An ultra-fine particle circulating screening device

Abstract

The present invention provides an ultra-fine particle circulating screening device, including a screening pool. An accommodation chamber is formed on the upper surface of the screening pool. A screening assembly is arranged in the accommodation chamber. The screening assembly includes a first limiting cylinder and a second limiting cylinder. The first ends of the first limiting cylinder and the second limiting cylinder are closed and the second ends are open. A screening main body is installed between the first limiting cylinder and the second limiting cylinder. A partition wall is arranged in the screening pool. The partition wall divides the screening pool into at least two juxtaposed screening chambers. At least two screening areas are arranged on the surface of the screening main body. The screening areas are opposite to the positions of the screening chambers. Sieve holes are formed on the surfaces of the screening areas. The sizes of the sieve holes in a plurality of the screening areas increase in sequence. This invention realizes the continuous screening of pulp and the continuous cleaning of the sieve mesh, and can improve the efficiency of pulp screening.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, and in particular to an ultrafine particle circulation screening device. Background Art

[0002] The copper grade of tailings of the two slag beneficiation systems put into operation by our company has always been greater than 0.2%. After research and investigation, it was found that the copper grade of tailings can be appropriately reduced by increasing the fineness of grinding; after research, it was found that controlling the mineral particle size in the slurry below 0.045mm can effectively reduce the copper grade of tailings, and the recovery efficiency is higher by beneficiating tailings with finer particle size; the common ball mills, vertical mills and other grinding equipment on the market need a long time to grind the materials to achieve the predetermined fineness. Investing too much time in the grinding process affects the production of the entire beneficiation system, resulting in reduced efficiency and increased beneficiation costs.

[0003] The traditional high-frequency vibrating screening device has a simple vibrating process. The slurry flows along the screen under the action of gravity with the water flow. When screening smaller mineral particles, some mineral particles quickly flow away with the surface water flow, causing economic losses; and some ultrafine mineral particles will clog the screen, reducing the screening efficiency of the screen, further resulting in the inability to effectively screen the mineral particles in the surface water flow, reducing the screening efficiency and causing greater economic losses; therefore, improving the screening method for ultrafine particle slurry and improving the screening efficiency are issues that need to be addressed. Summary of the invention

[0004] In view of the above problems, the present invention provides an ultrafine particle circulation screening device, which realizes continuous screening of ore pulp and continuous cleaning of the screen, and can improve the efficiency of ore pulp screening.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] An ultra-fine particle circulating screening device, comprising a screening tank, wherein a receiving chamber is formed on the upper surface of the screening tank, a screening assembly is arranged in the receiving chamber, the screening assembly includes a first limiting cylinder and a second limiting cylinder, the first ends of the first limiting cylinder and the second limiting cylinder are closed and the second ends are open, a screening main body is installed between the first limiting cylinder and the second limiting cylinder, a partition wall is arranged in the screening tank, the partition wall divides the screening tank into at least two juxtaposed screening chambers, at least two screening areas are arranged on the surface of the screening main body, the screening areas are opposite to the screening chambers in position, sieve holes are formed on the surface of the screening areas, the sizes of the sieve holes in a plurality of the screening areas increase in sequence, a driving device is arranged outside the screening tank for controlling the rotation of the screening main body, a reflux circulation device is arranged in the screening tank for controlling the directional flow of fluid, a blowing device located above the screening main body is fixedly connected to the surface of the screening tank, the blowing device includes an air flow homogenizing tank, an opening is formed at the lower end of the air flow homogenizing tank and is opposite to the upper end of the screening main body, and the air flow homogenizing tank is externally connected to a high-pressure air source.

[0007] Preferably, the reflux circulation device includes a first pumping branch pipe fixedly connected to the side wall of the first limiting cylinder, the end of the first pumping branch pipe penetrates through the screening tank, a second pumping branch pipe is fixedly connected to the side wall of the second limiting cylinder, the first end of the second pumping branch pipe penetrates through the screening tank, a pumping main pipe is connected between the first end of the second pumping branch pipe and the end of the first pumping branch pipe, and a pump body is connected in series in the pumping main pipe.

