A composite grading grinding process and preparation mechanism

Abstract

The present invention relates to the technical field of cement production, and specifically discloses a composite classification grinding process and preparation mechanism, including the following steps: S1, primary classification and mixing of materials in A mill; S2, fine screening by V-type classifier; S3, material mixing and roll pressing in intermediate bin; S4, grinding and classification in cement mill; S5, grinding and re-classification in B mill; S6, ultra-fine grinding selection and particle optimization; S7, intelligent control and online adjustment; By means of multiple classification and grinding, the present invention ensures the uniformity of materials, improves the homogeneity of the cement particle size distribution, thereby improving the quality of cement. Through precise classification and grinding, over-grinding and under-grinding of materials are avoided, energy consumption and waste are reduced. Materials with poor activity but good grindability are used as fillers to save the dosage of high-activity materials. The efficient grinding process and intelligent control system reduce unnecessary energy consumption, contribute to reducing carbon emissions. The selection of green raw materials and the resource utilization of waste reduce the environmental impact of cement production.

Description

Technical Field

[0001] The invention belongs to the technical field of cement production, and in particular relates to a composite graded grinding process and a preparation mechanism. Background Art

[0002] With the rapid development of the global economy and the acceleration of the industrialization process, the demand for cement, as an important material for infrastructure construction, continues to grow. However, the high energy consumption and high carbon emissions in the cement production process have become increasingly prominent, becoming one of the important factors in the intensification of the global greenhouse effect. Therefore, how to reduce carbon emissions in the production process while ensuring the quality of cement has become a key issue that the cement industry needs to solve urgently.

[0003] However, traditional cement grinding processes often use a single device and method to grind materials, ignoring the impact of activity differences between different materials on the grinding effect. This process is not only inefficient, but also easily leads to over-grinding or under-grinding of materials, thereby affecting the quality and performance of the finished cement products. Therefore, staff need to improve it to achieve the purpose of carbon reduction. Summary of the invention

[0004] The object of the present invention is to provide a composite graded grinding process and a preparation mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A composite graded grinding process comprises the following steps:

[0007] S1, initial classification and mixing of A-mill materials;

[0008] S2, V-type powder separator for fine screening;

[0009] S3, material mixing and roller pressing in the middle bin;

[0010] S4, grinding and classification of cement mill;

[0011] S5, grinding and reclassification of B mill;

[0012] S6, ultrafine grinding powder selection and particle optimization;

[0013] S7, intelligent control and online adjustment.

[0014] Preferably, in step S1, the clinker dominated by A mill and other materials with higher activity are mixed in a certain proportion and transported to the unpowered grading screen by a bucket elevator. The materials are classified for the first time on the unpowered grading screen, and the coarse particles enter the mixing device of the intermediate bin for mixing to prevent segregation in the bin, and the fine particles enter the distributor of the V-type powder classifier.

[0015] Preferably, in step S2, the fine particles entering the V-type classifier distributor are evenly scattered into the classifier through a large-angle distributing device for sufficient screening. The particles close to the finished product (specific surface area greater than 400 m 2 / g) are secondarily classified under the suction of the circulating fan, enter the dust collector and are collected through the finished product chute (the flow rate is adjusted by a valve).

[0016] Preferably, in step S3, the coarse particles discharged from the V-type classifier and the coarse particle materials separated by the non-powered classifier enter the mixing device in the intermediate bin for sufficient mixing to ensure uniform falling of the materials, generate a constant pressure. The mixed materials enter the roller press for rolling treatment to reduce the particle size of the materials and prepare for subsequent grinding.

[0017] Preferably, in step S4, the materials treated by the roller press enter the cement mill for high-efficiency grinding. By adjusting the size of the grate gap in the mill, dynamic adjustment is achieved to ensure that qualified particles of 3 - 32 μm are timely carried away by the air, avoiding particle size distribution mismatch and over-grinding phenomena.

[0018] Preferably, in step S5, the materials with poor grinding activity and some clinker (dried using the temperature of the clinker) are proportioned and enter the B mill for grinding. After passing through the B mill classifier, the materials with poor activity but good grindability are preferentially selected and enter the finished cement to play a filling role; the remaining clinker particles enter the classifier of the A mill for tertiary classification grinding.

[0019] Preferably, in step S6, the ground materials discharged from the A cement mill enter the modified ultrafine mill classifier for repeated screening to ensure that the qualified 3 - 32 μm materials enter the finished product chute. The finished materials of the A mill and the B mill and the fly ash with coarser particles but larger specific surface area jointly enter the particle optimizer for quality mixing. After being detected and qualified by the on-line particle analyzer, they are sent to the cement silo by a bucket elevator.

[0020] Preferably, in step S7, the intelligent control system real-time monitors the particle size distribution status of the materials and automatically adjusts the primary, secondary, and tertiary classification and grinding processes according to the detection results. At the same time, on-line adjustment is carried out according to the batching plan.

