A grinding device for producing fine aggregate of subgrade filler using tailings and its usage method

Abstract

The present invention relates to the technical field of tailings treatment, and specifically to a grinding device for producing fine aggregate of subgrade filler from tailings and its use method, including a grinding box; a fixed file plate is installed in the grinding box, and a lifting file plate slidably connected to the fixed file plate is slidably installed in the grinding box; the fixed file plate and the lifting file plate are inclined, and a plurality of discharge pores are provided between the fixed file plate and the lifting file plate; a file block cooperating with the fixed file plate and the lifting file plate is arranged in the grinding box; a grinding mechanism is arranged in the grinding box, and the grinding mechanism can drive the file block to displace in the grinding box; so as to change the cooperation state between the file block and the fixed file plate and the lifting file plate; a dredging mechanism is arranged in the grinding box, and the dredging mechanism can drive the lifting file plate to rise or fall during the operation of the grinding mechanism; since only a part of the tailings below the file block will be ground when the grinding mechanism is started, the overall starting load of the device is relatively small, thus prolonging the service life of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of tailings treatment, and specifically to a grinding device for producing fine aggregate of subgrade filler from tailings and its usage method. Background Art

[0002] The large-scale storage of tailings not only occupies a large amount of land resources, but also may cause environmental pollution. Using tailings to produce fine aggregate for subgrade can effectively reduce the storage of tailings, avoid environmental pollution, promote environmental protection, and using tailings as fine aggregate for subgrade can reduce engineering costs. Tailings themselves are industrial wastes, and using these wastes can save the cost of purchasing other materials, thereby reducing engineering costs.

[0003] However, tailings cannot be directly used as fine aggregate for subgrade and need to go through a series of processes, such as crushing, cleaning, and grinding processes; among them, the crushing process can break large-sized tailings blocks into relatively small-sized tailings blocks that are convenient for cleaning and grinding; and the grinding process is to process the tailings blocks with different sizes formed in the crushing process into tailings particles that generally meet the usage requirements. Common grinding devices include ball mills, crushers, etc.

[0004] Since the tailings blocks processed by crushers will become tailings powder and are not suitable as fine aggregate for subgrade, a ball mill is mostly used for grinding; a ball mill grinds the tailings blocks in the cylinder by driving the irregular movement of the relatively hard and heavy balls in the cylinder through the rotation of the cylinder; each time of grinding, a large amount of tailings blocks need to be loaded into the cylinder, and then start and grind. Since the overall load of the device will be very large after loading a large amount of tailings blocks, the starting load of the device will be very high. As time goes by, the failure rate of the device will increase, and the service life of the device will be reduced. Summary of the Invention

[0005] The purpose of the present invention is to provide a grinding device for producing fine aggregate of subgrade filler from tailings and its usage method to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A grinding device for producing fine aggregate of subgrade filler from tailings, including a grinding box;

[0008] An inlet channel is installed on the grinding box, and a hopper is installed below the grinding box;

[0009] A fixed file plate is installed in the grinding box, and a lifting file plate slidably connected to the fixed file plate is slidably installed in the grinding box; the fixed file plate and the lifting file plate are inclined, and a plurality of discharge pores are arranged between the fixed file plate and the lifting file plate; a file block cooperating with the fixed file plate and the lifting file plate is arranged in the grinding box;

[0010] A grinding mechanism is arranged in the grinding box, and the grinding mechanism can drive the file block to displace in the grinding box; so as to change the cooperation state between the file block and the fixed file plate and the lifting file plate;

[0011] A dredging mechanism is arranged in the grinding box, and the dredging mechanism can drive the lifting file plate to rise or fall during the operation of the grinding mechanism.

[0012] As a further scheme of the present invention: the discharge pore is composed of a first pore opened on the fixed file plate and a second pore opened on the lifting file plate.

[0013] As a further scheme of the present invention: the grinding mechanism includes a cylinder installed on the grinding box, and a push rod is slidably installed in the cylinder; a chute is opened on the file block, and a first slider slidably fitted with the chute is installed on the push rod; a fitting groove is opened on the grinding box, and a convex column slidably fitted with the fitting groove is installed on the file block.

[0014] As a further scheme of the present invention: the fitting groove includes an inclined notch, a horizontal notch, and a vertical notch, and two ends of the inclined notch are respectively communicated with one end of the horizontal notch and one end of the vertical notch, and the other end of the horizontal notch is communicated with the other end of the vertical notch.

