A circular fabric tail-wagging device

Abstract

A circular feeding and tailing device belongs to the field of crushing-magnetic separation technology in mineral processing plants. It includes a crushing device, a tailing device, and a frame. The crushing device and tailing device are mounted on the frame, with the crushing device positioned at the upper end of the tailing device. The crushing device includes a main housing, a moving cone, a transmission unit, and a base. The base is bolted to the upper platform of the frame. The main housing is connected to the base, and the moving cone is connected to the transmission unit. Both the moving cone and the transmission unit are housed within the main housing. The tailing device includes a roughing device, a cleaning device, and a scavenging device. The roughing device is connected to both the cleaning and scavenging devices. This invention integrates the crusher, including the roughing, cleaning, and scavenging devices, and the discharge hopper onto a single longitudinal frame from top to bottom, forming an integrated arrangement of crushing and tailing. This arrangement offers high integration, a small footprint, and eliminates the need for an additional independent pre-selection belt conveyor and pre-selection plant, thus reducing equipment operating and maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of crushing-magnetic separation technology in mineral processing plants, and specifically relates to a circular feeding and tailing device. Background Technology

[0002] Currently, since most iron ore types have a certain degree of magnetism, magnetic separation is the most important beneficiation method for iron ore. Strongly magnetic minerals such as magnetite and titanomagnetite are mostly separated using drum magnetic separators, while weakly magnetic minerals such as hematite, limonite, and specularite are mostly separated using vertical ring strong magnetic separators and horizontal ring strong magnetic separators.

[0003] Magnetite is currently the most abundant and widely used iron ore. Due to its strong magnetism, magnetite is separated and recovered using magnetic separators with relatively low magnetic field strength. Before entering the grinding mill, magnetite typically undergoes three or four stages of crushing. Each stage of crushing liberates the magnetite ore, generating some individual gangue stones that do not contain magnetite. These gangue stones should be separated and disposed of as tailings, thereby reducing the amount of ore fed into the grinding and beneficiation process, lowering energy consumption and equipment investment, and ultimately improving the economic efficiency of the beneficiation plant.

[0004] Current crushing equipment can be divided into two categories according to its discharge method: one is the circumferential discharge type, which mainly includes gyratory crushers and cone crushers; the other is the belt discharge type, such as jaw crushers, single-tooth roll crushers, double-roll crushers, and high-pressure roller mills. The present invention is applicable to circumferential discharge crushers.

[0005] For circular discharge crushers, the discharge material layer is relatively thin, which is conducive to the penetration of the tailing field and optimizes the separation effect. However, in this discharge method, the material falls in a 360-degree circular pattern, and there is currently no magnetic separation equipment specifically designed for this discharge method. This poses a great challenge to tailing at the crusher discharge point.

[0006] Furthermore, for circular discharge crushers, during the tailing process, the mixing of ore and gangue causes some of the tailings that should be discarded to enter the roughing concentrate, while some useful ore is carried into the tailings and cannot be recovered. This leads to a decrease in the recovery rate of magnetic iron in the final concentrate and a drop in grade.

[0007] Current magnetite tailings operations all require independent belt magnetic separation equipment, which generally require a crushing workshop and a tailings workshop. The tailings workshop also needs to be equipped with a buffer silo, which increases the investment in equipment and plant.

[0008] This requires us to develop a circular feeding and tailing device with high magnetic iron recovery rate and high magnetic concentrate grade, which can integrate crushing and tailing operations into one unit to reduce equipment and plant investment and lower operating costs. Summary of the Invention

[0009] To address the aforementioned problems, this invention proposes a circular fabric tailing device, comprising a crushing device, a tailing device, and a frame, wherein the crushing device and the tailing device are mounted on the frame, with the crushing device positioned at the upper end of the tailing device.

[0010] The beneficial effects of this invention are as follows: The device of this invention integrates the crusher, the magnetic separation unit including the coarse separation, fine separation and scavenging devices and the discharge hopper on the same longitudinal frame from top to bottom, forming an integrated arrangement of crushing and tailing, thereby creating an integrated crushing-coarse magnetic separation-fine magnetic separation-scavenging magnetic separation machine. This method has a high degree of integration, occupies a small area, and does not require the setting of an additional independent tailing belt conveyor and tailing plant, thus reducing equipment investment, plant investment, and equipment operation and maintenance costs.

