with the rear end face of the positioning bracket (708).

10. The high-efficiency screening and reselection device for pre-treated tailings according to claim 1, characterized in that: A plurality of limiting brackets (712) are fixedly connected to a circumferential array at the outer end of the driving gear ring (711); a limiting guide groove is provided at an aligned position between the water inlet of the slurry pump (4) and the limiting bracket (712); and a sliding arrangement is provided between the limiting bracket (712) and the limiting guide groove.

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