Fine grinding system based on wet material with high fine powder content

Abstract

The invention discloses a fine grinding system based on a wet material with high fine powder content, which comprises a wet material fine grinding process system, the wet material fine grinding process system is internally provided with a feeding device, a sorting device, a heating device, a grinding device and a dust collecting device, the feeding device comprises a vibrating feeder and an air locking feeder, and the dust collecting device comprises a dust collecting device. The fine grinding system comprises a vibrating feeder and an air-lock feeder, an air outlet of the vibrating feeder is communicated with an air inlet of the air-lock feeder, the sorting system device comprises a scattering powder concentrator and a cyclone, an air inlet of the scattering powder concentrator is communicated with an air outlet of the air-lock feeder, and a fine material outlet of the scattering powder concentrator is connected with an air inlet of the cyclone. By arranging the scattering powder concentrator, high-humidity materials with fine powder content are dried, scattered and concentrated, the fine particle content of the materials entering the vertical mill is reduced, the operation stability of the vertical mill is improved, high-speed rotating blades in the scattering powder concentrator can scatter and separate agglomerates obtained after grinding of the vertical mill, and the powder concentration efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of ore processing, in particular to a fine grinding system based on wet materials with high fine powder content. Background Art

[0002] With the continuous development of industrial technology, the market's requirements for the fineness of inorganic non-metallic mineral particles are constantly increasing. Some non-metallic minerals need to be ground and processed multiple times in industrial production to achieve the purpose of efficient utilization. Typical non-metallic minerals include lithium slag, which is an industrial waste slag produced in the production process of lithium salts. Since lithium slag contains active oxides such as SiO2 and Al2O3, lithium slag can be used as an auxiliary gelling material after mechanical grinding. However, the fine powder content in lithium slag powder is relatively high. When using grinding equipment for grinding, the grinding equipment vibrates violently due to the instability of the material layer, which reduces the grinding efficiency. There are many non-metallic minerals similar to lithium slag, such as spodumene concentrate. During the grinding process, a large amount of charge accumulates on the surface of the particles and the van der Waals force between the fine particles, resulting in agglomeration of the fine particles, which reduces the powder selection efficiency of the powder selector, so it needs to be deagglomerated.

[0003] However, conventional grinding of wet materials with high fine powder content has the following disadvantages:

[0004] 1. The high content of fine powder in the material causes the material layer to be unstable, resulting in vibration of the grinding equipment and reducing the grinding efficiency;

[0005] 2. The dried materials and the materials after grinding entering the sorting equipment are agglomerated, which reduces the powder selection efficiency of the sorting equipment. Traditional deagglomeration methods include coupling agents, surfactants and polymerizers. This method not only increases production costs but also may affect the basic properties of the materials. Summary of the invention

[0006] The object of the present invention is to provide a fine grinding system based on wet materials with high fine powder content to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a fine grinding system based on wet materials with high fine powder content, including a wet material fine grinding process system, wherein the wet material fine grinding process system is provided with a feeding device, a sorting device, a heating device, a grinding device and a dust collecting device, the feeding device includes a vibrating feeder and an air-locking feeder, the air outlet of the vibrating feeder is connected to the air inlet of the air-locking feeder, the sorting system device includes a powder dispersing machine and a cyclone, the air inlet of the powder dispersing machine is connected to the air outlet of the air-locking feeder, the fine material outlet of the powder dispersing machine is connected to the air inlet of the cyclone, the heating device includes a hot blast furnace and a first fan, the air outlet of the first fan is connected to the air inlet of the hot blast furnace, and the outlet of the hot blast furnace is connected to the air outlet of the hot blast furnace. The air inlet and the air outlet of the cyclone are both connected to the air inlet of the powder dispersing and selecting machine. 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 powder dispersing and selecting machine through the first bucket elevator. The air inlet of the ball mill is connected to the air outlet of the cyclone. The dust collecting device includes a bag dust collector, a second fan and a discharge tower. The air inlet of the bag dust collector is connected to the air outlet of the ball mill, and the air outlet of the bag dust collector is connected to the air inlet of the second fan. The air outlet of the second fan is connected to one side of the discharge tower. A screw conveyor is provided at the bottom end of the bag dust collector, and a second bucket elevator is provided on one side of the screw conveyor. A finished product bin is provided on one side of the second bucket elevator.

