Ore screening device

Abstract

An ore screening device comprises a screening unit and a box, a feeding port is formed in the middle of the top end of the box, a large ore discharging port and a small ore discharging port are formed in the front side and the rear side of the box respectively, the screening unit is transversely arranged between the feeding port and the large ore discharging port, and the large ore discharging port is higher than the small ore discharging port. A plurality of rotating shafts and a conveying belt driven by the rotating shafts to act are further arranged in the box body, one end of the conveying belt is located below the screening unit, the other end of the conveying belt inclines backwards and upwards and extends to the small ore discharging opening, a plurality of slag leaking holes are formed in the conveying belt, and a first spraying mechanism is further arranged on the front side of the small ore discharging opening in the box body; a stirring mechanism is arranged on the lower side of the conveying belt in the middle of the box. Through the special layout and the design of the stirring mechanism, the spraying mechanism and the conveying belt, effective removal of silt on the surface of the ore is achieved through combined action, and especially for small-size ore and silt with high viscosity, the silt removal effect is more comprehensively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ore processing equipment, in particular to an ore screening device. Background Art

[0002] After the ore is mined, a lot of mud and sand adheres to the surface, especially for the smaller ore, the mud and sand adheres to the surface most obviously. Due to these mud and sand, the ore needs to be screened and cleaned after it is mined to remove these mud and sand, so as to carry out subsequent processing of the ore. The screening device in the prior art mainly sprays and cleans the ore by setting a spray head. However, this method has some limitations, especially for the smaller ore, the mud and sand adhere to the surface more obviously, and the existing spraying method can only remove the mud and sand attached to the surface of the ore, and cannot effectively remove the mud and sand in the deeper layer.

[0003] For example, an ore crusher with screening function with application number CN202021919546.4, the equipment uses a pressurizer connected to a water tank to spray pressurized water through several water diversion holes on the water diversion plate, so as to flush the mud and sand on the surface of the screened ore on the conveyor belt. Although this design uses pressurized water for spraying, since the ore falls directly on the conveyor belt after screening and moves with the conveyor belt, this method can only spray the upper surface of the ore, while the lower surface of the ore cannot be sprayed, resulting in poor mud and sand removal effect. In addition, for some mud and sand with higher viscosity, since the ore moves with the conveyor belt and finally falls directly into the aggregate box, even if high-pressure spraying is used, the mud and sand removal effect is still poor. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides an ore screening device.

[0005] The technical solution of this utility model is as follows:

[0006] An ore screening device comprises a screening unit and a box body for screening large and small ores, a feeding port is provided in the middle of the top of the box body, and a large ore discharge port and a small ore discharge port are respectively provided on the front and rear sides, the screening unit is transversely arranged between the feeding port and the large ore discharge port, and the height of the large ore discharge port is higher than that of the small ore discharge port, a plurality of rotating shafts and conveyor belts driven by the rotating shafts are also arranged inside the box body, one end of the conveyor belt is located below the screening unit, and the other end is inclined upward and backward and extends to the small ore discharge port, and a plurality of slag leakage holes are arranged on the conveyor belt. Through the above structural design, the screening device needs to put water into the box body in advance before the screening work is carried out, and the water level can be adjusted. The ore is left at a position that covers 2 / 3 of the rear section of the conveyor belt, and then poured into the screening unit from the feed port. After screening by the screening unit, the ore is divided into two categories: large ore and small ore. The large ore is transported out from the large ore outlet, and the small ore falls down to a section at a lower position of the conveyor belt. At this time, the mud and sand attached to the surface of the small ore can be foamed under the action of water and run along the conveyor belt to the small ore outlet. In this process, the mud and sand gradually separate from the surface of the small ore. Finally, the small ore filters the water after passing through the 1 / 3 length section of the front section of the conveyor belt, and is finally transported out from the small ore outlet, thereby completing the separation of the small ore and the mud and sand.