[0021] A composite classification and grinding preparation mechanism, comprising:

[0022] Classification sleeve box;

[0023] One side of the top of the grading nested box is fixedly connected with a feed pipe. One side of the inner wall of the grading nested box is fixedly connected with a lapping frame. One side of the inner wall of the lapping frame is lapped with a buffer spring. The top of the buffer spring is lapped with a first screening plate, and one side of the first screening plate is rotatably connected to the inner wall of the grading nested box. The other side of the inner wall of the grading nested box is rotatably connected with a second screening plate;

[0024] One side of the top of the grading nested box is fixedly connected with a first discharge pipe. The bottom of the other side of the grading nested box is fixedly connected with a second discharge pipe. The bottom end of the second discharge pipe is fixedly connected with a V-shaped powder separator. The bottom of the inner wall of the V-shaped powder separator is fixedly connected with a first driving motor. The output end of the first driving motor is provided with a driving rod. The top end of the driving rod is fixedly connected with an arc-shaped cloth plate. One side of the top of the arc-shaped cloth plate is fixedly connected with multiple groups of bumps. Discharge grooves are formed on both sides of the bottom of the V-shaped powder separator. The bottom ends of the discharge grooves and the first discharge pipe are both fixedly connected with intermediate bins.

[0025] Preferably, one side of the intermediate bin is fixedly connected with a controller. One side of the back of the intermediate bin is fixedly connected with a second driving motor. The output end of the second driving motor is provided with a transmission rod. The front end of the transmission rod is fixedly connected with a connecting rod. One side of the surface of the connecting rod is fixedly connected with multiple groups of first stirring rods. Both sides of the surface of the transmission rod are fixedly connected with transmission wheels. One side of the surface of both transmission wheels is rotatably connected with a transmission belt. One side of the inner wall of both transmission belts is rotatably connected with a driving wheel. One side of the inner wall of the driving wheel is rotatably connected with an adapter rod. The front end of the adapter rod is fixedly connected with a fixing rod. One side of the surface of the fixing rod is fixedly connected with multiple groups of second stirring rods. One side of the bottom of the intermediate bin is fixedly connected with a socket box. One side of the inner wall of the socket box is inserted with a sealing plate, and one side of the surface of the sealing plate is inserted into the inner bottom wall of the intermediate bin. The bottom of the intermediate bin is fixedly connected with a mill. The bottom of the inner wall of the mill is fixedly connected with an assembly box. One side of the inner wall of the assembly box is fixedly connected with a servo motor. The output end of the servo motor is provided with a movable rod. The top end of the movable rod is fixedly connected with a connecting sleeve. One side of the surface of the connecting sleeve is fixedly connected with multiple groups of activation rings. Multiple groups of lining plates are fixedly connected to one side of the inner wall of the mill. One side of the bottom of the mill is fixedly connected with a discharge pipe. The top end of the discharge pipe is fixedly connected with a discharge grate plate. One side of the bottom of the discharge grate plate is connected with a partition plate.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] (1) Through multiple grading and grinding processes, the uniformity of the material is ensured, significantly improving the uniformity of the cement particle size distribution. Precise grading avoids over-grinding and under-grinding of the material, ensuring the consistency and high quality of the final product, thereby improving the overall quality of the cement.

[0028] (2) The efficient grinding process reduces the excessive consumption of highly reactive materials. By using materials with poor activity but good grindability as fillers, the dosage of highly reactive materials is saved. The intelligent control system can monitor and adjust the production process in real time, reduce unnecessary energy consumption, and improve energy utilization efficiency.

[0029] (3) The selection of green raw materials and the resource utilization of waste significantly reduce carbon emissions and environmental impacts during cement production. By using low-energy-consuming and high-efficiency grinding equipment and powder selection equipment, energy consumption and carbon emissions are further reduced.

[0030] (4) The intelligent control system realizes the automation of the production process, reduces manual intervention, improves production efficiency and stability. By integrating high-precision on-line monitoring equipment, it can monitor the particle size distribution of materials in real time and accurately, and automatically adjust the production process according to the monitoring results to ensure that the equipment operates in the best state.

