Cement grinding mill

Abstract

The utility model relates to a cement production technology, and discloses a cement grinding mill. In the use process, materials evenly enter the first grinding bin through feeding equipment, steel balls of different specifications are contained in the first grinding bin, and the materials are clicked and ground; after being roughly ground in the first grinding bin, the materials enter the second grinding bin through the bin partition grid plate of the double-layer bin partition plate to be further ground; when the barrel is driven by mill driving equipment to rotate, the milling medium is attached to the activated lining plate surface of the inner wall of the barrel to rotate together with the activated lining plate surface under the action of inertia centrifugal force, and freely falls down under the action of gravity after being brought to a certain height, at the moment, materials in the barrel are crushed by the milling medium, and meanwhile, the milling medium does circular motion in the rotating barrel except rising and falling. When materials are crushed and ground, the materials can slide and roll, the materials slowly flow from the feeding end to the discharging end while being crushed by impact, and powdery materials are discharged into discharging equipment through the discharging grid plate, so that the grinding operation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, and more specifically, particularly relates to a cement mill. Background Art

[0002] Cement is a building material. After adding water and stirring, it can firmly bond sand and stone materials together. During the production and processing of cement, the particles of the initial cement produced are not fine enough and need to be further processed and ground to produce finished products with fine and uniform particles before they can be used. This ensures the quality of cement products and improves their safety in use in construction.

[0003] Cement mills are required for grinding during cement production to ensure that cement is produced into fine-grained powder. When existing cement mills are in use, due to the high moisture content of some raw materials and high admixture levels, the grate gaps in the cement mill's partitions are often blocked by small steel balls and sticky desulfurization gypsum, reducing the grinding effect. Utility Model Content

[0004] The present application provides a cement mill, which solves the problem that when the existing cement mill is in use, the grate plates of the cement mill partition bins are often blocked by small steel balls and viscous desulfurization gypsum, which reduces the grinding effect, because some raw materials have high moisture content and high admixture.

[0005] The present application provides a cement mill, comprising a cylinder, a feeding device is provided at the front end of the cylinder, a grinding chamber is inside the cylinder, an activated liner is installed in the grinding chamber, the activated liner is an ultra-thin liner, the grinding chamber is composed of a first grinding chamber and a second grinding chamber, a partition plate is provided between the first grinding chamber and the second grinding chamber, a material passing hole is provided on the partition plate, a grate plate is provided behind the partition plate and at the discharge end of the mill, holes of different sizes are provided on the grate plate, and the tail end of the second grinding chamber is connected to the discharge device.

[0006] Preferably, the feeding device is composed of a feed port, a feed pipe and a feed bin.

[0007] Preferably, the grate plate is composed of a partition grate plate and a discharge grate plate, and the grate plate is fixed in the grinding bin by screws, and the partition grate plate and the discharge grate plate are both multi-distributed anti-blocking, anti-wear, small-sized plates.

[0008] Preferably, the cylinder is mounted on mill bearings.

[0009] Preferably, the mill bearing is connected to a mill driving device, which is composed of a high-voltage driving motor, a rotating shaft and a reduction motor.

[0010] Preferably, the discharging device is composed of a discharging bin, a dust collecting port and a discharging port.

[0011] Preferably, the first grinding bin and the second grinding bin contain grinding media of different diameters.

[0012] Preferably, both the first grinding bin and the second grinding bin are provided with grinding doors.

[0013] Preferably, a support platform is installed below the mill drive device and the mill bearing, and the mill drive device and the mill bearing are fixedly installed on the support platform.

[0014] Preferably, the feed pipe is fixed on a support frame, and the support frame is fixedly mounted on the support platform.

[0015] It can be seen from the above technical scheme that the present application provides a cement mill. When in use, the material enters the first grinding bin evenly from the feeding equipment. The first grinding bin is filled with steel balls of different specifications. The rotation of the cylinder generates centrifugal force to bring the grinding medium to a certain height and then drop it, producing a heavy impact and grinding effect on the material. After the material is coarsely ground in the first grinding chamber, it enters the second grinding chamber through the grate plate of the double-layer partition plate. The second grinding chamber contains grinding media of different specifications smaller than those of the first grinding chamber, which further grinds the material. When the cylinder is driven to rotate by the mill driving device, the grinding media adheres to the activated lining surface of the inner wall of the cylinder due to the action of inertial centrifugal force and rotates with it. After being brought to a certain height, it falls freely due to gravity. At this time, the grinding media crushes the material in the cylinder. At the same time, in addition to the rising and falling cyclic motion of the grinding media in the rotating cylinder, it also slides and rolls, causing grinding between the grinding media, the activated lining and the ground material to grind the material. While the material is being impacted, crushed and ground, the material slowly flows from the feed end to the discharge end, and the powder is discharged to the discharge equipment through the discharge grate plate to complete the grinding operation.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model drives the cylinder to stir cement through the mill driving device. Under the action of centrifugal force, the grinding medium is brought to a certain height and then falls, which produces a heavy impact and grinding effect on the material. Small particles of powder enter the second grinding chamber through the holes of the partition plate and the holes of the partition grate plate. Large particles of material cannot pass through the holes of the partition plate and are continuously ground by the partition plate in the first grinding chamber, thereby improving the grinding efficiency.

