A quartz sand impurity removal and classification device and method

Abstract

The present invention discloses a quartz sand impurity removal and grading device and method, including a cleaning and impurity removal box, a grinding and grading box, and a conveyor belt. At the top inside the cleaning and impurity removal box, there is a sprayer. Below the sprayer, a water blocking plate, a floating plate, and a filter plate are sequentially arranged in an intercepting manner. A number of flow holes are opened on both the water blocking plate and the floating plate, and the flow holes of the water blocking plate and the floating plate are all staggered in the vertical direction. The floating plate is in sliding contact with the inner wall of the cleaning and impurity removal box. On the top surface of the floating plate, there are a number of convex columns corresponding one by one to the flow holes of the water blocking plate. Magnetic attraction rings for mutual adsorption are arranged at the edge positions of the floating plate and the water blocking plate. A sewage discharge port is opened at the edge position of the filter plate in the cleaning and impurity removal box. When removing impurities and grading, this impurity removal and grading device can automatically scrape the dirt on the filter plate and discharge it when the filter plate is blocked, and automatically resume the filtering work. The whole process does not require shutdown, does not affect the cleaning process, does not require manual participation, and does not require any power equipment, which is very convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of quartz sand production equipment, and particularly relates to a device and method for removing impurities and classifying quartz sand. Background Art

[0002] Quartz sand is quartz particles obtained by crushing and processing quartz stone. Quartz stone is a non-metallic mineral, a hard, wear-resistant, and chemically stable silicate mineral, and its main mineral component is SiO2. In the process of preparing quartz sand from quartz stone, it mainly includes the previous steps of ore dressing, crushing and calcination, cleaning and impurity removal, and grinding and classification to obtain the initial product of quartz sand, as well as the subsequent purification steps (such as flotation and magnetic separation) for the initial product of quartz sand, and finally obtain the quartz sand finished product with the required quality. Among them, the more critical processes are impurity removal and classification, which have a greater impact on the quality of the finished product.

[0003] The existing quartz stone impurity removal and classification device has the following defects: when cleaning and removing impurities, it is necessary to wash and filter the soil, impurities, etc. attached to the bulk materials by spraying, and the filter screen is often easily blocked during filtration, and it needs to be cleaned after stopping the machine, which is troublesome to operate and affects work efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for removing impurities and classifying quartz sand, which solves the problems that the operation of dealing with the blockage of the filter screen during cleaning and impurity removal of the existing quartz stone impurity removal and classification device is troublesome and affects work efficiency, etc.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A device for removing impurities and classifying quartz sand includes a cleaning and impurity removal box, a drying box, a grinding and classification box, and a conveyor belt connecting the cleaning and impurity removal box, the drying box, and the grinding and classification box.

[0007] A sprayer is provided at the top inside the cleaning and impurity removal box. Below the sprayer, a water blocking plate, a floating plate, and a filter plate are sequentially intercepted. The conveyor belt horizontally passes between the sprayer and the water blocking plate. A number of flow holes are opened on both the water blocking plate and the floating plate, and the flow holes on the water blocking plate and the floating plate are all staggered in the vertical direction. The floating plate is in sliding contact with the inner wall of the cleaning and impurity removal box. A number of convex columns corresponding to the flow holes of the water blocking plate one by one are provided on the top surface of the floating plate. Magnetic suction rings for mutual adsorption are provided at the edge positions of the floating plate and the water blocking plate. A sewage outlet is opened at the edge position of the cleaning and impurity removal box at the filter plate.

[0008] Further improvement lies in that a water storage cavity is formed below the filter plate, and the water storage cavity is communicated with the sprayer through a pipeline with a water pump.

[0009] A further improvement is that the water blocking plate is movably suspended and installed in the cleaning and impurity removal box through a number of elastic parts, a threaded rod is provided at the center of the bottom surface of the water blocking plate, the threaded rod movably passes through the floating plate and the filter plate, a cleaning rod is provided on the upper surface of the filter plate, the cleaning rod is in a vortex curve segment structure, one end of the cleaning rod is connected to a sealing ring, the sealing ring is rotatably fitted with the inner wall of the cleaning and impurity removal box, and a flow port that coincides with or is staggered with the sewage outlet is opened on the sealing ring, and the other end of the cleaning rod is threadedly connected to the threaded rod through a threaded sleeve.

