White corundum intelligent granulation equipment based on multistage particle size regulation and precise sorting method

Abstract

The invention discloses intelligent white corundum granulating equipment based on multistage particle size regulation and a precise sorting method. A cooling forming mechanism, a crushing mechanism, a smashing mechanism and a grading screening mechanism are sequentially arranged on a base from front to back. The cooling crystallization process is controllable, the problem that the thickness of white corundum crystals formed by natural cooling is not uniform is avoided, a large number of non-standard granularity materials generated in the subsequent crushing link are reduced, the utilization rate of raw materials is increased, and the waste cost of the raw materials is reduced; and the grinding steel balls with different sizes can be selected as required for auxiliary grinding, so that the intelligent crushing operation of multi-stage particle size regulation and control of the white corundum is realized. During grading screening, the working state of the screen is adjusted through the auxiliary motor, white corundum products with different particle sizes can be accurately screened out, and the strict requirements of high-end manufacturing industries such as semiconductors and precision optics for the particle sizes of the white corundum are met.

Description

Technical Field

[0001] This invention belongs to the technical field of white fused alumina production equipment, specifically relating to a smart granulation equipment and precise sorting method for white fused alumina based on multi-stage particle size control. Background Technology

[0002] White fused alumina, as a core raw material for high-performance abrasives and refractory materials, has a production process that encompasses key steps such as raw material smelting, crystallization, crushing, and screening. In the traditional production process, the smelted white fused alumina needs to be naturally cooled to form plate-shaped crystals, then subjected to primary crushing by a jaw crusher, followed by pulverization by a ball mill or air jet mill, and finally particle size classification by a vibrating screen.

[0003] However, this traditional process has significant technical bottlenecks: 1. Uncontrollable cooling and crystallization process: The thickness of the white fused alumina crystals formed by natural cooling is uneven (usually fluctuating within the range of 50-300mm), resulting in a large amount of non-standard particle size material in the subsequent crushing stage; 2. Low crushing efficiency: Jaw crushers are used to crush naturally cooled blocky white fused alumina, and the crushing ratio can usually only reach 3:1, requiring repeated crushing to meet the feed requirements of the grinding mill; 3. The white fused alumina produced by the grinding mill has a uniform particle size, requiring different grinding mills to be used for different specifications of white fused alumina powder; 4. Lack of multi-stage particle size screening control: Traditional vibrating screens use fixed screening modes for grading and screening, which cannot achieve intelligent control of screening and cannot meet the stringent requirements of high-end manufacturing industries such as semiconductors and precision optics for white fused alumina particle size. Summary of the Invention

[0004] This invention provides an intelligent granulation equipment and precise sorting method for white fused alumina based on multi-stage particle size control. It integrates precise temperature control cooling, step-by-step crushing, intelligent pulverization, and intelligent screening into a single process. The cooling and crystallization process is controllable, avoiding the problem of uneven thickness of white fused alumina crystals formed by natural cooling. This reduces the large amount of non-standard particle size material generated in subsequent crushing stages, improving raw material utilization and reducing raw material waste costs. Different sized grinding steel balls can be selected for auxiliary grinding as needed, achieving intelligent pulverization with multi-stage particle size control for white fused alumina. During grading and screening, the operating state of the screen is adjusted by an auxiliary motor, enabling precise screening of white fused alumina products of different particle sizes to meet the stringent particle size requirements of high-end manufacturing industries such as semiconductors and precision optics.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The intelligent granulation equipment for white corundum based on multi-stage particle size control includes a base, on which a cooling and forming mechanism, a crushing mechanism, a pulverizing mechanism, and a grading and screening mechanism are arranged sequentially from front to back. The cooling and forming mechanism includes a mounting frame and a cooling box. The cooling box is rotatably mounted on the mounting frame. A forming box is located inside the cooling box. The top of the forming box extends out of the cooling box. A cooling cavity is provided between the cooling box and the forming box. The cooling box is provided with a cold source inlet and a cold source outlet. The forming box has a mold cavity with an open top. The crushing mechanism includes a conveyor belt with a protective cover. Inside the protective cover, from front to back, there are a main crushing roller and a secondary crushing roller. A first motor is located on the side of the protective cover. The main shaft of the first motor is fixedly connected to the main shaft of the main crushing roller. The main crushing roller drives the secondary crushing roller to rotate through a transmission belt. A first material box is located at the rear of the conveyor belt, and a first conveyor is located on the first material box. The crushing mechanism includes a crushing barrel, with mounting plates on the left and right sides, spring-loaded support legs on the mounting plates, a vibrating motor at the bottom of the crushing barrel, a feed inlet and a discharge outlet, the feed inlet being connected to a first conveyor, a second material box at the rear of the crushing barrel, and a second conveyor on the second material box; the grading and screening mechanism includes a screening box, with a detachable feed pipe at the top of the screening box, the feed pipe being connected to the second conveyor, and a magnetic adsorption layer inside the feed pipe.