[0007] As the core technical concept of the utility model, the screening unit of the screening device is arranged above the front side of the conveyor belt, so that the screened small ores fall on a section of the conveyor belt where the water level is lower, so that the small ores can be fully soaked, so that the mud and sand can be separated from the small ores, thereby improving the mud and sand removal effect; a stirring mechanism is also provided on the lower side of the conveyor belt in the middle of the box body of the screening device, that is, a stirring mechanism is arranged at a position before the conveyor belt is exposed to the water level plane, and the water is stirred and flows under the action of the stirring mechanism. When the ore on the conveyor belt passes through this position from the soaking position, the mud and sand attached to the small ore are impacted by the water flow and fall off the outer surface of the small ore, especially the part of the lower surface of the small ore that contacts the conveyor belt. The slag flowing through the leakage holes of the conveyor belt impacts the lower surface of the small ore, increasing the tumbling and friction of the small ore on the conveyor belt, so that the mud and sand on the lower surface of the small ore can also be knocked off by the impact of the water flow, further improving the mud and sand removal effect; the screening device is also provided with a first spray mechanism, and the first spray mechanism is arranged in front of the small ore discharge port on the box body, that is, it is arranged at the position where the small ore is exposed to the water surface. When the small ore is transported to the surface of the water, the mud and sand floating on the water surface may re-attach to the outer surface of the small ore, and the first spray mechanism can be used to wash away the mud and sand. Finally, the mud and sand remain at the bottom of the box body, and the small ore is cleanly transported out of the small ore discharge port, and the mud and sand removal effect is very good.

[0008] It should be noted that the above-mentioned screening unit can adopt a screening device in the prior art that can screen ore into large and small ores. The device includes a plurality of laterally arranged screening rollers, and a gap is left between two adjacent screening rollers to allow small pieces of ore to fall, thereby realizing the screening of large and small ores, wherein the large ore is transported out from the large ore discharge port, and the small ore and mud and sand fall from the gap. Its structure and working principle are the same, so no further description is given here.

[0009] As a further implementation:

[0010] The stirring mechanism includes a stirring roller arranged between two adjacent rotating shafts. The structure of the stirring roller can adopt the structure of a stirring roller in the prior art that can stir water to make it flow. It is arranged in the gap between the two rotating shafts. On the one hand, the stirring roller has sufficient installation position, and on the other hand, it reduces the obstruction of the rotating shaft after the water is stirred and flows, thereby improving the stirring effect. At the same time, the water flow can directly pass through the conveyor belt to contact the small ore without being obstructed by the rotating shaft.

[0011] At least three stirring rollers are provided to increase the water flow area and prolong the flushing time of the small ore during its operation. The stirring directions of two adjacent stirring rollers are opposite to further increase the water flow rate, increase the flow area, and further improve the sediment removal effect of the small ore.

[0012] The conveyor belt is a stainless steel mesh structure. The conveyor belt with stainless steel mesh structure is corrosion-resistant, high-strength, easy to maintain and has excellent filtering and drainage properties. It is an ideal choice for ore screening devices.

[0013] It also includes a separation box connected to the lower part of the box body, and the separation box is configured to filter the cleaning water in the box body and transport the filtered clean water back to the box body, thereby improving water utilization and reducing costs.

[0014] To improve the structural strength and stability of the screening device:

[0015] The interior of the stirring roller is a hollow structure. While maintaining sufficient strength and rigidity, the overall weight is effectively reduced, and the required rotation speed can be reached more quickly. This not only facilitates the movement and operation of the stirring roller, but also reduces the demand for stirring power. The reduced dead weight also means a reduced load on the structural components supporting the stirring shaft, which can increase the service life and reliability of these structural components and reduce potential failure risks, thereby improving work stability and efficiency.

[0016] The maximum vertical distance between the bottom of the screening roller and the upper side of the conveyor belt does not exceed 1m. When the vertical distance is controlled within 1m, small ores can fall from the screening roller to the conveyor belt more quickly. This design reduces the suspension time of the ore in the air, speeds up the overall screening speed, and improves production efficiency. At the same time, controlling the drop within 1m reduces the impact force when the ore falls, which helps protect the conveyor belt from excessive impact damage, prolongs its service life, and reduces downtime and maintenance time caused by conveyor belt damage.