[0008] Preferably, the powder scattering classifier comprises a sorting component, a scattering component and a discharging component, the bottom end of the sorting component is fixedly connected to the top end of the scattering component, and the bottom end of the scattering component is fixedly connected to the top end of the discharging component.

[0009] Preferably, the sorting component includes a first motor and a first bearing, a sorting casing is provided on one side of the first motor, a feed shaft is installed inside the sorting casing, first pulleys are fixedly installed on the output end of the first motor and the surface of the feed shaft, a first belt is transmission-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 casing, a gas-solid mixed flow enters the moving blades and the stationary blades, fine particles smaller than 80μm are discharged from the fine material outlet through the moving blades, and coarse particles larger than 80μm fall into the scattering component.

[0010] Preferably, the scattering assembly includes a scattering casing and four fixed plates, a scattering cavity is opened inside the scattering casing, two ends on both sides of the inner wall of the scattering cavity are fixedly connected to one end of the four fixed plates respectively, a second bearing seat is installed between every two fixing plates opposite to the fixing plates, a second bearing is installed inside the two second bearing seats, a shaft passing through the two second bearings is installed inside the scattering casing, a second motor is provided on one side of the scattering casing, a second pulley is fixedly installed on the output end of the second motor and the surface of the shaft, a second belt is transmission-connected between the two second pulleys, the second motor is started after being energized, the second motor drives the second pulley connected to it to rotate, the second pulley drives the second pulley adjacent to it to rotate through the second belt, and the second pulley drives the shaft to rotate.

[0011] Preferably, a plurality of expansion sleeves are installed in the middle of the shaft, arc-shaped blades are fixedly installed on both sides of a part of the expansion sleeves, and rectangular blades are fixedly installed on both sides of the remaining part of the expansion sleeves, and the arc-shaped blades and the rectangular blades form a broken blade structure, and the arc-shaped blades are 0.7-0.9 times the length of the rectangular blades.

[0012] Preferably, the discharging assembly includes a discharging cone and three hot air inlet pipes, the bottom end of the discharging cone is fixedly connected to the top ends of the three hot air inlet pipes, and the three hot air inlet pipes are arranged in a triangle, an axis opening is opened in the middle of the bottom end of the discharging cone, and a coarse air outlet is opened on one side of the bottom end of the discharging cone. The transmission of the powder dispersing and selecting machine is externally mounted, and the 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 the ball mill, the material enters the finished product warehouse through a screw conveyor and a second bucket elevator. The specific surface area of ​​the finished material is 600m 2 / kg-700m 2 / kg, the materials separated by the powder separator are collected by the cyclone, and the specific surface area of ​​the materials collected by the cyclone is 300m 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot blast furnace is blown into the powder separator through the first fan, and the outlet temperature of the hot blast furnace 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 outlet of the hot blast furnace through a pipeline in this system.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

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

[0016] First, the present invention is specially provided with a key device, a powder separator, which can play an important role in many aspects when facing wet materials with high fine powder content. On the one hand, it can efficiently dry such wet materials. Through a specific heating mechanism and a reasonable internal air circulation design, the moisture in the wet materials can be quickly evaporated, greatly reducing its humidity, thereby creating more favorable conditions for subsequent processing.

[0017] On the other hand, the powder separator also has an excellent breaking function. For materials that may form agglomerates due to various reasons, it uses internal high-speed rotating blades and other components to effectively break up the originally gathered material particles through strong impact, stirring and other actions. This allows the material to be processed in a more uniform and dispersed state in the subsequent processing process, avoiding problems such as uneven and insufficient processing that may be caused by agglomeration.

[0018] In addition, the powder separator also undertakes the important task of powder selection. It can accurately screen and separate materials according to the size, density and other characteristics of the material particles, screen out fine particles that meet specific requirements, and deal with coarse particles that do not meet the requirements accordingly.

