A quartz sand impurity removing and cleaning device

Abstract

The application discloses a quartz sand impurity removing and cleaning device and belongs to the technical field of quartz sand processing equipment, and specifically comprises a scrubbing cylinder, a scrubbing main shaft is rotationally connected in the scrubbing cylinder, a rotor scrubbing mechanism is arranged on the scrubbing main shaft, the rotor scrubbing mechanism comprises a dynamic sieve scattering cylinder, upper and lower ends of the dynamic sieve scattering cylinder are respectively provided with upper and lower impact rings, and a plurality of impact teeth are fixedly connected to the outer circles of the upper and lower impact rings; an annular feeding mechanism is arranged on the outside of the scrubbing cylinder, the annular feeding mechanism comprises a distribution pipeline, a feeding pipeline and circumferentially distributed branch pipelines are fixedly connected to the distribution pipeline, and a material spraying pipeline is fixedly connected to the branch pipelines; the application can effectively strip the iron film and clay agglomerates adhered to the surface of quartz sand particles, overcomes the problems of uneven local ore slurry concentration and flow field disorder caused by single-point feeding, prolongs the effective scrubbing residence time of the materials, makes the materials fully complete scrubbing before being discharged, and improves the consistency of the finished scrubbing quality.

Description

Technical Field

[0001] This invention belongs to the technical field of quartz sand processing equipment, specifically relating to a quartz sand impurity removal and cleaning device. Background Technology

[0002] In the quartz sand beneficiation process, the raw ore contains associated clay, mica, iron oxide films, and high-density heavy mineral impurities. These impurities need to be removed and sorted from the particle surface using scrubbing equipment. Existing vertical scrubbing equipment relies on an agitator inside the cylinder to stir the slurry and on the friction between the particles to complete the scrubbing operation.

[0003] Existing scrubbing equipment mainly relies on the agitator to force the slurry to rub against each other to remove impurities, which has the following defects: First, it lacks a dedicated impact and dispersing structure, and the impact and kneading strength between particles is insufficient, making it difficult to fully remove the iron film and clay agglomerates adhering to the surface of the quartz sand particles; Second, traditional equipment mostly adopts a single-point feeding structure, resulting in uneven distribution of slurry concentration within the scrubbing equipment and local flow field turbulence, which further reduces the scrubbing and sorting effect.

[0004] Therefore, a quartz sand cleaning and impurity removal device is provided to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a quartz sand cleaning and impurity removal device. This device effectively removes iron films and clay agglomerates adhering to the surface of quartz sand particles, improving the controllability of the finished quartz sand particle size. It overcomes the problems of uneven slurry concentration and turbulent flow field caused by single-point feeding. Furthermore, it extends the effective washing and residence time of the material, ensuring thorough washing before discharge, thus improving the consistency of the finished product's washing quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quartz sand impurity removal and cleaning device, comprising a scrubbing cylinder, a scrubbing main shaft rotatably connected inside the scrubbing cylinder, a rotor scrubbing mechanism provided on the scrubbing main shaft, the rotor scrubbing mechanism comprising a hollow cylindrical dynamic screening cylinder, the dynamic screening cylinder having multiple screening grooves circumferentially opened, an upper impact ring and a lower impact ring respectively assembled at the upper and lower ends of the dynamic screening cylinder, multiple impact teeth circumferentially fixedly connected to the outer circles of the upper and lower impact rings, multiple connecting frames circumferentially fixedly connected to the inner circles of the upper and lower impact rings, and the connecting frames being fixedly connected to the scrubbing main shaft;

[0007] An annular feeding mechanism is provided on the outside of the scrubbing cylinder. The annular feeding mechanism includes a distribution pipe fixedly sleeved on the outside of the scrubbing cylinder. A feeding pipe is fixedly connected to the distribution pipe. Multiple branch pipes are also distributed circumferentially on the distribution pipe. The feeding end of the branch pipe is connected to the distribution pipe. The discharge end of the branch pipe extends into the scrubbing cylinder and is fixedly connected to a spray pipe. The discharge end of the spray pipe is located at the middle position of the dynamic screening cylinder.

