CN212664194U - A grading plant for tailing - Google Patents

Abstract

The utility model discloses a grading plant for tailings, which comprises a tank body, wherein the upper end of the tank body is provided with a first screening device, the first screening device comprises a first screening device body, the upper end of the first screening device body is provided with a feed inlet, a first screening mechanism is arranged in the first screening device body, and the bottom end of the tank body is provided with a discharge filling port; the first screening mechanism comprises a first screening plate and a driving assembly, and the first screening plate is provided with a first screening hole; first screening equipment body intercommunication has ore discharge pipe, and ore discharge pipe's lower extreme intercommunication has second screening equipment, and second screening equipment includes second screening equipment body, and this internal second screening plant that is provided with of second screening equipment, second screening plant include second screening board and actuating mechanism, and second screening hole has been seted up to second screening board, and the aperture in second screening hole is greater than the aperture in first screening hole. The secondary screening of the coarse ore can be realized, so that the overall utilization rate of the coarse ore is improved, and the mineral product requirement is met.

Description

A grading plant for tailing

Technical Field

The utility model relates to a construction field, in particular to a grading plant for tailing.

Background

China has a territorial area of 960 ten thousand square kilometers, which can be called a geodetic object. Mineral resources are non-renewable resources, and as the demand for the mineral resources is continuously increased along with social development, people develop the mineral resources in large quantities, so that the mineral resources are increasingly depleted and exhausted.

In the face of the problem of more and more shortage of resources in the day, it is very important to efficiently develop and utilize domestic mineral resources. Therefore, China needs to strengthen measures such as recleaning and the like to improve the utilization rate of tailings and improve the recovery rate of metals in ores and the yield of concentrate to the maximum extent.

Therefore, the tailing grading equipment with large-batch treatment and high metal utilization rate is very important. However, most of the existing tailings need to be screened in two stages, the tailings are divided into coarse ores and fine ores after primary screening, filling ores for filling in the fine ores are screened after secondary screening, the screened filling ores are used for filling in mines, the fine ores can be further utilized, but the coarse ores cannot be utilized again due to the fact that the coarse ores do not meet mineral product requirements, and therefore great waste is caused.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a grading plant for tailing, it can realize the secondary screening to the coarse ore to, improve the bulk utilization of coarse ore, adapt to the mineral products demand.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a classification device for tailings comprises a hollow tank body supported by a support frame, wherein an opening is formed in the upper end of the tank body, first screening equipment is arranged at the opening of the upper end of the tank body and comprises a first screening equipment body, a feed inlet is formed in the upper end of the first screening equipment body, a first screening mechanism for screening tailings is arranged in the first screening equipment body, and the lower end of the first screening equipment body is communicated with the upper end of the tank body; the bottom end of the tank body is provided with a discharging and filling port; the first screening mechanism comprises a first screening plate and a driving assembly for driving the first screening plate to vibrate, a first screening hole is formed in the first screening plate, and one side of the first screening plate is hinged to two opposite side walls and the other end of the first screening device body through a hinge shaft, and a gap is reserved between the other end of the first screening device body and the inner wall of the first screening device body; an ore outlet is formed in the inner wall of the first screening equipment body and the hinged end of the first screening equipment body on the first screening plate, an ore outlet pipe is communicated with the first screening equipment body at the ore outlet, the lower end of the ore outlet pipe is communicated with second screening equipment, the second screening equipment comprises a second screening equipment body, and the ore inlet of the second screening equipment body is communicated with the lower end of the ore outlet pipe; this internal second screening plant that is provided with of second screening equipment, second screening plant includes second screening board and the actuating mechanism of drive second screening board vibration, second screening hole has been seted up to the second screening board, the aperture in second screening hole is greater than the aperture in first screening hole.

By adopting the technical scheme, firstly, the tailings are poured into the first screening equipment body through the feeding hole, the driving assembly is started, the driving assembly drives the first screening plate to vibrate, the tailings are screened to be coarse ores and fine ores, the screened fine ores are settled in the tank body, and finally, the tailings are discharged through the discharging filling hole to be used for filling a mine; the coarse ore left on the first screening plate reaches the second screening device body through the ore discharge pipe, the driving mechanism is driven, and the driving mechanism drives the second screening plate to vibrate, so that the coarse ore is screened again, and two kinds of screened ore can meet the mineral product requirements; the secondary screening of the coarse ore can be realized, so that the overall utilization rate of the coarse ore is improved, and the mineral product requirement is met.