[0010] A further improvement is that a material drop port is provided at the top of the grinding and grading box, a coarse grinding roller and a fine grinding roller are provided below the material drop port, and grinding walls respectively matched with the coarse grinding roller and the fine grinding roller, and a motor driving the coarse grinding roller and the fine grinding roller to rotate synchronously, wherein the gap between the coarse grinding roller and the grinding wall is larger than the gap between the fine grinding roller and the grinding wall, at least two layers of vibrating screens are provided at the bottom of the grinding and grading box, the mesh openings of each layer of the vibrating screens gradually decrease from top to bottom, and a material discharge port is provided at the side of each layer of the vibrating screen in the grinding and grading box.

[0011] A further improvement is that the vibrating screens are all arranged at an angle, and the discharge ports are all located correspondingly at the bottom side of the vibrating screens.

[0012] The present invention also provides a quartz sand impurity removal and classification method, the method uses the above device, and the specific steps include:

[0013] S1. Start the conveyor belt to uniformly convey the quartz stone blocks through the cleaning and impurity removal box, start the sprayer to rinse the blocks that have passed through, and when the filter plate is not blocked, the flow port on the sealing ring is staggered with the sewage outlet to close the sewage outlet, and the sewage after flushing flows through the water blocking plate and the floating plate in turn and is filtered by the filter plate. When the filter plate is blocked by dirt and water accumulates above the filter plate, the floating plate gradually moves up from a low position as the water level rises, until it fits with the high-position water blocking plate under the mutual adsorption action of the magnetic suction ring, and after fitting, the convex column on the floating plate completely blocks the flow holes of the water blocking plate, so that the sewage after flushing stays above the water blocking plate, and the sewage gradually presses down the floating plate and the water blocking plate to stretch the elastic member, and the The water blocking plate drives the threaded rod to move downward, and the threaded rod drives the cleaning rod to rotate slowly in contact with the upper surface of the filter plate through the threaded sleeve. The cleaning rod pushes the dirt on the upper surface of the filter plate to move along the rotation direction of the cleaning rod while moving toward the edge of the filter plate. The cleaning rod drives the sealing ring to rotate at the same time until the flow port coincides with the sewage outlet, so that the sewage outlet is opened. At this time, the dirt is pushed to a position close to the flow port by the cleaning rod, and the dirt is discharged through the flow port and the sewage outlet with the water flow; when the weight of the sewage above the water blocking plate increases to cause the floating plate to separate from the water blocking plate, the floating plate falls to the initial low position, and the sewage above the water blocking plate then flows through the water blocking plate and the floating plate in sequence and is filtered by the filter plate, and the water blocking plate gradually moves up to the initial high position under the pullback of the elastic member;

[0014] S2. The conveyor belt transports the washed block materials through the drying oven for drying;

[0015] S3. The conveyor belt transports the dried block materials to the top of the grinding and classification box and drops them through the feeding opening. The motor drives the rough grinding roller and the fine grinding roller to rotate, and the block materials are rough ground and fine ground in sequence. The quartz sand obtained after grinding is gradually screened by each layer of vibrating screen mesh to obtain quartz sand products with different particle sizes, which are discharged through the discharge opening.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1) When the impurity removal and classification device performs cleaning and impurity removal, it can automatically scrape the dirt on the filter plate and discharge it when the filter plate is blocked, and automatically resume the filtering work. The whole process does not require shutdown, does not affect the cleaning process, does not require manual participation, and does not require any power equipment, which is very convenient.