[0008] Preferably, the scrubbing main shaft is fixedly connected from top to bottom with an upper stirring blade, a middle stirring blade, and a lower stirring blade. The upper stirring blade, the middle stirring blade, and the lower stirring blade are phase-shifted and the blades are arranged at an inclined angle. The middle stirring blade is located in the middle of the dynamic screening cylinder.

[0009] Preferably, the inner wall of the dynamic screening cylinder is provided with multiple spiral ribs along the circumference, and the multiple spiral ribs extend along the axial direction of the dynamic screening cylinder; Each of the spiral ribs includes multiple segmented ribs, which are distributed sequentially along the axial direction of the dynamic screening cylinder. Each rib is located between adjacent screening troughs and is fixedly connected to the inner wall of the dynamic screening cylinder.

[0010] Preferably, wear-resistant sleeves are detachably connected to both sides of the screening trough, and the wear-resistant sleeves are arranged along the axial direction of the screening trough.

[0011] Preferably, the upper and lower outer sides of the dynamic screening cylinder are coaxially fixed with connecting flanges. The two connecting flanges are respectively fitted to the lower surface of the upper impact ring and the upper surface of the lower impact ring. The upper and lower impact rings are circumferentially arrayed with assembly holes adapted to fastening bolts. One end of the fastening bolt passes through the upper impact ring, the connecting flange and the lower impact ring in sequence and is threaded with a fastening nut.

[0012] Preferably, radial limiting grooves are provided on the opposite sides of the upper and lower impact rings, and radial limiting steps are fitted into the radial limiting grooves. The two radial limiting steps are respectively fixedly connected to the opposite sides of the two connecting flanges for radial limiting of the dynamic screening cylinder. Multiple circumferentially distributed keyways are provided on the opposite sides of the two connecting flanges. The circumferential keyways are opened radially along the connecting flanges. Circumferential flat keys are fitted into the circumferential keyways. Two circumferential flat keys are respectively fixedly connected to the opposite sides of the upper and lower impact rings for circumferential positioning of the dynamic screening cylinder.

[0013] Preferably, the impact tooth is a trapezoidal tooth structure with a wide root and a narrow tip; the impact tooth of the upper impact ring has a downwardly inclined first guide slope on its material-facing surface, and the impact tooth of the lower impact ring has an upwardly inclined second guide slope on its material-facing surface, and the impact teeth on the upper impact ring and the impact teeth on the lower impact ring are circumferentially misaligned.

[0014] Preferably, the branch pipe includes an inlet section and an outlet section. The inlet end of the inlet section is connected to the distribution pipe, and the outlet end of the outlet section is connected to the inlet end of the spray pipe. Locking flanges are coaxially fixedly fitted on the outer sides of the opposite ends of the inlet and outlet sections. A flow regulating plate is sandwiched between the two locking flanges. A flow hole is opened in the middle of the flow regulating plate, and a locking hole adapted to the locking bolt is opened circumferentially on the edge of the flow regulating plate. The locking bolt passes through the two locking flanges and the locking hole of the flow regulating plate to achieve clamping assembly of the three.

[0015] Preferably, a fixed flange is coaxially fixedly fitted on the outer side of the feed end of the spraying pipe and the outer side of the discharge end of the distribution pipe. The two fixed flanges are locked together by fixing bolts. The discharge end of the spraying pipe is arranged at a downward inclination, and the center line of the discharge end of the spraying pipe is parallel to the tangent of the outer circle of the dynamic screening cylinder.

[0016] Preferably, a drive mechanism is provided at the top of the scrubbing drum. The drive mechanism includes a bracket fixedly connected to the top of the scrubbing drum, a fixed seat fixedly connected to the bracket, a rotating hole for the scrubbing spindle to pass through in the middle of the fixed seat, the scrubbing spindle being rotatably connected to the fixed seat, a support column being rotatably sleeved on the scrubbing spindle above the fixed seat, the support column being fixedly connected to the fixed seat, and a drive motor for driving the scrubbing spindle to rotate is also fixedly connected to the bracket.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features a rotor scrubbing mechanism that rotates at high speed with the main shaft. The upper and lower impact rings impact and disperse the slurry, and the friction between particles and between particles and components effectively removes the iron film and clay agglomerates adhering to the surface of the quartz sand particles. The long strip screening trough on the dynamic screening cylinder not only realizes the flow and exchange of slurry inside and outside the cylinder, but also intercepts coarse particles and mud clumps, allowing large particles that have not been fully scrubbed to continue to be processed in the outer ring cavity, thus improving the controllability of the finished product particle size.