[0031] (5) The process combines multiple steps such as primary classification, fine screening, roll pressing, multiple grinding and classification, and can flexibly respond to different material characteristics and production requirements. By adjusting the raw material ratio, grinding process and the use of performance modifiers, special cement meeting special requirements can be prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the process flow chart of the present invention;

[0033] Figure 2 is the production flow chart of the present invention;

[0034] Figure 3 is the plan view of the present invention;

[0035] Figure 4 is the plan view of the first screening plate of the present invention;

[0036] Figure 5 is the plan view of the first stirring rod of the present invention;

[0037] Figure 6 is the plan view of the partition plate of the present invention;

[0038] In the figure: 1, grading nested box; 2, feed pipe; 3, lapping frame; 4, buffer spring; 5, first screening plate; 6, second screening plate; 7, first discharge pipe; 8, second discharge pipe; 9, V-shaped powder separator; 10, first driving motor; 11, driving rod; 12, arc-shaped cloth plate; 13, bump; 14, discharge chute; 15, intermediate bin; 16, controller; 17, second driving motor; 18, transmission rod; 19, connecting rod; 20, first stirring rod; 21, transmission wheel; 22, transmission belt; 23, driving wheel; 24, connecting rod; 25, fixed rod; 26, second stirring rod; 27, socket box; 28, sealing plate; 29, mill; 30, assembly box; 31, servo motor; 32, movable rod; 33, connecting sleeve; 34, activation ring; 35, lining plate; 36, discharge pipe; 37, discharge grate plate of the mill; 38, partition plate. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1:

[0041] Please refer to Figures 1 to 2 As shown, a composite grading and grinding process includes the following steps:

[0042] S1. Initial grading and mixing of the materials of mill A;

[0043] S2. Fine screening by the V-shaped powder separator;

[0044] S3. Material mixing and roll pressing in the intermediate bin;

[0045] S4. Grinding and grading of the cement mill;

[0046] S5. Grinding and re-grading of mill B;

[0047] S6. Ultrafine grinding powder selection and particle optimization;

[0048] S7. Intelligent control and on-line adjustment.

[0049] In step S1, after proportioning the clinker dominated by mill A and other materials with higher activity, they are transported to the non-powered grading screen through a bucket elevator. The materials are first graded on the non-powered grading screen. The coarse particles enter the mixing device in the intermediate bin for mixing to prevent segregation in the bin, and the fine particles enter the distributor of the V-shaped powder separator.

[0050] In step S2, the cloth device is designed with a large angle, which can ensure that the fine-grained materials entering the V-type separator are evenly scattered, improve the dispersion of the materials, and further enhance the screening effect of the V-type separator, so that the particles close to the finished product (specific surface area greater than 400m 2 / g) can be efficiently separated and collected, reducing the phenomenon of over-grinding and improving the uniformity of the cement particle size distribution.

[0051] In step S3, the coarse particles discharged from the V-type separator and the coarse-grained materials separated by the gravity classifier enter the mixing device in the intermediate bin together for full mixing to ensure the uniform falling of the materials, generate a constant pressure, and avoid the influence of the bin pressure fluctuation on the subsequent roller press. The mixed materials enter the roller press for rolling treatment to reduce the particle size of the materials and prepare for the subsequent grinding.

[0052] In step S4, the materials processed by the roller press enter the cement mill for high-efficiency grinding. By adjusting the size of the grate gap in the mill, dynamic adjustment is achieved to ensure that the qualified 3-32μm particles are taken away by the air in time, avoiding the phenomenon of particle size distribution mismatch and over-grinding.

[0053] In step S5, the materials with poor grinding activity and some clinker (dried using the temperature of the clinker) are proportioned and enter the B mill for grinding. After passing through the B mill separator, the materials with poor activity but good grindability are preferentially selected and enter the finished cement to play a filling role; the remaining clinker particles enter the separator of the A mill for the third-stage classification grinding.

[0054] In step S6, the ground materials discharged from the A cement mill enter the modified ultra-fine mill separator for repeated screening to ensure that the qualified 3-32μm materials enter the finished product chute. The finished materials of the A mill and the B mill and the fly ash with coarser particles but larger specific surface area enter the particle optimizer for quality mixing. After being detected as qualified by the on-line particle analyzer, they are sent to the cement silo by the bucket elevator.

[0055] In step S7, the intelligent control system monitors the particle size distribution of the materials in real time and automatically adjusts the primary, secondary, and tertiary classification and grinding processes according to the detection results. At the same time, on-line adjustment is carried out according to the batching scheme.

[0056] The intelligent control system can monitor the particle size distribution of the materials in the production process in real time and accurately by integrating high-precision on-line monitoring equipment (such as laser particle size analyzers). These devices use advanced technologies such as laser diffraction and image recognition to quickly and continuously measure the particle size distribution of the materials and transmit the data to the control system in real time.

[0057] Primary, secondary, and tertiary classification adjustment: Based on the real-time monitored particle size distribution data, the intelligent control system can automatically analyze and judge whether the classification effects at all levels meet the expectations. If there are deviations, the system will automatically adjust parameters such as the rotational speed of the classifier and the aperture of the sieve mesh according to the preset algorithms and rules to optimize the classification effect and ensure that the particle size distribution of each level of materials meets the production requirements.

