Powder processing and shaping device and magnesium oxide production system

Abstract

The present application relates to the technical field of grinding and crushing, and particularly relates to a powder processing and shaping device and a magnesium oxide production system. The powder processing and shaping device comprises a rack, a grinding cylinder and a screening mechanism. The screening mechanism comprises a fixed plate group, a material distribution ring and a synchronous ring. The fixed plate group is fixed to the rack, the synchronous ring is rotationally matched with the fixed plate group, and the fixed plate group and the synchronous ring define an annular material distribution chamber. The fixed plate group is provided with filter holes, a return port and a discharge port. The filter holes are provided on the side of the fixed plate group in the axial direction of the grinding cylinder, allowing the material to pass through and preventing the grinding balls from passing through. The grinding balls cannot directly hit the fixed plate group under the action of gravity, reducing the damage to the side of the fixed plate group where the filter holes are provided. The material distribution ring is arranged in the annular chamber and rotates with the synchronous ring to screen the material. The powder with qualified particle size can be discharged in time, and the unqualified material is returned to the grinding from the return port, without the need for an external conveying mechanism to return the unqualified material, and the structure is more compact and has high integration.

Description

Technical Field

[0001] This invention relates to the field of grinding and pulverizing technology, specifically to a powder processing and shaping device and a magnesium oxide production system. Background Technology

[0002] Powder processing and shaping generally refers to the control and processing of materials in terms of shape, size, and surface characteristics through powder technology and processes. This includes powder preparation and dispersion, mainly using physical dispersion methods to prepare raw materials into powder, ensuring the uniformity and fineness of powder particles. In industrial production, ball mills are commonly used to process powders. When the ball mill cylinder rotates, it drives the grinding balls inside to rotate. Under the action of inertia, centrifugal force, and friction, the grinding balls rotate with the cylinder to a certain height and then fall back under their own gravity, impacting the material inside the cylinder and crushing it.

[0003] In the prior art, in order to improve grinding efficiency and ensure that powder of qualified particle size is discharged in a timely manner, it is necessary to collect the powder during the grinding process. Usually, filter holes are opened on the peripheral wall of the grinding cylinder for sieving. However, since the grinding balls are relatively large, they are easy to damage the cylinder wall with filter holes when they impact the filter holes, which affects the service life of the grinding cylinder. Summary of the Invention

[0004] This invention provides a powder processing and shaping device and a magnesium oxide production system to solve the problem of damage to the cylinder wall caused by screening powder during the grinding process of existing ball mills.

[0005] The powder processing and shaping device and magnesium oxide production system of the present invention adopt the following technical solution:

[0006] A powder processing and shaping device includes a frame, a grinding cylinder, and a screening mechanism. The grinding cylinder is horizontally and rotatably mounted on the frame, and grinding balls for crushing materials are placed inside the grinding cylinder. The screening mechanism is located at the end of the grinding cylinder and includes a fixed plate assembly, a distribution ring, and a synchronization ring. The fixed plate assembly is fixed to the frame, and the synchronization ring rotatably engages with the fixed plate assembly, defining a horizontally axially horizontal and annular distribution chamber. The fixed plate assembly has filter holes, a return port, and a discharge port. The filter holes and the return port are located on the same side of the fixed plate assembly in the axial direction of the grinding cylinder, and are respectively located at the lower and upper parts of the fixed plate assembly, both connecting to the interior of the grinding cylinder and the distribution chamber. The filter holes allow material to pass through while obstructing the passage of grinding balls. The discharge port is located on the fixed plate assembly. On the upper part of the other side in the axial direction of the grinding cylinder; a distribution ring is set in the distribution chamber, including multiple distribution units connected in sequence around the distribution chamber. Each distribution unit includes a screen plate, a partition plate, and a side plate connected in sequence and distributed in a zigzag pattern. The screen plate is connected to the side plate of the adjacent distribution unit. The side plates of multiple distribution units are connected to a synchronization ring so that the distribution ring rotates synchronously with the synchronization ring. The screen plate, partition plate, and fixed plate group define the discharge space. The partition plate, side plate, screen plate of another distribution unit, and fixed plate group define the feed space. The feed space and the discharge space are connected through the screen plate. When the feed space moves to the lower part of the fixed plate group, it is connected to the inside of the grinding cylinder through filter holes. When the discharge space moves to the upper part of the fixed plate group, it is connected to the discharge port.