[0011] This invention employs a rotary feed inner ring and a fixed annular magnetic separator to achieve tailings discharge from the crusher in a circular fashion. Magnetic ore adheres to the outer side of the inner ring of the coarse feed hopper corresponding to the annular magnetic separator. As the inner ring of the feed hopper rotates, the ore is discharged into the lower ore discharge hopper, while tailings that are not magnetic and cannot be adsorbed onto the inner ring of the feed hopper are discharged into the lower tailings discharge hopper. This structural method completes separation and discharge as the crusher discharges vertically, resulting in a compact structure, small footprint, and low investment.

[0012] The device of this invention employs a ring-shaped magnetic separator for roughing, which features a large magnetic separation area, a thin material layer, and minimal attenuation of the magnetic field strength as it penetrates the material layer. This facilitates deep separation across the entire thickness of the material layer, achieving a single deep tailings separation during roughing and ensuring a high recovery rate of magnetically separated iron. Furthermore, the magnetic separator's cross-sectional circumferential angle is 300 degrees, ensuring that the majority of the circumference is used for magnetic separation, guaranteeing optimal separation efficiency. The remaining 60-degree non-magnetic separation zone treats both the feed material and the tailings as ore products. This structure avoids the loss of magnetic minerals in the feed material within the non-magnetic separation zone, thus ensuring a high recovery rate of magnetic iron from magnetite and laying the foundation for high profitability for the concentrator.

[0013] The device of the present invention adopts a rotary magnetic separation method for coarse separation, which makes full use of the advantage of the relatively thin vertical two layers of the annular circumferential discharge port of the crusher, so that the material layer is close to the surface of the annular magnetic separator, thereby preventing the situation where some ore cannot be adsorbed due to excessive distance and low field strength, and ensuring the efficient recovery of magnetic iron.

[0014] The device of the present invention has a coarse-selection feeding hopper, annular magnet, and discharge hopper, all of which are annular structures with a small upper opening and a large lower opening, and a generatrix inclination angle of 75-85 degrees. This structure not only ensures sufficient sorting area, but also ensures sufficient longitudinal rolling downward movement of materials on the annular surface for sorting distance and sorting time, thus optimizing the sorting effect.

[0015] The field strength of the roughing annular magnetic separator of the present invention is 300-500mT, which is sufficient to ensure the effective recovery of most magnetic ores and further ensures the high recovery rate of magnetic iron in the roughing product.

[0016] The rotating motor on the inner ring surface of the feeding hopper of the present invention is a variable frequency speed control motor, which can adjust the sorting time of the inner ring surface of the feeding hopper in the magnetic separation zone, thereby effectively controlling the sorting effect.

[0017] This invention feeds a roughing concentrate into a cleaning hopper, and utilizes the inclined taper of the roughing ore discharge hopper to achieve a vertical strip-like bundled distribution of the roughing ore product during the cleaning process. This optimizes the adsorption effect of the cleaned product and achieves a second separation of the roughing ore through the cleaning process. The cleaning field strength is the same as that of the roughing field strength, thus enabling a second separation of the roughing ore. This not only separates the ore that was not roughed in the 60-degree non-sorting zone during roughing, removing the tailings from this portion of the ore, but also removes the gangue mixed into the ore during roughing, thereby improving the grade of the tailings concentrate.

[0018] The present invention achieves the adsorption of magnetic ore in the vertical section of the sorting plate by covering the sorting plate with a conveyor belt, and realizes the movement of magnetic ore from the vertical direction to the near horizontal direction through a 110-130° bend. Then, it is transported by the conveyor belt to the rear of the bend plate, and unloaded to the ore side of the discharge section under the action of a single inertia. This method realizes the adsorption-turning-unloading of ore, with a simple and practical structure and low manufacturing cost.

