Sieving equipment for preparing rare earth composite yttrium oxide setter plate superfine powder and using method of screening equipment for preparing rare earth composite yttrium oxide setter plate superfine powder

Abstract

The invention discloses a screening device for preparing rare earth composite yttrium oxide sintering plate superfine powder and a using method thereof, and relates to the technical field of powder screening devices.The screening device comprises a base, a screening box is arranged at the front end of the top of the base, a material receiving box is detachably connected to the bottom of the screening box, and a screen body is fixedly connected to an inner cavity of the screening box. According to the fine powder screening device, the screening box, the material receiving box and the screen body are arranged, the screening box is used for providing screening space for fine powder, the screen body is used for screening the fine powder, the material receiving box is used for storing the screened fine powder, the movable unit is arranged, the screening box can be driven to move back and forth in a reciprocating mode, and therefore the fine powder is better screened in cooperation with inertia; and through the arrangement of the grinding unit, the sieved large-particle cakes can be ground, so that secondary sieving can be carried out on the cakes, the raw material utilization rate and the finished product quality are improved, and the situation that sieve holes are blocked by particles can be effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of powder screening devices, in particular to a screening device for rare earth composite yttrium oxide support plate ultrafine powder and a use method thereof. Background Art

[0002] Rare earth composite yttrium oxide setter plate ultrafine powder is a composite oxide containing rare earth elements, mainly used as ultrafine powder in setter plates or ceramic materials. This material is usually used in electronics, ceramics, optics, catalysis and energy and other fields, and has special properties, such as high temperature stability, good electrical conductivity, thermal conductivity and excellent chemical stability. The preparation of rare earth composite yttrium oxide setter plate ultrafine powder is a high-tech process, including raw material preparation, sol-gel method to prepare precursors, coprecipitation method to prepare composite powders, high-temperature sintering, ultrafine powder preparation and post-processing and refining, among which screening is an important step in post-processing and refining, and can separate ultrafine powders with a suitable particle size range;

[0003] In the preparation of rare earth composite yttrium oxide support plate ultrafine powder, screening equipment plays a key role, especially in obtaining ultrafine powder of suitable particle size, screening is a key step to ensure that the powder particle size distribution is uniform and reaches the predetermined specifications. The screening of ultrafine powders usually requires fine and effective equipment to handle materials with small particle size and easy to aggregate. During the preparation process of yttrium oxide powder, it may agglomerate due to static electricity or humidity, resulting in the formation of larger agglomerates between particles, which are difficult to screen through the sieve. This will not only affect the screening effect and cause uneven particle distribution, but may also cause the sieve holes to be blocked, affecting the normal screening work. Summary of the invention

[0004] The purpose of the present invention is to provide a rare earth composite yttrium oxide support plate ultrafine powder system and a use method thereof, which has the advantage of good screening effect and solves the problem that yttrium oxide powder may agglomerate due to static electricity or humidity during the preparation process, resulting in large agglomerates between particles, which are difficult to screen through the sieve. This not only affects the screening effect and causes uneven particle distribution, but may also cause clogging of the sieve holes, affecting the normal screening work.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rare earth composite yttrium oxide support plate ultrafine powder preparation standby screening equipment and a use method thereof, comprising a base, a screening box is arranged at the front end of the top of the base, a material receiving box is detachably connected to the bottom of the screening box, a screen body is fixedly connected to the inner cavity of the screening box, a movable unit is arranged on the left side of the base, and a rolling unit is arranged at the rear end of the top of the base;

[0006] The movable unit comprises a side plate, the side plate is located on the left side of the base and is fixedly connected to the base, the front end and the rear end of the lower end of the left side of the side plate are fixedly connected to a support sleeve, the inner cavity of the support sleeve is slidably connected to a movable column, a semi-toothed ring is provided on the top of the movable column, a rack is fixedly connected to the top of the movable column, the semi-toothed ring is meshed with the rack, and the front end of the rack is fixedly connected to the left side of the screening box;

[0007] The rolling unit includes a rolling box, which is located at the rear end of the top of the base and fixedly connected to the base. Through grooves are provided on the front and back of the rolling box. The inner cavity of the discharge port on the back of the screening box is movably connected with a leakage-proof plate through a damping shaft, and the right end of the shaft rod passes through the right side of the screening box and is fixedly connected with a rotating handle. The leakage-proof plate is movably connected to the inner cavity of the through groove on the front side, and the inner cavity of the rolling box is movably connected to a support frame, and the inner cavity of the support frame is movably connected to a rolling roller through a bearing.