[0006] The bottom of the cooling box is provided with an arc-shaped gear track, and a drive motor is provided on the base at the bottom of the cooling box. The main shaft of the drive motor is provided with a drive gear, which meshes with the gear track for transmission.

[0007] The bottom of the molding box cavity is provided with a push plate, and the bottom of the molding box is provided with a telescopic push rod, the telescopic end of which is connected to the bottom of the push plate.

[0008] The main crushing roller is provided with large particle crushing protrusions, and the auxiliary crushing roller is provided with small particle crushing protrusions. Both the large particle crushing protrusions and the small particle crushing protrusions are magnetic crushing protrusions.

[0009] The inner cavity of the crushing barrel is provided with a wear-resistant layer. A first electromagnet is provided on the left side between the crushing barrel and the wear-resistant layer, and a second electromagnet is provided on the right side between the crushing barrel and the wear-resistant layer. Several small grinding steel balls are attracted to the first electromagnet, and several large grinding steel balls are attracted to the second electromagnet.

[0010] The bottom of the crushing barrel is provided with a first adjustment structure, a second adjustment structure and a third adjustment structure. The first adjustment structure, the second adjustment structure and the third adjustment structure have the same external structure. The first adjustment structure includes an adjustment motor. A pull rope is provided on the main shaft of the adjustment motor. The first adjustment structure is connected to the bottom rear side of the crushing barrel. The second adjustment structure is connected to the middle position of the mounting plate on the left side of the crushing barrel. The third adjustment structure is connected to the middle position of the mounting plate on the right side of the crushing barrel.

[0011] Both the inlet and outlet of the crushing barrel are equipped with electric valves.

[0012] The screening box is a multi-stage screening box with multiple screens arranged from top to bottom. A rotating shaft is provided on one side edge of each screen, and the rotating shaft is rotatably mounted on the screening box in the front-back direction. The rear end of the rotating shaft extends out of the screening box and is provided with an adjusting gear. Several auxiliary motors corresponding to the adjusting gears are provided on the side of the screening box. The main shaft of the auxiliary motor is provided with auxiliary gears, which mesh with the adjusting gears for transmission. The adjusting gears drive the rotating shaft to rotate and adjust the screens to be in a horizontal screening state or a vertical non-screening state.

[0013] The bottom of the screening box is equipped with a waste collection port.

[0014] The precise sorting method of white fused alumina intelligent granulation equipment based on multi-stage particle size control includes the following steps: 1. Cooling and Forming: The molten white fused alumina is poured into the mold cavity of the forming box. The mold cavity is designed as a thin rectangular plate structure to facilitate rapid and uniform cooling. The cooling box is connected to an external cold source device through its cold source inlet and outlet. The cold source enters the cooling chamber between the cooling box and the forming box to precisely control the temperature of the white fused alumina. During the cooling process, temperature and flow sensors monitor and provide feedback data in real time. Operators can adjust the temperature and flow rate of the cold source as needed to control the crystal size and mechanical properties of the white fused alumina. After cooling and forming, the drive motor starts and the cooling box is deflected backward through gear track transmission, pushing the formed white fused alumina sheet onto the conveyor belt. 2. Crushing: The conveyor belt transports the white fused alumina sheet to the crushing mechanism. The main crushing roller and the auxiliary crushing roller crush the white fused alumina in sequence. The large and small particle crushing protrusions with magnetic structure effectively improve the crushing efficiency and can also achieve preliminary magnetic separation of white fused alumina. The crushed pieces fall into the first material box. 3. Crushing: The white corundum fragments in the first feed hopper are conveyed to the crushing barrel by the first conveyor. Depending on the crushing requirements, it is possible to select whether to activate the first or second electromagnet to release the grinding steel balls. When small-particle crushing is required, the first electromagnet is activated to release small grinding steel balls. After crushing is completed, the crushing barrel is tilted to the left by the adjustment structure, so that the small grinding steel balls return to the electromagnet position and are attracted. When large-particle crushing is required, the second electromagnet is activated to release large grinding steel balls. After crushing is completed, the crushing barrel is tilted to the right by the adjustment structure, so that the large grinding steel balls return to the electromagnet position and are attracted. 4. Multi-stage screening: The pulverized white fused alumina powder is conveyed to the screening box of the grading screening mechanism through the second conveyor. When the powder passes through the feed pipe at the top of the screening box, it is adsorbed by the magnet layer inside the feed pipe in real time for secondary magnetic separation. The multi-stage screens in the screening box control the working state of the screens through the auxiliary motor and adjusting gears, performing horizontal screening or vertical non-screening to achieve multi-stage particle size control screening operation. White fused alumina powder that meets the requirements is separated through different levels of screens, completing precise sorting.