The utility model discloses further set up to: the driving assembly comprises a first rotating rod, a first cam and a first driving motor, wherein the first rotating rod is arranged below the first screening plate and is parallel to the first screening plate, the first cam rotates coaxially with the first rotating rod, and the first driving motor drives the first rotating rod to rotate.

Through adopting above-mentioned technical scheme, first driving motor drives first rotation pole and rotates, and first rotation pole drives first cam and rotates, and the rotation of first cam leads to first screening board to reciprocate to the realization is to the vibratory screening operation of tailing.

The utility model discloses further set up to: the driving assembly further comprises a rolling wheel arranged on the lower surface of the first screening plate, and the rolling wheel is abutted to the first cam.

Through adopting above-mentioned technical scheme, the setting of rolling wheel, rolling wheel reduce the frictional force between first cam and the first screening board in the power transmission in-process with the mode of rolling, simple structure.

The utility model discloses further set up to: the outer peripheral surface of the first cam is provided with a rolling groove, and the rolling wheel is positioned in the rolling groove.

Through adopting above-mentioned technical scheme, the setting of rolling groove makes the relative motion of rolling wheel and first cam more stable, improves its relative stability in the roll process.

The utility model discloses further set up to: the upper surface of the relative both sides of first screening board along first rotation pole length direction has set firmly the bottom suspension fagging, the relative two inner walls of first screening equipment body have set firmly the backup pad in the position department directly over the bottom suspension fagging, go up and install spacing spring between backup pad and the bottom suspension fagging.

Through adopting above-mentioned technical scheme, go up backup pad, bottom suspension fagging and spacing spring's cooperation for the rolling wheel remains throughout with the butt of first cam, reinforcing whole drive assembly's motion stability.

The utility model discloses further set up to: actuating mechanism sets firmly the second cam that two intervals of second dwang set up and sets up in two sets of subassemblies that slide of second cam top and second cam one-to-one including setting up in the second driving motor of second screening equipment body outer wall, setting up in the second dwang of second driving motor output shaft, setting firmly two the second cam, and wear to locate two the tip behind the second cam rotates and connects in second screening equipment body inner wall.

Through adopting above-mentioned technical scheme, start second driving motor, second driving motor drives the second dwang and rotates, and the second dwang drives the second cam and rotates, and the second cam drives the reciprocating motion about the subassembly that slides, and the subassembly that slides drives the reciprocal slip about the second screening board to, accomplish the vibration screening to the second screening board.

The utility model discloses further set up to: the subassembly that slides sets firmly in the slide bar of slide block upper surface and sets firmly in the guide block of second screening equipment body inner wall including being located the slide block directly over the second cam, the guiding hole has been seted up to the guide block, the tip butt behind the guiding hole is worn to locate by the slide bar in the lower surface of second screening board.

Through adopting above-mentioned technical scheme, start second driving motor, second driving motor drives the second dwang and rotates, and the second dwang drives the second cam and rotates, and the second cam drives the sliding block and removes, and the sliding block drives sliding rod reciprocating motion from top to bottom, and sliding rod drive second screening board reciprocating motion from top to bottom to accomplish to second screening board reciprocating motion operation from top to bottom.

The utility model discloses further set up to: the sliding block with be provided with compression spring between the guide block, and compression spring cover locates the pole that slides, compression spring's upper end butt in the lower surface of guide block, lower extreme butt in the upper surface of sliding block.

Through adopting above-mentioned technical scheme, compression spring's setting plays certain cushioning effect when the second screening board is toward whereabouts, strengthens the stability of second screening board reciprocating motion in-process from top to bottom.

The utility model discloses further set up to: the lower end of the tank body is communicated with a discharging square pipe at the position of the discharging filling opening, two discharging plates are hinged to two opposite sides of the discharging square pipe, and the upper surfaces of the lower ends of the two discharging plates are attached to the bottom end of the discharging square pipe; the side wall that ejection of compact side's pipe and it are adjacent in ejection of compact board hinged end is provided with the pneumatic cylinder respectively, the upper end of pneumatic cylinder and the lateral wall of ejection of compact side's pipe are articulated, the upper surface of the lower extreme of pneumatic cylinder piston rod and ejection of compact board lower extreme is articulated.

By adopting the technical scheme, the hydraulic cylinder is controlled and drives the discharge plate to move, so that the control on the ore removal of the fine ores after precipitation is realized.

The utility model discloses further set up to: the discharging filling openings are arranged in a plurality.