[0019] At the same time, after the high-speed rotating blades inside the powder separator in the present invention complete the grinding operation in the vertical mill, the materials often form agglomerates again due to various factors. At this time, the high-speed rotating blades in the powder separator can break up and separate these agglomerates again with their strong power and ingenious design. In this way, the agglomerates that may affect the subsequent powder selection efficiency and product quality are handled in a timely and effective manner, so that the entire powder selection process can be carried out more smoothly and efficiently, and finally the powder selection efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A simplified diagram of the present invention;

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

[0022] Figure 3 It is a cross-sectional view of the separation part of the powder separator of the present invention;

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

[0024] Figure 5 It is a top view of the discharging truncated table assembly of the powder separator of the present invention.

[0025] In the figure: 1, vibrating feeder; 2, air lock feeder; 3, powder separator; 31, separator assembly; 311, first motor; 312, first belt; 313, feed shaft; 314, first bearing seat; 315, first bearing; 316, moving blade; 317, stationary blade; 318, fine material outlet; 319, separator housing; 32, separator assembly; 321, separator chamber; 322, fixed plate; 323, second bearing seat; 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 cone; 332, hot air inlet pipe; 333, shaft outlet; 334, coarse material outlet; 4, cyclone; 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 warehouse. DETAILED DESCRIPTION

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

[0027] See also Figure 1-5 The present invention provides a fine grinding system based on wet materials with high fine powder content, including a wet material fine grinding process system, wherein a feeding device, a sorting device, a heating device, a grinding device and a dust collecting device are arranged in the wet material fine grinding process system, the feeding device includes a vibrating feeder 1 and an air-locking feeder 2, the air outlet of the vibrating feeder 1 is connected to the air inlet of the air-locking feeder 2, the sorting system device includes a powder dispersing and selecting machine 3 and a cyclone 4, the air inlet of the powder dispersing and selecting machine 3 is connected to the air outlet of the air-locking feeder 2, the fine material outlet of the powder dispersing and selecting machine 3 is connected to the air inlet of the cyclone 4, the heating device includes a hot air furnace 5 and a first fan 6, the air outlet of the first fan 6 is connected to the air inlet of the hot air furnace 5, the air outlet of the hot air furnace 5 and the air outlet of the cyclone 4 are both connected to the powder dispersing and selecting machine The air inlet of the vertical mill 7 is connected to the air inlet of the powder classifier 3, the grinding device 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 powder classifier 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 collecting device includes a bag dust collector 10, a second fan 11 and a discharge 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 discharge tower 12, a screw conveyor 13 is provided at the bottom end of the bag dust collector 10, a second bucket elevator 14 is provided on one side of the screw conveyor 13, and a finished product bin 15 is provided on one side of the second bucket elevator 14.

[0028] The powder scattering classifier 3 comprises a sorting component 31 , a scattering component 32 and a discharging component 33 . The bottom end of the sorting component 31 is fixedly connected to the top end of the scattering component 32 , and the bottom end of the scattering component 32 is fixedly connected to the top end of the discharging 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. Then, the feed shaft 313 is connected to the first bearing 315, and a plurality of moving blades 316 are installed on the surface of the feed shaft 313. A plurality 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 machine housing 319. The gas-solid mixed flow enters the moving blades 316 and the stationary blades 317. The fine particles smaller than 80μm pass through the moving blades 316 and are discharged from the fine material outlet 318, and the coarse particles larger than 80μm fall into the scattering component 32.

[0030] The scattering assembly 32 includes a scattering casing and four fixed plates 322. A scattering chamber 321 is provided inside the scattering casing. The two ends on both sides of the inner wall of the scattering chamber 321 are fixedly connected to one end of the four fixed plates 322 respectively. A second bearing seat 323 is installed between every two fixed plates 322. Second bearings 324 are installed inside the two second bearing seats 323. A shaft 325 passing through the two second bearings 324 is installed inside the scattering casing. A second motor 326 is provided on one side of the scattering casing. 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 transmission-connected between the two second pulleys. The second motor 326 is started after being energized, and the second motor 326 drives the second pulley connected thereto to rotate. The second pulley drives the second pulley adjacent to it to rotate through the second belt 327, and the second pulley drives the shaft 325 to rotate.

