An efficient lithium ore ball mill

Abstract

The present invention discloses an efficient lithium ore ball mill, which relates to the technical field of ball mills and includes a rotating inner cylinder and a movable screening assembly. One end of the axis of the rotating inner cylinder is provided with a communication port. During the use of the present invention, through the linkage cooperation of the movable screening assembly and the reciprocating adjustment assembly, on the one hand, the rotating inner cylinder drives the sieve barrel externally connected at the communication port to rotate synchronously and uniformly through a connecting rod, realizing the particle size screening of the coarsely ground material particles to ensure the uniformity of the particles for subsequent fine grinding. On the other hand, by controlling the change of the inclination angle of the lower inclined plate through a telescopic rod, the sieve barrel not only rotates synchronously with the rotating inner cylinder but also reciprocates in the through hole at the end of the rotating inner cylinder through a connecting rod. Under the action of inertia and centrifugal force, the material blocked in the grid gap is peeled off. In this way, the self-cleaning of the sieve barrel during use can be realized, without the need for shutdown maintenance and dredging, extending the continuous working time of the ball mill to improve the use efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of ball mills, and particularly to an efficient lithium ore ball mill. Background Art

[0002] After being mined, lithium ore is in large chunks. For convenient transportation and subsequent use, it needs to be processed step by step through crushing, grinding, etc. A ball mill is a key device for grinding lithium ore after it has been crushed. In the existing technology, the inside of the ball mill cylinder is equipped with grinding media, which are generally steel balls of different diameters and are loaded into the cylinder in a certain proportion. When the cylinder of the ball mill rotates, due to inertia, centrifugal force, and frictional force, the grinding media adhere to the cylinder liner and are carried away by the cylinder. When they are carried to a certain height, they are dropped due to their own gravity. The falling grinding media act like projectiles to strike and grind the materials inside the cylinder.

[0003] However, when the size of the materials entering the ball mill is relatively large, it takes a longer time to grind to reach the required particle size, which will lead to a reduction in grinding efficiency and an increase in energy consumption, and may also result in uneven particle distribution of the ground materials, affecting product quality.

[0004] Therefore, in view of this, research and improvement are carried out on the deficiencies of the existing structure, and an efficient lithium ore ball mill is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient lithium ore ball mill to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An efficient lithium ore ball mill, including a rotating inner cylinder and a movable screening assembly. One end of the axis of the rotating inner cylinder is provided with a communication port, and through holes are symmetrically opened at the upper and lower ends of the communication port. The movable screening assembly is slidably installed at the end of the rotating inner cylinder. The movable screening assembly includes a screening barrel, a grille, a connecting rod, a return spring, and a ball seat. The inner cavity of the screening barrel is connected to the rotating inner cylinder through the communication port. The grille is circumferentially and arrayedly fixed on the screening barrel, and there are gaps between adjacent grilles. Connecting rods are fixedly installed at both ends on one side of the screening barrel, and the connecting rods are slidably matched with the corresponding through holes. A return spring is sleeved on the connecting rod in the gap between the screening barrel and the rotating inner cylinder. A ball seat is fixedly installed on the outer edge of the other side of the screening barrel, and a movable ball is rotatably installed inside the ball seat.

[0007] Further, grinding rollers are radially surrounded around the outer wall of the rotating inner cylinder, a lining plate is fixedly installed on the inner wall of the rotating inner cylinder, and steel balls are filled in the cavity of the rotating inner cylinder.

[0008] Further, a discharge port is provided at the other end of the axis of the rotating inner cylinder, and the discharge port is connected in series with the wind power system through an air duct so that a negative pressure state is formed in the rotating inner cylinder.

[0009] Further, a gear ring is provided around the outer edge of the discharge port, and the gear ring meshes with the gear at the output end of the driving device to realize rotational transmission.

[0010] Further, a fixed outer cylinder is sleeved outside the rotating inner cylinder, and the axes of the rotating inner cylinder and the fixed outer cylinder coincide and form an angle with the horizontal plane, and one side opening of the fixed outer cylinder is rotationally matched with the rotating inner cylinder through a slewing bearing.

[0011] Further, an air duct is embedded in the inner wall of the fixed outer cylinder, and the inlets and outlets at both sides of the "U" - shaped structure of the air duct are respectively located at the head and tail ends of the axis of the grinding roller.

[0012] Further, a feed inlet is communicated with the side end of the fixed outer cylinder, and the feed inlet is communicated with the lithium ore bin through a feeder.

