Low-grade iron ore beneficiation method and device

Abstract

The invention relates to the technical field of ore beneficiation, and discloses a low-grade iron ore beneficiation method and device.The low-grade iron ore beneficiation device comprises a supporting frame, a conveying motor is fixedly connected to the surface of the supporting frame, a rotating shaft is fixedly connected to the output end of the conveying motor, a conveying belt is in transmission connection to the surface of the rotating shaft, and a cleaning pump is fixedly connected to the surface of the supporting frame; the top of the support frame is fixedly connected with a filter cartridge; according to the ore dressing device, firstly, ore needing to be subjected to ore dressing is poured into a filter cartridge, then a driving motor is started to drive a two-way threaded rod to rotate, when the two-way threaded rod rotates, a vibration roller is driven to rotate, and when the vibration roller rotates, friction is conducted between the vibration roller and the surface of a vibration plate to generate vibration; when the two-way threaded rod rotates, the threaded ring moves towards the mutual approaching direction, when the threaded ring moves, the sliding plate is pushed to move towards the mutual approaching direction on the surface of the sliding rail, and when the sliding plate moves, the driven frame is driven to move towards the mutual approaching direction.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing equipment, and in particular to a low-grade iron ore dressing method and device. Background Art

[0002] With the continuous decline of the international economy and the continuous adjustment of the domestic economic situation, the demand for steel in my country's market has begun to shrink. The country has continuously increased its control over steel production capacity, and the price of imported ore has fallen. The efficiency of many domestic mining companies has declined significantly, and they have reached the brink of small profits or even losses. At the same time, environmental protection requirements have become increasingly stringent. In order to seek new paths for enterprise development and survival, domestic mining companies have vigorously carried out innovation-driven development and taken the path of developing mining through science and technology.

[0003] In the prior art, ore is usually beneficiated by filtering. The filtered ore falls into a conveying device and is transported to the next process. However, when it falls on the surface of the conveying device, the ore will fall by inertia or elasticity. The ore will fall loosely and may fall to the ground during transportation. At this time, the ore needs to be picked up and re-benefitted, which reduces the efficiency of beneficiation and increases labor. Summary of the invention

[0004] The object of the present invention is to provide a low-grade iron ore beneficiation method and device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a low-grade iron ore beneficiation method and device, comprising a support frame, a transmission motor is fixedly connected to the surface of the support frame, a rotating shaft is fixedly connected to the output end of the transmission motor, a conveyor belt is transmission-connected to the surface of the rotating shaft, a cleaning pump is fixedly connected to the surface of the support frame, a filter cartridge is fixedly connected to the top of the support frame, and further comprising: The vibration mechanism includes a driving motor, an output end of the driving motor is fixedly connected to a bidirectional threaded rod, and an end of the bidirectional threaded rod away from the driving motor is fixedly connected to a vibration roller; The positioning mechanism comprises a positioning plate, and the inner wall of the positioning plate is slidably connected with a contraction plate; The centralizing mechanism comprises an elastic plate, the surface of the elastic plate is rotatably connected with a lower pressing frame, and one end of the lower pressing frame away from the elastic plate is rotatably connected with a sealing door.

[0006] Furthermore, there are two cleaning pumps, which are symmetrically arranged with the conveyor belt as the center, and the rotating shaft completely penetrates the surface of the support frame and is fixedly connected to the output end of the conveying motor.

[0007] Furthermore, the vibration mechanism includes a vibration plate, a slide rail is fixedly connected to the surface of the vibration plate, a slide rail is slidably connected to the surface of the slide plate, a passive frame is fixedly connected to the surface of the slide plate, a contact ring is fixedly connected to the end of the passive frame away from the slide plate, a vibration elastic rod is fixedly connected to the surface of the vibration plate, and a threaded ring is threadedly connected to the surface of the bidirectional threaded rod.

[0008] Furthermore, both ends of the vibration plate are fixedly connected to the surface of the support frame, the surface of the vibration roller contacts the surface of the vibration plate, and the end of the threaded ring away from the bidirectional threaded rod is fixedly connected to the surface of the skateboard, driving the bottom of the motor to be fixedly connected to the surface of the support frame.

