Wear-resistant ball mill for ceramic production

Abstract

The invention discloses a wear-resistant ball mill for ceramic production, the wear-resistant ball mill comprises a barrel, a carrier roller mechanism and a driving mechanism, the driving mechanism drives the barrel to rotate on the carrier roller mechanism, a stirring barrel is tangentially and fixedly arranged on the inner wall of the barrel, the stirring barrel and the barrel are arranged in the same direction, a first lining plate is arranged in the barrel, and a second lining plate is arranged in the barrel. An outer lining plate is arranged outside the stirring barrel, a second inner lining plate is arranged in the stirring barrel, a material passing mechanism which only allows the barrel body to perform one-way feeding into the stirring barrel is arranged on the stirring barrel, and grinding balls are arranged in the barrel body and the stirring barrel. According to the lining plate, the problem that targeted impact on large-particle materials is weak is solved, and the service life of the lining plate is prolonged.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and in particular to a wear-resistant ball mill for ceramic production. Background Technology

[0002] The grinding equipment used in ceramic production is usually a drum ball mill. Its principle is to use the cylinder to carry the grinding balls to a high place, and then "throw" them down along a parabolic trajectory. The falling grinding media will generate strong impact and collision on the material at the bottom, while also rolling and sliding, to achieve efficient grinding by combining impact crushing and rolling grinding.

[0003] Patent application number 201410816942.7 discloses a high-efficiency ball mill with an arc-shaped liner. A primary screening grinding screen is installed at the center of the cylinder to initially screen different particles. Large particles are retained in the primary screening grinding screen for the first grinding stage, and then, after becoming fine powder, enter the space between the cylinder and the primary screening grinding screen for a second grinding stage. This separation and grinding of different particle sizes improves grinding efficiency. However, this device abandons the important high-speed impact crushing function of a drum ball mill, relying solely on rolling friction to reduce particle size. This process is time-consuming and severely compromises the wear resistance of the internal liner, shortening its service life. How to increase the targeted impact crushing of large particles by the grinding balls is a crucial method to simultaneously improve grinding efficiency and the lifespan of the internal liner, and it is also a challenge in the development of drum ball mills. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wear-resistant ball mill for ceramic production, so as to solve the problem that the existing drum ball mill has weak targeted impact on large particles and relies heavily on the sliding friction of the inner liner.

[0005] The objective of this invention is achieved through the following technical solution: A wear-resistant ball mill for ceramic production, comprising a cylinder, a roller mechanism, and a drive mechanism, wherein the drive mechanism drives the cylinder to rotate on the roller mechanism, a stirring cylinder is tangentially fixed to the inner wall of the cylinder, the stirring cylinder is arranged in the same direction as the cylinder, a first inner liner plate is provided inside the cylinder, an outer liner plate is provided outside the stirring cylinder, a second inner liner plate is provided inside the stirring cylinder, a material feeding mechanism is provided on the stirring cylinder that only allows the cylinder to feed material into the stirring cylinder in one direction, and grinding balls are provided inside both the cylinder and the stirring cylinder.

[0006] The mixing drum is tangentially installed inside the cylinder, allowing it to rotate with the cylinder. Because the mixing drum protrudes significantly inward compared to the first inner liner plate, it can lift more grinding balls and raise them to a greater height, resulting in stronger impact performance. When the mixing drum rotates to the bottom of the cylinder, the fine powder that has been crushed by the impact can enter the mixing drum through the material hole, achieving the separation of fine materials and the enrichment of coarse materials. This ensures that the downward-thrown grinding balls always impact large particles, making it more targeted. The separated fine materials are further rolled and ground into smaller particles under the action of the grinding balls.

