A coal gangue diversion crushing processing system and process

Abstract

The present application relates to a coal gangue diversion crushing processing system and process, which belongs to the field of ore processing, and includes a crushing device, an elevator, a V-type powder selector, a vertical mill and a dust removal system. The discharge ends of the crushing device and the vertical mill are respectively connected to the feed end of the elevator, the discharge end of the elevator is connected to the feed end of the V-type powder selector, the finished product discharge end of the V-type powder selector is connected to the dust removal system, the slag discharge end of the V-type powder selector is connected to the feed end of the vertical mill, and a dynamic powder selector is arranged between the V-type powder selector and the dust removal system, the feed end of the dynamic powder selector is connected to the finished product discharge end of the V-type powder selector, the slag discharge end of the dynamic powder selector is connected to the feed end of the vertical mill, and the finished product discharge end of the dynamic powder selector is connected to the dust removal system. The present application further screens powder on the basis of the V-type powder selector, thereby improving the processing accuracy of the overall system.

Description

Technical Field

[0001] The present application relates to the field of ore processing, and in particular to a coal gangue diversion and crushing processing system and process. Background Art

[0002] Coal gangue is solid waste discharged during coal mining and coal washing. It is a kind of black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. After crushing, coal gangue can be used as one of the main raw materials for geological delamination grouting.

[0003] The Chinese invention patent with announcement number CN116966991B discloses an external circulation coal gangue crushing and processing system, which includes a crushing device, an elevator, a vertical mill, a powder classifier and a dust removal system. The powder classifier is a V-type powder classifier. The materials processed by the vertical mill and the crushing device are transported to the powder classifier through the elevator for separation. The materials that meet the particle size requirements are sent to the dust removal system for processing under negative pressure, and the remaining materials enter the vertical mill for processing.

[0004] Through the setting of the isolation mechanism, the materials processed by the vertical mill and the crushing device respectively enter the powder classifier for processing relatively independently. Under the premise that the fan power at the end of the system remains stable, it is easy to cause the powder classifier to still have a lot of large particles in the finished powder materials, or cause more fine particles that meet the processing requirements to fail to be separated as finished products in the powder classifier in time. Summary of the invention

[0005] In order to improve the above problems, the present application provides a coal gangue diversion and crushing processing system and process.

[0006] The present application provides a coal gangue diversion and crushing processing system and process using the following technical solutions:

[0007] A coal gangue diversion crushing processing system comprises a crushing device, an elevator, a V-type powder classifier, a vertical mill and a dust removal system, wherein the discharge ends of the crushing device and the vertical mill are respectively connected to the feed end of the elevator, the discharge end of the elevator is connected to the feed end of the V-type powder classifier, the finished product discharge end of the V-type powder classifier is connected to the dust removal system, the slag discharge end of the V-type powder classifier is connected to the feed end of the vertical mill, a dynamic powder classifier is arranged between the V-type powder classifier and the dust removal system, the feed end of the dynamic powder classifier is connected to the finished product discharge end of the V-type powder classifier, the slag discharge end of the dynamic powder classifier is connected to the feed end of the vertical mill, and the finished product discharge end of the dynamic powder classifier is connected to the dust removal system.

[0008] By adopting the above technical solution, the dynamic powder classifier performs secondary powder selection on the material processed by the V-type powder classifier, the particles that meet the processing requirements are subsequently dust-removed, and the particles that do not meet the processing requirements are transported back to the vertical mill for re-crushing, thereby improving the processing accuracy of the overall system.