[0019] The device of the present invention employs a sorting plate for sorting, with the entire plate surface being an effective sorting area, resulting in a large sorting area. Furthermore, the material falls under gravity with increasing speed, while the plate surface is relatively high, thereby extending the sorting time, ensuring the recovery of the sorted ore, and optimizing the sorting effect.

[0020] The sorting unit of the device of the present invention achieves the turning of the conveyor belt on the upper and lower sides of the sorting plate through the redirecting rollers A and B. This roller turning method is beneficial for energy saving and reducing conveyor belt wear. The conveyor belt is relatively short, thus eliminating the need for intermediate supports and idlers, reducing manufacturing costs.

[0021] This invention feeds the tailings from a roughing stage into a scavenging stage feed hopper. The inclined constriction of the roughing tailings discharge hopper enables the vertically bundled, strip-like distribution of the roughing tailings product during the scavenging stage, optimizing the adsorption effect of the scavenged product. Furthermore, the scavenging process achieves secondary separation of the roughing tailings. The electric field strength in scavenging is 1.2-1.4 times that of roughing, allowing for the recovery of some weakly magnetic ore-gangue chains, as well as the recovery of ore entrained in the tailings during roughing. This improves the recovery rate of the final concentrate from the tailings disposal process.

[0022] The magnetic separator roller of the present invention is lined with 30mm-80mm of wear-resistant rubber, which effectively ensures the service life of the magnetic separator roller, reduces the maintenance frequency of the magnetic separator roller, and improves the equipment operating rate.

[0023] The transmission devices for the selection and sweeping processes in this invention can be frequency-controlled to adjust the speed of the selection conveyor belt and the sweeping roller, thereby adjusting the inertial kinetic energy of the adsorbed magnetic ore during unloading, changing the unloading trajectory of the magnetic ore, and thus adjusting the proportion of material on both sides of the respective separator plates to maximize the recovery rate of magnetic iron in the dry-concentrated concentrate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circumferential fabric tail-wagging device of the present invention;

[0025] Figure 2 Top view disassembly of the coarse selection device of the present invention Figure 1 ;

[0026] Figure 3 Top view disassembly of the coarse selection device of the present invention Figure 2 ;

[0027] Figure 4 Top view disassembly of the coarse selection device of the present invention Figure 3 ;

[0028] Figure 5 Top view disassembly of the coarse selection device of the present invention Figure 4 ;

[0029] Figure 6 Top view disassembly of the coarse selection device of the present invention Figure 5 .

[0030] The attached figures are labeled as follows: 1. Frame; 2. Main housing; 3. Moving cone; 4. Base; 5. Upper platform; 6. Coarsening device; 7. Fine-graining feed hopper; 8. Fine-graining sorting plate; 9. First redirecting roller; 10. Second redirecting roller; 11. Drive roller; 12. Conveyor belt; 13. Drive device; 14. Sweeping feed hopper; 15. Sweeping magnetic separation roller; 16. Fixed outer ring surface; 17. Rotating inner ring surface; 18. Inner ring top plate; 19. Coarsening base; 20. Middle platform; 21. Rotating central shaft; 22. Variable frequency drive motor. 3. Bearing support; 24. Annular magnetic separator; 25. Support; 26. Roughing ore discharge hopper; 27. Roughing tailings discharge hopper; 28. Tailings discharge port; 29. ​​Ore discharge port; 30. Cleaning base; 31. Lower platform; 32. Cleaning box; 33. Cleaning tailings discharge chute; 34. Cleaning ore discharge chute; 35. Cleaning longitudinal vertical partition plate; 36. Scavenging base; 37. Scavenging box; 38. Permanent magnet system; 39. Scavenging tailings discharge chute; 40. Scavenging ore discharge chute; 41. Scavenging longitudinal vertical partition plate. Detailed Implementation

[0031] Example 1

[0032] A circular fabric tail-wagging device, such as Figures 1-6 As shown, it includes a crushing device, a tail-swinging device and a frame 1. The crushing device and the tail-swinging device are installed on the frame 1, and the crushing device is located at the upper end of the tail-swinging device.