[0018] 2. The utility model improves the original thick and large-size grate plates or blind plates of the inner and middle circles of the partition grate plates by using wear-resistant, thin, small-sized and multi-distributed discharge grate plates and partition grate plates with anti-blocking effects, and improves the grate plates at the discharge end of the mill by using ultra-thin anti-blocking grate plates, thereby avoiding the situation in which the grate gaps of the cement mill partition grate plates are often blocked by small steel balls and viscous desulfurization gypsum due to the high moisture content and high admixture of some raw materials.

[0019] In summary, a cement mill drives the cylinder to stir cement through the mill driving device, and under the action of centrifugal force, the grinding medium is brought to a certain height and then falls, which produces a heavy impact and grinding effect on the material. Small particle powder enters the second grinding chamber through the material passing holes of the partition plate and the holes of the partition grate plate. Large particle materials cannot pass through the holes of the partition plate and are continued to be ground by the partition plate in the first grinding chamber, thereby improving the grinding efficiency. In addition, by using wear-resistant, thin, small-sized and multi-distributed discharge grate plates and partition grate plates with anti-blocking effects, the original thick and large-sized grate plates or blind plates of the inner and middle circles of the partition grate plates are improved, and the grate plates at the discharge end of the mill are improved with ultra-thin anti-blocking grate plates, thereby avoiding the situation that the grate gaps of the cement mill partition grate plates are often blocked by small steel balls and viscous desulfurization gypsum due to the high moisture content and high admixture of some raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0021] Figure 1 A structural schematic diagram of a cement mill provided by the utility model;

[0022] Figure 2 A structural schematic diagram of a cement grinding grate plate provided by the utility model;

[0023] Figure 3 A structural schematic diagram of a cement mill partition plate provided by the utility model;

[0024] Figure 4 The utility model is a structural schematic diagram of a cement mill activation liner provided by the utility model.

[0025] The reference numerals in the specific implementation manner are as follows:

[0026] 1. Cylinder; 2. Grinding chamber; 201. First grinding chamber; 202. Second grinding chamber; 3. Feeding equipment; 301. Feeding port; 302. Feeding pipe; 303. Feeding chamber; 4. Grate plate; 401. Partition grate plate; 402. Discharging grate plate; 5. Holes; 6. Partition plate; 7. Feeding hole; 8. Activated lining plate; 9. Mill driving equipment; 901. High-voltage driving motor; 902. Rotating shaft; 903. Speed ​​reducer motor; 10. Mill bearing; 11. Discharging equipment; 1101. Discharging chamber; 1102. Dust collecting port; 1103. Discharging port; 12. Grinding medium; 13. Grinding door; 14. Screws; 15. Support frame; 16. Support table. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] See also Figure 1-4 , a cement mill, in order to solve the problem that when the existing cement mill is in use, the grate plate of the cement mill partition bin is often blocked by small steel balls and sticky desulfurized gypsum due to the high moisture content of some raw materials and the high admixture, thereby reducing its grinding effect, a cement mill is proposed, which drives the cylinder to stir the cement through the mill driving device, and under the action of centrifugal force, the grinding medium is brought to a certain height and then falls, which produces a heavy impact and grinding effect on the material, and the small particle powder enters the second grinding through the material passing hole of the partition board and the holes of the partition grate board. In the bin, large particles of material cannot pass through the holes of the partition plate and are continued to be ground by the partition plate in the first grinding bin, thereby improving the grinding efficiency. In addition, by using wear-resistant, thin, small-sized, and multi-distributed discharge grate plates and partition grate plates with anti-blocking effects, the original thick and large-sized grate plates or blind plates of the inner and middle circles of the partition grate plates are improved, and the grate plates at the discharge end of the mill are improved with ultra-thin anti-blocking grate plates. This avoids the situation in which the grate gaps of the cement mill partition grate plates are often blocked by small steel balls and viscous desulfurization gypsum due to the high moisture content and high admixture of some raw materials. Specifically, a cement mill includes a cylinder 1, which is mounted on a mill bearing 10, and the mill bearing 10 is connected to a mill drive device 9. A support platform 16 is installed below the mill drive device 9 and the mill bearing 10, and the mill drive device 9 and the mill bearing 10 are fixedly mounted on the support platform 16, which plays a stabilizing role for the entire device. The mill drive device 9 is composed of a high-voltage drive motor 901, a rotating shaft 902 and a reduction motor 903. The high-voltage drive motor 901 drives the inside of the mill bearing 10 to rotate, and at the same time drives the cylinder 1 to rotate. When cement is stirred, the grinding medium 12 is brought to a certain height and then falls down under the action of centrifugal force, which produces a heavy impact and grinding effect on the material; a feeding device 3 is provided at the front end of the cylinder 1, and the feeding device 3 is composed of a feed port 301, a feed pipe 302 and a feed bin 303. The material enters the feed bin 303 from the feed port 301 through the feed pipe 302, and enters the cylinder 1 from the feed bin 303; the feed pipe 302 is fixed on the support frame 15, and the support frame 15 is fixedly installed on the support platform 16, and the support frame 15 plays a fixing role on the feed pipe 302.