[0009] Preferably, the finished product discharge end of the dynamic powder classifier is located at the top and the slag discharge end is located at the bottom, the dynamic powder classifier comprises a cabin, a separation screen drum and a rotor, the separation screen drum and the rotor are both rotatably arranged in the cabin, the rotor is located in the separation screen drum and the two are coaxial; a diversion mechanism is provided between the V-type powder classifier and the dynamic powder classifier, the diversion mechanism comprises a fine powder conveying pipe and a coarse powder conveying pipe, one end of the fine powder conveying pipe and the coarse powder conveying pipe are connected to the V-type powder classifier, and the other end is connected to the cabin, the connection point of the fine powder conveying pipe and the cabin is higher than the connection point of the coarse powder conveying pipe and the cabin, the connection point of the fine powder conveying pipe and the cabin and the connection point of the coarse powder conveying pipe and the cabin are both located within the height range of the separation screen drum, and the diversion mechanism comprises a guide component, which allows the powder to selectively enter the fine powder conveying pipe or the coarse powder conveying pipe according to the particle size.

[0010] By adopting the above technical solution, different powders are guided separately according to the coarseness of the particles and enter the cabin of the dynamic powder classifier from different heights, thereby reducing the obstruction effect of coarse powder on fine powder in the cabin.

[0011] Preferably, the guide assembly comprises a guide fence plate, the guide fence plate is connected to the finished product discharge end of the V-type powder classifier, and the fine powder conveying pipe and the coarse powder conveying pipe are respectively located on opposite sides of the guide fence plate.

[0012] By adopting the above technical solution, the material passes through the finished product discharge end of the V-type powder classifier and then rushes towards the guide fence plate. Finer particles can directly enter the fine powder conveying pipe through the gaps on the guide fence plate, while coarser particles cannot pass through the guide fence plate and move towards the coarse powder conveying pipe under the elastic impact of the guide fence plate.

[0013] Preferably, one side of the guide fence plate is hingedly arranged on the inner wall of the V-type powder classifier's discharge port away from the dynamic powder classifier, the fine powder conveying pipe is located above the guide fence plate, and a connecting spring is connected between the guide fence plate and the V-type powder classifier.

[0014] By adopting the above technical solution, the connecting spring can buffer the impacted guide fence plate and improve the durability of the guide fence plate.

[0015] Preferably, the coarse powder conveying pipe includes a horizontal portion and a cabin entry portion along the direction of powder travel, the length direction of the horizontal portion is horizontal, the cabin entry portion is higher than the horizontal portion, a static space is arranged between the cabin entry portion and the horizontal portion, a movable plate is movably arranged in the cabin entry portion, and the movement of the movable plate relative to the cabin entry portion is used to control whether the cabin entry portion is conductive or not.

[0016] By adopting the above technical solution, the material guided by the guide fence plate enters the horizontal part and comes to the static space. The movable plate controls whether there is airflow in the coarse powder conveying pipe by changing the conduction of the cabin entrance part. When there is no airflow in the coarse powder conveying pipe, the powder can be left static in the static space.

[0017] Preferably, a falling pipe is connected between the coarse powder conveying pipe and the feeding end of the vertical mill, the upper end of the falling pipe is located at the bottom of the static space, a gate plate is provided between the coarse powder conveying pipe and the falling pipe, the movement of the gate plate relative to the coarse powder conveying pipe is used to control the opening or closing of the upper port of the falling pipe, and the diversion mechanism includes a control component for controlling the movement of the gate plate.

[0018] By adopting the above technical solution, the gate plate receives the materials in the static space. When the gate plate opens the falling pipe, the materials in the static space lose their support and fall into the falling space, and finally enter the vertical mill.

[0019] Preferably, the control component includes a control shaft, and the gate plates and control shafts are provided in plurality, the plurality of gate plates are arranged in parallel, a single gate plate is connected to a corresponding control shaft, the gate plate is rotatably connected to the coarse powder conveying pipe via the control shaft, and the control component also includes a linkage, which is used to control all control shafts to rotate synchronously.

[0020] By adopting the above technical solution, the movement of the linkage can control all the gates to rotate synchronously, thereby controlling the opening or closing of the falling pipe.