[0008] Preferably, the end of the second end of the second pumping branch pipe is located in the second limiting cylinder and is communicated with the second limiting cylinder, a filtering element is detachably installed at the end of the second end of the second pumping branch pipe, a cleaning brush is fixedly connected to the inner wall of the screening assembly, the cleaning brush is close to one side of the second limiting cylinder and is adapted to the surface of the filtering element.

[0009] Preferably, a feeding branch pipe is fixedly connected to the side wall of the first limiting cylinder, the end of the feeding branch pipe penetrates through the screening tank, and a feeding main pipe is fixedly connected to the end of the feeding branch pipe.

[0010] Preferably, the screening main body includes a plurality of screening installation rods which are circumferentially distributed, screening installation openings are formed on the surfaces of the screening installation rods, a screen main body is detachably fixedly connected between two adjacent screening installation rods, the inner wall of the screen main body is arc-shaped, and the inner walls of a plurality of the screen main bodies form a virtual circumferential surface.

[0011] Preferably, there are multiple groups of the screening assemblies, and the multiple groups of screening assemblies are arranged in parallel horizontally, and a predetermined distance is provided between two adjacent groups of screening assemblies.

[0012] Preferably, a vibration assembly is arranged in the screening tank. The vibration assembly includes a vibration mounting frame. A plurality of vibration protrusions are fixedly connected to the upper end of the vibration mounting frame. The positions of the vibration protrusions correspond to the positions of the corresponding screening assemblies. Both ends of the vibration mounting frame extend upward and are fixedly connected with vibration motors. A vibration conduction ring is fixedly connected to the surface of the screening assembly. The position of the vibration conduction ring corresponds to the position of the vibration protrusion.

[0013] Preferably, the air blowing device further includes an air blowing mounting frame. The air blowing mounting frame is fixedly connected to the upper end of the screening tank. The air flow equalization tank is arranged below the air blowing mounting frame and slides relative to it. A plurality of elastic telescopic rods are fixedly connected to the upper end of the air blowing mounting frame. The telescopic ends of the elastic telescopic rods are fixedly connected to the surface of the air flow equalization tank.

[0014] Preferably, a control piston is slidably connected to the inner wall of the elastic telescopic rod. The control piston is fixedly connected to the telescopic end of the elastic telescopic rod. A control chamber is formed between the control piston and the inner wall of the elastic telescopic rod. The control chamber is communicated with a gas source through a connecting pipe. The control chamber is communicated with the air flow equalization tank. An electric control valve is arranged in the connecting pipe. The electric control valve is externally connected to a control circuit. The control circuit is electrically connected to the driving device.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. It is put into the first limiting cylinder of the pulp cylinder, and a continuous screening process is completed during the rotation of the cylindrical screening assembly. During the rotation of the screening assembly, the positions of the sieve holes on the surface change in real time, which can avoid the low screening efficiency caused by the blockage of the sieve holes; and the air flow equalization tank on the surface of the screening assembly can perform high-pressure cleaning on the sieve holes from the outside to the inside to complete the cleaning of the large-particle substances blocked on the inner wall of the sieve holes, ensuring the high-efficiency screening effect of the sieve holes. During the continuous rotation process, continuous screening and cleaning are completed. Compared with the traditional plate-shaped screening equipment, the effect of screening small-particle pulp substances is better.

[0017] 2. By setting the reflux circulation device, the directional flow of the pulp in the screening assembly can be controlled, allowing the pulp to flow directionally in the screening assembly, enabling the pulp to pass through different positions on the inner wall of the screening assembly to achieve screening, and improving the screening efficiency; and the large-particle substances in the pulp can move synchronously with the flow of the pulp to complete the centralized collection process; a filtering element is arranged at the end of the second pumping branch pipe to screen particle substances of different sizes, allowing the small-particle substances to flow back and circulate to achieve re-screening and improve the screening rate.

