Dolomite ore fines screening device and screening method

Abstract

The application belongs to the technical field of dolomite ore fine material processing, in particular to a dolomite ore fine material screening device and method, which comprises a shell, a first feeding groove is formed in the top surface of the shell, a first discharging groove is formed in the side wall of the shell, and a second discharging groove is formed in the bottom surface of the shell; an inclined fixed block is arranged in the shell, a first screening plate is fixedly connected to one side of the fixed block close to the first discharging groove, and a plurality of first screening holes are formed in the first screening plate; the output end of an electric telescopic rod is used to push a second screening plate by starting the electric telescopic rod, at this time, the positions of the first screening holes and the second screening holes are dislocated, the second screening plate blocks the first screening holes, the aperture of the first screening holes is adjusted, after the aperture of the first screening holes is adjusted to a suitable position, the electric telescopic rod is turned off, and the dolomite ore can be screened again to further screen smaller dolomite ore.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dolomite ore fines processing, and particularly relates to a dolomite ore fines screening device and a screening method. BACKGROUND

[0002] After being crushed, dolomite ore forms a mixture of materials with different particle sizes. In order to meet the strict requirements of downstream users or specific production processes, the mixture of materials must be separated and classified according to particle size through fine classification. This process is usually realized by using screening equipment to divide the materials into multiple specifications such as 0-5mm, 5-10mm, 10-20mm, etc.

[0003] In the current screening process of the mixture of materials, a series of screens with fixed mesh sizes are generally required to accurately separate materials of different particle sizes. These screens usually need to be screened in batches one after another, which is a complicated and time-consuming process. Since a single screening device cannot integrate multiple aperture specifications, it cannot realize simultaneous and continuous multi-stage screening operation. This inherent operation mode not only significantly reduces the screening efficiency and increases the equipment investment and space occupation, but also exposes obvious limitations when processing large batches of materials with a wide range of particle sizes, thereby restricting the automation and overall efficiency of the production process. Therefore, the present application provides a dolomite ore fines screening device and a screening method. SUMMARY

[0004] In order to make up for the shortcomings of the prior art and solve at least one technical problem raised in the background art.

[0005] The technical solution adopted by the application to solve its technical problems is: the dolomite ore fines screening device comprises a shell, a first feeding slot is formed in the top surface of the shell, a first discharge slot is formed in the side wall of the shell, and a second discharge slot is formed in the bottom surface of the shell; an inclined fixed block is arranged in the shell, a first screening plate is fixedly connected to the side of the fixed block close to the first discharge slot, and a plurality of first screening holes are formed in the first screening plate; a sliding slot is formed in the side of the shell close to the first screening plate, a second screening plate is arranged in the sliding slot, second screening holes corresponding to the first screening holes are formed in the second screening plate, and the top surface of the second screening plate is attached to the first screening plate; an electric telescopic rod is fixedly connected in the sliding slot, the output end of the electric telescopic rod is fixedly connected to the second screening plate, a rock ore collecting assembly is arranged on the side of the shell close to the second discharge slot, and a shaking assembly is arranged in the shell to shake the first screening plate and the second screening plate.

[0006] The second screening plate is internally hollow, and is sealingly and slidably connected with the inner wall of the chute; an air outlet hole is formed in the inner wall of the second screening hole and is in communication with the interior of the second screening plate; and an air inlet groove is formed in the side of the second screening plate close to the chute and is in communication with the interior of the second screening plate.

[0007] The inner wall of the air outlet hole is fixedly connected with a fixing sleeve, the fixing sleeve is slidably connected with a magnetic rod, the top surface of the second screening plate is rotatably connected with a group of circular shafts corresponding to the air outlet hole, the circular shafts are internally hollow, the inner wall of the circular shafts is fixedly connected with magnetic blocks repelling the magnetic rod, the surface of the magnetic rod is fixedly connected with a connecting ring, and a second spring is fixedly connected between the side of the connecting ring away from the circular shaft and the fixing sleeve.

[0008] The shaking assembly comprises a protrusion fixed to the bottom surface of the fixing block, the bottom surface of the protrusion is arc-shaped, the inner wall of the side of the shell close to the fixing block is rotatably connected with a first rotating shaft, the surface of the first rotating shaft is fixedly connected with a driving rod pushing the protrusion, the outer lateral wall of the shell is provided with a motor driving the first rotating shaft to rotate, the inner wall of the shell is provided with a positioning groove, and the fixing block is slidably connected with the positioning groove.