[0058] Feedback control: Through continuous monitoring and adjustment, the system can form a closed-loop feedback control mechanism to continuously correct and optimize the classification process, improving the classification accuracy and stability.

[0059] Grinding parameter adjustment: During the grinding process, the intelligent control system will automatically adjust key parameters such as the rotational speed of the grinder, the feeding rate, and the ratio of grinding media according to the changes in the particle size distribution data. By precisely controlling these parameters, the system can optimize the grinding efficiency, improve the product quality, and at the same time reduce energy consumption and costs.

[0060] Optimized grinding strategy: The system will also intelligently select and optimize the grinding strategy according to the material characteristics and production requirements. For example, when producing products with higher fineness, the system will automatically adjust to a more refined grinding mode; while when increasing the production output, it will optimize the grinding parameters to improve the production efficiency.

[0061] The intelligent control system can also adjust the ratio of each material in the production process online according to the preset batching plan, which is achieved through the following steps:

[0062] Batching plan input: Before the system runs, the operator will input the preset batching plan into the control system, and these plans usually include key information such as the ratio of each material and the feeding sequence.

[0063] Real-time monitoring and comparison: During the production process, the system will continuously monitor the actual ratio of each material and compare it with the preset batching plan.

[0064] Automatic adjustment: Once it is found that there is a deviation between the actual ratio and the preset plan, the system will automatically adjust parameters such as the feeding amount or the feeding speed according to the size and direction of the deviation to ensure that the actual ratio is consistent with the preset plan.

[0065] Through the application of the intelligent control system, the enterprise can realize the real-time monitoring and automatic adjustment of the particle size distribution of materials, significantly improving the intelligent level and automation degree of the production process. This can not only reduce the frequency and difficulty of manual intervention, and reduce errors and waste caused by human factors; but also improve the product quality and stability, reduce production costs and energy consumption; at the same time, it also helps to improve the production efficiency and competitiveness of the enterprise.

[0066] The materials after batching and conveyed by the bucket elevator enter the unpowered grading screen for the first sorting, which improves the efficiency of the roller press, eliminates the influence of segregation in the bin on the stable operation of the roller press, and achieves the purpose of increasing the output.

[0067] The materials entering the V - separator enter the material dispersion device to improve their dispersion degree and exert the effect of the V - separator.

[0068] The coarse particles entering the intermediate bin and the materials discharged from the V - type separator enter the mixing device and are fully mixed before entering the intermediate bin.

[0069] A new type of multi - angle activation ring is added inside the mill to increase the residence time of the materials in the mill and achieve the purpose of ultra - fine grinding.

[0070] The height of the liners in different areas is increased to raise the different heights lifted by the grinding media, and they are mixed and ground with each other to increase the proportion of particles in the range of 3 - 32um.

[0071] According to the different grinding functions of different mills, the gap between the discharge grate plate and the partition plate of the mill is adjusted online.

[0072] Eliminate the phenomenon of over - grinding inside the mill.

[0073] Channels are added according to the activity of different materials, and online detection is carried out. The materials enter the separator for the second grading, eliminating the over - grinding phenomenon, ensuring that the material particles are uniform and round, and reducing the water demand of the finished cement.

[0074] The feeding and separation of the separator are reformed to improve the separation efficiency of particles in the range of 3 - 32um.

[0075] The particle optimization setting is increased, and pneumatic homogenization of the materials is carried out to ensure stable quality.

[0076] The intelligent control, detection, and batching functions are increased to achieve the purpose of high - efficiency and automatic adjustment.

[0077] Through the precise grading and high - efficiency grinding treatment of the materials in Mill A, the quality and performance of the finished cement can be significantly improved. High - activity and high - strength materials can better maintain their physical properties and exhibit more excellent performance characteristics during the grinding process. Due to the high - activity and high - strength characteristics of the materials in Mill A, they can be more effectively utilized and transformed during the grinding process. Therefore, the consumption of clinker can be reduced to a certain extent, thereby saving costs and reducing carbon emissions. The application of the materials in Mill A in the composite grading and grinding process helps to optimize the entire technological process, improve production efficiency and stability, and at the same time reduce energy consumption and production costs.

[0078] Due to the better grindability of the materials ground by Mill B, the required fineness can be achieved relatively quickly during the grinding process, thus reducing the energy consumption cost. Through the grinding and filling effect of the materials ground by Mill B, the particle size distribution and performance of the finished cement can be adjusted, which helps to meet the requirements of different projects for the cement performance and enhance the market competitiveness of the product. Grinding the materials with poor activity together with some clinker can make full use of these resources and improve the resource utilization rate, which helps to reduce the production cost and the generation of waste.

[0079] Non-powered classifier: Select a high-efficiency and energy-saving type. The screen mesh material should be wear-resistant and corrosion-resistant, and the screen mesh should be cleaned regularly to prevent blockage.

