Environment-friendly conveying device for gold tailings

Abstract

This invention belongs to the technical field of conveying devices, and discloses an environmentally friendly conveying device for gold tailings, comprising: a feeding machine equipped with an inlet hopper and an outlet hopper, the outlet hopper being equipped with a first water spray nozzle; a conveyor, the beginning of which is located below the outlet hopper, and the end of which is equipped with a second water spray nozzle; a scraping box, which is located below the conveyor belt on the conveyor, with conveyor belt through holes on both the left and right sides of the top of the scraping box; and a liftable scraper assembly, which is located on the top of the scraping box, with elastic scrapers on the liftable scraper assembly placed inside the scraping box, the top of the elastic scrapers contacting the outer side of the lower belt of the conveyor belt. This device is convenient to use, requires minimal disassembly and assembly, reduces workload, generates low noise, and is highly environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of conveying device technology, and more specifically to an environmentally friendly conveying device for gold tailings. Background Technology

[0002] Tailings are the waste gas emitted by ore processing plants after grinding ore and extracting useful components through a certain process. However, tailings are not entirely useless waste; they often contain components that can be used for other purposes. Therefore, current technologies typically involve recycling and reusing gold tailings. However, because ore is easily weathered, it easily generates dust pollution during transportation or conveying, especially on conveyor belts. When ore falls, it easily creates dust, causing secondary pollution. Current technologies mostly use fans to directly suck up these dust particles. While this can solve some of the dust pollution problem, there is often a lack of suitable recovery devices for dust particles adhering to the belt surface. Especially when the conveyor belt rotates or the suction system starts working, dust can easily be generated again, resulting in low recovery efficiency.

[0003] To address these issues, existing technologies, such as CN 112573248 B, entitled "A Dust Isolation and Recovery Device for a Gold Tailings Conveyor Belt," employ a method involving welding a cam to the circumferential side of the driven roller and installing a main rocker arm and an auxiliary rocker arm between the roller and two baffles. During rotation, the cam sequentially moves the main and auxiliary rocker arms, leveraging the lever principle to raise and lower the main and auxiliary hammers, striking the conveyor belt and dislodging the tailings sand adhering to the belt surface into a dust collection trough. Simultaneously, by installing a filter screen and an air compressor trough within the dust collection box, a blower creates a negative pressure within the air compressor trough, assisting the dust collection box in drawing the dislodged dust into the dust collection trough.

[0004] However, the aforementioned recycling device requires several dust collection boxes to be arranged along the length of the conveyor belt below it. This means that multiple dust collection boxes need to be installed manually under the conveyor belt one by one, which undoubtedly increases the workload of assembling and disassembling the recycling device, thus increasing the labor intensity of the personnel. Moreover, for conveyor belts with long conveying distances, the workload of assembly also increases, making it inconvenient to use. In addition, the main hammer and auxiliary hammer of the recycling device need to be raised and lowered sequentially to strike the conveyor belt, which generates noise and also has a serious impact on the external environment and workers. Furthermore, the exhaust fan generally generates a lot of noise when it is working, further aggravating the noise pollution of the environment and making the working environment of on-site workers poor.

[0005] Therefore, how to provide a gold tailings environmental protection conveying device that is easy to use, requires minimal disassembly and assembly, reduces workload, generates less noise, and provides a good working environment for on-site workers is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides an environmentally friendly gold tailings conveying device that is easy to use, requires no excessive disassembly or assembly, reduces the workload of personnel, generates less noise, and provides a good working environment for on-site workers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An environmentally friendly gold tailings conveying device includes:

[0009] The feeding machine is equipped with an inlet hopper and an outlet hopper at its low and high ends, respectively. The outlet hopper is equipped with a first water spray nozzle for spraying water to suppress dust in the tailings discharged from the outlet hopper.

[0010] The conveyor has its starting end located below the discharge hopper, and its ending end is equipped with a second water spray nozzle for spraying water to suppress dust from the tailings falling at that end.

[0011] A scraping box is provided below the conveyor belt on the conveyor, and conveyor belt through holes are provided on the left and right side walls of the top of the scraping box.