[0009] The inner wall of the shell is fixedly connected with a connecting block, the top end of the connecting block is open, the inner wall of the connecting block is sealingly and slidably connected with a hollow moving block, the top end of the moving block is in communication with the chute, the inner wall of the connecting block is fixedly connected with a connecting plate, and the bottom surface of the connecting plate and the inner wall of the connecting block are fixedly connected with a first spring.

[0010] The inner wall of the shell is rotatably connected with a second rotating shaft, the first rotating shaft is fixedly connected with a first gear, the second rotating shaft is fixedly connected with a second gear meshing with the first gear, the outer diameter of the first gear is smaller than that of the second gear, the outer lateral wall of the second rotating shaft is fixedly connected with a group of driving leaves, the side of the connecting block away from the motor is fixedly connected with a flow guide plate, the side of the shell close to the first discharge groove is provided with a rectangular groove, and the inner wall of the rectangular groove is fixedly connected with a filter screen.

[0011] The collecting assembly comprises a collecting block fixed to the lateral wall of the shell, the interior of the collecting block is hollow, the inner wall of the collecting block is fixedly connected with an inclined partition plate, the side of the collecting block close to the shell is provided with a second feeding groove and a third feeding groove, the second feeding groove is in communication with the first discharge groove, the third feeding groove is in communication with the rectangular groove, the side of the collecting block away from the shell is provided with a third discharge groove and a fourth discharge groove, and the collecting block is provided with a sealing assembly sealing the third discharge groove and the fourth discharge groove.

[0012] The sealing assembly comprises a moving groove formed in the collecting block, the moving groove is communicated with the third discharge groove and the fourth discharge groove, a pair of sealing plates sealing the third discharge groove and the fourth discharge groove are slidably connected in the moving groove, the side of the sealing plates close to each other is fixedly connected with the third spring, the top surface of the partition plate is fixedly connected with a hollow elastic block, the inner wall of the collecting block is fixedly connected with a connecting sleeve communicated with the moving groove, the inner wall of the connecting sleeve is sealingly and slidably connected with a magnetic plate, the inner wall of the connecting sleeve is fixedly connected with a pressure sensor, the pressure sensor and the magnetic plate are fixedly connected with the fourth spring, and the elastic block and the connecting groove are communicated with a connecting pipe.

[0013] A dolomite ore fine material screening method, which adopts the dolomite ore fine material screening device, comprises the following steps:

[0014] S1: the first rotating shaft is driven to rotate by the motor, the driving rod pushes the protruding block, so that the protruding block drives the fixed block to vibrate, and the first screening plate and the second screening plate vibrate synchronously;

[0015] S2: the dolomite ore is injected into the shell from the first feeding groove, and the dolomite ore falls on the first screening plate, at this time, the vibrating screening plate screens the dolomite ore, and the smaller dolomite ore is screened by the first screening hole and then falls into the bottom of the shell to be discharged from the first discharge groove;

[0016] S3: the dolomite ore on the first screening plate is discharged from the second discharge groove into the collecting block for collection, after the first screening of the dolomite ore is completed, the second screening is driven by the electric telescopic rod to adjust the aperture of the first screening hole, and then the dolomite ore in the collecting block is subjected to secondary screening;

[0017] S4: when the first rotating shaft rotates, the second rotating shaft is driven to rotate by the first gear and the second gear, at this time, the driving blade generates wind power to blow the impurities on the falling dolomite ore, and at this time, the impurities pass through the filter screen into the collecting block;

[0018] S5: as the dolomite ore in the collecting block gradually increases, the pressure of the pressure sensor increases to start the alarm to alarm, at this time, the staff places the container for collecting the dolomite ore and the impurities at the third discharge groove and the fourth discharge groove to collect the dolomite ore and the impurities.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The present application is through the start of the electric telescopic rod, let the output end of the electric telescopic rod push the second screening board, at this time the position of the first screening hole and the second screening hole will be dislocation, so that the second screening board blocks the first screening hole, to adjust the aperture of the first screening hole, after the aperture of the first screening hole is adjusted to the appropriate position, the electric telescopic rod is closed, at this time the dolomite ore can be screened twice, to further screen smaller dolomite ore.