[0033] The crushing device includes a main housing 2, a moving cone 3, a transmission part, and a base 4. The base 4 is bolted to the upper platform 5 of the frame 1. The main housing 2 is connected to the base 4. The moving cone 3 is connected to the transmission part. Both the moving cone 3 and the transmission part are located inside the main housing 2.

[0034] The tail-flipping device consists of a coarse selection device 6, a fine selection device, and a sweeping device, with the coarse selection device 6 connected to the fine selection device and the sweeping device.

[0035] The coarsening device 6 includes a coarsening feed hopper, a coarsening magnetic separator, and a coarsening discharge hopper. The coarsening feed hopper is located below the annular circumferential discharge port of the crusher. The coarsening feed hopper is an annular cavity with a small upper opening and a large lower opening, and a generatrix inclination angle of 75-85 degrees, formed by a fixed outer ring surface 16, a rotating inner ring surface 17, and an inner ring top plate 18. The upper opening of the fixed outer ring surface 16 is located 50-100 mm outside the circumferential discharge port of the crusher, and the upper opening of the rotating inner ring surface 17 is located 50-100 mm inside the circumferential discharge port of the crusher. The fixed outer ring surface 16 is bolted to the middle platform 20 of the frame through the coarsening base 19 on its outer side.

[0036] The rotating inner ring surface 17 has a rotating structure. One end of the rotating central shaft 21 is bolted to the bottom of the inner ring top plate 18. The top of the rotating central shaft 21 passes through the inner ring top plate 18 and is movably connected to the upper platform 5. The other end of the rotating central shaft 21 passes through the middle platform 20 and is connected to the variable frequency rotating motor 22. The rotating central shaft 21 is movably connected to the bearing support 23, and the bearing support 23 is bolted to the middle platform 20. The structure of the coarse magnetic separator is also an annular magnetic separator 24 with a small upper opening and a large lower opening. The annular magnetic separator 24 is concentrically built into the coarse feed hopper. Its upper edge is 100-150mm away from the lower edge of the top plate of the coarse feed hopper; its outer edge is 100-200mm away from the inner side of the coarse feed hopper. The inclination angle of the generatrix is ​​consistent with that of the coarse feed hopper. The annular magnetic separator 24 has a cross-sectional circumferential angle of 300 degrees, with the remaining 60 degrees of the annular body being empty. It is made of permanent magnet, and its outer surface field strength is 300-500mT. The annular magnetic separator 24 is bolted to the middle platform 20 of the frame 1 through the bracket 25.

[0037] The roughing discharge hopper is located below the roughing feed hopper and includes a roughing ore discharge hopper 26 and a roughing tailings discharge hopper 27. The roughing tailings discharge hopper 27 is located below the tailings discharge port 28 formed by the inner rotating ring surface 17 corresponding to the 300-degree annular magnetic separator and the fixed outer ring surface 16 of the roughing feed hopper. The roughing ore discharge hopper 26 is located below the ore discharge port 29 formed by the inner rotating ring surface 17 corresponding to the vacant part of the 60-degree non-annular magnetic separator and the fixed outer ring surface 16 of the roughing feed hopper. Both the roughing ore discharge hopper 26 and the roughing tailings discharge hopper 27 are constricted hoppers with annular openings at the top and elongated square openings at the bottom.

[0038] The refining device includes a refining feed hopper 7, a refining sorting plate 8, a first redirecting roller 9, a second redirecting roller 10, a drive roller 11, a conveyor belt 12, a transmission device 13, and a refining discharge hopper. The transmission device 13 includes a refining drive motor that drives the drive roller 11. The refining feed hopper 7 is a box-shaped structure located below the outlet of the roughing ore discharge hopper. The refining feed hopper 7 is flange-connected to the refining box 32. The refining sorting plate 8 is built into the refining box 32 and welded to the inner sides of its front and rear side plates. The refining sorting plate 8 is located 100-200mm outside the material flow inside the refining box 32. The refining sorting plate 8 consists of a vertical plate and a folded plate welded to it at 110-130° below it. The length of the vertical plate is 500-800mm, and the length of the folded plate is 200-400mm.