[0080] V-type separator: Adopt advanced cyclone separation technology to ensure the separation efficiency of fine powder. Regularly check the internal wear condition of the separator and replace the vulnerable parts in time.

[0081] Roll press: Select a hydraulically driven type with adjustable pressure and equipped with an automatic lubrication system to reduce the maintenance cost. The roll surface material should be wear-resistant, and the wear condition of the roll surface should be checked regularly.

[0082] Cement mill: Adopt an open-circuit or closed-circuit system, adjust the mill speed and the ratio of grinding media according to the production demand to ensure the grinding efficiency.

[0083] Mill B: Similar to Mill A, but attention should be paid to controlling the temperature of the dried materials to prevent overheating from affecting the material performance.

[0084] Ultra-fine grinding separator: Select a high-precision classification wheel to ensure the separation accuracy of fine powder. Regularly check the wear condition of the classification wheel.

[0085] Intelligent control system: Integrate PLC and DCS systems to achieve fully automated control. Regularly perform software upgrades and hardware maintenance on the control system.

[0086] In step S4, according to the material properties and production demand, dynamically adjust the size of the grate slot in the mill to obtain the optimal particle size distribution.

[0087] In step S6, by adjusting the speed of the ultra-fine grinding separator and the clearance of the classification wheel, accurately control the fineness and specific surface area of the finished materials.

[0088] Add an on-line particle size analyzer and a specific surface area measuring instrument to monitor the particle size distribution and specific surface area of the finished cement in real time to ensure the stable product quality. Establish a perfect quality traceability system, number and record each batch of products for tracking and querying.

[0089] Example 2:

[0090] Please refer to Figure 1 As shown, special cement has high performance requirements, such as high strength, low alkali, sulfate resistance, etc.

[0091] Special raw material preparation: Select special mineral raw materials that meet the performance requirements of special cement, such as blast furnace slag, fly ash, etc.

[0092] Classification and mixing: After mixing the special raw materials with an appropriate amount of clinker, conduct fine classification to ensure the uniform distribution of each component.

[0093] Enhanced grinding: Use a high-efficiency mill to conduct enhanced grinding on the mixed materials to improve the fineness and activity of the materials.

[0094] Performance adjustment: Add an appropriate amount of chemical activator or mineral admixture during the grinding process to adjust the performance indicators of the cement.

[0095] Fine classification and finished product preparation: Use an ultrafine grinding separator to conduct fine classification on the ground materials to ensure that the performance of the finished cement meets the standards.

[0096] Intelligent control and optimization: Through an intelligent control system, monitor the cement production process in real time, and automatically adjust and optimize the key parameters.

[0097] Fully utilize the high efficiency and flexibility of the compound classification grinding process. By adjusting the raw material ratio, grinding process, and the use of performance modifiers, successfully prepare special cement that meets special requirements.

[0098] Example 3:

[0099] Please refer to Figure 1 As shown, with the enhancement of environmental awareness, the cement industry has increasingly higher requirements for energy conservation and emissions reduction.

[0100] Green raw material selection: Prioritize the selection of industrial waste, municipal solid waste incineration ash, etc. as alternative raw materials to reduce the consumption of natural resources.

[0101] Low-temperature drying and preheating: Use a waste heat recovery system to conduct low-temperature drying and preheating on the raw materials to reduce energy consumption.

[0102] High-efficiency grinding and classification: Use a compound classification grinding process to conduct high-efficiency grinding and classification on the dried raw materials to improve the grinding efficiency and reduce the phenomenon of over-grinding.

[0103] Energy-saving equipment selection: Select low-energy-consuming and high-efficiency grinding equipment and separator equipment, such as high-efficiency energy-saving roller presses, vertical mills, etc.

[0104] Intelligent control system optimization: Through an intelligent control system, conduct real-time monitoring and optimization of the production process to ensure that the equipment operates in the best state.

[0105] Resource utilization of waste: Conduct resource utilization on the waste generated during the production process, such as using it as building materials or subgrade materials, etc.

[0106] By selecting green raw materials, adopting low-temperature drying and preheating technologies, high-efficiency grinding and classification processes, and energy-saving equipment selection, etc., the environmental protection and energy-saving goals of cement production have been achieved. At the same time, through the resource utilization of waste, the resource utilization rate and economic benefits have been further improved.