[0021] Preferably, the linkage part is a linkage push rod, which is slidably connected to the coarse powder conveying pipe, and the sliding direction is perpendicular to the length direction of the control shaft. A plurality of abutment wheels are rotatably connected to the linkage push rod, and the axis of the abutment wheel is perpendicular to the moving direction of the linkage push rod. A mounting sleeve is fixedly connected to the gate plate, and the mounting sleeve is sleeved on the control shaft. A transmission gear is coaxially fixedly connected to the end of the mounting sleeve. The plurality of abutment wheels are arranged along the moving direction of the linkage push rod, and the serrations of the transmission gear are meshed between two adjacent abutment wheels.

[0022] Preferably, a mounting rod is rotatably provided in the coarse powder conveying pipe, the axis of the mounting rod is horizontal and perpendicular to the length direction of the control shaft, one end of all the control shafts is fixedly connected to the mounting rod, a limit block is fixedly connected to the mounting rod or the coarse powder conveying pipe, the limit block abuts against the gate plate to control the rotation angle of the gate plate, the transmission gear is located at an end of the control shaft away from the mounting rod, and the linkage push rod is located below the transmission gear.

[0023] A treatment process based on the above-mentioned coal gangue diversion and crushing treatment system, wherein the hoist is provided with an isolation mechanism, and the isolation mechanism is used to allow the materials from the vertical mill and the crushing device to enter the V-type powder concentrator in batches, and the order of time is S1 coarse powder feeding, S2 fine powder feeding, S3 idle period, S1-S3 cycle;

[0024] S1 Coarse powder feeding: The material from the crushing mechanism enters the V-type powder classifier. At this time, the fine powder conveying pipe is connected, the movable plate blocks the passage into the cabin, and the gate closes the falling pipe;

[0025] S2 Fine powder feeding: The material from the vertical mill enters the V-type powder concentrator. At this time, the fine powder conveying pipe is connected, the movable plate blocks the passage into the cabin, and the gate closes the falling pipe;

[0026] S3 idle period: There is no material transmission between the elevator and the V-type powder classifier. At this time, the fine powder conveying pipe is connected, the movable plate is activated to open the passage in the cabin, and the gate is activated to open the falling channel.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Through the setting of the dynamic powder classifier, the material processed by the V-type powder classifier is subjected to secondary powder selection. The particles that meet the processing requirements are subjected to subsequent dust removal, and the particles that do not meet the processing requirements are transported back to the vertical mill for re-crushing, which improves the processing accuracy of the overall system;

[0029] 2. Through the setting of the diversion mechanism, different powders are guided separately according to the coarseness of the particles, and enter the cabin of the dynamic powder selector from different heights, reducing the obstruction of coarse powder on fine powder in the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall schematic diagram used to reflect the coal gangue diversion and crushing processing system in the embodiment of the present application.

[0031] Figure 2 It is a structural schematic diagram used to reflect the transformation from a V-type powder classifier to a dynamic powder classifier in the embodiment of the present application.

[0032] Figure 3It is a schematic cross-sectional view of the structure of the gate and the control assembly in the embodiment of the present application.

[0033] Figure 4 It is a schematic cross-sectional view of the structure used to illustrate the connection between the static space and the falling pipe in the embodiment of the present application.

[0034] Figure 5 It is a schematic cross-sectional view of the structure used to illustrate the effect of the limit block on the gate plate in the embodiment of the present application.