[0039] A first redirecting roller 9 is located above the outer side of the vertical plate of the sorting plate 8, and a second redirecting roller 10 is located outside the folding plate. A conveyor belt 12 is sequentially fitted around the drive roller 11, the second redirecting roller 10, the sorting plate 8, and the first redirecting roller 9 to form a transmission device 13. The sorting base 30 of the transmission device 13 is bolted to the lower platform 31 of the frame 1. The angle of the bend of the conveyor belt 12 at the first redirecting roller 9 and the second redirecting roller 10 is 110-130°. After passing the first redirecting roller 9 and the second redirecting roller 10, the section of the conveyor belt leading to the drive roller 11 is a horizontal section with a length of 1-1.5m. The conveyor belt 12 is lined with 30mm-80mm of wear-resistant rubber. The fine separation plate 8 is a permanent magnet system, and the surface magnetic field strength is the same as that of the annular magnetic separator 24 in the roughing process. The belt conveying direction at the fine separation plate 8 is downward, consistent with the material flow direction. The fine discharge hopper is flange-connected to the fine box 32. The fine box 32 is located 500-600mm below the conveyor belt. A fine longitudinal vertical partition plate 35 is provided 100-300mm behind the folding plate of the fine separation plate 8. The fine longitudinal vertical partition plate 35 divides the fine box 32 into a fine tailings discharge chute 33 and a fine ore discharge chute 34.

[0040] The scavenging device includes a scavenging feed hopper 14, a scavenging magnetic separation roller 15, and a scavenging discharge hopper. A scavenging drive motor drives the scavenging magnetic separation roller 15. The scavenging base 36 of the scavenging device is bolted to the lower platform 31 of the frame 1. The scavenging box 37 is flange-connected to the scavenging feed hopper 14. The scavenging magnetic separation roller 15 is located outside the material flow inside the scavenging box 37. The scavenging magnetic separation roller 15 has a built-in permanent magnet system 38 with a wrap angle of 110-130 degrees on the side facing the material flow. The magnetic system is fan-shaped and centered on the horizontal axis of the scavenging magnetic separation roller 15. The surface of the scavenging magnetic separation roller 15 is lined with… The wear-resistant rubber is 30mm-80mm thick. The magnetic field strength on the surface of the scavenging magnetic separation roller 15 is 1.2-1.4 times that of the annular magnetic separator 24 in the roughing process. The scavenging discharge hopper is a box structure and is connected to the scavenging box 37 by a flange. The lower section of the scavenging box 37 is provided with a scavenging tailings discharge chute 39 and a scavenging ore discharge chute 40. Inside the scavenging box 37, at a distance of 100-200mm from the material flow below the scavenging magnetic separation roller 15, there is a scavenging longitudinal vertical partition plate 41. The transmission devices of the inner annular rotating motor of the roughing process, the fine selection drive motor and the scavenging drive motor can be frequency-controlled.

[0041] The device of this invention integrates a crusher, a magnetic separation unit including three devices for coarse separation, fine separation and scavenging, and a discharge hopper on the same longitudinal frame from top to bottom, forming an integrated arrangement of crushing and tail-swinging. This creates an integrated crushing-coarse magnetic separation-fine magnetic separation-scavenging magnetic separation machine. This method has a high degree of integration, occupies a small area, and does not require an additional independent tail-swinging belt conveyor and tail-swinging plant, thus reducing equipment investment, plant investment, and equipment operation and maintenance costs.

[0042] This invention employs a coarse magnetic separation method using a rotary inner feeding surface and a fixed annular magnetic separator. This achieves the tailings effect of the crusher's annular circumferential discharge. Magnetic ore adheres to the outer side of the inner ring of the coarse feeding hopper corresponding to the annular magnetic separator. As the inner ring of the feeding hopper rotates, the ore is discharged into the lower ore discharge hopper, moving away from the corresponding area of ​​the annular magnetic separator. The non-magnetic tailings, which cannot be adsorbed onto the inner ring of the feeding hopper, are discharged into the lower tailings discharge hopper. This structural method completes the separation and discharge as the crusher's discharge falls vertically. It is compact, occupies little space, and requires less investment.