[0007] Optionally, the side plate includes a fixed part and an elastic part. The fixed part connects the partition plate to the screen plate of another material distribution unit. The elastic part is located on the side of the fixed part near the feeding space. The elastic part is connected to the fixed part and abuts against the screen plate of another material distribution unit on both sides of the circumferential direction of the material distribution chamber. The side wall of the end of the elastic part that abuts against the screen plate is connected to the synchronous ring, so that multiple material distribution units rotate synchronously with the synchronous ring. An elastic block is provided on the upper part of the side of the fixed plate assembly with the return port. The elastic block provides resistance to the rotation of one of the material distribution units, thereby causing the elastic part of the material distribution unit to arch under the drive of the synchronous ring, so that the material in the feeding space returns to the inside of the grinding cylinder from the return port. After the synchronous ring deforms the elastic part to a preset degree, it pushes the material distribution unit where the elastic part is located past the elastic block to continue rotating.

[0008] The fixed plate assembly includes a feed baffle, a discharge baffle, and a central retaining ring. The feed baffle and discharge baffle are parallel and spaced apart. The feed baffle is fixed to the frame. The central retaining ring is located between the feed baffle and the discharge baffle and is fixedly connected to them. A synchronizing ring is rotatably disposed outside the central retaining ring and defines the material distribution chamber with the feed baffle, discharge baffle, and central retaining ring. The feed baffle is disposed on the side of the discharge baffle near the grinding cylinder chamber. The filter holes and the return port are respectively opened at the lower and upper parts of the feed baffle. The discharge port is opened at the upper part of the discharge baffle.

[0009] Optionally, the screen plate, partition plate, and side plate are respectively attached to the central retaining ring and the synchronous ring at both ends in the radial direction of the synchronous ring, and the fixed part of the side plate is attached to the discharge baffle; the screen plate, partition plate, central retaining ring, synchronous ring, and discharge baffle define the discharge space; the partition plate, side plate, screen plate of another material distribution unit, central retaining ring, synchronous ring, and feed baffle define the feed space; the discharge port is opened on the upper part of the discharge baffle and is biased towards the side of the material distribution ring that rotates from bottom to top, the included angle between the screen plate and the partition plate near the discharge baffle is an acute angle; the included angle between the partition plate and the side plate near the feed baffle is an obtuse angle.

[0010] Optionally, the elastic block abuts against the screen plate or partition to provide resistance to the rotation of the material distribution unit, and the end of the elastic block abutting against the screen plate or partition is spherical.

[0011] Optionally, a discharge pipe connected to the outside of the grinding cylinder is connected to the discharge baffle, and the discharge pipe is connected to the discharge port.

[0012] Optionally, the sieve plate is arranged radially along the synchronization ring and parallel to the axial direction of the synchronization ring.

[0013] Optionally, the filter holes are located at an eccentric position below the feed baffle, and are adapted to the position where the grinding balls accumulate inside the grinding cylinder when the grinding cylinder rotates.

[0014] Optionally, the feed baffle is annular, and a rotating ring is provided on the outer sleeve of the feed baffle, which connects the feed baffle to the frame; the inner ring of the rotating ring is provided with rollers for rotating and engaging with the grinding cylinder and the synchronization ring.

[0015] A magnesium oxide production system includes the aforementioned powder processing and shaping device, and further includes a hopper, a feeding mechanism, and a discharging mechanism. The feeding mechanism and the discharging mechanism are both mounted on the frame, and the feeding mechanism is located at the end of the grinding cylinder away from the screening mechanism, for conveying materials into the grinding cylinder; the discharging mechanism is located at the end of the grinding cylinder where the screening mechanism is located, and is connected to the discharge port; the hopper is used to convey materials to the feeding mechanism.

[0016] The beneficial effects of the present invention are: the filter holes of the powder processing and shaping device of the present invention are opened on the side of the fixed plate assembly in the axial direction of the grinding cylinder, so that the grinding balls will not directly impact the fixed plate assembly under the action of gravity, thereby reducing the damage to the side of the fixed plate assembly where the filter holes are opened.