[0018] 3. The screen body is detachably connected to the surface of the screening mounting rod, and each part of the screen body can be replaced separately, reducing the cost of subsequent maintenance; and by setting the screening mounting rod to protrude outward and its inner side to be continuous, the stability of internal particle screening and directional movement can be ensured. The screening mounting rod protruding outward can also play a role in disturbing the flow, strengthening the effect on the surfaces of the two screening components on both sides, improving the cleaning effect of the screen holes, and further improving the screening efficiency. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a top-view structural schematic diagram of the present invention;

[0021] Figure 3 It is a side-view structural schematic diagram of the present invention;

[0022] Figure 4 It is a sectional structural schematic diagram taken along line A-A of the present invention;

[0023] Figure 5 It is a sectional structural schematic diagram taken along line B-B of the present invention;

[0024] Figure 6 It is a sectional structural schematic diagram taken along line C-C of the present invention.

[0025] In the figure: 1. Screening tank; 101. Accommodation chamber; 102. Driving device; 103. Partition wall; 2. Screening component; 201. First limiting cylinder; 202. Second limiting cylinder; 203. Screening main body; 2031. Screen body; 2032. Vibration conduction ring; 2033. Rotating connecting piece; 2034. Screening mounting rod; 3. Blowing device; 301. Blowing mounting frame; 302. Airflow equalization tank; 303. Elastic telescopic rod; 4. Pumping main pipe; 401. Second pumping branch pipe; 5. Feeding main pipe; 501. Feeding branch pipe; 6. Vibration component; 601. Vibration motor; 602. Vibration mounting frame; 603. Vibration protrusion. Detailed Embodiments

[0026] The present invention will be further described below with reference to the drawings and embodiments.

[0027] Refer to Figure 1-6, an ultra-fine particle circulating screening device, comprising a screening tank 1. An accommodation chamber 101 is formed on the upper surface of the screening tank 1. A screening assembly 2 is arranged in the accommodation chamber 101. The screening assembly 2 is in the shape of a long cylinder. The original pulp is introduced into the screening assembly 2, and continuous screening of the pulp can be achieved during the rotation of the screening assembly 2. The screening assembly 2 includes a first limiting cylinder 201 and a second limiting cylinder 202. The first ends of the first limiting cylinder 201 and the second limiting cylinder 202 are closed and the second ends are open. A screening main body 203 is installed between the first limiting cylinder 201 and the second limiting cylinder 202. The open areas of the first limiting cylinder 201 and the second limiting cylinder 202 face the middle position. The screening main body 203 is installed between them, and the connection between the two is sealed and rotatable to prevent pulp from flowing in and affecting the normal rotation of the screening main body 203.

[0028] A partition wall 103 is arranged in the screening tank 1. The partition wall 103 divides the screening tank 1 into at least two juxtaposed screening chambers. At least two screening areas are arranged on the surface of the screening main body 203. The screening areas are opposite to the screening chambers in position. Sieve holes are formed on the surface of the screening areas. The sizes of the sieve holes in several screening areas increase in sequence. Taking the attached drawing as an example, two groups of partition walls 103 are arranged. On the one hand, the partition wall 103 can support the relatively long screening main body 203 to ensure the stability of its rotation; on the other hand, it can divide the screening tank 1 into several screening chambers. The sieve hole sizes corresponding to different screening chambers are different, so the particle sizes of the pulp in different screening chambers are different.

[0029] The smaller the sieve hole size is closer to the first limiting cylinder 201, and the smaller the particle size of the pulp in this screening area is, which meets the requirements of subsequent flotation and scavenging processes. It should be noted here that a closed rotating connector 2033 is fixedly connected to the surface of the screening main body 203. Its position is opposite to that of the partition wall 103, and the rotation between the two is also sealed. It can separate multiple screening chambers from each other to ensure that the pulp will not be mixed with each other. And the rotating connector 2033 extends towards both sides, which can strengthen the sealing performance of the connection and ensure the stability of the rotation of the screening main body 203. A cone is arranged at the bottom of each separated screening chamber, and a discharge opening is arranged at the bottom of the deep cone to realize the discharge of the screened materials.

[0030] A driving device 102 is provided outside the screening tank 1 to control the rotation of the screening main body 203. A reflux circulation device is provided inside the screening tank 1 to control the directional flow of the fluid. By setting the driving device 102 to control the directional rotation of the screening main body 203, different sieve holes on the surface of the screening main body 203 can be located in the area of ore pulp screening during the rotation process, realizing the cyclic screening process. And by setting the reflux circulation device, the ore pulp in the screening assembly 2 can be directionally moved, so that the ore pulp can flow from one side of the first limiting cylinder 201 towards the second limiting cylinder 202, and then flow from the second limiting cylinder 202 side into the first limiting cylinder 201 to complete the cyclic screening process. The screening main body 203 is cylindrical, and it is difficult to screen the particulate matter on its surface layer and central position at one time. By setting the ore pulp reflux, the ore pulp at the end can be added again from the first limiting cylinder 201 to complete the continuous cyclic screening process.