[0031] A number of expansion sleeves 328 are installed in the middle of the shaft 325, and arc-shaped blades 329 are fixedly installed on both sides of a part of the expansion sleeves 328, and rectangular blades 330 are fixedly installed on both sides of the remaining expansion sleeves 328. The blade shapes of the breaking up components can be divided into arc-shaped blades 329 and rectangular blades 330. The arc-shaped blades 329 are 0.7-0.9 times the length of the rectangular blades 330.

[0032] The discharging assembly 33 includes a discharging cone 331 and three hot air inlet pipes 332. The bottom ends of the discharging cone 331 are fixedly connected to the top ends of the three hot air inlet pipes 332, and the three hot air inlet pipes 332 are arranged in a triangle. An axial outlet 333 is provided in the middle of the bottom end of the discharging cone 331, and a coarse air outlet 334 is provided on one side of the bottom end of the discharging cone 331. The transmission of the powder dispersing and selecting machine 3 is externally mounted, and the materials that cannot be dispersed are 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 fixedly connected to the air outlet of the hot air furnace 5. After the material is ground twice by the ball mill 8, it enters the finished product warehouse 15 through the screw conveyor 13 and the second bucket elevator 14. The specific surface area of ​​the finished material is 600m 2 / kg-700m 2 / kg, the powder separator 3 selects the materials and collects them through the cyclone 4. The specific surface area of ​​the materials collected by the cyclone 4 is 300m 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot blast furnace 5 is blown into the powder separator 3 through the first blower 6, and the outlet temperature of the hot blast furnace 5 is 300-400°C. In order to improve the utilization rate of hot air, the secondary hot air generated by the cyclone 4 in this system is connected to the outlet of the hot blast furnace 5 through a pipeline.

[0034] Vibrating feeder 1 plays a crucial opening role in the whole process. Materials such as spodumene concentrate, especially when the fine powder content is as high as nearly 80%, show relatively complex physical properties. Large pieces of wet materials need to be processed by vibrating feeder 1 before entering the subsequent processing link. Vibrating feeder 1 relies on its unique vibration principle and through continuous and regular vibration action, it cleverly disperses large pieces of wet materials into small pieces of loose materials. This process is not a simple physical split, but has important significance.

[0035] On the one hand, due to the high fine powder content of spodumene concentrate, if it is not evenly dispersed, subsequent equipment may face many problems during processing. For example, uneven feeding may cause material accumulation in some areas, while other areas are lacking in material, which in turn affects the overall processing efficiency and effect. Through the uniform dispersion effect of the vibrating feeder 1, the wet material with a high fine powder content can smoothly enter the air lock 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 appropriate conditions.

[0036] On the other hand, the parameters such as the vibration frequency and amplitude of the vibrating feeder 1 are carefully designed and debugged. Appropriate vibration parameters can achieve the best dispersion effect without destroying the original physical and chemical properties of the material. This is crucial to maintaining the quality of spodumene concentrate and the feasibility of subsequent processing.

[0037] Next, the material enters the air-locking feeder 2. The air-locking feeder 2 has a special mission in the entire material handling system, which is to prevent the high-speed hot air in the powder-dispersing machine 3 from escaping. In the material handling process, the effective use and control of hot air is one of the key factors affecting the processing efficiency and quality. When the powder-dispersing machine 3 performs operations such as rapid drying and dispersing of the material, it is necessary to maintain a stable circulation of internal hot air and a specific temperature and airflow state. If the hot air escapes at will, it will not only cause a waste of energy, but also destroy the carefully created processing environment inside the powder-dispersing machine 3, resulting in the material failing to obtain the expected drying and dispersing effect.

[0038] The air-locking feeder 2 effectively blocks the hot air through its precise structural design and working principle, ensuring that the hot air inside the powder-breaking and classifying machine 3 can circulate in a relatively closed and stable environment. At the same time, it can also ensure that the material can be smoothly and orderly transported from itself to the powder-breaking and classifying machine 3, achieving a good connection between the material and the hot air environment.

