A raw material impurity removal device for cement grinding aid production

Abstract

This utility model relates to the field of cement grinding aid production technology, specifically to a raw material impurity removal device for cement grinding aid production. The utility model includes a permanent magnet separator and a drum. The surface of the permanent magnet separator is equipped with a feed inlet and a discharge outlet. A vibration device is provided on the surface of the discharge outlet. The vibration device includes a support plate, which is fixedly connected to the surface of the discharge outlet. Two L-shaped plates are fixedly connected to the surface of the support plate. A motor is fixedly connected to one side of the two L-shaped plates that are close to each other. A rotating shaft is fixedly connected to the output end of the motor. A fixed column is fixedly connected to one end of the rotating shaft. Both ends of the fixed column have circular grooves. This invention solves the problem that during the cement grinding aid raw material impurity removal process, the raw material separated by the permanent magnet separator accumulates at the discharge outlet due to humidity, viscosity, or interparticle interaction, leading to outlet blockage.

Description

Technical Field

[0001] This utility model relates to the field of cement grinding aid production technology, and in particular to a raw material impurity removal device for cement grinding aid production. Background Technology

[0002] The raw material impurity removal device for cement grinding aid production is a specialized piece of equipment used in the cement grinding aid production process to remove impurities from raw materials, such as metal particles, sand, fibers, plastics, and other foreign objects. In the cement production field, cement grinding aids can effectively improve grinding efficiency and reduce energy consumption. Its production quality is closely related to the purity of the raw materials. Therefore, the raw material impurity removal device has become a key piece of equipment in cement grinding aid production. Common impurity removal devices usually include permanent magnet separators and drums. The permanent magnet separator is used to separate ferromagnetic impurities in the raw materials, while the drum further completes the screening and processing of the raw materials. However, existing raw material impurity removal devices for cement grinding aid production have significant defects in practical applications. The raw materials separated by the permanent magnet separator often have high moisture content and viscosity, or the interaction between particles during transportation, which easily leads to accumulation at the discharge port. Once the discharge port is blocked, it will not only cause the raw material transportation to be interrupted, reducing production efficiency and increasing downtime cleaning costs, but may also cause overload pressure on equipment such as permanent magnet separators and drums, accelerating equipment wear and shortening equipment life.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: during the process of removing impurities from cement grinding aid raw materials, the raw materials separated by the permanent magnet separator will accumulate at the discharge port due to humidity, viscosity or inter-particle interaction, resulting in discharge port blockage; therefore, in order to address the above problems, a raw material impurity removal device for cement grinding aid production is proposed. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing technology, during the process of removing impurities from cement grinding aid raw materials, the raw materials separated by permanent magnet separators will accumulate at the discharge port due to humidity, viscosity, or interparticle interaction, leading to discharge port blockage. Therefore, this invention proposes a raw material impurity removal device for cement grinding aid production.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a raw material impurity removal device for cement grinding aid production, comprising a permanent magnet separator and a drum. The permanent magnet separator has a feed inlet and a discharge outlet. A vibration device is provided on the surface of the discharge outlet. The vibration device includes a support plate, which is fixedly connected to the surface of the discharge outlet. Two L-shaped plates are fixedly connected to the surface of the support plate. A motor is fixedly connected to one side of the two L-shaped plates that are close to each other. A rotating shaft is fixedly connected to the output end of the motor. A fixed column is fixedly connected to one end of the rotating shaft. Both ends of the fixed column have circular grooves. A striking rod is slidably connected to the inner wall of the circular groove of the fixed column. A vibrating head is fixedly connected to one end of the striking rod. A through hole is formed on the arc surface of the striking rod. Two threaded rods pass through the internal thread of the fixed column. The threaded rods are threadedly connected to the inner wall of the through hole of the striking rod. A circular plate is fixedly connected to one end of the threaded rod. The arc surface of the vibrating head is slidably connected to the discharge outlet. The striking rod and the vibrating head are made of elastic material.

[0006] The aforementioned components achieve the following effects: by setting up a vibration device, the discharge port is prevented from becoming clogged. The motor drives the rotating shaft, which in turn drives the fixed column, striking rod, and vibrating head to vibrate at high frequency, continuously striking the inner wall of the discharge port. This prevents the attached or accumulated material from staying at the discharge port and keeps it in a flowing state, thus ensuring smooth discharge and significantly improving production continuity and stability. It also avoids the situation where, during the impurity removal process of cement grinding aid raw materials, the raw materials separated by the permanent magnet separator accumulate at the discharge port due to humidity, viscosity, or interparticle interaction, leading to discharge port blockage.