[0035] Explanation of the reference numerals: 1. Crushing device; 11. Elevator; 12. V-type powder classifier; 13. Vertical mill; 14. Dust removal system; 2. Dynamic powder classifier; 21. Cabin; 22. Separation screen drum; 23. Rotor; 3. Diversion mechanism; 31. Fine powder conveying pipe; 32. Guide assembly; 321. Guide fence plate; 322. Connecting spring; 33. Coarse powder conveying pipe; 331. Horizontal part; 332. Cabin entry part; 333. Static space; 34. Movable plate; 4. Falling pipe; 41. Gate; 42. Mounting sleeve; 421. Transmission gear; 43. Mounting frame rod; 431. Limit block; 44. Control assembly; 441. Linkage; 442. Abutment wheel; 443. Control shaft. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The present application embodiment discloses a coal gangue diversion and crushing processing system, such as Figure 1 and 2 As shown, it includes a crushing device 1, an elevator 11, a V-type powder classifier 12, a vertical mill 13, a dynamic powder classifier 2 and a dust removal system 14. The discharge ends of the crushing device 1 and the vertical mill 13 are respectively connected to the feed ends of the elevator 11, the discharge end of the elevator 11 is connected to the feed end of the classifier, the finished product discharge end of the V-type powder classifier 12 is connected to the dust removal system 14, and the slag discharge end of the V-type powder classifier 12 is connected to the feed end of the vertical mill 13; the feed end of the dynamic powder classifier 2 is connected to the finished product discharge end of the V-type powder classifier 12, the finished product discharge end of the dynamic powder classifier 2 is connected to the dust removal system 14, and the slag discharge end of the dynamic powder classifier 2 is connected to the feed end of the vertical mill 13. The elevator 11 transports the materials from the vertical mill 13 and the crushing mechanism to the V-type powder classifier 12, which performs preliminary screening on the materials. The dynamic powder classifier 2 screens the materials after preliminary screening again. The qualified finished materials after two screenings will enter the dust removal system 14 for processing, and the materials that fail the two screenings will enter the vertical mill 13 again for crushing. The negative pressure fan included in the dust removal system 14 provides driving force for the materials in the V-type powder classifier 12 and the dynamic powder classifier 2.

[0038] like Figure 2 As shown, the dynamic powder classifier 2 includes a cabin 21, a separation screen drum 22 and a rotor 23. The finished product discharge end of the dynamic powder classifier 2 is located at the top of the cabin 21, and the slag discharge end is located at the bottom of the cabin 21. The separation screen drum 22 and the rotor 23 are both rotatably arranged in the cabin 21, and the rotor 23 is located in the separation screen drum 22 and the two are coaxial. The feed end of the dynamic powder classifier 2 is located in the middle of the cabin 21. After the material passes through the separation screen drum 22, it contacts the continuously rotating rotor 23 and is subjected to centrifugal force. Under the influence of its own gravity and airflow, particles with larger particle sizes will fall to the slag discharge end and then move to the vertical mill 13, and particles with smaller particle sizes will leave the dynamic powder classifier 2 through the finished product discharge end with the airflow.

[0039] like Figure 2 As shown, a flow dividing mechanism 3 is provided between the V-type powder classifier 12 and the dynamic powder classifier 2, and the flow dividing mechanism 3 includes a guide assembly 32, and the flow dividing mechanism 3 includes a fine powder conveying pipe 31 and a coarse powder conveying pipe 33, one end of the fine powder conveying pipe 31 and the coarse powder conveying pipe 33 are connected to the V-type powder classifier 12, and the other end is connected to the cabin 21 of the dynamic powder classifier 2, and the guide assembly 32 allows the powder at the finished product discharge end of the V-type powder classifier 12 to selectively enter the fine powder conveying pipe 31 or the coarse powder conveying pipe 33 according to the particle size. The connection point between the fine powder conveying pipe 31 and the cabin 21 is higher than the connection point between the coarse powder conveying pipe 33 and the cabin 21, and the connection point between the fine powder conveying pipe 31 and the cabin 21 and the connection point between the coarse powder conveying pipe 33 and the cabin 21 are both located within the height range of the separation screen drum 22, that is, the position where the finer particles enter the interior of the cabin 21 is higher than the position where the coarser particles enter the interior of the cabin 21.