[0021] 2. The present application is through the output end of the electric telescopic rod to control the second screening board to move back and forth, so that the second screening board pushes the gas in the sliding groove from the air inlet groove into its inside, and then discharges from the air outlet hole, to blow on the second screening hole, then the gas diffuses to the first screening hole, to achieve the effect of dredging the first screening hole and the second screening hole, to ensure the effect of subsequent screening of dolomite. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings.

[0023] Figure 1 is the schematic diagram of the shell in the present application;

[0024] Figure 2 is the internal structure diagram of the shell in the present application;

[0025] Figure 3 is the enlarged view of A of Figure 2 ;

[0026] Figure 4 is the enlarged view of B of Figure 3 ;

[0027] Figure 5 is the sectional view of the connecting block, the moving block and the fixed block in the present application;

[0028] Figure 6 is the internal structure diagram of the collecting block in the present application;

[0029] Figure 7 is the partial structure diagram of Figure 6 ;

[0030] Figure 8 is the method flow chart in the present application.

[0031] In the diagram: 1. Shell; 2. First feed chute; 3. First discharge chute; 4. Filter screen; 5. Second discharge chute; 6. Fixing block; 7. First screening plate; 8. Second screening plate; 9. First screening hole; 10. Second screening hole; 11. Slide groove; 12. Electric telescopic rod; 13. Air inlet groove; 14. Air outlet; 15. First rotating shaft; 16. Drive rod; 17. Positioning groove; 18. Connecting block; 19. Moving block; 20. Round shaft; 21. Magnetic rod; 22. Protrusion 23. Fixed sleeve; 24. Magnetic block; 25. Connecting plate; 26. First gear; 27. Second gear; 28. Second rotating shaft; 29. ​​Drive blade; 30. Guide plate; 31. Collecting block; 32. Second feed chute; 33. Third feed chute; 34. Third discharge chute; 35. Fourth discharge chute; 36. Partition plate; 37. Sealing plate; 38. Moving chute; 39. Elastic block; 40. Connecting pipe; 41. Connecting sleeve; 42. Magnetic plate; 43. Pressure sensor. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1: As Figures 1 to 5 As shown in the figure, a dolomite fine material screening device according to an embodiment of the present invention includes a shell 1. A first feed chute 2 is formed on the top surface of the shell 1, a first discharge chute 3 is formed on the side wall of the shell 1, and a second discharge chute 5 is formed on the bottom surface of the shell 1. An inclined fixing block 6 is provided inside the shell 1. A first screening plate 7 is fixedly connected to the side of the fixing block 6 near the first discharge chute 3. Multiple sets of first screening holes 9 are formed on the first screening plate 7. A sliding groove 11 is formed on the side of the shell 1 near the first screening plate 7. A second screening plate 8 is provided inside the chute 11. The second screening plate 8 has a second screening hole 10 corresponding to the first screening hole 9. The top surface of the second screening plate 8 is in contact with the first screening plate 7. An electric telescopic rod 12 is fixedly connected inside the chute 11. The output end of the electric telescopic rod 12 is fixedly connected to the second screening plate 8. A rock collection component is provided on the side of the housing 1 near the second discharge chute 5. A shaking component is provided inside the housing 1 to shake the first screening plate 7 and the second screening plate 8.

[0034] The application can inject dolomite ore from the first feeding slot 2 into the shell 1 when performing fine screening on the dolomite ore, at this time the dolomite ore falls on the first screening plate 7, at this time the first screening plate 7 screens the dolomite ore with the help of the shaking assembly, smaller dolomite ore will be screened by the first screening hole 9 (screened as smaller fine material), and then fall into the bottom of the shell 1 to be discharged from the first discharge slot 3, larger dolomite ore will slide on the inclined first screening plate 7, and then be discharged from the first discharge slot 3 into the collecting assembly, when it is necessary to adjust the aperture of the first screening hole 9, the electric telescopic rod 12 can be started to push the second screening plate 8 at the output end of the electric telescopic rod 12, at this time the positions of the first screening hole 9 and the second screening hole 10 will be dislocated, so that the second screening plate 8 blocks the first screening hole 9, so as to adjust the aperture of the first screening hole 9, after the aperture of the first screening hole 9 is adjusted to the appropriate position, the electric telescopic rod 12 is closed, at this time the dolomite ore in the collecting assembly can be screened again to further screen smaller dolomite ore.