[0017] To further improve the removal of sediment:

[0018] The lateral spacing between two adjacent rotating shafts is 0.5m-1m, in order to simultaneously ensure: reducing the sagging or bending of the conveyor belt during long-term operation, improving the stability and durability of the conveyor belt, reducing the downtime and maintenance time caused by conveyor belt failure, and improving overall work efficiency; providing necessary space for the installation of stirring mechanisms, etc.; extending the residence time of small ores on the conveyor belt to ensure that small ores have enough time to be flushed, thereby improving the sediment removal effect.

[0019] The screening device is also provided with a second spray mechanism, which is located at the rear side of the large ore discharge port on the box body. After the large ore is screened, the mud and sand on the surface are basically removed. The large ore is sprayed and cleaned by the second spray mechanism, which can improve the mud and sand removal effect of the large ore and obtain cleaner large ore.

[0020] The spraying mode of the two spraying mechanisms is high-pressure spraying, and the high-pressure spraying can generate a strong water flow, which can effectively remove the attachments on the surface of the ore, improve the effect of removing sediment, and save time and water resources.

[0021] The vertical distance between the top of the stirring roller near the small ore discharge port and the bottom of the small ore discharge port is not less than 0.5m. Retaining a vertical distance of at least 0.5m can provide sufficient space for the first spraying mechanism to carry out effective spraying, ensuring that the small ore has sufficient spraying time, and is also conducive to the removal of moisture and residual sediment, thereby enhancing the effect of sediment removal.

[0022] The beneficial effect of the ore screening device of the utility model is that, through the special layout of the screening unit, the unique design of the stirring mechanism, the spraying mechanism and the conveyor belt, the size classification of the ore and the effective removal of the mud and sand on the surface of the ore are achieved, especially for those small ores with obvious mud and sand attachment, and mud and sand with high viscosity, the mud and sand removal effect is improved more comprehensively, and the efficiency is high and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 This is a side view of an ore screening device of the utility model;

[0025] Figure 3 for Figure 1 A top view of

[0026] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Box body; 11. Large ore discharge port; 12. Small ore discharge port; 2. Screening unit; 21. Screening roller; 3. Small ore screening module; 31. Conveyor belt; 32. Rotating shaft; 33. Stirring mechanism; 34. Gear. DETAILED DESCRIPTION

[0029] This embodiment provides an ore screening device, combined with Figure 2 and Figure 3 The screening device includes a box body 1 and a screening unit 2 and a small ore screening module 3 therein, wherein a feed port is opened in the middle of the top of the box body 1, and a large ore discharge port 11 and a small ore discharge port 12 are opened on the front and rear sides respectively, and the height of the large ore discharge port 11 is higher than the height of the small ore discharge port 12. The small ore screening module 3 is located at the lower part of the box body 1 and is used for removing sediment from small ores. The screening unit 2 is located above the front side of the small ore screening module 3 at the lower part of the box body 1 and is used for screening large ores and small ores.

[0030] The structure of the screening unit 2 is combined with Figure 2 Specifically, the screening unit 2 is laterally arranged between the feed port and the large ore discharge port 11, and the screening unit 2 includes a plurality of screening rollers 21 which are arranged laterally and rotatably connected to the two side walls of the box body 1, and a plurality of stripping plates are provided in the gap in the length direction of the screening rollers 21, and the size of the gap is set to allow small pieces of ore to fall, and the gaps between two adjacent screening rollers 21 are arranged, and the size of the gaps between two adjacent screening rollers 21 is also set to allow small pieces of ore to fall, and the stripping plates on the two adjacent screening rollers 21 are also arranged in an alternating manner, wherein the large ore is transported out from the large ore discharge port 11, and the small ore and mud fall from the gap to the small ore screening module 3, thereby realizing the screening of large ore and small ore.

[0031] In this embodiment, a second spray mechanism is further provided at the rear side of the large ore discharge port 11 on the box body 1, wherein the large ore has its surface mud and sand basically removed after screening, and the large ore is sprayed and cleaned by the second spray mechanism, thereby improving the mud and sand removal effect of the large ore and obtaining a cleaner large ore.

[0032] The second spray mechanism has a high-pressure spray mode, which can generate a strong water flow, effectively remove the attachments on the surface of large ores, improve the effect of removing sediment, and save time and water resources.

