Ultrafine powder processing apparatus for gypsum grinding modification
By integrating a vertical grinding box and a modification box into an ultrafine powder processing equipment, the problems of clogging, uneven grinding, powder agglomeration, dust overflow during conveying, and uneven modification in gypsum powder production have been solved, achieving a highly efficient and stable powder processing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANQIU HUAXING MASCH CO LTD
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-24
AI Technical Summary
Existing gypsum ultrafine powder production processes suffer from problems such as easy agglomeration and blockage of feed, uneven grinding fineness, easy powder agglomeration, dust overflow during material conveying, uneven modification, and low equipment integration, making it difficult to meet the needs of continuous production and flexible control.
The integrated structure of vertical grinding box and modification box, combined with mixing structure, multi-layer shear air field, negative pressure conveying, atomization modification and constant temperature control, achieves raw material anti-blocking, uniform grinding, sufficient dispersion, closed conveying, uniform modification and equipment stability.
It enables continuous production of gypsum powder, with high uniformity of grinding particle size, stable modification effect, reduced dust overflow, stable equipment operation, small footprint, and is suitable for large-scale assembly line operation in factories.
Smart Images
Figure CN122230845B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of powder grinding equipment technology, and more specifically to ultrafine powder processing equipment for gypsum grinding and modification. Background Technology
[0002] As a widely used industrial basic powder raw material, gypsum often requires ultrafine grinding and surface modification treatment when used in building materials, chemical industry, new materials and other fields to improve powder fineness, dispersibility and application adaptability.
[0003] However, the industrial production of ultrafine gypsum powder currently faces the following technical bottlenecks: 1. Raw material agglomeration and feed blockage: After storage or initial crushing, gypsum raw materials are highly susceptible to forming lumps or agglomerates of varying sizes due to moisture absorption or static electricity. Traditional equipment lacks an active dispersing device at the feed inlet, and the agglomerated material often blocks the feed channel, causing production interruptions and requiring frequent manual cleaning, making it difficult to meet the needs of continuous, large-scale production.
[0004] 2. Uneven particle size and low refining efficiency: When conventional ball mills, roller presses, and other equipment perform ultrafine grinding of gypsum, the interaction between the grinding media (such as steel balls and rollers) and the material is singular, lacking auxiliary shearing and dispersion mechanisms. This results in some powder particles being repeatedly crushed and over-refined in the grinding chamber, while others are not sufficiently ground, leading to a wide particle size distribution and an unstable proportion of ultrafine powder in the finished product, affecting subsequent modification effects and product quality.
[0005] 3. Secondary agglomeration of powder after grinding, resulting in poor dispersibility: Due to their high surface energy, ultrafine powders are prone to spontaneous agglomeration after grinding and before entering the modification process, forming soft agglomerates. Traditional equipment lacks effective in-situ dispersion methods. After the agglomerates enter the modification chamber, the surface of the internal particles cannot contact the modifier, causing problems such as incomplete modification coating and localized excessive modifier, which seriously reduces the uniformity of modification and product performance.
[0006] 4. Difficulty in controlling the grinding process as needed: Different applications require different fineness of gypsum powder (e.g., filler grade, coating grade, functional filler grade), but most existing equipment cannot flexibly control the residence time of materials in the grinding zone or the on / off state of grinding. When producing products of different specifications, it is often necessary to replace parts or adjust the parameters of the whole machine, which is cumbersome, slow to respond, and not conducive to flexible production.
[0007] 5. Dust spillage and loss during material transfer: When transferring ultrafine gypsum powder from the grinding process to the modification process, pneumatic conveying or mechanical lifting is often used. Traditional conveying systems have insufficient sealing, which easily leads to dust leakage at interfaces, bends, etc. This not only pollutes the workshop environment and endangers the health of operators, but also causes valuable ultrafine powder to be lost, increasing production costs.
[0008] 6. Uneven mixing and temperature runaway during modification: Existing modification equipment often uses simple stirring or spraying methods to add modifiers, resulting in large droplet sizes and uneven distribution. This easily leads to excessively high concentrations in some areas, while other areas of the powder remain unmodified. Furthermore, gypsum surface modification reactions (such as coupling agent coating and fatty acid salification) are typically temperature-sensitive. Equipment lacking precise temperature control chambers cannot guarantee complete and stable reactions, resulting in significant batch-to-batch variations in modification effects.
[0009] 7. Low equipment integration and poor operational stability: Traditional "grinding and modification" production lines are usually composed of multiple independent devices connected in series through pipelines and elevators, which occupy a large area, have many intermediate links, and have scattered failure points. When the equipment is running at high speed, the foundation installation is unstable, which easily generates vibration and noise, resulting in high maintenance costs and making it difficult to meet the needs of modern factories for compact, efficient, and low-noise assembly line operations.