[0009] Furthermore, the positioning mechanism includes a connecting plate, the surface of the connecting plate is slidably connected to a sliding frame, the surface of the sliding frame is rotatably connected to an extrusion rod, the end of the sliding frame is fixedly connected to a limiting elastic rod, the surface of the positioning plate is fixedly connected to the elastic frame, the surface of the elastic frame is fixedly connected to a push rod, and the end of the sliding frame away from the limiting elastic rod is fixedly connected to a driven frame.

[0010] Furthermore, one end of the extrusion rod away from the sliding frame is rotatably connected to the surface of the positioning plate, one end of the push rod away from the elastic frame is fixedly connected to the surface of the positioning plate, and one end of the driven frame away from the sliding frame is fixedly connected to the surface of the passive frame.

[0011] Furthermore, the concentrating mechanism includes a concentrating frame, the inner wall of the concentrating frame is fixedly connected with a connecting column, the surface of the connecting column is provided with a force-bearing groove, the inner wall of the force-bearing groove is slidably connected with a slider, the end of the slider is fixedly connected with an extrusion elastic rod, the surface of the slider is fixedly connected with a pushing material shrinkage plate, the surface of the pushing material shrinkage plate is rotatably connected with a storage plate, the end of the storage plate is rotatably connected with the concentrating plate away from the pushing material shrinkage plate, and the top of the concentrating plate is fixedly connected with a right-angle frame.

[0012] Furthermore, one end of the right-angle frame away from the concentrating plate is fixedly connected to the surface of the sliding frame, the bottom of the elastic plate is fixedly connected to the top of the concentrating plate, a water flow hole is opened on the surface of the concentrating frame, the cleaning pump completely penetrates the surface of the concentrating frame and extends to the interior, and the surface of the sealing door is rotatably connected to the inner wall of the concentrating frame.

[0013] Furthermore, a method for beneficiating low-grade iron ore comprises the following steps: S1: First, pour the ore to be beneficiated into the filter cylinder, and then start the motor to drive the bidirectional threaded rod to rotate. When the bidirectional threaded rod rotates, it will drive the bidirectional threaded rod to rotate; S2: When the vibration roller rotates, it rubs against the surface of the vibration plate to generate vibration, and when the bidirectional threaded rod rotates, the threaded rings move toward each other; S3: When the passive frame moves, it pushes the driven frame to move in a direction close to each other, and when the driven frame moves, it pushes the sliding frame to move in a direction close to each other on the surface of the connecting plate; S4: When the ore falls on the surface of the conveyor belt, the conveyor motor is started to drive the rotating shaft to rotate. When the rotating shaft rotates, the conveyor belt is driven to rotate and the ore is transported to the inside of the concentration frame.

[0014] The present invention has the following beneficial effects: The present invention sets a vibration mechanism. First, the ore to be beneficiated is poured into the interior of the filter cylinder. Then, the motor is started to drive the bidirectional threaded rod to rotate. When the bidirectional threaded rod rotates, it drives the vibration roller to rotate. When the vibration roller rotates, it rubs against the surface of the vibration plate to generate vibration. When the bidirectional threaded rod rotates, the threaded rings are moved in directions approaching each other. When the threaded rings move, they push the slide plate to move in directions approaching each other on the surface of the slide rail. When the slide plate moves, it drives the passive frame to move in directions approaching each other. When the passive frame moves, it drives the contact ring to move in directions approaching each other and fits with the surface of the filter cylinder, thereby effectively vibrating the filter cylinder and improving the filtering efficiency of the filter cylinder.

[0015] The present invention provides a positioning mechanism. When the passive frame moves, it will push the driven frame to move in the direction of approaching each other. When the driven frame moves, it will push the sliding frame to move in the direction of approaching each other on the surface of the connecting plate. When the sliding frame moves, it will push the extrusion rod to move in the direction of approaching each other. When the extrusion rod moves, it will push the positioning plate to move in the direction of approaching each other. When the positioning plate moves, it will drive the contraction plate to contract. When the sliding frame moves, it will push the limiting elastic rod to contract. When the positioning plate moves, it will squeeze the elastic frame. When the elastic frame is squeezed, the middle part will bend. When the middle part of the elastic frame is bent, it will push the push rod to move in the direction of approaching each other. When the push rod moves, it will push the positioning plate to move in the direction of approaching each other, so as to effectively position the ore that falls after filtration and prevent the ore from falling loosely due to inertia or elasticity.