[0039] When the material enters the powder separator 3, a series of key processing steps are ushered in. The powder separator 3 can be said to be one of the core equipment in the entire material processing process. It has multiple functions and can quickly dry and scatter the material, thereby achieving the initial transformation of the material's physical state.

[0040] Inside the powder separator 3, the material will first be impacted by high-speed hot air. Since the internal temperature is set in a specific range of 150-250°C, it will have a significant impact on the spodumene concentrate entering it, especially those wet fine particles. Some wet fine particles will be quickly heated after contacting the high-speed hot air flow. This rapid heating process allows the moisture inside the wet fine particles to evaporate quickly, thereby achieving a preliminary drying effect.

[0041] At the same time, with the flow of hot air and the action of the rotating parts inside the powder separator 3, the material will undergo a further dispersion process. After the material enters the powder separator 3 through the feed shaft 313, it will interact with the high-speed rotating blades 316. Driven by the high-speed rotation of the blades 316, the material is continuously thrown and hit, and some larger particles or particles that may have originally existed begin to be gradually dispersed.

[0042] Moreover, the fine particle agglomerates will be further broken up by the arc blades 329 and the rectangular blades 330 in this process. The shapes, angles and arrangements of the arc blades 329 and the rectangular blades 330 have been repeatedly tested and optimized. The rectangular blades 330, with their relatively regular shapes and specific angles, can effectively break up the agglomerates for the first time, breaking up some larger agglomerated particles into relatively smaller particle sets. On this basis, the arc blades 329, using their arc-shaped structural characteristics, can perform a more detailed breaking up operation on the particles processed by the rectangular blades 330, so that the agglomerates can be completely broken up into individual fine particles.

[0043] After such a series of breaking up and drying operations, the agglomerated wet particles after breaking up will be dried again and then discharged with the air flow. At this time, the material has achieved a relatively ideal physical state transformation in the powder separator 3, and is ready for subsequent further processing.

[0044] In the process of the powder separator 3 processing the material, in order to ensure that the coarse particles can be completely discharged, a discharge round platform 331 is provided at the bottom. The design of the discharge round platform 331 takes into account the physical properties and movement laws of the coarse particles. Since the coarse particles may have been partially dispersed after the previous processing, there may still be some relatively large particles, which will gradually gather to the bottom under the action of gravity.

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

[0046] At the same time, in order to prevent the material from affecting the transmission of the equipment, the transmission of the scattering component 32 is external. This external transmission design can isolate the transmission components of the equipment from the material processing area, effectively preventing the material from causing adverse effects such as wear and corrosion on the transmission components during the processing process, thereby ensuring the stability and reliability of the equipment transmission and extending the service life of the equipment.

[0047] A shaft outlet 333 is provided at the center of the discharging truncated platform 331, and one end of the shaft 325 can be extended for transmission. Such a design not only meets the transmission requirements of the equipment, but also does not affect the normal discharge of materials at the discharging truncated platform 331 due to the existence of the shaft, thus achieving harmonious coexistence of transmission and material discharge.

[0048] After being processed by the powder separator 3, the materials are separated according to the particle size. The coarse particles enter the vertical mill 7 for grinding due to gravity. The vertical mill 7 is a device specially used for efficient grinding of coarse particles. When the coarse particles enter the vertical mill 7, they will undergo a continuous grinding process under the action of the grinding components inside it.

[0049] The grinding principle of the vertical mill 7 is based on strong pressure and friction. During the grinding process, the coarse particles are tightly squeezed between the grinding parts. Through continuous rolling and friction, the size of the coarse particles gradually decreases and their surface becomes smoother. This grinding process can not only refine the coarse particles, but also change their physical and chemical properties to a certain extent, making the milled materials more suitable for subsequent further processing.

[0050] The ground material enters the powder-splitting and classifying machine 3 again through the first bucket elevator 9 for breaking and classifying. The function of the first bucket elevator 9 is to efficiently lift the material ground by the vertical mill 7 to a suitable height so that it can smoothly enter the powder-splitting and classifying machine 3 again. This process realizes the orderly circulation of materials between different processing equipment, ensuring that the physical state of the materials can be continuously optimized in multiple breaking and classifying operations.