[0031] A blowing device 3 is fixedly connected to the surface of the screening tank 1 above the screening main body 203. The blowing device 3 includes an air flow homogenization tank 302. The lower end of the air flow homogenization tank 302 is provided with an opening and is opposite to the upper end of the screening main body 203. The air flow homogenization tank 302 is externally connected to a high-pressure air source. Under the action of the high-pressure air source, the pressurized gas can be blown out from the air flow homogenization tank 302 and act on the upper end surface of the screening main body 203. During the screening process of the ore pulp, by controlling at least part of the top end of the screening main body 203 to be above the liquid level, part of the top end of the screening main body 203 can be in the air, and the air flow can directly act on the position of the sieve holes, acting on the particles blocked in the sieve holes to make them fall into the screening main body 203, ensuring the normal screening function of the sieve holes. And the fallen particulate matter can flow with the ore pulp in the screening main body 203, flow out from the sieve holes that meet the size, or be directly located in the screening area at the end, accumulate and remain, and be centrally cleaned after accumulation.

[0032] Among them, the reflux circulation device includes a first pumping branch pipe, which is fixedly connected to the side wall of the first limiting cylinder 201. The end of the first pumping branch pipe penetrates through the screening tank 1. A second pumping branch pipe 401 is fixedly connected to the side wall of the second limiting cylinder 202. The first end of the second pumping branch pipe 401 penetrates through the screening tank 1. A pumping main pipe 4 is connected between the first end of the second pumping branch pipe 401 and the end of the first pumping branch pipe. A pump body is connected in series in the pumping main pipe 4. The pump body can realize the directional pumping of the liquid, control the liquid to be sucked from the second pumping branch pipe 401, and move along the pumping main pipe 4 and finally flow out from the first pumping branch pipe, so that the liquid can move directionally. By setting the reflux circulation device, the pulp in the screening assembly 2 can move directionally, that is, move from one end of the first limiting cylinder 201 towards the second limiting cylinder 202, and the screening can be completed during the process of controlling the directional movement of the pulp, ensuring the screening efficiency of the pulp. In addition, through the reflux device, the re-screening of the pulp can be realized. During the screening process of the device, some small-sized particulate matters still flow along with the surface layer of the pulp and do not enter the screening chamber through the surface of the sieve mesh. By controlling the re-circulation of the pulp, the cyclic screening of the pulp can be realized, enabling the small-sized particles to be cyclically screened and ensuring the screening efficiency.

[0033] The end of the second end of the second pumping branch pipe 401 is located inside the second limiting cylinder 202 and is communicated with it. A filtering element is detachably installed at the end of the second end of the second pumping branch pipe 401. By installing a filtering element on the surface of the second end of the second pumping branch pipe 401, the large-particle pulp particles can be blocked, allowing the small-sized pulp particles to circulate with the flow of the pulp, so as to avoid the repeated flow of the pulp with large-particle substances and increase the screening burden. A cleaning brush is fixedly connected to the inner wall of the screening assembly 2. The cleaning brush is close to the side of the second limiting cylinder 202 and is adapted to the surface of the filtering element. The cleaning brush can rotate synchronously with the screening assembly 2, and during the rotation process, it can clean the surface of the filtering element to ensure its high filtering efficiency.