[0040] like Figure 2 and 3As shown, the length direction of the fine powder conveying pipe 31 is inclined upward, and the coarse powder conveying pipe 33 is lower than the fine powder conveying pipe 31 as a whole. In the direction of powder movement, the coarse powder conveying pipe 33 includes a horizontal portion 331 and a cabin portion 332. The length direction of the horizontal portion 331 is horizontal, and the length direction of the cabin portion 332 is also inclined upward and higher than the horizontal portion 331. The guide assembly 32 includes a guide fence plate 321, and the guide fence plate 321 is connected to the finished product discharge end of the V-type powder classifier 12. The horizontal portions 331 of the fine powder conveying pipe 31 and the coarse powder conveying pipe 33 are respectively located on opposite sides of the guide fence plate 321, and the fine powder conveying pipe 31 is located above the guide fence plate 321, and the length directions of the fine powder conveying pipe 31 and the horizontal portion 331 are both inclined relative to the plate surface of the guide fence plate 321. One side of the guide fence plate 321 is hingedly arranged on the inner wall of the V-type powder classifier 12 on the side of the discharge port away from the dynamic powder classifier 2, and a connecting spring 322 is connected between the guide fence plate 321 and the V-type powder classifier 12. After passing through the finished product discharge end of the V-type powder classifier 12, the material rushes toward the guide fence plate 321, and the finer particles can directly enter the fine powder conveying pipe 31 through the gap on the guide fence plate 321, and the coarser particles cannot pass through the guide fence plate 321, and move to the horizontal part 331 under the elastic impact of the guide fence plate 321. A static space 333 is provided between the entry portion 332 and the horizontal portion 331. The materials entering the horizontal portion 331 after being ejected by the guide fence plate 321 will slide to the static space 333. The entry portion 332 is located above the static space 333. A movable plate 34 is movably provided in the entry portion 332. The movement of the movable plate 34 relative to the entry portion 332 is used to control whether the entry portion 332 is conductive or not. When the movable plate 34 blocks the passage in the entry portion 332, there is no airflow in the coarse powder conveying pipe 33. In this embodiment, the movable plate 34 is slidably connected relative to the coarse powder conveying pipe 33, and a cylinder for pushing and pulling the movable plate 34 is provided outside the entry portion 332.

[0041] like Figure 2 , 3 As shown in FIG. 4 , a falling pipe 4 is connected between the coarse powder conveying pipe 33 and the feeding end of the vertical mill 13, and the upper end of the falling pipe 4 is located at the bottom of the static space 333 and communicates with the internal space thereof. A gate 41 is provided between the coarse powder conveying pipe 33 and the falling pipe 4, and the movement of the gate 41 relative to the coarse powder conveying pipe 33 is used to control the opening or closing of the upper end of the falling pipe 4, and the diversion mechanism 3 includes a control component 44 for controlling the movement of the gate 41. The gate 41 receives the material in the static space 333. When the gate 41 opens the falling pipe 4, the material in the static space 333 loses support and falls into the falling space, and finally enters the vertical mill 13.

[0042] like Figure 3 , 4As shown in Figure 5, the control assembly 44 includes a control shaft 443, a linkage 441 and a mounting rod 43. Multiple gate plates 41 and control shafts 443 are provided and correspond to each other. Multiple gate plates 41 are arranged in parallel, and each control shaft 443 is also arranged in parallel. The gate plates 41 are fixedly connected with a mounting sleeve 42, and the mounting sleeve 42 is sleeved on the control shaft 443. The mounting rod 43 is rotatably connected in the coarse powder conveying pipe 33, and the axis of the mounting rod 43 is in the horizontal direction and perpendicular to the length direction of the horizontal part 331; one end of all control shafts 443 is fixedly connected to the mounting rod 43, and when the mounting rod 43 rotates, one end of each control shaft 443 will swing along the height direction. The linkage member 441 is used to control the synchronous rotation of all control shafts 443; in this embodiment, the linkage member 441 is a linkage push rod, which is slidably connected to the coarse powder conveying pipe 33, and the sliding direction is perpendicular to the length direction of the control shaft 443. The linkage push rod is rotatably connected to a plurality of abutment wheels 442, which are arranged along the moving direction of the linkage push rod, and the axis of the abutment wheel 442 is perpendicular to the moving direction of the linkage push rod; the end of the mounting sleeve 42 away from the mounting frame rod 43 is coaxially fixedly connected to a transmission gear 421, and the serrations of the transmission gear 421 are meshed between two adjacent abutment wheels 442, that is, when the linkage push rod moves, the transmission gear 421 rotates under the action of torque, thereby realizing the rotation control of each gate plate 41. A cylinder for pushing and pulling the linkage push rod is arranged outside the coarse powder conveying pipe 33.