[0107] Example 4:

[0108] Please refer to Figures 3 to 6 As shown, a composite classification and grinding preparation mechanism includes:

[0109] Classification sleeve box 1;

[0110] One side of the top of the classification sleeve box 1 is fixedly connected with a feed pipe 2, one side of the inner wall of the classification sleeve box 1 is fixedly connected with a lapping frame 3, one side of the inner wall of the lapping frame 3 lapped with a buffer spring 4, the top of the buffer spring 4 lapped with a first screening plate 5, and one side of the first screening plate 5 is rotatably connected to the inner wall of the classification sleeve box 1, and the other side of the inner wall of the classification sleeve box 1 is rotatably connected to a second screening plate 6;

[0111] One side of the top of the classification sleeve box 1 is fixedly connected with a first discharge pipe 7, the bottom of the other side of the classification sleeve box 1 is fixedly connected with a second discharge pipe 8, the material enters the classification sleeve box 1 through the feed pipe 2, in the classification sleeve box 1, the material first encounters the first screening plate 5 and the second screening plate 6, these two screening plates conduct preliminary classification on the material through different pore sizes or screening mechanisms, the first screening plate 5 can buffer the material impact to a certain extent through the support and elastic action of the buffer spring 4, and at the same time uses its rotational connection to achieve more efficient screening, the classified materials are discharged through the first discharge pipe 7 and the second discharge pipe 8 respectively, the material discharged from the first discharge pipe 7 is coarse particles, the material discharged from the second discharge pipe is fine particles, the bottom end of the second discharge pipe 8 is fixedly connected with a V-shaped powder separator 9, the bottom of the inner wall of the V-shaped powder separator 9 is fixedly connected with a first driving motor 10, the output end of the first driving motor 10 is equipped with a driving rod 11, the top end of the driving rod 11 is fixedly connected with an arc-shaped cloth plate 12, one side of the top of the arc-shaped cloth plate 12 is fixedly connected with multiple groups of bumps 13, both sides of the bottom of the V-shaped powder separator 9 are provided with discharge slots 14, the discharge slots 14 and the bottom end of the first discharge pipe 7 are both fixedly connected with an intermediate bin 15, the material discharged from the second discharge pipe 8 enters the V-shaped powder separator 9, in the V-shaped powder separator 9, the staff connects the first driving motor 10 to the power supply, the first driving motor 10 drives the arc-shaped cloth plate 12 to rotate, the bumps 13 on the arc-shaped cloth plate 12 help the material to be evenly distributed, enhancing the powder selection effect, through the structural design and rotational cloth action of the V-shaped powder separator, the fine powder in the material is further separated and discharged through the discharge slots 14, and converges with the material directly discharged from the first discharge pipe 7 in the intermediate bin 15.

[0112] One side of the intermediate bin 15 is fixedly connected with a controller 16. One side of the back surface of the intermediate bin 15 is fixedly connected with a second driving motor 17. The output end of the second driving motor 17 is equipped with a transmission rod 18. The front end of the transmission rod 18 is fixedly connected with a connecting rod 19. One side of the surface of the connecting rod 19 is fixedly connected with multiple groups of first stirring rods 20. Both sides of the surface of the transmission rod 18 are fixedly connected with transmission wheels 21. One side of the surface of both transmission wheels 21 is rotatably connected with a transmission belt 22. One side of the inner wall of both transmission belts 22 is rotatably connected with a driving wheel 23. One side of the inner wall of the driving wheel 23 is rotatably connected with an adapter rod 24. The front end of the adapter rod 24 is fixedly connected with a fixed rod 25. One side of the surface of the fixed rod 25 is fixedly connected with multiple groups of second stirring rods 26. The materials in the intermediate bin 15 are mixed by controlling the start of the second driving motor 17 through the controller 16. The staff connects the second driving motor 17 to the power supply. The second driving motor 17 drives the transmission rod 18 to rotate, and then drives the first stirring rods 20 to stir through the connecting rod 19. At the same time, the transmission system composed of the transmission wheels 21, the transmission belts 22, the driving wheels 23 and the adapter rod 24 drives the fixed rod 25 and the second stirring rods 26 to rotate, realizing more sufficient mixing and stirring. One side of the bottom of the intermediate bin 15 is fixedly connected with a socket box 27. One side of the inner wall of the socket box 27 is inserted with a sealing plate 28, and one side of the surface of the sealing plate 28 is inserted into the inner bottom wall of the intermediate bin 15. The bottom of the intermediate bin 15 is fixedly connected with a mill 29. The bottom of the inner wall of the mill 29 is fixedly connected with an assembly box 30. One side of the inner wall of the assembly box 30 is fixedly connected with a servo motor 31. The output end of the servo motor 31 is equipped with a movable rod 32. The top end of the movable rod 32 is fixedly connected with a connecting sleeve 33. One side of the surface of the connecting sleeve 33 is fixedly connected with multiple groups of activation rings 34. One side of the inner wall of the mill 29 is fixedly connected with multiple groups of lining plates 35. One side of the bottom of the mill 29 is fixedly connected with a discharge pipe 36. The top end of the discharge pipe 36 is fixedly connected with a discharge grate plate 37. One side of the bottom of the discharge grate plate 37 is connected with a partition plate 38. The uniformly mixed materials enter the mill 29 through the gap between the socket box 27 and the sealing plate 28. Inside the mill 29, the staff connects the servo motor 31 to the power supply. The servo motor 31 drives the movable rod 32 to rotate. The connecting sleeve 33 and the activation rings 34 on the movable rod 32 rotate accordingly, and jointly grind the materials with the lining plates 35 on the inner wall of the mill. The ground materials are discharged through the discharge pipe 36 and the discharge grate plate 37. Among them, the partition plate 38 may be used to further separate or adjust the material flow rate.

