Fine grinding system based on high-fines content wet material

Abstract

The application discloses a fine grinding system based on high-fine-powder-content wet material, which comprises a fine grinding process system of wet material, wherein a feeding device, a sorting device, a heating device, a grinding device and a dust collecting device are arranged in the fine grinding process system of wet material; the feeding device comprises a vibrating feeder and a wind-locking feeder, an air outlet of the vibrating feeder is communicated with an air inlet of the wind-locking feeder, the sorting device comprises a beating and sorting machine and a cyclone drum, an air inlet of the beating and sorting machine is communicated with an air outlet of the wind-locking feeder, and a fine material outlet of the beating and sorting machine is connected with an air inlet of the cyclone drum. The fine grinding system based on high-fine-powder-content wet material can dry, beat and sort the high-fine-powder-content wet material through the beating and sorting machine, so that the fine particle content of the material entering the vertical mill is reduced, the running stability of the vertical mill is improved, and the high-speed rotating blade in the beating and sorting machine can beat and separate the agglomerates after being ground by the vertical mill, so that the sorting efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of ore processing technology, specifically to a fine grinding system based on wet materials with high fine powder content. Background Technology

[0002] With the continuous development of industrial technology, the market demand for finer particles of inorganic non-metallic minerals is constantly increasing. Some non-metallic minerals need to undergo multiple grinding processes in industrial production to achieve efficient utilization. A typical non-metallic mineral is lithium slag, which is an industrial waste generated during the production of lithium salts. Because lithium slag contains active oxides such as SiO2 and Al2O3, it can be used as an auxiliary cementing material after mechanical grinding. However, the high content of fine powder in lithium slag powder leads to severe vibration of the grinding equipment due to the instability of the material layer, reducing grinding efficiency. There are many non-metallic minerals similar to lithium slag, such as spodumene concentrate. During the grinding process, the accumulation of a large amount of charge on the particle surface and van der Waals forces between fine particles cause agglomeration of fine particles, reducing the classification efficiency of the air classifier. Therefore, it is necessary to deagglomerate the particles.

[0003] However, traditional methods for grinding wet materials with high fine powder content have the following drawbacks:

[0004] 1. High fine powder content in the material causes instability in the material layer, leading to vibration in the grinding equipment and reducing grinding efficiency;

[0005] 2. Both the dried and ground materials entering the sorting equipment exhibit agglomeration, which reduces the sorting efficiency of the equipment. Traditional deagglomeration methods include coupling agents, surfactants, and polymerizing agents. However, these methods not only increase production costs but may also affect the basic properties of the materials. Summary of the Invention

[0006] The purpose of this invention is to provide a fine grinding system based on wet materials with high fine powder content, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fine grinding system based on wet materials with high fine powder content, comprising a wet material fine grinding process system, wherein the wet material fine grinding process system is equipped with a feeding device, a sorting device, a heating device, a grinding device, and a dust collection device. The feeding device includes a vibrating feeder and a lock-air feeder, the air outlet of the vibrating feeder being connected to the air inlet of the lock-air feeder. The sorting system includes a dispersing classifier and a cyclone separator, the air inlet of the dispersing classifier being connected to the air outlet of the lock-air feeder, and the fine material outlet of the dispersing classifier being connected to the air inlet of the cyclone separator. The heating device includes a hot air furnace and a first fan, the air outlet of the first fan being connected to the air inlet of the hot air furnace, and the air outlet of the hot air furnace being connected to the air outlet of the first fan being connected to the air inlet of the first fan ... The air outlets of the air inlet and the cyclone separator are both connected to the air inlet of the dispersing and classifying mill. The grinding device includes a vertical mill and a ball mill. A first bucket elevator is provided on one side of the vertical mill. The air inlet of the vertical mill is connected to the dispersing and classifying mill through the first bucket elevator. The air inlet of the ball mill is connected to the air outlet of the cyclone separator. The dust collection device includes a bag filter, a second fan, and an exhaust tower. The air inlet of the bag filter is connected to the air outlet of the ball mill. The air outlet of the bag filter is connected to the air inlet of the second fan. The air outlet of the second fan is connected to one side of the exhaust tower. A screw conveyor is provided at the bottom of the bag filter. A second bucket elevator is provided on one side of the screw conveyor. A finished product silo is provided on one side of the second bucket elevator.