[0016] The present invention sets a centralizing mechanism. When the ore falls on the surface of the conveyor belt, the conveying motor is started to drive the rotating shaft to rotate. When the rotating shaft rotates, the conveyor belt is driven to rotate and the ore is transported to the inside of the centralizing frame. Then the cleaning pump is started to clean the ore. The cleaned water pushes the water hole to flow out. When the sliding frame moves, it drives the right-angle frame to move in a direction close to each other. When the right-angle frame moves, it drives the centralizing plate to move in a direction close to each other. When the centralizing plate moves, it pushes the receiving plate to move in a direction close to each other. When the receiving plate moves, it pushes the material pusher to collect the material. The shrinking plate moves forward, and when the push-material shrinking plate moves, it will drive the slider to slide forward on the inner wall of the force groove and squeeze the extrusion elastic rod. When the concentrating plate moves, it will push the push-material shrinking plate to shrink. When the concentrating plate moves, it will squeeze the elastic plate. When the elastic plate is squeezed, the middle part bends. When the middle part of the elastic plate bends, it will push the lower pressure frame to move downward. When the lower pressure frame moves downward, it will push the sealing door to move downward and expand to both sides, effectively cleaning the fallen ore, and then collecting it in a centralized manner through the cooperation of the concentrating plate and the push-material shrinking plate.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the vibration mechanism of the present invention; Figure 4 It is a schematic diagram of the overall structure of the positioning mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the extrusion rod of the present invention; Figure 6 It is a schematic diagram of the overall structure of the centralized mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the lower pressing frame of the present invention; Figure 8 This is a schematic diagram of the structure of the extruded elastic rod of the present invention; Fig. 9 The invention discloses a method for using a low-grade iron ore beneficiation method device.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, support frame; 2, transmission motor; 3, rotating shaft; 4, conveyor belt; 5, cleaning pump; 6, filter cartridge; 10, vibration mechanism; 11, vibration plate; 12, slide rail; 13, slide plate; 14, passive frame; 15, contact ring; 16, vibration elastic rod; 17, drive motor; 18, two-way threaded rod; 19, vibration roller; 20, threaded ring; 30, positioning mechanism; 31, connecting plate; 32, sliding frame; 33, extrusion rod; 34, positioning plate; 35, contraction plate; 36, limit elastic rod; 37, elastic frame; 38, push rod; 39, driven frame; 50, centralizing mechanism; 51, centralizing frame; 52, connecting column; 53, slide block; 54, extrusion elastic rod; 55, push material contraction plate; 56, storage plate; 57, centralizing plate; 58, right-angle frame; 59, elastic plate; 60, lower pressure frame; 61, sealing door. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 - Fig. 9 As shown, the present invention is a low-grade iron ore beneficiation method and device, including a support frame 1, a transmission motor 2 is fixedly connected to the surface of the support frame 1, a rotating shaft 3 is fixedly connected to the output end of the transmission motor 2, and a conveyor belt 4 is drivingly connected to the surface of the rotating shaft 3. When the rotating shaft 3 rotates, the conveyor belt 4 is driven to rotate. When the ore falls on the surface of the conveyor belt 4, the transmission motor 2 is started to drive the rotating shaft 3 to rotate. A cleaning pump 5 is fixedly connected to the surface of the support frame 1, and then the cleaning pump 5 is started to clean the ore. The cleaned water will push the water flow hole to flow out. The top of the support frame 1 is fixedly connected to a filter cartridge 6. First, the ore to be beneficiated is poured into the inside of the filter cartridge 6. It also includes; The vibration mechanism 10 includes a driving motor 17, and then the driving motor 17 is started to drive the bidirectional threaded rod 18 to rotate, the output end of the driving motor 17 is fixedly connected to the bidirectional threaded rod 18, and the end of the bidirectional threaded rod 18 away from the driving motor 17 is fixedly connected to the vibration roller 19, and when the bidirectional threaded rod 18 rotates, the vibration roller 19 is driven to rotate; The positioning mechanism 30 includes a positioning plate 34. When the extrusion rod 33 moves, the positioning plate 34 is pushed to move in a direction close to each other. The inner wall of the positioning plate 34 is slidably connected with a contraction plate 35. When the positioning plate 34 moves, the contraction plate 35 is driven to contract. The concentrating mechanism 50 includes an elastic plate 59. When the concentrating plate 57 moves, it squeezes the elastic plate 59. When the elastic plate 59 is squeezed, the middle part bends. The surface of the elastic plate 59 is rotatably connected to a lower pressure frame 60. When the middle part of the elastic plate 59 bends, it pushes the lower pressure frame 60 to move downward. One end of the lower pressure frame 60 away from the elastic plate 59 is rotatably connected to a sealing door 61. When the lower pressure frame 60 moves downward, it pushes the sealing door 61 to move downward and expand to both sides.

