Composite graded grinding process and preparation mechanism

Abstract

The invention relates to the technical field of cement manufacturing, and particularly discloses a composite grading grinding process and a preparation mechanism, and the composite grading grinding process comprises the following steps: S1, primary grading and mixing of A grinding materials; s2, fine screening of a V-shaped powder concentrator; s3, mixing and rolling materials in the middle bin; s4, grinding and grading of a cement grinding mill; s5, grinding and re-grading of the B mill; s6, superfine grinding powder selection and particle optimization; s7, intelligent control and online adjustment are carried out; according to the invention, through multiple grading and grinding, material uniformity is ensured, and uniformity of cement particle gradation is improved, so that cement quality is improved, through accurate grading and grinding, excessive grinding and insufficient grinding of the material are avoided, energy consumption and waste are reduced, a material with poor activity and good grindability is used as a filling material, the use amount of a high-activity material is saved, and the production cost is reduced. An efficient grinding process and an intelligent control system reduce unnecessary energy consumption, carbon emission is reduced, and the environmental influence of cement production is reduced through selection of green raw materials and resource utilization of waste.

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 powder selector distributor are evenly scattered in the powder selector through a large-angle distributor, and are fully screened, and the particles close to the finished product (with a specific surface area greater than 400m 2 / g) undergoes a second classification under the suction of a circulating fan, enters a dust collector and is collected through a finished product chute (the flow rate is adjusted by a valve).

[0016] Preferably, in step S3, the coarse particles discharged from the V-type powder selector and the coarse particles screened out by the unpowered grading screen enter the mixing device of the intermediate bin together for sufficient mixing to ensure that the materials fall evenly and generate a 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.

[0017] Preferably, in step S4, the material processed by the roller press enters the cement mill for efficient grinding, and dynamic adjustment is achieved by adjusting the size of the grate gap in the mill to ensure that qualified 3-32 μm particles are taken away by the wind in time, avoiding particle grading mismatch and over-grinding.

[0018] Preferably, in step S5, the material with poor grinding activity is mixed with part of the clinker (dried using the clinker temperature) 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 to serve as a filling; the remaining clinker particles enter the classifier of the A mill for the third grade grinding.

[0019] Preferably, in step S6, the ground material from cement mill A enters the modified ultrafine mill powder selector for repeated screening to ensure that the 3-32 μm material that meets the standard enters the finished product chute, and 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, and after being tested and qualified by the online particle analyzer, they are sent to the cement storage by the bucket elevator.

[0020] Preferably, 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.

[0021] A composite graded grinding preparation mechanism, comprising:

[0022] Graded boxes;

[0023] A feeding pipe is fixedly connected to one side of the top of the grading box, a lap frame is fixedly connected to one side of the inner wall of the grading box, a buffer spring is overlapped on one side of the inner wall of the lap frame, a first screening plate is overlapped on the top of the buffer spring, and one side of the first screening plate is rotatably connected to the inner wall of the grading box, and the other side of the inner wall of the grading box is rotatably connected to the second screening plate;

[0024] A first discharge pipe is fixedly connected to the top of one side of the grading box, a second discharge pipe is fixedly connected to the bottom of the other side of the grading box, a V-shaped powder classifier is fixedly connected to the bottom end of the second discharge pipe, a first drive motor is fixedly connected to the bottom of the inner wall of the V-shaped powder classifier, a drive rod is installed at the output end of the first drive motor, a curved distribution plate is fixedly connected to the top of the drive rod, a plurality of groups of protrusions are fixedly connected to one side of the top of the curved distribution plate, discharge troughs are provided on both sides of the bottom of the V-shaped powder classifier, and an intermediate bin is fixedly connected to the discharge trough and the bottom end of the first discharge pipe.