[0043] The device of this invention employs a ring-shaped magnetic separator for roughing, which features a large magnetic separation area, a thin material layer, and minimal attenuation of the magnetic field strength as it penetrates the material layer. This facilitates deep separation across the entire thickness of the material layer, achieving a single deep tailings separation during roughing and ensuring a high recovery rate of magnetically separated iron. Furthermore, the magnetic separator's cross-sectional circumferential angle is 300 degrees, ensuring that the majority of the circumference is used for magnetic separation, guaranteeing optimal separation efficiency. The remaining 60-degree non-magnetic separation zone treats both the feed material and the tailings as ore products. This structure avoids the loss of magnetic minerals in the feed material within the non-magnetic separation zone, thus ensuring a high recovery rate of magnetic iron from magnetite and laying the foundation for high profitability for the concentrator.

[0044] The device of the present invention adopts a rotary magnetic separation method for coarse separation, which makes full use of the advantage of the relatively thin vertical two layers of the annular circumferential discharge port of the crusher, so that the material layer is close to the surface of the annular magnetic separator, thereby preventing the situation where some ore cannot be adsorbed due to excessive distance and low field strength, and ensuring the efficient recovery of magnetic iron.

[0045] The device of the present invention includes a coarse-selection feed hopper, annular magnet, and discharge hopper. The feed hopper has an annular structure with a smaller upper opening and a larger lower opening, and a generatrix inclination angle of 75-85 degrees. This structure not only ensures sufficient sorting area, but also ensures sufficient longitudinal rolling and downward movement of materials on the annular surface for sorting distance and sorting time, thus optimizing the sorting effect.

[0046] The field strength of the roughing annular magnetic separator of the present invention is 300-500mT, which is sufficient to ensure the effective recovery of most magnetic ores and further ensures the high recovery rate of magnetic iron in the roughing product.

[0047] The rotating motor on the inner ring surface of the feeding hopper of the present invention is a variable frequency speed control motor, which can adjust the sorting time of the inner ring surface of the feeding hopper in the magnetic separation zone, thereby effectively controlling the sorting effect.

[0048] This invention feeds a coarse concentrate from a roughing stage into a fine concentrate feed hopper. The inclined taper of the coarse concentrate discharge hopper enables the vertical strip-like bundled distribution of the coarse concentrate product during the fine concentrate stage, optimizing the adsorption effect of the fine concentrate. Furthermore, the fine concentrate process achieves a second separation of the coarse concentrate, with the field strength being the same as that of the coarse concentrate. This second separation not only separates the coarse concentrate from the 60-degree non-separation zone during the roughing stage, removing tailings from this portion of the ore, but also removes gangue mixed into the ore during the roughing stage, thereby improving the grade of the tailings concentrate.

[0049] The present invention achieves the adsorption of magnetic ore in the vertical section of the sorting plate by covering the sorting plate with a conveyor belt, and realizes the movement of magnetic ore from the vertical direction to the near horizontal direction through a 110-130° bend. Then, it is transported by the conveyor belt to the rear of the bend plate, and unloaded to the ore side of the discharge section under the action of a single inertia. This method realizes the adsorption-turning-unloading of ore, with a simple and practical structure and low manufacturing cost.

[0050] The device of the present invention employs a sorting plate for sorting, with the entire plate surface being an effective sorting area, resulting in a large sorting area. Furthermore, the material falls under gravity with increasing speed, while the plate surface is relatively high, thereby extending the sorting time, ensuring the recovery of the sorted ore, and optimizing the sorting effect.

[0051] The sorting unit of the device of the present invention achieves the turning of the conveyor belt on the upper and lower sides of the sorting plate through the redirecting rollers A and B. This roller turning method is beneficial for energy saving and reducing conveyor belt wear. The conveyor belt is relatively short, thus eliminating the need for intermediate supports and idlers, reducing manufacturing costs.

