A ball mill

Abstract

The application discloses a ball mill, which comprises a supporting base, a barrel horizontally placed on the supporting base and capable of rotating around its own axis on the supporting base, a fine grinding barrel horizontally placed and fixed in the barrel, a plurality of fine feeding holes being formed in the barrel wall of the fine grinding barrel, a discharge port extending out of the end of the barrel being arranged at one end of the fine grinding barrel, a screen being arranged at the discharge port, a plurality of coarse grinding barrels being horizontally placed and distributed around the fine grinding barrel, the coarse grinding barrels being rotatably installed in the barrel, a plurality of coarse feeding holes being formed in the barrel wall of the coarse grinding barrel, a first driving mechanism for driving the barrel to rotate around its own axis, and a second driving mechanism for driving each coarse grinding barrel to rotate around its own axis. The ball mill of the application can greatly improve the utilization of the space of the ball mill, improve the grinding efficiency, and reduce the impact force of the ball stones on the barrel wall by arranging the coarse grinding barrels and the fine grinding barrel.

Description

Technical Field

[0001] This invention relates to the field of ceramic raw material preparation technology, and in particular to a ball mill. Background Technology

[0002] Ball mills are key equipment for wet grinding of ceramic aggregates after crushing. Most existing wet ball mills are drum-type, with a certain number of grinding balls inside the drum as grinding media. The rotation of the drum generates centrifugal force, lifting the grinding balls to a certain height before they fall, impacting the aggregates and producing a ceramic slurry with specific performance characteristics through wet grinding. However, this method results in low space utilization and low efficiency due to the small space occupied by the slurry and grinding balls inside the drum. Furthermore, the impact force of the falling grinding balls on the drum wall is significant, leading to easy wear and tear, shortened service life, and high maintenance costs. Therefore, there is a need to develop a new, high-efficiency ball mill. Summary of the Invention

[0003] To address the above shortcomings, this invention provides a ball mill that can solve the problems of low space utilization, low efficiency, and high impact on the cylinder wall of existing ball mills.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A ball mill, comprising:

[0006] Support base;

[0007] A cylindrical body, which is placed horizontally on the support and is able to rotate about its own axis on the support;

[0008] A fine grinding barrel is horizontally placed and fixed inside the cylinder. The cylinder wall of the fine grinding barrel has multiple fine feed holes. One end of the fine grinding barrel is provided with a discharge port extending out of the end of the cylinder. A screen is provided at the discharge port.

[0009] Multiple coarse grinding barrels are arranged horizontally and distributed around a fine grinding barrel. The coarse grinding barrels are rotatably installed inside the barrel. The barrel wall of the coarse grinding barrel has multiple coarse feed holes.

[0010] A first driving mechanism is used to drive the cylinder to rotate about its own axis;

[0011] The second drive mechanism is used to drive each of the coarse grinding barrels to rotate about its own axis.

[0012] Furthermore, the support base includes a magnetic levitation base and a levitation magnetic ring. The levitation magnetic ring is fixedly sleeved on the outer periphery of the cylinder. The magnetic levitation base is located below the levitation magnetic ring. The magnetic levitation base and the levitation magnetic ring have repulsive magnetic forces so that the cylinder can levitate above the magnetic levitation base.

[0013] Furthermore, a groove is provided at the end face of the levitation magnetic ring, and a limiting part located within the groove is provided on the magnetic levitation base.

[0014] Furthermore, the first driving mechanism includes:

[0015] First base;

[0016] The first gear is coaxially sleeved on the outer circumference of the cylinder;

[0017] A first drive motor is fixedly mounted on the first base, and a second gear is fixedly mounted on the output shaft of the first drive motor, the second gear meshing with the first gear.

[0018] Furthermore, the fine grinding barrel is coaxially arranged with the cylinder body, and a plurality of coarse grinding barrels are evenly distributed around the fine grinding barrel;

[0019] The second drive mechanism includes:

[0020] Second base;

[0021] The third gear is located outside one end of the cylinder and is fixedly mounted on one end of each coarse grinding barrel.

