Fine screening tailing treatment system

Abstract

The invention relates to the technical field of cold grinding machine tailing treatment, in particular to a fine screening tailing treatment system which is characterized in that a grinding roller is arranged in a cold grinding machine body, a liquid outlet is formed in the cold grinding machine body, an output pipe is arranged at the output end of a material pumping pump body, and a spiral press master is arranged on the surface of a material guiding frame; the cold mill has the beneficial effects that firstly, wood grinding tailings enter the cold mill body in a high-concentration manner after being extruded by the spiral press master, and then good pulp flows out through the liquid outlet to conveniently enter a papermaking finished product pool subsequently after the wood grinding tailings enter the cold mill body; unqualified tailings flow back to the cold grinding machine body through cooperation of a material pump body, a material conveying pipe and an output pipe, secondary grinding is conducted on the tailings through a grinding roller, or the output pipe is connected to the side face of a spiral press master, so that the tailings are subjected to circulating pulp grinding again, and the purposes of improving the pulp yield of wood chips and reducing the production cost are achieved; and the problem of low utilization rate of actual wood chip grinding wood pulp is also avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cold mill tailings processing, in particular to a fine screening tailings processing system. Background Art

[0002] Cold grinding mill is a special mechanical equipment, mainly used in the fiber refinement and dispersion process in the pulp and paper industry. This machine can work at a low temperature environment to reduce the thermal damage of the fiber during processing, thereby maintaining the good performance of the fiber.

[0003] Due to the short recycling cycle of domestic waste paper fiber raw materials, the fiber quality is difficult to meet the strength requirements of recycled cardboard papermaking, which easily leads to problems such as stiffness, folding resistance, and low thickness of the finished paper. To solve this problem, domestic recycled paper production companies have been looking for other papermaking raw materials. High-yield groundwood pulp has a high yield and long fiber, and can be used for papermaking to increase the bulk and strength of paper, and is favored by various papermaking companies.

[0004] However, since the groundwood pulp is directly fed into the disc grinder after only soaking and fermenting the log slices, the fiber passing rate of the 60-mesh screen after grinding is about 80%, and the slag discharge is as high as 20%, resulting in a low utilization rate of the actual wood chip groundwood pulp. If the pulp residue is directly sent to the paper machine, not only will the low fiber bonding force cause low bonding strength between the layers of the finished paper, but the low tensile strength between the fibers will also cause paper breaks, affecting the operating efficiency of the paper machine.

[0005] To this end, the present invention proposes a fine screening tailings processing system to solve the above-mentioned technical problems. Summary of the invention

[0006] The object of the present invention is to provide a fine screening tailings processing system to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a fine screening tailings processing system, the fine screening tailings processing system comprising: a cold mill body, a grinding roller is arranged in the cold mill body, a rotating rod is arranged at one end of the grinding roller, a supporting rod is arranged at the other end of the grinding roller, a feed opening is opened on the surface of the cold mill body, and a liquid discharge port is opened on the side of the feed opening; A material storage frame is provided with a material delivery pipe on the side of the material storage frame, one end of the material delivery pipe is connected to a material extraction pump body, an output pipe is provided at the output end of the material extraction pump body, a material guide frame is provided on the surface of the cold grinding machine body, and a spiral pulping machine is provided on the surface of the material guide frame.

[0008] Preferably, a ball is arranged in the grinding roller, and the ball can roll in the grinding roller with the help of external force. A placement groove is opened on the surface of the grinding roller, a fixing rod is arranged on the side of the placement groove, an auxiliary roller is sleeved on the surface of the fixing rod, and a protrusion is arranged on the surface of the auxiliary roller. There are multiple groups of protrusions, and the multiple groups of protrusions are regularly arranged in a circle about the center point of the end face of the auxiliary roller. The protrusion has a diamond column structure as a whole, and the placement groove has a square plate structure.

[0009] Preferably, a support frame is fixedly connected to the side of the cold grinding machine body, one end of the support frame is hinged with a fixed frame through a hinge, a drive motor is arranged on the surface of the fixed frame, the drive motor is fixedly connected to the surface of the fixed frame, the transmission end of the drive motor is fixedly connected to the end face of the rotating rod, and the drive motor can be used in cooperation with the rotating rod to drive the grinding roller to rotate.