[0008] Preferably, the powder separator includes a sorting component, a dispersing component, and a discharge component. The bottom end of the sorting component is fixedly connected to the top end of the dispersing component, and the bottom end of the dispersing component is fixedly connected to the top end of the discharge component.

[0009] Preferably, the sorting component includes a first motor and a first bearing. A sorting housing is provided on one side of the first motor. A feed shaft is installed inside the sorting housing. First pulleys are fixedly installed on the output end of the first motor and the surface of the feed shaft. A first belt is connected between the two first pulleys. A first bearing seat is provided in the middle of the feed shaft. The interior of the first bearing seat is connected to the bottom end of the first bearing. The feed shaft is connected to the first bearing. A plurality of moving blades are installed on the surface of the feed shaft. A plurality of stationary blades located on one side of the moving blades are installed on the feed shaft. A fine material outlet is opened on one side of the sorting housing. The gas-solid mixture enters the moving blades and stationary blades. Fine particles smaller than 80μm are discharged from the fine material outlet through the moving blades. Coarse particles larger than 80μm fall into the dispersing component.

[0010] Preferably, the dispersing assembly includes a dispersing housing and four fixed plates. The dispersing housing has a dispersing cavity inside. The two ends of the inner wall of the dispersing cavity are respectively fixedly connected to one end of the four fixed plates. A second bearing seat is installed between every two fixed plates. A second bearing is installed inside each of the two second bearing seats. A shaft passing through the two second bearings is installed inside the dispersing housing. A second motor is provided on one side of the dispersing housing. A second pulley is fixedly installed on the output end of the second motor and the surface of the shaft. A second belt is connected between the two second pulleys. When the second motor is powered on, it starts and drives the second pulley connected to it to rotate. The second pulley drives the adjacent second pulley to rotate through the second belt. The second pulley drives the shaft to rotate.

[0011] Preferably, a plurality of expansion sleeves are installed in the middle of the shaft. A portion of the expansion sleeves has arc-shaped blades fixedly installed on both sides, and the remaining portion of the expansion sleeves has rectangular blades fixedly installed on both sides. The arc-shaped blades and the rectangular blades form a dispersed blade structure, and the length of the arc-shaped blades is 0.7-0.9 times that of the rectangular blades.

[0012] Preferably, the discharge assembly includes a discharge truncated cone and three hot air inlet pipes. The bottom end of the discharge truncated cone is fixedly connected to the top end of the three hot air inlet pipes, and the three hot air inlet pipes are arranged in a triangle. A shaft outlet is opened in the middle of the bottom end of the discharge truncated cone, and a coarse air outlet is opened on one side of the bottom end of the discharge truncated cone. The dispersing and classifying machine is driven externally. Materials that cannot be dispersed are sent to the vertical mill for grinding through the coarse air outlet.

[0013] Preferably, the bottom ends of the three hot air inlet pipes are fixedly connected to the air outlet of the hot air furnace. After secondary grinding in a ball mill, the material enters the finished product silo via a screw conveyor and a second bucket elevator. The specific surface area of ​​the finished material is 600 m². 2 / kg-700m 2 / kg, the material separated by the dispersing and classifying machine is collected by a cyclone separator. The specific surface area of ​​the material collected by the cyclone separator is 300m². 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot air furnace is blown into the powder classifier by the first blower. The temperature of the hot air furnace outlet is 300-400℃. In order to improve the utilization rate of hot air, the secondary hot air generated by the cyclone is connected to the hot air furnace outlet through the pipeline.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Compared with existing related technologies, the present invention exhibits many significant beneficial effects.

[0016] Firstly, this invention specifically incorporates a key piece of equipment: a dispersing and classifying machine. This machine plays a crucial role in several aspects when dealing with wet materials with a high fine powder content. On one hand, it enables efficient drying of such wet materials. Through a specific heating mechanism and a well-designed internal airflow circulation system, the moisture in the wet material evaporates rapidly, significantly reducing its humidity and creating more favorable conditions for subsequent processing.

[0017] On the other hand, the dispersing and classifying machine also has excellent dispersing capabilities. For materials that may agglomerate due to various reasons, it uses internal high-speed rotating blades and other components to effectively disperse the originally clustered material particles through powerful impact and agitation. This allows the material to be processed in a more uniform and dispersed state, avoiding problems such as uneven or insufficient processing that may be caused by agglomeration.

