Cement production device and production method
By introducing separation ring, acceleration ring and deflector structure into the cement production device, combined with air holes and limit rods, the problems of coarse particulate material escape and wear of the grinding roller are solved, and low energy consumption and high efficiency grinding and equipment life are achieved.
Patent Information
- Application Number
- CN202510602325.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-07-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing cement production devices, the retaining ring easily escapes or is excessively retained when intercepting coarse particulate materials, resulting in high fan energy consumption and serious wear of the edges of the grinding disc and rollers.
The separation ring, acceleration ring and deflector structure is adopted, and the ungrounded material is guided to the center of the grinding disc by centrifugal force, and the fine powder is collected through the air holes and airflow. The limit rod and return module are used to block large particulate materials, avoid direct contact with the grinding roller, and reduce fan energy consumption and wear of the grinding roller.
It effectively reduces the energy consumption of the fan, reduces the wear of the grinder and rollers, extends the service life of the equipment, and reduces carbon emissions.
Smart Images
Figure CN120362002A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cement production devices, and in particular, to a cement production device and a production method. Background Art
[0002] Cement production involves various technological innovations and system integrations. Carbon emissions can be reduced by means of alternative raw materials and optimized clinker, specifically: reusing industrial by-products, replacing part of the limestone with blast furnace slag, fly ash, etc., reducing the calcination demand, and limestone calcination accounts for more than 60% of the cement carbon emissions.
[0003] A vertical roller mill is used to grind blast furnace slag and fly ash. Its core grinding components are the grinding table and the grinding rollers, and the two achieve material crushing through mechanical cooperation. In order to prevent unground materials from directly leaving the grinding table under the action of centrifugal force, a retaining ring is generally used to block the materials. However, in this way that relies on intercepting with a retaining ring of a fixed height, coarse particles are likely to escape or be overly retained, and the escaped coarse particles need to be blown by a fan to a classifier and then returned to the grinding table again. This results in a large air flow resistance and high fan energy consumption. Since the materials at the retaining ring need to be ground, the retaining ring needs to contact the grinding rollers, resulting in serious wear at the edges of the grinding table and the grinding rollers, and frequent replacement is required. Summary of the Invention
[0004] The purpose of the present invention is to address the problems in the background art and propose a cement production device and a production method that avoid using a retaining ring and can discharge the materials that are not ground in place and separated from the grinding table to the grinding table in a low-energy-consuming manner.
[0005] On the one hand, the present invention proposes a cement production device, including a frame, a grinding box installed on the frame, a feeding port provided on the grinding box, and a classifier fixedly installed on the grinding box. It further includes:
[0006] A grinding table rotatably installed inside the grinding box, a reduction motor fixedly installed on the frame to drive the grinding table to rotate, and a plurality of grinding rollers rotatably installed inside the grinding box. A pressure adjustment assembly for adjusting the pressure of the grinding rollers is installed on the frame and connected to the grinding rollers;
[0007] An annular and upturned separation ring installed at the edge of the grinding table. An acceleration ring is fixedly installed on the outside of the separation ring. A deflector is fixedly connected to the grinding box above the acceleration ring. The separation ring guides the materials discharged from the grinding table to the acceleration ring, and the acceleration ring uses centrifugal force to throw the materials to the deflector, and the deflector guides the moving direction of the materials to the central position of the grinding table;
[0008] A plurality of air holes provided inside the grinding box and surrounding the separation ring. The air holes blow air flow towards the classifier located above. The air holes are located between the acceleration ring and the separation ring.
[0009] Optionally, a plurality of limiting rods are slidably mounted on the separation ring, and the sizes of the materials passing through the separation ring are limited by two adjacent limiting rods. A material return module for driving the plurality of limiting rods to apply a thrust force to the materials with a volume larger than the gap between two adjacent limiting rods is installed in the grinding box, and the thrust force is directed upward above the center of the grinding disc.
[0010] Optionally, the material return module includes a plurality of chutes provided on the separation ring. Elastic plug blocks are installed in the chutes. The plug blocks are fixedly connected to the limiting rods. A driving rod is fixedly installed on the limiting rod. The driving rod penetrates through the plug block and extends below the separation ring. A connecting rod is rotatably installed on the driving rod. A driving ring is rotatably and slidably installed in the grinding box. The connecting rod is rotatably connected to the driving ring.