[0034] It should be noted here that there are no screening holes on the surface near the second limiting cylinder 202, and it is a cylindrical structure with a closed surface. Pulp and other particulate matter cannot be screened from here. A through-hole for large-sized mineral particles to fall is opened at the bottom end of the second limiting cylinder 202. The larger-sized mineral particles fall from here to complete the collection process. The large and small particulate matter in the pulp all move towards the direction of the second pumping branch pipe 401, and the end of the second pumping branch pipe 401 extends towards the direction of the first limiting cylinder 201, partially protruding through the through-hole. At this time, the large and small particulate matter in the pulp are all screened through the second pumping branch pipe 401. The small particulate matter flows through the second pumping branch pipe 401 to achieve circulation. The particulate matter larger than the screening size of the second pumping branch pipe 401 falls onto the inner wall of the screening assembly 2 under the action of the cleaning brush. An inclined material scooping plate can be arranged on the inner wall of the screening assembly 2 here, so that the large particulate matter can fall into the dropping port during the rotation of the screening assembly 2, realizing the separation of large and small particles and the cyclic screening of small particle pulp particles.

[0035] A feed branch pipe 501 is fixedly connected to the side wall of the first limiting cylinder 201. The end of the feed branch pipe 501 penetrates through the screening tank 1, and a feed main pipe 5 is fixedly connected to the end of the feed branch pipe 501. The original pulp is added from the feed main pipe 5 and extends into the first limiting cylinder 201 through the feed branch pipe 501 to achieve the addition of materials. The added materials flow orderly along the screening assembly 2 to complete the screening.

[0036] The screening main body 203 includes a number of screening mounting rods 2034 which are circumferentially distributed. Screening mounting openings are formed on the surface of the screening mounting rods 2034. A screen main body 2031 is detachably and fixedly connected between two adjacent screening mounting rods 2034. By setting structures such as the screening mounting rods 2034, the screen main body 2031 can be disassembled separately and can be replaced separately according to the damage conditions of each part, which can simplify the subsequent maintenance process and reduce the maintenance cost. The inner wall of the screen main body 2031 is arc-shaped, and the inner walls of multiple screen main bodies 2031 form a virtual circumferential surface. The joints of the inner walls of multiple screen main bodies 2031 are continuous. The large particulate matter partially precipitated on the inner wall in the pulp can move cyclically inside without residual dead corners. The large and small particle pulp particles can flow from the direction of the first limiting cylinder 201 towards the direction of the second limiting cylinder 202 along the direction of the liquid flow, ensuring the normal progress of screening.

[0037] The screening components 2 are in multiple groups, and the multiple groups of screening components 2 are arranged side by side in a horizontal posture, with a predetermined distance between adjacent two groups of screening components 2. By setting the screening components 2 in multiple groups, the working surface of screening can be increased, and the working efficiency of screening can be improved to meet the requirements of pulp screening; and through the driving device 102, multiple screening components 2 can be controlled to flow in the same direction. During the rotation of the screening components 2, the liquid flow in the screening chamber can be locally controlled, so that the pulp in the screening chamber flows directionally as the screening components 2 rotate. Among them, multiple screening components 2 rotate in the same direction, and the screening component 2 in the middle position can drive the pulp in the middle position to flow synchronously during the rotation process. Taking the screening component 2 rotating clockwise as an example, the screening component 2 rotating clockwise can drive the pulp in a local area of the screening chamber to flow synchronously, and the flowing pulp can impact the left screening component 2. At this time, part of the sieve holes of the left screening component 2 just emerge from the liquid surface, and the impact from the outside can accelerate the detachment of the surface particulate matter; the same is true for the right side. At this time, the right screening component 2 has been initially cleaned by the blowing device 3, and the pulp impacting on the right side at this time can impact the surface of the right screening component 2 for secondary cleaning, strengthening the cleaning effect, further avoiding the blockage of the sieve holes by large-sized pulp particles, and improving the overall screening efficiency; it should be noted here that a part of the surface of the screening mounting rod 2034 protrudes outward. The protruding screening mounting rod 2034 can not only increase the installation area of the sieve mesh body 2031, ensure stable installation and internal continuity; and the protruding screening mounting rod 2034 can play a stirring role here, which can strengthen the turbulence effect during the rotation of the screening component 2, strengthen the impact, and strengthen the screening effect.