[0018] In addition, this dispersing and classifying machine also undertakes the important task of powder classification. It can accurately screen and separate materials based on the size, density and other characteristics of the material particles, screening out fine particles that meet specific requirements, while processing coarse particles that do not meet the requirements accordingly.

[0019] Meanwhile, in the dispersing classifier of this invention, after the grinding operation is completed in the vertical mill, the material often re-forms agglomerates due to various factors. At this time, the high-speed rotating blades in the dispersing classifier, with their powerful drive and ingenious design, can further disperse and separate these agglomerates. In this way, agglomerates that might otherwise affect subsequent classifying efficiency and product quality are dealt with promptly and effectively, making the entire classifying process smoother and more efficient, ultimately effectively improving classifying efficiency. Attached Figure Description

[0020] Figure 1 This is a simplified diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the appearance of the powder dispersing and classifying machine of the present invention;

[0022] Figure 3 This is a cross-sectional view of the sorting component of the powder separator of the present invention;

[0023] Figure 4 This is a cross-sectional view of the dispersing component of the powder classifier of the present invention;

[0024] Figure 5 This is a top view of the discharge frustum assembly of the powder classifier of the present invention.

[0025] In the diagram: 1. Vibrating feeder; 2. Airlock feeder; 3. Dispersing and classifying mill; 31. Sorting assembly; 311. First motor; 312. First belt; 313. Feed shaft; 314. First bearing housing; 315. First bearing; 316. Moving blade; 317. Stationary blade; 318. Fine material outlet; 319. Sorting machine casing; 32. Dispersing assembly; 321. Dispersing chamber; 322. Fixed plate; 323. Second bearing housing; 324. Second bearing; 325. Shaft; 326. Second motor 327. Second belt; 328. Expansion sleeve; 329. Arc blade; 330. Rectangular blade; 33. Discharge assembly; 331. Discharge truncated cone; 332. Hot air inlet pipe; 333. Shaft outlet; 334. Coarse material outlet; 4. Cyclone separator; 5. Hot air furnace; 6. First fan; 7. Vertical mill; 8. Ball mill; 9. First bucket elevator; 10. Bag dust collector; 11. Second fan; 12. Discharge tower; 13. Screw conveyor; 14. Second bucket elevator; 15. Finished product silo. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Please see Figure 1-5 This invention provides a fine grinding system for wet materials with high fine powder content, including a wet material fine grinding process system. The wet material fine grinding process system includes a feeding device, a sorting device, a heating device, a grinding device, and a dust collection device. The feeding device includes a vibrating feeder 1 and a lock-air feeder 2, with the outlet of the vibrating feeder 1 connected to the inlet of the lock-air feeder 2. The sorting system includes a dispersing separator 3 and a cyclone separator 4, with the inlet of the dispersing separator 3 connected to the outlet of the lock-air feeder 2, and the fine material outlet of the dispersing separator 3 connected to the inlet of the cyclone separator 4. The heating device includes a hot air furnace 5 and a first blower 6, with the outlet of the first blower 6 connected to the inlet of the hot air furnace 5. Both the outlet of the hot air furnace 5 and the outlet of the cyclone separator 4 are connected to the dispersing separator. The air inlet of machine 3 is connected to the grinding device, which includes a vertical mill 7 and a ball mill 8. A first bucket elevator 9 is provided on one side of the vertical mill 7. The air inlet of the vertical mill 7 is connected to the dispersing and classifying machine 3 through the first bucket elevator 9. The air inlet of the ball mill 8 is connected to the air outlet of the cyclone 4. The dust collection device includes a bag dust collector 10, a second fan 11, and an exhaust tower 12. The air inlet of the bag dust collector 10 is connected to the air outlet of the ball mill 8. The air outlet of the bag dust collector 10 is connected to the air inlet of the second fan 11. The air outlet of the second fan 11 is connected to one side of the exhaust tower 12. A screw conveyor 13 is provided at the bottom of the bag dust collector 10. A second bucket elevator 14 is provided on one side of the screw conveyor 13. A finished product silo 15 is provided on one side of the second bucket elevator 14.

[0028] The powder separator 3 includes a sorting component 31, a dispersing component 32, and a discharge component 33. The bottom end of the sorting component 31 is fixedly connected to the top end of the dispersing component 32, and the bottom end of the dispersing component 32 is fixedly connected to the top end of the discharge component 33.