[0033] For the structure of the small ore screening module 3, combined with Figure 3 Specifically, the small ore screening module 3 includes a plurality of rotating shafts 32 and a conveyor belt 31 driven thereby, a stirring mechanism 33 at the lower side of the conveyor belt 31 in the middle of the box body 1 , and a first spraying mechanism arranged at the front side of the small ore discharge port 12 on the box body 1 .

[0034] One end of the conveyor belt 31 is located below the screening unit 2, and the other end is inclined upward and backward and extends to the small ore discharge port 12. A number of slag holes are provided on the conveyor belt 31, and the conveyor belt 31 is a stainless steel mesh structure. The conveyor belt 31 with a stainless steel mesh structure is corrosion-resistant, high in strength, easy to maintain, and has excellent filtering and drainage properties, and is an ideal choice in ore screening devices.

[0035] The maximum vertical distance between the bottom of the screening roller 21 and the upper side of the conveyor belt 31 does not exceed 1m. When the vertical distance is controlled within 1m, small ores can fall from the screening roller 21 to the conveyor belt 31 more quickly. This design reduces the hovering time of the ore in the air, speeds up the overall screening speed, and improves production efficiency. At the same time, controlling the drop within 1m reduces the impact force of the ore when it falls, which helps to protect the conveyor belt 31 from excessive impact damage, extend its service life, and reduce downtime and maintenance time caused by damage to the conveyor belt 31.

[0036] The stirring mechanism 33 includes a stirring roller arranged between two adjacent rotating shafts 32, and the stirring roller is arranged in the gap between the two rotating shafts 32. On the one hand, the stirring roller has sufficient installation position, and on the other hand, it reduces the obstruction of the rotating shaft 32 after the water is stirred and flows, thereby improving the stirring effect. At the same time, the water flow can directly pass through the conveyor belt 31 to contact the small ore without being obstructed by the rotating shaft 32.

[0037] The interior of the stirring roller is a hollow structure. While maintaining sufficient strength and rigidity, the overall weight is effectively reduced, and the required rotation speed can be reached more quickly. This not only facilitates the movement and operation of the stirring roller, but also reduces the demand for stirring power. The reduced dead weight also means a reduced load on the structural components supporting the stirring shaft, which can increase the service life and reliability of these structural components and reduce potential failure risks, thereby improving work stability and efficiency.

[0038] There are three stirring rollers, which can increase the flow area of ​​water and extend the flushing time of small ore during the operation of small ore, so as to further increase the flow rate of water, increase the flow area, and further improve the sediment removal effect of small ore.

[0039] Combination Figure 1 The shaft ends of the three stirring rollers are all provided with gears 34, among which the gear 34 located at the front side is driven by a motor, so that the stirring directions of the two adjacent stirring rollers are opposite, further increasing the water flow area and improving the sediment removal effect of small ores.

[0040] The lateral spacing between two adjacent rotating shafts 32 is 0.5m-1m, so as to simultaneously ensure: reducing the sagging or bending of the conveyor belt 31 that may occur during long-term operation, improving the stability and durability of the conveyor belt 31, reducing the downtime and maintenance time caused by failure of the conveyor belt 31, and improving the overall work efficiency; providing necessary space for the installation of the stirring mechanism 33; extending the residence time of small ores on the conveyor belt 31, ensuring that the small ores have enough time to be flushed, thereby improving the sediment removal effect.

[0041] The vertical distance between the top of the stirring roller near the small ore discharge port 12 and the bottom of the small ore discharge port 12 is not less than 0.5m. Retaining a vertical distance of at least 0.5m can provide sufficient space for the first spraying mechanism to carry out effective spraying, ensuring that the small ore has sufficient spraying time, and is also beneficial to the removal of moisture and residual sediment, thereby enhancing the effect of removing sediment.

[0042] The first spray mechanism also uses high-pressure spraying as the spraying method.