[0023] There are two cleaning pumps 5 , which are symmetrically arranged around the conveyor belt 4 . The rotating shaft 3 completely penetrates the surface of the support frame 1 and is fixedly connected to the output end of the conveying motor 2 .

[0024] The vibration mechanism 10 includes a vibration plate 11. When the vibration roller 19 rotates, it will rub against the surface of the vibration plate 11 to generate vibration. The surface of the vibration plate 11 is fixedly connected to a slide rail 12. The surface of the slide rail 12 is slidably connected to a slide plate 13. The surface of the slide plate 13 is fixedly connected to a passive frame 14. When the slide plate 13 moves, it will drive the passive frame 14 to move in a direction close to each other. When the threaded ring 20 moves, it will push the slide plate 13 to move on the surface of the slide rail 12 in a direction close to each other. The end of the passive frame 14 away from the slide plate 13 is fixedly connected to a contact ring 15. When the passive frame 14 moves, it will drive the contact ring 15 to move in a direction close to each other and fit with the surface of the filter cartridge 6. The surface of the vibration plate 11 is fixedly connected to a vibration elastic rod 16. The surface of the bidirectional threaded rod 18 is threadedly connected to a threaded ring 20, which effectively vibrates the filter cartridge 6 to improve the filtering efficiency of the filter cartridge 6.

[0025] Both ends of the vibration plate 11 are fixedly connected to the surface of the support frame 1, the surface of the vibration roller 19 contacts the surface of the vibration plate 11, and the end of the threaded ring 20 away from the bidirectional threaded rod 18 is fixedly connected to the surface of the slide plate 13. When the bidirectional threaded rod 18 rotates, the threaded ring 20 will move in a direction approaching each other, driving the bottom of the motor 17 to be fixedly connected to the surface of the support frame 1.

[0026] The positioning mechanism 30 includes a connecting plate 31, and a sliding frame 32 is slidably connected to the surface of the connecting plate 31. When the driven frame 39 moves, the sliding frame 32 is pushed to move in a direction close to each other on the surface of the connecting plate 31. The surface of the sliding frame 32 is rotatably connected to the extrusion rod 33. The end of the sliding frame 32 is fixedly connected to the limiting elastic rod 36. When the sliding frame 32 moves, the limiting elastic rod 36 is pushed to shrink. The surface of the positioning plate 34 is fixedly connected to the elastic frame 37. When the push rod 38 moves, the positioning plate 34 is pushed to move in a direction close to each other. The surface of the elastic frame 37 is fixedly connected to the push rod 38. When the middle part of the elastic frame 37 is bent, the push rod 38 is pushed to move in a direction close to each other. The end of the sliding frame 32 away from the limiting elastic rod 36 is fixedly connected to the driven frame 39, which effectively positions the ore that falls after filtration and prevents the ore from falling loose due to inertia or elasticity.