[0007] Preferably, the arc surface of the striking rod has two adjustment holes, and the adjustment holes are threadedly connected to the threaded surface of the threaded rod.

[0008] The effect achieved by the above components is as follows: by setting the adjustment hole, the length of the striking rod extending out of the fixed column can be adjusted to change the striking force of the vibrating head. When the striking force is stronger, it can effectively shake off materials with strong adhesion and compacted accumulation. When the striking force is weaker, it is suitable for processing materials with looser texture and easy flow, avoiding excessive vibration from damaging the discharge port and materials.

[0009] Preferably, the circular plate has a plurality of anti-slip grooves on its arc surface, and the plurality of anti-slip grooves are evenly distributed on the circular plate in a circumferential array.

[0010] The effect achieved by the above-mentioned components is as follows: by setting anti-slip grooves, the roughness of the surface of the round plate is increased, which effectively increases the friction between the hand and the round plate, avoids slippage, makes the adjustment operation smoother and more stable, and significantly improves the grip experience and operation accuracy during the adjustment process.

[0011] Preferably, the inner wall of the fixed column groove is rotatably connected with a plurality of ball bearings, and the arc surface of the ball bearings is slidably connected to the striking rod.

[0012] The effect achieved by the above components is as follows: by setting ball bearings, the sliding friction between the striking rod and the groove of the fixed column is transformed into rolling friction, which reduces the friction between the striking rod and the fixed column, making the sliding of the striking rod in the groove smoother and reducing wear between components.

[0013] Preferably, the inner wall of the feed inlet is provided with a filtering device, the filtering device including a filter screen, the filter screen being fixedly connected to the inner wall of the feed inlet, the surface of the feed inlet having an elongated hole, the surface of the feed inlet having two sliding grooves, the inner walls of the two sliding grooves being fixedly connected to two sliding rods, the arc surfaces of the two sliding rods being slidably connected to baffles, the surface of the feed inlet having two slots, the baffles having two screws threadedly inserted into their internal threads, the screws being threadedly connected to the inner wall of the feed inlet slots, and the size of the baffles being larger than the size of the elongated hole.

[0014] The aforementioned components achieve the following effects: By setting up a filtration device, the screen aperture size is precisely designed to effectively intercept large particles of impurities such as sand, wood chips, and plastic fragments in the material. This prevents these impurities from entering subsequent impurity removal stages, where they would be difficult to process effectively by the permanent magnet separator and drum, thus affecting the performance of cement grinding aids. The combination structure of baffles, slide bars, and screws provides the filtration device with convenient cleaning and maintenance functions. When too many impurities are trapped on the surface of the filter screen, affecting the filtration effect, operators do not need to use complicated tools. They can simply unscrew the screw and slide the baffle along the slide bar to quickly open the elongated hole and clean the filter screen, improving equipment operation and maintenance efficiency.

[0015] Preferably, two connecting plates are fixedly connected to the surface of the baffle, and a handle is fixedly connected to one side of the two connecting plates that are close to each other.

[0016] The effect achieved by the above components is that when cleaning and maintaining the filter device, the operator can easily and stably slide the baffle along the slide bar by holding the handle. Compared with directly pushing the baffle, the handle provides a larger force application area and a more ergonomic grip point, reducing discomfort during operation.

[0017] Preferably, a sealing gasket is fixedly connected to the surface of the baffle, the sealing gasket is slidably connected to the surface of the feed inlet, and the size of the sealing gasket is larger than the size of the baffle.

[0018] The effect achieved by the above components is as follows: by setting a sealing gasket, the sealing gasket is tightly fitted to the surface of the feed inlet, and its size is larger than that of the baffle, so as to completely cover the gap between the baffle and the feed inlet. During the conveying of cement grinding aid raw materials, it effectively prevents some fine raw material particles from leaking out from the gap.

