Preparation device and method of wear-resistant and corrosion-resistant functional particles

Abstract

The application provides a preparation device and a preparation method of wear-resistant and corrosion-resistant functional particles, wherein the device body comprises a granulation chamber in a hollow barrel structure; the granulation chamber comprises a bottom plate, a feeding port, a discharging port, an exhaust port, a cooling nozzle, a fan device and a particle flow device; the cooling nozzle is arranged at the top of the granulation chamber; the fan device is arranged below the bottom plate; the particle flow device comprises a particle flow device A, a particle flow device B and a particle flow device C, which are sequentially fixed below the bottom plate, at the top of the granulation chamber and around the side wall of the granulation chamber. Through air feeding, feeding, air quenching granulation, high-speed particle flow impact, cooling, product screening and collection and spraying, an ellipsoidal particle with irregular concaves uniformly distributed on the surface and a particle size range of 0.1-3 mm is prepared, so that the particle has the properties of wear resistance and corrosion resistance. The application can prepare the required particles and improve the utilization rate of raw materials, thereby realizing benefit optimization.

Description

Technical Field

[0001] This invention relates to the field of new concrete material preparation, and in particular to an apparatus and method for preparing wear-resistant and corrosion-resistant functional particles. Background Technology

[0002] In practical applications, many roads use cement concrete. Cement concrete pavements are repeatedly subjected to the dual effects of wear and impact under the load of vehicles and wheels. The process begins with the severe wear and erosion of the mortar layer on the concrete surface, gradually exposing the coarse aggregate within the concrete and removing its mortar protection. Once most of the upper layer of coarse aggregate is exposed, the impact of vehicles causes it to loosen, creating mortar cavities on the concrete surface. Under this repeated impact, the thickness of the concrete pavement gradually decreases, losing its structural strength and leading to cracking, chipped edges, and other damage.

[0003] Therefore, there is an urgent need for a wear-resistant and corrosion-resistant functional particle that can replace the fine aggregate in mortar layers. This particle, further developed from tailings, is an ellipsoidal particle with a particle size ranging from 0.1 to 3 mm, and its surface is uniformly distributed with irregular depressions. Existing air quenching equipment can only produce spherical particles, and it is still lacking in forming uniform depressions on the particle surface. In view of this, a preparation device and method for wear-resistant and corrosion-resistant functional particles are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device and method for preparing wear-resistant and corrosion-resistant functional particles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for preparing wear-resistant and corrosion-resistant functional particles, comprising a device body, wherein the device body includes a granulation chamber; wherein the granulation chamber includes a bottom plate, a feed inlet, a discharge outlet, an exhaust outlet, a cooling nozzle, a fan device, and a particle flow device.

[0006] The feed inlet is located at the top of the side wall of the granulation chamber, and a pouring trough is provided outside the feed inlet; the exhaust port is located at the top of the side wall of the granulation chamber and is opposite to the feed inlet; the discharge port is located at the bottom of the granulation chamber below the exhaust port.

[0007] The cooling nozzle is located at the top of the granulation chamber, the fan device is located below the base plate, and the particle flow device includes particle flow device A, particle flow device B, and particle flow device C, which are fixedly installed sequentially below the base plate, at the top of the granulation chamber, and on the surrounding side walls of the granulation chamber.

[0008] The present invention first generates a high-pressure compressed airflow from bottom to top through a fan device below the bottom plate of the granulation chamber, causing the molten liquid stream poured from the feed port to form elliptical particles in the air; then, a particle flow is formed by the particle flow devices distributed at the top, bottom and around the granulation chamber, which impact the elliptical particles from various angles, thereby forming uniform irregular depressions; then, residual heat is cooled by a cooling nozzle, and the cooled particles are collected from the discharge port.

[0009] Furthermore, the fan device includes an air inlet, a ventilation duct, and a fan body. The air inlets are evenly distributed on the bottom plate of the granulation chamber, and the fan body is located on the outside of the granulation chamber. The fan body is connected to the air inlet through the ventilation duct, and the airflow path of the fan body entering the granulation chamber through the air inlet is vertically upward to ensure the formation of the elliptical structure.

[0010] Furthermore, the particle flow device includes a particle inlet and a high-speed particle emission device. The particle flow device A includes particle inlets A uniformly opened on the base plate, and each particle inlet A is surrounded by an air inlet to ensure the uniformity of particle flow impact. The particle flow device B includes particle inlets B uniformly arranged, and each particle inlet B is surrounded by a cooling nozzle.

