Screening and impurity removing device for fine ore

Abstract

The utility model provides a fine ore screening and impurity removing device, and relates to the technical field of fine ore screening and impurity removing, the fine ore screening and impurity removing device comprises a first fine ore screening and impurity removing mechanism and a second fine ore screening and impurity removing mechanism, the feeding end of the first fine ore screening and impurity removing mechanism is provided with a first conveying belt; a second conveying belt is arranged between the first discharging end of the first fine ore screening and impurity removing mechanism and the feeding end of the second fine ore screening and impurity removing mechanism, a first collecting box is arranged at the second discharging end of the first fine ore screening and impurity removing mechanism, and a third conveying belt is arranged at the first discharging end of the second fine ore screening and impurity removing mechanism. A second collecting box is arranged at the second discharging end of the second fine ore screening and impurity removing mechanism. According to the system, by arranging the first fine ore screening and impurity removing mechanism and the second fine ore screening and impurity removing mechanism, fine ore is subjected to graded impurity removing, the raw material impurity removing effect is effectively improved, the stable material quality is guaranteed, then the stable product quality and continuous production operation are guaranteed, foreign matter does not need to be manually and frequently cleaned, and time and labor are saved.

Description

Technical Field

[0001] This application relates to the technical field of screening and impurity removal of fine ore, and more specifically, to a fine ore screening and impurity removal device. Background Art

[0002] Foreign objects such as wooden sticks, woven bags, plastic sheets, rubber skins, steel wires, scrap iron, rags, and large pieces of materials are often mixed in the raw materials of steel plants. These foreign objects are likely to scratch the conveyor belt or block the chute, increasing the system resistance and reducing the system output, thereby affecting the product quality and production stability. To ensure the stable quality of the materials and the continuous operation of the system, it is usually necessary to manually clean the foreign objects frequently, which is time-consuming and laborious.

[0003] The foreign objects in fine ore are relatively difficult to separate. Fine ore is a powdery iron-containing raw material, which is an important raw material for steel plants. It is required to have stable quality and no impurities. However, fine ore has a high moisture content and strong viscosity, and it is easy to agglomerate by itself, making it difficult to clean the foreign objects. Especially in the rainy season, the moisture content of the raw materials is high, and the fine ore adheres to each other to form lumps or adheres to the sieve surface, reducing the effective screening area, resulting in a decrease in screening efficiency. The fine ore does not loosen or stratify, and the fine ore and the sieve move as a whole, making it difficult to complete the screening process. Existing screening and impurity removal equipment is difficult to achieve a good separation effect of foreign objects in fine ore. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a fine ore screening and impurity removal device, which can solve the technical problem that existing screening and impurity removal equipment is difficult to achieve a good separation effect of foreign objects in fine ore.

[0005] The embodiments of this application provide a fine ore screening and impurity removal device, including a first fine ore screening and impurity removal mechanism and a second fine ore screening and impurity removal mechanism. A first conveyor belt is arranged at the feeding end of the first fine ore screening and impurity removal mechanism. A second conveyor belt is arranged between the first discharging end of the first fine ore screening and impurity removal mechanism and the feeding end of the second fine ore screening and impurity removal mechanism. A first collection box is arranged at the second discharging end of the first fine ore screening and impurity removal mechanism. A third conveyor belt is arranged at the first discharging end of the second fine ore screening and impurity removal mechanism. A second collection box is arranged at the second discharging end of the second fine ore screening and impurity removal mechanism.

[0006] Among them, the first fine ore screening and impurity removal mechanism includes a first box body, a rotating roller, a first motor, a feeding hopper, a first discharging hopper, and a plurality of impurity removal components. The rotating roller is rotatably arranged inside the first box body through bearings. The first motor is arranged outside the first box body and is connected to the rotating roller. The plurality of impurity removal components are evenly distributed on the rotating roller. The impurity removal component includes a plurality of evenly distributed tooth plates, and the tooth plates of the impurity removal component are staggered with the tooth plates of the adjacent impurity removal component. The feeding hopper and the first discharging hopper are both communicated and arranged at the bottom of the first box body.