[0010] In conclusion, the existing technology clearly has inconveniences and defects in practical use, and it is necessary to improve it. Summary of the Invention
[0011] To address the shortcomings of existing technologies, this invention provides an ultrafine powder processing device for gypsum grinding and modification. This device solves the problems that existing gypsum grinding and modification equipment suffers from during use, such as easy agglomeration and blockage of feed material, insufficient grinding fineness, easy powder agglomeration and uneven particle size; lack of air-powered dispersion structure, making it impossible to control the grinding process; material conveying dust leakage and easy material accumulation; uneven addition of modifier, insufficient mixing and lack of constant temperature conditions, unstable operation of the whole machine, and large footprint due to dispersed processes.
[0012] To achieve the above objectives, the present invention provides the following technical solution: An ultrafine powder processing device for gypsum grinding and modification includes a mounting base, on which a vertical grinding box and a modification box are respectively provided. The vertical grinding box and the modification box are connected by a material transfer pipe. The vertical grinding box is equipped with an ultrafine grinding component, and the modification box is equipped with an eddy current modification component.
[0013] As an optimized solution, the vertical grinding box is a cylindrical box with an open top and a closed bottom, and the outer peripheral wall of the vertical grinding box near the lower end forms an outward annular boss.
[0014] As an optimized solution, a rotary drive motor is fixed at the center of the outer bottom surface of the vertical grinding box. The output shaft of the rotary drive motor passes through the vertical grinding box and is fixed with a roller grinding air cutter seat. The roller grinding air cutter seat is a hollow cylindrical seat. Three centrally symmetrical limiting installation ports are opened on the outer peripheral wall of the roller grinding air cutter seat. A grinding inner roller is rotatably installed in each of the limiting installation ports.
[0015] As an optimized solution, the outer peripheral wall of the roller mill air shearing seat is provided with three sets of vertical shearing units. Each set of vertical shearing units includes three vertical air cuts arranged at equal intervals in the circumferential direction, and each set of vertical shearing units is located between two adjacent limiting installation ports.
[0016] As an optimized solution, the outer peripheral wall of the roller mill air shearing seat is also provided with six sets of horizontal shearing units. Each set of horizontal shearing units includes eleven horizontal air cuts arranged axially at equal intervals. Two adjacent sets of horizontal shearing units are respectively located on both sides of the vertical shearing unit and between the two limiting installation ports.
[0017] As an optimized solution, a roller grinding outer ring is rotatably mounted inside the annular boss seat. The roller grinding outer ring is positioned directly opposite the roller grinding air cutting seat, and a grinding gap is reserved between them. The inner circumferential wall of the roller grinding outer ring abuts against the outer circumferential walls of the three inner grinding rollers.
[0018] As an optimized solution, the outer bottom surface of the roller mill air cutter seat has six centrally symmetrical air inlets.
[0019] As an optimized solution, the mounting base is a horizontally positioned and grounded elliptical base.
[0020] As an optimized solution, a bottom support frame is fixed to one side of the upper surface of the mounting base, and the lower end of the vertical grinding box is fixed to the upper surface of the bottom support frame.
[0021] As an optimized solution, the modified box is a closed vertical cylindrical box, and two longitudinally symmetrical side support frames are fixed on the other side of the upper surface of the mounting base, and the modified box is fixedly clamped on the two side support frames.
[0022] As an optimized solution, a stepper motor is fixed in the middle of the upper surface of the modification box, and the output shaft end of the stepper motor passes downward through the upper wall of the modification box and is fixed with a modification turbine.
[0023] As an optimized solution, a longitudinally extending heating plate is fixed to the lower surface of the modification box, and the temperature inside the modification box can be adjusted by heating the heating plate.
[0024] As an optimized solution, an annular atomizing splitter is fixed on the inner top surface of the modified box. The atomizing splitter is located above the modified turbine, and several centrally symmetrical atomizing nozzles are fixed on the lower surface of the atomizing splitter.
[0025] As an optimized solution, an annular flow divider is fixed in the middle of the upper surface of the modification box, and the annular flow divider is connected to the atomizing flow divider. A modifier feeding box is fixed on one side of the upper surface of the modification box, and a feeding pipe is connected to the outer wall of the modifier feeding box. A metering pump is provided at the upper end of the modifier feeding box.
[0026] As an optimized solution, a clamping ring seat is fixed in the middle of the lower surface of the roller mill air cutter seat, a vertical air inlet is fixed in the middle of the inner bottom surface of the vertical grinding box, the upper end of the vertical air inlet is rotatably clamped in the clamping ring seat, a spiral guide ring plate is fixed on the inner peripheral wall of the vertical air inlet, and six air inlets are located on the inner side of the clamping ring seat.
[0027] As an optimized solution, a grinding air inlet pipe is fixed on the outer peripheral wall of the vertical air inlet duct and communicates with it. The grinding air inlet pipe is a square pipe with a closed end. The closed end of the grinding air inlet pipe passes through the side wall of the vertical grinding box and extends to its outer side. A compressed air pump is fixed on the lower surface of the grinding air inlet pipe near the closed end.