[0019] The beneficial effects of this utility model are: 1. In this utility model, by setting a vibration device, the effect of preventing the discharge port from being blocked is achieved. The motor drives the rotating shaft, which drives the fixed column, the striking rod, and the vibrating head to vibrate at high frequency, continuously striking the inner wall of the discharge port. This prevents the attached or accumulated material from staying at the discharge port and keeps it in a flowing state, thereby ensuring smooth discharge and significantly improving the continuity and stability of production. It also avoids the situation where the raw materials separated by the permanent magnet separator during the cement grinding aid raw material impurity removal process will accumulate at the discharge port due to humidity, viscosity, or inter-particle interaction, leading to discharge port blockage.

[0020] 2. In this utility model, by setting up a filtration device, the screen aperture size is precisely designed to effectively intercept large particles of impurities such as sand, gravel, wood chips, and plastic fragments in the material. This avoids the situation where these impurities, if they enter the subsequent impurity removal process, are difficult to be effectively processed by the permanent magnet separator and drum, thus affecting the performance of the cement grinding aid. The combination structure of baffle, slide bar, and screw gives the filtration device convenient cleaning and maintenance functions. When too many impurities are trapped on the surface of the filter screen and affect the filtration effect, the operator does not need to use complicated tools. He only needs to unscrew the screw and slide the baffle along the slide bar to quickly open the elongated hole to clean the filter screen, thus improving the efficiency of equipment operation and maintenance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the vibration device in this utility model; Figure 3 This is a partial structural schematic diagram of the vibration device in this utility model; Figure 4 This is a partial structural diagram of the vibration device in this utility model; Figure 5 This is a schematic diagram of the filtration device in this utility model; Figure 6 This is a schematic diagram of the elongated hole in this utility model; Figure 7 This is a partial structural diagram of the filtration device in this utility model.

[0022] Legend: 1. Permanent magnet magnetic separator; 2. Drum; 3. Feed inlet; 4. Discharge outlet; 5. Vibration device; 501. Support plate; 502. L-shaped plate; 503. Motor; 504. Rotating shaft; 505. Fixed column; 506. Striking rod; 507. Vibrating head; 508. Threaded rod; 509. Circular plate; 510. Anti-slip groove; 511. Adjustment hole; 512. Ball bearing; 6. Filter device; 61. Filter screen; 62. Slide groove; 63. Slide rod; 64. Long hole; 65. Baffle; 66. Screw; 67. Sealing gasket; 68. Connecting plate; 69. Handle. Detailed Implementation

[0023] Reference Figure 1 , Figure 2 and Figure 5 As shown, this utility model provides a technical solution: a raw material impurity removal device for cement grinding aid production, including a permanent magnet separator 1 and a drum 2. A feed inlet 3 and a discharge outlet 4 are installed on the surface of the permanent magnet separator 1. A vibration device 5 is provided on the surface of the discharge outlet 4. By setting the vibration device 5, the discharge outlet 4 is prevented from becoming clogged. A motor 503 drives a rotating shaft 504, which in turn drives a fixed column 505, a striking rod 506, and a vibrating head 507 to vibrate at high frequency, continuously striking the inner wall of the discharge outlet 4. This prevents adhered or accumulated materials from remaining at the discharge outlet 4, maintaining a constant flow and ensuring smooth discharge. This significantly improves production continuity and stability, and avoids the problem of raw materials separated by the permanent magnet separator 1 becoming clogged due to moisture, viscosity, or particle size during the cement grinding aid raw material impurity removal process. The interaction between the particles causes accumulation at the discharge port 4, leading to blockage. The inner wall of the inlet 3 is equipped with a filter device 6. By setting the filter device 6, the screen hole size is precisely designed to effectively intercept large particles such as sand, gravel, wood chips, and plastic fragments in the material. This prevents these impurities from entering the subsequent impurity removal process and being difficult to be effectively processed by the permanent magnet separator 1 and the drum 2, thus affecting the performance of the cement grinding aid. The combination structure of baffle 65, slide bar 63, and screw 66 gives the filter device 6 convenient cleaning and maintenance functions. When too many impurities are trapped on the surface of the filter screen 61 and affect the filtration effect, the operator does not need to use complicated tools. He only needs to unscrew the screw 66 and slide the baffle 65 along the slide bar 63 to quickly open the elongated hole 64 to clean the filter screen 61, improving the efficiency of equipment operation and maintenance.

[0024] The specific setup and function of the vibration device 5 and the filter device 6 will be described in detail below.