[0012] A liftable scraper assembly is provided at the top of the scraping box. The elastic scraper on the liftable scraper assembly is placed inside the scraping box. The top of the elastic scraper contacts the outer side of the lower belt of the conveyor belt and is used to scrape the tailings adhering to the outer side of the lower belt to the scraping box.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an environmentally friendly conveying device for gold tailings. Before use, the elastic scraper of the liftable scraper assembly is moved upward and adjusted to contact the outer side of the lower belt. The lower belt is adjusted to bend upward under the lifting action of the elastic scraper. In this way, the elastic scraper can not only scrape off the tailings adhering to the outer side of the lower belt, but also pre-tighten the conveyor belt, which can reduce the setting of the conveyor belt pre-tensioning wheel and reduce the complexity of the device. Then, the feeding machine and conveyor of the device are started. The workers put the generated tailings into the feed hopper at the lower end of the feeding machine. After being conveyed by the feeding machine, the tailings fall into the conveyor belt of the conveyor below through the discharge hopper at the upper end. There is no need for manual delivery of tailings directly to the higher conveyor, which can reduce the labor intensity of manual feeding. As the tailings fall from the discharge hopper, the first water spray nozzle sprays water to suppress dust and wet the tailings to prevent dust pollution during the fall. The wet tailings are conveyed by the conveyor belt and finally fall into the predetermined position (such as the tailings temporary storage area) at the end of the conveyor belt. During the fall of the tailings at the end of the conveyor belt, the second water spray nozzle also sprays water to prevent dust pollution when the tailings at the beginning are not wetted. This ensures that no dust is generated during the entire transportation process and improves the environmental friendliness of the transportation. When the lower belt of the conveyor belt enters the scraping box through the conveyor belt through-hole, the tailings adhering to the outer surface of the lower belt are scraped off into the scraping box by the action of the elastic scraper. This achieves the scraping operation of tailings adhering to the surface of the conveyor belt, realizing the purpose of tailings recovery and conveyor belt cleaning. During this scraping operation, because the elastic scraper itself has a certain degree of elasticity, that is, the contact between the elastic scraper and the lower belt is elastic contact rather than rigid contact. In other words, the upward lifting force exerted by the elastic scraper on the conveyor belt during operation is floating. This reduces the problem of increased friction between the lower belt and the elastic scraper due to the fixed and large lifting support force, thus accelerating the wear rate of the conveyor belt and appropriately extending its service life. Therefore, compared with the existing structure, this device has the advantages of simple structure, no need to install a lot of dust collection boxes, and can reduce the workload of on-site personnel in disassembling and assembling the device. Furthermore, the device uses a scraping method to remove and recycle tailings adhering to the conveyor belt. Compared with methods such as tapping the conveyor belt and using a blower for recycling, it generates less noise and does not cause noise pollution. In addition, water spray nozzles are installed at both the beginning and end of the conveyor belt, which effectively ensures that no dust pollution is generated during the tailings transportation process, greatly improving the environmental friendliness of the device. At the same time, it also provides a good working environment with low noise and no dust for on-site personnel.

[0014] Furthermore, the scraping box has through holes on both the front and rear sides and mounting plates fixed thereon, with the mounting plates located below the through holes. The liftable scraper assembly includes:

[0015] The drive unit, comprising two units, is respectively mounted on the corresponding mounting plate and located on the front and rear sides of the scraping box;

[0016] An L-shaped lifting base plate is disposed inside the scraping box. The two ends of the horizontal plate of the L-shaped lifting base plate extend out of the scraping box through two through holes and are connected to the drive unit, so that the drive unit drives the L-shaped lifting base plate to move up and down. The elastic scraper is connected to the vertical plate of the L-shaped lifting base plate through multiple floating connecting rods.

[0017] The first spring, there are multiple first springs, which are respectively sleeved on multiple floating connecting rods, and the two ends of the first spring abut against one side of the vertical plate and the elastic scraper respectively;

[0018] The second spring, which consists of multiple springs, has one end fixed at a distance on the top surface of the transverse plate, and the other end of each spring is fixedly connected to the bottom surface of the elastic scraper.