[0010] Preferably, a protective cover is provided on the surface of the cold grinder body, which can cover the cold grinder body and the top of the storage frame. The protective cover is fixed to the surface of the cold grinder body by positioning bolts. A placement opening is provided on the surface of the protective cover, and a transparent plate is provided in the placement opening. The transparent plate has a square plate-like structure.

[0011] Preferably, the material storage frame is fixedly connected to the end face of the cold grinding machine body, a positioning plate is provided on the inner side of the material storage frame, a guide hole is opened on the surface of the positioning plate, a limiting bearing is fixedly connected to the surface of the positioning plate, a support screw is fixedly connected to the inner ring surface of the limiting bearing, and a limiting nut is sleeved on the surface of the support screw.

[0012] Preferably, one end of the support rod is sleeved with a first bearing, the outer ring surface of the first bearing is provided with a lifting plate, a threaded groove is provided at the bottom of the lifting plate, a guide rod is provided at the bottom of the lifting plate, one end of the guide rod is inserted into the guide hole, the guide rod can be moved up and down in the guide hole, and one end of the support screw can be screwed into the threaded groove.

[0013] Preferably, a bottom plate is provided on the side of the cold grinding machine body, the material extraction pump body is fixedly connected to the surface of the bottom plate, one end of the material delivery pipe is inserted into the material storage frame, the other end of the material delivery pipe is fixedly connected to the input end of the material extraction pump body, one end of the output pipe is fixedly connected to the output end of the material extraction pump body, and the other end of the output pipe can be inserted into the side of the material guide frame and can also be inserted into the screw pulping machine.

[0014] Preferably, a sealing plate is provided at one end of the feed port for sealing, a positioning slot is provided on the inner side of the feed port, the positioning slot is in the shape of a square plate, a filter frame can be inserted into the other end of the feed port, the filter frame has an overall arc-shaped frame structure, and a screening net is provided in the filter frame.

[0015] Preferably, a first fixing plate is fixedly connected to the bottom of the filter frame, a movable groove is opened on the end face of the first fixing plate, a limit rod is arranged on the side of the movable groove, a limit spring and a limit block are sleeved on the surface of the limit rod, and the limit block can be displaced along the limit rod.

[0016] Preferably, one end of the limit spring is fixedly connected to the inner side of the movable groove, and the other end of the limit spring is fixedly connected to the side of the limit block. One end of the limit block can be inserted into the positioning slot. A push plate is provided at the bottom of the limit block, and the side length of the push plate is greater than the side length of the movable groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The fine screening tailings processing system proposed in the present invention, when in use, first passes the ground wood tailings (in the form of sawdust) through a screw pulping machine to be squeezed and then enters the cold mill body with high concentration. Then, after the ground wood pulp tailings enter the cold mill body, the good pulp flows out through the discharge port for subsequent entry into the papermaking finished product pool. The unqualified tailings are returned to the cold mill body through the suction pump body in cooperation with the feed pipe and the output pipe to be reground by the grinding roller or the output pipe is connected to the side of the screw pulping machine to recycle the tailings for pulping. The purpose is to increase the pulping rate of wood chips, reduce production costs, and avoid the problem of low utilization rate of actual wood chip grinding. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after the protective cover is removed; Figure 3 for Figure 2 The enlarged structural diagram at A in the middle; Figure 4 This is a schematic diagram of the structure of the present invention after the grinding roller is removed; Figure 5 This is a schematic diagram of the structure of the present invention when the structure is tilted; Figure 6 This is a schematic diagram of the material storage frame structure of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a partial cross-sectional view of the material guide frame of the structure of the present invention; Fig. 9 It is a partial cross-sectional view of the structure of the present invention; Fig.10 for Fig. 9 The enlarged structural diagram at C in the middle; Fig.11 It is a schematic diagram of the structure of the screening net of the present invention.