[0025] Preferably, one side of the intermediate bin is fixedly connected to a controller, one side of the back side of the intermediate bin is fixedly connected to a second driving motor, a transmission rod is installed at the output end of the second driving motor, the front end of the transmission rod is fixedly connected to a connecting rod, one side of the surface of the connecting rod is fixedly connected to multiple groups of first stirring rods, both sides of the surface of the transmission rod are fixedly connected to transmission wheels, one side of the surfaces of the two transmission wheels are rotatably connected to transmission belts, one side of the inner walls of the two transmission belts are rotatably connected to driving wheels, one side of the inner walls of the driving wheels is rotatably connected to a connecting rod, the front end of the connecting rod is fixedly connected to a fixing rod, one side of the surface of the fixing rod is fixedly connected to multiple groups of second stirring rods, the bottom of the intermediate bin One side of the intermediate bin is fixedly connected with a socket box, one side of the inner wall of the socket box is plugged with a sealing plate, and one side of the surface of the sealing plate is plugged into the inner bottom wall of the intermediate bin, the bottom of the intermediate bin is fixedly connected with a grinder, the bottom of the inner wall of the grinder is fixedly connected with an assembly box, one side of the inner wall of the assembly box is fixedly connected with a servo motor, an output end of the servo motor is installed with a movable rod, the top 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, one side of the inner wall of the grinder is fixedly connected with multiple groups of lining plates, one side of the bottom of the grinder is fixedly connected with a discharge pipe, the top of the discharge pipe is fixedly connected with a grinding grate plate, and one side of the bottom of the grinding grate plate is connected with a partition plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

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

[0028] (2) The efficient grinding process reduces the excessive consumption of highly active materials and uses materials with low activity but good grindability as fillers, saving the amount of highly active materials. The intelligent control system can monitor and adjust the production process in real time, reduce unnecessary energy consumption, and improve energy efficiency.

[0029] (3) The selection of green raw materials and the resource utilization of waste significantly reduce carbon emissions and environmental impacts in the cement production process. The use of low-energy consumption and high-efficiency grinding equipment and powder selection equipment further reduces energy consumption and carbon emissions.

[0030] (4) The intelligent control system realizes the automation of the production process, reduces manual intervention, improves production efficiency and stability, and integrates high-precision online monitoring equipment, which can monitor the particle grading 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 condition.

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

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

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

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

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

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

[0037] Figure 6 It is a plan view of the partition board of the present invention;

[0038] In the figure: 1, grading sleeve; 2, feed pipe; 3, lap frame; 4, buffer spring; 5, first screening plate; 6, second screening plate; 7, first discharge pipe; 8, second discharge pipe; 9, V-shaped powder selector; 10, first drive motor; 11, drive rod; 12, arc-shaped distribution plate; 13, convex point; 14, discharge trough; 15, intermediate bin; 16, controller; 17, second drive 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, sleeve box; 28, sealing plate; 29, grinding machine; 30, assembly box; 31, servo motor; 32, movable rod; 33, connecting sleeve; 34, activation ring; 35, lining plate; 36, discharge pipe; 37, grinding grate plate; 38, partition plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] See also Figure 1 to Figure 2 As shown, a composite graded grinding process comprises the following steps:

[0042] S1, initial classification and mixing of A-mill materials;

[0043] S2, V-type powder separator for fine screening;

[0044] S3, material mixing and roller pressing in the middle bin;

[0045] S4, grinding and classification of cement mill;

[0046] S5, grinding and reclassification of B mill;

[0047] S6, ultrafine grinding powder selection and particle optimization;

[0048] S7, intelligent control and online adjustment.

[0049] 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.

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

[0051] 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 of the intermediate bin for sufficient mixing to ensure that the materials fall evenly and generate constant pressure to avoid the impact of bin pressure fluctuations on the subsequent roller press. The mixed materials enter the roller press for roller pressing to reduce the particle size of the materials in preparation for subsequent grinding.

[0052] 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, avoiding particle grading mismatch and over-grinding.

[0053] In step S5, the material with poor grinding activity is mixed with part of the clinker (dried using the clinker temperature) 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 to serve as a filling; the remaining clinker particles enter the A mill classifier for the third grade grinding.

[0054] In step S6, the ground materials from cement 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 storage by the bucket elevator.

[0055] 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.

[0056] By integrating high-precision online monitoring equipment (such as laser particle size analyzers), intelligent control systems can monitor the particle grading of materials during the production process in real time and accurately. These devices use advanced technologies such as laser diffraction and image recognition to quickly and continuously measure the particle size distribution of material particles 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 grading data, the intelligent control system can automatically analyze and determine whether the classification effects at each level meet expectations. If there are deviations, the system will automatically adjust the classifier's speed, screen aperture and other parameters according to preset algorithms and rules to optimize the classification effect and ensure that the particle size distribution of materials at each level meets 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 grading process and improve grading accuracy and stability.

[0059] Grinding parameter adjustment: During the grinding process, the intelligent control system will automatically adjust the key parameters of the grinding mill, such as rotation speed, feed rate, grinding medium ratio, etc. according to the changes in particle grading data. By precisely controlling these parameters, the system can optimize grinding efficiency, improve product quality, and reduce energy consumption and costs.