[0007] Among them, the second fine ore screening and impurity removal mechanism includes a second box body, a sieve plate assembly, a bracket, a blanking bin, a second motor, a coupling and a vibrator. The bracket is arranged inside the second box body. The sieve plate assembly is fixedly arranged on the bracket. The blanking bin is communicated and arranged at the bottom of the second box body. The second motor is arranged outside the second box body, and the second motor is connected to the sieve plate assembly through the coupling. The vibrator is arranged on the second box body, and the vibrator is connected to one end of the sieve plate assembly far away from the coupling.

[0008] The sieve plate assembly includes a first sieve plate and a second sieve plate which are inclined. The second sieve plate is arranged at the lower side of the first sieve plate. The first sieve plate includes a plurality of bar sieve plates arranged in a spliced manner. The second sieve plate includes a plurality of relaxation sieve plates arranged in a spliced manner.

[0009] Among them, a maintenance door is arranged on the first box body.

[0010] Among them, the distance between adjacent toothed plates of the same impurity removal component is 30-80 mm.

[0011] Among them, it further includes a first bracket and a second bracket. The second box body is fixedly arranged on the first bracket. The second motor is fixedly arranged on the second bracket. A shock-absorbing spring is pre-pressed between the second box body and the first bracket.

[0012] Among them, a feed hopper is communicated and arranged at the feed end of the second box body. A second discharge hopper is communicated and arranged at the second discharge end of the second box body. A distributor is arranged in the feed hopper.

[0013] Among them, a sealing cover is arranged on the top of the second box body.

[0014] Among them, the relaxation sieve plate is made of a high-elastic polyurethane material.

[0015] Among them, the aperture of the sieve holes of the bar sieve plate and the aperture of the sieve holes of the relaxation sieve plate are both 30-80 mm.

[0016] The beneficial effects of the present utility model:

[0017] A powder ore screening and impurity removal device provided by the utility model, when in use, the powder ore is conveyed to the first powder ore screening and impurity removal mechanism through the first conveyor belt for preliminary impurity removal to separate large foreign matters. After the large foreign matters are discharged from the second discharge end of the first powder ore screening and impurity removal mechanism and fall into the first collection box, the powder ore after preliminary impurity removal is discharged from the first discharge end of the first powder ore screening and impurity removal mechanism and then conveyed to the second powder ore screening and impurity removal mechanism through the second conveyor belt for secondary impurity removal to separate small foreign matters. After the small foreign matters are discharged from the second discharge end of the second powder ore screening and impurity removal mechanism and fall into the second collection box, the powder ore after secondary impurity removal is discharged from the first discharge end of the second powder ore screening and impurity removal mechanism and then conveyed to the next production process through the third conveyor belt; by setting the first powder ore screening and impurity removal mechanism and the second powder ore screening and impurity removal mechanism, the powder ore is classified and impurity-removed, effectively improving the impurity removal effect of the raw materials, ensuring the stable quality of the materials, and further ensuring the stable quality of the products and the continuous operation of the production. There is no need for manual frequent cleaning of foreign matters, which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure in some embodiments of the present application;

[0020] Figure 2 It is a front view structural schematic diagram of the first powder ore screening and impurity removal mechanism in some embodiments of the present application;

[0021] Figure 3 It is a structural schematic diagram of the rotating roller and the impurity removal component in some embodiments of the present application;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the first powder ore screening and impurity removal mechanism in some embodiments of the present application;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the first powder ore screening and impurity removal mechanism from another perspective in some embodiments of the present application;

[0024] Figure 6 It is a front view structural schematic diagram of the second powder ore screening and impurity removal mechanism in some embodiments of the present application;

[0025] Figure 7 It is a side view structural schematic diagram of the second powder ore screening and impurity removal mechanism in some embodiments of the present application;

[0026] Figure 8 Structural schematic diagram of the first sieve plate in some embodiments of the present application;

[0027] Figure 9 Structural schematic diagram of the second sieve plate in some embodiments of the present application.