[0018] In the figure: 1, cold grinding machine body; 2, grinding roller; 3, rotating rod; 4, supporting rod; 5, feeding port; 6, material storage frame; 7, feeding pipe; 8, material pump body; 9, output pipe; 10, material guide frame; 11, screw extruder; 12, ball bearing; 13, placement groove; 14, fixing rod; 15, auxiliary roller; 16, bump; 17, supporting frame; 18, hinge; 19, fixing bracket; 20, driving motor; 21, protective cover; 22, transparent plate; 23. Positioning plate; 24. Guide hole; 25. Limit bearing; 26. Support screw; 27. Limit nut; 28. First bearing; 29. ​​Lifting plate; 30. Threaded groove; 31. Guide rod; 32. Bottom plate; 33. Sealing plate; 34. Positioning slot; 35. Filter frame; 36. Screening net; 37. First fixed plate; 38. Moving slot; 39. Limit rod; 40. Limit spring; 41. Limit block; 42. Push plate; 43. Drain port. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-Figure 11 The present invention provides a technical solution: a fine screening tailings processing system, the fine screening tailings processing system comprising: a cold mill body 1, a grinding roller 2 is arranged in the cold mill body 1, a rotating rod 3 is arranged at one end of the grinding roller 2, a supporting rod 4 is arranged at the other end of the grinding roller 2, a discharge port 5 is opened on the surface of the cold mill body 1, and a drainage port 43 is opened on the side of the discharge port 5; A material storage frame 6, a material delivery pipe 7 is arranged on the side of the material storage frame 6, one end of the material delivery pipe 7 is connected to a material extraction pump body 8, an output pipe 9 is arranged at the output end of the material extraction pump body 8, a material guide frame 10 is arranged on the surface of the cold grinding machine body 1, and a screw pulping machine 11 is arranged on the surface of the material guide frame 10; First, the ground wood tailings (in the form of sawdust) are squeezed by a screw squeezer 11 and then enter the cold mill body 1 with high concentration. Then, after the ground wood pulp tailings enter the cold mill body 1, the good pulp flows out through the discharge port 43 for subsequent entry into the papermaking finished product pool. The unqualified tailings are returned to the cold mill body 1 through the suction pump body 8 in cooperation with the feed pipe 7 and the output pipe 9, and are then ground again by the grinding roller 2, or the output pipe 9 is connected to the side of the screw squeezer 11 to allow the tailings to be recycled for pulping. The purpose is to increase the pulping rate of wood chips, reduce production costs, and avoid the problem of low utilization rate of actual wood chip grinding.

[0021] Embodiment 2: On the basis of embodiment 1, in order to improve the grinding of tailings, a grinding roller 2 is provided, a ball 12 is provided in the grinding roller 2, and the ball 12 can roll in the grinding roller 2 with the help of external force. A placement groove 13 is provided on the surface of the grinding roller 2, and a fixing rod 14 is provided on the side of the placement groove 13. An auxiliary roller 15 is sleeved on the surface of the fixing rod 14. A protrusion 16 is provided on the surface of the auxiliary roller 15. There are multiple groups of protrusions 16, and the multiple groups of protrusions 16 are regularly arranged in a circle about the center point of the end face of the auxiliary roller 15. The protrusion 16 has a diamond column structure as a whole, and the placement groove 13 has a square plate structure. A support frame 17 is fixedly connected to the side of the cold grinding machine body 1, and a fixed bracket 19 is hinged to one end of the support frame 17 through a hinge 18. A driving motor 20 is provided on the surface of the fixed bracket 19, and the driving motor 20 is fixedly connected to the surface of the fixed bracket 19. The transmission end of the driving motor 20 is fixedly connected to the end face of the rotating rod 3, and the driving motor 20 can be used to cooperate with the rotating rod 3 to drive the grinding roller 2 to rotate; When in use, the grinding roller 2 can be driven to rotate by the driving motor 20, and then the ball 12 arranged in the grinding roller 2 can be used to cooperate with the auxiliary roller 15 to improve the grinding of the tailings to obtain more good liquid. The protrusion 16 arranged on the surface of the auxiliary roller 15 can further improve the grinding effect of the tailings by rotating the protrusion 16, thereby improving the utilization rate after grinding.