[0060] Optimize grinding strategy: The system will also intelligently select and optimize the grinding strategy based on material characteristics and production requirements. For example, when it is necessary to produce products with higher fineness, the system will automatically adjust to a finer grinding mode; and when it is necessary to increase production, the system will optimize the grinding parameters to improve production efficiency.

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

[0062] Batching scheme input: Before the system is operated, the operator will input the preset batching scheme into the control system. These schemes usually include key information such as the ratio of each material and the order of adding materials.

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

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

[0065] Through the application of intelligent control systems, enterprises can achieve real-time monitoring and automatic adjustment of material particle grading, significantly improving the intelligence level and automation degree of the production process. This can not only reduce the frequency and difficulty of manual intervention, reduce errors and waste caused by human factors; it can also improve product quality and stability, reduce production costs and energy consumption; at the same time, it will also help to improve the production efficiency and competitiveness of the enterprise.

[0066] After batching, the materials lifted by the bucket enter the unpowered grading screen for the first sorting, which improves the efficiency of the roller press and prevents the segregation phenomenon in the bin from affecting the stable operation of the roller press, thus achieving the purpose of increasing production;

[0067] For materials entering V-selection, they enter the material dispersion device to improve their dispersion and give full play to the V-selection effect;

[0068] The coarse particles entering the intermediate bin and the materials discharged from the V-type powder selector are fully mixed by the mixing device and enter the intermediate bin;

[0069] Add a new multi-angle activation ring inside the mill to increase the residence time of materials in the mill to achieve the purpose of ultra-fine grinding;

[0070] Increase the height of the liner in different areas, raise the grinding body to different heights, perform mixed grinding, and increase the proportion of 3-32um;

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

[0072] Eliminate over-grinding in the mill;

[0073] According to the activity of different materials, channels are added, and online detection is carried out to enter the powder classifier for secondary classification to eliminate over-grinding, ensure that the material particles are uniform and round, and reduce the water demand of finished cement;

[0074] Improve the powder spreading and powder selection of the powder selection machine to improve the powder selection efficiency of 3-32um particles;

[0075] Add particle optimization settings and pneumatically homogenize the material to ensure stable quality;

[0076] Add intelligent control, detection and batching functions to achieve high efficiency and automatic adjustment.

[0077] The quality and performance of finished cement can be significantly improved through precise classification and efficient grinding of A-mill materials. 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 A-mill materials, they can be more effectively utilized and converted during the grinding process, thus reducing the amount of clinker to a certain extent, thereby saving costs and reducing carbon emissions. The application of A-mill materials in the composite classification grinding process helps to optimize the entire process, improve production efficiency and stability, and reduce energy consumption and production costs.

[0078] Since the B-mill material has good grindability, it can reach the required fineness relatively quickly during the grinding process, thereby reducing energy consumption costs. The particle size distribution and performance of the finished cement can be adjusted through the grinding and filling effects of the B-mill material, which helps to meet the requirements of different projects for cement performance and enhance the market competitiveness of the product. Grinding materials with poor activity together with part of the clinker can make full use of these resources and improve resource utilization, which helps to reduce production costs and reduce waste generation.

[0079] Unpowered grading screen: Choose an energy-efficient type. The screen material should be wear-resistant and corrosion-resistant. Clean the screen regularly to prevent clogging.

[0080] V-type powder classifier: adopts advanced cyclone separation technology to ensure the separation efficiency of fine powder, regularly check the internal wear of the powder classifier and replace the wearing parts in time.

[0081] Roller press: hydraulic drive, adjustable pressure, equipped with automatic lubrication system to reduce maintenance costs. The roller surface material must be wear-resistant, and the roller surface wear must be checked regularly.

[0082] Cement mill: adopt open flow or circle flow system, adjust the mill speed and grinding body ratio according to production needs to ensure grinding efficiency.

[0083] B mill: Similar to A mill, but attention should be paid to the temperature control of the drying material to prevent overheating from affecting the material performance.

[0084] Ultrafine grinding powder classifier: Use high-precision classifying wheel to ensure the fine powder separation accuracy, and regularly check the classifying wheel wear.

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

[0086] In step S4, the grate size in the mill is dynamically adjusted according to the material properties and production requirements to obtain the best particle size distribution.

[0087] In step S6, the fineness and specific surface area of ​​the finished material are precisely controlled by adjusting the rotation speed of the ultrafine grinding mill and the gap between the classifying wheels.