[0011] Optionally, the material return module further includes support rings rotatably installed in the grinding box in the up and down directions. A plurality of sliders are slidably installed in the support rings. The sliders on the upper and lower sides correspond to each other one by one and a smooth shaft is fixedly installed between them. The driving ring is slidably connected to the smooth shaft. Springs are fixedly installed between the sliders and the driving ring.
[0012] Optionally, the material return module further includes a connecting shaft fixedly installed on the driving ring. A support wheel is rotatably installed on the connecting shaft. A driving seat is fixedly installed in the grinding box. A guiding slope with a gradually increasing height is provided on the driving seat. A dropping part is vertically arranged at the highest and lowest positions of the guiding slope.
[0013] Optionally, guiding inclined surfaces are provided on the limiting rods. A cross bar is installed between two adjacent limiting rods. Connecting rods are rotatably installed at both ends of the cross bar. The connecting rods are rotatably connected to the adjacent limiting rods. An inclined surface is provided on the cross bar.
[0014] Optionally, the separation ring and the acceleration ring are fixedly connected by a round rod. An extension plate is provided on the acceleration ring. A baffle is fixedly installed on the extension plate. A limiting plate is fixedly installed on the acceleration ring. A conical surface is provided on the limiting plate.
[0015] Optionally, an air cavity is provided in the guide plate. Exhaust holes are provided on the air cavity. The air cavity is connected to an air pump device.
[0016] Optionally, a plurality of positioning rods are fixedly installed on the extension plate. Guide wheels are rotatably installed on the positioning rods. A guiding groove is provided in the grinding box. The guide wheels are located inside the guiding groove.
[0017] On the other hand, the present invention provides a cement production method, which is applied to the above cement production device. The method includes the following steps:
[0018] Step 1: Put blast furnace slag and fly ash into the grinding chamber through the feeding port for grinding. After grinding, they replace part of the limestone to reduce the calcination demand and thus reduce carbon emissions.
[0019] Step 2: Drive the grinding disc to rotate through a reduction motor. When the grinding disc rotates, the grinding roller is driven to rotate passively by friction to form a rolling effect on the material.
[0020] Step 3: The material that has not contacted the grinding roller and has separated from the grinding disc under the action of centrifugal force passes through the separation ring, acceleration ring and deflector and returns to above the grinding disc after passing through the air holes twice.
[0021] Step 4: Rising gas is blown out from the air holes, driving the dust passing above the air holes to rise to the powder separator. The qualified dust will be collected, and the unqualified dust will return to the grinding disc for further grinding.
[0022] Step 5: Block the materials with larger volume through the limit rod to prevent the separation ring, acceleration ring and deflector from being unable to smoothly guide the materials with larger volume and gravity to the grinding disc.
[0023] Step 6: Through the return material module, the material adhering to the limit rod under the action of centrifugal force is pushed back to the center of the grinding disc again to prevent the grinding roller from directly contacting the limit rod and reduce the wear of the grinding roller.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] By using blast furnace slag and fly ash to replace part of the limestone, the present invention can reduce the calcination demand to reduce carbon emissions, and under the action of the separation ring, acceleration ring and deflector, the particles that do not meet the requirements can return to the center of the grinding disc again, which can prevent the problems of easy escape or excessive retention of coarse particles, effectively reduce the energy consumption of the fan, and reduce the wear degree of the edge of the grinding disc and grinding roller to extend the service life of the grinding disc and grinding roller. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic structural diagram of a cement production device;
[0027] Figure 2 It is a schematic diagram of the positions of the grinding disc and grinding roller;
[0028] Figure 3 It is a schematic diagram of the position of the air holes;
[0029] Figure 4 For Figure 3 The partial enlarged view at A in
[0030] Figure 5 It is a schematic structural diagram of the grinding disc and grinding roller;
[0031] Figure 6 Schematic structural diagram of the driving seat;
[0032] Figure 7 Schematic structural diagram of the separation ring, acceleration ring and deflector;
[0033] Figure 8 Schematic internal structural diagram of the separation ring, acceleration ring and deflector;
[0034] Figure 9 is Figure 8 Local enlarged view at position B in
[0035] Figure 10 is Figure 8 Local enlarged view at position C in
[0036] Figure 11 Schematic structural diagram of the return material module;
[0037] Figure 12 Schematic structural diagram of the limiting rod and the cross bar.