[0018] (2) When the impurity removal and classification device performs grinding and classification, it can improve the grinding effect through two steps of rough grinding and fine grinding, and obtain quartz sand products with different particle sizes through gradual screening. Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the quartz stone impurity removal and classification device;

[0020] Figure 2 is the internal structural schematic diagram of the cleaning and impurity removal box;

[0021] Figure 3 is the position schematic diagram of the cleaning rod when the filter plate is not blocked;

[0022] Figure 4 is the position schematic diagram of the cleaning rod after rotation when the filter plate is blocked;

[0023] Figure 5 is the internal structural schematic diagram of the grinding and classification box;

[0024] In the figure: 1. Cleaning and impurity removal box; 2. Grinding and classification box; 3. Conveyor belt; 4. Sprayer; 5. Water blocking plate; 6. Floating plate; 7. Filter plate; 8. Flow hole; 9. Convex column; 10. Magnetic attraction ring; 11. Drainage port; 12. Water storage cavity; 13. Elastic member; 14. Threaded rod; 15. Cleaning rod; 16. Sealing ring; 17. Circulation port; 18. Threaded sleeve; 19. Feeding opening; 20. Rough grinding roller; 21. Fine grinding roller; 22. Grinding wall; 23. Motor; 24. Vibrating screen mesh; 25. Discharge opening. Detailed Embodiments

[0025] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Combined with Figures 1-5 As shown, a quartz sand impurity removal and classification device includes a cleaning and impurity removal tank 1, a drying tank 26, and a grinding and classification tank 2, as well as a conveyor belt 3 that sequentially connects the cleaning and impurity removal tank 1, the drying tank 26, and the grinding and classification tank 2.

[0027] At the top inside the cleaning and impurity removal tank 1, there is a sprayer 4. Below the sprayer 4, there are successively intercepted a water blocking plate 5, a floating plate 6, and a filter plate 7. The conveyor belt 3 horizontally passes through the space between the sprayer 4 and the water blocking plate 5. A number of flow holes 8 are opened on both the water blocking plate 5 and the floating plate 6. The size of the flow holes 8 is relatively large, and under normal conditions, it will not cause the accumulation of water flow. Moreover, the flow holes 8 of the water blocking plate 5 and the floating plate 6 are all staggered in the vertical direction. The floating plate 6 is in sliding contact with the inner wall of the cleaning and impurity removal tank 1 and can slide up and down freely. The floating plate 6 can be made of foam board material. On the top surface of the floating plate 6, there are a number of convex columns 9 that correspond one-to-one to the flow holes 8 of the water blocking plate 5. The convex columns 9 can be made of elastic rubber material and are adapted to the size of the flow holes 8 of the water blocking plate 5, and can block the flow holes 8 of the water blocking plate 5. Magnetic attraction rings 10 for mutual attraction are provided at the edge positions of the floating plate 6 and the water blocking plate 5. A sewage discharge port 11 is opened at the edge position of the cleaning and impurity removal tank 1 at the filter plate 7.

[0028] In the present invention, a water storage cavity 12 is formed below the filter plate 7. The water storage cavity 12 is connected to the sprayer 4 through a pipeline with a water pump for the recycling of the filtered clean water.

[0029] In the present invention, the water blocking plate 5 is movably suspended and installed inside the cleaning and impurity removal tank 1 through a number of elastic members 13 (such as springs). At the center of the bottom surface of the water blocking plate 5, there is a threaded rod 14. The lead angle of the threaded rod 14 is relatively large, for example, 75°. The threaded rod 14 movably passes through the floating plate 6 and the filter plate 7. Pay attention to the sealing when passing through the filter plate 7. On the upper surface of the filter plate 7, there is a cleaning rod 15. The cleaning rod 15 is in a spiral curve section structure, that is, it can provide a centrifugal direction thrust when rotating. One end of the cleaning rod 15 is connected with a sealing ring 16. The sealing ring 16 is rotationally fitted with the inner wall of the cleaning and impurity removal tank 1, and a through hole 17 that coincides with or is staggered from the sewage discharge port 11 is opened on the sealing ring 16. The other end of the cleaning rod 15 is threadedly connected to the threaded rod 14 through a threaded sleeve 18.