[0029] The interior of the cylinder 1 is a grinding chamber 2, in which an activated liner 8 is installed. The activated liner 8 is an ultra-thin liner, which can increase the inner diameter of the mill, increase the inner diameter of the cylinder, reduce the weight, and reduce power consumption; the grinding chamber 2 is composed of a first grinding chamber 201 and a second grinding chamber 202. The first grinding chamber 201 and the second grinding chamber 202 have grinding media 12 of different diameters, and the grinding media 12 are steel balls of different diameters; when the cylinder 1 is driven to rotate by the mill driving device 9, the grinding media 12 adheres to the inner wall of the cylinder 1 due to the action of inertial centrifugal force. The material is brought to a certain height by the lining plate 8, and then falls freely due to gravity. The material enters the first grinding bin 201 evenly from the feeding device 3. The first grinding bin 201 is filled with steel balls of different specifications. The rotation of the cylinder 1 generates centrifugal force to bring the grinding medium 12 to a certain height and then falls, which has a heavy impact and grinding effect on the material. A partition plate 6 is provided between the first grinding bin 201 and the second grinding bin 202, and a material passing hole 7 is provided on the partition plate 6. A grate plate 4 is provided behind the partition plate 6 and at the discharge end of the mill. The holes 5 of different sizes are arranged. After the material is roughly ground in the first grinding chamber 201, the small-particle powder enters the second grinding chamber 202 through the material passing hole 7 of the partition plate 6 and the holes 5 of the partition grate plate 401. The large-particle material cannot pass through the holes 5 of the partition plate 6 and is continuously ground by the partition plate 6 in the first grinding chamber 201. The second grinding chamber 202 has a grinding medium 12 of different specifications smaller than that of the first grinding chamber 201, which further grinds the material and improves the grinding efficiency. The grate plate 4 is composed of the partition grate plate 401 and the discharge grate plate 402. The grate plate 401 of the partition chamber and the discharge grate plate 402 are both multi-distributed anti-blocking, wear-resistant and small-sized plates. The original thick large-sized grate plate 4 or blind plate of the inner circle and the middle circle of the partition grate plate 401 is improved, and the discharge grate plate 402 in the mill is improved with an ultra-thin anti-blocking grate plate 4, so as to avoid the situation that the grate seams of the cement mill partition chamber grate plate 401 are often blocked by small steel balls and viscous desulfurization gypsum due to the high moisture content and high admixture of some raw materials.

[0030] The tail end of the second grinding bin 202 is connected to the discharging device 11, and the grinding medium 12 crushes the material in the cylinder 1. At the same time, in addition to the rising and falling cyclic motion, the grinding medium 12 in the rotating cylinder 1 also slides and rolls, causing a grinding action between the grinding medium 12, the activated liner 8 and the ground material to grind the material. While the material is being impacted, crushed and ground, the material slowly flows from the feed end to the discharge end, and the powder is discharged into the discharging device 11 through the discharging grate plate 402, completing the grinding operation; the discharging device 11 is composed of a discharging bin 1101, a dust collecting port 1102 and a discharging port 1103. After the grinding is completed, the powdered material that meets the standards enters the discharging bin 1101. The dust collecting port 1102 is used to extract dust and also forms a negative pressure in the mill to facilitate material movement. The material is discharged into the air chute along the discharging port 1103, and then enters the powder classifier through the elevator for powder selection.