[0011] Furthermore, the main body of the device also includes a screening device, which comprises, from top to bottom, a large-pore screen chamber, a medium-pore screen chamber, and a small-pore screen chamber. The large-pore screen chamber has an input end, and the large-pore screen chamber, the medium-pore screen chamber, and the small-pore screen chamber all have output ends. The input end is connected to the discharge port. A medium-pore screen with a aperture of 2.9-3.1 mm is provided between the large-pore screen chamber and the medium-pore screen chamber; a small-pore screen with a aperture of 0-0.2 mm is provided between the medium-pore screen chamber and the small-pore screen chamber. The screening device screens the initially produced particles. The large-pore screen chamber collects particles with a particle size larger than the maximum required particle size, which can be collected at the output end for further melting. The medium-pore screen chamber screens out particles that meet the requirements. The small-pore screen chamber screens out particles with a particle size smaller than the minimum required particle size, which can be transported to the particle flow device at the output end as impact particles. The screening device can screen out the required particles on the one hand, and improve the utilization rate of raw materials on the other hand.

[0012] Furthermore, the granulation chamber also includes a first filter and a second filter. The first filter has a pore size of 2.9-3.1 mm and is located on the side wall above the bottom plate of the granulation chamber. The coverage area of ​​the first filter is the transverse cross-section of the granulation chamber to ensure that particles meeting the size requirements can fall through. The end of the first filter away from the discharge port is rotatably connected to the side wall of the granulation chamber. After preparation, the first filter is rotated downwards to allow the filtered large particles to be discharged from the discharge port. The second filter has a pore size of 0-0.2 mm and is located on the surface of the bottom plate of the granulation chamber to filter out particles of 0.1-3 mm that meet the size requirements.

[0013] Furthermore, the bottom plate is angled, with the end furthest from the discharge port higher than the end closest to the discharge port, which facilitates particle collection.

[0014] Furthermore, the main body of the device includes a spraying chamber, the input end of which is connected to the output end of the medium-hole sieve chamber, to spray a wear-resistant and corrosion-resistant coating onto the surface of the particles that meet the requirements, thereby further ensuring the wear-resistant and corrosion-resistant performance of the particles.

[0015] A method for preparing wear-resistant and corrosion-resistant functional particles includes the following steps: S1. Air supply: Open the main body of the fan to allow high-pressure compressed air to enter the granulation chamber through the ventilation duct from the air inlet, forming an upward airflow in the granulation chamber; S2. Feeding: The molten liquid stream is poured from the pouring tank into the granulation chamber via an overhead crane; S3, air quenching granulation: The molten liquid stream flows into the granulation chamber from above through the pouring tank. Under the action of the high-speed airflow from bottom to top, the molten liquid stream forms elliptical-shaped particles in the air. S4. High-speed particle stream impact: When the particle stream device is turned on, particles with a diameter of less than 100μm are emitted from the inlet of the bottom plate, the top of the granulation chamber and the side walls of the granulation chamber, forming a high-speed particle stream that impacts the ellipsoidal particles formed in S3 and forms a dent. S5. Cooling: Open the cooling nozzle to cool the residual heat; S6. Material screening and collection: The particle flow device and the blower device are closed in sequence. The particles produced in S4 enter the screening device through the discharge port. The large-hole sieve chamber screens out particles with a diameter greater than 3 mm, the medium-hole sieve chamber screens out particles with a diameter between 0.1 and 3 mm, and the small-hole sieve chamber screens out particles with a diameter less than 0.1 mm. S7. Spraying: The particles screened out by the medium-hole sieve chamber in S6 are sent into the spraying chamber and sprayed with anti-corrosion and anti-wear coating.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention uses a bottom-mounted fan device to input a high-pressure compressed airflow from bottom to top into the granulation chamber, so that the molten liquid stream poured from the feed port forms elliptical particles in the air.

[0017] 2. The present invention forms a uniform particle flow by means of the particle flow devices distributed at the top, bottom and around the granulation chamber, which impact the ellipsoidal particles from various angles, thereby forming uniform irregular depressions.

[0018] 3. The screening device of the present invention can screen out the required particles with more precise size on the one hand, and improve the utilization rate of raw materials on the other hand, thereby optimizing efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device according to Embodiment 1 of the present invention; Figure 2 This is a flowchart illustrating the preparation process of Embodiment 2 of the present invention; Labeling Explanation: 1. Granulation Chamber; 2. Feed Inlet; 3. Exhaust Port; 4. Discharge Port; 5. Cooling Spray Nozzle; 6. Fan Body; 7. Particle Flow Device A; 8. Particle Flow Device C; 9. Particle Flow Device B; 10. Base Plate; 11. First Filter Screen; 12. Second Filter Screen; 13. Large Hole Screen Chamber; 14. Medium Hole Screen Chamber; 15. Small Hole Screen Chamber; 16. Sieving Device. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0026] like Figure 1 As shown, an apparatus for preparing wear-resistant and corrosion-resistant functional particles includes a main body, which includes a granulation chamber 1. The granulation chamber 1 includes a bottom plate 10, a feed inlet 2, a discharge outlet 4, an exhaust outlet 3, a cooling nozzle 5, a fan device, and a particle flow device.