[0038] Reference numerals: 1, frame; 101, grinding box; 102, feeding port; 2, powder separator; 3, grinding table; 4, grinding roller; 401, pressure regulating assembly; 5, separation ring; 501, acceleration ring; 502, round rod; 503, extension plate; 504, baffle; 505, limiting plate; 506, conical surface; 507, deflector; 508, air cavity; 509, exhaust hole; 510, positioning rod; 511, guide wheel; 6, limiting rod; 601, sliding groove; 602, blocking block; 603, driving rod; 604, connecting rod; 605, driving ring; 606, support ring; 607, slider; 608, optical axis; 609, spring; 610, guiding inclined surface; 611, connecting shaft; 612, support wheel; 613, driving seat; 6131, guiding slope; 6132, dropping part; 614, cross bar; 615, connecting rod; 616, inclined surface; 7, air hole; 8, reduction motor. Specific embodiments
[0039] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0040] As Figures 1 to 3As shown in the figure, the present invention provides a cement production device, which includes a frame 1, a grinding box 101 installed on the frame 1, a feeding port 102 provided on the grinding box 101, and a powder separator 2 fixedly installed on the grinding box 101. Materials enter the grinding box 101 through the feeding port 102 for grinding. The ground dust is blown into the powder separator 2. The particles that meet the requirements will be stored, and those that do not meet the requirements will be discharged back into the grinding box 101 again (the powder separator 2 is a prior art and will not be elaborated here). It further includes a grinding table 3 rotatably installed inside the grinding box 101, a reduction motor 8 fixedly installed on the frame 1 to drive the grinding table 3 to rotate, and a plurality of grinding rollers 4 rotatably installed inside the grinding box 101. The output shaft of the reduction motor 8 is fixedly connected to the grinding table through a coupling. By means of the reduction motor 8, the grinding table 3 can be driven to rotate. The materials on the grinding table 3 will gradually move towards the edge under the action of centrifugal force, and at the same time, the grinding rollers 4 will be driven to rotate under the action of frictional force. The materials entering below the grinding rollers 4 will be extruded and crushed. A pressure adjustment assembly 401 for adjusting the pressure on the grinding rollers 4 and connected to the grinding rollers 4 is installed on the frame 1. The pressure adjustment assembly 401 will drive the grinding rollers 4 to apply pressure to the grinding table 3 (the pressure adjustment assembly 401 is a prior art and will not be elaborated here).
[0041] As Figure 4 , Figure 8 , Figure 10 As shown in the figure, this embodiment of the cement production device further includes an annular and upturned separation ring 5 installed at the edge of the grinding table 3. An acceleration ring 501 is fixedly installed on the outer side of the separation ring 5. A deflector 507 is fixedly connected to the grinding box 101 above the acceleration ring 501. The separation ring 5 guides the materials discharged from the grinding table 3 to the acceleration ring 501. The acceleration ring 501 uses centrifugal force to throw the materials to the deflector 507. The deflector 507 guides the moving direction of the materials to the center position of the grinding table 3. Due to the upturned structure of the separation ring 5, when the materials break away from the separation ring 5 under the action of centrifugal force, they will move obliquely upward. The materials moving obliquely upward will enter the acceleration ring 501. Since the acceleration ring 501 rotates synchronously with the separation ring 5 and the grinding table 3, and the diameter of the acceleration ring 501 is larger than that of the separation ring 5, in a rotating system, centrifugal force is directly related to the rotation radius, and centrifugal force is proportional to the rotation radius. The larger the diameter, the greater the centrifugal force. Therefore, the materials on the acceleration ring 501 will obtain a greater centrifugal force, and thus the linear velocity of the materials when breaking away from the acceleration ring 501 will be faster. Therefore, the kinetic energy of the materials will also be stronger. The kinetic energy of the materials can overcome the energy consumption when moving along the deflector 507, thereby ensuring that the materials can fly out along the deflector 507 and fall back onto the grinding table 3 again.