[0015] As a further scheme of the present invention: the grinding mechanism further includes a first telescopic sleeve and a second telescopic column installed on the file block; a horizontal guide rod and an inclined guide rod are installed on the grinding box; a second slider is slidably fitted on the horizontal guide rod, and a first telescopic column slidably fitted with the first telescopic sleeve is installed on the second slider, a first spring is arranged in the first telescopic sleeve, and two ends of the first spring respectively abut against the first telescopic column and the first telescopic sleeve; an inclined slider is slidably fitted on the inclined guide rod, and a second telescopic sleeve slidably fitted with the second telescopic column is installed on the inclined slider, a second spring is wound around the second telescopic column, and two ends of the second spring respectively abut against the file block and the second telescopic column.

[0016] As a further scheme of the present invention: the inclination angle of the inclined guide rod is greater than the inclination angle of the fixed file plate and the lifting file plate.

[0017] As a further solution of the present invention: The lifting mechanism includes multiple groups of arc-shaped protrusions installed on the lifting file plate, and the arc-shaped protrusions are aligned with the horizontal notch.

[0018] As a further solution of the present invention: The surfaces of the file block that cooperate with the fixed file plate and the lifting file plate are inclined grinding surfaces. The part of the grinding surface close to the feeding channel is inclined, and the inclination angle is greater than the inclination angle of the grinding surface.

[0019] A method for using a grinding device for producing fine aggregate for subgrade filling from tailings as described above includes the following steps:

[0020] First step: Fix the feeding channel to the discharge port of the pre-treatment device (crushing device, cleaning and impurity removal device) for treating tailings; The treated tailings will enter the grinding box through the feeding channel and accumulate on the fixed file plate and the lifting file plate;

[0021] Second step: Start the grinding mechanism; The grinding mechanism will drive the file block to move. During the movement, the file block will cooperate with the fixed file plate and the lifting file plate to grind the tailings; After the tailings are ground, their size will become smaller, so that they can be discharged from the discharge pores and are received by the hopper;

[0022] Third step: The lifting mechanism will drive the lifting file plate to rise or fall during the operation of the grinding mechanism to remove the tailings blocking the discharge pores;

[0023] Fourth step: Remove the ground tailings in the hopper.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The grinding mechanism will drive the file block to move in the grinding box. During the movement, the file block will cooperate with the fixed file plate and the lifting file plate, that is, the file block will squeeze the tailings block and drive the tailings block to slide on the fixed file plate and the lifting file plate. During the sliding process, the tailings block will be squeezed and worn into relatively small-sized tailings particles; And during the displacement of the file block, the flow of the tailings block in the grinding box will be accelerated to facilitate the tailings particles with the required size originally mixed in the tailings block to enter the hopper through the discharge pores, thereby improving the grinding efficiency. And because the size of the file block is much smaller than the sizes of the fixed file plate and the lifting file plate, the effective grinding area per unit of the device is increased, thereby improving the grinding efficiency; Since only the part of the tailings below the file block will be ground when the grinding mechanism is started, the overall starting load of the device is relatively small, thereby prolonging the service life of the device and reducing the failure rate of the device; The dredging mechanism will drive the lifting file plate to rise to destroy the integrity of the discharge pores, so that the blocked tailings particles in the discharge pores will fall off and enter the hopper, thereby avoiding the blockage of the discharge pores, improving the discharge efficiency of the device, and at the same time improving the grinding efficiency of the device. Description of the Drawings

[0025] Figure 1 Structural schematic diagram of an embodiment of a grinding device for producing fine aggregate for subgrade filler using tailings.

[0026] Figure 2 Structural schematic diagram of another perspective of an embodiment of a grinding device for producing fine aggregate for subgrade filler using tailings.

[0027] Figure 3 For Figure 1 Structural schematic diagram in sectional view.

[0028] Figure 4 For Figure 3 Structural schematic diagram at position A in

[0029] Figure 5 For Figure 3 Structural schematic diagram at position B in

[0030] Figure 6 Structural schematic diagram of a file block, a fixed file plate and a lifting file plate in an embodiment of a grinding device for producing fine aggregate for subgrade filler using tailings.

[0031] Figure 7 Structural schematic diagram of a fitting groove in an embodiment of a grinding device for producing fine aggregate for subgrade filler using tailings.