[0008] Preferably, a turntable is provided at the upper end of the left side of the side plate, and a motor is fixedly connected to the right side of the side plate. The output shaft of the motor passes through the side plate and is drivingly connected to the right side of the turntable.

[0009] Preferably, a rotating frame is movably connected to the left side of the side plate and located between the movable column and the turntable through a movable pin, the top of the semi-toothed ring is fixedly connected to the bottom of the rotating frame, the inner cavity of the rotating frame is slidably connected to a traction column, and the right end of the traction column is fixedly connected to the turntable.

[0010] Preferably, a slide groove is provided on the top of the rolling box, and a pushing frame is slidably connected to the inner cavity of the slide groove. The bottom of the pushing frame extends to the inner cavity of the rolling box and is fixedly connected to the top of the support frame.

[0011] Preferably, the inner cavity of the rolling box is movably connected with a scraper, the back of the scraper is fixedly connected with a push rod, the rear end of the push rod extends to the outside of the rolling box, the top of the screening box is fixedly connected with a feeding hopper, and support columns are fixedly connected on both sides of the back of the screening box, the rear end of the support column penetrates into the inner wall of the rolling box and is slidably connected to its inner wall.

[0012] Preferably, both sides of the screening box are fixedly connected with slide rails, both sides of the material receiving box are fixedly connected with sliders, one side of the slider extends to the inner cavity of the slide rail and is movably connected with the inner cavity of the slide rail, and the front side of the screening box is movably connected with an anti-slip sheet through a movable pin.

[0013] Preferably, the method of use is as follows:

[0014] A. First, start the motor. The output shaft of the motor drives the turntable to rotate. The turntable then drives the traction column to rotate. When the traction column rotates, it can push the rotating frame to make it reciprocate in an arc around the movable pin. The rotating frame can also drive the semi-toothed ring to rotate reciprocatingly. Since the semi-toothed ring is meshed with the rack, when the semi-toothed ring rotates, it can cooperate with the rack to drive the movable column to move back and forth in the inner cavity of the support sleeve, thereby driving the screening box to move. At this time, the fine powder raw material can be added to the inside of the screening box through the feeding hopper, and the fine powder is screened by the screen body. After screening, the qualified fine powder falls directly into the inside of the receiving box and is stored by the receiving box. The fine powder with larger particles and agglomerates is accumulated on the upper end of the screen body and is protected by the leak-proof plate to prevent it from sliding.

[0015] B. When the agglomerated fine powder needs to be processed, first ensure that the back of the screening box is in close contact with the front of the rolling box, then turn the handle to adjust the angle of the leak-proof plate so that it rotates to the inside of the front slot. At this time, the block particles will roll through the front slot to the inside of the rolling box, and then push the pushing frame to drive the rolling roller to roll inside the rolling box. While rolling, the rolling roller can crush the granular raw materials. After rolling for a certain period of time, the push rod can be pulled to drive the scraper to move inside the rolling box. While moving, the crushed raw materials can be scraped out and screened again after scraping.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a base for supporting and fixing the components on the top, thereby improving the stability of each component when in use; and provides a screening box, a receiving box and a screen body. The screening box is used to provide a screening space for fine powder, the screen body is used to screen the fine powder, and the receiving box is used to store the screened fine powder. By providing a movable unit, the screening box can be driven to move back and forth, so that the fine powder can be better screened with inertia, thereby improving the screening efficiency; by providing a crushing unit, the agglomerates of larger particles screened out can be crushed so as to perform secondary screening on them, thereby improving the utilization rate of raw materials and the quality of finished products, and effectively preventing the particles from clogging the sieve holes. The problem that yttrium oxide powder may agglomerate due to static electricity or humidity during the preparation process, resulting in larger agglomerates formed between particles, which are difficult to be screened through the sieve, which not only affects the screening effect and causes uneven distribution of particles, but may also cause clogging of the sieve holes, thereby affecting the normal screening work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the main structure of the side panel of the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the rolling box of the present invention;