[0027] One end of the extrusion rod 33 away from the sliding frame 32 is rotatably connected to the surface of the positioning plate 34. When the extrusion rod 33 moves, it pushes the positioning plate 34 to move in a direction close to each other. When the sliding frame 32 moves, it pushes the extrusion rod 33 to move in a direction close to each other. One end of the push rod 38 away from the elastic frame 37 is fixedly connected to the surface of the positioning plate 34. When the positioning plate 34 moves, it squeezes the elastic frame 37. When the elastic frame 37 is squeezed, the middle part will bend. The end of the driven frame 39 away from the sliding frame 32 is fixedly connected to the surface of the passive frame 14. When the passive frame 14 moves, it pushes the driven frame 39 to move in a direction close to each other.

[0028] The concentrating mechanism 50 comprises a concentrating frame 51, the inner wall of which is fixedly connected with a connecting column 52, the surface of which is provided with a stress-bearing groove, the inner wall of which is slidably connected with a slider 53, when the pushing and shrinking plate 55 moves, the slider 53 is driven to slide forward on the inner wall of the stress-bearing groove, the end of the slider 53 is fixedly connected with an extrusion elastic rod 54, and the extrusion elastic rod 54 is extruded, the surface of the slider 53 is fixedly connected with a pushing and shrinking plate 55, when the receiving plate 56 moves, the pushing and shrinking plate 55 is pushed to move forward, the surface of the pushing and shrinking plate 55 is rotatably connected with the receiving plate 56, when the concentrating plate 57 moves, the receiving plate 56 is pushed to move in a direction approaching each other, the end of the receiving plate 56 away from the pushing and shrinking plate 55 is rotatably connected with the concentrating plate 57, the top of the concentrating plate 57 is fixedly connected with a right-angle frame 58, the dropped ore is effectively cleaned, and then the ore is collected and stored in a concentrated manner through the cooperation between the concentrating plate 57 and the pushing and shrinking plate 55.

[0029] One end of the right-angle frame 58 away from the concentrating plate 57 is fixedly connected to the surface of the sliding frame 32. When the concentrating plate 57 moves, it will push the push-pull shrink plate 55 to shrink. When the sliding frame 32 moves, it will drive the right-angle frame 58 to move in the direction of approaching each other. The bottom of the elastic plate 59 is fixedly connected to the top of the concentrating plate 57. A water flow hole is opened on the surface of the concentrating frame 51. The cleaning pump 5 completely penetrates the surface of the concentrating frame 51 and extends to the inside. The surface of the sealing door 61 is rotatably connected to the inner wall of the concentrating frame 51.

[0030] A method for beneficiating low-grade iron ore comprises the following steps: S1: First, pour the ore to be processed into the filter cylinder 6, and then start the motor 17 to drive the bidirectional threaded rod 18 to rotate. When the bidirectional threaded rod 18 rotates, it will drive the bidirectional threaded rod 18 to rotate; S2: When the vibration roller 19 rotates, it rubs against the surface of the vibration plate 11 to generate vibration, and when the bidirectional threaded rod 18 rotates, the threaded ring 20 moves toward each other; S3: When the passive frame 14 moves, it pushes the driven frame 39 to move in a direction close to each other, and when the driven frame 39 moves, it pushes the sliding frame 32 to move in a direction close to each other on the surface of the connecting plate 31; S4: When the ore falls on the surface of the conveyor belt 4 , the conveyor motor 2 is started to drive the rotating shaft 3 to rotate. When the rotating shaft 3 rotates, the conveyor belt 4 is driven to rotate and the ore is transported to the inside of the concentration frame 51 .