[0007] Preferably, the mixing drum is provided with a mixing shaft, and a mixing blade for mixing the grinding balls is fixed on the mixing shaft. One end of the drum is provided with a feed sealing plate, and the center of the feed sealing plate is provided with a feed inlet. The other end of the drum is provided with a discharge sealing plate, and the discharge sealing plate is provided with a discharge cylinder connected to the mixing drum. A ball baffle is provided inside the discharge cylinder, and the ball baffle is provided with sieve holes. The mixing shaft passes through and rotatably connects the feed sealing plate and the ball baffle.

[0008] Preferably, the sieve holes are arranged around the center of the baffle plate, and an overflow baffle is provided inside the discharge cylinder, with the center of the overflow baffle being the discharge hole.

[0009] Preferably, the feed sealing plate is concentrically provided with an outer ring, an inner gear ring is sleeved inside the outer ring, a connecting plate is fixedly provided on the inner gear ring, the connecting plate is fixedly connected to the roller mechanism, the outer ring is rotatably connected to the inner gear ring, an amplifying gear is provided on the feed sealing plate, the amplifying gear meshes with the inner gear ring, and a transmission gear meshes with the amplifying gear is provided on the stirring shaft.

[0010] Preferably, the material feeding mechanism includes a sliding column, the stirring cylinder is provided with a plurality of material holes, the material holes pass through the second inner liner plate, the stirring cylinder and the outer liner plate in sequence, the sliding column is located in the material holes, the stirring cylinder is provided with a wire passing chamber, the sliding column is provided with a T-shaped material passing channel, the middle part of the sliding column is provided with a magnet, the wire passing chamber is provided with an electromagnetic coil, and the electromagnetic coil surrounds the sliding column.

[0011] Preferably, one end of the material hole is a large conical opening, the other end of the material hole is a small conical opening, the sliding column matches the material hole, and the lateral portion of the material passage is located within the large conical opening.

[0012] Preferably, the wire passage chamber is provided with a baffle tube, which is fitted outside the sliding column and located inside the electromagnetic coil. The baffle tube is slidably connected to the sliding column, and both ends of the baffle tube are respectively sealed and connected to the material hole.

[0013] Preferably, the cylinder is fitted with an annular non-conductive slide rail, the slide rail is provided with a matching electric slider, and a grounding plate is arranged around the slide rail. The grounding plates are not connected end to end and are arranged side by side. The grounding plates are electrically connected to the electromagnetic coil. The grounding plates are divided into short wires and long wires, which are arranged alternately. The short wires are located directly below the stirring cylinder.

[0014] Preferably, the electric slider is located directly above the cylinder, a support plate is fixedly provided on the electric slider, the support plate is fixedly connected to the roller mechanism, and the electric slider is provided with a C-shaped spring piece that is electrically connected to the electrode plate.

[0015] The present invention has the following advantages: 1. By installing a unidirectional feed and discharge mixing drum tangentially inside the cylinder, not only is the height of the grinding balls lifted increased, improving the impact crushing ability, but also the fine powder is separated from the large particles in time, improving the targeted impact of the grinding balls on the large particles, and improving the ball mill efficiency and the wear resistance of the internal liner. 2. By designing an alternating short and long line connection structure on the cylinder body, the rotation of the cylinder body itself is linked to achieve a mechanized change in the current direction of the electromagnetic coil and precise control of the timing. Furthermore, in conjunction with the sliding column, the opening and closing of the material passage can be quickly controlled by changing the positive and negative poles of the current, thereby achieving precise control of the unidirectional feeding and discharging function of the mixing cylinder and ensuring the normal operation of the entire system. 3. By introducing a stirring rod into the mixing drum, the advantages of the stirring ball mill are brought into the drum ball mill, which can make the particle size distribution of the produced powder more concentrated, the particle morphology more regular, and improve the quality of the ball-milled product. 4. By designing an internal gear ring, enlarged gear, and transmission gear structure on the cylinder, the rotation of the cylinder itself provides sufficient power to the stirring shaft, eliminating the need for additional power. 5. This device combines the advantages of a drum ball mill and a stirred ball mill. The first step utilizes the advantages of the drum ball mill for impact crushing, and the second step utilizes the advantages of the stirred ball mill for efficient grinding. By fully leveraging the advantages of each, the quality of the final product is improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the feed end of the present invention; Figure 2 This is a schematic diagram of the right-side structure of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional structure of the discharge end of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a front view schematic diagram of the electric slider structure of the present invention; Figure 6 yes Figure 4 A schematic diagram of a partial cross-sectional view at point A in the middle.