[0042] It should be noted that the cement production device of this embodiment further includes a plurality of air holes 7 disposed in the grinding box 101 and around the separation ring 5. The air holes 7 blow out air currents towards the classifier 2 located above. The air holes 7 are located between the acceleration ring 501 and the separation ring 5. Both the uncrushed materials and the crushed materials will pass above the air holes 7. The upward air current in the air holes 7 will drive the smaller dust particles to rise, while it cannot drive the larger particles to rise. This can collect the dust after grinding, and there is no need to set a relatively high wind speed to drive the larger particles to rise and be separated and recycled by the classifier 2. Therefore, the energy consumption of the fan system can be effectively reduced. Moreover, the particles passing through the guide plate 507 will pass through the air holes 7 again, which can further collect the qualified dust and prevent the large particles from falling rapidly, enabling the large particles to move to the center of the grinding table 3 and circulate again.
[0043] Furthermore, the separation ring 5 and the acceleration ring 501 are fixedly connected by a round rod 502. The acceleration ring 501 is provided with an extension plate 503, and a baffle 504 is fixedly installed on the extension plate 503. The baffle 504 and the extension plate 501 can carry more materials and prevent the materials from falling off the acceleration ring 501. A limiting plate 505 is fixedly installed on the acceleration ring 501, and a conical surface 506 is provided on the limiting plate 505. The conical surface 506 can separate the materials hitting the limiting plate 505 to both sides, preventing the particulate matter from rebounding and causing it to be unable to effectively return above the grinding table 3. Since relative movement may occur between the materials and the acceleration ring 501 when the materials move on the acceleration ring 501, this will reduce the angular velocity of the materials, and the reduction of the angular velocity will reduce the centrifugal force of the materials, which is not conducive to increasing the kinetic energy of the materials when leaving the acceleration ring 501. Through the setting of the limiting plate 505, the materials will be pushed above the limiting plate 505, so that the angular velocity of the materials is consistent with that of the acceleration ring 501. A plurality of positioning rods 510 are fixedly installed on the extension plate 503, and guide wheels 511 are rotatably installed on the positioning rods 510. Guide grooves are provided in the grinding box 101, and the guide wheels 511 are located inside the guide grooves. The cooperation of the guide wheels 511 and the guide grooves can make the acceleration ring 501 rotate smoothly.
[0044] Among them, an air cavity 508 is provided in the guide plate 507, and exhaust holes 509 are provided on the air cavity 508. The air cavity 508 is connected to an air pump device. Since the mass of the small-particle materials is small, the centrifugal force they receive will also be small. At this time, high-pressure gas is ejected through the exhaust holes 509, which can provide power for the materials, enabling the materials to move along the guide plate 507. Moreover, the guide plate 507 is stationary and will not apply centrifugal force to the materials, so that the materials will not be pushed inside the guide plate 507.
[0045] Such as Figures 5 to 7 and Figures 11 to 12As shown, in this embodiment, a plurality of limiting rods 6 are slidably mounted on the separation ring 5. The size of the material passing through the separation ring 5 is limited by two adjacent limiting rods 6. When there are some larger materials, these materials can be separated from the material tray 3 under the action of centrifugal force before being ground. The volume of such particulate matter exceeds the upper limit of the volume of the object that the diversion plate 507 can divert. Therefore, it is necessary to block such large particles. The large particles can be prevented from separating from the material tray 3 before being ground through the limiting rods 6. A return material module is installed in the grinding box 101 to drive a plurality of limiting rods 6 to apply a thrust to the material with a volume larger than the gap between two adjacent limiting rods 6. The thrust direction is upward above the center of the grinding disc 3. Since the large particles will abut against the limiting rods 6, in order to reduce the wear of the grinding roller 4, there needs to be a gap between the grinding roller 4 and the limiting rods 6. Therefore, the particles abutting against the limiting rods 6 may not be completely crushed in a single time, and when the grinding roller 4 directly squeezes the material abutting against the limiting rods 6, an extrusion force will be applied to the material, which easily causes the material to get stuck inside the two limiting rods 6, resulting in the inability of the remaining small particle materials to effectively separate between two adjacent limiting rods 6, and the limiting rods 6 will be stuck. Therefore, it is necessary to apply a thrust to the large particle materials abutting against the limiting rods 6 to move the large particle materials towards the middle of the grinding disc 3 again, so that the large particle materials are crushed during the movement process.