[0031] When in use, first pour the ore to be beneficiated into the interior of the filter cylinder 6, then start the driving motor 17 to drive the bidirectional threaded rod 18 to rotate, when the bidirectional threaded rod 18 rotates, it will drive the vibration roller 19 to rotate, when the vibration roller 19 rotates, it will rub against the surface of the vibration plate 11 to generate vibration, when the bidirectional threaded rod 18 rotates, it will make the threaded ring 20 move in a direction close to each other, when the threaded ring 20 moves, it will push the slide plate 13 to move in a direction close to each other on the surface of the slide rail 12, when the slide plate 13 moves, it will drive the passive frame 14 to move in a direction close to each other, when the passive frame 14 moves, it will drive the contact ring 15 to move in a direction close to each other and The surface of the filter cartridge 6 is fitted, and when the passive frame 14 moves, it pushes the driven frame 39 to move in a direction close to each other. When the driven frame 39 moves, it pushes the sliding frame 32 to move in a direction close to each other on the surface of the connecting plate 31. When the sliding frame 32 moves, it pushes the extrusion rod 33 to move in a direction close to each other. When the extrusion rod 33 moves, it pushes the positioning plate 34 to move in a direction close to each other. When the positioning plate 34 moves, it drives the contraction plate 35 to contract. When the sliding frame 32 moves, it pushes the limit elastic rod 36 to contract. When the positioning plate 34 moves, it squeezes the elastic frame 37. When the elastic frame 37 is squeezed, the middle part When the middle part of the elastic frame 37 bends, it will push the push rod 38 to move in the direction of approaching each other. When the push rod 38 moves, it will push the positioning plate 34 to move in the direction of approaching each other. When the ore falls on the surface of the conveyor belt 4, the conveying motor 2 is started to drive the rotating shaft 3 to rotate. When the rotating shaft 3 rotates, the conveyor belt 4 is driven to rotate and the ore is transported to the inside of the centralizing frame 51. Then the cleaning pump 5 is started to clean the ore. The cleaned water will push the water flow hole to flow out. When the sliding frame 32 moves, it will drive the right-angle frame 58 to move in the direction of approaching each other. When the right-angle frame 58 moves, it will drive the centralizing plate 57 to move in the direction of approaching each other. When the concentrating plate 57 moves, it will push the receiving plate 56 to move towards each other. When the receiving plate 56 moves, it will push the pushing and shrinking plate 55 to move forward. When the pushing and shrinking plate 55 moves, it will drive the slider 53 to slide forward on the inner wall of the force groove and squeeze the extrusion elastic rod 54. When the concentrating plate 57 moves, it will push the pushing and shrinking plate 55 to shrink. When the concentrating plate 57 moves, it will squeeze the elastic plate 59. When the elastic plate 59 is squeezed, the middle part will bend. When the middle part of the elastic plate 59 bends, it will push the lower pressing frame 60 to move downward. When the lower pressing frame 60 moves downward, it will push the sealing door 61 to move downward and expand to both sides.

[0032] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-grade iron ore beneficiation device, comprising a support frame (1), a conveying motor (2) being fixedly connected to the surface of the support frame (1), a rotating shaft (3) being fixedly connected to the output end of the conveying motor (2), a conveying belt (4) being drivingly connected to the surface of the rotating shaft (3), a cleaning pump (5) being fixedly connected to the surface of the support frame (1), and a filter cartridge (6) being fixedly connected to the top of the support frame (1), characterized in that: Also includes; A vibration mechanism (10), the vibration mechanism (10) comprising a driving motor (17), the output end of the driving motor (17) being fixedly connected to a bidirectional threaded rod (18), and one end of the bidirectional threaded rod (18) away from the driving motor (17) being fixedly connected to a vibration roller (19); A positioning mechanism (30), the positioning mechanism (30) comprising a positioning plate (34), the inner wall of the positioning plate (34) being slidably connected to a retractable plate (35); A centralizing mechanism (50) comprises an elastic plate (59), a surface of the elastic plate (59) being rotatably connected to a lower pressing frame (60), and an end of the lower pressing frame (60) away from the elastic plate (59) being rotatably connected to a sealing door (61).

2. A low-grade iron ore beneficiation device according to claim 1, characterized in that: The number of the cleaning pumps (5) is two, and the two cleaning pumps (5) are symmetrically arranged with the conveyor belt (4) as the center. The rotating shaft (3) completely penetrates the surface of the support frame (1) and is fixedly connected to the output end of the conveying motor (2).

3. A low-grade iron ore beneficiation device according to claim 2, characterized in that: The vibration mechanism (10) comprises a vibration plate (11), a slide rail (12) being fixedly connected to the surface of the vibration plate (11), a slide rail (12) being slidably connected to the surface of the slide rail (12), a passive frame (14) being fixedly connected to the surface of the slide rail (12), a contact ring (15) being fixedly connected to the end of the passive frame (14) away from the slide rail (13), a vibration elastic rod (16) being fixedly connected to the surface of the vibration plate (11), and a threaded ring (20) being threadedly connected to the surface of the bidirectional threaded rod (18).