Through adopting above-mentioned technical scheme, the efficiency of whole mine packing is strengthened to the setting of a plurality of ejection of compact filling openings.

To sum up, the utility model discloses following beneficial effect has: firstly, pouring tailings into a first screening equipment body through a feeding hole, starting a driving assembly, driving the first screening plate to vibrate by the driving assembly, screening the tailings into coarse ores and fine ores, settling the screened fine ores in a tank body, and finally discharging the fine ores through a discharging filling port for filling a mine; the coarse ore left on the first screening plate reaches the second screening device body through the ore discharge pipe, the driving mechanism is driven, and the driving mechanism drives the second screening plate to vibrate, so that the coarse ore is screened again, and two kinds of screened ore can meet the mineral product requirements; the secondary screening of the coarse ore can be realized, so that the overall utilization rate of the coarse ore is improved, and the mineral product requirement is met.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a partial structural schematic diagram of the present invention;

fig. 4 is a schematic view of the structure of the present invention in partial section;

FIG. 5 is an enlarged view of portion B of FIG. 4;

figure 6 is a schematic view of the cross-sectional structure of the second sieving device body of the present invention;

fig. 7 is an enlarged view of a portion C in fig. 6.

In the figure, 1, a support frame; 2. a tank body; 3. a first screening device body; 31. a feed pipe; 32. an ore outlet; 33. ore discharging pipes; 331. a control valve; 34. an upper support plate; 35. a guide housing; 36. hinging a shaft; 4. a first screening mechanism; 41. a first screening plate; 411. a first screening aperture; 412. an edge; 413. a lower support plate; 4131. a limiting spring; 414. a U-shaped plate; 4141. a rotating shaft; 42. a drive assembly; 421. a first rotating lever; 422. a first cam; 4221. a rolling groove; 423. a first drive motor; 424. a rolling wheel; 5. a second screening device body; 51. a second screening plate; 511. a second screening aperture; 512. a limiting guide block; 52. a cover plate; 521. locking; 53. a limiting groove; 61. a second drive motor; 62. a second rotating lever; 63. a second cam; 64. a slipping component; 641. a sliding block; 642. a guide block; 643. a compression spring; 644. a slide bar; 71. discharging square tubes; 711. a support plate; 72. a discharge plate; 73. a hydraulic cylinder; 8. an operation chamber; 9. a collection bin; 91. a support bar; 92. a limiting plate; 93. the handle is pulled.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 3, in order to disclose the utility model, the grading device for tailings comprises a hollow tank body 2 supported by a support frame 1, an opening is arranged at the upper end of the tank body 2, an operation chamber 8 is arranged at the upper end of the tank body 2, and a first screening device is arranged in the operation chamber 8 and used for screening the tailings, so that the tailings are divided into coarse ores and fine ores; the lower end of the tank body 2 is provided with two discharging filling openings which are arranged at intervals, the tank body 2 is communicated with a discharging pipe 71 at the position of the discharging filling opening, two opposite sides of the discharging pipe 71 are hinged with two discharging plates 72 through a hinge rotating shaft, the two discharging plates 72 are U-shaped and are arranged oppositely, and the upper surfaces of the lower ends of the two discharging plates 72 are attached to the bottom end of the discharging pipe 71; two opposite supporting plates 711 are respectively welded on two side walls of the discharging square pipe 71 adjacent to the hinged end of the discharging plate 72, a hydraulic cylinder 73 is arranged between the two supporting plates 711, the hydraulic cylinder 73 and the two supporting plates 711 are hinged through a hinged supporting shaft, and the end part of a piston rod of the hydraulic cylinder 73 is hinged with the upper surface of the lower end of the discharging plate 72; by controlling the piston rods of the two hydraulic cylinders 73, the two discharging plates 72 can be relatively close to or far away from each other, thereby realizing the control of ore removal of fine ores.

Referring to fig. 3 and 4, the first screening device comprises a first screening device body 3, a feeding port is formed in the upper end of the first screening device body 3, a feeding pipe 31 is communicated with the feeding port at the upper end of the first screening device body 3, a first screening plate 41 is arranged inside the first screening device body, and first screening holes 411 are formed in the first screening plate 41 and used for screening tailings; one side of the first screening plate 41 is hinged to two opposite inner walls of the first screening device body 3 through a hinge shaft 36, and a gap for the first screening plate 41 to move up and down is reserved between the other side of the first screening device body 3 and the inner wall of the first screening device body 3; the lateral wall of first screening equipment body 3 has seted up ore outlet 32 with its position department in the 41 hinged ends of first screening board, and the lateral wall of first screening equipment body 3 has the direction shell 35 in the position department intercommunication of ore outlet 32, and the lower extreme intercommunication of direction shell 35 has ore discharge pipe 33, and ore discharge pipe 33 is provided with the control flap 331 that the control coarse ore flows.