[0019] The beneficial effects of adopting the above technical solution are as follows: the drive unit moves the L-shaped lifting base plate upward, thereby causing the top of the elastic scraper to abut against the outer side of the lower belt to remove the tailings adhering to the lower belt. The elastic scraper is set on the L-shaped lifting base plate through a floating connecting rod, a first spring, and a second spring, so that the elastic scraper has a certain amount of floating in the left-right and up-down directions. This makes the upward lifting force of the elastic scraper on the conveyor belt during operation floating, which can reduce the problem of increased friction between the lower belt and the elastic scraper due to the fixed and large lifting support force on the conveyor belt, thereby accelerating the wear rate of the conveyor belt and appropriately extending the service life of the conveyor belt.

[0020] Furthermore, anti-detachment caps are fixed at both ends of the floating connecting rod, and the two anti-detachment caps are respectively stopped on the other side of the vertical plate and the elastic scraper.

[0021] The beneficial effects of adopting the above technical solution are: preventing the two ends of the floating connecting rod from coming off the vertical plate and the elastic scraper, and ensuring the effective connection between the vertical plate and the elastic scraper.

[0022] Furthermore, the drive unit is an electric actuator, a cylinder, or a screw.

[0023] The beneficial effects of adopting the above technical solutions are: electric actuators or cylinders can achieve automatic drive without manual adjustment, but the cost is high; screws, on the other hand, require manual adjustment, but the cost is low.

[0024] Furthermore, when the driving part is a screw, one end of the screw is rotatably connected to the mounting plate via a bearing, and the other end is a rotating cap end. The screw is threadedly connected to the threaded holes on both ends of the transverse plate.

[0025] The beneficial effects of adopting the above technical solution are: by manually rotating the cap end, the screw rotation will drive the horizontal plate to move up and down, thereby realizing the contact and disengagement of the elastic scraper with the lower belt.

[0026] Furthermore, a third water spray nozzle is installed on the wall of the scraping box, with the water spray direction facing the outer surface of the lower belt.

[0027] The beneficial effects of adopting the above technical solution are as follows: when the conveyor belt needs to be cleaned, the third nozzle can perform high-pressure cleaning on the outer surface of the scraped conveyor belt, realizing the self-cleaning function of the conveyor belt, eliminating the need for manual rinsing, reducing labor intensity, and the high-pressure water sprayed by the third nozzle can spray down the unscraped tailings, ensuring that all tailings adhering to the conveyor belt can be detached and recycled.

[0028] Furthermore, the bottom of the scraping box is provided with a tailings slurry discharge pipe, and a suction pump is installed on the tailings slurry discharge pipe.

[0029] The beneficial effect of adopting the above technical solution is that by turning on the suction pump, the tailings slurry inside the scraping box can be discharged and recycled.

[0030] Furthermore, it also includes two tailings baffles installed on both sides of the conveyor belt.

[0031] The beneficial effect of adopting the above technical solution is that it can prevent tailings from falling off both sides of the conveyor belt during the tailings transportation process, thus avoiding affecting the transportation efficiency.

[0032] Furthermore, it also includes a scraping mechanism for scraping off tailings adhering to the inner side of the tailings baffle.

[0033] Furthermore, the scraping mechanism includes:

[0034] An electric motor, which is fixed to the outer surface of the tailings baffle;

[0035] A transmission screw, one end of which is fixed to the drive end of the motor, and the other end of which is rotatably connected to a fixed plate on the tailings baffle.

[0036] A movable frame spans across the conveyor belt, and one side of the bottom of the movable frame is threadedly connected to the transmission screw to move the movable frame along the conveying direction of the conveyor belt.

[0037] The electric actuators are two electric actuators arranged at intervals on the movable frame. The telescopic ends of the two electric actuators are fixed with lifting scrapers for scraping off the tailings adhering to the inner side of the tailings baffle.

[0038] The beneficial effects of adopting the above technical solution are as follows: When relatively wet tailings are conveyed on the conveyor belt, tailings will inevitably adhere to the inner side of the baffle. After these tailings accumulate on the inner side of the baffle, they will hinder the normal conveying of tailings on the conveyor belt. At this time, the electric push rod drives the lifting scraper to descend to the appropriate position, the motor drives the transmission screw to rotate, and the transmission screw drives the moving frame to move along the conveying direction. Then, the lifting scraper scrapes the tailings adhering to the inner side of the baffle to the end of the conveyor belt and falls to the predetermined position, realizing the scraping operation of tailings on the inner side of the baffle and ensuring the normal conveying of tailings. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 This is a first-view three-dimensional structural diagram of an environmentally friendly gold tailings conveying device provided by the present invention.