[0043] In this embodiment, before the screening device performs screening, water needs to be released into the box body 1 in advance, and the water level can be kept at a position that covers 2 / 3 of the length of the rear section of the conveyor belt 31. Then, the ore is poured into the screening unit 2 from the feed port. After the ore is screened by the screening unit 2, it is divided into two categories: large ore and small ore. The large ore is transported out from the large ore discharge port 11, and is sprayed with high pressure by the second spray mechanism during the transportation process. The small ore falls downward on a section of the conveyor belt 31 at a lower position, that is, on a section of the conveyor belt 31 where the water level is lower, so that the small ore can be fully soaked, and the mud and sand can be separated from the small ore. Then, the small ore is transported to the middle position of the box body 1 along the conveyor belt 31, that is, at the stirring roller position before the conveyor belt 31 is exposed to the water level plane. Under the action of the three stirring rollers, the water is stirred and flows, and adheres to the small ore. The mud and sand on the stone are impacted by the water flow and fall off from the outer surface of the small ore, especially the part where the lower surface of the small ore contacts the conveyor belt 31. The water flows through the slag holes of the conveyor belt 31 and impacts the lower surface of the small ore, increasing the tumbling and friction of the small ore on the conveyor belt 31, so that the mud and sand on the lower surface of the small ore can also be impacted and fall off by the water flow. Then the conveyor belt 31 continues to run towards the small ore discharge port 12 with the small ore. The mud and sand gradually fall off the surface of the small ore in this process. When the small ore is transported to the surface of the water, the mud and sand floating on the water surface may re-attach to the outer surface of the small ore. At this time, the mud and sand can be washed away by the first spray mechanism. Finally, the mud and sand are left at the bottom of the box body 1, and the water is filtered after being sprayed by the first spray mechanism, and finally, they are cleanly transported out from the small ore discharge port 12, thereby completing the separation of the small ore and the mud and sand.

Claims

1. An ore screening device, comprising a screening unit (2), characterized in that: It also comprises a box body (1), wherein a material inlet is provided at the middle of the top of the box body (1), and a large ore discharge port (11) and a small ore discharge port (12) are respectively provided at the front and rear sides; The screening unit (2) is arranged transversely between the feed inlet and the large ore discharge port (11), and the height of the large ore discharge port (11) is higher than the height of the small ore discharge port (12); The box body (1) is further provided with a plurality of rotating shafts (32) and a conveyor belt (31) driven by the rotating shafts. One end of the conveyor belt (31) is located below the screening unit (2), and the other end is inclined upward and backward and extends to the small ore discharge port (12). The conveyor belt (31) is provided with a plurality of slag leakage holes. A stirring mechanism is also provided on the lower side of the conveyor belt (31) in the middle of the box body (1); It also comprises a first spraying mechanism, which is located in front of the small ore discharge port (12) on the box body (1).

2. An ore screening device according to claim 1, characterized in that: The stirring mechanism comprises a stirring roller (33) arranged between two adjacent rotating shafts (32).

3. An ore screening device as claimed in claim 2, characterized in that: At least three stirring rollers (33) are provided, and the stirring directions of two adjacent stirring rollers (33) are opposite.

4. An ore screening device according to claim 1, characterized in that: The lateral spacing between two adjacent rotating shafts (32) is 0.5m-1m.

5. An ore screening device as claimed in claim 3, characterized in that: The vertical distance between the top end of the stirring roller (33) close to the small ore discharge port (12) and the bottom end of the small ore discharge port (12) is not less than 0.5 m.

6. An ore screening device according to claim 1, characterized in that: The screening unit (2) comprises a plurality of screening rollers (21) arranged transversely, and the maximum vertical distance between the bottom of the screening roller (21) and the upper side of the conveyor belt (31) does not exceed 1 m.

7. An ore screening device according to any one of claims 1 to 6, characterized in that: The conveyor belt (31) is a stainless steel mesh structure.

8. An ore screening device as claimed in claim 7, characterized in that: It also includes a second spraying mechanism, which is located at the rear side of the large ore discharge port (11) on the box body (1).

9. An ore screening device as claimed in claim 8, characterized in that: The spraying mode of the two spraying mechanisms is high-pressure spraying.

10. An ore screening device according to claim 7, characterized in that: It also comprises a separation box which is in communication with the lower part of the box body (1), and the separation box is configured to filter the cleaning water in the box body (1) and transport the filtered clean water back to the box body (1).

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