[0015] By adopting the above technical solution, the beneficial effects of the present invention are: A cooling and forming mechanism is adopted. The molten white fused alumina is poured into the mold cavity of the forming box. The mold cavity of the forming box is a thin rectangular plate structure. The cold source inlet and outlet of the cooling box are connected to the cold source. The cold source enters the cooling cavity between the cooling box and the forming box to cool the white fused alumina. Temperature sensors and flow sensors are installed in the cooling cavity. The cooling time and cooling temperature can affect the size and mechanical properties of the white fused alumina crystals. The operator can set different temperatures and flow rates of the cold source according to the operation requirements to control the temperature and cool the white fused alumina in the forming box in real time with precision, so as to ensure that the cooled and formed white fused alumina meets the operation requirements. After the white fused alumina is cooled and shaped, the drive motor drives the gear track at the bottom of the cooling box to rotate, causing the cooling box to deflect backward. The telescopic push rod at the bottom of the forming box drives the push plate at the bottom of the mold cavity to push the shaped white fused alumina onto the conveyor belt in sequence. When the thin-plate white fused alumina moves backward and passes through the protective cover, it is crushed into pieces that meet the crushing requirements by the main crushing roller and the auxiliary crushing roller in sequence and then falls into the first material box. A first electromagnet is located on the left side between the crushing barrel and the wear-resistant layer, and a second electromagnet is located on the right side. Several small grinding steel balls are attracted to the first electromagnet, and several large grinding steel balls are attracted to the second electromagnet. When the fragmented white fused alumina does not require the intervention of the small and large grinding steel balls, the first and second electromagnets do not release the steel balls, allowing the fragmented white fused alumina to crush itself within the crushing barrel. When the fragmented white fused alumina requires the intervention of the small grinding steel balls for assisted crushing, the first electromagnet releases the small grinding steel balls to assist in the grinding of the white fused alumina. After grinding is completed, the crushing barrel is pulled back by a second adjusting structure. The small grinding steel ball deflects to the left, returning to the position of the first electromagnet. After the first electromagnet attracts the small grinding steel ball, the second adjusting structure resets the crushing barrel. When large grinding steel balls are needed to assist in the crushing of white fused alumina fragments, the second electromagnet releases the large grinding steel balls to assist in the crushing of the white fused alumina. After the crushing is completed, the crushing barrel is pulled to the right by the third adjusting structure, and the large grinding steel ball returns to the position of the second electromagnet. After the second electromagnet attracts the large grinding steel ball, the third adjusting structure resets the crushing barrel. Small and large grinding steel balls can also be used simultaneously to assist in the crushing, realizing intelligent crushing operation with multi-level particle size control of white fused alumina. A rotating shaft is provided on one side edge of the screen of the screening box. The rotating shaft is mounted on the screening box and rotates in the front-to-back direction. The rear end of the rotating shaft extends out of the screening box and is equipped with an adjusting gear. Several auxiliary motors corresponding to the adjusting gears are provided on the side of the screening box. The main shaft of the auxiliary motor is equipped with auxiliary gears. The auxiliary gears mesh with the adjusting gears for transmission. The adjusting gears drive the rotating shaft to rotate and adjust the screen to be in a horizontal screening state or a vertical non-screening state. By adjusting the working state of the screen through the auxiliary motors, multi-stage particle size control screening operation can be achieved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the molding box in this invention; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 This is a schematic diagram of the structure of the crushing mechanism without the protective cover in this invention; Figure 6 This is a schematic diagram of the crushing mechanism of the present invention; Figure 7 for Figure 6 A cross-sectional view of the grinding chamber; Figure 8 This is a schematic diagram of the grading and screening mechanism in this invention; Figure 9 for Figure 8 A cross-sectional structural diagram.