[0032] Figure 8 Structural schematic diagram of a file block in an embodiment of a grinding device for producing fine aggregate for subgrade filler using tailings.

[0033] In the figure: 1. Grinding box; 101. Feeding channel; 102. Hopper; 103. Horizontal guide rod; 104. Inclined guide rod;

[0034] 2. Cylinder; 201. Thrust rod; 202. First slider;

[0035] 3. Fixed file plate; 301. First pore;

[0036] 4. Lifting file plate; 401. Second pore; 402. Arc protrusion;

[0037] 5. File block; 501. Slide groove; 502. Protruding column; 503. First telescopic sleeve; 504. Second telescopic column; 505. Grinding surface;

[0038] 6. First spring;

[0039] 7. Second spring;

[0040] 8. Second slider; 801. First telescopic column;

[0041] 9. Tilted slider; 901. Second telescopic sleeve;

[0042] 10. Fitting groove; 1001. Tilted notch; 1002. Horizontal notch; 1003. Vertical notch;

[0043] 11. Discharge pore. Detailed implementation manner

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] In addition, the elements in the present invention are referred to as "fixed to" or "disposed on" another element. It can be directly on another element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0046] Please refer to Figures 1 to 8 , in the embodiment of the present invention, a grinding device for producing fine aggregate of subgrade filler from tailings includes a grinding box 1;

[0047] An inlet channel 101 is installed on the grinding box 1, and a hopper 102 is installed below the grinding box 1;

[0048] A fixed file plate 3 is installed in the grinding box 1, and a lifting file plate 4 slidably connected to the fixed file plate 3 is slidably installed in the grinding box 1; the fixed file plate 3 and the lifting file plate 4 are inclined, and a plurality of discharge pores 11 are provided between the fixed file plate 3 and the lifting file plate 4; a file block 5 cooperating with the fixed file plate 3 and the lifting file plate 4 is provided in the grinding box 1;

[0049] A grinding mechanism is provided in the grinding box 1, and the grinding mechanism can drive the file block 5 to displace in the grinding box 1; so as to change the cooperation state between the file block 5 and the fixed file plate 3 and the lifting file plate 4;

[0050] A dredging mechanism is provided in the grinding box 1, and the dredging mechanism can drive the lifting file plate 4 to rise or fall during the operation of the grinding mechanism.

[0051] Taking the embodiment combined with all the features described in this application as an example, during use, the feed channel 101 is fixedly connected to the discharge port of the pre-treatment device (crushing device, cleaning device) for tailings treatment; the relatively large-sized tailings blocks after pre-treatment will enter the grinding box 1 through the feed channel 101 and accumulate on the fixed file plate 3 and the lifting file plate 4; the feed channel 101 is inclined, and as the tailings blocks in the grinding box 1 are consumed, new tailings blocks will be replenished into the grinding box 1 in real time.

[0052] Start the grinding mechanism, and the grinding mechanism will drive the file block 5 to move in the grinding box 1. During the movement, the file block 5 will cooperate with the fixed file plate 3 and the lifting file plate 4, that is, the tailings blocks will be extruded by the file block 5, and the tailings blocks will be driven to slide on the fixed file plate 3 and the lifting file plate 4. During the sliding process, the tailings blocks will be extruded and worn into relatively small-sized tailings particles; and during the displacement of the file block 5, the flow of the tailings blocks in the grinding box 1 will be accelerated, so as to facilitate the tailings particles with the required size originally mixed in the tailings blocks to pass through the discharge pore 11 into the hopper 102, thereby improving the grinding efficiency. And because the size of the file block 5 is much smaller than the sizes of the fixed file plate 3 and the lifting file plate 4, the effective grinding area per unit of the device is increased, thereby improving the grinding efficiency.

[0053] Since only a part of the tailings below the file block 5 will be ground when the grinding mechanism is started, the overall starting load of the device is relatively small, thereby extending the service life of the device and reducing the failure rate of the device.

[0054] After the grinding mechanism drives the file block 5 to cooperate with the fixed file plate 3 and the lifting file plate 4, it will drive the file block 5 to disengage from the fixed file plate 3 and the lifting file plate 4 to reset the file block 5, so as to grind another part of the tailings blocks. During the reset process, the grinding mechanism will drive the dredging mechanism to act, and the dredging mechanism will drive the lifting file plate 4 to rise to destroy the integrity of the discharge pore 11, so that the blocked tailings particles in the discharge pore 11 will fall off and enter the hopper 102, thereby avoiding the blockage of the discharge pore 11, improving the discharge efficiency of the device, and at the same time improving the grinding efficiency of the device.