[0041] Figure 2 This is a two-dimensional structural schematic diagram of an environmentally friendly gold tailings conveying device provided by the present invention, from a second perspective.

[0042] Figure 3 for Figure 1 A schematic diagram of the main structure.

[0043] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the mid-section AA.

[0044] Figure 5 This is a schematic diagram of the structure of a liftable scraper assembly.

[0045] Figure 6 A schematic diagram of a scraping box equipped with a third water spray nozzle. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] See Figures 1-6 This invention discloses an environmentally friendly gold tailings conveying device, comprising:

[0048] The feeder 1 has an inlet hopper 101 and an outlet hopper 102 at its low and high positions, respectively. The outlet hopper 102 is equipped with a first water spray nozzle 2 for spraying water to reduce dust on the tailings discharged from the outlet hopper 102.

[0049] The conveyor 3 has its starting end located below the discharge hopper 102, and its end is equipped with a second water spray nozzle 4 for spraying water to suppress dust on the tailings falling at that end.

[0050] Scraping box 5 is located below the conveyor belt 31 on the conveyor 3. The left and right sides of the top of the scraping box 5 are provided with conveyor belt through holes 501.

[0051] The liftable scraper assembly 6 is located on the top of the scraping box 5. The elastic scraper 63 on the liftable scraper assembly 6 is placed inside the scraping box 5. The top of the elastic scraper 63 contacts the outer side of the lower belt 311 of the conveyor belt 31, and is used to scrape the tailings adhering to the outer side of the lower belt 311 to the scraping box 5.

[0052] Specifically, the scraping box 5 has through holes 502 on both the front and rear sides of its walls, and mounting plates 7 are fixed thereon. The mounting plates 7 are located below the through holes 502. The liftable scraper assembly 6 includes:

[0053] There are two drive units 61, which are respectively mounted on the corresponding mounting plates 7 and located on the front and rear sides of the scraping box 5.

[0054] The L-shaped lifting base plate 62 is installed inside the scraping box 5. The two ends of the horizontal plate 621 of the L-shaped lifting base plate 62 extend out of the scraping box 5 through two through holes 502 and are connected to the drive unit 61 so that the drive unit 61 drives the L-shaped lifting base plate 62 to move up and down. The elastic scraper 63 is connected to the vertical plate 622 of the L-shaped lifting base plate 62 through multiple floating connecting rods 64.

[0055] There are multiple first springs 65, which are respectively sleeved on multiple floating connecting rods 64. The two ends of the first springs 65 abut against one side of the vertical plate 622 and the elastic scraper 63, respectively.

[0056] There are multiple second springs 66, one end of which is fixed at intervals on the top surface of the transverse plate 621, and the other end of each is fixedly connected to the bottom surface of the elastic scraper 63.

[0057] The two ends of the floating connecting rod 64 are respectively fixed with anti-detachment caps 641, and the two anti-detachment caps 641 are respectively stopped on the other side of the vertical plate 622 and the elastic scraper 63.

[0058] In the above embodiments, the drive unit 61 can be an electric actuator, a cylinder, or a screw. When the drive unit 61 is a screw, one end of the screw is rotatably connected to the mounting plate 7 via a bearing 8, and the other end is a rotating cap end 9. The screw is threadedly connected to the threaded holes 6211 on both ends of the transverse plate 621.

[0059] In some embodiments, a third water spray nozzle 10 is installed on the wall of the scraping box 5, with the spray direction facing the outer surface of the lower conveyor belt 311. A tailings slurry discharge pipe 11 is provided at the bottom of the scraping box 5, and a suction pump 12 is installed on the tailings slurry discharge pipe 11. Thus, the wastewater from the third water spray nozzle cleaning the outer surface of the conveyor belt mixes with the tailings scraped into the scraping box to form a tailings slurry, which can be directly suctioned and discharged to the tailings temporary storage area by the suction pump.