[0038] A vibration component 6 is arranged in the screening pool 1. The vibration component 6 includes a vibration mounting frame 602. A plurality of vibration protrusions 603 are fixedly connected to the upper end of the vibration mounting frame 602. The positions of the vibration protrusions 603 correspond to the positions of the corresponding screening components 2. Both ends of the vibration mounting frame 602 extend upward and are fixedly connected with vibration motors 601. A vibration conduction ring 2032 is fixedly connected to the surface of the screening component 2. The position of the vibration conduction ring 2032 corresponds to the position of the vibration protrusion 603. Among them, the vibration mounting frame 602 is U-shaped, and its middle position extends below the water surface. The vibration protrusions 603 at the top can abut against the surface of the vibration conduction ring 2032. The vibration generated by the vibration motor 601 can be conducted through the rigid vibration mounting frame 602 and the vibration protrusions 603, realizing energy transfer and strengthening the screening process of the pulp in this area; and by setting the vibration mounting frame 602 to be U-shaped, the vibration motor 601 can be placed above the liquid surface, ensuring the installation and normal use of the overall vibration motor 601.

[0039] The air blowing device 3 further comprises an air blowing mounting frame 301, which is fixedly connected to the upper end of the screening pool 1, and an air flow homogenizing tank 302 is arranged below the air blowing mounting frame 301 and slides relatively therewith. A plurality of elastic telescopic rods 303 are fixedly connected to the upper end of the air blowing mounting frame 301, and the telescopic ends of the elastic telescopic rods 303 are fixedly connected to the surface of the air flow homogenizing tank 302. The high-pressure gas source generated by the air blowing device 3 can be transmitted to the surface of the air flow homogenizing tank 302 through the gas transmission pipeline, and the gas can be blown out along the air flow homogenizing tank 302 to achieve the treatment of the sieve holes from the outside to the inside. The sieve holes are kept clean and tidy, and the screening efficiency is ensured; and because of the protruding screening installation rod 2034, the surface of the screening component 2 does not have a continuous curved surface. The airflow homogenizing groove 302 can be lifted by setting the elastic telescopic rod 303 to ensure the continuous rotation of the screening component 2 and avoid collision damage to the airflow homogenizing groove 302; similarly, a rotational connection can be set between the airflow homogenizing groove 302 and the telescopic end of the elastic telescopic rod 303, so that the screening installation rod 2034 pushes the airflow homogenizing groove 302 to rotate to one side when in contact, so as to ensure continuous pump air cleaning.

[0040] A control piston is slidably connected to the inner wall of the elastic telescopic rod 303, and the control piston is fixedly connected to the telescopic end of the elastic telescopic rod 303. A control chamber is formed between the control piston and the inner wall of the elastic telescopic rod 303. The control chamber is connected to the high-pressure gas source through a connecting pipe, and the control chamber is connected to the airflow homogenizing tank 302. An electric control valve is arranged in the connecting pipe. The electric control valve is externally connected to a control circuit, and the control circuit is electrically connected to the drive device 102. The control circuit can realize coordinated control of the drive device 102 and the electric control valve, so as to control the opening and closing of the electric control valve during the rotation of the screening component 2; when the screening component 2 is in the state of rotation, the electric control valve is opened and closed. When the screening installation rod 2034 with a raised surface is rotated to one side of the blowing installation frame 301, the electric control valve in the connecting pipe cuts off the passage, and the elastic telescopic rod 303 itself shrinks as a whole under the action of its own elasticity, thereby driving the top of the airflow homogenizing groove 302 to rise, so that the two are staggered; during normal operation, the high-pressure gas source can push the telescopic end of the elastic telescopic rod 303 to move outward, and the telescopic end can push the airflow homogenizing groove 302 at the end to collide with the surface of the screening component 2, so that the high-pressure gas can directly act on one side of the sieve hole on the surface of the screening component 2, thereby improving the screening effect on large-sized particles blocked at the sieve hole.