[0055] In another embodiment of the present invention, the discharge pore 11 is composed of a first pore 301 opened on the fixed file plate 3 and a second pore 401 opened on the lifting file plate 4.

[0056] Taking the embodiment combining all the features recorded in the present application as an example, when in use, when the fixed file plate 3 and the lifting file plate 4 are located on the same inclined plane, the first pore 301 and the second pore 401 can interfere with each other and cooperate to form a discharge pore 11; during the movement of the file block 5, it will cooperate with the lifting file plate 4 and the fixed file plate 3 along a trajectory with the same inclination angle as the lifting file plate 4 and the fixed file plate 3. During the cooperation process, the tailings blocks will be ground into particles, so that they can be discharged from the discharge pore 11.

[0057] As the grinding proceeds, tailing particles slightly larger than the size of the discharge pore 11 will be squeezed into the discharge pore 11, causing the discharge pore 11 to be blocked, thereby reducing the discharge rate and grinding efficiency.

[0058] The dredging mechanism will drive the lifting file plate 4 to rise and fall to destroy the integrity of the discharge pore 11, even if the first pore 301 and the second pore 401 are misaligned and separated, so that the tailings particles blocked in the discharge pore 11 fall off and enter the hopper 102, thereby avoiding blockage of the discharge pore 11, thereby improving the discharge efficiency of the device, and also improving the grinding efficiency of the device.

[0059] According to another embodiment of the present invention, the grinding mechanism comprises a cylinder 2 installed on the grinding box 1, a push rod 201 is slidably installed in the cylinder 2; a slide groove 501 is provided on the file block 5, a first slider 202 slidably engaged with the slide groove 501 is installed on the push rod 201; an engaging groove 10 is provided on the grinding box 1, a raised column 502 slidably engaged with the engaging groove 10 is installed on the file block 5.

[0060] Taking the embodiment combining all the features recorded in the present application as an example, when in use, the cylinder 2 will drive the push rod 201 to extend outward and retract inward when it is in motion; during the process of the push rod 201 extending outward, the push rod 201 will move through the first slider 202 to drive the file block 5 to move, thereby driving the protruding column 502 to slide and cooperate with the interlocking groove 10, so that the file block 5 moves upward at an angle, and the inclination angle is consistent with the inclination angle of the fixed file plate 3 and the lifting file plate 4. During the process of the file block 5 tilting and rising, the distance between the file block 5 and the fixed file plate 3 and the lifting file plate 4 is the smallest, and during the process of the file block 5 tilting and rising, part of the tailings blocks will be driven to move synchronously on the fixed file plate 3 and the lifting file plate 4, so that they can be extruded and ground along with the tailings blocks; and during this process, the first slider 202 will slide in the slide groove 501.

[0061] After the push rod 201 drives the file block 5 to tilt upward to the maximum stroke, the cylinder 2 will drive the push rod 201 to retract inward. At this time, the push rod 201 will drive the file block 5 to move, and make the raised column 502 slide with the interlocking groove 10, so that the file block 5 can move to the initial position and complete the reset.

[0062] During the displacement of the file block 5, the flow of the tailing blocks in the grinding box 1 will be accelerated, so as to facilitate the qualified-sized tailing particles originally mixed in the tailing blocks to enter the hopper 102 through the discharge pores 11, thereby improving the grinding efficiency. Moreover, since the size of the file block 5 is much smaller than that of the fixed file plate 3 and the lifting file plate 4, the effective grinding area per unit of the device is increased, thereby improving the grinding efficiency.

[0063] Since only a part of the tailings below the file block 5 will be ground when the grinding mechanism is started, the overall starting load of the device is relatively small, thereby prolonging the service life of the device and reducing the failure rate of the device.

[0064] In another embodiment of the present invention, the fitting groove 10 includes an inclined notch 1001, a horizontal notch 1002, and a vertical notch 1003. The two ends of the inclined notch 1001 are respectively communicated with one end of the horizontal notch 1002 and one end of the vertical notch 1003, and the other end of the horizontal notch 1002 is communicated with the other end of the vertical notch 1003.