[0113] By setting the first screening plate 5 and the second screening plate 6 in the grading sleeve box and using their different screening apertures, multi-stage grading of the materials is achieved. This multi-stage grading method is more refined than traditional single screening and can more effectively separate the materials according to particle size.

[0114] The first screening plate 5 is supported and rotationally connected by the buffer spring 4, which not only improves the screening efficiency, but also reduces the impact of materials on the screening plate and extends the service life of the equipment.

[0115] The use of the V-shaped powder separator, combined with the design of the arc-shaped cloth plate 12 and the bumps 13 thereon, innovatively improves the powder selection efficiency and uniformity. The arc-shaped cloth plate 12 evenly disperses the materials in the V-shaped powder separator through rotation, and the bumps 13 further promote the dispersion and separation of the materials, enabling the fine powder to be selected more effectively.

[0116] The intermediate bin 15 not only serves as a temporary storage and buffer space for materials, but also integrates a mixing and stirring function. Through the transmission system composed of the second driving motor 17, the transmission rod 18, the connecting rod 19, the first stirring rod 20, and the transmission wheels 21, the transmission belt 22, and the driving wheel 23, etc., the full mixing and stirring of the materials are realized. This design shows remarkable creativity in reducing material caking and improving mixing uniformity.

[0117] The activation grinding system inside the mill 29 includes components such as the movable rod 32 driven by the servo motor 31, the connecting sleeve 33, and the activation ring 34. The materials are efficiently ground through rotation and friction. The design of the activation ring 34 increases the grinding area and grinding efficiency, and at the same time, the cooperation with the lining plate 35 makes the grinding process more uniform and stable.

[0118] The entire mechanism forms a highly integrated system from feeding, grading, screening, mixing, grinding to discharging. Through ingenious design and connection between various components, the continuous and efficient processing of materials is realized. At the same time, through the control of components such as the second driving motor 17 by the controller 16, the automatic adjustment and optimization of the entire preparation process are achieved.

[0119] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the existing technology. The machinery, parts, and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0120] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0121] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0122] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0123] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0124] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0125] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite graded grinding and preparation mechanism, characterized in that: include: Grading kit (1); A feeding pipe (2) is fixedly connected to one side of the top of the grading box (1), a lap frame (3) is fixedly connected to one side of the inner wall of the grading box (1), a buffer spring (4) is overlapped on one side of the inner wall of the lap frame (3), a first screening plate (5) is overlapped on the top of the buffer spring (4), and one side of the first screening plate (5) is rotatably connected to the inner wall of the grading box (1), and the other side of the inner wall of the grading box (1) is rotatably connected to the second screening plate (6); A first discharge pipe (7) is fixedly connected to the top of one side of the grading box (1), a second discharge pipe (8) is fixedly connected to the bottom of the other side of the grading box (1), a V-shaped powder selector (9) is fixedly connected to the bottom end of the second discharge pipe (8), a first drive motor (10) is fixedly connected to the bottom of the inner wall of the V-shaped powder selector (9), a drive rod (11) is installed at the output end of the first drive motor (10), a curved material distribution plate (12) is fixedly connected to the top of the drive rod (11), a plurality of groups of convex points (13) are fixedly connected to one side of the top of the curved material distribution plate (12), discharge troughs (14) are provided on both sides of the bottom of the V-shaped powder selector (9), and an intermediate bin (15) is fixedly connected to the discharge trough (14) and the bottom end of the first discharge pipe (7); A controller (16) is fixedly connected to one side of the intermediate bin (15); a second drive motor (17) is fixedly connected to one side of the back side of the intermediate bin (15); a transmission rod (18) is installed at the output end of the second drive motor (17); a connecting rod (19) is fixedly connected to the front end of the transmission rod (18); a plurality of first stirring rods (20) are fixedly connected to one side of the surface of the connecting rod (19); transmission wheels (21) are fixedly connected to both sides of the surface of the transmission rod (18); a transmission belt (22) is rotatably connected to one side of the surface of the two transmission wheels (21); a driving wheel (23) is rotatably connected to one side of the inner wall of the two transmission belts (22); a connecting rod (24) is rotatably connected to one side of the inner wall of the driving wheel (23); a fixing rod (25) is fixedly connected to the front end of the connecting rod (24); a plurality of second stirring rods (26) are fixedly connected to one side of the surface of the fixing rod (25); a connecting rod (24) is fixedly connected to one side of the bottom of the intermediate bin (15); a connecting rod (25) is fixedly connected to one side of the bottom of the intermediate bin (15); a connecting rod (24) is fixedly connected to one side of the bottom of the intermediate bin (15); a connecting rod (25) is fixedly connected to one side of the surface of the fixing rod (25); a plurality of second stirring rods (26) are fixedly connected to one side of the bottom of the intermediate bin (15); a connecting rod (24) is fixedly connected to one side of the bottom of the intermediate bin (15); a connecting rod (25) is fixedly connected to one side of the surface of the fixing rod (25); a plurality of first stirring rods (20) are fixedly connected to one side of the surface of the connecting rod (19); a plurality of first stirring rods (20) are fixedly connected to one side of A socket box (27) is connected, a sealing plate (28) is inserted into one side of the inner wall of the socket box (27), and one side of the surface of the sealing plate (28) is inserted into the inner bottom wall of the intermediate bin (15), a grinder (29) is fixedly connected to the bottom of the inner wall of the grinder (29), an assembly box (30) is fixedly connected to the bottom of the inner wall of the grinder (29), a servo motor (31) is fixedly connected to one side of the inner wall of the assembly box (30), and a movable rod (31) is installed at the output end of the servo motor (31) 2), the top end of the movable rod (32) is fixedly connected to a connecting sleeve (33), one side of the surface of the connecting sleeve (33) is fixedly connected to multiple groups of activation rings (34), one side of the inner wall of the mill (29) is fixedly connected to multiple groups of lining plates (35), one side of the bottom of the mill (29) is fixedly connected to a discharge pipe (36), the top end of the discharge pipe (36) is fixedly connected to a grinding grate plate (37), and one side of the bottom of the grinding grate plate (37) is connected to a partition plate (38).