[0022] The first rotating shaft is rotatably mounted on the second base and coaxially arranged with the cylinder body;

[0023] The fourth gear is fixedly mounted on the first rotating shaft and meshes with each of the third gears;

[0024] The fifth gear is fixedly mounted on the first rotating shaft;

[0025] The second drive motor is fixedly mounted on the second base, and a sixth gear is fixedly mounted on the output shaft of the second drive motor, the sixth gear meshing with the fifth gear.

[0026] Furthermore, the second drive mechanism also includes an internal gear ring, which is arranged around the periphery of each of the third gears and meshes with each of the third gears.

[0027] Furthermore, both ends of the coarse grinding barrel are connected to the cylinder body via sealed bearing components.

[0028] Furthermore, the side wall of the cylinder is provided with a feed inlet and a first ball stone removal and placement port, the feed inlet is provided with a feed inlet cap, and the first ball stone removal and placement port is provided with a first ball stone removal and placement port cap.

[0029] Furthermore, the wall of the fine grinding barrel is provided with a second ball stone inlet, and a second ball stone inlet cap is provided on the second ball stone inlet.

[0030] Furthermore, the wall of the coarse grinding barrel is provided with a third ball stone inlet, and a third ball stone inlet cap is provided on the third ball stone inlet.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. The ball mill of the present invention, by setting up a coarse grinding barrel and a fine grinding barrel, allows the grinding slurry to fill a large amount of the internal space of the barrel and be ground, which greatly improves the utilization of the ball mill space and thus improves the grinding efficiency;

[0033] 2. By setting up coarse grinding barrels and fine grinding barrels, coarse grinding and fine grinding can be achieved in one barrel, which solves the problem of large footprint and complex structure of traditional continuous ball mills. This saves on the use of grinding equipment. The ball mill with staged grinding can simplify the structure and improve space utilization.

[0034] 3. The use of coarse and fine grinding barrels effectively avoids the impact of grinding stones falling from a certain height on the barrel wall, thus effectively protecting the barrel body, extending the service life of the equipment, and reducing maintenance costs.

[0035] 4. The coarse grinding barrel achieves both rotation and revolution simultaneously, which can effectively improve grinding efficiency. Moreover, this method eliminates the need for heavy impact of grinding balls, thereby reducing the pressure on the barrel wall of the ball mill, extending the service life of the equipment, and reducing maintenance costs.

[0036] 5. By utilizing the principle of magnetic levitation, the cylinder can be suspended, solving the problems of difficult speed adjustment and high motor load pressure in traditional ball mills. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0038] Figure 1 This is a schematic diagram of the ball mill of the present invention from one perspective;

[0039] Figure 2 This is a schematic diagram of the ball mill of the present invention from another perspective;

[0040] Figure 3This is a schematic diagram of the structure in which the coarse grinding barrel and the fine grinding barrel are installed on the cylinder body (not shown);

[0041] Figure 4 This is a schematic diagram showing the positions of the coarse grinding barrel and the fine grinding barrel in this invention;

[0042] Figure 5 This is a schematic diagram of the coarse grinding barrel in this invention;

[0043] Figure 6 This is a schematic diagram of the fine grinding barrel in this invention;

[0044] Figure 7 This is a schematic diagram of the structure of the second driving mechanism in this invention (the second base is not shown).