[0017] 1. Base, 2. Mounting frame, 3. Cooling box, 4. Molding box, 5. Cold source inlet, 6. Cold source outlet, 7. Mold cavity, 8. Conveyor belt, 9. Protective cover, 10. Main crushing roller, 11. Secondary crushing roller, 12. First motor, 13. First material box, 14. First conveyor, 15. Crushing bucket, 16. Mounting plate, 17. Spring support leg, 18. Vibrating motor, 19. Second material box, 20. Second conveyor, 21. Screening box, 22. Feed pipe, 23. Magnetic adsorption layer, 24. Gear track, 25. Drive motor, 26. Push plate, 27. Telescopic push rod, 28. First electromagnet, 29. Second electromagnet, 30. Adjusting motor, 31. Pull rope, 32. Screen, 33. Rotating shaft, 34. Adjusting gear, 35. Auxiliary motor, 36. Waste collection port. Detailed Implementation

[0018] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] 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.

[0020] like Figures 1-9 As shown, the intelligent granulation equipment for white corundum based on multi-stage particle size control includes a base 1. From front to back, a cooling and forming mechanism, a crushing mechanism, a pulverizing mechanism, and a grading and screening mechanism are sequentially arranged on the base 1. The cooling and forming mechanism includes a mounting frame 2 and a cooling box 3. The cooling box 3 is rotatably mounted on the mounting frame 2. A forming box 4 is located inside the cooling box 3. The top of the forming box 4 extends out of the cooling box 3. A cooling cavity is provided between the cooling box 3 and the forming box 4. The cooling box 3 has a cold source inlet 5 and a cold source outlet 6. The forming box 4 has an open-top mold cavity 7. A guide channel is provided on the forming box 4, and the guide channel communicates with the mold cavity 7.

[0021] The crushing mechanism includes a conveyor belt 8, a protective cover 9 on the conveyor belt 8, a main crushing roller 10 and an auxiliary crushing roller 11 arranged from front to back inside the protective cover 9, a first motor 12 arranged on the side of the protective cover 9, the main shaft of the first motor 12 being fixedly connected to the main shaft of the main crushing roller 10, and the main crushing roller 10 driving the auxiliary crushing roller 11 to rotate through a transmission belt; a first material box 13 is arranged on the rear side of the conveyor belt 8, and a first conveyor 14 is arranged on the first material box 13; The crushing mechanism includes a crushing barrel 15, with mounting plates 16 on the left and right sides of the crushing barrel 15, and spring support legs 17 on the mounting plates 16. A vibration motor 18 is provided at the bottom of the crushing barrel 15. The crushing barrel 15 has a feed inlet and a discharge outlet. The feed inlet is connected to the first conveyor 14. A second material box 19 is provided at the rear of the crushing barrel 15, and a second conveyor 20 is provided on the second material box 19. The grading and screening mechanism includes a screening box 21. A detachable feed pipe 22 is provided at the top of the screening box 21. The feed pipe 22 is connected to the second conveyor 20. A magnetic adsorption layer 23 is provided inside the feed pipe 22.

[0022] The bottom of the cooling box 3 is provided with an arc-shaped gear track 24, and the base 1 at the bottom of the cooling box 3 is provided with a drive motor 25. The main shaft of the drive motor 25 is provided with a drive gear, and the drive gear meshes with the gear track 24 for transmission.

[0023] The bottom of the mold cavity 7 of the molding box 4 is provided with a push plate 26, and the bottom of the molding box 4 is provided with a telescopic push rod 27, the telescopic end of the telescopic push rod 27 being connected to the bottom of the push plate 26.