[0046] Among them, further, the return material module includes a plurality of chutes 601 provided on the separation ring 5. An elastic plugging block 602 is installed in the chutes 601. The arrangement of the plugging block 602 will block the chutes 601 to prevent the material from sliding out through the chutes 601. The plugging block 602 is fixedly connected to the limiting rod 6. A driving rod 603 is fixedly installed on the limiting rod 6. The driving rod 603 penetrates through the plugging block 602 and extends below the separation ring 5. A connecting rod 604 is rotatably installed on the driving rod 603. A driving ring 605 is rotatably and slidably installed in the grinding box 101. The connecting rod 604 is rotatably connected to the driving ring 605. When the driving ring 605 moves up and down, the limiting rod 6 will be driven to move along the chute 601 under the action of the connecting rod 604, and thus a thrust can be applied to the material.
[0047] Furthermore, the return material module further includes support rings 606 rotatably installed in the grinding box 101 in the up and down directions. A plurality of sliders 607 are slidably installed in the support rings 606. The upper and lower sliders 607 correspond to each other one by one and a light shaft 608 is fixedly installed between them. The driving ring 605 is slidably connected to the light shaft 608. A spring 609 is fixedly installed between the slider 607 and the driving ring 605. The driving ring 605 will rotate along with the grinding disc 3 and drive a plurality of light shafts 608 to rotate in the support ring 606, and the driving ring 605 can move up and down along the light shaft 608. When the driving ring 605 moves, one side of the spring 609 will be compressed and the other side of the spring 609 will be stretched.
[0048] It should be noted that the material return module further includes a connecting shaft 611 fixedly installed on the driving ring 605. A supporting wheel 612 is rotatably installed on the connecting shaft 611. A driving seat 613 is fixedly installed in the grinding box 101. A guiding slope 6131 with a gradually increasing height is provided on the driving seat 613. A dropping part 6132 is vertically arranged between the highest point and the lowest point of the guiding slope 6131. The supporting wheel 612 will gradually rise along the guiding slope 6131. After rising to the highest point, it will descend through the dropping part 6132 under the action of the spring 609, thereby driving the driving ring 605 to quickly descend. This will cause the multiple limiting rods 6 to quickly contract. Since the moving speed of the limiting rods 6 is relatively fast, the kinetic energy exerted by the limiting rods 6 on the large particles is also large, so that the large particles have sufficient kinetic energy to move to the center of the grinding disc 3.
[0049] It is worth noting that a guiding inclined surface 610 is provided on the limiting rod 6. A cross bar 614 is installed between two adjacent limiting rods 6. Connecting rods 615 are rotatably installed at both ends of the cross bar 614. The connecting rods 615 are rotatably connected to the adjacent limiting rods 6. An inclined surface 616 is provided on the cross bar 614. The cross bar 614 further limits the size of the particles. Due to the arrangement of the guiding inclined surface 610 and the inclined surface 616, an obliquely upward thrust can be exerted on the particles, causing the large particles to move upward, thereby preventing the large particles moving inward from interfering with the small particles moving outward.
[0050] On the other hand, the present invention proposes a cement production method applied to the above cement production device. The method includes the following steps:
[0051] Step 1: Put blast furnace slag and fly ash into the grinding box 101 through the feeding port 102 for grinding. After grinding, they replace part of the limestone to reduce the calcination demand and thus reduce carbon emissions.
[0052] Step 2: Drive the grinding disc 3 to rotate through a reduction motor. When the grinding disc 3 rotates, it drives the grinding roller 4 to rotate passively through friction, forming a rolling effect on the material.
[0053] Step 3: The material that has not contacted the grinding roller 4 and has separated from the grinding disc under the action of centrifugal force passes through the separation ring 5, the acceleration ring 501 and the guide plate 507 and passes through the two air holes 7 twice and then returns above the grinding disc 3 again.