[0028] The reference numerals are respectively:

[0029] 1. First fine ore screening and impurity removal mechanism; 11. First box body; 12. Rotating roller; 13. First motor; 14. Feeding hopper; 15. First discharge hopper; 16. Impurity removal component; 16a. Tooth plate; 17. Inspection door;

[0030] 2. Second fine ore screening and impurity removal mechanism; 21. Second box body; 22. Sieve plate assembly; 22a. First sieve plate; 22b. Second sieve plate; 22c. Bar sieve plate; 22d. Relaxing sieve plate; 23. Bracket; 24. Feeding bin; 25. Second motor; 26. Coupling; 27. Vibrator; 28. First support; 29. Second support; 210. Shock-absorbing spring; 211. Feeding hopper; 212. Second discharge hopper; 213. Distributor; 214. Sealing cover;

[0031] 3. First conveyor belt;

[0032] 4. Second conveyor belt;

[0033] 5. First collection box;

[0034] 6. Third conveyor belt;

[0035] 7. Second collection box. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0038] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0040] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0042] As Figure 1 shown, the embodiment of the present application provides a powder ore screening and impurity removal device, including a first powder ore screening and impurity removal mechanism 1 and a second powder ore screening and impurity removal mechanism 2. A first conveyor belt 3 is arranged at the feeding end of the first powder ore screening and impurity removal mechanism 1. A second conveyor belt 4 is arranged between the first discharging end of the first powder ore screening and impurity removal mechanism 1 and the feeding end of the second powder ore screening and impurity removal mechanism 2. A first collection box 5 is arranged at the second discharging end of the first powder ore screening and impurity removal mechanism 1. A third conveyor belt 6 is arranged at the first discharging end of the second powder ore screening and impurity removal mechanism 2. A second collection box 7 is arranged at the second discharging end of the second powder ore screening and impurity removal mechanism 2.

[0043] During use, the powdered ore is conveyed by the first conveyor belt 3 to the first powdered ore screening and impurity removal mechanism 1 for preliminary impurity removal to separate large foreign objects. After the large foreign objects are discharged from the second discharge end of the first powdered ore screening and impurity removal mechanism 1 and fall into the first collection box 5, the powdered ore after preliminary impurity removal is discharged from the first discharge end of the first powdered ore screening and impurity removal mechanism 1 and then conveyed by the second conveyor belt 4 to the second powdered ore screening and impurity removal mechanism 2 for secondary impurity removal to separate small foreign objects. After the small foreign objects are discharged from the second discharge end of the second powdered ore screening and impurity removal mechanism 2 and fall into the second collection box 7, the powdered ore after secondary impurity removal is discharged from the first discharge end of the second powdered ore screening and impurity removal mechanism 2 and then conveyed by the third conveyor belt 6 to the next production process; by setting the first powdered ore screening and impurity removal mechanism 1 and the second powdered ore screening and impurity removal mechanism 2, the powdered ore is classified and impurity-removed, effectively improving the impurity removal effect of the raw materials, ensuring the stability of the material quality, and further ensuring the stability of the product quality and the continuous operation of the production. There is no need for manual frequent cleaning of foreign objects, saving time and effort.

[0044] As Figures 2 to 5 shown, in this embodiment, the first powdered ore screening and impurity removal mechanism 1 includes a first box body 11, a rotating roller 12, a first motor 13, a feeding hopper 14, a first discharge hopper 15 and a plurality of impurity removal components 16. The rotating roller 12 is rotatably arranged inside the first box body 11 through bearings. The first motor 13 is arranged outside the first box body 11 and is connected to the rotating roller 12. The plurality of impurity removal components 16 are evenly distributed on the rotating roller 12. The impurity removal component 16 includes a plurality of evenly distributed toothed plates 16a. The toothed plates 16a of the impurity removal component 16 and the toothed plates 16a of the adjacent impurity removal component 16 are staggered. The feeding hopper 14 and the first discharge hopper 15 are both connected and arranged at the bottom of the first box body 11.