[0043] like Figure 3 , 4As shown in Figure 5, a plurality of limit blocks 431 are fixedly connected to the mounting rod 43 and the coarse powder conveying pipe 33. The limit blocks 431 abut against the gate plate 41 to control the rotation angle of the gate plate 41. Every two limit blocks 431 correspond to one gate plate 41. When the gate plate 41 rotates to abut against the limit blocks 431 on the mounting rod 43, the plate surface of the gate plate 41 is horizontal and all the gate plates 41 close the upper port of the falling pipe 4. When the gate plate 41 rotates to abut against the limit blocks 431 on the coarse powder conveying pipe 33, the plate surface of the gate plate 41 forms an angle of 60° with the horizontal plane. At this time, the upper port of the falling pipe 4 is opened, and the material in the static space 333 can fall through the gap between the gate plates 41. The linkage push rod is located below the transmission gear 421. When the linkage push rod moves to the gate plate 41 and the limit block 431, the installation sleeve 42 and the transmission gear 421 cannot continue to rotate. At this time, the linkage push rod continues to move. Since the thrust direction of the abutment wheel 442 on the serrations of the transmission gear 421 is not horizontal, but tilted upward, the linkage push rod can apply thrust to the transmission gear 421 through the abutment wheel 442 to make it deflect upward until the serrations of the transmission gear 421 relatively cross an abutment wheel 442 and then drop and reset. This process causes all control rods and all gate plates 41 to vibrate with a small amplitude. When the gate plate 41 carries materials, the vibration of the gate plate 41 can have a certain effect of homogenizing the materials thereon. When the gate plate 41 is in the state of opening the falling pipe 4, the vibration of the gate plate 41 can shake off the particles adsorbed thereon.

[0044] The embodiment of the present application also discloses a processing process based on the above-mentioned coal gangue diversion and crushing processing system: an isolation mechanism is provided on the elevator 11, and the isolation mechanism is used to allow the materials from the vertical mill 13 and the crushing device 1 to enter the V-type powder selector 12 in batches. The specific operation mechanism of the isolation mechanism can refer to the invention patent with announcement number CN116966991B; in chronological order, the working cycles of the isolation mechanism and the diversion mechanism 3 are S1 coarse powder feeding, S2 fine powder feeding, S3 idle period, S1-S3 cycle, and during the overall working cycle, the fan of the dust removal system 14 continues to work.

[0045] S1 Coarse powder feeding: The elevator 11 allows the material from the crushing mechanism to enter the V-type powder classifier 12. At this time, the fine powder conveying pipe 31 is connected, the movable plate 34 blocks the passage in the cabin 332, and the gate 41 closes the falling pipe 4. There is a negative pressure airflow in the fine powder conveying pipe 31. A small part of the finer particles in the powder pass through the guide fence plate 321 and enter the fine powder conveying pipe 31, and most of the coarser particles are guided to the static space 333;

[0046] S2 Fine powder feeding: the material from the vertical mill 13 enters the V-type powder classifier 12. At this time, the fine powder conveying pipe 31 is turned on, the movable plate 34 blocks the passage in the cabin 332, and the gate plate 41 closes the falling pipe 4. Most of the finer particles in the powder directly pass through the guide fence plate 321, and a small number of coarser particles are guided to the static space 333. At the same time, the cylinder forcibly pulls the linkage push rod to vibrate the gate plate 41, so that the material on the gate plate 41 is more evenly distributed;