[0018] 2. This invention uses a polygonal annular distribution pipe to achieve circumferential multi-point tangential feeding, ensuring uniform slurry distribution within the scrubbing cylinder and overcoming the problems of uneven slurry concentration and turbulent flow field caused by single-point feeding. The hexagonal cylinder can disrupt the complete circumferential flow within the cylinder, suppress short-circuit flow of the slurry, extend the effective scrubbing residence time of the material, and ensure that the material is fully scrubbed before being discharged, thereby improving the consistency of the finished product scrubbing quality.

[0019] 3. The present invention employs impact teeth with a downwardly inclined first guide slope on the upper impact ring and impact teeth with an upwardly inclined second guide slope on the lower impact ring, and the upper and lower impact teeth are arranged in a circumferentially staggered manner, which causes the slurry to form an up-and-down reciprocating rolling flow. Combined with the spiral ribs on the inner wall of the dynamic screening cylinder and the multi-layer phase-staggered stirring paddle, the multiple structures work together to disturb the slurry, further enhancing the particle impact friction effect and improving the impurity stripping efficiency. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the annular feeding mechanism of the present invention; Figure 4 This is a three-dimensional exploded view of the branch pipe structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the rotor cleaning mechanism of the present invention; Figure 6 This is a schematic diagram of the main cross-sectional structure of the rotor cleaning mechanism of the present invention; Figure 7 This is a schematic diagram of the impact ring structure from below in this invention; Figure 8 This is a top view of the dynamic screening cylinder structure of the present invention; In the diagram: 1. Scrubbing cylinder; 2. Scrubbing main shaft; 3. Upper agitator; 4. Middle agitator; 5. Lower agitator; 6. Rotor scrubbing mechanism; 61. Dynamic screening cylinder; 62. Screening trough; 63. Upper impact ring; 64. Lower impact ring; 65. Impact teeth; 66. Connecting frame; 67. Spiral rib; 68. Wear-resistant sleeve; 69. Connecting flange; 610. Fastening bolts; 611. Radial limiting groove; 612. Radial limiting. 613. Step; 614. Circumferential keyway; 615. Circumferential flat key; 616. First guide slope; 617. Second guide slope; 7. Annular feeding mechanism; 71. Distribution pipe; 72. Feed pipe; 73. Branch pipe; 74. Spraying pipe; 75. Locking flange; 76. Flow regulating plate; 77. Fixed flange; 8. Drive mechanism; 81. Bracket; 82. Fixed seat; 83. Support column; 84. Drive motor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figure 1-8 This embodiment provides the following technical solution: a quartz sand impurity removal and cleaning device, including a scrubbing cylinder 1, which is a vertical regular hexagonal scrubbing cylinder with an open top. The main body of the scrubbing cylinder 1 is welded from Q235 steel plate. The inner side of the cylinder is equipped with a wear-resistant liner plate that can be detachably installed. The liner plate is made of high-chromium wear-resistant steel plate to resist long-term scouring and wear of the slurry. The liner plate is fastened with bolts and can be replaced individually after wear. The inner wall of the hexagonal cylinder can break the complete circumferential flow formed by the rotation of the slurry, suppress the short-circuit flow of the material, prolong the effective residence time of the slurry in the cylinder, and improve the stability of scrubbing and sorting. A slag discharge pipe is set at the bottom of the scrubbing cylinder 1 and is connected to the inside of the scrubbing cylinder 1. A slag discharge valve is fixedly connected to the slag discharge pipe for sedimentation, collection and discharge of heavy mineral impurities. A top overflow port is set at the top opening of the scrubbing cylinder 1. The qualified quartz sand slurry after scrubbing, along with light impurities such as clay and mica, overflows and is discharged from the top overflow port.