[0031] In some embodiments, grinding doors 13 are provided on both the first grinding bin 201 and the second grinding bin 202 . Grinding doors 13 are provided on the side walls of the first grinding bin 201 and the second grinding bin 202 , respectively, to facilitate cleaning, inspection and maintenance of the first grinding bin 201 and the second grinding bin 202 .

[0032] From the above technical scheme, it can be seen that when a cement mill is used, the material is evenly fed into the first grinding bin 201 by the feeding device 3. The first grinding bin 201 is filled with steel balls of different specifications. The cylinder 1 rotates to generate centrifugal force to bring the grinding medium 12 to a certain height and then fall down, which produces a heavy impact and grinding effect on the material. After the material is roughly ground in the first grinding chamber 201, it enters the second grinding chamber 202 through the partition grate 401 of the double partition plate 6. The second grinding chamber 202 contains grinding media 12 of different specifications smaller than those of the first grinding chamber 201, which further grinds the material. When the cylinder 1 is driven to rotate by the mill driving device 9, the grinding media 12 adheres to the surface of the activated liner 8 on the inner wall of the cylinder 1 due to the action of inertial centrifugal force and rotates with it. After being brought to a certain height, it falls freely due to the action of gravity. At this time, the grinding media 12 crushes the material in the cylinder 1. At the same time, in addition to the rising and falling cyclic motion of the grinding media 12 in the rotating cylinder 1, it also slides and rolls, causing a grinding action between the grinding media 12, the activated liner 8 and the ground material to grind the material. While the material is being impacted, crushed and ground, the material slowly flows from the feed end to the discharge end, and the powder is discharged into the discharge device 11 through the discharge grate 402 to complete the grinding operation.

[0033] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the application disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art disclosed by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0034] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A cement mill, characterized in that: The invention comprises a cylinder (1), wherein a feeding device (3) is provided at the front end of the cylinder (1), a grinding chamber (2) is inside the cylinder (1), an activation liner (8) is installed in the grinding chamber (2), and the activation liner (8) is an ultra-thin liner. The grinding chamber (2) is composed of a first grinding chamber (201) and a second grinding chamber (202), wherein a partition plate (6) is provided between the first grinding chamber (201) and the second grinding chamber (202), wherein a material passing hole (7) is provided on the partition plate (6), and a grate plate (4) is provided behind the partition plate (6) and at the discharge end of the mill, wherein holes (5) of different sizes are provided on the grate plate (4), and the tail end of the second grinding chamber (202) is connected to the discharge device (11).

2. A cement mill according to claim 1, characterized in that: The feeding device (3) is composed of a feeding port (301), a feeding pipe (302) and a feeding bin (303).

3. A cement mill according to claim 1, characterized in that: The grate plate (4) is composed of a partition grate plate (401) and a discharge grate plate (402), and the grate plate (4) is fixed in the grinding chamber (2) by means of screws (14), and the partition grate plate (401) and the discharge grate plate (402) are both multi-distributed anti-blocking, anti-wear, and small-sized plates.

4. A cement mill according to claim 2, characterized in that: The cylinder (1) is mounted on a mill bearing (10).

5. A cement mill according to claim 4, characterized in that: The mill bearing (10) is connected to a mill driving device (9), which is composed of a high-voltage driving motor (901), a rotating shaft (902) and a reduction motor (903).

6. A cement mill according to claim 1, characterized in that: The discharging device (11) is composed of a discharging bin (1101), a dust collecting port (1102) and a discharging port (1103).

7. A cement mill according to claim 1, characterized in that: The first grinding chamber (201) and the second grinding chamber (202) contain grinding media (12) of different diameters.

8. A cement mill according to claim 1, characterized in that: The first grinding bin (201) and the second grinding bin (202) are both provided with grinding doors (13).

9. A cement mill according to claim 5, characterized in that: A support platform (16) is installed below the mill drive device (9) and the mill bearing (10), and the mill drive device (9) and the mill bearing (10) are fixedly installed on the support platform (16).

10. A cement mill according to claim 9, characterized in that: The feed pipe (302) is fixed on a support frame (15), and the support frame (15) is fixedly mounted on the support platform (16).

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