[0065] Taking the embodiment combined with all the features described in this application as an example, when in use, when the ejector rod 201 extends outwards, it will drive the file block 5 to displace, so that the convex column 502 slides in the inclined notch 1001. The inclination angle of the inclined notch 1001 is the same as the inclination angles of the fixed file plate 3 and the lifting file plate 4. Therefore, when the convex column 502 slides from the lower end point of the inclined notch 1001 (the connection point of the inclined notch 1001 and the vertical notch 1003) to the upper end point (the connection point of the inclined notch 1001 and the horizontal notch 1002), the file block 5 will move obliquely upwards parallel to the fixed file plate 3 and the lifting file plate 4.

[0066] When the ejector rod 201 contracts inwards, it will drive the file block 5 to reset, so that the convex column 502 slides from the upper end point of the inclined notch 1001 to the connection point of the horizontal notch 1002 and the vertical notch 1003 (sliding in the horizontal notch 1002). During this process, the file block 5 is horizontally displaced to directly above the initial position. Then the convex column 502 will slide in the vertical notch 1003 to the lower end point of the inclined notch 1001. During this process, the file block 5 is reset. And during the sliding of the convex column 502 in the vertical notch 1003, the file block 5 will extrude and clamp the tailing blocks below to facilitate subsequent grinding, thereby improving the grinding efficiency.

[0067] Another embodiment of the present invention, the grinding mechanism further includes a first telescopic sleeve 503 and a second telescopic column 504 installed on the file block 5; a horizontal guide rod 103 and an inclined guide rod 104 are installed on the grinding box 1; a second slider 8 is slidably fitted on the horizontal guide rod 103, and a first telescopic column 801 slidably fitted with the first telescopic sleeve 503 is installed on the second slider 8. A first spring 6 is arranged in the first telescopic sleeve 503, and two ends of the first spring 6 respectively abut against the first telescopic column 801 and the first telescopic sleeve 503; an inclined slider 9 is slidably fitted on the inclined guide rod 104, and a second telescopic sleeve 901 slidably fitted with the second telescopic column 504 is installed on the inclined slider 9. A second spring 7 is wound around the second telescopic column 504, and two ends of the second spring 7 respectively abut against the file block 5 and the second telescopic column 504.

[0068] Taking the embodiment in which all the features described in this application are combined as an example, when in use, the elastic force of the first spring 6 is perpendicular to the file block 5 and makes the file block 5 tend to displace downward. The elastic force of the second spring 7 is opposite to the direction of the first spring 6 and makes the file block 5 tend to displace upward.

[0069] When the convex column 502 is located at the lower end point of the inclined notch 1001, at this time, the sum of the elastic force of the first spring 6 and the gravity of the file block 5 is greater than the elastic force of the second spring 7. Therefore, during the process of the ejector rod 201 extending outwards, the convex column 502 can slide upward from the lower end point to the upper end point in the inclined notch 1001, the file block 5 will tilt upward, and the first telescopic column 801 will slide inwards in the first telescopic sleeve 503, thereby compressing the first spring 6, and the second slider 8 will slide horizontally on the horizontal guide rod 103; and the inclined slider 9 will slide upward from the lowest point on the inclined guide rod 104 along with the displacement of the file block 5, and the distance between the file block 5 and the inclined slider 9 will continuously increase, so that the second telescopic column 504 will slide inwards in the second telescopic sleeve 901, and the second spring 7 will be compressed; when the convex column 502 reaches the upper end point of the inclined notch 1001, the elastic force of the second spring 7 will be greater than the sum of the elastic force of the first spring 6 and the gravity of the file block 5. Therefore, the convex column 502 can slide in the horizontal notch 1002; and during the process of the convex column 502 sliding in the horizontal notch 1002 towards the vertical notch 1003, the inclined slider 9 will slide downward on the inclined guide rod 104. During the sliding process, the distance between the inclined slider 9 and the file block 5 will gradually decrease, causing the second telescopic column 504 to slide inwards in the second telescopic sleeve 901, making the elastic force of the second spring 7 gradually become smaller; while the elastic force of the first spring 6 remains the largest and unchanged.

[0070] When the convex column 502 enters the vertical notch 1003, the sum of the elastic force of the first spring 6 and the gravity of the file block 5 is much greater than the elastic force of the second spring 7. Then, the convex column 502 will slide in the vertical notch 1003 towards the lower end point of the inclined notch 1001 until it is reset. During the sliding process, the elastic force of the first spring 6 and the gravity of the file block 5 will drive the file block 5 to squeeze and impact the tailing blocks below, and clamp them to facilitate subsequent grinding.