[0028] As an optimized solution, three centrally symmetrical hydraulic telescopic cylinders are fixed on the inner bottom surface of the vertical grinding box. A horizontal isolation plate is fixed to the upper telescopic end of the three hydraulic telescopic cylinders. The horizontal isolation plate is an annular plate. The outer peripheral wall of the horizontal isolation plate is closely attached to the inner peripheral wall of the vertical grinding box. The horizontal isolation plate is located below the roller mill air cutting seat and above the grinding air inlet pipe.
[0029] As an optimized solution, a purge air inlet pipe is fixed on the outer peripheral wall near the lower end of the vertical grinding box and communicates with it. The end of the purge air inlet pipe is closed and a purge blower is fixed on the closed end face. The material transfer pipe is at the same horizontal height as the purge air inlet pipe.
[0030] As an optimized solution, three centrally symmetrical lateral support seats are fixed on the outer peripheral wall of the vertical grinding box. The lateral support seats are hollow C-shaped seats, and the lower ends of the lateral support seats are fixed on the upper surface of the mounting base.
[0031] As an optimized solution, a drive motor is fixed to the upper surface of each of the lateral support seats. The output shaft end of each drive motor passes downward through the lateral support seat and the annular boss seat and is fixed with a drive roller. The three drive rollers respectively abut against the outer circumferential wall of the roller mill outer ring for transmission.
[0032] As an optimized solution, a Y-shaped bracket is provided above the roller mill air cutter seat. The end of the Y-shaped bracket is fixed to the inner peripheral wall of the vertical grinding box. A hollow diverting cone seat is fixed on the upper surface of the Y-shaped bracket. The outer diameter of the diverting cone seat is the same as that of the roller mill air cutter seat. The gypsum powder guided and diverted by the diverting cone seat falls directly into the grinding gap between the outer ring of the roller mill and the roller mill air cutter seat for grinding.
[0033] As an optimized solution, a horizontal support plate is provided above the flow divider cone seat. The horizontal support plate is a circular plate with an opening in the middle. The outer peripheral wall of the horizontal support plate is fixed to the inner peripheral wall of the vertical grinding box. A feed cone is fixed inside the opening in the middle of the horizontal support plate. Three centrally symmetrical connecting reinforcing plates are fixed on the outer peripheral wall of the feed cone. The lower end of the connecting reinforcing plates is fixed to the upper surface of the horizontal support plate.
[0034] As an optimized solution, a closed end cap is provided at the upper opening of the feed cone, and the closed end cap and the feed cone are connected by bolts.
[0035] As an optimized solution, a feeding transfer seat is fixed to the upper surface of the closed end cap and communicates with it. The feeding transfer seat is hollow inside. A multi-section feeding pipe is fixed on the outer wall of the feeding transfer seat. A stirring drive motor is fixed to the upper surface of the feeding transfer seat. A vertical stirring shaft is fixed to the lower end of the output shaft of the stirring drive motor. Several stirring blades are fixed circumferentially on the stirring shaft. The stirring blades are arranged close to the inner circumferential wall of the feeding cone.
[0036] As an optimized solution, a horizontal discharge pipe is fixed on the outer peripheral wall near the lower end of the modified box. The horizontal discharge pipe and the material transfer pipe are at the same horizontal height and located on opposite sides of each other.
[0037] As an optimized solution, the end of the horizontal discharge pipe is closed and a negative pressure fan is fixed on the closed end face. A discharge inclined pipe communicating with the lower surface of the horizontal discharge pipe is fixed thereto. An avoidance notch is opened on the transverse outer wall of the mounting base opposite to the discharge inclined pipe.
[0038] As an optimized solution, the same negative pressure fan is also fixed on the longitudinal outer wall of the material transfer pipe.
[0039] Compared with the prior art, the beneficial effects of the present invention are: 1. Raw material anti-clogging and dispersing effect This equipment features an independent agitation structure in the feeding stage. The agitation blades rotate at high speed against the inner wall of the cone bucket, which can directly break up lumps and agglomerates in the gypsum raw materials. This effectively avoids material blockage in the feeding channel, ensuring continuous and smooth feeding of raw materials without the need for frequent manual unblocking, making it suitable for large-scale continuous production.
[0040] 2. The effect of refining and homogenizing grinding particle size The ultrafine grinding component adopts a relative rolling structure between the inner grinding roller and the outer ring of the roller mill. With the help of a drive motor, the outer ring of the roller mill rotates in the opposite direction, forming a relative grinding motion, which greatly enhances the rolling grinding force on the gypsum material. At the same time, the roller mill air shear seat is equipped with multiple sets of vertical and horizontal air cuts, which, together with the compressed airflow, form a multi-layered staggered shearing air field. This can not only disperse the secondary agglomerated particles between ultrafine powders, but also refine the particle size through wind shearing, thereby achieving ultrafine grinding of gypsum materials. The finished powder has a uniform particle size distribution and high quality stability.
[0041] 3. Wind impact and powder dispersion effect The compressed airflow is evenly delivered after being guided by the spiral guide ring plate, and is injected at high speed from the multi-directional air cut-out, forming a three-dimensional air field inside the grinding chamber. The airflow impacts and disturbs the powder particles at high speed, so that the powder particles are fully dispersed, reducing particle adhesion and agglomeration, and creating good basic conditions for subsequent surface modification.