[0045] The markings shown in the figure are as follows: 10-Support base; 11-Magnetic levitation base; 12-Suspension magnetic ring; 13-Ring groove; 14-Limiting part; 20-Cylinder body; 21-Inlet; 22-First ball stone inlet; 23-Inlet cover; 24-First ball stone inlet cover; 30-Coarse grinding barrel; 31-Coarse inlet hole; 32-Third ball stone inlet cover; 40-Fine grinding barrel; 41-Outlet; 42-Screen; 43-Fine inlet hole; 44-Second ball stone inlet cover; 51-First gear; 52-First drive motor; 53-Second gear; 54-First base; 61-Third gear; 62-Second base; 63-First rotating shaft; 64-Fourth gear; 65-Fifth gear; 66-Sixth gear; 67-Second drive motor; 68-Sealed bearing; 69-Bearing; 610-Internal gear ring. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Please refer to Figures 1 to 7 A preferred embodiment of the present invention provides a ball mill, which mainly includes a support base 10, a cylinder 20, a coarse grinding barrel 30, a fine grinding barrel 40, a first driving mechanism, and a second driving mechanism.

[0050] like Figure 1 and Figure 2As shown, the support base 10 is used to support the cylinder 20 and ensure its stability. The cylinder 20 is placed horizontally on the support base 10 and can rotate around its own axis on the support base 10. When the cylinder 20 rotates, the slurry inside it rotates accordingly. In some embodiments, the cylinder 20 is mounted on the support base 10 by bearings or the like to facilitate rotation. In a preferred exemplary embodiment, the support base 10 includes a magnetic levitation base 11 and a levitation magnetic ring 12. The levitation magnetic ring 12 is fixedly sleeved on the outer periphery of the cylinder 20, and the magnetic levitation base 11 is located below the levitation magnetic ring 12. The magnetic levitation base 11 and the levitation magnetic ring 12 have repulsive magnetic forces so that the cylinder 20 can be suspended above the magnetic levitation base 11. The magnets of the magnetic levitation base 11 and the levitation magnetic ring 12 interact with each other, and like poles repel each other. Utilizing this principle, the cylinder 20 can be levitated by the mutual interaction between the levitation magnetic ring 12 and the magnetic levitation base 11. This not only reduces friction and pressure on the cylinder wall during grinding, but also reduces the operating load on the motor, allowing the grinding efficiency of the ball mill to be directly adjusted by regulating the motor speed. Traditional support bases 10 primarily support the cylinder 20 using bearings, which, while enabling rotation, introduce friction, place high demands on the motor's operating load, often requiring a complex reduction gear system, and making it relatively difficult to adjust the cylinder's rotation speed. This invention utilizes the principle of magnetic levitation to levitate the cylinder 20, solving the problems of difficult speed adjustment and high motor load in traditional ball mills. The levitation magnetic ring 12 has annular grooves 13 on both end faces. A limiting part 14 is provided on the magnetic levitation base 11 within the annular grooves 13. The limiting part 14 does not directly contact the annular grooves 13, but is located within them so that it cannot detach. That is, under the combined action of the annular grooves 13 and the limiting part 14, the track action of the magnetic levitation base 11 and the levitation magnetic ring 12 ensures that the cylinder 20 will not derail during rotation, guaranteeing the stability and reliability of the cylinder 20's levitation. The side wall of the cylinder 20 has an inlet 21 and a first ball stone loading / unloading port 22. An inlet cap 23 is fitted onto the inlet 21, and a first ball stone loading / unloading port cap 24 is fitted onto the first ball stone loading / unloading port 22. The inlet cap 23 is detachably bolted to the inlet 21 to seal it. The first ball stone inlet cap 24 is detachably bolted to the first ball stone inlet 22 to seal it. When grouting is required, the inlet cap 23 is removed to allow grout to enter. After grouting, the inlet cap 23 is resealed to seal the inlet 21. When it is necessary to insert or remove balls, the first ball stone inlet cap 24 is removed, allowing balls to enter or be removed.It is worth noting that in the ball mill of the present invention, grinding balls may or may not be placed inside the cylinder 20 (referring to the space excluding the fine grinding barrel 40 and the coarse grinding barrel 30), depending on the actual use. When grinding balls are placed, grinding can be carried out through the grinding balls in this space to improve efficiency. However, placing grinding balls also presents the problem that the grinding balls fall from a height and impact the inner wall of the cylinder 20 or the outer walls of the fine grinding barrel 40 and the coarse grinding barrel 30. The impact force on the cylinder wall is large, the cylinder is easily damaged, and the service life and maintenance costs are short. In this preferred embodiment, the diameter of the cylinder 20 is 3500mm, the length of the cylinder is 6200±20mm, and the actual volume is 60m³. 3 .