[0071] During the displacement of the file block 5, it will accelerate the flow of the tailing blocks in the grinding box 1, so as to facilitate the tailing particles with qualified sizes originally mixed in the tailing blocks to enter the hopper 102 through the discharge pores 11, thereby improving the grinding efficiency. And because the size of the file block 5 is much smaller than the sizes of the fixed file plate 3 and the lifting file plate 4, the effective grinding area per unit of the device is increased, thereby improving the grinding efficiency.

[0072] Since only part of the tailings below the file block 5 will be ground when the grinding mechanism is started, the overall starting load of the device is relatively small, thereby prolonging the service life of the device and reducing the failure rate of the device.

[0073] In another embodiment of the present invention, the inclination angle of the inclined guide rod 104 is greater than the inclination angles of the fixed file plate 3 and the lifting file plate 4.

[0074] Taking the embodiment combined with all the features described in this application as an example, when in use, since the inclination angle of the inclined guide rod 104 is greater than the inclination angles of the fixed file plate 3 and the lifting file plate 4, that is, greater than the inclination angle of the inclined notch 1001, the rising or falling distance of the inclined slider 9 per unit time is greater than the rising or falling distance of the file block 5. As a result, the distance between the inclined slider 9 and the file block 5 will increase or decrease, thereby increasing or decreasing the elastic force of the second spring 7.

[0075] In another embodiment of the present invention, the dredging mechanism includes multiple groups of arc-shaped protrusions 402 installed on the lifting file plate 4, and the arc-shaped protrusions 402 are aligned with the horizontal notch 1002.

[0076] Taking the embodiment combined with all the features described in this application as an example, when in use, during the sliding process of the convex column 502 in the horizontal notch 1002, it will contact and squeeze the arc-shaped protrusions 402, causing them to yield upwards, thereby driving the lifting file plate 4 to displace upwards, so as to drive the second pore 401 to be misaligned with the first pore 301, and the tailing particles blocked in the discharge pores 11 will fall off. After the convex column 502 passes over the arc-shaped protrusions 402, under the action of the gravity of the lifting file plate 4, the lifting file plate 4 will slide down and reset, making the first pore 301 and the second pore 401 cooperate again.

[0077] The dredging mechanism will drive the lifting file plate 4 to rise, so as to destroy the integrity of the discharge pore 11, so that the blocked tailings particles in the discharge pore 11 will fall off and enter the hopper 102, thereby avoiding the blockage of the discharge pore 11, improving the discharge efficiency of the device, and also improving the grinding efficiency of the device.

[0078] In another embodiment of the present invention, the surface of the file block 5 that cooperates with the fixed file plate 3 and the lifting file plate 4 is an inclined grinding surface 505. The part of the grinding surface 505 close to the feed channel 101 is inclined, and the inclination angle is greater than the inclination angle of the grinding surface 505.

[0079] Taking the embodiment combined with all the features described in this application as an example, when in use, the grinding surface 505 is parallel to the fixed file plate 3 and the lifting file plate 4, and the surface is relatively rough, so as to increase the grinding efficiency. The part of the grinding surface 505 close to the feed channel 101 is inclined, which can increase the amount of tailings blocks entering the grinding surface 505 during the upward inclined movement of the file block 5, thereby increasing the grinding efficiency.

[0080] A method for using a grinding device for producing fine aggregate of subgrade filler from tailings as described above includes the following steps:

[0081] The first step: fixedly connect the feed channel 101 to the discharge port of the pre-treatment device (crushing device, cleaning and impurity removal device) for tailings; the treated tailings will enter the grinding box 1 through the feed channel 101 and accumulate on the fixed file plate 3 and the lifting file plate 4;

[0082] The second step: start the grinding mechanism; the grinding mechanism will drive the file block 5 to move, and during the movement, the file block 5 will cooperate with the fixed file plate 3 and the lifting file plate 4 to grind the tailings; the size of the tailings will become smaller after grinding, so that it can be discharged from the discharge pore 11 and is received by the hopper 102;

[0083] The third step: the dredging mechanism will drive the lifting file plate 4 to rise or fall during the operation of the grinding mechanism to remove the tailings blocking the discharge pore 11;

[0084] The fourth step: remove the tailings formed by grinding in the hopper 102.