[0023] A drive mechanism 8 is installed at the top of the scrubbing cylinder 1. The drive mechanism 8 includes a bracket 81 fixedly connected to the top of the scrubbing cylinder 1. A fixed seat 82 is fixedly connected to the middle of the bracket 81. A scrubbing main shaft 2 is installed through the middle of the fixed seat 82. The scrubbing main shaft 2 is rotatably connected to the fixed seat 82 through a bearing. A combined packing shaft seal (stuffing gland type soft packing dynamic seal) is installed at the through position between the scrubbing main shaft 2 and the fixed seat 82 to prevent the slurry of the scrubbing cylinder 1 from leaking outward along the gap of the scrubbing main shaft 2. A rubber sealing gasket is installed at the assembly position of the branch pipe 73 and the opening of the scrubbing cylinder 1. Rubber sealing gaskets are installed at the flange mating positions to prevent slurry leakage.

[0024] The lower end of the scrubbing spindle 2 extends into the scrubbing cylinder 1. A sleeve-type support column 83 is fixedly connected to the upper end face of the fixed seat 82. The sleeve-type support column 83 is a hollow sleeve structure, which is sleeved on the outside of the scrubbing spindle 2. The sleeve is also equipped with bearings. Together with the bearings inside the fixed seat 82, it forms a double rotation support structure on the upper part of the spindle, which effectively reduces the radial runout of the spindle under high-speed rotation conditions. A drive motor 84 is fixedly installed on the bracket 81. The output end of the drive motor 84 is set vertically upward. Both the output end of the drive motor 84 and the upper end of the scrubbing spindle 2 are fixedly sleeved with pulleys. The two pulleys are connected by a transmission belt. The drive motor 84 drives the scrubbing spindle 2 to rotate continuously around its own vertical axis.

[0025] The outer wall of the scrubbing cylinder 1 is equipped with an annular feeding mechanism 7. The annular feeding mechanism 7 includes a distribution pipe 71, which is a polygonal annular pipe adapted to the shape of the hexagonal cylinder. A feed pipe 72 is welded to the outside of the distribution pipe 71. The slurry is fed into the distribution pipe 71 through the feed pipe 72. Multiple branch pipes 73 are evenly arranged circumferentially on the inner side of the distribution pipe 71. The branch pipes 73 extend vertically through the plate surface of the scrubbing cylinder 1 and into the interior of the scrubbing cylinder 1. Each branch pipe 73 is divided into an outer feed section and an inner discharge section. The outer end of the material section is connected to the distribution pipe 71. Locking flanges 75 are welded to the inner end of the feed section and the outer end of the discharge section respectively. A flow regulating plate 76 is clamped between the two sets of locking flanges 75. A flow hole is opened in the center of the flow regulating plate 76 and a locking hole is opened on the edge. The locking bolt passes through the locking holes of the locking flanges 75 on both sides and the flow regulating plate 76 to complete the clamping assembly. By loosening the locking bolt, flow regulating plates 76 with different hole diameters can be replaced, thereby adjusting the feed flow of each branch pipe 73 to adapt to different processing capacities and different slurry concentrations in production conditions.

[0026] The material distribution pipe 71 is fixed to the outer wall of the scrubbing drum 1 by multiple support components. Each support component includes two symmetrically arranged arc-shaped clamps. The two arc-shaped clamps are fixed to the outer wall of the material distribution pipe 71 by clamping. Both ends of the two arc-shaped clamps are fixedly connected by bolts. A fixing frame is welded and fixed on one of the arc-shaped clamps. The other end of the fixing frame is fixedly connected to the scrubbing drum 1 by bolts.

[0027] The inner end of the discharge section of the branch pipe 73 is connected to the spray pipe 74. The end of the discharge section and the inlet end of the spray pipe 74 are respectively welded with fixed flanges 77. The two sets of fixed flanges 77 are locked together by fixed bolts. The discharge end of the spray pipe 74 is aligned with the middle height position of the dynamic screening cylinder 61. The discharge end of the spray pipe 74 is arranged at a downward angle. The center line of the discharge end is parallel to the outer circle tangent of the dynamic screening cylinder 61. The slurry is sprayed into the outer annular cavity between the inner wall of the hexagonal scrubbing cylinder 1 and the dynamic screening cylinder 61 in a tangential downward posture. It matches the swirling flow field formed by the rotor rotation to achieve uniform slurry distribution around the cylinder and avoid the problem of uneven local concentration caused by single-point feeding.