[0021] Figure 4 It is a schematic diagram of the side cross-sectional structure of the screening box of the present invention;

[0022] Figure 5 It is a schematic diagram of the front view structure of the rolling roller and the scraper of the present invention.

[0023] In the figure: 1. base; 2. screening box; 3. receiving box; 4. screen body; 5. movable unit; 501. side plate; 502. support sleeve; 503. movable column; 504. semi-toothed ring; 505. rack; 506. turntable; 507. motor; 508. rotating frame; 509. traction column; 6. rolling unit; 601. rolling box; 602. through groove; 603. leak-proof plate; 604. support frame; 605. rolling roller; 606. slideway; 607. pushing frame; 608. scraper; 609. push rod; 7. feeding hopper; 8. support column; 9. anti-slip sheet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The base 1, screening box 2, receiving box 3, screen body 4, movable unit 5, side plate 501, support sleeve 502, movable column 503, semi-toothed ring 504, rack 505, turntable 506, motor 507, rotating frame 508, traction column 509, rolling unit 6, rolling box 601, through groove 602, leak-proof plate 603, support frame 604, rolling roller 605, slide 606, pushing frame 607, scraper 608, push rod 609, feeding hopper 7, support column 8, and anti-slip sheet 9 of the present invention are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0026] Example 1

[0027] like Figure 1-5As shown, it is the first embodiment of the present invention, which provides a rare earth composite yttrium oxide support plate ultrafine powder preparation standby screening device and its use method, comprising a base 1, a screening box 2 is arranged at the front end of the top of the base 1, a material receiving box 3 is detachably connected to the bottom of the screening box 2, a screen body 4 is fixedly connected to the inner cavity of the screening box 2, a movable unit 5 is arranged on the left side of the base 1, and a rolling unit 6 is arranged at the rear end of the top of the base 1;

[0028] The movable unit 5 includes a side plate 501, which is located on the left side of the base 1 and fixedly connected to the base 1. The front and rear ends of the lower end of the left side of the side plate 501 are fixedly connected to a support sleeve 502. The inner cavity of the support sleeve 502 is slidably connected to a movable column 503. A semi-toothed ring 504 is provided on the top of the movable column 503. A rack 505 is fixedly connected to the top of the movable column 503. The semi-toothed ring 504 is meshed with the rack 505. The front end of the rack 505 is fixedly connected to the left side of the screening box 2.

[0029] The rolling unit 6 includes a rolling box 601, which is located at the rear end of the top of the base 1 and is fixedly connected to the base 1. Through grooves 602 are provided on the front and back of the rolling box 601. The inner cavity of the discharge port on the back of the screening box 2 is movably connected with a leak-proof plate 603 through a damping shaft, and the right end of the shaft rod passes through the right side of the screening box 2 and is fixedly connected with a rotating handle. The leak-proof plate 603 is movably connected to the inner cavity of the front through groove 602, and the inner cavity of the rolling box 601 is movably connected to a support frame 604, and the inner cavity of the support frame 604 is movably connected to a rolling roller 605 through a bearing.

[0030] like Figure 1-5 As shown, the base 1 is used to support and fix the components on the top to improve the stability of each component when in use; the screening box 2 is used to provide screening space for fine powder to prevent dust from floating and reduce the waste of raw materials; the screen body 4 is used to screen the fine powder; the receiving box 3 is used to store the screened fine powder; after screening, the screened fine powder can be collected and processed by taking out the receiving box 3; the movable unit 5 can drive the screening box 2 to move back and forth, so as to better screen the fine powder with inertia, which not only speeds up the screening speed but also improves the screening effect; the crushing unit 6 can crush the agglomerates of larger particles screened out so as to perform secondary screening on them, thereby improving the utilization rate of raw materials and the quality of finished products, and effectively preventing the occurrence of particulate matter blocking the screen holes.