[0017] Furthermore, by setting up a material distribution ring to screen the material during the grinding process, the qualified particle size powder is discharged in time, and the unqualified material is returned to the grinding. This not only avoids the qualified powder from being over-crushed and affecting the grinding efficiency, but also allows the unqualified material to be directly returned to the grinding cylinder without the need for an external conveying mechanism to return the unqualified material. The structure is more compact and has a high degree of integration.

[0018] Furthermore, the rotation of the distribution ring continuously carries out powder of the correct particle size, ensuring efficient discharge even when there is little material inside the grinding cylinder.

[0019] Furthermore, by setting an elastic block to provide resistance to the rotation of one of the feeding units, the rotation speed of the feeding unit can be reduced, making it easier for unqualified materials in the feeding space to return to the inside of the grinding cylinder. At the same time, the elastic part can be deformed to push the material out of the feeding space, reducing the material residue in the feeding space. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a magnesium oxide production system according to the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of a magnesium oxide production system according to the present invention;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of a screening mechanism in an embodiment of a powder processing and shaping device of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram of the screening mechanism in an embodiment of a powder processing and shaping device of the present invention;

[0026] Figure 6 This is a split schematic diagram of the screening mechanism in an embodiment of a powder processing and shaping device of the present invention;

[0027] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 This is a split schematic diagram of the screening mechanism from another perspective in an embodiment of a powder processing and shaping device of the present invention;

[0029] Figure 9 for Figure 8 Enlarged diagram of point C in the middle.

[0030] In the diagram: 100, hopper; 200, feeding mechanism; 300, frame; 400, grinding cylinder; 500, screening mechanism; 510, feed baffle; 511, filter hole; 512, return port; 513, elastic block; 520, distribution ring; 521, sieve plate; 522, partition plate; 523, side plate; 524, fixed part; 525, elastic part; 530, discharge baffle; 531, discharge port; 532, discharge pipe; 540, synchronization ring; 550, center retaining ring; 560, rotating ring; 561, roller; 570, transmission ring; 600, discharge mechanism. Detailed Implementation

[0031] 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.

[0032] An embodiment of the powder processing and shaping apparatus of the present invention, such as... Figures 1 to 9 As shown, it includes a frame 300, a grinding cylinder 400, and a screening mechanism 500.

[0033] The grinding cylinder 400 is horizontally and rotatably mounted on the frame 300. Grinding balls (not shown in the figure) for crushing materials are placed inside the grinding cylinder 400. A gear ring is provided on the outside of the grinding cylinder 400. The grinding cylinder 400 can be driven to rotate by a first motor (not shown in the figure) mounted on the frame 300. Specifically, a synchronous pulley is installed on the output shaft of the first motor, and the synchronous pulley and the gear ring on the outside of the grinding cylinder 400 are connected and driven by a synchronous belt.

[0034] The screening mechanism 500 is located at the end of the grinding cylinder 400 and includes a fixed plate assembly, a distribution ring 520, and a synchronization ring 540. The fixed plate assembly is fixed to the frame 300, and the synchronization ring 540 is rotatably engaged with the fixed plate assembly, defining a horizontally axially parallel and annular distribution chamber. The fixed plate assembly has a filter hole 511, a return port 512, and a discharge port 531. The filter hole 511 and the return port 512 are located on the same side of the fixed plate assembly in the axial direction of the grinding cylinder 400, respectively at the lower and upper parts of the fixed plate assembly, and both connect to the interior of the grinding cylinder 400 and the distribution chamber. The filter hole 511 allows material to pass through while obstructing the passage of grinding balls. The discharge port 531 is located on the upper part of the other side of the fixed plate assembly in the axial direction of the grinding cylinder 400.