[0045] During use, the first motor 13 drives the rotating roller 12 to rotate, the rotating roller 12 drives the plurality of impurity removal components 16 to rotate, and the powdered ore enters the first box body 11 and falls onto the impurity removal components 16 for screening. The powdered ore meeting the particle size requirements passes through the gaps between the toothed plates 16a and then falls into the feeding hopper 14. The large foreign objects larger than the gap spacing are intercepted on the toothed plates 16a. Subsequently, the large foreign objects rotate with the toothed plates 16a until they fall into the first discharge hopper 15 and are discharged from the first box body 11, and then the large foreign objects fall into the first collection box 5.

[0046] As Figure 5 shown, in this embodiment, a maintenance door 17 is provided on the first box body 11; the maintenance door 17 is convenient for staff to perform maintenance and repair.

[0047] In this embodiment, the spacing between adjacent toothed plates 16a of the same impurity removal component 16 is 30 - 80 mm; specifically, 60 mm can be preferably selected.

[0048] The first fine ore screening and impurity removal mechanism 1 separates large foreign objects that are relatively easy to separate. The first fine ore screening and impurity removal mechanism 1 meets the coal processing capacity of 2000 t / h and the ore processing capacity of 1500 t / h. The belt widths of the supporting first conveyor belt 3 and the second conveyor belt 4 are 1.6 m and 1.4 m respectively, and the belt speed is 2 m / s. It is required to separate large foreign objects larger than 60 mm. The moisture content of the fine ore is 5-10%, and the maximum can reach 15%. It has good impurity removal ability for hard block foreign objects such as stones, iron blocks, anchor rods, wood, and soft fiber foreign objects such as woven bags and plastics, and the impurity removal rate is not less than 90%.

[0049] Multiple first fine ore screening and impurity removal mechanisms 1 can be set according to actual use requirements. The spacing of the tooth plates 16a of multiple first fine ore screening and impurity removal mechanisms 1 decreases in sequence. For example, the spacing of the tooth plates 16a of the first first fine ore screening and impurity removal mechanism 1 is 80 mm, and the spacing of the tooth plates 16a of the second first fine ore screening and impurity removal mechanism 1 is 60 mm, so as to carry out step-by-step classification and impurity removal of the fine ore and further improve the impurity removal effect of the raw materials.

[0050] The second fine ore screening and impurity removal mechanism 2 separates small foreign objects. The second fine ore screening and impurity removal mechanism 2 meets the fine ore processing capacity of 1000 t / h. The belt width of the supporting third conveyor belt 6 is 1.2 m, and the belt speed is 2 m / s. It is required to separate small foreign objects larger than 40 mm.

[0051] As Figures 6 to 9 shown, in this embodiment, the second fine ore screening and impurity removal mechanism 2 includes a second box body 21, a screen plate assembly 22, a bracket 23, a blanking bin 24, a second motor 25, a coupling 26 and an exciter 27. The bracket 23 is arranged inside the second box body 21. The screen plate assembly 22 is fixedly arranged on the bracket 23. The blanking bin 24 is communicated and arranged at the bottom of the second box body 21. The second motor 25 is arranged outside the second box body 21, and the second motor 25 is connected to the screen plate assembly 22 through the coupling 26. The exciter 27 is arranged on the second box body 21, and the exciter 27 is connected to the end of the screen plate assembly 22 away from the coupling 26;

[0052] The screen plate assembly 22 includes an inclined first screen plate 22a and a second screen plate 22b. The second screen plate 22b is arranged below the side of the first screen plate 22a. The first screen plate 22a includes a plurality of spliced bar screen plates 22c, and the second screen plate 22b includes a plurality of spliced relaxation screen plates 22d.