[0031] Example 2

[0032] Reference Figure 2 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0033] In this embodiment, a turntable 506 is provided at the upper end of the left side plate 501 , and a motor 507 is fixedly connected to the right side of the side plate 501 . The output shaft of the motor 507 passes through the side plate 501 and is transmission-connected to the right side of the turntable 506 .

[0034] A rotating frame 508 is movably connected to the left side of the side plate 501 and located between the movable column 503 and the turntable 506 through a movable pin. The top of the semi-toothed ring 504 is fixedly connected to the bottom of the rotating frame 508. A traction column 509 is slidably connected to the inner cavity of the rotating frame 508. The right end of the traction column 509 is fixedly connected to the turntable 506.

[0035] like Figure 2 As shown, when fine powder needs to be screened, the motor 507 is first started, and the output shaft of the motor 507 drives the turntable 506 to rotate, and the turntable 506 drives the traction column 509 to rotate. When the traction column 509 rotates, it can push the rotating frame 508 to make it reciprocate in an arc around the movable pin, and the rotating frame 508 can drive the semi-toothed ring 504 to reciprocate. Since the semi-toothed ring 504 is meshed with the rack 505, it can cooperate with the rack 505 when the semi-toothed ring 504 rotates. 505 drives the movable column 503 to move back and forth in the inner cavity of the support sleeve 502, thereby driving the screening box 2 to move. At this time, fine powder raw materials can be added to the interior of the screening box 2 through the feeding hopper 7, and the fine powder is screened by the screen body 4. After screening, qualified fine powder directly falls into the interior of the receiving box 3 and is stored by the receiving box 3. Fine powder with larger particles and agglomerated fine powder is accumulated on the upper end of the screen body 4 and is protected by the leak-proof plate 603 to prevent it from slipping.

[0036] Example 3

[0037] Reference Figure 1-5 , which is the third embodiment of the present invention, and this embodiment is based on the previous two embodiments.

[0038] In this embodiment, a slide groove 606 is opened on the top of the rolling box 601, and the inner cavity of the slide groove 606 is slidably connected to a pushing frame 607. The bottom of the pushing frame 607 extends to the inner cavity of the rolling box 601 and is fixedly connected to the top of the support frame 604.

[0039] The inner cavity of the rolling box 601 is movably connected with a scraper 608, and the back of the scraper 608 is fixedly connected with a push rod 609, and the rear end of the push rod 609 extends to the outside of the rolling box 601. The top of the screening box 2 is fixedly connected with a feeding hopper 7, and both sides of the back of the screening box 2 are fixedly connected with support columns 8, and the rear ends of the support columns 8 penetrate into the inner wall of the rolling box 601 and are slidably connected with the inner wall.

[0040] Both sides of the screening box 2 are fixedly connected with slide rails, and both sides of the material receiving box 3 are fixedly connected with sliders. One side of the slider extends to the inner cavity of the slide rail and is movably connected with the inner cavity of the slide rail. The front of the screening box 2 is movably connected with an anti-slip sheet 9 through a movable pin.

[0041] like Figure 1-5 As shown, when the agglomerated fine powder needs to be processed, first ensure that the back of the screening box 2 is in close contact with the front of the rolling box 601, then turn the rotating handle to adjust the angle of the leakproof plate 603 so that it rotates to the inside of the front through groove 602. At this time, the block particles will roll into the inside of the rolling box 601 through the front through groove 602, and then drive the rolling roller 605 to roll inside the rolling box 601 by pushing the pushing frame 607. While rolling, the rolling roller 605 can crush the granular raw materials. After rolling for a certain period of time, the scraper 608 can be driven to move inside the rolling box 601 by pulling the push rod 609. While moving, the crushed raw materials can be scraped out, and they can be screened again after scraping out.