[0030] In the present invention, a blanking port 19 is provided at the top of the grinding and classification box 2. Below the blanking port 19, there are a coarse grinding roller 20, a fine grinding roller 21, a grinding wall 22 that cooperates with the coarse grinding roller 20 and the fine grinding roller 21 respectively, and a motor 23 that drives the coarse grinding roller 20 and the fine grinding roller 21 to rotate synchronously. Among them, the gap between the coarse grinding roller 20 and the grinding wall 22 is larger than the gap between the fine grinding roller 21 and the grinding wall 22. At least two layers of vibrating sieves 24 are provided at the bottom of the grinding and classification box 2, and the mesh holes of each layer of vibrating sieves 24 gradually decrease from top to bottom. The grinding and classification box 2 is provided with a discharge port 25 at the side position of each layer of vibrating sieves 24.

[0031] In the present invention, the vibrating sieves 24 are all inclined, and the discharge ports 25 are all correspondingly located at the bottommost side of the vibrating sieves 24.

[0032] The present invention also provides a method for removing impurities and classifying quartz sand. The method uses the above device, and the specific steps include:

[0033] S1. Start the conveyor belt 3 to uniformly convey the quartz stone blocks through the cleaning and impurity removal box 1. Start the sprayer 4 to wash the passing blocks to wash away impurities such as soil adhered to the surface of the blocks, and the washed blocks can continue to be conveyed out of the cleaning and impurity removal box 1 by the conveyor belt 3; when the filter plate 7 is not blocked, that is, in the initial state (refer to Figure 3) The flow port 17 on the sealing ring 16 is offset from the sewage discharge port 11, closing the sewage discharge port 11. The sewage-containing water after flushing flows through the water-blocking plate 5 and the floating plate 6 in sequence and is filtered by the filter plate 7, so that dirt such as soil remains on the upper surface of the filter plate 7, while the filtered clean water flows into the water storage cavity 12. As the filtration progresses, when the filter plate 7 is blocked by dirt and water accumulates above the filter plate 7, at this time, the floating plate 6 gradually moves upward from the low position as the water level of the accumulated water rises until it fits with the high-position water-blocking plate 5 under the mutual adsorption of the magnetic attraction rings 10. After fitting, the convex posts 9 on the floating plate 6 completely block the flow holes 8 of the water-blocking plate 5, preventing water from flowing through continuously, so that the sewage-containing water after flushing stays above the water-blocking plate 5. In this way, no water will flow into the space above the filter plate 7. And as the flushing progresses, the sewage-containing water gradually increases, and the sewage-containing water gradually presses down the floating plate 6 and the water-blocking plate 5, stretching the elastic member 13. The water-blocking plate 5 drives the threaded rod 14 to move downward. The downward movement of the threaded rod 14 drives the cleaning rod 15 to slowly rotate in contact with the upper surface of the filter plate 7 through the threaded sleeve 18. The cleaning rod 15 pushes the dirt on the upper surface of the filter plate 7 to move along the rotation direction of the cleaning rod 15 while moving toward the edge position of the filter plate 7. The cleaning rod 15 also drives the sealing ring 16 to rotate. During the rotation of the cleaning rod 15, most of the water above the filter plate 7 will pass through the filter plate 7 and fall, leaving only dirt and a small amount of water. When the rotation of the sealing ring 16 makes the flow port 17 coincide with the sewage discharge port 11, the rotation stops (by setting the length of the threaded rod 14 and the lead angle of the thread, when the bottom end of the threaded rod 14 abuts against the bottom surface of the water storage cavity 12 and will not continue to descend, the cleaning rod 15 just rotates to make the flow port 17 coincide with the sewage discharge port 11), opening the sewage discharge port 11 (refer to Figure 4 ). At this time, the cleaning rod 15 rotates nearly a full circle, and the dirt is pushed by the cleaning rod 15 to a position close to the flow port 17. Most of the dirt will be discharged through the flow port 17 and the sewage discharge port 11 along with the remaining water flow; when the weight of the sewage-containing water above the water-blocking plate 5 increases to cause the floating plate 6 to separate from the water-blocking plate 5, the floating plate 6 instantly drops to the initial low position, and the flow holes 8 on the water-blocking plate 5 open. The accumulated sewage-containing water above the water-blocking plate 5 then flows through the water-blocking plate 5 and the floating plate 6 in sequence and is filtered by the filter plate 7. The amount of accumulated sewage-containing water is reduced to the normal filtration state in a short time, and the water-blocking plate 5 gradually moves upward to the initial high position under the pulling-back of the elastic member 13. During the upward movement, the threaded rod 14 will drive the cleaning rod 15 to rotate in the reverse direction through the threaded sleeve 18 until it returns to the initial position. In the whole process, the flushing water is basically recycled, and only a small amount of water plays a role in assisting the flow and is discharged along with the dirt. At the same time, this also facilitates the transportation of the dirt and further harmless treatment.