[0042] 4. Controllable and adjustable grinding process By using a hydraulic telescopic cylinder to drive the horizontal isolation plate to rise and fall, the grinding gap can be opened and closed, thereby precisely controlling the grinding time and the timing of material drop according to production needs. This not only meets the grinding control needs of gypsum powders of different fineness, but also facilitates equipment segmented maintenance and material preservation during shutdown, making production control more flexible.
[0043] 5. Highly efficient and airtight material conveying and transfer. By relying on the directional air delivery of the blowing blower and the suction of the negative pressure fan to form a negative pressure conveying channel, the ground ultrafine gypsum powder can be transferred in a closed pipeline and inside the box without any dust spillage. This not only improves the workshop production environment but also avoids the loss of ultrafine powder. At the same time, relying on the synergistic effect of wind pressure and negative pressure, the material is transported smoothly without accumulation and the transfer efficiency is high.
[0044] 6. The effects of thorough mixing and constant-temperature modification on quality improvement. The modifier is metered and fed into the modification chamber by a metering pump and atomized and dispersed by an atomizing nozzle, forming a uniform atomized atmosphere. Then, the high-speed rotation of the modification turbine forms a vortex field, which drives the powder and the atomized modifier in the chamber to move and collide and contact in a disordered manner, so as to achieve uniform coating and modification of the powder surface and avoid the problems of local aggregation of modifier and uneven modification. The bottom of the modification chamber is equipped with an electric heating plate, which can stably regulate the temperature of the chamber cavity, providing a constant and suitable temperature environment for the surface modification reaction of gypsum powder, ensuring that the modification reaction proceeds fully and stably, and effectively improving the modified quality and performance of ultrafine gypsum powder.
[0045] 7. Overall structural stability and adaptability This equipment adopts an elliptical grounding mounting base with a bottom support frame and side support seats for multi-point fixing structure. The vertical grinding box and modification box are installed stably, and the equipment has low vibration and low operating noise when running at high speed. The whole system integrates feeding and dispersing, ultrafine grinding, air cutting and grading, eddy current modification and automatic discharge. The process integration is high, no need for multiple transfer equipment, small footprint, and suitable for large-scale production line operations in factories. Attached Figure Description
[0046] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0047] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction; Figure 2 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective; Figure 3 This is a schematic diagram of the overall external structure of the present invention from the left-side view direction; Figure 4 This is a schematic diagram of the overall external structure of the present invention from the right-side view direction; Figure 5 This is an isometric schematic diagram of the three-dimensional structure of the present invention; Figure 6 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA. Figure 7 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line; Figure 8 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line; Figure 9 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the DD line in the middle; Figure 10 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the EE line; Figure 11For the present invention along Figure 3 A schematic diagram of the internal structure cut along the FF line.
[0048] In the diagram: 1-Mounting platform, 2-Vertical grinding box, 3-Modification box, 4-Material transfer pipe, 5-Annular boss seat, 6-Bottom support frame, 7-Rotation drive motor, 8-Roller mill air cutter seat, 9-Limit mounting port, 10-Grinding inner roller, 11-Vertical air cutter, 12-Horizontal air cutter, 13-Roller mill outer ring, 14-Clamping ring seat, 15-Vertical air inlet, 16-Spiral guide ring plate, 17-Air inlet, 18-Grinding air inlet pipe, 19-Compressed air pump, 20-Hydraulic telescopic cylinder, 21-Horizontal isolation plate, 22-Purge air inlet pipe, 23-Purge blower, 24-Side support seat, 25-Drive motor, 2 6-Drive roller, 27-Y-type bracket, 28-Diverter cone seat, 29-Horizontal support plate, 30-Feed cone hopper, 31-Connecting reinforcing plate, 32-Closed end cap, 33-Feed transfer seat, 34-Multi-section feeding pipe, 35-Agitator drive motor, 36-Agitator shaft, 37-Agitator blades, 38-Side support frame, 39-Horizontal discharge pipe, 40-Negative pressure fan, 41-Discharge inclined pipe, 42-Avoidance notch, 43-Stepper motor, 44-Modified turbine, 45-Heating plate, 46-Atomizing diverter pipe, 47-Atomizing nozzle, 48-Annular diverter seat, 49-Modifier feeding box, 50-Feeding pipe, 51-Metering pump. Detailed Implementation
[0049] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.
[0050] like Figures 1 to 11 As shown, an ultrafine powder processing equipment for gypsum grinding and modification includes a mounting base 1, which is a horizontally set and grounded elliptical base. A vertical grinding box 2 and a modification box 3 are respectively installed on the mounting base 1. The vertical grinding box 2 and the modification box 3 are connected by a material transfer pipe 4. The vertical grinding box 2 is equipped with an ultrafine grinding component, and the modification box 3 is equipped with an eddy current modification component.