[0025] Reference Figure 2 , Figure 3 and Figure 4As shown in this embodiment: the vibration device 5 includes a support plate 501, which is fixedly connected to the surface of the discharge port 4. Two L-shaped plates 502 are fixedly connected to the surface of the support plate 501. A motor 503 is fixedly connected to one side of the two L-shaped plates 502 that are close to each other. A rotating shaft 504 is fixedly connected to the output end of the motor 503. A fixing column 505 is fixedly connected to one end of the rotating shaft 504. Circular grooves are opened at both ends of the fixing column 505. A striking rod 506 is slidably connected to the inner wall of the circular groove of the fixing column 505. A vibrating head 50 is fixedly connected to one end of the striking rod 506. 7. The arc surface of the striking rod 506 has a through hole. Two threaded rods 508 pass through the internal thread of the fixing post 505. The threaded rods 508 are threadedly connected to the inner wall of the through hole of the striking rod 506. One end of the threaded rod 508 is fixedly connected to a circular plate 509. The arc surface of the vibrating head 507 is slidably connected to the discharge port 4. The striking rod 506 and the vibrating head 507 are made of elastic material. The arc surface of the striking rod 506 has two adjustment holes 511. The adjustment holes 511 are threadedly connected to the threaded surfaces of the threaded rods 508. By setting the adjustment holes 511, the extension of the striking rod 506 can be adjusted. The length of the fixed column 505 is used to change the impact force of the vibrating head 507. A stronger impact force can effectively shake off highly adhesive and tightly packed materials, while a weaker impact force is suitable for handling looser, more flowable materials, avoiding excessive vibration that could damage the discharge port 4 and the materials. The circular plate 509 has several anti-slip grooves 510 on its arc surface, evenly distributed in a circumferential array. These grooves increase the surface roughness of the plate 509, effectively increasing the friction between the hand and the plate. This design effectively prevents slippage, making the adjustment operation smoother and more stable, and significantly improving the grip experience and operational precision during the adjustment process. Several ball bearings 512 are rotatably connected to the inner wall of the circular groove of the fixed post 505. The arc surface of the ball bearings 512 is slidably connected to the striking rod 506. By setting the ball bearings 512, the sliding friction between the striking rod 506 and the circular groove of the fixed post 505 is transformed into rolling friction, reducing the friction between the striking rod 506 and the fixed post 505. This makes the sliding of the striking rod 506 in the circular groove smoother and reduces wear between components.

[0026] Reference Figure 5 , Figure 6 and Figure 7As shown, specifically, the filter device 6 includes a filter screen 61, which is fixedly connected to the inner wall of the feed inlet 3. An elongated hole 64 is formed on the surface of the feed inlet 3. Two sliding grooves 62 are formed on the surface of the feed inlet 3. Two sliding rods 63 are fixedly connected to the inner walls of the two sliding grooves 62. A baffle 65 is slidably connected to the arc surface of the two sliding rods 63. Two slots are formed on the surface of the feed inlet 3. Two screws 66 are threaded into the baffle 65, and the screws 66 are threadedly connected to the inner wall of the slots in the feed inlet 3. The size of the baffle 65 is larger than the size of the elongated hole 64. Two connecting plates 68 are fixedly connected to the surface of the baffle 65. A handle 69 is fixedly connected to the side of the two connecting plates 68 that is close to each other, thus enabling easy operation when cleaning and maintaining the filter device 6. By holding the handle 69, the operator can easily and stably slide the baffle 65 along the slide bar 63. Compared with directly pushing the baffle 65, the handle 69 provides a larger force application area and a more ergonomic grip point, reducing discomfort during operation. A sealing gasket 67 is fixedly connected to the surface of the baffle 65. The sealing gasket 67 is slidably connected to the surface of the feed inlet 3. The size of the sealing gasket 67 is larger than that of the baffle 65. By setting the sealing gasket 67, the sealing gasket 67 is tightly fitted to the surface of the feed inlet 3, and its size is larger than that of the baffle 65, which can completely cover the gap between the baffle 65 and the feed inlet 3. During the conveying of cement grinding aid raw materials, it effectively prevents some fine raw material particles from leaking out from the gap.