[0034] It should be noted that the cleaning rod 15 rotates at a relatively slow speed, which basically does not disturb the dirt. Most of the dirt will be pushed along with the cleaning rod 15. Even if a small amount of dirt is disturbed, it will eventually be discharged from the sewage outlet 11 along with the remaining sewage. In addition, when the water blocking plate 5 starts to move upward under the pulling back of the elastic member 13, since the closing of the sewage outlet 11 requires a short process, a small amount of sewage-containing water will impact the filter plate 7 and then be discharged from the sewage outlet 11 during this process. This process can further play a role in cleaning the filter plate 7. After the sewage outlet 11 is completely closed, normal filtration can be carried out;

[0035] S2. The conveyor belt 3 conveys the washed block materials through the drying oven 26 for drying. Hot air drying or electric heating drying can be adopted in the drying oven 26;

[0036] S3. The conveyor belt 3 conveys the dried block materials to the top of the grinding and classification box 2 and drops them through the feeding port 19. The motor 23 drives the rough grinding roller 20 and the fine grinding roller 21 to rotate, and the block materials are rough ground and fine ground in sequence. The quartz sand obtained after grinding is gradually screened by each layer of vibrating screen 24 to obtain quartz sand products with different particle sizes, which are discharged from the discharge port 25.

[0037] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A quartz sand impurity removal and grading device, comprising a cleaning and impurity removal tank (1), a drying tank (26) and a grinding and grading tank (2), and a conveyor belt (3) sequentially connecting the cleaning and impurity removal tank (1), the drying tank (26) and the grinding and grading tank (2), characterized in that a sprayer (4) is provided at the inner top of the cleaning and impurity removal tank (1), a water blocking plate (5), a floating plate (6) and a filter plate (7) are sequentially intercepted below the sprayer (4), the conveyor belt (3) horizontally passes through between the sprayer (4) and the water blocking plate (5), a plurality of flow holes (8) are opened on both the water blocking plate (5) and the floating plate (6), and the flow holes (8) of the water blocking plate (5) and the floating plate (6) are all staggered in the vertical direction, the floating plate (6) is in sliding contact with the inner wall of the cleaning and impurity removal tank (1), a plurality of convex columns (9) corresponding to the flow holes (8) of the water blocking plate (5) one by one are provided on the top surface of the floating plate (6), magnetic attraction rings (10) for mutual adsorption are provided at the edge positions of the floating plate (6) and the water blocking plate (5), and a sewage discharge port (11) is opened at the edge position of the cleaning and impurity removal tank (1) at the filter plate (7); a water storage cavity (12) is formed below the filter plate (7), and the water storage cavity (12) is communicated with the sprayer (4) through a pipeline with a water pump; the water blocking plate (5) is movably suspended and installed in the cleaning and impurity removal tank (1) through a plurality of elastic members (13), a threaded rod (14) is provided at the center of the bottom surface of the water blocking plate (5), the threaded rod (14) movably passes through the floating plate (6) and the filter plate (7), a cleaning rod (15) is provided on the upper surface of the filter plate (7), the cleaning rod (15) is in a spiral curve section structure, one end of the cleaning rod (15) is connected with a sealing ring (16), the sealing ring (16) is rotationally fitted with the inner wall of the cleaning and impurity removal tank (1), and a communication port (17) coinciding with or staggered from the sewage discharge port (11) is opened on the sealing ring (16), and the other end of the cleaning rod (15) is threadedly connected with the threaded rod (14) through a threaded sleeve (18).