[0028] Example 2 like Figure 3 and Figure 5-8 As shown, a rotor scrubbing mechanism 6 is assembled at the middle position of the scrubbing main shaft 2. The rotor scrubbing mechanism 6 includes a dynamic screening cylinder 61, which is a vertically arranged hollow cylindrical structure. The dynamic screening cylinder 61 is coaxially arranged with the scrubbing main shaft 2. An annular outer cavity is formed between the outer circle of the dynamic screening cylinder 61 and the inner wall of the hexagonal scrubbing cylinder 1. Multiple long strip screening grooves 62 are opened circumferentially on the cylinder wall of the dynamic screening cylinder 61. The screening grooves 62 extend along the axial direction of the cylinder body. Part of the slurry remains on the outside of the dynamic screening cylinder 61 and is impacted and kneaded by the impact teeth 65, while part of it can pass through the screening grooves 62 and enter the dynamic screening cylinder 61. The inner cavity allows the slurry to flow from the outside to the inside. The width of the screening tank 62 limits the particle size of the material. Coarse particles are intercepted on the outside of the cylinder and continuously impacted and dispersed, while only qualified particles can enter the inner cavity. During the process of passing through the tank opening, the particles rub against the tank wall, further stripping away mud and iron film impurities from the particle surface. When the dynamic screening cylinder 61 rotates at high speed, the screening tank 62 alternately sweeps across the slurry, creating shear disturbances on the slurry, breaking the fluid boundary stagnation, and promoting full exchange and mixing of the slurry inside and outside the cylinder. The stripped fine impurities pass through the screening tank 62 with the slurry and enter the inner cavity, and are discharged upward with the overflow, reducing the risk of secondary adsorption of impurities.

[0029] In some embodiments, the dynamic screening cylinder 61 is made of Q355 wear-resistant steel plate rolled and welded; the upper impact ring 63, lower impact ring 64, impact teeth 65, connecting frame 66, and various connecting flanges 69 are all made of wear-resistant carbon steel, and the working surface of the impact teeth 65 can be treated with a wear-resistant overlay to improve impact resistance and wear resistance.

[0030] Wear-resistant sleeves 68 are detachably mounted on both sides of the screening trough 62 via countersunk bolts. The wear-resistant sleeves 68 are made of high wear-resistant polyurethane material and are also arranged along the axial direction of the screening trough 62. When the wear-resistant sleeves 68 are worn by long-term erosion, only the countersunk bolts need to be removed to replace the wear-resistant sleeves 68 individually, without having to replace the entire dynamic screening cylinder 61, thus reducing spare parts consumption and maintenance time. The upper and lower outer circumferences of the dynamic screening cylinder 61 are respectively welded and fixed with connecting flanges 69. Both sets of connecting flanges 69 are coaxially arranged with the dynamic screening cylinder 61. The upper surface of the upper connecting flange 69 is in contact with the lower surface of the upper impact ring 63, and the lower surface of the lower connecting flange 69 is in contact with the upper surface of the lower impact ring 64. Both the upper impact ring 63 and the lower impact ring 64 are annular components, and they are coaxial with the dynamic screening cylinder 61. Multiple sets of radial connecting frames 66 are evenly arranged circumferentially on the inner circumference of the upper impact ring 63 and the lower impact ring 64. The inner end of the connecting frame 66 is welded and fixed to the outer wall of the scrubbing main shaft 2. The drive motor 84 outputs torque to drive the scrubbing main shaft 2 to rotate. The scrubbing main shaft 2 drives the upper impact ring 63 and the lower impact ring 64 to rotate synchronously through the connecting frame 66. The connecting flange 69 drives the dynamic screening cylinder 61 to rotate at high speed.