[0041] During the operation of the present invention, when it is necessary to screen the pulp, the pulp to be screened is separately screened into multiple screening components 2 through the feed main pipe 5 and multiple feed branch pipes 501. The pulp flows in from the feed branch pipe 501 and passes through the first limiting cylinder 201, the screening main body 203, and the second limiting cylinder 202 in sequence. Moreover, the driving device 102 can control the synchronous rotation of multiple screening components 2. During the rotation process, the screening of fine particles in the pulp can be realized, and the surface of the blowing device 3 can be blown and cleaned during the rotation process. The high-pressure air flow blows onto the surface of the screening component 2, which can clean the particles blocked on the surface of the sieve holes, so that the screening component 2 can continuously and efficiently screen the pulp inside. It should be noted here that the top of the screening component 2 is controlled to be above the liquid level, and the blown gas can effectively act on the sieve holes at the top. After cleaning, the sieve holes rotate to the lower end again, enabling the ultra-fine mineral particles to pass through the sieve holes, completing a continuous and stable screening process. And the size of the sieve holes gradually increases, the size of the sieve holes on the side close to the first limiting cylinder 201 is smaller than that on the side close to the second limiting cylinder 202. The pulp in the screening area on the side close to the first limiting cylinder 201 is the target pulp, and the mineral particles with larger sizes flow to the screening area on the side close to the second limiting cylinder 202 along with the screening component 2, realizing the separation of the two. Subsequently, the mineral particles with larger sizes can be ground again.

[0042] Moreover, during the rotation of the screening component 2, the vibration component 6 at the lower end of the screening component 2 can cause the screening component 2 to vibrate. The high-frequency vibration generated by the vibration motor 601 is conducted to the surface of the vibration conduction ring 2032 through the vibration mounting frame 602 and the vibration protrusion 603, and finally conducted to the surface of the sieve mesh main body 2031 through the screening mounting rod 2034. The sieve mesh main body 2031 can vibrate synchronously at a high frequency, completing the efficient screening of the mineral particles on the surface, driving its vibration, providing energy to accelerate the screening through the sieve holes.

[0043] Among them, the pump body connected in series in the pumping main pipe 4 can drive the pulp to move directionally, so that the filtered pulp on the side of the second limiting cylinder 202 can flow back to the first limiting cylinder 201 in sequence through components such as the second pumping branch pipe 401 and the pumping main pipe 4, and let it pass through the screening component 2 again to complete the cyclic screening process; in order to improve the screening efficiency, it can greatly reduce the content of ultra-fine mineral particles in the screening area on the side close to the second limiting cylinder 202, improve the screening efficiency, and improve the overall economic benefits.

[0044] The pulp is input from the feed branch pipe 501 and flows out from the second pumping branch pipe 401, forming a flowing cycle of the internal pulp in the screening pool 1. The pulp and the internal particles in the screening component 2 can flow synchronously, realizing a horizontal driving process, and can drive the pulp to pass through different screening areas in sequence to complete the screening.

[0045] During the rotation of the screening component 2, the cleaning brush fixed to its inner wall can clean the surface of the filtering element, causing the larger-sized mineral particles attached to its surface to fall off. A through-hole for the larger-sized mineral particles to fall through is provided at the bottom end of the second limiting cylinder 202, and the larger-sized mineral particles fall from here to complete the collection process.

[0046] During the entire screening process, the pump body in the main pumping pipe 4 circulates, enabling the pulp to undergo a cyclic screening process; the raw pulp is continuously added at the feed branch pipe 501 to achieve a continuous operation process; and the screened pulp continuously flows out from the screening area near the first limiting cylinder 201 to complete the blanking process; controlling the discharge speed to be approximately the same as the discharge speed of the raw pulp can complete the continuous screening of the pulp; and the filter residue in the screening area near the second limiting cylinder 202 is regularly removed and reground to complete the efficient and accurate processing process.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ultrafine particle circulation screening device, comprising a screening pool (1), wherein the upper surface of the screening pool (1) is provided with a receiving chamber (101), wherein a screening component (2) is arranged in the receiving chamber (101), It is characterized in that The screening component (2) comprises a first limiting cylinder (201) and a second limiting cylinder (202), wherein the first end of the first limiting cylinder (201) and the second limiting cylinder (202) are closed and the second end is open, and a screening body (203) is installed between the first limiting cylinder (201) and the second limiting cylinder (202), and a partition wall (103) is arranged in the screening pool (1), and the partition wall (103) divides the screening pool (1) into at least two parallel screening chambers, and at least two screening areas are arranged on the surface of the screening body (203), and the screening areas are opposite to the screening chambers, and the screening areas The surface of the screening tank (1) is provided with sieve holes, and the sizes of the sieve holes in the screening area are increased in sequence. A driving device (102) is arranged outside the screening tank (1) for controlling the rotation of the screening body (203). A reflux circulation device is arranged inside the screening tank (1) for controlling the directional flow of the fluid. The surface of the screening tank (1) is fixedly connected with a blowing device (3) located above the screening body (203). The blowing device (3) comprises an airflow homogenizing groove (302). The lower end of the airflow homogenizing groove (302) is provided with an opening and is opposite to the upper end of the screening body (203). The airflow homogenizing groove (302) is externally connected to a high-pressure air source. The reflux circulation device comprises a first pumping branch pipe, the first pumping branch pipe is fixedly connected to the side wall of the first limiting cylinder (201), the end of the first pumping branch pipe passes through the screening pool (1), the second limiting cylinder (202) is fixedly connected to the side wall of the second pumping branch pipe (401), the first end of the second pumping branch pipe (401) passes through the screening pool (1), a pumping main pipe (4) is connected between the first end of the second pumping branch pipe (401) and the end of the first pumping branch pipe, and a pump body is connected in series in the pumping main pipe (4); The end of the second end of the second pumping branch pipe (401) is located in the second limiting cylinder (202) and is connected thereto, and a filter element is detachably mounted on the end of the second end of the second pumping branch pipe (401). A cleaning brush is fixedly connected to the inner wall of the screening assembly (2), and the cleaning brush is close to one side of the second limiting cylinder (202) and is adapted to the surface of the filter element.