[0035] The material distribution ring 520 is disposed in the material distribution chamber and includes multiple material distribution units connected sequentially around the circumference of the material distribution chamber. Each material distribution unit includes a screen plate 521, a partition plate 522, and a side plate 523 connected sequentially and arranged in a zigzag pattern. The screen plate 521 is connected to the side plate 523 of the adjacent material distribution unit. The side plates 523 of multiple material distribution units are all connected to a synchronization ring 540 so that the material distribution ring 520 rotates synchronously with the synchronization ring 540. The screen plate 521, the partition plate 522, and the fixed plate group define the discharge space. The partition plate 522, the side plate 523, the screen plate 521 of another material distribution unit, and the fixed plate group define the feed space. The feed space and the discharge space are connected through the screen plate 521. When the feed space moves to the lower part of the fixed plate group, it communicates with the inside of the grinding cylinder 400 through the filter hole 511. When the discharge space moves to the upper part of the fixed plate group, it communicates with the discharge port 531.

[0036] When the grinding cylinder 400 rotates around its own axis, it drives the grinding balls inside to roll. The grinding balls collide with each other and crush the material. When the distribution ring 520 rotates to the point where it connects with the inside of the grinding cylinder 400 through the filter hole 511, the material enters the feeding space through the filter hole 511. As the distribution ring 520 continues to rotate, powder of the qualified particle size enters the discharge space through the sieve plate 521. When the discharge space connects with the discharge port 531, the powder of the qualified particle size is discharged from the discharge port 531. The material of the unqualified particle size that remains in the feeding space returns to the grinding cylinder 400 through the return port 512 when it rotates with the distribution ring 520 to continue grinding. This cycle repeats. The filter hole 511 is opened on the side of the fixed plate assembly in the axial direction of the grinding cylinder 400. The grinding balls will not directly impact the fixed plate assembly under its gravity, reducing damage to the side of the fixed plate assembly where the filter hole 511 is opened. Furthermore, by setting up a distribution ring 520 to screen the material during the grinding process, powder of qualified particle size is discharged in a timely manner, while unqualified material is returned to the grinding mill. This avoids over-grinding of qualified powder, which would affect grinding efficiency, and allows unqualified material to be directly returned to the grinding cylinder 400 without the need for an external conveying mechanism. The structure is more compact and highly integrated. Furthermore, the rotation of the distribution ring 520 continuously carries out powder of qualified particle size, ensuring efficient discharge even when the material level in the grinding cylinder 400 is low.

[0037] In this embodiment, the side plate 523 includes a fixing part 524 and an elastic part 525. The fixing part 524 connects the partition plate 522 to the screen plate 521 of another material distribution unit. The elastic part 525 is located on the side of the fixing part 524 near the feeding space, and the elastic part 525 is connected to the fixing part 524 and abuts against the screen plate 521 of another material distribution unit on both sides of the circumferential direction of the material distribution chamber. The side wall of the end of the elastic part 525 that abuts against the screen plate 521 is connected to the synchronization ring 540, so that multiple material distribution units rotate synchronously with the synchronization ring 540. An elastic block 513 is provided on the upper part of the side of the fixing plate assembly where the return port 512 is opened. The elastic block 513 provides resistance to the rotation of one of the material distribution units, thereby causing the elastic part 525 of the material distribution unit to arch under the drive of the synchronization ring 540, so that the material in the feeding space returns from the return port 512 to the inside of the grinding cylinder 400. Furthermore, the synchronization ring 540 deforms the elastic part 525 to a preset degree and then pushes the material distribution unit containing the elastic part 525 past the elastic block 513 to continue rotating. By setting the elastic block 513 to provide resistance to the rotation of one of the material distribution units, the rotation speed of the material distribution unit can be reduced, making it easier for unqualified materials in the feeding space to return to the inside of the grinding cylinder 400. At the same time, the elastic part 525 can be deformed to push the material out of the feeding space, reducing the material residue in the feeding space.