[0053] During use, under the combined action of the second motor 25, the coupling 26 and the vibrator 27, the sieve plate assembly 22 is driven to vibrate. The powdered ore enters the second box body 21 and falls onto the first sieve plate 22a for screening. Subsequently, the powdered ore slides along the first sieve plate 22a to the second sieve plate 22b for further screening. The powdered ore that meets the particle size requirements passes through the sieve holes on the bar screen plate 22c or the sieve holes on the relaxation sieve plate 22d and then falls into the blanking bin 24. Foreign matters larger than the sieve hole diameter slide along the second sieve plate 22b to the second discharge hopper 212 and are discharged from the second box body 21. By setting the bar screen plate 22c and the relaxation sieve plate 22d, the bar screen plate 22c has a high opening rate, which is conducive to the powdered ore passing through the sieve. The relaxation sieve plate 22d can effectively prevent wet and sticky powdered ore from blocking the sieve holes. The combined use of the bar screen plate 22c and the relaxation sieve plate 22d can effectively improve the separation effect of powdered ore and foreign matters.

[0054] As Figure 6 and 7 shown, in this embodiment, it further includes a first support 28 and a second support 29. The second box body 21 is fixedly arranged on the first support 28, and the second motor 25 is fixedly arranged on the second support 29. A shock-absorbing spring 210 is pre-compressed between the second box body 21 and the first support 28. The shock-absorbing spring 210 plays a shock-absorbing role for the second box body 21 and extends the service life.

[0055] As Figure 6 and 7 shown, in this embodiment, a feed hopper 211 is connected and arranged at the feed end of the second box body 21, and a second discharge hopper 212 is connected and arranged at the second discharge end of the second box body 21. A distributor 213 is arranged in the feed hopper 211.

[0056] During use, the powdered ore enters the second box body 21 from the feed hopper 211 after passing through the distributor 213. Small foreign matters larger than the sieve hole diameter slide along the second sieve plate 22b to the second discharge hopper 212 and are discharged from the second box body 21. The distributor 213 enables the powdered ore to be evenly distributed, improves the dispersion degree of the powdered ore, prevents the powdered ore from accumulating, improves the subsequent screening efficiency, and provides a buffering effect on the powdered ore to prevent local wear of the sieve plate assembly 22.

[0057] As Figure 6 and 7 shown, in this embodiment, a sealing cover 214 is arranged on the top of the second box body 21. The sealing cover 214 can improve the sealing performance of the second box body 21 and prevent dust from escaping.

[0058] In this embodiment, the relaxation sieve plate 22d is made of a high-elastic polyurethane material. The relaxation sieve plate 22d made of the high-elastic polyurethane material makes a periodic elastic flexure movement during vibration, causing the shape of the sieve holes to also change periodically, effectively preventing wet and sticky powdered ore from blocking the sieve holes. The relaxation sieve plate 22d makes a relaxation movement during vibration, providing a greater acceleration to the powdered ore and improving the screening efficiency.

[0059] In this embodiment, the aperture of the sieve holes of the bar screen plate 22c and the aperture of the sieve holes of the relaxation screen plate 22d are both 30 - 80 mm; specifically, 40 mm can be preferably selected.

[0060] The powdered ore has strong viscosity, poor fluidity, is not loose, and does not stratify. It is necessary to have a sufficiently large acceleration between the powdered ore and the screen plate to make the powdered ore particles loose and stratified. However, only acceleration is not enough because the screening process of wet and sticky powdered ore also requires space. If the screen surface vibrates too fast, the powdered ore particles cannot be thrown up, and ultimately the screening effect cannot be achieved. At the same time, it also takes time for the powdered ore particles to pass through the screen. Existing screening equipment such as chute screens and grids are difficult to achieve a good separation effect of powdered ore and foreign matters.

[0061] The problem of powder plugging the holes can be solved by increasing the vibration intensity. However, to solve the sticky powder adhered to the surface of large particles, a sufficiently large breaking force is required for the large particles to break away from the powder. Relying only on the force between the screen surface and the powdered ore is not enough. This requires that during the loosening and stratification process of large particles, there are a large number of mutual impacts between large particles, generating mutual forces to peel off the sticky powder on the surface of large particles. Therefore, in order to improve the screening efficiency of wet and sticky powdered ore and increase the processing capacity, the wet and sticky powdered ore needs to be forcibly loosened. However, if the frequency is too high, the stratification cannot proceed normally, affecting the screening effect. Therefore, a higher amplitude of 8 - 11 mm and a lower frequency of 12 Hz should be adopted.