[0051] Please refer to Figure 3 , Figure 4 and Figure 6 The fine grinding barrel 40 is horizontally placed and fixed inside the cylinder 20. The fine grinding barrel 40 can rotate together with the cylinder 20. In this preferred exemplary embodiment, the fine grinding barrel 40 and the cylinder 20 are coaxially arranged. The cylinder wall of the fine grinding barrel 40 has multiple fine feed holes 43, which are evenly distributed on the circumferential wall of the fine grinding barrel 40. The fine feed holes 43 are used to allow slurry of a certain particle size to enter; slurry exceeding a certain particle size cannot enter. One end of the fine grinding barrel 40 is provided with a discharge port 41 extending out of the end of the cylinder 20. A screen 42 is provided at the discharge port 41, the aperture of which is smaller than the aperture of the fine feed holes 43, for discharging slurry ground to a certain particle size. In this exemplary embodiment, the fine grinding barrel 40 has a diameter of 1500mm and a length of 6000mm. The discharge port 41 is coaxially arranged and extends out of the barrel body 20. The fine feed hole 43 of the fine grinding barrel 40 has a diameter of 1.5mm, and the screen 42 has a diameter of 0.8mm. A second ball stone inlet / outlet is provided on the barrel wall of the fine grinding barrel 40. A second ball stone inlet / outlet cap 44 is fitted onto the second ball stone inlet / outlet. The second ball stone inlet / outlet cap 44 is detachably installed on the second ball stone inlet / outlet by bolts to seal it. When it is necessary to place balls into the fine grinding barrel 40 or remove balls, the second ball stone inlet / outlet cap 44 is removed, balls are placed or removed, and then the second ball stone inlet / outlet cap 44 is used to seal it again. The second ball stone inlet / outlet and the first ball stone inlet / outlet are arranged opposite each other to facilitate the placement and removal of balls. After the pebbles are placed into the fine grinding barrel 40, the fine grinding barrel 40 rotates together with the cylinder 20. When a slurry of a certain particle size enters the fine grinding barrel 40 through the fine feed hole 43, it is finely ground inside the fine grinding barrel 40. After reaching a certain particle size, it can pass through the screen 42 and exit from the discharge port 41.

[0052] Please refer to Figure 3 , Figure 4 and Figure 5Multiple coarse grinding barrels 30 are arranged horizontally. In this preferred exemplary embodiment, there are eight coarse grinding barrels 30, which are evenly distributed around the fine grinding barrel 40. The coarse grinding barrels 30 are rotatably installed inside the cylinder 20. At this time, the coarse grinding barrels 30 can rotate around their own axis and also revolve around the fine grinding barrel 40 following the rotation of the cylinder 20. The cylinder wall of the coarse grinding barrel 30 has multiple coarse feed holes 31, which are evenly distributed on the circumferential cylinder wall of the coarse grinding barrel 30. The coarse feed holes 31 are used to allow slurry of a certain particle size to enter. In this exemplary embodiment, the fine grinding barrel 40 has a diameter of 750 mm and a length of 6000 mm, and the diameter of the coarse feed holes 31 of the coarse grinding barrel 30 is 20 mm. The cylinder wall of the coarse grinding barrel 30 has a third ball stone inlet, and a third ball stone inlet cap 32 is matched on the third ball stone inlet. The third ball stone inlet / outlet cover 32 is detachably installed on the third ball stone inlet / outlet by bolts to seal the inlet. When it is necessary to place balls into the coarse grinding tank 30 or remove balls, the third ball stone inlet / outlet cover 32 is removed, the balls are placed or removed, and then the third ball stone inlet / outlet cover 32 is used to seal the inlet / outlet again. After the balls are placed into the coarse grinding tank 30, the coarse grinding tank 30 rotates on its own axis and rotates with the cylinder 20 to revolve around the fine grinding tank 40. Slurry of a certain particle size enters the coarse grinding tank 30 through the coarse feed hole 31 and undergoes coarse grinding inside the coarse grinding tank 30 to gradually become a finer particle size slurry.