[0038] In this embodiment, the fixed plate assembly includes a feed baffle 510, a discharge baffle 530, and a central retaining ring 550. The feed baffle 510 and the discharge baffle 530 are parallel and spaced apart. The feed baffle 510 is fixed to the frame 300, and the central retaining ring 550 is located between the feed baffle 510 and the discharge baffle 530 and is fixedly connected to them. Specifically, the feed baffle 510 and the discharge baffle 530 work together to block the end of the grinding cylinder 400. The fixed connection between the feed baffle 510 and the frame 300 does not affect the rotation of the grinding cylinder 400. A synchronizing ring 540 is rotatably disposed outside the central retaining ring 550 and, together with the feed baffle 510, the discharge baffle 530, and the central retaining ring 550, defines the material distribution chamber. The synchronous ring 540 is fixedly fitted with a transmission ring 570, and a gear ring is provided on the outside of the transmission ring 570. The transmission ring 570 can be driven to rotate by a second motor (not shown in the figure) installed on the frame 300, which in turn drives the synchronous ring 540 to rotate. Specifically, a pulley is installed on the output shaft of the second motor, and the pulley and the gear ring on the outside of the transmission ring 570 are connected by a synchronous belt. The feed baffle 510 is located on the side of the discharge baffle 530 near the chamber of the grinding cylinder 400. The filter hole 511 and the return port 512 are respectively opened at the lower and upper parts of the feed baffle 510; the discharge port 531 is opened at the upper part of the discharge baffle 530.

[0039] In this embodiment, the two ends of the sieve plate 521, partition plate 522, and side plate 523 in the radial direction of the synchronization ring 540 are respectively attached to the central retaining ring 550 and the synchronization ring 540, and the fixing part 524 of the side plate 523 is attached to the discharge baffle 530. The sieve plate 521, partition plate 522, central retaining ring 550, synchronization ring 540, and discharge baffle 530 define the discharge space; the partition plate 522, side plate 523, sieve plate 521, central retaining ring 550, synchronization ring 540 of another material distribution unit, and feed baffle 510 define the feed space. The discharge port 531 is located on the upper part of the discharge baffle 530 and is biased towards the side of the material distribution ring 520 that rotates from bottom to top. The angle between the screen plate 521 and the partition plate 522 near the discharge baffle 530 is an acute angle. This allows powder of qualified particle size to be discharged from the discharge port 531 along the inclined discharge baffle 530 when the discharge space rotates to connect with the discharge port 531. The fact that the discharge port 531 is located on the upper part of the discharge baffle 530 and biased towards the side of the material distribution ring 520 that rotates from bottom to top prevents powder of qualified particle size from returning to the feeding space from the screen plate 521 when the discharge space rotates to the position of the screen plate 521 below the partition plate 522. The angle between the partition 522 and the side plate 523 near the feed baffle 510 is an obtuse angle, so that when the feed space rotates to connect with the return port 512, the side of the partition 522 can guide the material in the feed space back into the grinding cylinder 400.

[0040] In this embodiment, the elastic block 513 abuts against the sieve plate 521 or the partition plate 522 to provide resistance to the rotation of the material distribution unit, and the end of the elastic block 513 that abuts against the sieve plate 521 or the partition plate 522 is spherical.

[0041] In this embodiment, the discharge baffle 530 is connected to a discharge pipe 532 that communicates with the outside of the grinding cylinder 400. The discharge pipe 532 is connected to the discharge port 531 to guide the powder of qualified particle size to be discharged.

[0042] In this embodiment, the screen plate 521 is arranged radially along the synchronization ring 540 and parallel to the axial direction of the synchronization ring 540, so as to maximize the effective screening area of ​​the screen plate 521 and avoid the material in the feeding space from accumulating on one side of the screen plate 521 under the action of gravity.

[0043] In this embodiment, the filter holes 511 are located at an eccentric position at the lower part of the feed baffle 510, and are adapted to the accumulation position of the grinding balls inside the grinding cylinder 400 when the grinding cylinder 400 rotates. Specifically, if the axial direction of the grinding cylinder 400 is the front-to-back direction, when the grinding cylinder 400 rotates in a counterclockwise direction viewed from the front to the back, the grinding balls and materials inside the grinding cylinder 400 will accumulate on the lower right side of the grinding cylinder 400 as the grinding cylinder 400 rotates. There are multiple filter holes 511, all located on the lower right side of the feed baffle 510, so that more material can pass through the filter holes 511 more easily.

[0044] In this embodiment, the feed baffle 510 is annular, and a rotating ring 560 is provided on the outer sleeve of the feed baffle 510. The rotating ring 560 connects the feed baffle 510 and the frame 300. A roller 561 is provided on the inner ring of the rotating ring 560 for rotating cooperation with the grinding cylinder 400 and the synchronization ring 540.