[0017] In the diagram, 1. Cylinder; 2. Roller mechanism; 3. Drive mechanism; 4. First inner liner plate; 5. Mixing cylinder; 6. Material hole; 7. Feed sealing plate; 8. Discharge sealing plate; 9. Mixing shaft; 10. Mixing blade; 11. Feed inlet; 12. Enlarging gear; 13. Transmission gear; 14. Internal gear ring; 15. Outer ring; 16. Connecting plate; 17. Discharge cylinder; 18. Baffle plate; 19. Screen hole; 20. Overflow baffle; 21. Discharge hole; 22. Wire passage chamber; 23. Support column; 24. Second inner liner plate; 25. Outer liner plate; 26. Large conical opening; 27. Small conical opening; 28. Sliding column; 29. ​​Material passage; 30. Magnet; 31. Baffle tube; 32. Electromagnetic coil; 33. Slide rail; 34. Electric slider; 35. Spring; 36. Short wire; 37. Long wire; 38. Support plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a wear-resistant ball mill for ceramic production is a drum-type ball mill, comprising a cylinder 1, a roller mechanism 2, and a drive mechanism 3. The roller mechanism 2 consists of two sets that support the cylinder 1 respectively. The drive mechanism 3 is a structure consisting of a motor, a reducer, and gears. Of course, other methods can also be used to drive the cylinder 1 to rotate. Both the roller mechanism and the drive mechanism 3 are existing technologies. The drive mechanism 3 drives the cylinder 1 to rotate on the roller mechanism 2. A stirring cylinder 5 is tangentially fixedly installed on the inner wall of the cylinder 1. There are two stirring cylinders 5, and the length of the stirring cylinder 5 is the same as that of the cylinder 1. The two stirring cylinders 5 are arranged opposite each other and are both arranged in the same direction as the cylinder 1. Multiple first inner liner plates 4 are installed inside the cylinder 1, multiple outer liner plates 25 are installed outside the stirring cylinder 5, and multiple second inner liner plates 24 are installed inside the stirring cylinder 5. Multiple grinding balls are placed inside both the cylinder 1 and the stirring cylinder 5. The diameter of the grinding balls inside the cylinder 1 is larger than the diameter of the grinding balls in the stirring cylinder 5.

[0020] A material feeding mechanism is provided on the mixing drum 5, which allows only one-way feeding of material from the drum body 1 into the mixing drum 5. This one-way material feeding mechanism can be implemented in various structures. In this invention, an electromagnetically controlled sliding column 28 is used to open and close the material feeding channel 29. The specific structure is as follows: like Figure 6As shown, a material hole 6 is provided on the mixing drum 5. The mixing drum 5 has an inner and outer two-layer structure, forming a wire-passing chamber 22 inside. The wire-passing chamber 22 is supported by multiple support columns 23. The material hole 6 passes through the second inner liner plate 24, the mixing drum 5, and the outer liner plate 25 in sequence. One end of the material hole 6 is a large conical opening 26, and the other end is a small conical opening 27. A sliding column 28 is installed inside the material hole 6. The length of the sliding column 28 is greater than the length of the material hole 6, and the shape of the sliding column 28 matches the material hole 6. The sliding column 28 has a conical structure with a large end and a small end, which allows it to be restricted to a certain distance during sliding. To prevent the material from sliding out of the material hole 6, the large end and the small end are fitted together with the large conical opening 26 or the small conical opening 27, so that they do not protrude relative to the second inner liner plate 24 and the outer liner plate 25. This prevents the sliding column 28 from sliding due to the impact of the grinding ball. The sliding column 28 is provided with a T-shaped material passage 29. The horizontal part of the material passage 29 is located in the large conical opening 26 and passes through the arc surface of the large end of the sliding column 28. The vertical part of the material passage 29 passes vertically through the bottom surface of the small end. The vertical part of the material passage 29 is the feed port, and the horizontal part is the discharge channel. The large end of the sliding column 28 is tightly fitted with the large conical opening 26 to block the feed.