[0024] The main crushing roller 10 is provided with large particle crushing protrusions, and the auxiliary crushing roller 11 is provided with small particle crushing protrusions. Both the large particle crushing protrusions and the small particle crushing protrusions are magnetic crushing protrusions.

[0025] The inner cavity of the crushing barrel 15 is provided with a wear-resistant layer. A first electromagnet 28 is provided on the left side between the crushing barrel 15 and the wear-resistant layer, and a second electromagnet 29 is provided on the right side between the crushing barrel 15 and the wear-resistant layer. Several small grinding steel balls are adsorbed on the first electromagnet 28, and several large grinding steel balls are adsorbed on the second electromagnet 29. After both the small and large grinding steel balls are released to participate in the crushing operation, the steps for their separate real-time recovery are as follows: The second adjusting structure pulls the crushing barrel 15 to the left, causing both the small and large grinding steel balls to return to the position of the first electromagnet 28. The magnetic attraction force of the first electromagnet 28 is adjusted so that it can only attract the small grinding steel balls. After the second adjusting structure resets the crushing barrel 15, the large grinding steel balls return to the bottom of the crushing barrel 15. At this time, the magnetic attraction force of the first electromagnet 28 returns to the strong attraction mode, causing the small grinding steel balls to be tightly attracted to the first electromagnet 28. The third adjusting structure pulls the crushing barrel 15 to the right, causing the large grinding steel balls to return to the position of the second electromagnet 29. After the second electromagnet 29 attracts the large grinding steel balls, the third adjusting structure resets the crushing barrel 15, thus achieving the separate recovery operation of the small and large grinding steel balls.

[0026] The bottom of the crushing barrel 15 is equipped with a first adjustment structure, a second adjustment structure, and a third adjustment structure. These three adjustment structures have identical external shapes. The first adjustment structure includes an adjustment motor 30, with a pull rope 31 mounted on its main shaft. The first adjustment structure is connected to the rear bottom of the crushing barrel 15. The second adjustment structure is connected to the middle position of the mounting plate 16 on the left side of the crushing barrel 15, and the third adjustment structure is connected to the middle position of the mounting plate 16 on the right side of the crushing barrel 15. The first adjustment structure is used to tilt the rear end of the crushing barrel 15 downwards, facilitating the discharge of white corundum. The pull ropes 31 of all three adjustment structures are in a slack state when the crushing barrel 15 is vibrating and crushing.

[0027] The inlet and outlet of the crushing barrel 15 are both equipped with electric valves.

[0028] The screening box 21 is a multi-stage screening box. The screening box 21 is provided with multiple screens 32 from top to bottom. A rotating shaft 33 is provided on one side edge of each screen 32. The rotating shaft 33 is rotatably mounted on the screening box 21 in the front-back direction. The rear end of the rotating shaft 33 extends out of the screening box 21 and is provided with an adjusting gear 34. Several auxiliary motors 35 corresponding to the adjusting gear 34 are provided on the side of the screening box 21. The main shaft of the auxiliary motor 35 is provided with an auxiliary gear. The auxiliary gear meshes with the adjusting gear 34 for transmission. The adjusting gear 34 drives the rotating shaft 33 to rotate and adjust the screen 32 to be in a horizontal screening state or a vertical non-screening state.

[0029] The bottom of the screening box 21 is provided with a waste collection port 36.