[0051] When the material enters the powder separator 3 again, the previous breaking and sorting operations will be repeated to further improve the dispersion degree and particle uniformity of the material. After this round of processing, the fine particles will enter the cyclone 4 for gas-solid separation.

[0052] The cyclone 4 plays an important role in gas-solid separation in the entire material handling system. When the airflow containing fine particles enters the cyclone 4, it will be separated according to the difference in physical properties between the gas and solid phases. The special structural design inside the cyclone 4 allows the airflow to form a high-speed rotating airflow field after entering. In this rotating airflow field, the solid particles will gradually gather on the wall of the cyclone 4 due to their own gravity and centrifugal force, and finally slide down the wall to the bottom, thus capturing the solid particles.

[0053] The gas will continue to flow upward in the central area of ​​the cyclone 4 and be discharged through the air outlet. In this way, the cyclone 4 successfully separates the solid particles and gas in the material entering therein.

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

[0055] The working principle of the ball mill 8 is based on the kinetic energy transfer of the steel balls. When the ball mill 8 is running, the steel balls inside will continue to move with the rotation of the cylinder, and they will collide and rub against each other, and also collide and grind with the materials. In this way, the size of the material will be further reduced, and its specific surface area will continue to increase, thereby achieving fine grinding of the material.

[0056] In order to make full use of the secondary hot air of the cyclone 4 and the uncaptured fine particles in the gas, the outlet of the cyclone 4 is connected to the outlet of the hot blast furnace 5 through a pipeline. This connection method allows the gas containing uncaptured fine particles discharged from the cyclone 4 to enter the hot blast furnace 5 again. After being heated by the hot blast furnace 5, the powder separator 3 re-captures the fine particles and can be used as a heat source to participate in the material processing process again.

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

[0058] After the materials collected by the cyclone 4 enter the ball mill 8 for fine grinding, the finished products discharged from the air outlet of the ball mill 8 are conveyed to the air inlet of the second bucket elevator 14 through the screw conveyor 13, and enter the finished product bin 15 through the air outlet of the second bucket elevator 14. The screw conveyor 13 plays a role in smoothly conveying the finished products, which can ensure that the finished products 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 warehouse 15. The finished product warehouse 15 is the final destination of the entire material processing process and is used to store finished products that meet the qualified standards after a series of treatments.

[0060] At the same time, the air inlet of the bag dust collector 10 is connected to the air outlet of the ball mill 8. The fine dust generated by the ball mill 8 is captured by the bag dust collector 10 and conveyed to the air inlet of the second bucket elevator 14 through the screw conveyor 13 and enters the finished product warehouse 15. The specific surface area of ​​the finished product is 600-700m 2 / kg. The bag dust collector 10 plays a vital role in the whole system. It can effectively capture the fine dust generated by the ball mill 8 during the discharging process.

[0061] During the fine grinding process of the ball mill 8, due to the strong collision and grinding between the steel balls and the materials, some fine dust will inevitably be generated. If these fine dusts are not captured and processed, they will not only cause material loss, but also pollute the surrounding environment. The bag dust collector 10 can effectively capture these fine dusts through its special filtering materials and structural design.

[0062] Then, the captured fine dust is transported to the air inlet of the second bucket elevator 14 through the screw conveyor 13, and finally enters the finished product warehouse 15 together with other finished products. In this way, the quality of the finished product is guaranteed, and the specific surface area of ​​the finished product can reach 600-700m 2 / kg qualified standard, and at the same time, it also realizes the full utilization of materials and avoids material waste and environmental pollution.