[0035] The second screening plate 8 is in a hollow structure, the second screening plate 8 is in sealing sliding connection with the inner wall of the chute 11, the inner wall of the second screening hole 10 is provided with an air outlet hole 14 in communication with the inside of the second screening plate 8, and the side of the second screening plate 8 close to the chute 11 is provided with an air inlet groove 13 in communication with the inside thereof; since the dolomite ore has powder or particles on the surface (which is more likely to occur after the dolomite ore is damaged), the first screening hole 9 and the second screening hole 10 will be blocked by the powder or particles after a long time, at this time the second screening plate 8 can be moved back and forth by the output end of the electric telescopic rod 12 to push the gas in the chute 11 to enter the inside thereof from the air inlet groove 13, and then be discharged from the air outlet hole 14 to blow on the second screening hole 10, and then the gas diffuses on the first screening hole 9 to achieve the effect of dredging the first screening hole 9 and the second screening hole 10, so as to ensure the screening effect of the dolomite ore.

[0036] The inner wall of the air outlet hole 14 is fixedly connected with a fixed sleeve 23, the fixed sleeve 23 is in sliding connection with a magnetic rod 21, the top surface of the second screening plate 8 is rotatably connected with a group of circular shafts 20 corresponding to the air outlet hole 14, the circular shaft 20 is in a hollow structure, the inner wall of the circular shaft 20 is fixedly connected with a magnetic block 24 repelling the magnetic rod 21, the surface of the magnetic rod 21 is fixedly connected with a connecting ring, and the side, away from the circular shaft 20, of the connecting ring is fixedly connected with a second spring between the fixed sleeve 23.

[0037] When the application dredges the screening hole, the second screening plate 8 can be controlled to move back and forth, at this time the circular shaft 20 will rotate due to the friction with the first screening plate 7, so that the magnetic block 24 repeatedly passes through the magnetic rod 21, so that the magnetic rod 21 is pushed into the second screening hole 10 by the magnetic block 24, at this time the magnetic rod 21 can dredge the second screening hole 10, if the second screening hole 10 and the first screening hole 9 have blockages, the blockages in the second screening hole 10 will be loosened by the pushing of the magnetic rod 21, so that the blockages in the second screening hole 10 fall off, at this time the blockages in the first screening hole 9 are also pushed by the magnetic rod 21, and at the same time, due to the influence of the blockages in the second screening hole 10, the air outlet hole 14 can be used for air outlet cleaning, which is more smooth for discharging, so as to improve the dredging effect of the first screening hole 9 and the second screening hole 10.

[0038] The shaking assembly comprises a protrusion 22 fixed to the bottom surface of the fixed block 6, the bottom surface of the protrusion 22 is arc-shaped, the inner wall of the shell 1 close to the fixed block 6 is rotationally connected with a first rotating shaft 15, the surface of the first rotating shaft 15 is fixedly connected with a driving rod 16 for pushing the protrusion 22, the outer side wall of the shell 1 is provided with a motor for driving the first rotating shaft 15 to rotate, the inner wall of the shell 1 is provided with a positioning groove 17, and the fixed block 6 is slidingly connected with the positioning groove 17; when the application is screening, the motor can be started to drive the first rotating shaft 15 to rotate, at this time the driving rod 16 repeatedly passes through the protrusion 22 and pushes the protrusion 22, so that the protrusion 22 pushes the fixed block 6, at this time the fixed block 6 drives the first screening plate 7 and the second screening plate 8 to shake, so as to assist in screening the dolomite ore.

[0039] The inner wall of the shell 1 is fixedly connected with a connecting block 18, the top end of the connecting block 18 is open, the inner wall of the connecting block 18 is sealingly and slidingly connected with a hollow moving block 19, the top end of the moving block 19 is in communication with the sliding groove 11, the inner wall of the connecting block 18 is fixedly connected with a connecting plate 25, and the bottom surface of the connecting plate 25 and the inner wall of the connecting block 18 are fixedly connected with a first spring; when the fixed block 6 in the application shakes, the moving block 19 is driven to move, at this time the first spring provides a buffering force, so as to provide stability of the first screening plate and the second screening plate 8 when they are shaking, and can reduce the noise generated during work, and when the fixed block 6 moves downward, the gas in the moving block 19 and the connecting block 18 can be pushed into the sliding groove 11, and then sprayed out from the air outlet hole 14, so that the first screening hole 9 and the second screening hole 10 can be continuously dredged and cleaned during the screening process.