[0030] The precise sorting method of white fused alumina intelligent granulation equipment based on multi-stage particle size control includes the following steps: 1. Cooling and forming: The molten white fused alumina is poured into the mold cavity 7 of the forming box 4. The mold cavity 7 is designed as a thin rectangular plate structure to facilitate rapid and uniform cooling. The external cold source equipment is connected through the cold source inlet 5 and cold source outlet 6 of the cooling box 3. The cold source enters the cooling cavity between the cooling box 3 and the forming box 4 to precisely control the temperature of the white fused alumina. During the cooling process, the temperature sensor and flow sensor monitor and provide feedback data in real time. The operator can adjust the temperature and flow rate of the cold source as needed to control the crystal size and mechanical properties of the white fused alumina. After cooling and forming, the drive motor 25 is started, and the cooling box 3 is deflected backward through the gear track 24 to push the formed white fused alumina sheet onto the conveyor belt 8. 2. Crushing: The conveyor belt 8 transports the white fused alumina sheet to the crushing mechanism. The main crushing roller 10 and the auxiliary crushing roller 11 crush the white fused alumina in sequence. The large and small particle crushing protrusions with magnetic structure effectively improve the crushing efficiency and can also achieve preliminary magnetic separation of white fused alumina. The crushed pieces fall into the first material box 13. 3. Crushing: The white corundum fragments in the first feed hopper 13 are conveyed to the crushing barrel 15 by the first conveyor 14. Depending on the crushing requirements, it is possible to select whether to activate the first electromagnet 28 or the second electromagnet 29 to release the grinding steel balls. When small-particle crushing is required, the first electromagnet 28 is activated to release small grinding steel balls. After crushing, the crushing barrel 15 is deflected to the left by the adjustment structure, so that the small grinding steel balls return to the electromagnet position and are attracted. When large-particle crushing is required, the second electromagnet 29 is activated to release large grinding steel balls. After crushing, the crushing barrel 15 is deflected to the right by the adjustment structure, so that the large grinding steel balls return to the electromagnet position and are attracted. 4. Multi-stage screening: The pulverized white corundum powder is conveyed to the screening box 21 of the grading screening mechanism through the second conveyor 20. When the powder passes through the feed pipe 22 at the top of the screening box 21, it is subjected to real-time secondary magnetic separation by the magnetic adsorption layer 23 inside the feed pipe 22. The multi-stage screens 32 in the screening box 21 are controlled by the auxiliary motor 35 and the adjusting gear 34 to control the working state of the screens 32, either horizontally or vertically without screening, to achieve multi-stage particle size control screening operation. The white corundum powder that meets the requirements is separated through the different levels of screens 32, completing the precise sorting.

[0031] Workers can use a controller or remote control to control the various electrical components in this invention to perform various actions. The controller used in this invention is also called a programmable logic controller (PLC), which is a digital computing and operating electronic system specifically designed for industrial applications. It uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting, and arithmetic operations. It controls various types of mechanical equipment or production processes through digital or analog inputs and outputs. This is a conventional technology, and its structural features will not be described in detail.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart granulation equipment for white fused alumina based on multi-stage particle size control, characterized in that: The device includes a base, on which a cooling and forming mechanism, a crushing mechanism, a pulverizing mechanism, and a grading and screening mechanism are arranged sequentially from front to back. The cooling and forming mechanism includes a mounting frame and a cooling box. The cooling box is rotatably mounted on the mounting frame. A forming box is located inside the cooling box. The top of the forming box extends out of the cooling box. A cooling cavity is provided between the cooling box and the forming box. The cooling box is provided with a cold source inlet and a cold source outlet. The forming box has a mold cavity with an open top. The crushing mechanism includes a conveyor belt with a protective cover. Inside the protective cover, from front to back, there are a main crushing roller and a secondary crushing roller. A first motor is located on the side of the protective cover. The main shaft of the first motor is fixedly connected to the main shaft of the main crushing roller. The main crushing roller drives the secondary crushing roller to rotate through a transmission belt. A first material box is located at the rear of the conveyor belt, and a first conveyor is located on the first material box. The crushing mechanism includes a crushing barrel, with mounting plates on the left and right sides, spring-loaded support legs on the mounting plates, a vibrating motor at the bottom of the crushing barrel, a feed inlet and a discharge outlet, the feed inlet being connected to a first conveyor, a second material box at the rear of the crushing barrel, and a second conveyor on the second material box; the grading and screening mechanism includes a screening box, with a detachable feed pipe at the top of the screening box, the feed pipe being connected to the second conveyor, and a magnetic adsorption layer inside the feed pipe.

2. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 1, characterized in that: The bottom of the cooling box is provided with an arc-shaped gear track, and a drive motor is provided on the base at the bottom of the cooling box. The main shaft of the drive motor is provided with a drive gear, which meshes with the gear track for transmission.

3. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 2, characterized in that: The bottom of the molding box cavity is provided with a push plate, and the bottom of the molding box is provided with a telescopic push rod, the telescopic end of which is connected to the bottom of the push plate.

4. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 3, characterized in that: The main crushing roller is provided with large particle crushing protrusions, and the auxiliary crushing roller is provided with small particle crushing protrusions. Both the large particle crushing protrusions and the small particle crushing protrusions are magnetic crushing protrusions.

5. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 4, characterized in that: The inner cavity of the crushing barrel is provided with a wear-resistant layer. A first electromagnet is provided on the left side between the crushing barrel and the wear-resistant layer, and a second electromagnet is provided on the right side between the crushing barrel and the wear-resistant layer. Several small grinding steel balls are attracted to the first electromagnet, and several large grinding steel balls are attracted to the second electromagnet.

6. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 5, characterized in that: The bottom of the crushing barrel is provided with a first adjustment structure, a second adjustment structure and a third adjustment structure. The first adjustment structure, the second adjustment structure and the third adjustment structure have the same external structure. The first adjustment structure includes an adjustment motor. A pull rope is provided on the main shaft of the adjustment motor. The first adjustment structure is connected to the bottom rear side of the crushing barrel. The second adjustment structure is connected to the middle position of the mounting plate on the left side of the crushing barrel. The third adjustment structure is connected to the middle position of the mounting plate on the right side of the crushing barrel.

7. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 6, characterized in that: Both the inlet and outlet of the crushing barrel are equipped with electric valves.

8. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 7, characterized in that: The screening box is a multi-stage screening box with multiple screens arranged from top to bottom. A rotating shaft is provided on one side edge of each screen, and the rotating shaft is rotatably mounted on the screening box in the front-back direction. The rear end of the rotating shaft extends out of the screening box and is provided with an adjusting gear. Several auxiliary motors corresponding to the adjusting gears are provided on the side of the screening box. The main shaft of the auxiliary motor is provided with auxiliary gears, which mesh with the adjusting gears for transmission. The adjusting gears drive the rotating shaft to rotate and adjust the screens to be in a horizontal screening state or a vertical non-screening state.

9. The intelligent granulation equipment for white fused alumina based on multi-stage particle size control according to claim 8, characterized in that: The bottom of the screening box is equipped with a waste collection port.

10. The precise sorting method of the intelligent white fused alumina granulation equipment based on multi-stage particle size control according to claim 1, characterized in that: Includes the following steps:

1. Cooling and Forming: The molten white fused alumina is poured into the mold cavity of the forming box. The mold cavity is designed as a thin rectangular plate structure to facilitate rapid and uniform cooling. The cooling box is connected to an external cold source device through its cold source inlet and outlet. The cold source enters the cooling chamber between the cooling box and the forming box to precisely control the temperature of the white fused alumina. During the cooling process, temperature and flow sensors monitor and provide feedback data in real time. Operators can adjust the temperature and flow rate of the cold source as needed to control the crystal size and mechanical properties of the white fused alumina. After cooling and forming, the drive motor starts and the cooling box is deflected backward through gear track transmission, pushing the formed white fused alumina sheet onto the conveyor belt.

2. Crushing: The conveyor belt transports the white fused alumina sheet to the crushing mechanism. The main crushing roller and the auxiliary crushing roller crush the white fused alumina in sequence. The large and small particle crushing protrusions with magnetic structure effectively improve the crushing efficiency and can also achieve preliminary magnetic separation of white fused alumina. The crushed pieces fall into the first material box.

3. Crushing: The white corundum fragments in the first feed hopper are conveyed to the crushing barrel by the first conveyor. Depending on the crushing requirements, it is possible to select whether to activate the first or second electromagnet to release the grinding steel balls. When small-particle crushing is required, the first electromagnet is activated to release small grinding steel balls. After crushing is completed, the crushing barrel is tilted to the left by the adjustment structure, so that the small grinding steel balls return to the electromagnet position and are attracted. When large-particle crushing is required, the second electromagnet is activated to release large grinding steel balls. After crushing is completed, the crushing barrel is tilted to the right by the adjustment structure, so that the large grinding steel balls return to the electromagnet position and are attracted.

4. Multi-stage screening: The pulverized white fused alumina powder is conveyed to the screening box of the grading screening mechanism through the second conveyor. When the powder passes through the feed pipe at the top of the screening box, it is adsorbed by the magnet layer inside the feed pipe in real time for secondary magnetic separation. The multi-stage screens in the screening box control the working state of the screens through the auxiliary motor and adjusting gears, performing horizontal screening or vertical non-screening to achieve multi-stage particle size control screening operation. White fused alumina powder that meets the requirements is separated through different levels of screens, completing precise sorting.

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