[0051] The vertical grinding box 2 is a cylindrical box with an open top and a closed bottom. The outer peripheral wall of the vertical grinding box 2 near the lower end forms an annular boss 5. A bottom support frame 6 is fixed to one side of the upper surface of the mounting base 1. The lower end of the vertical grinding box 2 is fixed to the upper surface of the bottom support frame 6.
[0052] A rotary drive motor 7 is fixed at the center of the outer bottom surface of the vertical grinding box 2. The output shaft of the rotary drive motor 7 passes through the vertical grinding box 2 and is fixed with a roller grinding air cutter seat 8. The roller grinding air cutter seat 8 is a hollow cylindrical seat. Three centrally symmetrical limiting installation ports 9 are opened on the outer peripheral wall of the roller grinding air cutter seat 8. A grinding inner roller 10 is rotatably installed in each limiting installation port 9.
[0053] The outer peripheral wall of the roller mill air shearing seat 8 is provided with three sets of vertical shearing units. Each set of vertical shearing units includes three vertical air cuts 11 arranged at equal intervals in the circumferential direction, and each set of vertical shearing units is located between two adjacent limit installation ports 9.
[0054] The outer peripheral wall of the roller mill air shearing seat 8 is also provided with six sets of horizontal shearing units. Each set of horizontal shearing units includes eleven horizontal air cuts 12 arranged axially at equal intervals. Two adjacent sets of horizontal shearing units are respectively located on both sides of the vertical shearing unit and between two limiting installation ports 9.
[0055] The annular boss seat 5 is rotatably fitted with a roller grinding outer ring 13. The roller grinding outer ring 13 is positioned directly opposite the roller grinding air cutting seat 8, and a grinding gap is reserved between the two. The inner circumferential wall of the roller grinding outer ring 13 abuts against the outer circumferential wall of the three grinding inner rollers 10.
[0056] A clamping ring seat 14 is fixed in the middle of the lower surface of the roller mill air cutter seat 8, and a vertical air inlet 15 is fixed in the middle of the inner bottom surface of the vertical grinding box 2. The upper end of the vertical air inlet 15 is rotatably clamped in the clamping ring seat 14, and a spiral guide ring plate 16 is fixed on the inner peripheral wall of the vertical air inlet 15.
[0057] The outer bottom surface of the roller mill air cutter seat 8 has six centrally symmetrical air inlets 17, which are located inside the mounting ring seat 14.
[0058] A grinding air inlet pipe 18 is fixed on the outer peripheral wall of the vertical air inlet duct 15 and communicates with it. The grinding air inlet pipe 18 is a square pipe with a closed end. The closed end of the grinding air inlet pipe 18 passes through the side wall of the vertical grinding box 2 and extends to its outer side. A compressed air pump 19 is fixed on the lower surface of the grinding air inlet pipe 18 near the closed end.
[0059] Three centrally symmetrical hydraulic telescopic cylinders 20 are fixed on the inner bottom surface of the vertical grinding box 2. A horizontal isolation plate 21 is fixed at the upper telescopic end of the three hydraulic telescopic cylinders 20. The horizontal isolation plate 21 is an annular plate. The outer peripheral wall of the horizontal isolation plate 21 is closely attached to the inner peripheral wall of the vertical grinding box 2. The horizontal isolation plate 21 is located between the roller mill air cutter seat 8 and the grinding air inlet pipe 18. By controlling the extension and retraction of the hydraulic telescopic cylinders 20, the horizontal isolation plate 21 is driven to rise and fall, which can control the opening and closing of the grinding gap between the roller mill outer ring 13 and the roller mill air cutter seat 8, thereby realizing the isolation or transfer of gypsum powder.
[0060] A purge air inlet pipe 22 is fixed on the outer peripheral wall near the lower end of the vertical grinding box 2 and is connected to it. The end of the purge air inlet pipe 22 is closed and a purge blower 23 is fixed on the closed end face. The material transfer pipe 4 is at the same horizontal height as the purge air inlet pipe 22. The gypsum powder falling to the bottom of the vertical grinding box 2 can be transported to the modification box 3 for modification treatment by the air force generated by the purge blower 23.
[0061] Three centrally symmetrical lateral support seats 24 are fixed on the outer peripheral wall of the vertical grinding box 2. The lateral support seats 24 are hollow C-shaped seats, and the lower end of the lateral support seats 24 is fixed on the upper surface of the mounting base 1.
[0062] Each lateral support 24 has a drive motor 25 fixed on its upper surface. The output shaft of each drive motor 25 passes downward through the lateral support 24 and the annular boss 5 and is fixed with a drive roller 26. The three drive rollers 26 are respectively in contact with the outer circumferential wall of the roller mill outer ring 13 for transmission.
[0063] A Y-shaped bracket 27 is provided above the roller mill air cutter seat 8. The end of the Y-shaped bracket 27 is fixed to the inner peripheral wall of the vertical grinding box 2. A hollow diversion cone seat 28 is fixed on the upper surface of the Y-shaped bracket 27. The outer diameter of the diversion cone seat 28 is the same as that of the roller mill air cutter seat 8. The gypsum powder diverted by the diversion cone seat 28 falls directly into the grinding gap between the roller mill outer ring 13 and the roller mill air cutter seat 8 for grinding.