[0052] This invention feeds the tailings from a roughing stage into a scavenging stage feed hopper. The inclined constriction of the roughing tailings discharge hopper enables the vertically bundled, strip-like distribution of the roughing fuchsin product during the scavenging stage, optimizing the adsorption effect of the scavenged product. Furthermore, the fine scavenging process achieves secondary separation of the roughing tailings. The electric field strength in the scavenging stage is 1.2-1.4 times that of the roughing stage, allowing for the recovery of some weakly magnetic ore-gangue complexes, as well as the recovery of ore entrained in the tailings during roughing. This improves the recovery rate of the final concentrate from the tailings.

[0053] The magnetic separator roller of the present invention is lined with 30mm-80mm of wear-resistant rubber, which effectively ensures the service life of the magnetic separator roller, reduces the maintenance frequency of the magnetic separator roller, and improves the equipment operating rate.

[0054] The transmission devices for the selection and sweeping processes in this invention can be frequency-controlled to adjust the speed of the selection conveyor belt and the sweeping roller, thereby adjusting the inertial kinetic energy of the adsorbed magnetic ore during unloading, changing the unloading trajectory of the magnetic ore, and thus adjusting the proportion of material on both sides of the respective separator plates to maximize the recovery rate of magnetic iron in the dry-concentrated concentrate.

Claims

1. A circumferential cloth tail-throwing device, characterized in that, The application relates to a crushing device, a tailing throwing device and a rack (1), wherein the crushing device and the tailing throwing device are arranged on the rack (1), and the crushing device is arranged at the upper end of the tailing throwing device. The crushing device comprises a main shell (2), a moving cone (3), a transmission part, a base (4), the base (4) is bolted to the upper layer platform (5) of the rack (1), the main shell (2) is connected with the base (4), the moving cone (3) is connected with the transmission part, and the moving cone (3) and the transmission part are arranged in the main shell (2); The tailing throwing device comprises a rough selection device (6), a fine selection device and a sweeping selection device, the rough selection device (6) is connected with the fine selection device and the sweeping selection device respectively; The rough selection device (6) comprises a rough selection feeding hopper, a rough magnetic selection device and a rough selection discharge hopper, the rough selection feeding hopper is arranged below the annular circumferential discharge port of the crushing device, the rough selection feeding hopper is an annular cavity with a small upper opening, a large lower opening and a 75-85 degree wire inclination angle, which is formed by a fixed outer ring surface (16), a rotating inner ring surface (17) and an inner ring top plate (18), the upper opening of the fixed outer ring surface (16) is located at the outer side of the annular circumferential discharge port of the crushing device by 50-100 mm, the upper opening of the rotating inner ring surface (17) is located at the inner side of the annular circumferential discharge port of the crushing device by 50-100 mm, the fixed outer ring surface (16) is bolted to the middle layer platform (20) of the rack (1) through the rough selection base (19) at the outer side of the fixed outer ring surface (16), The rotating inner ring surface (17) is of a rotating structure, one end of a rotating central shaft (21) is bolted to below the inner ring top plate (18), the top of the rotating central shaft (21) is movably connected with the upper layer platform (5) after penetrating through the inner ring top plate (18), the other end of the rotating central shaft (21) is connected with a variable frequency rotating motor (22) after penetrating through the middle layer platform (20), the rotating central shaft (21) is movably connected with a bearing support (23), the bearing support (23) is bolted to the middle layer platform (20), the rough magnetic selection device is also of an annular magnetic selection body (24) with a small upper opening and a large lower opening, the annular magnetic selection body (24) is concentrically arranged inside the rough selection feeding hopper, the upper end of the annular magnetic selection body (24) is located at a distance of 100-150 mm from the lower end of the inner ring top plate, the outer end is located at a distance of 100-200 mm from the inner end of the rough selection feeding hopper, the wire inclination angle is consistent with that of the rough selection feeding hopper, the cross section of the annular magnetic selection body (24) has a circumferential angle of 300 degrees, the remaining 60 degrees of the annular body is vacant, the material is a permanent magnetic material, the outer surface field strength is 300-500 mT, and the annular magnetic selection body (24) is bolted to the middle layer platform (20) of the rack (1) through a support (25); The rough selection discharge hopper is arranged below the rough selection feeding hopper and comprises a rough ore discharge hopper (26) and a rough tailing discharge hopper (27). The concentrating device comprises a concentrating feed hopper (7), a concentrating sorting plate (8), a first redirecting roller (9), a second redirecting roller (10), a transmission roller (11), a conveyor belt (12), a transmission device (13) and a concentrating discharge hopper, the transmission device (13) comprises a concentrating transmission motor, the concentrating transmission motor drives the transmission roller (11), the concentrating feed hopper (7) is a box structure, which is arranged at the lower part of the outlet of the roughing ore discharge hopper, the concentrating feed hopper (7) is connected with the concentrating box (32) through a flange, the concentrating sorting plate (8) is built-in the concentrating box (32) and is welded with the inner sides of the front and rear side plates, the concentrating sorting plate (8) is located at the outer side of the material flow in the concentrating box (32) by 100-200 mm, the concentrating sorting plate (8) is composed of a vertical plate and a bent plate welded with the vertical plate at 110-130° below the vertical plate, the length of the vertical plate is 500-800 mm, and the length of the bent plate is 200-400 mm; The outer side of the vertical plate of the concentrating sorting plate (8) is provided with the first redirecting roller (9), the outer side of the bent plate is provided with the second redirecting roller (10), and the conveyor belt (12) is sequentially sleeved on the transmission roller (11), the second redirecting roller (10), the concentrating sorting plate (8) and the first redirecting roller (9) to form transmission, the concentrating base (30) of the transmission device (13) is bolted with the lower platform (31) of the rack (1), the angle of the arc of the conveyor belt (12) at the first redirecting roller (9) and the second redirecting roller (10) is 110-130°, and the concentrating discharge hopper is connected with the concentrating box (32) through a flange.