[0062] The vibration intensity K is the ratio of the acceleration of the vibrating screen box to the gravitational acceleration and is an important indicator. Usually, the vibration intensity K of vibrating screens in China is 3 - 4. However, for wet and sticky powdered ore, a vibration intensity K of 3 - 4 is too small, and a vibration intensity K of 5 - 9 is more appropriate because the screening of wet and sticky powdered ore requires the inertial force generated by throwing up the powdered ore to be able to overcome the adhesion force between the wet and sticky powdered ore and the screen wire. When the vibration intensity increases, the relative movement speed between the powdered ore and the screen surface when the powdered ore falls back will increase, making the powdered ore loose and increasing the contact area with the screen mesh, which is the key to screening.

[0063] The speed at which the powdered ore is thrown up in the double-frequency screen is 2 - 3 times that of the ordinary vibrating screen. During the screening process of wet and sticky fine-grained powdered ore, it will always adhere to the screen wire, making the adhesion force much greater than its own gravity. Therefore, it is crucial for the powdered ore to break away from the adhesion force. The ability of the powdered ore to break away from the adhesion force in the double-frequency screen is 6 - 7 times that of the ordinary screen. From the process parameter characteristics and industrial applications of the double-frequency screen, it can effectively process wet and sticky powdered ore, with high screening efficiency and large processing capacity. Therefore, it is most suitable to select a double-frequency screen with high amplitude, low frequency, and high vibration intensity for powdered ore screening.

[0064] Working principle: When the fine ore screening and impurity removal device provided in this application is in use, the fine ore is conveyed to the first fine ore screening and impurity removal mechanism 1 through the first conveyor belt 3 for preliminary impurity removal to separate large foreign matters. The first motor 13 drives the rotating roller 12 to rotate, and the rotating roller 12 drives a plurality of impurity removal components 16 to rotate. The fine ore enters the first box body 11 and falls onto the impurity removal components 16 for screening. The fine ore meeting the particle size requirements passes through the gaps of the tooth plates 16a and then falls into the blanking hopper 14. The large foreign matters larger than the gap spacing are intercepted on the tooth plates 16a. Subsequently, the large foreign matters rotate with the tooth plates 16a until they fall into the first discharge hopper 15 and are discharged from the first box body 11. The large foreign matters fall into the first collection box 5 after being discharged from the second discharge end of the first fine ore screening and impurity removal mechanism 1. After the fine ore after preliminary impurity removal is discharged from the first discharge end of the first fine ore screening and impurity removal mechanism 1, it is conveyed to the second fine ore screening and impurity removal mechanism 2 through the second conveyor belt 4 for secondary impurity removal to separate small foreign matters. Under the combined action of the second motor 25, the coupling 26, and the vibrator 27, the sieve plate assembly 22 is driven to vibrate. The fine ore enters the second box body 21 after passing through the distributor 213 from the feed hopper 211. The fine ore enters the second box body 21 and falls onto the first sieve plate 22a for screening. Subsequently, the fine ore slides along the first sieve plate 22a to the second sieve plate 22b for continuous screening. The fine ore meeting the particle size requirements passes through the sieve holes on the bar screen plate 22c or the sieve holes on the loose sieve plate 22d and then falls into the blanking bin 24. The small foreign matters larger than the sieve hole diameter slide along the second sieve plate 22b and are discharged from the second discharge hopper 212 out of the second box body 21. The small foreign matters fall into the second collection box 7 after being discharged from the second discharge end of the second fine ore screening and impurity removal mechanism 2. After the fine ore after secondary impurity removal is discharged from the first discharge end of the second fine ore screening and impurity removal mechanism 2, it is conveyed to the next production process through the third conveyor belt 6.