[0027] The feed inlet 2 is located at the top of the side wall of the granulation chamber 1, and a pouring groove is provided on the outside of the feed inlet 2; the exhaust port 3 is located at the top of the side wall of the granulation chamber 1 and is opposite to the feed inlet 2; the discharge port 4 is located at the bottom of the granulation chamber 1 below the exhaust port 3.

[0028] The cooling nozzle 5 is located at the top of the granulation chamber 1, the fan device is located below the base plate 10, and the particle flow device includes particle flow device A7, particle flow device B9 and particle flow device C8, which are fixedly installed below the base plate 10, at the top of the granulation chamber 1 and on the four sides of the granulation chamber 1 in sequence.

[0029] The present invention first generates a high-pressure compressed airflow from bottom to top through a fan device below the bottom plate 10 of the granulation chamber 1, so that the molten liquid stream poured in from the feed port 2 forms ellipsoidal particles in the air; then, a particle flow is formed by particle flow devices distributed at the top, bottom and around the granulation chamber 1, which impact the ellipsoidal particles from various angles, thereby forming uniform irregular depressions; then, residual heat is cooled by the cooling nozzle 5, and the cooled particles are collected from the discharge port 4.

[0030] Furthermore, the fan device includes an air inlet, a ventilation duct, and a fan body 6. The air inlets are evenly distributed on the bottom plate 10 of the granulation chamber 1, and the fan body 6 is located on the outside of the granulation chamber 1. The fan body 6 is connected to the air inlet through the ventilation duct, and the airflow path of the fan body 6 entering the granulation chamber 1 through the air inlet is vertically upward to ensure the formation of the elliptical structure.

[0031] Furthermore, the particle flow device includes a particle inlet and a high-speed particle emission device. The particle flow device A7 includes particle inlets A that are uniformly opened on the base plate 10. Each particle inlet A is surrounded by an air inlet to ensure the uniformity of particle flow impact. The particle flow device B9 includes particle inlets B that are uniformly arranged. Each particle inlet B is surrounded by a cooling nozzle 5.

[0032] Furthermore, the main body of the device also includes a screening device 16, which, from top to bottom, includes a large-aperture screen chamber 13, a medium-aperture screen chamber 14, and a small-aperture screen chamber 15. The large-aperture screen chamber 13 has an input end, and the large-aperture screen chamber 13, the medium-aperture screen chamber 14, and the small-aperture screen chamber 15 all have output ends. The input end is connected to the discharge port 4. A medium-aperture screen with a mesh size of 2.9-3.1 mm is provided between the large-aperture screen chamber 13 and the medium-aperture screen chamber 14; a small-aperture screen with a mesh size of 0-0.2 mm is provided between the medium-aperture screen chamber 14 and the small-aperture screen chamber 15. The pre-formed particles are sieved using a screening device 16. Large-aperture sieve chamber 13 collects particles larger than the desired maximum particle size, which can be collected at the output end for further melting. Medium-aperture sieve chamber 14 screens out particles that meet the requirements. Small-aperture sieve chamber 15 screens out particles smaller than the desired minimum particle size, which can be conveyed to a particle flow device at the output end as impact particles. The screening device 16 not only filters out the desired particles but also improves the utilization rate of raw materials, thus optimizing efficiency.

[0033] Furthermore, the granulation chamber 1 also includes a first filter screen 11 and a second filter screen 12. The first filter screen 11 has a pore size of 2.9-3.1 mm and is located on the side wall above the bottom plate 10 of the granulation chamber 1. The coverage area of ​​the first filter screen 11 is the transverse cross-section of the granulation chamber 1 to ensure that particles that meet the size requirements can fall. The end of the first filter screen 11 away from the discharge port 4 is rotatably connected to the side wall of the granulation chamber 1. After preparation, the first filter screen 11 is rotated downward to allow the filtered large particles to be sent out from the discharge port 4. The second filter screen 12 has a pore size of 0-0.2 mm and is located on the surface of the bottom plate 10 of the granulation chamber 1 to filter out particles that meet the size requirements of 0.1-3 mm.