[0060] In some embodiments, the gold tailings environmental protection conveying device further includes two tailings baffles 13 disposed on both sides of the conveyor belt 31.

[0061] In the above embodiments, a scraping mechanism 14 is also included for scraping off tailings adhering to the inner side of the tailings baffle 13.

[0062] Specifically, the scraping mechanism 14 includes:

[0063] Motor 141 is fixed to the outer side of tailings baffle 13;

[0064] The transmission screw 142 has one end fixed to the drive end of the motor 141, and the other end rotatably connected to the fixed plate 143 on the tailings baffle 13.

[0065] The movable frame 144 spans across the conveyor belt 31, and one side of the bottom of the movable frame 144 is threadedly connected to the transmission screw 142 to move the movable frame 144 along the conveying direction of the conveyor belt 31.

[0066] Electric actuators 145 are two electric actuators 145 arranged at intervals on the movable frame 144. The telescopic ends of the two electric actuators 145 are fixed with lifting scrapers 146 for scraping off the tailings adhering to the inner side of the tailings baffle 13.

[0067] Before use, the device of the present invention drives the L-shaped lifting base plate to move upward by the drive unit, so that the top of the elastic scraper abuts against the outer side of the lower belt, and adjusts the lower belt to bend upward under the lifting action of the elastic scraper. In this way, the elastic scraper can not only scrape off the tailings adhering to the outer side of the lower belt, but also pre-tighten the conveyor belt, which can reduce the setting of the conveyor belt pre-tensioning wheel and reduce the complexity of the device. Then, the feeding machine and conveyor of the device are started. The workers put the generated tailings into the feed hopper at the lower end of the feeding machine. After being conveyed by the feeding machine, the tailings fall into the conveyor belt of the conveyor below through the discharge hopper at the upper end. There is no need for manual delivery of tailings directly to the higher conveyor, which can reduce the labor intensity of manual feeding. As the tailings fall from the discharge hopper, the first water spray nozzle sprays water to suppress dust and wet the tailings to prevent dust pollution during the fall. The wet tailings are conveyed by the conveyor belt and finally fall into the predetermined position (such as the tailings temporary storage area) at the end of the conveyor belt. During the fall of the tailings at the end of the conveyor belt, the second water spray nozzle also sprays water to prevent dust pollution when the tailings at the beginning are not wetted. This ensures that no dust is generated during the entire transportation process (dust covers can also be installed on the conveyor belt), improving the environmental friendliness of the transportation. When the lower belt of the conveyor belt enters the scraping box through the conveyor belt through-hole, the tailings adhering to the outer surface of the lower belt are scraped off into the scraping box by the action of the elastic scraper. Simultaneously, the third water spray nozzle performs high-pressure washing on the conveyor belt, thus achieving the scraping and cleaning of the tailings adhering to the conveyor belt surface, achieving the purpose of tailings recovery and conveyor belt cleaning. During this scraping operation, because the elastic scraper is set on the L-shaped lifting base plate through a floating connecting rod, the first spring, and the second spring, the elastic scraper has a certain amount of floating in the left-right and up-down directions. That is, the contact between the elastic scraper and the lower belt is elastic contact, not rigid contact. In other words, the upward lifting force exerted by the elastic scraper on the conveyor belt during operation is floating. This reduces the problem of increased friction between the lower belt and the elastic scraper due to the fixed and large lifting support force, which would accelerate the wear rate of the conveyor belt and appropriately extend its service life. Therefore, compared with existing structures, this device has a simple structure, requires no additional dust collection boxes, and reduces the workload of on-site personnel in disassembling and assembling the device. Furthermore, the device uses scraping and high-pressure washing to scrape and recycle tailings adhering to the conveyor belt. Compared with methods such as knocking the conveyor belt and using exhaust fans for recycling, it generates less noise and does not cause noise pollution. In addition, water spray nozzles are installed at both the beginning and end of the conveyor belt to effectively ensure that no dust pollution is generated during the tailings transportation process, which greatly improves the environmental friendliness of the device and provides a good working environment with low noise and no dust for on-site personnel.