[0053] like Figure 1 and Figure 2 As shown, the first driving mechanism is used to drive the cylinder 20 to rotate around its own axis. The first driving mechanism includes a first base 54, a first gear 51, a first drive motor 52, and a second gear 53. The first base 54 is located next to one end of the cylinder 20; the first gear 51 is coaxially sleeved on the outer periphery of the cylinder 20, using an interference fit so that the first gear 51 can rotate together with the cylinder 20; the first drive motor 52 is fixedly mounted on the first base 54, and the second gear 53 is fixedly mounted on the output shaft of the first drive motor 52. The second gear 53 meshes with the first gear 51. When the first drive motor 52 starts, it can drive the second gear 53 to drive the first gear 51 to rotate, thereby driving the cylinder 20 to rotate around its own axis. At this time, the coarse grinding barrel 30 and the fine grinding barrel 40 on it will also rotate together.

[0054] like Figure 1 , Figure 2 and Figure 7As shown, the second drive mechanism is used to drive each coarse grinding barrel 30 to rotate around its own axis. The second drive mechanism includes a second base 62, a third gear 61, a first rotating shaft 63, a fourth gear 64, a fifth gear 65, a sixth gear 66, and a second drive motor 67. The second base 62 is located next to the other end of the cylinder 20; the third gear 61 is located outside one end of the cylinder 20 and is fixedly mounted on one end of each coarse grinding barrel 30. In this exemplary embodiment, one end of the coarse grinding barrel 30 passes through a connecting shaft, and the third gear 61 is fixedly mounted on the connecting shaft one by one; the first rotating shaft 63 is rotatably mounted on the second base 62 through the bearing 69 and is coaxially mounted with the cylinder 20; the fourth gear 64 is fixedly mounted on the first rotating shaft 63 and meshes with each of the third gears 61; the fifth gear 65 is fixedly mounted on the first rotating shaft 63; the second drive motor 67 is fixedly mounted on the second base 62, and a sixth gear 66 is fixedly mounted on the output shaft of the second drive motor 67, and the sixth gear 66 meshes with the fifth gear 65. Both ends of the coarse grinding barrel 30 are connected to the cylinder 20 via sealed bearing components 68 to ensure smooth rotation of the coarse grinding barrel 30 and to guarantee the tightness of the connection to prevent leakage. In a preferred exemplary embodiment, one end of the coarse grinding barrel 30 extends out of the end of the coarse grinding barrel 30 via a connecting shaft. In this case, the sealed bearing component 68 is mounted on the cylinder 20, and the connecting shaft passes through the sealed bearing component 68. The sealed bearing component 68 includes a bearing body and bearing covers located on both sides. The bearing body is mounted on the cylinder 20, and the bearing covers are sleeved on both sides of the end of the cylinder 20. In a preferred embodiment, the other end of the first rotating shaft 63 is also mounted on the cylinder 20 via the sealed bearing component 68. Furthermore, the second drive mechanism also includes an internal gear ring 610, which is arranged around the periphery of each third gear 61 and meshes with each third gear 61. By setting the internal gear ring 610, the operation of the entire third gear 61, fourth gear 64, etc., is more stable. The third gear 61, the fourth gear 64, and the internal gear ring 610 form a planetary gear structure. When the second drive motor 67 starts, it can drive the sixth gear 66 to rotate, which in turn drives the fifth gear 65 to rotate. The fourth gear 64 rotates at the same time, thereby driving each third gear 61 to rotate and driving each coarse grinding barrel 30 to rotate, so as to realize the rotation of each coarse grinding barrel 30.