2. A composite graded grinding process, applicable to the composite graded grinding preparation mechanism according to claim 1, characterized in that: The following steps are involved: S1, initial classification and mixing of A-mill materials; S2, V-type powder separator for fine screening; S3, material mixing and roller pressing in the middle bin; S4, grinding and classification of cement mill; S5, grinding and reclassification of B mill; S6, ultrafine grinding powder selection and particle optimization; S7, intelligent control and online adjustment.

3. A composite graded grinding process according to claim 2, characterized in that: In step S1, the clinker dominated by A mill and other materials with higher activity are mixed in a certain proportion and transported to the unpowered grading screen by a bucket elevator. The materials are classified for the first time on the unpowered grading screen. The coarse particles enter the mixing device in the intermediate bin for mixing to prevent segregation in the bin, and the fine particles enter the distributor of the V-type powder classifier.

4. A composite graded grinding process according to claim 2, characterized in that: In step S2, the fine particles entering the V-type powder classifier distributor are evenly scattered in the powder classifier through a large-angle distributor for sufficient screening. The particles close to the finished product undergo a second classification under the suction of the circulating fan, enter the dust collector and are collected through the finished product chute.

5. A composite graded grinding process according to claim 2, characterized in that: In step S3, the coarse particles discharged from the V-type powder selector and the coarse particles screened by the unpowered grading screen enter the mixing device in the intermediate bin for sufficient mixing to ensure that the materials fall evenly and generate constant pressure. The mixed materials enter the roller press for roller pressing to reduce the particle size of the materials in preparation for subsequent grinding.

6. A composite graded grinding process according to claim 2, characterized in that: In step S4, the material processed by the roller press enters the cement mill for efficient grinding. By adjusting the size of the grate gap in the mill, dynamic adjustment is achieved to ensure that qualified 3-32μm particles are taken away by the wind in time.

7. A composite graded grinding process according to claim 2, characterized in that: In step S5, the material with poor grinding activity is mixed with part of the clinker ingredients and then enters the B mill for grinding. After passing through the B mill classifier, the material with poor activity but good grindability is preferentially selected and enters the finished cement, and the remaining clinker particles enter the A mill classifier for the third classification grinding.

8. A composite graded grinding process according to claim 2, characterized in that: In step S6, the ground materials from mill A enter the modified ultrafine mill concentrator for repeated screening to ensure that the 3-32μm materials that meet the standards enter the finished product chute. The finished materials from mills A and B and fly ash with coarse particles but large specific surface area enter the particle optimizer together for quality mixing. After being tested and qualified by the online particle analyzer, they are sent to the cement silo by the bucket elevator.

9. A composite graded grinding process according to claim 2, characterized in that: In step S7, the intelligent control system monitors the material particle grading status in real time, and automatically adjusts the primary, secondary, tertiary grading and grinding process according to the detection results, and at the same time, performs online adjustments according to the batching plan.

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