[0031] The upper impact ring 63 and the upper connecting flange 69, as well as the lower impact ring 64 and the lower connecting flange 69, are provided with circumferentially arrayed and mutually compatible assembly holes. The lower end of the fastening bolt 610 passes through the assembly holes on the upper impact ring 63, the upper connecting flange 69, the lower impact ring 64, and the lower connecting flange 69 in sequence and is threaded with a fastening nut. Through the fastening bolt 610 and the fastening nut, the upper impact ring 63, the lower impact ring 64, and the dynamic screening cylinder 61 can be tightly connected together, making them a rotating whole.

[0032] In some embodiments, a fastening nut may be threaded onto the fastening bolt 610 below the upper connecting flange 69, and the fastening nut abuts against the lower surface of the upper connecting flange 69, thereby further improving the stability of the connection between the upper impact ring 63, the lower impact ring 64 and the dynamic screening cylinder 61.

[0033] A radial limiting groove 611 is formed on the downward-facing end face of the upper impact ring 63, and a radial limiting step 612 is welded to the upward-facing end face of the upper connecting flange 69. The radial limiting step 612 is inserted into the radial limiting groove 611 to achieve radial positioning between the upper impact ring 63 and the upper connecting flange 69, thus limiting the radial offset between the two. A radial limiting groove 611 is formed on the upward-facing end face of the lower impact ring 64, and a corresponding radial limiting step 612 is welded to the downward-facing end face of the lower connecting flange 69. The two parts engage to complete the lower radial positioning, which can limit the radial direction of the upper impact ring 63, the lower impact ring 64 and the dynamic screening cylinder 61, thereby improving the stability of the connection between the three.

[0034] Multiple circumferential keyways 613 are radially distributed on the end face of the connecting flange 69 away from the middle of the dynamic screening cylinder 61. A circumferential flat key 614 is fixed on the lower side of the upper impact ring 63 and is inserted into the circumferential keyway 613 radially. Similarly, a circumferential flat key 614 is fixed on the upper side of the lower impact ring 64 and inserted into the circumferential keyway 613 of the lower connecting flange 69. The torque is transmitted by the circumferential flat key 614 to avoid circumferential slippage between the misaligned impact ring and the connecting flange 69 during high-speed rotation.

[0035] Multiple impact teeth 65 are fixed circumferentially on the outer circumference of the upper impact ring 63 and the lower impact ring 64. The two sets of impact teeth 65 are staggered circumferentially. The impact teeth 65 adopt a trapezoidal structure with a wide root and a narrow tip. The material-facing surface of the upper impact tooth 65 is provided with a downward-sloping first guide slope 615, and the material-facing surface of the lower impact tooth 65 is provided with an upward-sloping second guide slope 616. The two sets of impact teeth 65 are staggered circumferentially. After the slurry impacts the surface of the impact teeth 65 at high speed, part of the slurry is folded back downward along the upper guide slope, and part of the slurry is folded back upward along the lower guide slope, thus forming a slurry flow that tumbles up and down on the outside of the dynamic screening cylinder 61, which enhances the impact and kneading effect between particles.

[0036] Multiple spiral ribs 67 are arranged circumferentially on the inner wall of the dynamic screening cylinder 61. The spiral ribs 67 extend along the axial direction of the cylinder as a whole. The spiral ribs 67 are composed of multiple segmented rib plates spliced ​​together. The segmented rib plates are welded and fixed to the inner wall of the dynamic screening cylinder 61. Each segmented rib plate is arranged between two adjacent screening troughs 62, so as not to block the material passage of the screening trough 62. When the dynamic screening cylinder 61 rotates at high speed with the main shaft, the segmented rib plates agitate the slurry in the inner cavity of the dynamic screening cylinder 61, forming a spiral disturbance and deflection guiding effect, further enhancing the scrubbing flow field inside the dynamic screening cylinder 61.

[0037] The upper agitator 3, the middle agitator 4, and the lower agitator 5 are welded and fixed to the main shaft 2 from top to bottom. The three agitators are staggered in phase and the blades themselves have an inclined installation angle. The middle agitator 4 is arranged in the middle of the inner cavity of the dynamic screening cylinder 61. The maximum gyration outer diameter of the middle agitator 4 is smaller than the inner diameter of the dynamic screening cylinder 61. When the agitator rotates, it will not interfere with or collide with the inner wall of the dynamic screening cylinder 61. The three agitators work together to stir the slurry in the cylinder, further enhancing the friction and kneading effect between the quartz sand particles.