2. The ultrafine particle circulation screening device according to claim 1, It is characterized in that A feed branch pipe (501) is fixedly connected to the side wall of the first limiting cylinder (201), the end of the feed branch pipe (501) passes through the screening pool (1), and the end of the feed branch pipe (501) is fixedly connected to a feed main pipe (5).

3. The ultrafine particle circulation screening device according to claim 1, It is characterized in that The screening body (203) includes a plurality of screening mounting rods (2034) which are circumferentially distributed. Screening mounting openings are formed on the surfaces of the screening mounting rods (2034). A screen body (2031) is detachably and fixedly connected between two adjacent screening mounting rods (2034). The inner wall of the screen body (2031) is arc-shaped, and the inner walls of a plurality of the screen bodies (2031) form a virtual circumferential surface.

4. The ultra-fine particle circulating screening device according to claim 1, wherein, The screening assemblies (2) are multiple groups, and the multiple groups of screening assemblies (2) are arranged side by side in a horizontal posture, and a predetermined distance is provided between two adjacent groups of screening assemblies (2).

5. The ultra-fine particle circulating screening device according to claim 4, wherein, A vibration assembly (6) is arranged in the screening pool (1). The vibration assembly (6) includes a vibration mounting frame (602). A plurality of vibration protrusions (603) are fixedly connected to the upper end of the vibration mounting frame (602). The positions of the vibration protrusions (603) correspond to the positions of the corresponding screening assemblies (2). Both ends of the vibration mounting frame (602) extend upward and are fixedly connected with vibration motors (601). A vibration conduction ring (2032) is fixedly connected to the surface of the screening assembly (2), and the position of the vibration conduction ring (2032) corresponds to the position of the vibration protrusion (603).

6. The ultra-fine particle circulating screening device according to claim 1, wherein, The air blowing device (3) further includes an air blowing mounting frame (301). The air blowing mounting frame (301) is fixedly connected to the upper end of the screening pool (1). The air flow equalization tank (302) is arranged below the air blowing mounting frame (301) and slides relative thereto. A plurality of elastic telescopic rods (303) are fixedly connected to the upper end of the air blowing mounting frame (301), and the telescopic ends of the elastic telescopic rods (303) are fixedly connected to the surface of the air flow equalization tank (302).

7. The ultra-fine particle circulating screening device according to claim 6, wherein, A control piston is slidably connected to the inner wall of the elastic telescopic rod (303). The control piston is fixedly connected to the telescopic end of the elastic telescopic rod (303). A control chamber is formed between the control piston and the inner wall of the elastic telescopic rod (303). The control chamber is communicated with a gas source through a connecting pipe. The control chamber is communicated with the air flow equalization tank (302). An electric control valve is arranged in the connecting pipe. The electric control valve is externally connected to a control circuit, and the control circuit is electrically connected to the driving device (102).

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