[0040] The inner wall of the housing 1 is rotatably connected to a second rotating shaft 28. A first gear 26 is fixedly connected to the first rotating shaft 15, and a second gear 27 meshing with the first gear 26 is fixedly connected to the second rotating shaft 28. The outer diameter of the first gear 26 is smaller than that of the second gear 27. A set of drive blades 29 are fixedly connected to the outer wall of the second rotating shaft 28. A guide plate 30 is fixedly connected to the side of the connecting block 18 away from the motor. A rectangular groove is opened on the side of the housing 1 near the first discharge trough 3. A filter screen 4 is fixedly connected to the inner wall of the rectangular groove. When the first rotating shaft 15 rotates, the first gear 26 will drive the second gear 27 to rotate. Because the outer diameter of the second gear 27 is smaller than that of the first gear 26, the rotation speed of the second rotating shaft 28 will be higher than that of the first rotating shaft 15. At this time, the drive blades 29 will generate wind to blow away the impurities on the fallen dolomite. The impurities will then pass through the filter screen 4 and enter the collection component. By cleaning the impurities (dust and particles) on the dolomite, it is easier to process the dolomite in the future.

[0041] Example 2: Figures 6 to 7 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the collecting component includes a collecting block 31 fixed to the side wall of the housing 1. The collecting block 31 has a hollow structure inside. An inclined partition 36 is fixedly connected to the inner wall of the collecting block 31. A second feeding groove 32 and a third feeding groove 33 are provided on the side of the collecting block 31 near the housing 1. The second feeding groove 32 communicates with the first discharging groove 3, and the third feeding groove 33 communicates with the rectangular groove. The side of the collecting block 31 away from the housing 1... The system includes a third discharge chute 34 and a fourth discharge chute 35. The collection block 31 is equipped with a sealing assembly that seals the third discharge chute 34 and the fourth discharge chute 35. In this application, the dolomite ore that is screened and flows on the first screening plate 7 will be discharged from the first discharge chute 3, then enter the collection block 31 through the second feed chute 32, and then fall above the partition plate 36. At the same time, the impurities that have passed through the filter screen 4 will enter the collection block 31 from the third feed chute 33. The collection block 31 can store both the dolomite ore and the impurities.

[0042] The sealing assembly comprises a moving groove 38 formed in the collecting block 31, the moving groove 38 is communicated with the third discharge groove 34 and the fourth discharge groove 35, a pair of sealing plates 37 sealing the third discharge groove 34 and the fourth discharge groove 35 are slidingly connected in the moving groove 38, the side of the sealing plates 37 close to each other is fixedly connected with the third spring, the top surface of the partition plate 36 is fixedly connected with a hollow elastic block 39, the inner wall of the collecting block 31 is fixedly connected with a connecting sleeve 41 communicated with the moving groove 38, the inner wall of the connecting sleeve 41 is sealingly and slidingly connected with a magnetic plate 42, the inner wall of the connecting sleeve 41 is fixedly connected with a pressure sensor 43, the fourth spring is fixedly connected between the pressure sensor 43 and the magnetic plate 42, and the connecting pipe 40 is communicated between the elastic block 39 and the connecting groove.

[0043] When the dolomite ore falls on the partition plate 36, the dolomite ore will exert pressure on the elastic block 39, and as the dolomite ore gradually increases, the pressure on the elastic block 39 will become greater, at this time, the gas in the elastic block 39 will enter the connecting sleeve 41 from the connecting pipe 40, so that the gas pushes the magnetic block 24, and the greater the pressure on the elastic block 39, the greater the pressure in the connecting sleeve 41, at this time, the fourth spring exerts greater pulling force on the pressure sensor 43, and an alarm can be arranged on the shell 1, and when the pressure sensor 43 reaches a certain pressure value, the alarm can be started to alarm, at this time, the staff can place the container for collecting dolomite ore and impurities at the third discharge groove 34 and the fourth discharge groove 35 in advance, and as the gas in the connecting sleeve 41 becomes more and more, the magnetic block 24 will be pushed into the moving groove 38 to drive the sealing plate 37, so that the sealing plate 37 no longer seals the third discharge groove 34 and the fourth discharge groove 35, and at this time, the dolomite ore and impurities can be discharged from the third discharge groove 34 and the fourth discharge groove 35.