[0054] Step 4: Blow rising gas in the air holes 7 to drive the dust passing above the air holes 7 to rise to the powder separator 2. The qualified dust will be collected, and the unqualified dust will return to the grinding disc 3 for further grinding.
[0055] Step 5: The limiting rod 6 is used to block the material with a large volume, so as to prevent the separation ring 5, the acceleration ring 501 and the guide plate 507 from being unable to smoothly guide the material with a large volume and gravity to the grinding disc 3;
[0056] Step 6: The material that is attached to the limit rod 6 under the action of centrifugal force is pushed to the center of the grinding disc 3 again through the material return module to avoid direct contact between the grinding roller 4 and the limit rod 6 and reduce the wear of the grinding roller 4.
[0057] In this embodiment, based on the upward structure of the separation ring 5, the material will move diagonally upward when it separates from the separation ring 5 under the action of centrifugal force, and the material moving diagonally upward will enter the acceleration ring 501. Since the acceleration ring 501 rotates synchronously with the separation ring 5 and the grinding disc 3, and the diameter of the acceleration ring 501 is larger than the separation ring 5, the material on the acceleration ring 501 will obtain a greater centrifugal force, thereby making the material have a faster linear speed when it separates from the acceleration ring 501, so the kinetic energy of the material will be stronger. The kinetic energy of the material can overcome the energy consumption when moving along the guide plate 507, thereby ensuring that the material can fly out along the guide plate 507 and fall on the grinding disc 3 again. In this process, the upward airflow in the air hole 7 will drive smaller dust to rise.
[0058] Since the large particles will rest against the limit rod 6, in order to reduce the loss of the grinding roller 4, the grinding roller 4 needs to maintain a gap with the limit rod 6. Therefore, the particles resting against the limit rod 6 may not be completely crushed in a single time. The grinding roller 4 directly squeezes the material resting against the limit rod 6, which will exert an extrusion force on the material, which may easily cause the material to be stuck inside the two limit rods 6, resulting in the inability to effectively separate the remaining small particles between the two adjacent limit rods 6, and causing the limit rod 6 to be stuck. Therefore, it is necessary to apply a thrust to the large particles resting against the limit rod 6, so that the large particles can be moved to the middle of the grinding disc 3 again, so that the large particles can be crushed during the movement.
[0059] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A cement production device, comprising a frame (1), a grinding box (101) installed on the frame (1), a feeding port (102) provided on the grinding box (101), and a powder separator (2) fixedly installed on the grinding box (101), characterized in that, It also includes: A grinding disc (3) rotatably installed inside the grinding box (101), a reduction motor (8) fixedly installed on the frame (1) to drive the grinding disc (3) to rotate, and a plurality of grinding rollers (4) rotatably installed inside the grinding box (101). A pressure adjustment assembly (401) connected to the grinding rollers (4) and used for adjusting the pressure of the grinding rollers (4) is installed on the frame (1); An annular and upturned separation ring (5) installed at the edge of the grinding disc (3). An acceleration ring (501) is fixedly installed on the outer side of the separation ring (5). A deflector plate (507) is fixedly connected to the grinding box (101) above the acceleration ring (501). The separation ring (5) guides the materials discharged from the grinding disc (3) to the acceleration ring (501). The acceleration ring (501) uses centrifugal force to throw the materials to the deflector plate (507), and the deflector plate (507) guides the moving direction of the materials to the central position of the grinding disc (3); A plurality of air holes (7) arranged inside the grinding box (101) and around the separation ring (5). The air holes (7) blow out air flow towards the powder separator (2) located above. The air holes (7) are located between the acceleration ring (501) and the separation ring (5).
2. The cement production device according to claim 1, characterized in that, A plurality of limiting rods (6) are slidably installed on the separation ring (5). The size of the materials passing through the separation ring (5) is limited by adjacent two limiting rods (6). A return material module for applying a thrust force to the materials with a volume larger than the gap between adjacent two limiting rods (6) is installed inside the grinding box (101). The thrust direction is towards the upper part above the center of the grinding disc (3).