[0022] In order to facilitate the grinding of tailings of different sizes, a lifting plate 29 is provided, a first bearing 28 is sleeved on one end of the support rod 4, a lifting plate 29 is provided on the outer ring surface of the first bearing 28, a thread groove 30 is provided at the bottom of the lifting plate 29, a guide rod 31 is provided at the bottom of the lifting plate 29, one end of the guide rod 31 is inserted into the guide hole 24, the guide rod 31 can move up and down in the guide hole 24, one end of the support screw 26 can be screwed into the thread groove 30, the storage frame 6 is fixedly connected to the end face of the cold grinding machine body 1, and a positioning plate 23 is provided on the inner side of the storage frame 6 A guide hole 24 is provided on the surface of the positioning plate 23, a limited bearing 25 is fixedly connected to the surface of the positioning plate 23, a support screw 26 is fixedly connected to the inner ring surface of the limited bearing 25, a limited nut 27 is sleeved on the surface of the support screw 26, a protective cover 21 is provided on the surface of the cold grinding machine body 1, the protective cover 21 can cover the cold grinding machine body 1 and the top of the storage frame 6, the protective cover 21 is fixedly connected to the surface of the cold grinding machine body 1 by means of positioning bolts, a placement opening is provided on the surface of the protective cover 21, a transparent plate 22 is provided in the placement opening, and the transparent plate 22 is in a square plate-shaped structure; When in use, the support screw 26 can be rotated in conjunction with the limit bearing 25 and the limit nut 27, so that the lifting plate 29 can be moved up and down in conjunction with the thread groove 30. The displacement of the guide rod 31 in the guide hole 24 can avoid the problem of rotating the lifting plate 29 when the support screw 26 is rotated. When the lifting plate 29 is adjusted up and down, the contact distance between the grinding roller 2 and the cold grinding machine body 1 can be driven. The support frame 17 and the fixed bracket 19 are connected by the hinge 18 to avoid the conflict between the moving grinding roller 2 and the drive motor 20. The drive motor 20 can also be carried to rotate the angle. The setting of the protective cover 21 can protect the grinding roller 2 on the one hand, and on the other hand, the transparent plate 22 set on the surface of the protective cover 21 can be used to facilitate the staff to observe the grinding condition of the grinding roller 2, thereby improving the convenience of use.

[0023] Embodiment 3: Based on the embodiment 2, in order to improve the pulping rate of wood chips, a pump body 8 is provided, a bottom plate 32 is provided on the side of the cold grinding machine body 1, the pump body 8 is fixedly connected to the surface of the bottom plate 32, one end of the feed pipe 7 is inserted into the material storage frame 6, and the other end of the feed pipe 7 is fixedly connected to the input end of the pump body 8, one end of the output pipe 9 is fixedly connected to the output end of the pump body 8, and the other end of the output pipe 9 can be inserted into the side of the feed guide frame 10 and can also be inserted into the screw pulping machine 11; When in use, after the tailings are ground by the grinding roller 2, the output pipe 9 is first connected to the screw pulping machine 11, and then the tailings can be sent back into the screw pulping machine 11 through the suction pump body 8 using the feed pipe 7 in cooperation with the output pipe 9 for re-circulation and refining, thereby improving the pulping rate of wood chips and reducing production costs. In order to facilitate direct secondary refining of the tailings, one end of the output pipe 9 can be removed from the screw pulping machine 11 and connected to the material guide frame 10, so that the tailings after the first grinding can be directly sent into the material guide frame 10 for secondary grinding using the grinding roller 2.