[0065] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A fine ore screening and impurity removal device, characterized in that: It includes a first fine ore screening and impurity removing mechanism (1) and a second fine ore screening and impurity removing mechanism (2). A first conveyor belt (3) is arranged at the feeding end of the first fine ore screening and impurity removing mechanism (1). A second conveyor belt (4) is arranged between the first discharging end of the first fine ore screening and impurity removing mechanism (1) and the feeding end of the second fine ore screening and impurity removing mechanism (2). A first collecting box (5) is arranged at the second discharging end of the first fine ore screening and impurity removing mechanism (1). A third conveyor belt (6) is arranged at the first discharging end of the second fine ore screening and impurity removing mechanism (2). A second collecting box (7) is arranged at the second discharging end of the second fine ore screening and impurity removing mechanism (2).

2. The ore screening and impurity removal device according to claim 1, characterized in that: The first fine ore screening and impurity removing mechanism (1) includes a first box body (11), a rotating roller (12), a first motor (13), a feeding hopper (14), a first discharging hopper (15) and a plurality of impurity removing components (16). The rotating roller (12) is rotatably arranged inside the first box body (11) through bearings. The first motor (13) is arranged outside the first box body (11), and the first motor (13) is connected to the rotating roller (12). The plurality of impurity removing components (16) are evenly distributed on the rotating roller (12). The impurity removing component (16) includes a plurality of evenly distributed tooth plates (16a). The tooth plates (16a) of the impurity removing component (16) are staggered with the tooth plates (16a) of the adjacent impurity removing components (16). The feeding hopper (14) and the first discharging hopper (15) are both communicated and arranged at the bottom of the first box body (11).

3. The ore screening and impurity removal device according to claim 1, characterized in that: The second fine ore screening and impurity removing mechanism (2) includes a second box body (21), a screen plate assembly (22), a bracket (23), a feeding bin (24), a second motor (25), a coupling (26) and a vibrator (27). The bracket (23) is arranged inside the second box body (21). The screen plate assembly (22) is fixedly arranged on the bracket (23). The feeding bin (24) is communicated and arranged at the bottom of the second box body (21). The second motor (25) is arranged outside the second box body (21), and the second motor (25) is connected to the screen plate assembly (22) through the coupling (26). The vibrator (27) is arranged on the second box body (21), and the vibrator (27) is connected to one end of the screen plate assembly (22) far from the coupling (26). The screen plate assembly (22) includes an inclined first screen plate (22a) and a second screen plate (22b). The second screen plate (22b) is arranged at the lower side of the first screen plate (22a). The first screen plate (22a) includes a plurality of spliced bar screen plates (22c). The second screen plate (22b) includes a plurality of spliced relaxation screen plates (22d).

4. The ore screening and impurity removal device according to claim 2, characterized in that: An inspection door (17) is arranged on the first box body (11).

5. The ore fines screening and impurity removal device according to claim 2, characterized in that: The distance between adjacent tooth plates (16a) of the same impurity removing component (16) is 30 - 80 mm.

6. The fine ore screening and impurity removal device according to claim 3, wherein: The invention also includes a first bracket (28) and a second bracket (29), wherein the second box (21) is fixedly arranged on the first bracket (28), the second motor (25) is fixedly arranged on the second bracket (29), and a shock-absorbing spring (210) is pre-compressed between the second box (21) and the first bracket (28).

7. The fine ore screening and impurity removal device according to claim 3, characterized in that: The feed end of the second box body (21) is connected to a feed hopper (211), the second discharge end of the second box body (21) is connected to a second discharge hopper (212), and a distributor (213) is provided in the feed hopper (211).

8. The fine ore screening and impurity removal device according to claim 3, wherein: A sealing cover (214) is provided on the top of the second box body (21).

9. The ore screening and impurity removal device according to claim 3, wherein: The relaxation screen plate (22d) is made of high-elasticity polyurethane material.

10. The fine ore screening and impurity removal device according to claim 3, characterized in that: The sieve hole diameters of the rod sieve plate (22c) and the sieve hole diameters of the relaxation sieve plate (22d) are both 30 to 80 mm.

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