[0029] The sorting assembly 31 includes a first motor 311 and a first bearing 315. A sorting housing 319 is provided on one side of the first motor 311. A feed shaft 313 is installed inside the sorting housing 319. First pulleys are fixedly installed on the output end of the first motor 311 and the surface of the feed shaft 313. A first belt 312 is connected between the two first pulleys. A first bearing seat 314 is provided in the middle of the feed shaft 313. The interior of the first bearing seat 314 is connected to the bottom end of the first bearing 315. Next, the feed shaft 313 is connected to the first bearing 315. Several moving blades 316 are installed on the surface of the feed shaft 313. Several stationary blades 317 located on one side of the moving blades 316 are installed on the feed shaft 313. A fine material outlet 318 is opened on one side of the sorting machine housing 319. The gas-solid mixed flow enters the moving blades 316 and the stationary blades 317. Fine particles smaller than 80μm are discharged through the moving blades 316 and the fine material outlet 318. Coarse particles larger than 80μm fall into the dispersing component 32.

[0030] The dispersing assembly 32 includes a dispersing housing and four fixed plates 322. The dispersing housing has a dispersing cavity 321 inside. The two ends of the inner wall of the dispersing cavity 321 are fixedly connected to one end of the four fixed plates 322 respectively. A second bearing seat 323 is installed between every two opposing fixed plates 322. A second bearing 324 is installed inside each of the two second bearing seats 323. A shaft 325 passing through the two second bearings 324 is installed inside the dispersing housing. A second motor 326 is provided on one side of the dispersing housing. A second pulley is fixedly installed at the output end of the second motor 326 and on the surface of the shaft 325. A second belt 327 is connected between the two second pulleys. When the second motor 326 is powered on, it starts and drives the second pulley connected to it to rotate. The second pulley drives the adjacent second pulley to rotate through the second belt 327. The second pulley drives the shaft 325 to rotate.

[0031] Several expansion sleeves 328 are installed in the middle of the shaft 325. A portion of the expansion sleeves 328 have arc-shaped blades 329 fixedly installed on both sides, while the remaining expansion sleeves 328 have rectangular blades 330 fixedly installed on both sides. The blade shape of the disintegrating component can be divided into two types: arc-shaped blades 329 and rectangular blades 330. The length of the arc-shaped blades 329 is 0.7-0.9 times that of the rectangular blades 330.

[0032] The discharge assembly 33 includes a discharge truncated cone 331 and three hot air inlet pipes 332. The bottom end of the discharge truncated cone 331 is fixedly connected to the top end of the three hot air inlet pipes 332, and the three hot air inlet pipes 332 are arranged in a triangle. A shaft outlet 333 is opened in the middle of the bottom end of the discharge truncated cone 331, and a coarse air outlet 334 is opened on one side of the bottom end of the discharge truncated cone 331. The dispersing and classifying mill 3 adopts an external drive. The material that cannot be dispersed is sent to the vertical mill 7 for grinding through the coarse air outlet 334.

[0033] The bottom ends of the three hot air inlet pipes 332 are all fixedly connected to the air outlet of the hot air furnace 5. After secondary grinding by the ball mill 8, the material enters the finished product silo 15 via the screw conveyor 13 and the second bucket elevator 14. The specific surface area of ​​the finished material is 600 m². 2 / kg-700m 2 / kg, the material separated by the dispersing and classifying mill 3 is collected by the cyclone separator 4. The specific surface area of ​​the material collected by the cyclone separator 4 is 300m². 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot air furnace 5 is blown into the powder classifier 3 by the first blower 6. The outlet temperature of the hot air furnace 5 is 300-400℃. In order to improve the utilization rate of hot air, the secondary hot air generated by the cyclone 4 is connected to the outlet of the hot air furnace 5 through a pipeline.

[0034] The vibrating feeder 1 plays a crucial initial role in the entire process. Materials like spodumene concentrate, especially when the fine powder content is as high as nearly 80%, exhibit complex physical properties. Large pieces of wet material need to be processed by the vibrating feeder 1 before entering subsequent processing stages. Utilizing its unique vibration principle, the vibrating feeder 1 skillfully disperses large pieces of wet material into smaller, looser pieces through continuous and regular vibration. This process is not a simple physical separation but has significant implications.