[0088] Add online particle size analyzers and specific surface area meters to monitor the particle size distribution and specific surface area of ​​finished cement in real time to ensure stable product quality. Establish a complete quality traceability system and number and record each batch of products for tracking and inquiry.

[0089] Embodiment 2:

[0090] See also Figure 1 As shown, special cement has higher performance requirements, such as high strength, low alkali, and sulfate resistance.

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

[0092] Grading and mixing: After mixing the special raw materials with the appropriate amount of clinker, fine grading is carried out to ensure uniform distribution of the components.

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

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

[0095] Fine classification and finished product preparation: Use ultra-fine grinding powder classifier to finely classify the ground materials to ensure that the performance of the finished cement meets the standards.

[0096] Intelligent control and optimization: The cement production process is monitored in real time through an intelligent control system, and key parameters are automatically adjusted and optimized.

[0097] By making full use of the high efficiency and flexibility of the composite graded grinding process, special cement that meets special requirements was successfully prepared by adjusting the raw material ratio, grinding process and the use of performance adjusters.

[0098] Embodiment three:

[0099] See also Figure 1 As shown, with the enhancement of environmental awareness, the cement industry has an increasing demand for energy conservation and emission reduction.

[0100] Green raw material selection: give priority to industrial waste, urban garbage incineration ash, etc. as alternative raw materials to reduce the consumption of natural resources.

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

[0102] Efficient grinding and classification: The composite classification grinding process is used to efficiently grind and classify the dried raw materials, improve the grinding efficiency and reduce over-grinding.

[0103] Selection of energy-saving equipment: Choose low-energy consumption, high-efficiency grinding equipment and powder selection equipment, such as high-efficiency energy-saving roller press, vertical mill, etc.

[0104] Intelligent control system optimization: The production process is monitored and optimized in real time through the intelligent control system to ensure that the equipment operates in the best condition.

[0105] Waste resource utilization: The waste generated in the production process is utilized as resources, such as as building materials or roadbed materials.

[0106] The environmental protection and energy saving goals of cement production have been achieved through the selection of green raw materials, the use of low-temperature drying and preheating technology, efficient grinding and classification processes, and the selection of energy-saving equipment. At the same time, through the resource utilization of waste, the resource utilization rate and economic benefits have been further improved.

[0107] Embodiment 4:

[0108] See also Figures 3 to 6 As shown, a composite graded grinding and preparation mechanism comprises:

[0109] Grading set 1;

[0110] 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;

[0111] A first discharge pipe 7 is fixedly connected to the top of one side of the grading box 1, and a second discharge pipe 8 is fixedly connected to the bottom of the other side of the grading box 1. The material enters the grading box 1 through the feed pipe 2. In the grading box 1, the material first encounters the first screening plate 5 and the second screening plate 6. The two screening plates perform preliminary grading on the material through different apertures or screening mechanisms. The first screening plate 5 can buffer the impact of the material to a certain extent through the support and elastic action of the buffer spring 4, and at the same time, its rotating connection is used to achieve more efficient screening. The graded materials are discharged through the first discharge pipe 7 and the second discharge pipe 8 respectively, wherein the materials discharged from the first discharge pipe 7 are coarse particles, and the materials discharged from the second discharge pipe are fine particles. The bottom end of the second discharge pipe 8 is fixedly connected to a V-shaped powder selector 9, and the bottom of the inner wall of the V-shaped powder selector 9 is fixedly connected to a first drive motor 10. A driving rod 11 is installed at the output end of a driving motor 10, and an arc-shaped distribution plate 12 is fixedly connected to the top of the driving rod 11, and a plurality of groups of convex points 13 are fixedly connected to one side of the top of the arc-shaped distribution plate 12. Discharge troughs 14 are provided on both sides of the bottom of the V-shaped powder classifier 9, and the discharge trough 14 and the bottom end of the first discharge pipe 7 are fixedly connected with an intermediate bin 15. The material discharged from the second discharge pipe 8 enters the V-shaped powder classifier 9. In the V-shaped powder classifier 9, the staff connects the first driving motor 10 to the power supply, and the first driving motor 10 drives the arc-shaped distribution plate 12 to rotate. The convex points 13 on the arc-shaped distribution plate 12 help to evenly distribute the material and enhance the powder selection effect. Through the structural design of the V-shaped powder classifier and the rotating distribution action, the fine powder in the material is further separated and discharged through the discharge trough 14, and merges with the material directly discharged from the first discharge pipe 7 in the intermediate bin 15.