Referring to fig. 4 and 5, a driving assembly 42 for driving the first screening plate 41 to vibrate and screen up and down is arranged at a position, which is below the first screening plate 41 and far away from the hinged end of the first screening plate 41, inside the first screening device body 3, the driving assembly 42 includes a first driving motor 423, a first rotating rod 421, a first cam 422 and a rolling wheel 424, the first driving motor 423 is installed on the outer side wall of the first screening device body 3, a rotating hole is formed in the first screening device body 3, an output shaft of the first driving motor 423 is arranged in the rotating hole in a penetrating manner, one end of the first rotating rod 421 is welded to the output shaft of the first driving motor 423, and the other end of the first rotating rod is connected to the inner wall of the first screening device body 3; the first cam 422 is provided with a fixing hole, and the first rotating rod 421 penetrates through the fixing hole and is welded with the first cam 422; two U-shaped plates 414 which are arranged oppositely are welded at the positions of the first screening plate 41 corresponding to the first cam 422, the U-shaped plates 414 are respectively provided with a connecting hole, a rotating shaft 4141 is arranged in the connecting hole, the rotating shaft 4141 penetrates through the connecting hole and the rolling wheel 424, and the rotating shaft 4141 is welded with the connecting hole and is rotatably connected with the rolling wheel 424; the outer peripheral surface of the first cam 422 is provided with a rolling groove 4221, the rolling wheel 424 is positioned right above the first cam 422 and is abutted against the first cam 422 in the rolling groove 4221, and the rotation axis of the rolling wheel 424 is parallel to the rotation axis of the first rotation rod 421.

The first cams 422 and the rolling wheels 424 are arranged in two, the two first cams 422 correspond to the two rolling wheels 424 one by one, and the two first cams 422 are arranged close to the two opposite inner side walls of the first device body 3 at intervals.

Three sides of the first screening plate 41 except the hinged end extend upwards to form a rim 412 for preventing tailings from falling off from the side; and the upper surface of the edge 412 of the opposite two sides of the first screening plate 41 along the length direction of the first rotating rod 421 is welded with two lower supporting plates 413 arranged at intervals, the inner wall of the first screening device body 3 is welded with an upper supporting plate 34 right above the lower supporting plate 413, and a limiting spring 4131 is installed between the upper supporting plate 34 and the lower supporting plate 413 and used for preventing the rolling wheel 424 from disengaging from the rolling groove 4221.

The first driving motor 423 is driven, the first driving motor 423 drives the first cam 422 to rotate, the first cam 422 drives the rolling wheel 424 to roll and simultaneously drives the first screening plate 41 to move up and down, and therefore vibrating screening of tailings is achieved.

Referring to fig. 1 and 6, the lower end of the ore drawing pipe 33 is provided with a second screening device, and the inlet of the second screening device is communicated with the outlet of the ore drawing pipe 33.

Referring to fig. 6 and 7, the second screening device includes a second screening device body 5, an opening is formed at an upper end of the second screening device body 5, and a cover plate 52 is fixedly locked to the opening of the second screening device body 5 through a lock catch 521.

A second screening plate 51 is arranged inside the second screening device body 5, the second screening plate 51 is provided with second screening holes 511, and the aperture of the second screening holes 511 is larger than that of the first screening holes 411 (refer to fig. 4); two spacing grooves 53 that the interval set up are seted up respectively to the relative both sides of second screening equipment body 5, and second screening board 51 has welded spacing guide block 512 respectively in the position punishment of spacing groove 53, and spacing guide block 512 slides and connects in spacing groove 53.

Two groups of driving mechanisms which are arranged at intervals are respectively arranged at positions below the second screening plate 51 in the second screening device body 5, and each driving mechanism comprises a second driving motor 61, a second rotating rod 62, two second cams 63 which are arranged at intervals and two groups of sliding assemblies 64 which are in one-to-one correspondence with the two second cams 63; second driving motor 61 installs in the outer wall of second screening equipment body 5, and the through-hole has been seted up to second screening equipment body 5, and the tip that the output shaft of second driving motor 61 was worn to locate behind the through-hole welds in second dwang 62, and the one end rotation that the second dwang 62 was worn to locate behind the second cam 63 that two intervals set up is connected in second screening equipment body 5 inner wall, and two second cams 63 all weld in the outer peripheral face of second dwang 62.