[0035] On the one hand, due to the high fine powder content of spodumene concentrate, if it is not uniformly dispersed, subsequent equipment may face many problems during processing. For example, uneven feeding may lead to material accumulation in some areas while other areas are short of material, thus affecting the overall processing efficiency and effect. Through the uniform dispersion effect of the vibrating feeder 1, the wet material with high fine powder content can enter the airlock feeder 2 in a relatively uniform state. This uniformity lays a good foundation for each subsequent processing step, ensuring that each particle of material can be processed under suitable conditions.

[0036] On the other hand, the vibration frequency and amplitude parameters of the vibrating feeder 1 are carefully designed and adjusted. Appropriate vibration parameters can achieve optimal dispersion without damaging the original physicochemical properties of the material. This is crucial for maintaining the quality of spodumene concentrate and ensuring the feasibility of subsequent processing.

[0037] Next, the material enters the airlock feeder 2. The airlock feeder 2 plays a crucial role in the entire material handling system: preventing the high-speed hot air from escaping from the dispersing and classifying mill 3. During material handling, the effective utilization and control of hot air is a key factor affecting processing efficiency and quality. When performing rapid drying and dispersing operations on the material, the dispersing and classifying mill 3 needs to maintain stable internal hot air circulation and specific temperature and airflow conditions. If hot air escapes unchecked, it will not only waste energy but also disrupt the carefully crafted processing environment inside the dispersing and classifying mill 3, preventing the material from achieving the expected drying and dispersing effects.

[0038] Through its precise structural design and working principle, the airlock feeder 2 effectively seals off the hot air, ensuring that the hot air inside the powder separator 3 circulates in a relatively closed and stable environment. Simultaneously, it ensures that the material is smoothly and orderly conveyed from itself to the powder separator 3, achieving a good connection between the material and the hot air environment.

[0039] Once the material enters the dispersing and classifying mill 3, it undergoes a series of crucial processing steps. The dispersing and classifying mill 3 can be considered one of the core pieces of equipment in the entire material handling process. It has multiple functions and can quickly dry and disperse the material, thereby achieving the initial transformation of the material's physical state.

[0040] Inside the dispersing and classifying mill 3, the material is first impacted by high-speed hot air. Because its internal temperature is set within a specific range of 150-250℃, it has a significant impact on the spodumene concentrate entering the mill, especially the wet fine particles. Some of the wet fine particles are rapidly heated upon contact with the high-speed hot airflow. This rapid heating process causes the moisture inside the wet fine particles to evaporate quickly, thus achieving a preliminary drying effect.

[0041] Simultaneously, with the flow of hot air and the action of the rotating components inside the dispersing and classifying mill 3, the material undergoes a further dispersing process. After entering the dispersing and classifying mill 3 through the feed shaft 313, the material interacts with the high-speed rotating moving blades 316. Driven by the high-speed rotation of the moving blades 316, the material is continuously thrown and impacted, and some larger particles or particles that may have been agglomerated begin to be gradually dispersed.

[0042] Furthermore, the fine particle agglomerates are further dispersed by the curved blades 329 and rectangular blades 330 during this process. The shape, angle, and arrangement of the curved blades 329 and rectangular blades 330 have been repeatedly tested and optimized. The rectangular blades 330, with their relatively regular shape and specific angle, can effectively disperse the agglomerates initially, breaking down larger agglomerates into relatively smaller particle clusters. The curved blades 329, building upon this, utilize their curved structure to further disperse the particles treated by the rectangular blades 330, ensuring that the agglomerates are completely dispersed into individual fine particles.

[0043] After this series of dispersing and drying operations, the dispersed agglomerated wet particles will be dried again and then discharged with the airflow. At this point, the material has achieved a relatively ideal physical state transformation within the dispersing and classifying mill 3, preparing it for further processing.

[0044] During the material processing of the dispersing and classifying mill 3, a discharge platform 331 is provided at its bottom to ensure that coarse particles are completely discharged. The design of the discharge platform 331 takes into account the physical characteristics and motion patterns of coarse particles. Although some of the coarse particles may have been dispersed after the previous processing, some relatively large particles may still remain. These particles will gradually gather towards the bottom under the action of gravity.

[0045] Three vertical hot air inlet pipes 332 are distributed on the bottom surface of the discharge disc 331, and the hot air inlet pipes 332 are connected to the air outlet of the hot air furnace 5 through pipes. This design allows coarse particles to be continuously impacted by hot air from the hot air furnace 5 when they accumulate near the discharge disc 331. On the one hand, the impact of the hot air can further dry the coarse particles, ensuring that their moisture content meets the requirements of subsequent processing; on the other hand, the pushing effect of the hot air also helps the coarse particles to be discharged from the discharge disc 331 more smoothly, avoiding problems such as blockage inside the equipment.