2. The circumferential fabric tail-dragging device according to claim 1, wherein The roughing tailing discharge hopper (27) is located below the tailing discharge port (28) formed by the rotating inner ring surface (17) corresponding to the 300-degree annular magnetic sorting body and the fixed outer ring surface (16) of the roughing feed hopper, the roughing ore discharge hopper (26) is located below the ore discharge port (29) formed by the rotating inner ring surface (17) corresponding to the 60-degree non-annular magnetic sorting body and the fixed outer ring surface (16) of the roughing feed hopper, the roughing ore discharge hopper (26) and the roughing tailing discharge hopper (27) are both the collecting hopper with the annular upper port and the long strip square lower port, the surface of the conveyor belt (12) is lined with 30-80 mm wear-resistant rubber, the concentrating sorting plate (8) is a permanent magnetic system, the surface magnetic field strength is consistent with the magnetic field strength of the annular magnetic sorting body (24) of the roughing device, and the conveying direction of the conveyor belt at the concentrating sorting plate (8) is consistent with the direction of the material flow and downward conveying.

3. The circumferential fabric tail-dragging device according to claim 1, wherein The sweeping and selecting device comprises a sweeping and selecting feed hopper (14), a sweeping and selecting magnetic roller (15) and a sweeping and selecting discharge hopper, a sweeping and selecting transmission motor drives the sweeping and selecting magnetic roller (15), a sweeping and selecting base (36) of the sweeping and selecting device is bolted to the lower platform (31) of the frame (1), a sweeping and selecting box (37) is connected with the sweeping and selecting feed hopper (14) through a flange, the sweeping and selecting magnetic roller (15) is located outside the material flow in the sweeping and selecting box (37), a permanent magnet magnetic system (38) with an included angle of 110-130 degrees is arranged in the side of the sweeping and selecting magnetic roller (15) facing the material flow, the permanent magnet magnetic system (38) is a fan shape and is arranged with the horizontal axis of the sweeping and selecting magnetic roller (15) as the center line, the surface of the sweeping and selecting magnetic roller (15) is lined with 30mm-80mm wear-resistant rubber, the surface magnetic field strength of the sweeping and selecting magnetic roller (15) is 1.2-1.4 times that of the roughing device annular magnetic selection body (24), the sweeping and selecting discharge hopper is a box structure, and the sweeping and selecting discharge hopper is connected with the sweeping and selecting box (37) through a flange.

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