[0045] In use, the powder processing and shaping device of the present invention involves adding the material (raw material) into the grinding cylinder 400, then starting the first and second motors, causing both the grinding cylinder 400 and the synchronization ring 540 to rotate. The grinding cylinder 400 drives the grinding balls inside to rotate and collide with each other to crush the material. Some material enters the feeding space through the filter holes 511. As the distribution ring 520 rotates with the synchronization ring 540, it drives the material in the feeding space to move synchronously. Powder with qualified particle size enters the discharge space through the sieve plate 521. When the discharge space rotates to correspond with the discharge port 531, the powder with qualified particle size is discharged from the discharge port 531. When material that has not passed through the sieve plate 521 rotates in the feed space to correspond with the return port 512, the sieve plate 521 or partition plate 522 constituting the feed space is blocked by the elastic block 513. The elastic part 525 of the side plate 523 constituting the feed space deforms under the drive of the synchronization ring 540, pushing the remaining material in the feed space back into the grinding cylinder 400 through the return port 512. The multiple feed spaces of the distribution ring 520 carry a portion of the material for screening in sequence, screening qualified particle size powder without affecting the grinding process.

[0046] A magnesium oxide production system includes the aforementioned powder processing and shaping device, and further includes a hopper 100, a feeding mechanism 200, and a discharging mechanism 600. Both the feeding mechanism 200 and the discharging mechanism 600 are mounted on a frame 300. The feeding mechanism 200 is located at the end of the grinding cylinder 400 away from the screening mechanism 500, and is used to convey material into the grinding cylinder 400. The discharging mechanism 600 is located at the end of the grinding cylinder 400 where the screening mechanism 500 is located and is connected to the discharge port 531. The hopper 100 is used to convey material to the feeding mechanism 200. Both the feeding mechanism 200 and the discharging mechanism 600 are auger conveyors. In the magnesium oxide production process, the raw material needs to undergo crushing, screening, shaping, magnetic separation, modification, and restoration processes to obtain medium- and low-temperature electrical grade magnesium oxide products. When processing high-temperature electrical grade magnesium oxide products, high-temperature heat treatment and cooling processes need to be added before modification. The magnesium oxide production system of this application mainly involves crushing, screening and shaping raw materials in the crushing workshop. The entire crushing and screening process is carried out in the grinding drum 400 and the material distribution chamber, which can greatly reduce dust in the workshop.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 powder processing and shaping apparatus, characterized by: Includes frame, grinding cylinder and screening mechanism; The grinding cylinder is horizontally and rotatably mounted on the frame, and grinding balls for crushing materials are placed inside the grinding cylinder; The screening mechanism is located at the end of the grinding cylinder and includes a fixed plate assembly, a distribution ring, and a synchronization ring. The fixed plate assembly is fixed to the frame, and the synchronization ring rotates with the fixed plate assembly, defining a horizontally oriented and annular distribution chamber. The fixed plate assembly has filter holes, a return port, and a discharge port. The filter holes and the return port are located on the same side of the fixed plate assembly in the axial direction of the grinding cylinder, and are located at the lower and upper parts of the fixed plate assembly, respectively. Both of them connect to the interior of the grinding cylinder and the distribution chamber. The filter holes allow material to pass through while preventing the grinding balls from passing through. The discharge port is located on the upper part of the other side of the fixed plate assembly in the axial direction of the grinding cylinder. The material distribution ring is located in the material distribution chamber and includes multiple material distribution units connected sequentially around the circumference of the material distribution chamber. Each material distribution unit includes a screen plate, a partition plate, and a side plate that are connected sequentially and arranged in a zigzag pattern. The screen plate is connected to the side plate of the adjacent material distribution unit. The side plates of multiple material distribution units are connected to a synchronization ring so that the material distribution ring rotates synchronously with the synchronization ring. The screen plate, partition plate, and fixed plate group define the discharge space. The partition plate, side plate, screen plate of another material distribution unit, and fixed plate group define the feed space. The feed space and the discharge space are connected through the screen plate. When the feed space moves to the lower part of the fixed plate group, it is connected to the inside of the grinding cylinder through filter holes. When the discharge space moves to the upper part of the fixed plate group, it is connected to the discharge port. The side plate includes a fixed part and an elastic part. The fixed part connects the partition plate to the screen plate of another material distribution unit. The elastic part is located on the side of the fixed part near the feeding space. The elastic part is connected to the fixed part and abuts against the screen plate of another material distribution unit on both sides of the circumferential direction of the material distribution chamber. The side wall of the elastic part that abuts against the screen plate is connected to the synchronous ring, so that multiple material distribution units rotate synchronously with the synchronous ring. An elastic block is provided on the upper part of the side of the fixed plate assembly with the return port. The elastic block provides resistance to the rotation of one of the material distribution units, thereby causing the elastic part of the material distribution unit to arch under the drive of the synchronous ring, so that the material in the feeding space returns to the inside of the grinding cylinder from the return port. After the synchronous ring deforms the elastic part to a preset degree, it pushes the material distribution unit where the elastic part is located past the elastic block to continue rotating.