[0046] Meanwhile, to prevent materials from affecting the equipment's transmission, the dispersing component 32 uses an external transmission design. This external transmission design isolates the equipment's transmission components from the material handling area, effectively preventing wear, corrosion, and other adverse effects on the transmission components during processing. This ensures the stability and reliability of the equipment's transmission and extends its service life.

[0047] A shaft outlet 333 is provided at the center of the discharge platform 331, allowing one end of the shaft 325 to extend out for transmission. This design satisfies the transmission requirements of the equipment without affecting the normal discharge of materials at the discharge platform 331 due to the presence of the shaft, thus achieving a harmonious coexistence of transmission and material discharge.

[0048] After being processed by the dispersing and classifying mill 3, the material is separated according to particle size. Coarse particles enter the vertical mill 7 for grinding due to gravity. The vertical mill 7 is a device specifically designed for the efficient grinding of coarse particles. When coarse particles enter the vertical mill 7, they undergo a continuous grinding process under the action of its internal grinding components.

[0049] The grinding principle of the vertical mill 7 is based on strong pressure and friction. During the grinding process, coarse particles are tightly squeezed between the grinding components. Through continuous rolling and friction, the size of the coarse particles gradually decreases, and their surfaces become smoother. This grinding process not only refines coarse particles but also alters their physicochemical properties to some extent, making the ground material more suitable for further processing.

[0050] After grinding, the material re-enters the dispersing and classifying mill 3 via the first bucket elevator 9 for further dispersing and classification. The function of the first bucket elevator 9 is to efficiently lift the material after grinding by the vertical mill 7 to a suitable height so that it can smoothly re-enter the dispersing and classifying mill 3. This process realizes the orderly circulation of materials between different processing equipment, ensuring that the physical state of the material can be continuously optimized through multiple dispersing and classification operations.

[0051] When the material re-enters the dispersing and classifying machine 3, it will repeat some of the previous dispersing and sorting operations to further improve the dispersion and particle uniformity of the material. After this round of processing, the fine particles will enter the cyclone separator 4 for gas-solid separation.

[0052] Cyclone 4 plays a crucial role in gas-solid separation within the entire material handling system. When airflow containing fine particles enters cyclone 4, separation occurs based on the differences in the physical properties of the gas and solid phases. The unique internal structure of cyclone 4 creates a high-speed rotating airflow field upon entry. Within this rotating airflow field, solid particles gradually accumulate towards the wall of cyclone 4 due to their own gravity and centrifugal force, eventually sliding down the wall to the bottom, thus achieving the capture of solid particles.

[0053] The gas continues to flow upwards in the central area of ​​the cyclone separator 4 and is discharged through the outlet. In this way, the cyclone separator 4 successfully separates the solid particles and gas from the material entering it.

[0054] The solid particles collected by cyclone separator 4 enter ball mill 8. The specific surface area of ​​the material entering ball mill 8 is 300-450 m². 2 / kg. A ball mill 8 is a device used for fine grinding of solid particles. Inside the ball mill 8, the material undergoes a finer grinding process under the continuous impact and grinding of the steel balls.

[0055] The working principle of ball mill 8 is based on the kinetic energy transfer of steel balls. When ball mill 8 is running, the steel balls inside move continuously with the rotation of the cylinder, colliding and rubbing against each other, while also colliding and grinding with the material. In this way, the size of the material is further reduced, and its specific surface area is continuously increased, thereby achieving fine grinding of the material.

[0056] To fully utilize the secondary hot air from the cyclone separator 4 and the fine particles not captured in the gas, the outlet of the cyclone separator 4 is connected to the outlet of the hot air furnace 5 via a pipe. This connection allows the gas containing uncaptured fine particles discharged from the cyclone separator 4 to re-enter the hot air furnace 5. After being heated by the hot air furnace 5, the fine particles are recaptured by the agitator 3 and can then be used as a heat source again in the material processing process.