[0044] As shown in Figure 8 A dolomite ore fine material screening method, the method uses the dolomite ore fine material screening device, the method comprises the following steps:

[0045] S1: the first rotating shaft 15 is driven to rotate by the motor, the driving rod 16 pushes the protruding block 22, so that the protruding block 22 drives the fixed block 6 to vibrate, and at this time, the first screening plate 7 and the second screening plate 8 vibrate synchronously;

[0046] S2: the dolomite ore is injected into the shell 1 from the first feeding groove 2, and the dolomite ore falls on the first screening plate 7, at this time, the vibrating screening plate screens the dolomite ore, and the smaller dolomite ore is screened by the first screening hole 9 and then falls into the bottom of the shell 1 to be discharged from the first discharge groove 3;

[0047] S3: The dolomite ore on the first screening plate 7 will be discharged from the second discharge slot 5 into the collection block 31 for collection, waiting for the first screening of dolomite to be completed, and then driving the second screening to move by the electric telescopic rod 12 to adjust the aperture of the first screening hole 9, and then performing secondary screening on the dolomite ore in the collection block 31;

[0048] S4: When the first rotating shaft 15 rotates, the second rotating shaft 28 will be driven to rotate by means of the first gear 26 and the second gear 27, at this time the driving leaf 29 will generate wind power to blow the impurities on the falling dolomite, at this time the impurities will pass through the filter screen 4 into the collection block 31;

[0049] S5: As the dolomite ore in the collection block 31 gradually increases, the pressure sensor 43 will be subjected to increased pressure to start the alarm to alarm, at this time the staff will place the container for collecting dolomite and impurities at the third discharge slot 34 and the fourth discharge slot 35 to collect the dolomite and impurities.

[0050] Working principle: by injecting dolomite ore from the first feeding slot 2 into the shell 1, at this time the dolomite ore falls on the first screening plate 7, at this time the first screening plate 7 screens the dolomite ore by means of the shaking assembly, the smaller dolomite ore will be screened by the first screening hole 9 (the screened is smaller fine material), and then fall into the bottom of the shell 1 to be discharged from the first discharge slot 3, the larger dolomite ore will slide on the inclined first screening plate 7, and then be discharged from the first discharge slot 3 into the collection assembly, when it is necessary to adjust the aperture of the first screening hole 9, the electric telescopic rod 12 can be started to push the second screening plate 8 by the output end of the electric telescopic rod 12, at this time the positions of the first screening hole 9 and the second screening hole 10 will be dislocated, so that the second screening plate 8 blocks the first screening hole 9 to adjust the aperture of the first screening hole 9, after the aperture of the first screening hole 9 is adjusted to the appropriate position, the electric telescopic rod 12 is turned off, at this time the dolomite ore in the collection assembly can be subjected to secondary screening to further screen smaller dolomite ore; because the dolomite ore has powder or particles on its surface (which is more likely to occur after the dolomite ore is damaged), so that the first screening hole 9 and the second screening hole 10 will be blocked by the powder or particles after a long time, at this time the second screening plate 8 can be moved back and forth by the output end of the electric telescopic rod 12 to push the gas in the sliding groove 11 to enter from the air inlet slot 13 into the inside, and then be discharged from the air outlet hole 14 to blow on the second screening hole 10, and then the gas diffuses to the first screening hole 9 to achieve the effect of dredging the first screening hole 9 and the second screening hole 10 to ensure the effect of subsequent screening of dolomite;

[0051] When the application dredges the screening hole, the second screening plate 8 can be controlled to move back and forth, at this time, the circular shaft 20 will rotate due to the friction with the first screening plate 7, so that the magnetic block 24 repeatedly passes through the magnetic rod 21, so that the magnetic rod 21 is pushed into the second screening hole 10 by the magnetic block 24, at this time, the magnetic rod 21 can dredge the second screening hole 10, if the second screening hole 10 and the first screening hole 9 are both blocked, the blockage in the second screening hole 10 will be loosened due to the pushing of the magnetic rod 21, so that the blockage in the second screening hole 10 falls, at this time, the blockage in the first screening hole 9 is also pushed by the magnetic rod 21, and because the lower part is affected by the blockage in the second screening hole 10, the air outlet hole 14 can be used for air outlet cleaning, which is more smooth for discharge, so as to improve the dredging effect of the first screening hole 9 and the second screening hole 10; when the application is screening, the motor can be started to drive the first rotating shaft 15 to rotate, at this time, the driving rod 16 will repeatedly pass through the protrusion 22 and push the protrusion 22, so that the protrusion 22 pushes the fixed block 6, at this time, the fixed block 6 will drive the first screening plate 7 and the second screening plate 8 to vibrate, so as to assist in screening the dolomite ore;