[0021] Multiple elongated magnets 30 are installed in the middle of the sliding column 28. The magnets 30 are embedded in the sliding column 28 in the same direction. Multiple baffle tubes 31 are installed in the wire passage chamber 22. Each baffle tube 31 is matched with a material hole 6. The two ends of the baffle tube 31 are respectively sealed and connected to the material hole 6. Multiple electromagnetic coils 32 are installed in the wire passage chamber 22. The electromagnetic coils 32 surround the sliding column 28. The baffle tubes 31 are fitted outside the sliding column 28 and located inside the electromagnetic coils 32. The baffle tubes 31 are slidably connected to the sliding column 28. The electromagnetic coils 32 are connected in series. The electromagnetic coils 32 are connected to a DC power source outside the cylinder 1 to generate an induced magnetic field inside.

[0022] External devices of electromagnetic coil 32, such as Figure 5As shown, a ring-shaped non-conductive slide rail 33 is fitted onto the cylinder 1. The slide rail 33 can be made of resin material. A grounding plate is embedded in the slide rail 33. The ratio of the number of grounding plates to the number of mixing cylinders 5 is 2:1. The grounding plates are not connected end-to-end and are installed side-by-side in parallel. The grounding plates are electrically connected to an electromagnetic coil 32. The grounding plates consist of short wires 36 and long wires 37, which are alternately arranged to switch the positive and negative poles of the current during rotation. The short wire 36 is located directly below the mixing cylinder 5. The short wire 36 is positioned between the short wire 36 and the long wire 37. The length ratio is 3:1. The positional relationship between the short line 36 and the long line 37 changes according to the position of the corresponding matching stirring drum 5. The slide rail 33 is equipped with a matching electric slider 34. The electric slider 34 is equipped with a terminal block connected to DC power. The electric slider 34 is equipped with a C-shaped spring piece 35 that is matched with the junction plate and the terminal block for electrical connection. The spring piece 35 can be electrically connected by slightly pressing the junction plate with a copper sheet. The electric slider 34 is located directly above the drum 1. The electric slider 34 is connected to the roller mechanism 2 through the installed support plate 38.

[0023] Compared to stirred ball mills, drum ball mills produce particles with a wider particle size distribution and more irregular particle morphology.

[0024] like Figure 3 , 4 As shown, a stirring shaft 9 is installed inside the stirring drum 5, and stirring blades 10 for stirring the grinding balls are fixedly installed on the stirring shaft 9. A feed sealing plate 7 is installed at one end of the drum body 1, and a feed inlet 11 is opened at the center of the feed sealing plate 7. The feed sealing plate 7 also seals one end of the stirring drum 5. A discharge sealing plate 8 is installed at the other end of the drum body 1. A discharge cylinder 17 connected to the stirring drum 5 is provided on the discharge sealing plate 8. A baffle plate 18 is installed inside the discharge cylinder 17. Multiple circular sieve holes 19 are opened on the baffle plate 18. The sieve holes 19 are arranged around the center of the baffle plate 18 and distributed along the edge of the baffle plate 18. The stirring shaft 9 passes through and rotates to connect the feed sealing plate 7 and the baffle plate 18. An overflow baffle 20 is connected inside the discharge cylinder 17. The center of the overflow baffle 20 is the discharge hole 21. After the powder passes through the circular sieve holes 19 and accumulates to a certain height, it is discharged from the discharge hole 21.