[0057] On the one hand, the reuse of secondary hot air can effectively save energy and reduce energy consumption in the entire material processing process. On the other hand, after the fine particles that are not captured in the gas re-enter the hot air furnace 5, they will undergo some physical and chemical changes again in the high-temperature environment of the hot air furnace 5. The powder separator 3 may be further dispersed and dried, and then re-enter the subsequent processing equipment with the hot air, further improving the material processing effect.

[0058] The material collected in the cyclone separator 4 enters the ball mill 8 for fine grinding. The finished product discharged from the outlet of the ball mill 8 is conveyed by the screw conveyor 13 to the inlet of the second bucket elevator 14, and then enters the finished product silo 15 through the outlet of the second bucket elevator 14. The screw conveyor 13 plays a role in smoothly conveying the finished product, ensuring that the finished product discharged from the ball mill 8 can be conveyed to the second bucket elevator 14 at a stable flow rate and speed.

[0059] The second bucket elevator 14 is responsible for lifting the finished product to a suitable height so that it can smoothly enter the finished product silo 15. The finished product silo 15 serves as the final destination of the entire material handling process and is used to store the finished products that have passed the qualification standards after a series of processing steps.

[0060] Meanwhile, the inlet of the bag filter 10 is connected to the outlet of the ball mill 8. The fine dust generated by the ball mill 8 is collected by the bag filter 10 and conveyed by the screw conveyor 13 to the inlet of the second bucket elevator 14, entering the finished product silo 15. The specific surface area of ​​the finished product is 600-700 m². 2 / kg. The baghouse dust collector 10 plays a crucial role in the entire system, effectively capturing the fine dust generated by the ball mill 8 during the discharge process.

[0061] During the fine grinding process of the ball mill 8, the intense collision and grinding between the steel balls and the material inevitably generates some fine dust. If this fine dust is not collected and treated, it will not only cause material loss but also pollute the surrounding environment. The bag filter dust collector 10, through its special filter material and structural design, can effectively collect this fine dust.

[0062] Then, the collected fine dust is conveyed again by screw conveyor 13 to the air inlet of the second bucket elevator 14, and finally enters the finished product silo 15 along with other finished products. This not only ensures the quality of the finished product, but also allows the specific surface area of ​​the finished product to reach 600-700 m². 2 The / kg qualification standard also ensures full utilization of materials and avoids material waste and environmental pollution.

[0063] In summary, the material processing equipment and process involved in this application embodiment can efficiently and accurately process materials such as spodumene concentrate through close cooperation and collaborative work between various devices, realizing the complete transformation from raw materials to qualified finished products. It has significant advantages in improving material processing efficiency, ensuring finished product quality, saving energy and protecting the environment.

[0064] 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 fine grinding system for wet materials with high fine powder content, comprising a fine grinding process system for wet materials, characterized in that: The wet material fine grinding process system includes a feeding device, a sorting device, a heating device, a grinding device, and a dust collection device. The feeding device includes a vibrating feeder (1) and a lock-air feeder (2), with the discharge port of the vibrating feeder (1) connected to the inlet of the lock-air feeder (2). The sorting device includes a dispersing separator (3) and a cyclone separator (4), with the inlet of the dispersing separator (3) connected to the discharge port of the lock-air feeder (2). The fine material outlet of the cyclone separator (4) is connected to the feed inlet of the cyclone separator (4). The heating device includes a hot air furnace (5) and a first blower (6). The air outlet of the first blower (6) is connected to the air inlet of the hot air furnace (5). The air outlet of the hot air furnace (5) is connected to the air inlet of the powder separator (3). The air outlet of the cyclone separator (4) is connected to the air inlet of the hot air furnace (5) through a pipe. The grinding device includes a vertical mill (7) and a ball mill (8). One side of the vertical mill (7) is equipped with a ball mill. The first bucket elevator (9) is connected to the discharge port of the vertical mill (7) via the first bucket elevator (9) and the dispersing and classifying mill (3). The inlet of the ball mill (8) is connected to the bottom outlet of the cyclone separator (4). The dust collection device includes a bag filter (10), a second fan (11), and an exhaust tower (12). The inlet of the bag filter (10) is connected to the outlet of the ball mill (8), and the outlet of the bag filter (10) is connected to the second fan (12). The air inlet of the second fan (11) is connected to the air outlet of the second fan (11) and one side of the discharge tower (12). The bottom end of the bag dust collector (10) is provided with a screw conveyor (13). One side of the screw conveyor (13) is provided with a second bucket elevator (14). One side of the second bucket elevator (14) is provided with a finished product silo (15). The bottom outlet of the bag dust collector (10) and the outlet of the ball mill (8) are both connected to the screw conveyor (13).