[0112] 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 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, and a front end of the connecting rod 24 is fixedly connected to the front end of the connecting rod 24. The end is fixedly connected with a fixed rod 25, and 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 drive motor 17 through the controller 16. The staff connects the second drive motor 17 to the power supply, and the second drive motor 17 drives the transmission rod 18 to rotate, and then drives the first stirring rod 20 to stir through the connecting rod 19. At the same time, the transmission system composed of the transmission wheel 21, the transmission belt 22, the driving wheel 23 and the connecting rod 24 drives the fixed rod 25 and the second stirring rod 26 to rotate, so as to achieve more sufficient mixing and stirring. One side of the bottom of the intermediate bin 15 is fixedly connected to A socket box 27 is connected, a sealing plate 28 is inserted on 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 mill 29 is fixedly connected to the bottom of the inner wall of the mill 29, an assembly box 30 is fixedly connected to the bottom of the inner wall of the mill 29, a servo motor 31 is fixedly connected to one side of the inner wall of the assembly box 30, a movable rod 32 is installed at the output end of the servo motor 31, a connecting sleeve 33 is fixedly connected to the top of the movable rod 32, a plurality of activation rings 34 are fixedly connected to one side of the surface of the connecting sleeve 33, a plurality of lining plates 35 are fixedly connected to one side of the inner wall of the mill 29, and a servo motor 31 is fixedly connected to one side of the bottom of the mill 29. A discharge pipe 36 is connected, and a grinding grate plate 37 is fixedly connected to the top of the discharge pipe 36. A partition plate 38 is connected to one side of the bottom of the grinding grate plate 37. The evenly mixed material enters 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, and the servo motor 31 drives the movable rod 32 to rotate. The connecting sleeve 33 and the activation ring 34 on the movable rod 32 rotate accordingly, and grind the material together with the lining plate 35 on the inner wall of the mill. The ground material is discharged through the discharge pipe 36 and the grinding grate plate 37, and the partition plate 38 may be used to further separate or adjust the material flow.

[0113] By arranging the first screening plate 5 and the second screening plate 6 in the grading box and utilizing their different screening apertures, multi-level grading of the material is achieved. This multi-level grading method is more sophisticated than the traditional single screening and can more effectively separate the material according to particle size.

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

[0115] The use of the V-shaped powder classifier, combined with the design of the arc-shaped distribution plate 12 and the convex points 13 thereon, innovatively improves the powder selection efficiency and uniformity. The arc-shaped distribution plate 12 evenly disperses the material in the V-shaped powder classifier by rotation, and the convex points 13 further promote the dispersion and separation of the material, so that fine powder can 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 drive motor 17, the transmission rod 18, the connecting rod 19, the first stirring rod 20, and the transmission wheel 21, the transmission belt 22, the driving wheel 23, etc., the materials are fully mixed and stirred. This design shows significant creativity in reducing material agglomeration and improving mixing uniformity.

[0117] The activated grinding system inside the mill 29 includes a movable rod 32 driven by a servo motor 31, a connecting sleeve 33, an activation ring 34 and other components. The materials are efficiently ground through rotation and friction. The design of the activation ring 34 increases the grinding area and grinding efficiency. At the same time, the cooperation with the liner 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 the clever design and connection between the various components, continuous and efficient processing of materials is achieved. At the same time, through the control of the second drive motor 17 and other components by the controller 16, 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, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0120] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0121] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, 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 specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0123] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0124] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of 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 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 composite graded grinding process, 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.

2. A composite graded grinding process according to claim 1, 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.

3. A composite graded grinding process according to claim 1, characterized in that: In step S2, the fine particles entering the V-type powder selector distributor are evenly scattered in the powder selector through the large-angle distributor and fully screened, and the particles close to the finished product (specific surface area greater than 400m 2 / g) undergoes a second classification under the suction of a circulating fan, enters a dust collector and is collected through a finished product chute (the flow rate is adjusted by a valve).

4. A composite graded grinding process according to claim 1, 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.

5. The composite graded grinding process according to claim 1, 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.

6. A composite graded grinding process according to claim 1, characterized in that: In step S5, the material with poor grinding activity is mixed with part of the clinker (dried using the clinker temperature) 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 grade grinding.

7. A composite graded grinding process according to claim 1, characterized in that: In step S6, the ground materials from cement 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 storage by the bucket elevator.

8. The composite graded grinding process according to claim 1, 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.

9. A composite graded grinding preparation mechanism, suitable for a composite graded grinding process according to claims 1 to 8, 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 protrusions (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).

10. A composite graded grinding and preparation mechanism according to claim 9, characterized in that: 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).

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