[0042] A method for using a rare earth composite yttrium oxide setter plate ultrafine powder preparation standby screening device, the method comprising the following steps:

[0043] When fine powder needs to be screened, the motor 507 is first started. The output shaft of the motor 507 drives the turntable 506 to rotate, and the turntable 506 drives the traction column 509 to rotate. When the traction column 509 rotates, it can push the rotating frame 508 to make it reciprocate in an arc around the movable pin. The rotating frame 508 can also drive the semi-toothed ring 504 to reciprocate. Since the semi-toothed ring 504 is meshed with the rack 505, when the semi-toothed ring 504 rotates, it can cooperate with the rack 505 to drive the movable column 503 moves back and forth in the inner cavity of the support sleeve 502, thereby driving the screening box 2 to move. At this time, the fine powder raw material can be added to the inside of the screening box 2 through the feeding hopper 7, and the fine powder is screened by the screen body 4. After screening, the qualified fine powder directly falls into the inside of the receiving box 3 and is stored by the receiving box 3. The fine powder with larger particles and agglomerates is accumulated on the upper end of the screen body 4 and is protected by the leakproof plate 603 to prevent it from sliding. When the agglomerated fine powder needs to be processed , first ensure that the back of the screening box 2 is in close contact with the front of the rolling box 601, then turn the rotating handle to adjust the angle of the leak-proof plate 603 so that it rotates to the inside of the front through slot 602. At this time, the block particles will roll into the inside of the rolling box 601 through the front through slot 602, and then push the pushing frame 607 to drive the rolling roller 605 to roll inside the rolling box 601. The rolling roller 605 can crush the granular raw materials while rolling. After rolling for a certain period of time, the scraper 608 can be driven to move inside the rolling box 601 by pulling the push rod 609. While moving, the crushed raw materials can be scraped out and sieved again after scraping out. This solves the problem that yttrium oxide powder may agglomerate due to static electricity or humidity during the preparation process, resulting in large agglomerates between particles, which are difficult to screen through the sieve. This will not only affect the screening effect and cause uneven particle distribution, but may also cause the sieve holes to be blocked, affecting the normal screening work.

[0044] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rare earth composite yttrium oxide support plate ultrafine powder preparation and screening equipment, comprising a base (1), characterized in that: A screening box (2) is arranged at the front end of the top of the base (1), a material receiving box (3) is detachably connected to the bottom of the screening box (2), a screen body (4) is fixedly connected to the inner cavity of the screening box (2), a movable unit (5) is arranged on the left side of the base (1), and a rolling unit (6) is arranged at the rear end of the top of the base (1); The movable unit (5) comprises a side plate (501), the side plate (501) is located on the left side of the base (1) and is fixedly connected to the base (1), the front end and the rear end of the left lower end of the side plate (501) are fixedly connected to a support sleeve (502), the inner cavity of the support sleeve (502) is slidably connected to a movable column (503), the top of the movable column (503) is provided with a semi-toothed ring (504), the top of the movable column (503) is fixedly connected to a rack (505), the semi-toothed ring (504) and the rack (505) are meshed, and the front end of the rack (505) is fixedly connected to the left side of the screening box (2); The rolling unit (6) includes a rolling box (601), which is located at the rear end of the top of the base (1) and is fixedly connected to the base (1). The front and back sides of the rolling box (601) are provided with through grooves (602). The inner cavity of the discharge port on the back side of the screening box (2) is movably connected to a leak-proof plate (603) through a damping shaft, and the right end of the shaft rod passes through the right side of the screening box (2) and is fixedly connected to a rotating handle. The leak-proof plate (603) is movably connected to the inner cavity of the through groove (602) on the front side. The inner cavity of the rolling box (601) is movably connected to a support frame (604), and the inner cavity of the support frame (604) is movably connected to a rolling roller (605) through a bearing.