[0025] like Figure 2As shown, the rotation of the stirring shaft 9 depends on external power input. Direct drive by the motor would cause the motor to rotate with the cylinder 1, which would not only affect the motor but also cause winding problems during rotation. An outer ring 15 is concentrically mounted on the feed sealing plate 7, and an inner gear ring 14 is rotatably mounted inside the outer ring 15. A connecting plate 16 is welded to the lower part of the inner gear ring 14, and the connecting plate 16 is directly fixed to the support base of the roller mechanism 2. An amplifying gear 12 is mounted on the feed sealing plate 7, and the amplifying gear 12 meshes with the inner gear ring 14. A transmission gear 13 that meshes with the amplifying gear 12 is mounted on the stirring shaft 9. The rotation of the cylinder 1 itself causes the amplifying gear 12 to rotate relative to the inner gear ring 14, thereby driving the stirring shaft 9 to rotate. This converts multiple power inputs into the input of a single drive mechanism 3. The rotation speed of the cylinder 1 itself is low, but the setting of the amplifying gear 12 can amplify the rotation speed to drive the stirring shaft 9 to stir.

[0026] Working principle: The drive mechanism 3 causes the cylinder 1 to rotate on the roller mechanism 2. On one hand, the amplifying gear 12 revolves under the drive of the cylinder 1. Due to the meshing restriction of the internal gear ring 14, it is driven to rotate on its own axis. Under the action of the transmission gear 13, it drives the stirring shaft 9 and the stirring blade 10 to rotate, stirring the grinding balls in the stirring drum 5. On the other hand, after the cylinder 1 rotates, the stirring drum 5 is driven to revolve. The stirring drum 5 lifts and throws the grinding balls in the cylinder 1 downward, impacting and crushing the large particles fed into the feed inlet 11. When the stirring drum 5 rotates to the lowest point of the cylinder 1, the direct current is connected to the short wire 36 through the terminal and spring 35 on the electric slider 34. The short wire 36 introduces the current into the electromagnetic coil 32 to generate a magnetic field, driving the large end of the sliding column 28 away from the large conical opening 26. The material passage 29 is opened, and the small particles impacted enter the mixing drum 5 through the material passage 29. As the mixing drum 5 rotates further, the contact between the spring 35 and the short wire 36 changes to the contact with the long wire 37, changing the direction of the current in the electromagnetic coil 32. This causes the sliding column 28 to change its sliding direction from away from the large conical opening 26 to close to the large conical opening 26, thus sealing the material passage 29. The small particles in the mixing drum 5 will not leak out from the inside after being further ground. This sealed state lasts for 3 / 4 of a cycle until the mixing drum 5 reaches its lowest point again. The material passage 29 will then be reopened to feed material. When there are too many fine particles in the mixing drum 5, they will flow to the overflow baffle 20 through the sieve holes 19 on the baffle plate 18. When the powder exceeds the lowest point of the discharge hole 21, automatic discharge can be achieved.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant ball mill for ceramic production, comprising a barrel (1), a roller support mechanism (2), a drive mechanism (3) that drives the barrel (1) to rotate on the roller support mechanism (2), characterized in that: The tangential fixedly provided stirring drum (5) is provided on the inner wall of the barrel (1), the stirring drum (5) is provided in the same direction with the barrel (1), the first inner lining plate (4) is provided in the barrel (1), the outer lining plate (25) is provided outside the stirring drum (5), the second inner lining plate (24) is provided inside the stirring drum (5), the material passing mechanism allowing only the barrel (1) to pass into the stirring drum (5) in one direction is provided on the stirring drum (5), and the grinding balls are provided in the barrel (1) and the stirring drum (5).