3. A cement production device according to claim 2, characterized in that, The return material module includes a plurality of chutes (601) arranged on the separation ring (5). Elastic plug blocks (602) are installed inside the chutes (601). The plug blocks (602) are fixedly connected to the limiting rods (6). A driving rod (603) is fixedly installed on the limiting rod (6). The driving rod (603) penetrates through the plug block (602) and extends to the lower part of the separation ring (5). A connecting rod (604) is rotatably installed on the driving rod (603). A driving ring (605) is rotatably and slidably installed inside the grinding box (101). The connecting rod (604) is rotatably connected to the driving ring (605).
4. A cement production device according to claim 3, characterized in that, The return material module also includes support rings (606) rotatably installed inside the grinding box (101) in the up and down directions. A plurality of sliders (607) are slidably installed inside the support rings (606). The upper and lower sliders (607) correspond to each other one by one and a light shaft (608) is fixedly installed between them. The driving ring (605) is slidably connected to the light shaft (608). A spring (609) is fixedly installed between the slider (607) and the driving ring (605).
5. A cement production device according to claim 4, characterized in that, The return material module further includes a connecting shaft (611) fixedly installed on the driving ring (605). A supporting wheel (612) is rotatably installed on the connecting shaft (611). A driving seat (613) is fixedly installed in the grinding box (101). A guiding slope (6131) with a gradually rising height is provided on the driving seat (613). A dropping part (6132) is vertically arranged at the highest and lowest positions of the guiding slope (6131).
6. A cement production device according to claim 5, characterized in that, A guiding inclined surface (610) is provided on the limiting rod (6). A cross bar (614) is installed between two adjacent limiting rods (6). Connecting rods (615) are rotatably installed at both ends of the cross bar (614). The connecting rods (615) are rotatably connected to the adjacent limiting rods (6). An inclined surface (616) is provided on the cross bar (614).
7. A cement production device according to claim 6, characterized in that, The separating ring (5) and the accelerating ring (501) are fixedly connected by a round rod (502). An extension plate (503) is provided on the accelerating ring (501). A baffle (504) is fixedly installed on the extension plate (503). A limiting plate (505) is fixedly installed on the accelerating ring (501). A conical surface (506) is provided on the limiting plate (505).
8. A cement production device according to claim 7, characterized in that, An air cavity (508) is provided in the flow guiding plate (507). Exhaust holes (509) are provided on the air cavity (508). The air cavity (508) is connected to an air pump device.
9. A cement production device according to claim 8, characterized in that, Multiple positioning rods (510) are fixedly installed on the extension plate (503). Guide wheels (511) are rotatably installed on the positioning rods (510). A guiding groove is provided in the grinding box (101). The guide wheels (511) are located inside the guiding groove.
10. A cement production method applied to the cement production device according to any one of claims 2-9, the method comprising the following steps: Step 1: Put blast furnace slag and fly ash into the grinding box (101) through the feeding port (102) for grinding. After grinding, part of the limestone is replaced, reducing the calcination requirement to reduce carbon emissions; Step 2: Drive the grinding disc (3) to rotate through a reduction motor. When the grinding disc (3) rotates, the grinding roller (4) is driven to rotate passively by friction, forming a rolling effect on the material; Step 3: The material that has not contacted the grinding roller (4) and has separated from the grinding disc under the action of centrifugal force passes through the separating ring (5), the accelerating ring (501) and the flow guiding plate (507) and returns to the upper part of the grinding disc (3) after passing through the two air holes (7) back and forth; Step 4: Rising gas is blown out from the air holes (7), driving the dust passing above the air holes (7) to rise to the powder separator (2). The qualified dust will be collected, and the unqualified dust will return to the grinding disc (3) to continue grinding; Step 5: Block the materials with larger volume by the limiting rods (6) to prevent the separating ring (5), the accelerating ring (501) and the flow guiding plate (507) from smoothly guiding the materials with larger volume and gravity to the grinding disc (3); Step 6: Through the material return module, the material attached to the limiting rod (6) under the action of centrifugal force is pushed back to the center of the grinding disc (3) again, preventing the grinding roller (4) from directly contacting the limiting rod (6) and reducing the wear of the grinding roller (4).