2. The screening equipment for preparing ultrafine powder of rare earth composite yttrium oxide support plate according to claim 1 is characterized in that: A turntable (506) is provided at the upper end of the left side of the side plate (501), and a motor (507) is fixedly connected to the right side of the side plate (501). The output shaft of the motor (507) passes through the side plate (501) and is drivingly connected to the right side of the turntable (506).

3. The screening equipment for preparing ultrafine powder of rare earth composite yttrium oxide support plate according to claim 2 is characterized in that: A rotating frame (508) is movably connected to the left side of the side plate (501) and located between the movable column (503) and the rotating disk (506) through a movable pin, the top of the semi-toothed ring (504) is fixedly connected to the bottom of the rotating frame (508), and a traction column (509) is slidably connected to the inner cavity of the rotating frame (508), and the right end of the traction column (509) is fixedly connected to the rotating disk (506).

4. The screening equipment for preparing ultrafine powder of rare earth composite yttrium oxide support plate according to claim 1 is characterized in that: A slide groove (606) is provided at the top of the rolling box (601), and a push frame (607) is slidably connected to the inner cavity of the slide groove (606). The bottom of the push frame (607) extends to the inner cavity of the rolling box (601) and is fixedly connected to the top of the support frame (604).

5. The screening equipment for preparing ultrafine powder of rare earth composite yttrium oxide support plate according to claim 1 is characterized in that: The inner cavity of the rolling box (601) is movably connected to a scraper (608), the back of the scraper (608) is fixedly connected to a push rod (609), the rear end of the push rod (609) extends to the outside of the rolling box (601), the top of the screening box (2) is fixedly connected to a feeding hopper (7), and both sides of the back of the screening box (2) are fixedly connected to support columns (8), the rear ends of the support columns (8) penetrate into the inner wall of the rolling box (601) and are slidably connected to the inner wall.

6. The screening equipment for preparing ultrafine powder of rare earth composite yttrium oxide setter plate according to claim 1, characterized in that: Both sides of the screening box (2) are fixedly connected to slide rails, and both sides of the material receiving box (3) are fixedly connected to sliders, one side of the slider extends to the inner cavity of the slide rail and is movably connected to the inner cavity of the slide rail. The front side of the screening box (2) is movably connected to an anti-slip sheet (9) via a movable pin.

7. A method for using a screening device for preparing ultrafine powder of rare earth composite yttrium oxide setter plate according to any one of claims 1 to 6, characterized in that: The steps for using it are as follows: A. When fine powder is to be screened, the motor (507) is first started. The output shaft of the motor (507) drives the turntable (506) to rotate. The turntable (506) then drives the traction column (509) to rotate. When the traction column (509) rotates, it can push the rotating frame (508) to make it reciprocate in an arc around the movable pin. The rotating frame (508) can also drive the half-toothed ring (504) to reciprocate. Since the half-toothed ring (504) is meshed with the rack (505), when the half-toothed ring (504) rotates, it can cooperate with the rack (505) to rotate. (505) drives the movable column (503) to move back and forth in the inner cavity of the support sleeve (502), thereby driving the screening box (2) to move. At this time, the fine powder raw material can be added to the inside of the screening box (2) through the feeding hopper (7), and the fine powder is screened by the screen body (4). After screening, the qualified fine powder directly falls into the inside of the receiving box (3) and is stored by the receiving box (3). The fine powder with larger particles and agglomerates is accumulated on the upper end of the screen body (4) and is protected by the leak-proof plate (603) to prevent it from sliding; B. When the agglomerated fine powder needs to be processed, first ensure that the back of the screening box (2) is in close contact with the front of the rolling box (601), then turn the rotating handle to adjust the angle of the leakproof plate (603) so that it rotates to the inside of the front through slot (602). At this time, the block particles will roll into the inside of the rolling box (601) through the front through slot (602), and then push the pushing frame (607) to drive the rolling roller (605) to roll inside the rolling box (601). While rolling, the rolling roller (605) can crush the granular raw materials. After rolling for a certain period of time, the scraper (608) can be driven to move inside the rolling box (601) by pulling the push rod (609). While moving, the crushed raw materials can be scraped out, and they can be screened again after being scraped out.

Images