[0038] The working principle of the present invention is as follows: When the machine is started, the drive motor 84 is started first to drive the rotor scrubbing mechanism 6 to rotate, and then the slurry is fed in. The quartz sand slurry to be processed enters the polygonal annular distribution pipe 71 through the feed pipe 72. The slurry is distributed to each branch pipe 73. After the flow is limited by the flow regulating plate 76, it is sent into the spray pipe 74. The slurry is tangentially sprayed into the outer annular cavity between the scrubbing cylinder 1 and the dynamic screening cylinder 61. The drive motor 84 drives the scrubbing main shaft 2 to rotate the entire rotor scrubbing mechanism 6 at high speed. The hexagonal scrubbing cylinder 1 breaks the complete circumferential flow, reduces the short circuit of the slurry, and prolongs the material residence time. The slurry is dispersed by the high-speed impact on the impact teeth 65 and forms an up-and-down reversing flow under the action of the guide slope. A part of the slurry passes through the screening tank 62 and enters the inner cavity of the dynamic screening cylinder 61. In the inner cavity of the dynamic screening cylinder 61, the segmented ribs and three layers of stirring paddles stir the slurry together. The quartz sand particles collide and rub against each other, peeling off the clay, iron oxide and other impurities wrapped on the particle surface. Heavy mineral impurities with higher density settle and collect at the bottom of scrubbing cylinder 1 under the action of gravity, and are periodically discharged through the bottom slag discharge port; the qualified quartz sand slurry, carrying light impurities such as clay and mica, flows upward and overflows from the overflow port at the top of scrubbing cylinder 1, completing the entire set of impurity removal and cleaning operations. When shutting down, first cut off the slurry feed, and keep the rotor scrubbing mechanism 6 running for a period of time to empty the material accumulated in the dynamic screening cylinder 61 before shutting down, so as to avoid overload damage to the rotor scrubbing mechanism 6 caused by starting and stopping with material.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quartz sand cleaning and impurity removal device, comprising a scrubbing cylinder (1), wherein a scrubbing main shaft (2) is rotatably connected inside the scrubbing cylinder (1), characterized in that: The main scrubbing shaft (2) is provided with a rotor scrubbing mechanism (6). The rotor scrubbing mechanism (6) includes a hollow cylindrical dynamic screening cylinder (61). The dynamic screening cylinder (61) has multiple screening slots (62) circumferentially opened. The upper and lower ends of the dynamic screening cylinder (61) are respectively equipped with an upper impact ring (63) and a lower impact ring (64). The outer circles of the upper impact ring (63) and the lower impact ring (64) are circumferentially fixedly connected with multiple impact teeth (65). The inner circles of the upper impact ring (63) and the lower impact ring (64) are circumferentially fixedly connected with multiple connecting frames (66). The connecting frames (66) are fixedly connected to the main scrubbing shaft (2). An annular feeding mechanism (7) is provided on the outside of the scrubbing cylinder (1). The annular feeding mechanism (7) includes a distribution pipe (71) fixedly sleeved on the outside of the scrubbing cylinder (1). A feeding pipe (72) is fixedly connected to the distribution pipe (71). Multiple branch pipes (73) are also distributed circumferentially on the distribution pipe (71). The feeding end of the branch pipe (73) is connected to the distribution pipe (71). The discharge end of the branch pipe (73) extends into the scrubbing cylinder (1) and is fixedly connected to a spray pipe (74). The discharge end of the spray pipe (74) is located at the middle position of the dynamic screening cylinder (61).

2. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The scrubbing spindle (2) is fixedly connected from top to bottom to an upper stirring blade (3), a middle stirring blade (4), and a lower stirring blade (5). The upper stirring blade (3), the middle stirring blade (4), and the lower stirring blade (5) are phase-shifted and the blades are arranged at an inclined angle. The middle stirring blade (4) is located in the middle of the dynamic screening cylinder (61).

3. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The inner wall of the dynamic screening cylinder (61) is provided with multiple spiral ribs (67) along the circumference, and the multiple spiral ribs (67) extend along the axial direction of the dynamic screening cylinder (61). Each of the spiral ribs (67) includes multiple segmented ribs, which are distributed sequentially along the axial direction of the dynamic screening cylinder (61). Each rib is located between adjacent screening troughs (62) and is fixedly connected to the inner wall of the dynamic screening cylinder (61).

4. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: Wear-resistant sleeves (68) can be detachably connected to both sides of the screening trough (62), and the wear-resistant sleeves (68) are arranged along the axial direction of the screening trough (62).

5. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The upper and lower outer sides of the dynamic screening cylinder (61) are coaxially fixed with connecting flanges (69). The two connecting flanges (69) are respectively fitted to the lower surface of the upper impact ring (63) and the upper surface of the lower impact ring (64). The upper impact ring (63) and the lower impact ring (64) are circumferentially arrayed with assembly holes adapted to fastening bolts (610). One end of the fastening bolt (610) passes through the upper impact ring (63), the connecting flange (69) and the lower impact ring (64) in sequence and is threaded with a fastening nut.

6. The quartz sand impurity removal and cleaning device according to claim 5, characterized in that: Radial limiting grooves (611) are provided on the opposite sides of the upper impact ring (63) and the lower impact ring (64). Radial limiting steps (612) are fitted into the radial limiting grooves (611). The two radial limiting steps (612) are fixedly connected to the opposite sides of the two connecting flanges (69) to radially limit the dynamic screening cylinder (61). Multiple circumferentially distributed keyways (613) are provided on the opposite sides of the two connecting flanges (69). The circumferential keyways (613) are opened radially along the connecting flanges (69). Circumferential flat keys (614) are fitted into the circumferential keyways (613). The two circumferential flat keys (614) are respectively fixedly connected to the opposite sides of the upper impact ring (63) and the lower impact ring (64) for circumferentially limiting the dynamic screening cylinder (61).

7. The quartz sand cleaning and impurity removal device according to claim 1, characterized in that: The impact tooth (65) is a trapezoidal tooth structure with a wide root and a narrow tip; the impact tooth (65) of the upper impact ring (63) has a downwardly inclined first guide slope (615) on its material-facing surface, and the impact tooth (65) of the lower impact ring (64) has an upwardly inclined second guide slope (616) on its material-facing surface, and the impact tooth (65) on the upper impact ring (63) and the impact tooth (65) on the lower impact ring (64) are circumferentially misaligned.

8. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The branch pipe (73) includes a feeding section and a discharging section. The feeding end of the feeding section is connected to the distribution pipe (71), and the discharging end of the discharging section is connected to the feeding end of the spray pipe (74). The outer sides of the feeding section and the discharging section are coaxially fixed with locking flanges (75). A flow regulating plate (76) is sandwiched between the two locking flanges (75). A flow hole is opened in the middle of the flow regulating plate (76). A locking hole that matches the locking bolt is opened circumferentially on the edge of the flow regulating plate (76). The locking bolt passes through the locking holes of the two locking flanges (75) and the flow regulating plate (76) to achieve clamping assembly of the three.

9. The quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The outer side of the feed end of the spray pipe (74) and the outer side of the discharge end of the distribution pipe (71) are both coaxially fixed with fixed flanges (77). The two fixed flanges (77) are locked together by fixed bolts. The discharge end of the spray pipe (74) is arranged downwards, and the center line of the discharge end of the spray pipe (74) is parallel to the outer circle tangent of the dynamic screening cylinder (61).

10. A quartz sand impurity removal and cleaning device according to claim 1, characterized in that: The top of the scrubbing drum (1) is provided with a drive mechanism (8). The drive mechanism (8) includes a bracket (81) fixedly connected to the top of the scrubbing drum (1). A fixed seat (82) is fixedly connected to the bracket (81). A rotating hole for the scrubbing spindle (2) to pass through is opened in the middle of the fixed seat (82). The scrubbing spindle (2) is rotatably connected to the fixed seat (82). A support column (83) is rotatably sleeved on the scrubbing spindle (2) above the fixed seat (82). The support column (83) is fixedly connected to the fixed seat (82). A drive motor (84) for driving the scrubbing spindle (2) to rotate is also fixedly connected to the bracket (81).

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