[0064] A horizontal support plate 29 is provided above the flow divider cone seat 28. The horizontal support plate 29 is a circular plate with an opening in the middle. The outer peripheral wall of the horizontal support plate 29 is fixed on the inner peripheral wall of the vertical grinding box 2. A feed cone 30 is fixed in the middle opening of the horizontal support plate 29. Three centrally symmetrical connecting reinforcing plates 31 are fixed on the outer peripheral wall of the feed cone 30. The lower end of the connecting reinforcing plates 31 is fixed on the upper surface of the horizontal support plate 29.
[0065] A sealing end cover 32 is provided at the upper opening of the feed cone 30, and the sealing end cover 32 and the feed cone 30 are connected by bolts.
[0066] A feeding transfer seat 33 is fixed to the upper surface of the closed end cover 32 and communicates with it. The feeding transfer seat 33 is hollow inside. A multi-section feeding pipe 34 is fixed on the outer wall of the feeding transfer seat 33. A stirring drive motor 35 is fixed on the upper surface of the feeding transfer seat 33. A vertical stirring shaft 36 is fixed at the lower end of the output shaft of the stirring drive motor 35. Several stirring blades 37 are fixed circumferentially on the stirring shaft 36. The stirring blades 37 are set close to the inner circumferential wall of the feeding cone 30. The stirring blades 37 are driven to rotate at high speed by the stirring drive motor 35, which can break up the agglomerated gypsum and prevent the equipment from being blocked.
[0067] Two longitudinally symmetrical side support frames 38 are fixed on the other side of the upper surface of the mounting base 1, and the modified box 3 is fixedly clamped on the two side support frames 38.
[0068] The modification box 3 is a closed vertical cylindrical box. A horizontal discharge pipe 39 is fixed on the outer peripheral wall of the modification box 3 near the lower end. The horizontal discharge pipe 39 and the material transfer pipe 4 are at the same horizontal height and located on the opposite side of each other.
[0069] The end of the horizontal discharge pipe 39 is closed and a negative pressure fan 40 is fixed on the closed end face. The lower surface of the horizontal discharge pipe 39 is fixed with a discharge inclined pipe 41 connected to it. An avoidance notch 42 is opened on the transverse outer wall of the mounting base 1, facing the discharge inclined pipe 41.
[0070] The same negative pressure fan 40 is also fixed on the longitudinal outer wall of the material transfer pipe 4.
[0071] A stepper motor 43 is fixed in the middle of the upper surface of the modification box 3. The output shaft of the stepper motor 43 passes downward through the upper wall of the modification box 3 and is fixed with a modification turbine 44.
[0072] A longitudinally extending electric heating plate 45 is fixed on the lower surface of the modification box 3. The internal temperature of the modification box 3 can be adjusted by heating through the electric heating plate 45.
[0073] An annular atomizing splitter pipe 46 is fixed on the inner top surface of the modification box 3. The atomizing splitter pipe 46 is located above the modification turbine 44. Several centrally symmetrical atomizing nozzles 47 are fixed on the lower surface of the atomizing splitter pipe 46.
[0074] An annular flow divider 48 is fixed in the middle of the upper surface of the modification box 3. The annular flow divider 48 is connected to the atomizing flow divider 46. A modifier feeding box 49 is fixed on one side of the upper surface of the modification box 3. A feed pipe 50 is connected to the outer wall of the modifier feeding box 49. A metering pump 51 is provided at the upper end of the modifier feeding box 49.