[0047] S3 idle period: there is no material transmission between the elevator 11 and the V-type powder classifier 12. At this time, the fine powder conveying pipe 31 is turned on, the movable plate 34 is moved to make the passage in the cabin 332 turned on, the gate plate 41 is moved to open the falling channel, and a negative pressure airflow is formed in the coarse powder conveying pipe 33. The material in the static space 333 is affected by the airflow, and the finer particles are sucked into the cabin pipe and enter the cabin body 21. The coarser particles are greatly affected by gravity and fall down, and enter the vertical mill 13 through the falling pipe 4. When the material in the static space 333 is emptied, the control component 44 controls the gate plate 41 to flip to close the falling pipe 4, waiting for the next cycle of coarse powder feeding.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coal gangue splitting and crushing processing system, comprising a crushing device (1), an elevator (11), a V-type powder classifier (12), a vertical mill (13) and a dust removal system (14), wherein the discharge ends of the crushing device (1) and the vertical mill (13) are respectively connected to the feed end of the elevator (11), the discharge end of the elevator (11) is connected to the feed end of the V-type powder classifier (12), the finished product discharge end of the V-type powder classifier (12) is connected to the dust removal system (14), and the slag discharge end of the V-type powder classifier (12) is connected to the feed end of the vertical mill (13), characterized in that: A dynamic powder selector (2) is arranged between the V-shaped powder selector (12) and the dust removal system (14); the feed end of the dynamic powder selector (2) is connected to the finished product discharge end of the V-shaped powder selector (12); the slag discharge end of the dynamic powder selector (2) is connected to the feed end of the vertical mill (13); and the finished product discharge end of the dynamic powder selector (2) is connected to the dust removal system (14); The finished product discharge end of the dynamic powder classifier (2) is located at the top, and the slag discharge end is located at the bottom. The dynamic powder classifier (2) comprises a cabin (21), a separation screen drum (22) and a rotor (23). The separation screen drum (22) and the rotor (23) are both rotatably arranged in the cabin (21), and the rotor (23) is located in the separation screen drum (22) and the two are coaxial. A flow dividing mechanism (3) is provided between the V-shaped powder classifier (12) and the dynamic powder classifier (2), the flow dividing mechanism (3) comprising a fine powder conveying pipe (31) and a coarse powder conveying pipe (33), one end of the fine powder conveying pipe (31) and the coarse powder conveying pipe (33) being connected to the V-shaped powder classifier (12), and the other end of the fine powder conveying pipe (31) and the coarse powder conveying pipe (33) being connected to the cabin (21), the connection point between the fine powder conveying pipe (31) and the cabin (21) being higher than the connection point between the coarse powder conveying pipe (33) and the cabin (21), the connection point between the fine powder conveying pipe (31) and the cabin (21) and the connection point between the coarse powder conveying pipe (33) and the cabin (21) being both located within the height range of the separation screen drum (22), the flow dividing mechanism (3) comprising a guide assembly (32), the guide assembly (32) enabling powder to selectively enter the fine powder conveying pipe (31) or the coarse powder conveying pipe (33) according to particle size; The guide assembly (32) comprises a guide fence plate (321), the guide fence plate (321) is connected to the finished product discharge end of the V-shaped powder classifier (12), and the fine powder conveying pipe (31) and the coarse powder conveying pipe (33) are respectively located on opposite sides of the guide fence plate (321); In the direction of powder material movement, the coarse powder conveying pipe (33) comprises a horizontal portion (331) and a cabin entry portion (332); the length direction of the horizontal portion (331) is horizontal; the cabin entry portion (332) is higher than the horizontal portion (331); a static space (333) is provided between the cabin entry portion (332) and the horizontal portion (331); a movable plate (34) is movably provided in the cabin entry portion (332); the movement of the movable plate (34) relative to the cabin entry portion (332) is used to control whether the cabin entry portion (332) is conductive or not; A falling pipe (4) is connected between the coarse powder conveying pipe (33) and the feeding end of the vertical mill (13), the upper end of the falling pipe (4) is located at the bottom of the static space (333), a gate plate (41) is provided between the coarse powder conveying pipe (33) and the falling pipe (4), the movement of the gate plate (41) relative to the coarse powder conveying pipe (33) is used to control the opening or closing of the upper port of the falling pipe (4), and the diversion mechanism (3) includes a control component (44) for controlling the movement of the gate plate (41); The control assembly (44) comprises a control shaft (443), a plurality of gate plates (41) and a plurality of control shafts (443) are provided, the plurality of gate plates (41) are arranged in parallel, a single gate plate (41) is correspondingly connected to a control shaft (443), the gate plate (41) is rotatably connected to the coarse powder conveying pipe (33) via the control shaft (443), and the control assembly (44) further comprises a linkage member (441), and the linkage member (441) is used to control all control shafts (443) to rotate synchronously; The linkage member (441) is a linkage push rod, which is slidably connected to the coarse powder conveying pipe (33), and the sliding direction is perpendicular to the length direction of the control shaft (443). The linkage push rod is rotatably connected to a plurality of abutment wheels (442), and the axis of the abutment wheels (442) is perpendicular to the moving direction of the linkage push rod. The gate plate (41) is fixedly connected to a mounting sleeve (42), and the mounting sleeve (42) is sleeved on the control shaft (443). The end of the mounting sleeve (42) is coaxially fixedly connected to a transmission gear (421). The plurality of abutment wheels (442) are arranged along the moving direction of the linkage push rod, and the serrations of the transmission gear (421) are meshed between two adjacent abutment wheels (442).