[0024] In order to facilitate the direct delivery of the good grinding liquid, a screening net 36 is provided. A sealing plate 33 is provided at one end of the feed opening 5 for sealing. A positioning card slot 34 is provided on the inner side of the feed opening 5. The positioning card slot 34 is in a square plate shape. A filter frame 35 can be inserted into the other end of the feed opening 5. The filter frame 35 is an arc-shaped frame structure. A screening net 36 is provided in the filter frame 35. A first fixed plate 37 is fixedly connected to the bottom of the filter frame 35. A movable groove 38 is provided on the end surface of the first fixed plate 37. A limiting rod 39 is provided on the side of the movable groove 38, and a limiting spring 40 and a limiting block 41 are sleeved on the surface of the limiting rod 39. The limiting block 41 can move along the limiting rod 39. One end of the limiting spring 40 is fixedly connected to the inner side of the movable groove 38, and the other end of the limiting spring 40 is fixedly connected to the side of the limiting block 41. One end of the limiting block 41 can be inserted into the positioning card slot 34. A push plate 42 is provided at the bottom of the limiting block 41, and the side length of the push plate 42 is greater than the side length of the movable groove 38. When in use, the good liquid produced after grinding with the grinding roller 2 can flow out through the screening net 36, and the good liquid can flow into the discharge port 43 along the discharge port 5, and then be discharged from the discharge port 43. The setting of the screening net 36 can facilitate the direct flow of the good liquid and prevent the tailings from falling from the discharge port 5. The setting of the sealing plate 33 can seal one end of the discharge port 5. When the screening net 36 needs to be inspected, the sealing plate 33 is first taken out from one end of the discharge port 5, and then the push plate 42 can be pushed to make the limit block 41 move along the limit rod 39, so as to The limit block 41 can be disengaged from the positioning slot 34, and the positioning slot 34 can lose its limiting effect on the first fixed plate 37, so that the first fixed plate 37 can be taken out from the discharge port 5, and the screening net 36 can be conveniently taken out from the discharge port 5 for inspection. The setting of the limit spring 40 also facilitates the automatic reset of the limit block 41 after pulling the limit block 41. The setting of the push plate 42 makes it convenient to push the limit block 41 on the one hand, and on the other hand, the setting of the push plate 42 can be used to avoid the problem of the limit block 41 being detached from the limit rod 39.

[0025] In actual use, the ground wood tailings (in the form of sawdust) are squeezed by the screw squeezer 11 and then enter the cold mill body 1 with high concentration. Then, after the ground wood tailings enter the cold mill body 1, the good pulp flows out through the discharge port 43 to facilitate the subsequent entry into the papermaking finished product pool. The unqualified tailings are returned to the cold mill body 1 through the pump body 8 in cooperation with the feed pipe 7 and the output pipe 9 to be reground by the grinding roller 2 or the output pipe 9 is connected to the side of the screw squeezer 11 to circulate the tailings for re-grinding. The purpose is to increase the pulping rate of wood chips, reduce production costs, and avoid the problem of low utilization rate of actual wood chip groundwood pulp. This avoids the general groundwood pulp that only enters the disc mill after soaking and fermentation of log slices. The fiber passing rate of 60 mesh screen after grinding is about 80%, and the slag discharge is as high as 20%, resulting in low utilization rate of actual wood chip groundwood pulp. If the pulp residue is directly sent to the paper machine, not only will the low fiber bonding force cause low bonding strength between the layers of the finished paper, but also the low tensile strength between the fibers will cause paper breakage, affecting the operating efficiency of the paper machine.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fine screening tailings processing system, characterized by: The fine screening tailings processing system comprises: a cold grinding machine body (1), a grinding roller (2) is arranged in the cold grinding machine body (1), a rotating rod (3) is arranged at one end of the grinding roller (2), a supporting rod (4) is arranged at the other end of the grinding roller (2), a discharge port (5) is provided on the surface of the cold grinding machine body (1), and a liquid discharge port (43) is provided on the side of the discharge port (5); A material storage frame (6) is provided on the side of the material storage frame (6), one end of the material delivery pipe (7) is connected to a material extraction pump body (8), an output pipe (9) is provided at the output end of the material extraction pump body (8), a material guide frame (10) is provided on the surface of the cold grinding machine body (1), and a spiral pulping machine (11) is provided on the surface of the material guide frame (10).

2. A fine screening tailings processing system according to claim 1, characterized in that: A ball (12) is arranged in the grinding roller (2), and the ball (12) can roll in the grinding roller (2) with the help of external force. A placement groove (13) is provided on the surface of the grinding roller (2), and a fixing rod (14) is arranged on the side of the placement groove (13). An auxiliary roller (15) is sleeved on the surface of the fixing rod (14), and a protrusion (16) is arranged on the surface of the auxiliary roller (15). The protrusion (16) is arranged in a plurality of groups, and the plurality of groups of protrusions (16) are regularly arranged in a circle with respect to the center point of the end face of the auxiliary roller (15). The protrusion (16) is in a rhombus columnar structure as a whole, and the placement groove (13) is in a square plate-like structure.