[0075] When using this invention: The gypsum raw material is fed into the feed transfer seat 33 through the multi-stage feeding pipe 34, and then falls into the feed cone 30 below. The stirring drive motor 35 is started, which drives the stirring shaft 36 and stirring blades 37 to rotate at high speed, breaking up and crushing the lumpy and agglomerated gypsum material in the feed cone 30, avoiding material bridging and blockage. The broken gypsum material falls naturally down the feed cone 30. When the material falls to the diversion cone seat 28, it is evenly diverted by the guiding effect of the cone surface of the diversion cone seat 28 and falls precisely into the grinding gap between the outer ring 13 of the roller mill and the air cutter seat 8 of the roller mill. Start the rotation drive motor 7, which drives the roller mill air cutter seat 8 to rotate at high speed. The three grinding inner rollers 10 rotate synchronously with the roller mill air cutter seat 8 and roll and fit against the inner wall of the roller mill outer ring 13 to perform roller pressing ultrafine grinding on the gypsum material in the gap. During the grinding operation, the compressed air pump 19 introduces compressed airflow into the vertical air inlet duct 15 through the grinding air inlet pipe 18. After the airflow is spirally guided by the spiral guide ring plate 16 inside the vertical air inlet duct 15, it enters the cavity from the air inlet 17 at the bottom of the roller mill air cutter seat 8, and then is ejected at high speed from each set of vertical air cutters 11 and horizontal air cutters 12, forming a multi-layered staggered shearing air field. The airflow performs wind shearing on the gypsum particles in the grinding process, breaking up the fine powder agglomerates. At the same time, it further refines the powder particle size in conjunction with the roller mill action, thus completing the preparation of ultrafine powder. When the equipment is running, the three drive motors 25 drive the drive rollers 26 to rotate synchronously. The outer ring 13 of the roller mill rotates smoothly by relying on friction, forming a reverse relative motion with the inner grinding roller 10, which improves the roller mill extrusion and grinding shearing effect, and ensures that the gypsum powder is ground into uniform particle size. Three hydraulic telescopic cylinders 20 can simultaneously drive the horizontal isolation plate 21 to rise and fall, thereby blocking or avoiding the falling channel of the grinding gap, realizing the isolation and conduction of the grinding chamber, and controlling the material grinding process and the timing of material falling as needed; The gypsum powder that has been ultra-fine ground falls to the bottom of the vertical grinding box 2. The blowing blower 23 works to generate a directional airflow, which is sent into the vertical grinding box 2 through the blowing inlet pipe 22. The deposited ultra-fine gypsum powder is pushed along the air pressure. At the same time, the negative pressure fan 40 located on the material transfer pipe 4 is started to suck up the ultra-fine gypsum powder in the vertical grinding box 2 and send it into the modification box 3 through the material transfer pipe 4. During the modification operation, the modifier in the modifier feeding box 49 is precisely controlled by the metering pump 51 and sent to the annular diverter seat 48 through the feeding pipe 50, and then diverted to the atomizing diverter pipe 46, and evenly atomized and sprayed out by multiple atomizing nozzles 47 at the bottom, and dispersed in the upper cavity of the modification box 3. Start the stepper motor 43 to drive the modified turbine 44 to rotate at high speed, stirring the airflow in the box to form a vortex field, so that the gypsum ultrafine powder and the atomized modifier can fully contact, mix and coat each other; The electric heating plate 45 at the bottom of the modification box 3 provides continuous heat and precisely controls the reaction temperature inside the box, providing a suitable temperature field environment for the surface modification of gypsum powder and ensuring that the modification reaction is fully carried out. After modification, the qualified powder is drawn by the negative pressure fan 40 and collected through the horizontal discharge pipe 39, and finally discharged outward from the discharge inclined pipe 41, completing the whole process of gypsum material from feeding and dispersing, ultrafine roller mill air shearing and classification, to eddy current constant temperature atomization modification and automatic discharge.
[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.
Claims
1. An ultrafine powder processing equipment for gypsum grinding and modification, characterized in that: The device includes a mounting base on which a vertical grinding chamber and a modification chamber are respectively mounted. The vertical grinding chamber and the modification chamber are connected by a material transfer pipe. The vertical grinding chamber contains an ultrafine grinding component, and the modification chamber contains an eddy current modification component. The vertical grinding box is a cylindrical box with an open top and a closed bottom. The outer peripheral wall of the vertical grinding box near the lower end forms an outward annular boss. A rotary drive motor is fixed at the center of the outer bottom surface of the vertical grinding box. The output shaft of the rotary drive motor passes through the vertical grinding box and is fixed with a roller grinding air cutter seat. The roller grinding air cutter seat is a hollow cylindrical seat. Three centrally symmetrical limiting installation holes are opened on the outer peripheral wall of the roller grinding air cutter seat. A grinding inner roller is rotatably installed in each of the limiting installation holes. The outer peripheral wall of the roller mill air shearing seat is provided with three sets of vertical shearing units. Each set of vertical shearing units includes three vertical air cuts arranged at equal intervals in the circumferential direction, and each set of vertical shearing units is located between two adjacent limiting installation ports. The outer peripheral wall of the roller mill air shearing seat is also provided with six sets of horizontal shearing units. Each set of horizontal shearing units includes eleven horizontal air cuts arranged axially at equal intervals. Two adjacent sets of horizontal shearing units are respectively located on both sides of the vertical shearing unit and between the two limiting installation ports. The annular boss seat is rotatably fitted with a roller grinding outer ring, which is positioned directly opposite the roller grinding air cutting seat, with a grinding gap reserved between them. The inner circumferential wall of the roller grinding outer ring abuts against the outer circumferential walls of the three grinding inner rollers. The outer bottom surface of the roller mill air cutter has six centrally symmetrical air inlets.
2. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 1, characterized in that: The mounting base is a horizontally positioned, grounded elliptical base; A bottom support frame is fixed to one side of the upper surface of the mounting base, and the lower end of the vertical grinding box is fixed to the upper surface of the bottom support frame. The modified box is a closed vertical cylindrical box. Two longitudinally symmetrical side support frames are fixed on the other side of the upper surface of the mounting base. The modified box is fixedly clamped onto the two side support frames.
3. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 2, characterized in that: A stepper motor is fixed in the middle of the upper surface of the modified box, and the output shaft end of the stepper motor passes downward through the upper wall of the modified box and is fixed with a modified turbine. A longitudinally extending electric heating plate is fixed to the lower surface of the modification box, and the temperature inside the modification box can be adjusted by heating the electric heating plate. An annular atomizing splitter is fixed on the inner top surface of the modified box. The atomizing splitter is located above the modified turbine. Several centrally symmetrical atomizing nozzles are fixed on the lower surface of the atomizing splitter. An annular flow divider is fixed in the middle of the upper surface of the modification box. The annular flow divider is connected to the atomizing flow divider. A modifier feeding box is fixed on one side of the upper surface of the modification box. A feed pipe is connected to the outer wall of the modifier feeding box. A metering pump is provided at the upper end of the modifier feeding box.
4. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 3, characterized in that: A clamping ring seat is fixed in the middle of the lower surface of the roller mill air cutter seat, and a vertical air inlet is fixed in the middle of the inner bottom surface of the vertical grinding box. The upper end of the vertical air inlet is rotatably clamped in the clamping ring seat. A spiral guide ring plate is fixed on the inner peripheral wall of the vertical air inlet. The six air inlets are located on the inner side of the clamping ring seat. A grinding air inlet pipe is fixed to the outer peripheral wall of the vertical air inlet duct and communicates with it. The grinding air inlet pipe is a square pipe with a closed end. The closed end of the grinding air inlet pipe passes through the side wall of the vertical grinding box and extends to its outer side. A compressed air pump is fixed to the lower surface of the grinding air inlet pipe near the closed end.
5. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 4, characterized in that: Three centrally symmetrical hydraulic telescopic cylinders are fixed on the inner bottom surface of the vertical grinding box. A horizontal isolation plate is fixed to the upper telescopic end of the three hydraulic telescopic cylinders. The horizontal isolation plate is an annular plate. The outer peripheral wall of the horizontal isolation plate is closely attached to the inner peripheral wall of the vertical grinding box. The horizontal isolation plate is located below the roller mill air cutting seat and above the grinding air inlet pipe.
6. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 5, characterized in that: The vertical grinding box has a purge air inlet pipe fixed on its outer peripheral wall near the lower end, and the purge air inlet pipe is closed at the end and a purge blower is fixed on the closed end face. The material transfer pipe is at the same horizontal height as the purge air inlet pipe.
7. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 6, characterized in that: Three centrally symmetrical lateral support seats are fixed on the outer peripheral wall of the vertical grinding box. The lateral support seats are hollow C-shaped seats, and the lower end of the lateral support seats is fixed on the upper surface of the mounting base. Each of the lateral support seats has a drive motor fixed on its upper surface. The output shaft of each drive motor passes downward through the lateral support seat and the annular boss seat and is fixed with a drive roller. The three drive rollers respectively abut against the outer circumferential wall of the roller mill outer ring.
8. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 7, characterized in that: A Y-shaped bracket is provided above the roller mill air cutter seat. The end of the Y-shaped bracket is fixed to the inner peripheral wall of the vertical grinding box. A hollow diverter cone seat is fixed on the upper surface of the Y-shaped bracket. The outer diameter of the diverter cone seat is the same as that of the roller mill air cutter seat. The gypsum powder diverted by the diverter cone seat falls directly into the grinding gap between the outer ring of the roller mill and the roller mill air cutter seat for grinding.
9. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 8, characterized in that: A horizontal support plate is provided above the flow divider cone seat. The horizontal support plate is a circular plate with an opening in the middle. The outer peripheral wall of the horizontal support plate is fixed to the inner peripheral wall of the vertical grinding box. A feed cone is fixed inside the opening in the middle of the horizontal support plate. Three centrally symmetrical connecting reinforcing plates are fixed on the outer peripheral wall of the feed cone. The lower end of the connecting reinforcing plates is fixed to the upper surface of the horizontal support plate. The upper opening of the feed cone is covered with a closed end cap, and the closed end cap and the feed cone are connected by bolts. The upper surface of the closed end cap is fixed with a feeding transfer seat that communicates with it. The feeding transfer seat is hollow inside. A multi-section feeding pipe is fixed on the outer wall of the feeding transfer seat. A stirring drive motor is fixed on the upper surface of the feeding transfer seat. A vertical stirring shaft is fixed at the lower end of the output shaft of the stirring drive motor. Several stirring blades are fixed circumferentially on the stirring shaft. The stirring blades are set close to the inner circumferential wall of the feeding cone.
10. The ultrafine powder processing equipment for gypsum grinding and modification according to claim 9, characterized in that: A horizontal discharge pipe is fixed on the outer peripheral wall near the lower end of the modified box. The horizontal discharge pipe and the material transfer pipe are at the same horizontal height and located on opposite sides of each other. The horizontal discharge pipe is closed at its end and a negative pressure fan is fixed on the closed end face. A discharge inclined pipe communicating with it is fixed on the lower surface of the horizontal discharge pipe. An avoidance notch is opened on the transverse outer wall of the mounting base facing the discharge inclined pipe. The same negative pressure fan is also fixed on the longitudinal outer wall of the material transfer pipe.