[0034] Furthermore, the bottom plate 10 is angled, with the end furthest from the discharge port 4 higher than the end closest to the discharge port 4, to facilitate particle collection. Furthermore, the main body of the device includes a spraying chamber, the input end of which is connected to the output end of the medium-hole sieve chamber 14, to spray a wear-resistant and corrosion-resistant coating onto the surface of the particles that meet the requirements, thereby further ensuring the wear-resistant and corrosion-resistant performance of the particles.

[0035] In the specific implementation of this invention, the operators first set the parameters of the blower device to ensure that the poured molten liquid stream can form an ellipsoidal structure. The blower body 6 is then turned on, generating a high-pressure compressed airflow from bottom to top in the granulation chamber 1. Next, the operators use an overhead crane to pour the molten tailings into a tank. The molten tailings enter the granulation chamber 1 through the feed inlet 2, forming a molten liquid stream under the influence of the head difference. Under the action of the high-speed airflow, the molten liquid stream forms ellipsoidal particles in the air. Then, the particle flow device is turned on, emitting ultra-high-speed particles with a particle size of less than 100μm. These particles can impact the ellipsoidal particles, creating indentations. The emitted particles will integrate with the installed ellipsoidal particles. Since the bottom plate 10, top, and surrounding side walls of the granulation chamber 1 are all uniformly equipped with particle flow device inlets, a uniform high-speed particle flow at various angles can be formed, resulting in uniform irregular indentations on the surface of the impacted ellipsoidal particles. Next, the cooling nozzle 5 is turned on for residual heat cooling, ensuring more complete granulation. After cooling, the fan, particle flow device, and cooling nozzle 5 are turned off. During this process, only particles smaller than 3mm can pass through the first filter screen 11, while particles smaller than 0.1mm are filtered out by the second filter screen 12. Only particles with a diameter range of 0.1-3mm can fall into the discharge port 4 and then be transported to the input end of the screening device 16, which is also the input end of the large-aperture screen chamber 13. Larger particles falling onto the first filter screen 11 can be controlled to rotate downwards, thus falling into the discharge port 4 and then being transported to the input end of the screening device.

[0036] Secondary screening is performed using screening device 16. Particles screened through large-aperture sieve chamber 13, with a particle size greater than the maximum required particle size (3mm), can be collected at the output end of large-aperture sieve chamber 13 for further melting. Particles screened through medium-aperture sieve chamber 14, with a particle size meeting the requirements, are transferred to the spraying chamber at the output end of medium-aperture sieve chamber 14 for spraying with anti-corrosion and anti-wear coating. Particles screened through small-aperture sieve chamber 15, with a particle size less than the minimum required particle size (0.1mm), can be conveyed to the particle flow device at the output end of small-aperture sieve chamber 15 for use as impact particles. This method allows for more precise screening of the required particles and improves the utilization rate of raw materials. Example

[0037] like Figure 1 , 2 As shown, a method for preparing wear-resistant and corrosion-resistant functional particles includes the following steps: S1. Air supply: Open the main body 6 of the blower to allow high-pressure compressed air to enter the granulation chamber 1 through the ventilation pipe from the air inlet, forming an upward airflow in the granulation chamber 1; S2. Feeding: The molten liquid stream is poured from the pouring tank into the granulation chamber 1 via an overhead crane; S3, air quenching granulation: The molten liquid stream flows into the granulation chamber 1 from above through the pouring tank. Under the action of the high-speed airflow from bottom to top, the molten liquid stream forms elliptical-shaped particles in the air. S4. High-speed particle stream impact: When the particle stream device is turned on, particles with a diameter of less than 100μm are emitted from the inlet of the bottom plate 10, the top of the granulation chamber 1 and the side walls of the granulation chamber 1, forming a high-speed particle stream that impacts the ellipsoidal particles formed in S3 and creates indentations. S5. Cooling: Open cooling nozzle 5 to cool the residual heat; S6. Material screening and collection: The particle flow device and the blower device are closed in sequence. The particles produced in S4 enter the screening device 16 through the discharge port 4. The large-hole screen chamber 13 screens out particles with a diameter greater than 3mm, the medium-hole screen chamber 14 screens out particles with a diameter between 0.1-3mm, and the small-hole screen chamber 15 screens out particles with a diameter less than 0.1mm. S7. Spraying: The particles separated by the medium-hole sieve chamber 14 in S6 are sent into the spraying chamber and sprayed with anti-corrosion and anti-wear coating.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for preparing wear-resistant and corrosion-resistant functional particles, characterized in that: The preparation steps of this wear-resistant and corrosion-resistant functional particle are as follows: S1. Air supply: Open the main body of the blower to allow high-pressure compressed air to enter the granulation chamber through the air inlet via the ventilation duct, forming an upward airflow in the granulation chamber; S2. Feeding: The molten liquid stream is poured from the pouring tank into the granulation chamber by means of an overhead crane; S3, air quenching granulation: The molten liquid stream flows into the granulation chamber from above through the pouring tank. Under the action of the high-speed airflow from bottom to top, the molten liquid stream forms elliptical-shaped particles in the air. S4. High-speed particle stream impact: The particle stream device is turned on, and particles with a diameter of less than 100μm are emitted from the bottom plate, the top of the granulation chamber and the side walls of the granulation chamber to form a high-speed particle stream, which impacts the ellipsoidal particles formed in S3 and forms a dent. S5. Cooling: Open the cooling nozzle to cool the residual heat; S6. Material screening and collection: The particle flow device and the blower device are closed in sequence. The particles produced in S4 enter the screening device through the discharge port. The large-hole screen chamber screens out particles with a diameter greater than 3mm, the medium-hole screen chamber screens out particles with a diameter between 0.1-3mm, and the small-hole screen chamber screens out particles with a diameter less than 0.1mm. S7. Spraying: The particles screened out by the medium-hole sieve chamber in S6 are sent into the spraying chamber and sprayed with anti-corrosion and anti-wear coating.

2. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 1, characterized in that: The preparation method uses a preparation apparatus including a main body, which includes a granulation chamber, which is a hollow barrel-shaped structure; the granulation chamber includes a bottom plate, a feed inlet, a discharge outlet, an exhaust outlet, a cooling nozzle, a fan device, and a particle flow device; The feed inlet is located at the top of the side wall of the granulation chamber and communicates with the granulation chamber. A pouring trough is provided outside the feed inlet. The exhaust port is located at the top of the side wall of the granulation chamber and is opposite to the feed inlet. The discharge port is located at the bottom of the granulation chamber below the exhaust port. The cooling nozzle is located at the top of the granulation chamber, the fan device is located below the base plate, and the particle flow device includes particle flow device A, particle flow device B and particle flow device C, which are fixedly located below the base plate, at the top of the granulation chamber and on the surrounding side walls of the granulation chamber in sequence. The blower generates a high-pressure compressed airflow from bottom to top, causing the molten liquid stream poured from the feed port to form ellipsoidal particles in the air; then, through the particle flow devices distributed at the top, bottom and around the granulation chamber, a particle flow is formed, which impacts the ellipsoidal particles from various angles, thereby forming uniform irregular depressions.

3. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 2, characterized in that: The fan device includes an air inlet, a ventilation duct, and a fan body. The air inlets are evenly distributed on the bottom plate of the granulation chamber, and the fan body is located on the outside of the granulation chamber. The fan body is connected to the air inlet through the ventilation duct, and the airflow path of the fan body entering the granulation chamber through the air inlet is vertically upward.

4. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 3, characterized in that: The particle flow device includes a particle inlet and a high-speed particle emission device. The particle flow device A includes particle inlets A uniformly arranged on the base plate, and each particle inlet A is surrounded by an air inlet. The particle flow device B includes particle inlets B uniformly arranged, and each particle inlet B is surrounded by a cooling nozzle.

5. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 2, characterized in that: The main body of the device also includes a screening device, which comprises, from top to bottom, a large-hole screen chamber, a medium-hole screen chamber, and a small-hole screen chamber. The large-hole screen chamber has an input end, and the large-hole screen chamber, the medium-hole screen chamber, and the small-hole screen chamber all have output ends. The input end is connected to the discharge port. A medium-hole screen with a aperture of 2.9-3.1 mm is provided between the large-hole screen chamber and the medium-hole screen chamber. A small-hole screen with a aperture of 0-0.2 mm is provided between the medium-hole screen chamber and the small-hole screen chamber.

6. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 2, characterized in that: The granulation chamber further includes a first filter screen and a second filter screen. The first filter screen has a pore size of 2.9-3.1 mm and is located on the side wall above the bottom plate of the granulation chamber. The end of the first filter screen away from the discharge port is rotatably connected to the side wall of the granulation chamber. The coverage area of ​​the first filter screen is the transverse cross-sectional area of ​​the granulation chamber. The second filter screen has a pore size of 0-0.2 mm and is located on the surface of the bottom plate of the granulation chamber.

7. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 2, characterized in that: The bottom plate is angled, with the end furthest from the discharge port higher than the end closest to the discharge port.

8. The method for preparing wear-resistant and corrosion-resistant functional particles as described in claim 5, characterized in that: The main body of the device includes a spraying chamber, the input end of which is connected to the output end of the medium-hole sieve chamber.

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