[0052] When the fixed block 6 in the application is shaken, the moving block 19 will be moved, at this time, the first spring will provide a buffering force, so as to provide stability when the first screening plate and the second screening plate 8 are shaken, which can reduce the noise generated during work, and when the fixed block 6 moves downward, the gas in the moving block 19 and the connecting block 18 can be pushed into the chute 11, and then sprayed from the air outlet hole 14, so that the first screening hole 9 and the second screening hole 10 can be continuously dredged and cleaned during the screening process; when the first rotating shaft 15 rotates, the first gear 26 drives the second gear 27 to rotate, because the outer diameter of the second gear 27 is smaller than that of the first gear 26, the rotating speed of the second rotating shaft 28 is higher than that of the first rotating shaft 15, at this time, the driving leaf 29 will generate wind power to blow the impurities on the fallen dolomite, at this time, the impurities will pass through the filter screen 4 and enter the collection assembly, by cleaning the impurities (dust and particles) on the dolomite, the subsequent treatment of the dolomite can be facilitated.

[0053] The above-mentioned front, rear, left, right, up and down are based on the drawings of the specification Figure 1 , according to the standard of human observation angle, the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and the like.

[0054] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings and are used only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dolomite ore fines screening device, comprising a shell (1), a first feeding slot (2) is formed in the top surface of the shell (1), a first discharging slot (3) is formed in the side wall of the shell (1), and a second discharging slot (5) is formed in the bottom surface of the shell (1); characterized in that An inclined fixed block (6) is arranged in the shell (1), a first screening plate (7) is fixedly connected to the side of the fixed block (6) close to the first discharging slot (3), and a plurality of groups of first screening holes (9) are formed in the first screening plate (7); A sliding groove (11) is formed in the side of the shell (1) close to the first screening plate (7), a second screening plate (8) is arranged in the sliding groove (11), second screening holes (10) corresponding to the first screening holes (9) are formed in the second screening plate (8), and the top surface of the second screening plate (8) is attached to the first screening plate (7); An electric telescopic rod (12) is fixedly connected in the sliding groove (11), the output end of the electric telescopic rod (12) is fixedly connected with the second screening plate (8), a rock ore collecting assembly is arranged on the side of the shell (1) close to the second discharging slot (5), and a shaking assembly is arranged in the shell (1) to shake the first screening plate (7) and the second screening plate (8); The second screening plate (8) is in a hollow structure, the second screening plate (8) is in sealing sliding connection with the inner wall of the sliding groove (11), air outlet holes (14) in communication with the inside of the second screening plate (8) are formed in the inner wall of the second screening holes (10), and air inlet grooves (13) in communication with the inside of the second screening plate (8) are formed in the side of the second screening plate (8) close to the sliding groove (11).

2. A dolomite ore fines screening device as claimed in claim 1, wherein: A fixed sleeve (23) is fixedly connected to the inner wall of the air outlet hole (14), a magnetic rod (21) is in sliding connection in the fixed sleeve (23), a group of circular shafts (20) corresponding to the air outlet holes (14) are in rotary connection with the top surface of the second screening plate (8), the circular shafts (20) are in a hollow structure, magnetic blocks (24) repelling the magnetic rod (21) are fixedly connected to the inner wall of the circular shafts (20), a connecting ring is fixedly connected to the surface of the magnetic rod (21), and a second spring is fixedly connected between the connecting ring away from the circular shaft (20) and the fixed sleeve (23).

3. A dolomite ore fines screening device as claimed in claim 2, wherein: The shaking assembly comprises a protrusion (22) fixed to the bottom surface of the fixed block (6), the bottom surface of the protrusion (22) is arc-shaped, a first rotating shaft (15) is in rotary connection with the inner wall side of the shell (1) close to the fixed block (6), a driving rod (16) pushing the protrusion (22) is fixedly connected to the surface of the first rotating shaft (15), a motor driving the first rotating shaft (15) to rotate is arranged on the outer side wall of the shell (1), a positioning groove (17) is formed in the inner wall of the shell (1), and the fixed block (6) is in sliding connection with the positioning groove (17).