[0027] Working principle: When the vibration device 5 is needed, the motor 503 between the two L-shaped plates 502 on the support plate 501 is started. After the motor 503 starts, its output end drives the rotating shaft 504 to rotate at high speed, which in turn drives the fixed column 505, which is fixedly connected to one end of the rotating shaft 504, to rotate synchronously. During the rotation of the fixed column 505, since the striking rod 506 is fixed in the circular groove of the fixed column 505 through the threaded rod 508, the striking rod 506 and the vibrating head 507 are driven to rotate, so that the vibrating head 507 is in continuous contact with the surface of the discharge port 4. As the fixed column 505 rotates continuously, the vibrating head 507 continuously strikes the inner wall of the discharge port 4, generating high-frequency vibration. The movement keeps the material in the discharge port 4 flowing, preventing material accumulation. When the striking force of the vibrating head 507 needs to be adjusted to adapt to the processing requirements of different raw materials, the operator rotates the circular plate 509. The anti-slip groove 510 on the circular plate 509 increases the friction between the hand and the circular plate 509, preventing slippage and making the adjustment operation smoother and more stable. The circular plate 509 drives the threaded rod 508 to rotate within the fixed column 505, and then rotates out from the through hole of the striking rod 506, releasing the fixation of the striking rod 506. Then, according to the characteristics of the raw material, the threaded rod 508 is aligned with one of the adjustment holes 511. The threaded rod 508 is then rotated to allow... The threaded rod 508 is rotated into the adjusting hole 511 to fix the striking rod 506, thereby changing the length of the striking rod 506 extending out of the fixed post 505, and thus adjusting the striking force of the vibrating head 507. A stronger striking force can effectively shake off highly adhesive and tightly packed materials, while a weaker striking force is suitable for handling looser, more flowable materials. During this process, the ball bearings 512 rotatably connected to the inner wall of the circular groove of the fixed post 505 will contact the arc surface of the striking rod 506, causing rotation. This converts the original sliding friction between the striking rod 506 and the fixed post 505 into rolling friction, significantly reducing motion resistance, allowing the striking rod 506 to move more smoothly within the circular groove. Smoother sliding reduces wear between components. By setting up a vibration device 5, the blockage of the discharge port 4 is prevented. The motor 503 drives the rotating shaft 504, which in turn drives the fixed column 505, the striking rod 506, and the vibrating head 507 to vibrate at high frequency, continuously striking the inner wall of the discharge port 4. This prevents the attached or accumulated material from staying at the discharge port 4 and keeps it in a flowing state, thus ensuring smooth discharge and significantly improving production continuity and stability. This avoids the situation where the raw materials separated by the permanent magnet separator 1 accumulate at the discharge port 4 due to humidity, viscosity, or interparticle interaction during the impurity removal process of cement grinding aid raw materials, causing blockage of the discharge port 4.