3. A fine screening tailings processing system according to claim 1, characterized in that: A support frame (17) is fixedly connected to the side of the cold grinding machine body (1), and a fixed bracket (19) is hingedly connected to one end of the support frame (17) through a hinge (18). A driving motor (20) is arranged on the surface of the fixed bracket (19). The driving motor (20) is fixedly connected to the surface of the fixed bracket (19), and the transmission end of the driving motor (20) is fixedly connected to the end surface of the rotating rod (3). The driving motor (20) can be used to cooperate with the rotating rod (3) to drive the grinding roller (2) to rotate.

4. A fine screening tailings processing system according to claim 1, characterized in that: The surface of the cold grinding machine body (1) is provided with a protective cover (21), which can cover the cold grinding machine body (1) and the top of the material storage frame (6). The protective cover (21) is fixedly connected to the surface of the cold grinding machine body (1) by means of positioning bolts. The surface of the protective cover (21) is provided with a placement opening, and a transparent plate (22) is arranged in the placement opening. The transparent plate (22) is in a square plate-shaped structure.

5. A fine screening tailings processing system according to claim 1, characterized in that: The material storage frame (6) is fixedly connected to the end face of the cold grinding machine body (1); a positioning plate (23) is arranged on the inner side face of the material storage frame (6); a guide hole (24) is opened on the surface of the positioning plate (23); a limit bearing (25) is fixedly connected to the surface of the positioning plate (23); a support screw (26) is fixedly connected to the inner ring surface of the limit bearing (25); and a limit nut (27) is sleeved on the surface of the support screw (26).

6. A fine screening tailings processing system according to claim 1, characterized in that: One end of the support rod (4) is sleeved with a first bearing (28), an outer ring surface of the first bearing (28) is provided with a lifting plate (29), a bottom of the lifting plate (29) is provided with a threaded groove (30), a bottom of the lifting plate (29) is provided with a guide rod (31), one end of the guide rod (31) is inserted into the guide hole (24), the guide rod (31) can move up and down in the guide hole (24), and one end of the support screw rod (26) can be screwed into the threaded groove (30).

7. A fine screening tailings processing system according to claim 1, characterized in that: A bottom plate (32) is provided on the side of the cold grinding machine body (1), the material pump body (8) is fixedly connected to the surface of the bottom plate (32), one end of the material delivery pipe (7) is inserted into the material storage frame (6), the other end of the material delivery pipe (7) is fixedly connected to the input end of the material pump body (8), one end of the output pipe (9) is fixedly connected to the output end of the material pump body (8), and the other end of the output pipe (9) can be inserted into the side of the material guide frame (10) and can also be inserted into the screw pulping machine (11).

8. A fine screening tailings processing system according to claim 1, characterized in that: A sealing plate (33) is provided at one end of the feed opening (5) for sealing, a positioning slot (34) is provided on the inner side of the feed opening (5), the positioning slot (34) is in the shape of a square plate, a filter frame (35) can be inserted into the other end of the feed opening (5), the filter frame (35) is in the shape of an arc frame as a whole, and a screening net (36) is provided in the filter frame (35).

9. A fine screening tailings processing system according to claim 8, characterized in that: The bottom of the filter frame (35) is fixedly connected to a first fixing plate (37), an end surface of the first fixing plate (37) is provided with a moving groove (38), a side surface of the moving groove (38) is provided with a limiting rod (39), a surface of the limiting rod (39) is sleeved with a limiting spring (40) and a limiting block (41), and the limiting block (41) can move along the limiting rod (39).

10. A fine screening tailings processing system according to claim 9, characterized in that: One end of the limit spring (40) is fixedly connected to the inner side surface of the movable groove (38), and the other end of the limit spring (40) is fixedly connected to the side surface of the limit block (41). One end of the limit block (41) can be inserted into the positioning slot (34). A push plate (42) is provided at the bottom of the limit block (41), and the side length of the push plate (42) is greater than the side length of the movable groove (38).

Images