The sliding assembly 64 is positioned above the second cam 63, the sliding assembly 64 comprises a sliding block 641, a sliding rod 644, a compression spring 643 and a guide block 642, the sliding block 641 is positioned right above the second cam 63, and the lower surface of the sliding block 641 is abutted with the outer peripheral surface of the second cam 63; the guide block 642 is welded on the inner wall of the second screening device body 5, and a guide hole is formed in the guide block 642; the lower end of the sliding rod 644 is welded on the upper surface of the sliding block 641, the upper end is arranged in the guide hole in a penetrating way, and the end part arranged in the guide hole in a penetrating way is abutted against the lower surface of the second screening device body 5; the compression spring 643 is located between the slide block 641 and the guide block 642, the compression spring 643 is sleeved on the slide rod 644, an upper end of the compression spring 643 is abutted against a lower surface of the guide block 642, and a lower end thereof is abutted against an upper surface of the slide block 641.

The second driving motor 61 is started, the second driving motor 61 drives the second rotating rod 62 to rotate, the second rotating rod 62 drives the second cam 63 to rotate, the second cam 63 rotates and simultaneously drives the sliding block 641 to move up and down, the sliding block 641 drives the sliding rod 644 to move up and down, the sliding rod 644 drives the second screening plate 51 to slide up and down, and the coarse ore is further screened.

Referring to fig. 1 and 2, the outer wall of second screening equipment body 5 has been seted up in actuating mechanism below position department and has been slided the mouth, second screening equipment body 5 slides in the mouth department of sliding and is connected with collection storehouse 9, the outer wall of second screening equipment body 5 has the bracing piece 91 in the welding of collection storehouse 9 top department, the one end that the outer wall of second screening equipment body 5 was kept away from to bracing piece 91 is rotated and is connected with limiting plate 92, the outer wall butt of limiting plate 92 is in the outer wall of collection storehouse 9 in the mouth department of sliding, be used for preventing to collect storehouse 9 because vibration roll-off second screening equipment body 5 after actuating mechanism starts.

The outer wall of collection storehouse 9 is installed pulling handle 93, makes things convenient for the staff to operate collection storehouse 9.

The implementation principle of the embodiment is as follows: firstly, the tailings are poured into the first screening equipment body 3 through the feeding pipe 31, the first driving motor 423 drives the first rotating rod 421 to rotate, the first rotating rod 421 drives the first cam 422 to rotate, and the rotation of the first cam 422 causes the first screening plate 41 to move up and down, so that the vibrating screening operation on the tailings is realized; the tailings are screened into coarse ores and fine ores, after the screened fine ores are settled in the tank body 2, the hydraulic cylinder 73 is controlled, and the hydraulic cylinder 73 drives the discharge plate 72 to move, so that the control of ore removal of the settled fine ores is realized; the coarse ore left on the first screening plate 41 reaches the second screening device body 5 through the ore discharge pipe 33, the second driving motor 61 is started, the second driving motor 61 drives the second rotating rod 62 to rotate, the second rotating rod 62 drives the second cam 63 to rotate, the second cam 63 drives the sliding block 641 to move, the sliding block 641 drives the sliding rod 644 to reciprocate up and down, the sliding rod 644 drives the second screening plate 51 to reciprocate up and down, so that the operation of reciprocating up and down the second screening plate 51 is completed, the coarse ore is screened again, and both screened ores can meet the mineral product requirement; the secondary screening of the coarse ore can be realized, so that the overall utilization rate of the coarse ore is improved, and the mineral product requirement is met.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The grading device for the tailings comprises a tank body (2) which is supported by a support frame (1) and is hollow inside, wherein an opening is formed in the upper end of the tank body (2), first screening equipment is arranged at the opening of the upper end of the tank body (2), the first screening equipment comprises a first screening equipment body (3), a feeding hole is formed in the upper end of the first screening equipment body (3), a first screening mechanism (4) for screening the tailings is arranged in the first screening equipment body (3), and the lower end of the first screening equipment body (3) is communicated with the upper end of the tank body (2); the bottom end of the tank body (2) is provided with a discharging and filling port; the method is characterized in that: the first screening mechanism (4) comprises a first screening plate (41) and a driving assembly (42) for driving the first screening plate (41) to vibrate, a first screening hole (411) is formed in the first screening plate (41), and one side of the first screening plate (41) is hinged to two opposite side walls and the other end of the first screening equipment body (3) through a hinge shaft, and a gap is reserved between the other end of the first screening equipment body and the inner wall of the first screening equipment body (3); an ore outlet (32) is formed in the inner wall of the first screening equipment body (3) and the hinged end of the first screening plate (41) of the inner wall, an ore outlet pipe (33) is communicated with the first screening equipment body (3) at the position of the ore outlet (32), the lower end of the ore outlet pipe (33) is communicated with second screening equipment, the second screening equipment comprises a second screening equipment body (5), and the ore inlet of the second screening equipment body (5) is communicated with the lower end of the ore outlet pipe (33); be provided with second screening plant in second screening equipment body (5), second screening plant includes second screening board (51) and drive second screening board (51) drive mechanism (6) of vibration, second screening hole (511) have been seted up in second screening board (51), the aperture in second screening hole (511) is greater than the aperture in first screening hole (411).