[0028] Working principle: The cement grinding aid raw material to be purified is conveyed by external conveying equipment to the feed inlet 3 on the surface of the permanent magnet separator 1. The filter screen 61, which is fixedly connected to the inner wall of the feed inlet 3, immediately comes into play. The filter screen 61 is customized with screen hole size according to the characteristics of the cement grinding aid raw material and the adaptation requirements of subsequent purification equipment. It can accurately intercept large particles of impurities such as sand, gravel, wood chips, and plastic fragments in the material. This prevents these impurities from entering the subsequent purification process and being difficult to be effectively processed by the permanent magnet separator 1 and the drum 2, thus affecting the performance of the cement grinding aid. This provides a purer raw material for the subsequent purification process, reduces the workload of the core equipment, and allows for continuous production. As the process continues, the impurities trapped on the surface of the filter screen 61 gradually increase. When this affects the filtration efficiency, timely cleaning is necessary. The operator first unscrews the screw 66 threaded into the slot of the feed inlet 3. After the screw 66 is unscrewed from the slot, the baffle 65 loses its fixed restraint and slides along the arc surface of the slide rod 63 within the slide groove 62 under the influence of gravity until the baffle 65 slides away from the elongated hole 64, completely exposing the filter screen 61. At this point, the operator can quickly clean the impurities trapped on the surface of the filter screen 61 through the elongated hole 64. After cleaning, the operator holds the handle 69, which is fixedly connected between the two connecting plates 68, and uses... The ergonomic design provides a comfortable grip and stable support, easily pushing the baffle 65 back to its original position along the slide bar 63, allowing it to cover the elongated hole 64 again. Then, screw the screw 66 into the feed inlet 3 slot, connecting it to the threaded connection of the baffle 65. Tightening the screw 66 secures the baffle 65 to the feed inlet 3, restoring the filter device 6 to normal operation. During this process, the sealing gasket 67 fits tightly against the surface of the feed inlet 3 and is larger than the baffle 65, completely covering the gap between the baffle 65 and the feed inlet 3, preventing fine raw material particles from leaking out. By setting up the filter device 6, the required screen aperture size is achieved. The precise design effectively intercepts large particles of impurities such as sand, wood chips, and plastic fragments in materials, preventing these impurities from being effectively processed by the permanent magnet separator 1 and drum 2 if they enter subsequent impurity removal stages, thus affecting the performance of cement grinding aids. The combined structure of baffle 65, slide bar 63, and screw 66 provides convenient cleaning and maintenance functions for the filter device 6. When too many impurities are trapped on the surface of the filter screen 61, affecting the filtration effect, the operator does not need to use complicated tools. Simply unscrew the screw 66 and slide the baffle 65 along the slide bar 63 to quickly open the elongated hole 64 to clean the filter screen 61, improving the efficiency of equipment operation and maintenance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A cement grinding aid production raw material impurity removal device, comprising a permanent magnet separator (1) and a roller (2), characterized in that: The permanent magnet separator (1) has a feed inlet (3) and a discharge outlet (4) on its surface. A vibration device (5) is provided on the surface of the discharge outlet (4). The vibration device (5) includes a support plate (501), which is fixedly connected to the surface of the discharge outlet (4). Two L-shaped plates (502) are fixedly connected to the surface of the support plate (501). A motor (503) is fixedly connected to one side of the two L-shaped plates (502) that are close to each other. A rotating shaft (504) is fixedly connected to the output end of the motor (503). A fixed column (505) is fixedly connected to one end of the rotating shaft (504). Both ends of the fixed column (505) are provided with circular grooves. The inner wall of the circular groove of the fixed column (505) is slidably connected to a striking rod (506). One end of the striking rod (506) is fixedly connected to a vibrating head (507). The arc surface of the striking rod (506) is provided with a through hole. Two threaded rods (508) are threaded through the fixed column (505). The threaded rods (508) are threadedly connected to the inner wall of the through hole of the striking rod (506). One end of the threaded rod (508) is fixedly connected to a circular plate (509). The arc surface of the vibrating head (507) is slidably connected to the discharge port (4). The striking rod (506) and the vibrating head (507) are made of elastic material.

2. The raw material impurity removal device for cement grinding aid production according to claim 1, characterized in that: The striking rod (506) has two adjustment holes (511) on its arc surface, and the adjustment holes (511) are threadedly connected to the threaded surface of the threaded rod (508).

3. The raw material impurity removal device for cement grinding aid production according to claim 1, characterized in that: The circular plate (509) has a plurality of anti-slip grooves (510) on its arc surface, and the plurality of anti-slip grooves (510) are evenly distributed in a circumferential array on the circular plate (509).

4. The raw material impurity removal device for cement grinding aid production according to claim 1, characterized in that: The inner wall of the groove of the fixed column (505) is rotatably connected with a number of balls (512), and the arc surface of the balls (512) is slidably connected to the striking rod (506).

5. The raw material impurity removal device for cement grinding aid production according to claim 1, characterized in that: The inner wall of the feed inlet (3) is provided with a filter device (6), the filter device (6) includes a filter screen (61), the filter screen (61) is fixedly connected to the inner wall of the feed inlet (3), the surface of the feed inlet (3) is provided with an elongated hole (64), the surface of the feed inlet (3) is provided with two sliding grooves (62), the inner walls of the two sliding grooves (62) are fixedly connected with two sliding rods (63), the arc surfaces of the two sliding rods (63) are slidably connected with baffles (65), the surface of the feed inlet (3) is provided with two slots, the baffles (65) are threadedly inserted with two screws (66), the screws (66) are threadedly connected to the inner wall of the slots of the feed inlet (3), and the size of the baffles (65) is larger than the size of the elongated hole (64).

6. The raw material impurity removal device for cement grinding aid production of claim 5, characterized in that: Two connecting plates (68) are fixedly connected to the surface of the baffle (65), and a handle (69) is fixedly connected to the side of the two connecting plates (68) that are close to each other.

7. The raw material impurity removal device for cement grinding aid production according to claim 5, characterized in that: The surface of the baffle (65) is fixedly connected with a sealing gasket (67), the sealing gasket (67) is slidably connected with the surface of the feed inlet (3), and the size of the sealing gasket (67) is greater than that of the baffle (65).

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