4. A low-grade iron ore beneficiation device according to claim 3, characterized in that: Both ends of the vibration plate (11) are fixedly connected to the surface of the support frame (1), the surface of the vibration roller (19) contacts the surface of the vibration plate (11), one end of the threaded ring (20) away from the bidirectional threaded rod (18) is fixedly connected to the surface of the slide plate (13), and the bottom of the driving motor (17) is fixedly connected to the surface of the support frame (1).

5. A low-grade iron ore beneficiation device according to claim 4, characterized in that: The positioning mechanism (30) comprises a connecting plate (31), a surface of the connecting plate (31) being slidably connected to a sliding frame (32), a surface of the sliding frame (32) being rotatably connected to an extrusion rod (33), an end of the sliding frame (32) being fixedly connected to a limiting elastic rod (36), a surface of the positioning plate (34) being fixedly connected to an elastic frame (37), a surface of the elastic frame (37) being fixedly connected to a push rod (38), and an end of the sliding frame (32) away from the limiting elastic rod (36) being fixedly connected to a driven frame (39).

6. A low-grade iron ore beneficiation device according to claim 5, characterized in that: One end of the extrusion rod (33) away from the sliding frame (32) is rotatably connected to the surface of the positioning plate (34), one end of the push rod (38) away from the elastic frame (37) is fixedly connected to the surface of the positioning plate (34), and one end of the driven frame (39) away from the sliding frame (32) is fixedly connected to the surface of the passive frame (14).

7. A low-grade iron ore beneficiation device according to claim 6, characterized in that: The centralizing mechanism (50) comprises a centralizing frame (51), the inner wall of the centralizing frame (51) is fixedly connected to a connecting column (52), the surface of the connecting column (52) is provided with a force-bearing groove, the inner wall of the force-bearing groove is slidably connected to a slider (53), the end of the slider (53) is fixedly connected to an extrusion elastic rod (54), the surface of the slider (53) is fixedly connected to a material pushing and shrinking plate (55), the surface of the material pushing and shrinking plate (55) is rotatably connected to a storage plate (56), one end of the storage plate (56) away from the material pushing and shrinking plate (55) is rotatably connected to a centralizing plate (57), and the top of the centralizing plate (57) is fixedly connected to a right-angle frame (58).

8. A low-grade iron ore beneficiation device according to claim 7, characterized in that: One end of the right-angle frame (58) away from the centralizing plate (57) is fixedly connected to the surface of the sliding frame (32); the bottom of the elastic plate (59) is fixedly connected to the top of the centralizing plate (57); a water flow hole is provided on the surface of the centralizing frame (51); the cleaning pump (5) completely penetrates the surface of the centralizing frame (51) and extends to the inside; and the surface of the sealing door (61) is rotatably connected to the inner wall of the centralizing frame (51).

9. A method for beneficiating low-grade iron ore according to claim 8, characterized in that: The following steps are involved: S1: First, pour the ore to be processed into the filter cartridge (6), then start the motor (17) to drive the bidirectional threaded rod (18) to rotate. When the bidirectional threaded rod (18) rotates, it drives the bidirectional threaded rod (18) to rotate; S2: When the vibration roller (19) rotates, it rubs against the surface of the vibration plate (11) to generate vibration, and when the bidirectional threaded rod (18) rotates, the threaded rings (20) move in a direction toward each other; S3: When the passive frame (14) moves, it pushes the driven frame (39) to move in a direction approaching each other, and when the driven frame (39) moves, it pushes the sliding frame (32) to move in a direction approaching each other on the surface of the connecting plate (31); S4: When the ore falls onto the surface of the conveyor belt (4), the conveyor motor (2) is started to drive the rotating shaft (3) to rotate. When the rotating shaft (3) rotates, the conveyor belt (4) is driven to rotate and the ore is transported to the inside of the centralizing frame (51).

Images