2. A coal gangue diversion and crushing processing system according to claim 1, characterized in that: One side of the guide fence plate (321) is hingedly arranged on the inner wall of the discharge port of the V-type powder classifier (12) away from the dynamic powder classifier (2), the fine powder conveying pipe (31) is located above the guide fence plate (321), and a connecting spring (322) is connected between the guide fence plate (321) and the V-type powder classifier (12).

3. The coal gangue diversion and crushing processing system according to claim 1, characterized in that: A mounting rod (43) is rotatably arranged in the coarse powder conveying pipe (33), the axis of the mounting rod (43) is horizontal and perpendicular to the length direction of the control shaft (443), one end of each of the control shafts (443) is fixedly connected to the mounting rod (43), a limit block (431) is fixedly connected to the mounting rod (43) or the coarse powder conveying pipe (33), the limit block (431) abuts against the gate plate (41) to control the rotation angle of the gate plate (41), the transmission gear (421) is located at one end of the control shaft (443) away from the mounting rod (43), and the linkage push rod is located below the transmission gear (421).

4. A processing process based on the coal gangue diversion and crushing processing system according to any one of claims 1 to 3, characterized in that: The elevator (11) is provided with an isolation mechanism, which is used to allow the materials from the vertical mill (13) and the crushing device (1) to enter the V-type powder classifier (12) in batches, in the order of S1 coarse powder feeding, S2 fine powder feeding, S3 idle period, S1-S3 cycle; S1 Coarse powder feeding: the material from the crushing mechanism enters the V-type powder classifier (12), at which time the fine powder conveying pipe (31) is connected, the movable plate (34) blocks the passage in the cabin (332), and the gate (41) closes the falling pipe (4); S2 Fine powder feeding: the material from the vertical mill (13) enters the V-type powder concentrator (12), at which time the fine powder conveying pipe (31) is connected, the movable plate (34) blocks the passage in the cabin (332), and the gate (41) closes the falling pipe (4); S3 idle period: no material is transmitted between the elevator (11) and the V-type powder classifier (12). At this time, the fine powder conveying pipe (31) is connected, the movable plate (34) is moved to make the passage in the cabin (332) connected, and the gate plate (41) is moved to open the falling channel.

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