2. The quartz sand impurity removal and classification device according to claim 1, characterized in that, a blanking port (19) is opened at the top of the grinding and grading tank (2), a rough grinding roller (20) and a fine grinding roller (21) are provided below the blanking port (19), a grinding wall (22) respectively cooperating with the rough grinding roller (20) and the fine grinding roller (21), and a motor (23) for driving the rough grinding roller (20) and the fine grinding roller (21) to rotate synchronously, wherein the gap between the rough grinding roller (20) and the grinding wall (22) is greater than the gap between the fine grinding roller (21) and the grinding wall (22), at least two layers of vibrating sieves (24) are provided at the bottom of the grinding and grading tank (2), the mesh holes of each layer of vibrating sieve (24) gradually decrease from top to bottom, and a discharge port (25) is opened at the side position of each layer of vibrating sieve (24) in the grinding and grading tank (2).

3. The quartz sand impurity removal and classification device according to claim 2, characterized in that, the vibrating sieves (24) are all inclined, and the discharge ports (25) are all correspondingly located at the bottommost side of the vibrating sieves (24).

4. A method for removing impurities and classifying quartz sand, characterized in that, The method uses the device described in claim 3, and the specific steps include: S1. Start the conveyor belt (3) to evenly convey the quartz stone materials through the cleaning and impurity removal tank (1). Start the sprayer (4) to wash the passing materials. When the filter plate (7) is not blocked, the flow port (17) on the sealing ring (16) is staggered from the sewage discharge port (11), closing the sewage discharge port (11). The sewage-containing water after washing flows through the water blocking plate (5) and the floating plate (6) in sequence and is then filtered by the filter plate (7). When the filter plate (7) is blocked by dirt and water accumulates above the filter plate (7), the floating plate (6) gradually moves upward from the low position as the water level of the accumulated water rises until it fits against the high-position water blocking plate (5) under the mutual adsorption of the magnetic attraction rings (10). After fitting, the convex posts (9) on the floating plate (6) completely block the flow holes (8) of the water blocking plate (5), causing the sewage-containing water after washing to stay above the water blocking plate (5). And the sewage-containing water gradually presses down the floating plate (6) and the water blocking plate (5), stretching the elastic member (13). The water blocking plate (5) drives the threaded rod (14) to move downward. The threaded rod (14) drives the cleaning rod (15) to slowly rotate while fitting against the upper surface of the filter plate (7) through the threaded sleeve (18). The cleaning rod (15) pushes the dirt on the upper surface of the filter plate (7) to move along the rotation direction of the cleaning rod (15) and towards the edge position of the filter plate (7). The cleaning rod (15) also drives the sealing ring (16) to rotate until the flow port (17) coincides with the sewage discharge port (11), opening the sewage discharge port (11). At this time, the dirt is pushed by the cleaning rod (15) to a position close to the flow port (17), and the dirt is discharged through the flow port (17) and the sewage discharge port (11) along with the water flow. When the weight of the sewage-containing water above the water blocking plate (5) increases to cause the floating plate (6) to separate from the water blocking plate (5), the floating plate (6) drops to the initial low position. The sewage-containing water above the water blocking plate (5) then flows through the water blocking plate (5) and the floating plate (6) in sequence and is filtered by the filter plate (7). The water blocking plate (5) gradually moves upward to the initial high position under the pulling-back of the elastic member (13). S2. The conveyor belt (3) conveys the washed materials through the drying oven (26) for drying. S3. The conveyor belt (3) conveys the dried materials to the top of the grinding and classification tank (2) and drops them through the feeding port (19). The motor (23) drives the rough grinding roller (20) and the fine grinding roller (21) to rotate, successively rough grinding and fine grinding the materials. The quartz sand obtained after grinding is gradually screened by each layer of vibrating screen mesh (24) to obtain quartz sand products with different particle sizes, which are discharged through the discharge port (25).

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