[0068] In addition, when a large amount of tailings adhered to the inner side of the baffle accumulates and obstructs the normal transport of tailings on the conveyor belt, the electric actuator drives the lifting scraper to descend to an appropriate position, the motor drives the transmission screw to rotate, and the transmission screw drives the moving frame to move along the conveying direction. In turn, the lifting scraper scrapes the tailings adhered to the inner side of the baffle to the end of the conveyor belt and falls to a predetermined position (such as the tailings temporary storage area), thus realizing the scraping operation of tailings inside the baffle and ensuring the normal transport of tailings.

[0069] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally friendly gold tailings conveying device, characterized in that, include: The feeder (1) is provided with a feed hopper (101) and a discharge hopper (102) at its low and high positions respectively. The discharge hopper (102) is equipped with a first water spray nozzle (2) for spraying water to reduce dust on the tailings discharged from the discharge hopper (102). The conveyor (3) is located below the discharge hopper (102) at its beginning and is provided with a second water spray nozzle (4) at its end for spraying water to reduce dust on the tailings that fall at the end. Scraping box (5), the scraping box (5) is located below the conveyor belt (31) on the conveyor (3), and conveyor belt through holes (501) are opened on the left and right sides of the top of the scraping box (5). A liftable scraper assembly (6) is provided on the top of the scraper box (5). An elastic scraper (63) on the liftable scraper assembly (6) is placed inside the scraper box (5). The top of the elastic scraper (63) contacts the outer side of the lower belt (311) of the conveyor belt (31) and is used to scrape the tailings adhering to the outer side of the lower belt (311) to the scraper box (5). The scraping box (5) has through holes (502) on both the front and rear sides of the box wall and a mounting plate (7) is fixed thereon. The mounting plate (7) is located below the through holes (502). The liftable scraper assembly (6) includes: Two drive units (61) are installed on the corresponding mounting plates (7) and located on the front and rear sides of the scraping box (5). The L-shaped lifting base plate (62) is disposed inside the scraping box (5). The two ends of the horizontal plate (621) of the L-shaped lifting base plate (62) extend out of the scraping box (5) through the two through holes (502) and are connected to the drive unit (61) so that the drive unit (61) drives the L-shaped lifting base plate (62) to move up and down. The elastic scraper (63) is connected to the vertical plate (622) of the L-shaped lifting base plate (62) through multiple floating connecting rods (64). The first spring (65) is multiple, and is respectively sleeved on multiple floating connecting rods (64). The two ends of the first spring (65) respectively abut against one side of the vertical plate (622) and the elastic scraper (63). The second spring (66) is multiple, with one end fixed at a distance on the top surface of the transverse plate (621), and the other end fixedly connected to the bottom surface of the elastic scraper (63). The two ends of the floating connecting rod (64) are respectively fixed with anti-detachment caps (641), and the two anti-detachment caps (641) are respectively stopped on the other side of the vertical plate (622) and the elastic scraper (63); The drive unit (61) is an electric actuator, a cylinder, or a screw; When the drive unit (61) is a screw, one end of the screw is rotatably connected to the mounting plate (7) through a bearing (8), and the other end is a rotating cap end (9). The screw is threadedly connected to the threaded holes (6211) on both ends of the transverse plate (621). The scraping box (5) is equipped with a third water spray nozzle (10) with the water spray direction facing the outer surface of the lower belt (311). The bottom of the scraping box (5) is provided with a tailings slurry discharge pipe (11), and a suction pump (12) is installed on the tailings slurry discharge pipe (11). It also includes two tailings baffles (13) disposed on both sides of the conveyor belt (31); It also includes a scraping mechanism (14) for scraping off tailings adhering to the inner side of the tailings baffle (13). The scraping mechanism (14) includes: The motor (141) is fixed on the outer side of the tailings baffle (13); The transmission screw (142) has one end fixed to the drive end of the motor (141) and the other end rotatably connected to the fixing plate (143) on the tailings baffle (13). A movable frame (144) spans across the conveyor belt (31), and one side of the bottom of the movable frame (144) is threadedly connected to the transmission screw (142) to move the movable frame (144) along the conveying direction of the conveyor belt (31). Electric actuators (145), two of which are spaced apart on the movable frame (144), and the telescopic ends of the two electric actuators (145) are fixed with lifting scrapers (146) for scraping off the tailings adhering to the inner side of the tailings baffle (13).

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