[0055] The following is an exemplary implementation process of a more specific embodiment of the present invention:

[0056] Grit stones are placed into the fine grinding tank 40 and the coarse grinding tank 30 respectively. After the slurry enters through the feed inlet 1, the second drive motor 67 rotates at a speed of 30 r / min, driving the sixth gear 66 to rotate. The fifth gear 65 also rotates, driving the fourth gear 64 to rotate. The fourth gear 64 drives each coarse grinding tank 30 to rotate. The coarse grinding tank 30 is filled with 50 mm diameter grit stones. The slurry enters through the 20 mm diameter coarse feed hole 31 of the coarse grinding tank 30 for preliminary coarse grinding. The first drive motor 52 rotates in the opposite direction to the second drive motor 67 at a speed of 15 r / min. The first drive motor 52 drives... The second gear 53 then drives the first gear 51 to rotate, thereby causing the cylinder 20 to rotate around its own axis. At this time, the cylinder 20 and the fine grinding barrel 40 on it rotate. The fine grinding barrel 40 is filled with 40mm diameter pebbles, which are ground to produce a slurry with a particle size of less than 1.5mm. The slurry then enters the fine grinding barrel 40 through the fine feed hole 43 with a diameter of 1.5mm for further fine grinding. At the same time, due to the rotation of the cylinder 20, the coarse grinding barrel 30 is driven to revolve around the fine grinding barrel 40. The coarse grinding barrel 30 not only rotates on its own axis but also revolves around the fine grinding barrel 40. After a certain period of fine grinding, the slurry flows out through the screen 42 with a diameter of 0.8mm at the end, completing the grinding process. The size of the pebbles in the coarse grinding barrel 30 and the speed of the second drive motor 67 can be adjusted according to the grinding needs. The size of the pebbles in the fine grinding barrel 40, the speed of the first drive motor 52, and the aperture of the screen 42 can be adjusted according to the slurry particle size to obtain the desired slurry. The ball mill 20 is suspended by the magnetic levitation support 10, which utilizes the principle of magnetic levitation. This is achieved by the mutual suspension of the magnetic ring 12 and the magnetic levitation base 11. This not only reduces friction and pressure on the ball mill wall during grinding, but also reduces the operating load on the motor. This allows the grinding efficiency of the ball mill to be adjusted directly by regulating the speed of the motor.