4. A dolomite ore fines screening device as claimed in claim 3, wherein: The inner wall of the shell (1) is fixedly connected with a connecting block (18), the top end of the connecting block (18) is provided with an opening, the inner wall of the connecting block (18) is sealingly and slidably connected with a hollow moving block (19), the top end of the moving block (19) is communicated with the sliding groove (11), the inner wall of the connecting block (18) is fixedly connected with a connecting plate (25), and the bottom surface of the connecting plate (25) is fixedly connected with the inner wall of the connecting block (18) and is provided with a first spring.

5. A dolomite ore fines screening device as claimed in claim 4, wherein: The inner wall of the shell (1) is rotatably connected with a second rotating shaft (28), the first rotating shaft (15) is fixedly connected with a first gear (26), the second rotating shaft (28) is fixedly connected with a second gear (27) engaged with the first gear (26), the outer diameter of the first gear (26) is smaller than that of the second gear (27), the outer side wall of the second rotating shaft (28) is fixedly connected with a group of driving leaves (29), the side of the connecting block (18) away from the motor is fixedly connected with a flow guide plate (30), the side of the shell (1) close to the first discharge slot (3) is provided with a rectangular groove, and the inner wall of the rectangular groove is fixedly connected with a filter screen (4).

6. A dolomite ore fines screening device as claimed in claim 5, wherein: The collecting assembly comprises a collecting block (31) fixed to the side wall of the shell (1), the collecting block (31) is in a hollow structure, the inner wall of the collecting block (31) is fixedly connected with an inclined partition plate (36), the side of the collecting block (31) close to the shell (1) is provided with a second feeding slot (32) and a third feeding slot (33), the second feeding slot (32) is communicated with the first discharge slot (3), the third feeding slot (33) is communicated with the rectangular groove, and the side of the collecting block (31) away from the shell (1) is provided with a third discharge slot (34) and a fourth discharge slot (35).

7. A dolomite ore fines screening device as claimed in claim 6, wherein: The sealing assembly comprises a moving groove (38) formed in the collecting block (31), the moving groove (38) is communicated with the third discharge slot (34) and the fourth discharge slot (35), the moving groove (38) is slidably connected with a pair of sealing plates (37) sealing the third discharge slot (34) and the fourth discharge slot (35), the side of the sealing plates (37) close to each other is fixedly connected with a third spring, the top surface of the partition plate (36) is fixedly connected with a hollow elastic block (39), the inner wall of the collecting block (31) is fixedly connected with a connecting sleeve (41) communicated with the moving groove (38), the inner wall of the connecting sleeve (41) is sealingly and slidably connected with a magnetic plate (42), the inner wall of the connecting sleeve (41) is fixedly connected with a pressure sensor (43), the pressure sensor (43) and the magnetic plate (42) are fixedly connected with a fourth spring, and the elastic block (39) is communicated with the connecting groove through a connecting pipe (40).

8. A method of sizing dolomite fines using a dolomite fines sizing apparatus as claimed in claim 7, characterised by: The method comprises the following steps: S1: the first rotating shaft (15) is driven to rotate by the motor, the driving rod (16) pushes the protrusion (22), so that the protrusion (22) drives the fixed block (6) to shake, and the first screening plate (7) and the second screening plate (8) will shake synchronously; S2: the dolomite ore is injected into the shell (1) from the first feeding slot (2), and the dolomite ore falls on the first screening plate (7), at this time, the screening plate shakes to screen the dolomite, and the smaller dolomite ore is screened by the first screening hole (9), and then falls into the bottom of the shell (1) to be discharged from the first discharging slot (3); S3: the dolomite ore on the first screening plate (7) is discharged from the second discharging slot (5) into the collecting block (31) for collection, after the first screening of the dolomite is completed, the second screening is driven to move by the electric telescopic rod (12) to adjust the aperture of the first screening hole (9), and then the dolomite ore in the collecting block (31) is screened again.

9. A method of dolomite ore fines sizing as claimed in claim 8, wherein: The method further comprises the following steps: S4: when the first rotating shaft (15) rotates, the second rotating shaft (28) is driven to rotate by the first gear (26) and the second gear (27), at this time, the driving blade (29) generates wind power to blow the impurities on the falling dolomite, at this time, the impurities enter the collecting block (31) through the filter screen (4); S5: as the dolomite ore in the collecting block (31) gradually increases, the pressure sensor (43) will be subjected to increased pressure to start the alarm to alarm, at this time, the staff places the container for collecting the dolomite ore and the impurities at the third discharging slot (34) and the fourth discharging slot (35) to collect the dolomite ore and the impurities.

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