2. A classification apparatus for tailings as claimed in claim 1, wherein: the driving assembly (42) comprises a first rotating rod (421) which is arranged below the first screening plate (41) and is parallel to the first screening plate (41), a first cam (422) which rotates coaxially with the first rotating rod (421) and a first driving motor (423) which drives the first rotating rod (421) to rotate.

3. A classification apparatus for tailings as claimed in claim 2, wherein: the driving assembly (42) further comprises a rolling wheel (424) arranged on the lower surface of the first screening plate (41), and the rolling wheel (424) is abutted to the first cam (422).

4. A classification apparatus for tailings as claimed in claim 3 wherein: the outer peripheral surface of the first cam (422) is provided with a rolling groove (4221), and the rolling wheel (424) is positioned in the rolling groove (4221).

5. A classification apparatus for tailings as claimed in claim 2, wherein: first screening board (41) have set firmly bottom suspension fagging (413) along the upper surface of first rotation pole (421) length direction's relative both sides, two relative inner walls of first screening equipment body (3) have set firmly backup pad (34) in the position department directly over bottom suspension fagging (413), install spacing spring (4131) between last backup pad (34) and bottom suspension fagging (413).

6. A classification apparatus for tailings as claimed in claim 1, wherein: actuating mechanism (6) including set up in second driving motor (61) of second screening equipment body (5) outer wall, set up in second dwang (62) of second driving motor (61) output shaft, set firmly in second cam (63) that two intervals of second dwang (62) set up and set up in two sets of subassemblies (64) that slide above second cam (63) and second cam (63) one-to-one, second dwang (62) are worn to locate two second cam (63), and wear to locate two the tip rotation behind second cam (63) is connected in second screening equipment body (5) inner wall.

7. A classification apparatus for tailings as claimed in claim 6, wherein: the sliding assembly (64) comprises a sliding block (641) located right above the second cam (63), a sliding rod (644) fixedly arranged on the upper surface of the sliding block (641) and a guide block (642) fixedly arranged on the inner wall of the second screening device body (5), a guide hole is formed in the guide block (642), and the end portion, behind the guide hole, of the sliding rod (644) is in penetrating connection with the lower surface of the second screening plate (51).

8. A classification apparatus for tailings as claimed in claim 7, wherein: a compression spring (643) is arranged between the sliding block (641) and the guide block (642), the compression spring (643) is sleeved on the sliding rod (644), the upper end of the compression spring (643) is abutted against the lower surface of the guide block (642), and the lower end of the compression spring (643) is abutted against the upper surface of the sliding block (641).

9. A classification apparatus for tailings as claimed in claim 1, wherein: the lower end of the tank body (2) is communicated with a discharging square pipe (71) at the position of a discharging filling opening, two opposite sides of the discharging square pipe (71) are hinged with two discharging plates (72), and the upper surfaces of the lower ends of the two discharging plates (72) are attached to the bottom end of the discharging square pipe (71); discharging square pipe (71) is provided with pneumatic cylinder (73) respectively rather than the adjacent both sides wall in discharging plate (72) hinged end, the upper end of pneumatic cylinder (73) is articulated with the lateral wall of discharging square pipe (71), the lower extreme of pneumatic cylinder (73) piston rod is articulated with the upper surface of discharging plate (72) lower extreme.

10. A classification apparatus for tailings as claimed in claim 1, wherein: the discharging filling openings are arranged in a plurality.

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