[0057] The ball mill of this invention, by setting up a coarse grinding barrel 30 and a fine grinding barrel 40, allows the grinding slurry to fill a large portion of the internal space of the cylinder 20 for grinding, greatly improving the space utilization of the ball mill and thus increasing grinding efficiency. By setting up the coarse grinding barrel 30 and the fine grinding barrel 40, coarse and fine grinding can be achieved within a single cylinder 20, solving the problem of large footprint and complex structure of traditional continuous ball mills, thereby saving on grinding equipment usage. The ball mill using staged grinding simplifies the structure while improving space utilization. The use of a coarse grinding barrel... The design of the 30 and fine grinding barrel 40 effectively avoids the impact of the grinding balls falling from a certain height on the cylinder wall, thus effectively protecting the cylinder 20 and extending the service life of the equipment and reducing maintenance costs. The coarse grinding barrel 30 achieves both rotation and revolution simultaneously, which can effectively improve grinding efficiency. Moreover, this method does not require heavy impact from the grinding balls to achieve grinding, which can improve the cylinder wall pressure of the ball mill, extend the service life of the equipment, and reduce maintenance costs. The use of magnetic levitation principle allows the cylinder 20 to be suspended, solving the problems of difficult speed adjustment and high motor load pressure in traditional ball mills.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A ball mill, characterized in that, Comprise: Support seat (10); Cylinder (20), which is transversely placed on the support seat (10) and can rotate around its own axis on the support seat (10); Fine grinding barrel (40), which is transversely placed and fixed in the cylinder (20), the cylinder wall of the fine grinding barrel (40) is provided with a plurality of fine feeding holes (43); one end of the fine grinding barrel (40) is provided with a discharge port (41) extending out of the end of the cylinder (20), and a screen (42) is arranged at the discharge port (41); A plurality of coarse grinding barrels (30) are transversely arranged, and the plurality of coarse grinding barrels (30) are distributed around the fine grinding barrel (40), and the coarse grinding barrel (30) is rotatably installed in the cylinder (20); the cylinder wall of the coarse grinding barrel (30) is provided with a plurality of coarse feeding holes (31); First driving mechanism for driving the cylinder (20) to rotate around its own axis; Second driving mechanism for driving each coarse grinding barrel (30) to rotate around its own axis; The fine grinding barrel (40) is coaxially arranged with the cylinder (20), and a plurality of coarse grinding barrels (30) are uniformly distributed around the fine grinding barrel (40); The second driving mechanism comprises: Second base (62); Third gear (61) located outside one end of the cylinder (20), and the third gear (61) is fixedly arranged on one end of each coarse grinding barrel (30); First rotating shaft (63) rotatably arranged on the second base (62) and coaxially arranged with the cylinder (20); Fourth gear (64) fixedly installed on the first rotating shaft (63) and engaged with each third gear (61); Fifth gear (65) fixedly installed on the first rotating shaft (63); Second driving motor (67) fixedly installed on the second base (62), and a sixth gear (66) is fixedly installed on the output shaft of the second driving motor (67), and the sixth gear (66) is engaged with the fifth gear (65); The second driving mechanism further comprises an inner gear ring (610) arranged around the periphery of each third gear (61) and engaged with the third gear (61).

2. The ball mill according to claim 1, wherein The support seat (10) comprises a magnetic suspension base (11) and a suspension magnetic ring (12), the suspension magnetic ring (12) is fixedly sleeved on the outer periphery of the cylinder (20), the magnetic suspension base (11) is located below the suspension magnetic ring (12), and the magnetic suspension base (11) and the suspension magnetic ring (12) have repulsive magnetic force to enable the cylinder (20) to be suspended above the magnetic suspension base (11).

3. The ball mill according to claim 2, wherein The end surface of the suspension magnetic ring (12) is provided with a ring groove (13), and the magnetic suspension base (11) is provided with a limiting portion (14) located in the ring groove (13).

4. The ball mill according to claim 1, wherein The first driving mechanism comprises: The first base (54); The first gear (51) is coaxially sleeved on the outer periphery of the barrel (20); The first driving motor (52) is fixedly installed on the first base (54), and a second gear (53) is fixedly installed on the output shaft of the first driving motor (52), and the second gear (53) is engaged with the first gear (51).

5. The ball mill according to claim 1, characterized in that, The two ends of the rough grinding barrel (30) are connected with the barrel (20) through sealing bearing members (68) respectively.

6. The ball mill according to claim 1, characterized in that, The barrel (20) is provided with a feeding port (21) and a first ball stone taking and placing port (22) on the side wall, the feeding port (21) is matched with a feeding port cover (23), and the first ball stone taking and placing port (22) is matched with a first ball stone taking and placing port cover (24).

7. The ball mill according to claim 1, characterized in that, The barrel wall of the fine grinding barrel (40) is provided with a second ball stone taking and placing port, and the second ball stone taking and placing port is matched with a second ball stone taking and placing port cover (44).

8. The ball mill according to claim 1, characterized in that, The barrel wall of the rough grinding barrel (30) is provided with a third ball stone taking and placing port, and the third ball stone taking and placing port is matched with a third ball stone taking and placing port cover (32).

Images