2. A powder processing and shaping apparatus according to claim 1, wherein: The fixed plate assembly includes a feed baffle, a discharge baffle, and a central retaining ring. The feed baffle and discharge baffle are parallel and spaced apart. The feed baffle is fixed to the frame. The central retaining ring is located between the feed baffle and the discharge baffle and is fixedly connected to them. A synchronizing ring is rotatably disposed outside the central retaining ring and defines the material distribution chamber with the feed baffle, discharge baffle, and central retaining ring. The feed baffle is disposed on the side of the discharge baffle near the grinding cylinder chamber. The filter holes and the return port are respectively opened at the lower and upper parts of the feed baffle. The discharge port is opened at the upper part of the discharge baffle.

3. A powder processing and shaping apparatus according to claim 2, wherein: The screen plate, partition plate, and side plate are respectively attached to the central retaining ring and the synchronous ring at both ends of the radial direction of the synchronous ring, and the fixed part of the side plate is attached to the discharge baffle; the screen plate, partition plate, central retaining ring, synchronous ring, and discharge baffle define the discharge space; the partition plate, side plate, screen plate of another material distribution unit, central retaining ring, synchronous ring, and feed baffle define the feed space; the discharge port is opened on the upper part of the discharge baffle and is biased towards the side of the material distribution ring that rotates from bottom to top, the angle between the screen plate and the partition plate near the discharge baffle is an acute angle; the angle between the partition plate and the side plate near the feed baffle is an obtuse angle.

4. The powder processing and shaping apparatus of claim 1, wherein: The elastic block abuts against the screen plate or partition to provide resistance to the rotation of the material distribution unit, and the end of the elastic block that abuts against the screen plate or partition is spherical.

5. The powder processing and shaping apparatus of claim 2, wherein: The discharge baffle is connected to a discharge pipe that communicates with the outside of the grinding cylinder, and the discharge pipe is connected to the discharge port.

6. The powder processing and shaping apparatus of claim 1, wherein: The sieve plate is arranged radially along the synchronization ring and parallel to the axial direction of the synchronization ring.

7. A powder processing and shaping apparatus according to claim 2, wherein: The filter holes are located at an eccentric position below the feed baffle, and are adapted to the position where the grinding balls accumulate inside the grinding cylinder when it rotates.

8. A powder processing and shaping apparatus according to claim 2, wherein: The feed baffle is annular, and a rotating ring is provided on the outer sleeve of the feed baffle. The rotating ring connects the feed baffle to the frame. Rollers are provided on the inner ring of the rotating ring for rotating cooperation with the grinding cylinder and the synchronization ring.

9. A magnesium oxide production system comprising a powder processing and shaping device according to any one of claims 1 to 8, characterized in that: It also includes a hopper, a feeding mechanism, and a discharging mechanism. The feeding mechanism and the discharging mechanism are both installed on the frame. The feeding mechanism is located at the end of the grinding cylinder away from the screening mechanism and is used to convey materials into the grinding cylinder. The discharging mechanism is located at the end of the grinding cylinder where the screening mechanism is located and is connected to the discharge port. The hopper is used to convey materials to the feeding mechanism.

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