2. A ceramic production attrition ball mill as claimed in claim 1, wherein: The stirring shaft (9) is provided in the stirring drum (5), the stirring blade (10) for stirring the grinding balls is fixedly provided on the stirring shaft (9), one end of the barrel (1) is provided with the feeding sealing plate (7), the center of the feeding sealing plate (7) is provided with the feeding port (11), the other end of the barrel (1) is provided with the discharging sealing plate (8), the discharging barrel (17) connected with the stirring drum (5) is provided on the discharging sealing plate (8), the ball blocking plate (18) is provided in the discharging barrel (17), the sieve hole (19) is provided on the ball blocking plate (18), and the stirring shaft (9) penetrates and rotationally connects the feeding sealing plate (7) and the ball blocking plate (18) respectively.

3. A ceramic production attrition ball mill as claimed in claim 2, wherein: The sieve hole (19) is provided around the center of the ball blocking plate (18), the overflow blocking plate (20) is provided in the discharging barrel (17), and the center of the overflow blocking plate (20) is the discharging hole (21).

4. A ball mill for ceramic production according to claim 2, characterized in that: The outer ring (15) is concentrically provided on the feeding sealing plate (7), the inner gear ring (14) is sleeved in the outer ring (15), the connecting plate (16) is fixedly provided on the inner gear ring (14), the connecting plate (16) is fixedly connected with the supporting roller mechanism (2), the outer ring (15) is rotationally connected with the inner gear ring (14), the amplification gear (12) is provided on the feeding sealing plate (7), the amplification gear (12) is meshingly connected with the inner gear ring (14), and the transmission gear (13) meshingly connected with the amplification gear (12) is provided on the stirring shaft (9).

5. A ceramic production attrition ball mill as claimed in claim 1, wherein: The material passing mechanism comprises a sliding column (28), a plurality of material holes (6) are provided on the stirring drum (5), the material holes (6) sequentially penetrate the second inner lining plate (24), the stirring drum (5) and the outer lining plate (25), the sliding column (28) is located in the material hole (6), the wire passing cavity (22) is provided in the stirring drum (5), the T-shaped material passing channel (29) is provided in the sliding column (28), the magnet (30) is provided in the middle part of the sliding column (28), the electromagnetic coil (32) is provided in the wire passing cavity (22), and the electromagnetic coil (32) surrounds the sliding column (28).

6. A ceramic production attrition ball mill as claimed in claim 5, wherein: One end of the material hole (6) is a large conical opening (26), the other end of the material hole (6) is a small conical opening (27), the sliding column (28) is matched with the material hole (6), and the transverse part of the material passing channel (29) is located in the large conical opening (26).

7. A ceramic production attrition ball mill as claimed in claim 5, wherein: The overline chamber (22) is provided with a material blocking pipe (31), the material blocking pipe (31) is sleeved outside the sliding column (28) and is located in the electromagnetic coil (32), the material blocking pipe (31) is slidingly connected with the sliding column (28), and both ends of the material blocking pipe (31) are sealingly connected with the material hole (6).

8. A ceramic production attrition ball mill as claimed in claim 6, wherein: The barrel (1) is sleeved with an annular non-conductive sliding rail (33), the sliding rail (33) is provided with an electric sliding block (34) matched with the sliding rail (33), the sliding rail (33) is provided with an electric connection plate around, the electric connection plate is not connected at the head and tail and is arranged side by side, the electric connection plate is electrically connected with the electromagnetic coil (32), the electric connection plate is divided into a short line (36) and a long line (37), the short line (36) and the long line (37) are arranged alternately, and the short line (36) is located directly below the stirring barrel (5).

9. A ceramic production attrition ball mill as claimed in claim 8, wherein: The electric sliding block (34) is located directly above the barrel (1), the electric sliding block (34) is fixedly provided with a support plate (38), the support plate (38) is fixedly connected with the supporting roller mechanism (2), and the electric sliding block (34) is provided with a C-shaped elastic sheet (35) matched with the electric connection plate and electrically connected with the electric connection plate.

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