[0063] To sum up, the set of material processing equipment and processes involved in the embodiments of the present application, through the close cooperation and collaborative work between various equipment, can efficiently and accurately process spodumene concentrate and other similar materials, and realize 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fine grinding system based on wet materials with high fine powder content, including a wet material fine grinding process system, characterized in that: The wet material fine grinding process system is provided with a feeding device, a sorting device, a heating device, a grinding device and a dust collecting device. The feeding device comprises a vibrating feeder (1) and an air-locking feeder (2). The air outlet of the vibrating feeder (1) is connected to the air inlet of the air-locking feeder (2). The sorting system device comprises a powder-splitting and selecting machine (3) and a cyclone (4). The air inlet of the powder-splitting and selecting machine (3) is connected to the air inlet of the air-locking feeder (2). The fine material outlet of the powder-breaking and selecting machine (3) is connected to the air inlet of the cyclone (4); the heating device comprises a hot air furnace (5) and a first fan (6); the air outlet of the first fan (6) is connected to the air inlet of the hot air furnace (5); the air outlet of the hot air furnace (5) and the air outlet of the cyclone (4) are both connected to the air inlet of the powder-breaking and selecting machine (3); the grinding device comprises 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 powder dispersing and selecting 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 collecting device comprises a bag dust collector (10), a second fan (11) and a discharge 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 discharge tower (12), a screw conveyor (13) is provided at the bottom end of the bag dust collector (10), a second bucket elevator (14) is provided on one side of the screw conveyor (13), and a finished product bin (15) is provided on one side of the second bucket elevator (14).

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

3. The fine grinding system based on wet materials with high fine powder content according to claim 2 is characterized in that: The sorting assembly (31) comprises 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 middle portion of the feed shaft (313) is provided with a first belt (312); A first bearing seat (314) is provided, 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 plurality of moving blades (316) are installed on the surface of the feed shaft (313), a plurality of stationary blades (317) located on one side of the moving blades (316) are installed on the feed shaft (313), and a fine material outlet (318) is opened on one side of the sorting machine housing (319).

4. The fine grinding system based on wet materials with high fine powder content according to claim 2 is characterized in that: The scattering assembly (32) includes a scattering casing and four fixed plates (322) connected to the cylinder wall in the figure, a scattering chamber (321) is provided inside the scattering casing, and the two ends of the inner wall of the scattering chamber (321) are respectively fixedly connected to one end of the four fixed plates (322), a second bearing seat (323) is installed between each two fixed plates (322), and a second bearing (324) is installed inside the two second bearing seats (323), and a shaft (325) passing through the two second bearings (324) is installed inside the scattering casing, and a second motor (326) is provided on one side of the scattering casing, and a second pulley is fixedly installed on the output end of the second motor (326) and the surface of the shaft (325), and 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 is characterized in that: A plurality of expansion sleeves (328) are installed in the middle of the shaft (325), arc-shaped blades (329) are fixedly installed on both sides of a portion of the expansion sleeves (328), and rectangular blades (330) are fixedly installed on both sides of the remaining expansion sleeves (328), and the arc-shaped blades (329) and the rectangular blades (330) form a scattered blade structure.

6. The fine grinding system based on wet materials with high fine powder content according to claim 5 is 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 is characterized in that: The discharge assembly (33) comprises a discharge truncated plate (331) and three hot air inlet pipes (332); the bottom end of the discharge truncated plate (331) is fixedly connected to the top ends of the three hot air inlet pipes (332), respectively, and the three hot air inlet pipes (332) are arranged in a triangular shape; an axial opening (333) is provided in the middle of the bottom end of the discharge truncated plate (331); and a coarse air outlet (334) is provided on one side of the bottom end of the discharge truncated plate (331).

8. The fine grinding system based on wet materials with high fine powder content according to claim 7 is characterized in that: The bottom ends of the three hot air inlet pipes (332) are fixedly connected to the air outlet of the hot air furnace (5). After secondary grinding in the ball mill (8), the material enters the finished product bin (15) through the screw conveyor (13) and the second bucket elevator (14). The specific surface area of ​​the finished material is 600m 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 materials separated by the powder separator (3) are collected by the cyclone (4). The specific surface area of ​​the materials collected by the cyclone (4) is 300m 2 / kg-450m 2 / kg, the high-temperature gas generated by the hot blast furnace (5) is blown into the powder dispersing and selecting machine through the first blower (6), the outlet temperature of the hot blast furnace (5) is 300-400°C, and the secondary hot air generated by the cyclone (6) is connected to the outlet of the hot blast furnace (5) through a pipeline.

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