[0085] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0086] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A grinding device for producing fine aggregate for roadbed filler using tailings, comprising a grinding box; It is characterized in that A feeding channel is installed on the grinding box, and a hopper is installed below the grinding box; A fixed file plate is installed in the grinding box, and a lifting file plate slidably connected to the fixed file plate is slidably installed in the grinding box; the fixed file plate and the lifting file plate are inclined, and multiple groups of discharge holes are arranged between the fixed file plate and the lifting file plate; a file block cooperating with the fixed file plate and the lifting file plate is arranged in the grinding box; A grinding mechanism is provided in the grinding box, and the grinding mechanism can drive the file block to move in the grinding box, so as to change the matching state between the file block and the fixed file plate and the lifting file plate; A dredging mechanism is provided in the grinding box, which can drive the lifting file plate to rise or fall during the operation of the grinding mechanism; The grinding mechanism comprises a cylinder mounted on the grinding box, a push rod is slidably mounted in the cylinder; a slide groove is provided on the file block, a first slider slidably engaged with the slide groove is installed on the push rod; an engaging groove is provided on the grinding box, a raised column slidably engaged with the engaging groove is installed on the file block; The engaging groove includes an inclined groove, a horizontal groove, and a vertical groove, and two ends of the inclined groove are respectively connected with one end of the horizontal groove and the vertical groove, and the other end of the horizontal groove is connected with the other end of the vertical groove; The dredging mechanism includes multiple groups of arc-shaped protrusions installed on the lifting file plate, and the arc-shaped protrusions are aligned with the horizontal slots; when the raised columns slide in the horizontal slots, they will collide with the arc-shaped protrusions and squeeze the arc-shaped protrusions, causing them to give way upward, thereby driving the lifting file plate to move upward, so as to drive the second pore in the discharge pore to be misaligned with the first pore, so that the tailings particles blocked in the discharge pores fall off.

2. A grinding device for producing roadbed filler fine aggregate using tailings according to claim 1, characterized in that: The material discharging aperture is composed of a first aperture provided on the fixed file plate and a second aperture provided on the lifting file plate.

3. A grinding device for producing roadbed filler fine aggregate using tailings according to claim 1, characterized in that: The grinding mechanism also includes a first telescopic sleeve and a second telescopic column installed on the file block; a horizontal guide rod and an inclined guide rod are installed on the grinding box; a second slider is slidably engaged on the horizontal guide rod, and the second slider is equipped with the first telescopic column slidably engaged with the first telescopic sleeve, a first spring is arranged in the first telescopic sleeve, and the two ends of the first spring respectively contact with the first telescopic column and the first telescopic sleeve; an inclined slider is slidably engaged on the inclined guide rod, and the inclined slider is equipped with the second telescopic sleeve slidably engaged with the second telescopic column, a second spring is wrapped around the second telescopic column, and the two ends of the second spring respectively contact with the file block and the second telescopic column.

4. A grinding device for producing roadbed filler fine aggregate using tailings according to claim 3, characterized in that: The inclination angle of the inclined guide rod is greater than the inclination angles of the fixed file plate and the lifting file plate.

5. The grinding device for producing roadbed filler fine aggregate using tailings according to claim 3 is characterized in that: The lifting mechanism comprises a plurality of arc-shaped protrusions mounted on the lifting file plate, and the arc-shaped protrusions are aligned with the horizontal notches.

6. A grinding device for producing roadbed filler fine aggregate using tailings according to claim 1, characterized in that: The surfaces of the file block that cooperate with the fixed file plate and the lifting file plate are inclined grinding surfaces, and the portion of the grinding surface close to the feed channel is inclined, and the inclination angle is greater than the inclination angle of the grinding surface.

7. A method for using the grinding device for producing roadbed filler fine aggregate using tailings as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: The first step: the feed channel is fixedly connected to the discharge port of the front device for processing tailings; the processed tailings will enter the grinding box through the feed channel and accumulate on the fixed file plate and the lifting file plate; Step 2: Start the grinding mechanism; the grinding mechanism will drive the file block to move, and during the movement, the file block will cooperate with the fixed file plate and the lifting file plate to grind the tailings; the tailings will become smaller in size after grinding, so that they can be discharged from the discharge pores and held by the hopper; Step 3: The lifting mechanism will drive the lifting file plate to rise or fall during the operation of the grinding mechanism to remove the tailings that block the discharge pores; Step 4: Remove the ground tailings from the hopper.

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