2. The fine grinding system based on wet materials with high fine powder content according to claim 1, characterized in that: The powder separator (3) includes a sorting component (31), a dispersing component (32) and a discharge component (33). The bottom end of the sorting component (31) is fixedly connected to the top end of the dispersing component (32), and the bottom end of the dispersing component (32) is fixedly connected to the top end of the discharge component (33).

3. The fine grinding system based on wet materials with high fine powder content according to claim 2, characterized in that: The sorting assembly (31) includes a first motor (311) and a first bearing (315). A sorting housing (319) is provided on one side of the first motor (311). A feed shaft (313) is installed inside the sorting housing (319). A first pulley is fixedly installed on the output end of the first motor (311) and the surface of the feed shaft (313). A first belt (312) is connected between the two first pulleys. A first bearing seat (314) is provided in the middle of the feed shaft (313). The interior of the first bearing seat (314) is connected to the bottom end of the first bearing (315). The feed shaft (313) is connected to the first bearing (315). A number of moving blades (316) are installed on the surface of the feed shaft (313). A number of stationary blades (317) located on one side of the moving blades (316) are installed on the feed shaft (313). A fine material outlet (318) is opened on one side of the sorting housing (319).

4. The fine grinding system based on wet materials with high fine powder content according to claim 2, characterized in that: The dispersing assembly (32) includes a dispersing housing and four fixed plates (322). The dispersing housing has a dispersing cavity (321) inside. The two ends of the inner wall of the dispersing cavity (321) are fixedly connected to one end of the four fixed plates (322). A second bearing seat (323) is installed between each pair of fixed plates (322). A second bearing (324) is installed inside each of the two second bearing seats (323). A shaft (325) passing through the two second bearings (324) is installed inside the dispersing housing. A second motor (326) is provided on one side of the dispersing housing. A second pulley is fixedly installed on the output end of the second motor (326) and the surface of the shaft (325). A second belt (327) is connected between the two second pulleys.

5. The fine grinding system based on wet materials with high fine powder content according to claim 4, characterized in that: A number of expansion sleeves (328) are installed in the middle of the shaft (325). A portion of the expansion sleeves (328) have arc-shaped blades (329) fixedly installed on both sides, and the remaining portion of the expansion sleeves (328) have rectangular blades (330) fixedly installed on both sides. The arc-shaped blades (329) and rectangular blades (330) are arranged at intervals from top to bottom, and the arc-shaped blades (329) and rectangular blades (330) form a dispersible blade structure.

6. The fine grinding system based on wet materials with high fine powder content according to claim 5, characterized in that: The length of the arc-shaped blade (329) is 0.7-0.9 times the length of the rectangular blade (330).

7. The fine grinding system based on wet materials with high fine powder content according to claim 2, characterized in that: The discharge assembly (33) includes a discharge truncated cone (331) and three hot air inlet pipes (332). The three hot air inlet pipes (332) form the air inlet of the powder separator (3). The bottom end of the discharge truncated cone (331) is fixedly connected to the top end of the three hot air inlet pipes (332), and the three hot air inlet pipes (332) are arranged in a triangle. A shaft outlet (333) is opened in the middle of the bottom end of the discharge truncated cone (331), and a coarse material outlet (334) is opened on one side of the bottom end of the discharge truncated cone (331).

8. The fine grinding system based on wet materials with high fine powder content according to claim 7, characterized in that: The bottom ends of the three hot air inlet pipes (332) are all fixedly connected to the air outlet of the hot air furnace (5). After secondary grinding by the ball mill (8), the material enters the finished product silo (15) via the screw conveyor (13) and the second bucket elevator (14). The specific surface area of ​​the finished material is 600 m². 2 / kg-700m 2 / kg.

9. The fine grinding system based on wet materials with high fine powder content according to claim 1, characterized in that: The material separated by the powder separator (3) is collected by the cyclone separator (4), and the material collected by the cyclone separator (4) has a specific surface area of ​​300 m². 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot air furnace (5) is blown into the powder separator by the first blower (6). The outlet temperature of the hot air furnace (5) is 300-400℃. The secondary hot air generated by the cyclone (4) is connected to the outlet of the hot air furnace (5) through the pipeline.

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