[0013] Further, an outer lining plate is fixed to the inner wall of the fixed outer cylinder by screws, and an annular channel matching the grinding roller is provided on the inner wall of the outer lining plate.

[0014] Further, a reciprocating adjustment assembly is fixed by screws at the other opening of the fixed outer cylinder. The reciprocating adjustment assembly includes an end cover, a slag discharge port and a telescopic rod. The end cover is fastened to the screw holes reserved at the other opening of the fixed outer cylinder by screws, and a slag discharge port is communicated with the bottom side of the end cover, and a telescopic rod is threadedly connected to the outside of the end cover.

[0015] Further, the reciprocating adjustment assembly further includes a rotating pin and an inclined plate. A rotating pin is fixedly installed inside the end cover, and the rotating pin is rotatably connected to one end of the inclined plate. The other end of the inclined plate abuts against the end of the telescopic rod, and the disk surface of the inclined plate rolls in cooperation with the movable balls in the ball seat.

[0016] The present invention provides an efficient lithium ore ball mill, which has the following beneficial effects;

[0017] 1. During the use of the present invention, the axes of the fixed outer cylinder of the present application and the rotating inner cylinder embedded therein coincide with each other and form an angle with the horizontal plane. On the one hand, the lithium ore materials fall into the annular channel on the inner wall of the fixed outer cylinder under the action of gravity, and then the rotating inner cylinder realizes the rough grinding of the lithium ore materials through the rolling of the grinding rollers radially arranged on the outer edge in the annular channel on the inner wall of the fixed outer cylinder. On the other hand, the outlet of the rotating inner cylinder is connected in series with the wind power system through an air duct, so that the rotating inner cylinder is in a negative pressure state, and the lithium ore materials after rough grinding flow back to the sieve barrel at the head end of the rotating inner cylinder through the air duct. The qualified materials are sucked into the rotating inner cylinder through the grid gaps on the outer edge of the sieve barrel. After that, during the rotation of the rotating inner cylinder, the falling steel balls act on the materials in the cylinder like projectiles, hitting and grinding them to realize the fine grinding of the lithium ore materials. The unqualified materials fall back again for rough grinding until they meet the particle size standard. The present application first rough-grinds the lithium ore materials and then fine-grinds them, which effectively facilitates the grinding of the materials by the ball mill, expands the applicable range of the ball mill, reduces the grinding time of the materials, improves the grinding efficiency, reduces the equipment energy consumption, and the lithium ore materials after rough grinding are screened, which is beneficial to controlling the particle size and uniformity of the materials and further optimizing the grinding effect.

[0018] 2. During the use of the present invention, through the linkage cooperation of the movable screening assembly and the reciprocating adjustment assembly, on the one hand, the rotating inner cylinder drives the sieve barrel connected to the communication port through the connecting rod to rotate synchronously and uniformly, realizing the particle size screening of the materials after rough grinding to ensure the particle uniformity of the subsequent fine grinding. On the other hand, by controlling the change of the inclination angle of the inclined plate through the telescopic rod, the sieve barrel not only rotates synchronously with the rotating inner cylinder but also reciprocates in the through hole at the end of the rotating inner cylinder through the connecting rod. Under the action of inertia and centrifugal force, the materials blocked in the grid gaps are peeled off, so that the self-cleaning of the sieve barrel during use can be realized, without stopping the machine for maintenance and dredging, prolonging the continuous working time of the ball mill to improve the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0020] Figure 2 It is a schematic diagram of the split structure of the device of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the device of the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of the fixed outer cylinder of the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of the rotating inner cylinder of the present invention;

[0024] Figure 6Schematic cross-sectional structure diagram of the end cover of the present invention;

[0025] Figure 7 Schematic structure diagram of the movable screening assembly of the present invention.

[0026] In the figure: 1, rotating inner cylinder; 2, communication port; 3, through hole; 4, movable screening assembly; 401, screening barrel; 402, grille; 403, connecting rod; 404, return spring; 405, ball seat; 5, grinding roller; 6, inner lining plate; 7, steel ball; 8, discharge port; 9, gear ring; 10, fixed outer cylinder; 11, air duct; 12, feed port; 13, outer lining plate; 14, annular channel; 15, reciprocating adjustment assembly; 1501, end cover; 1502, slag discharge port; 1503, telescopic rod; 1504, rotating pin; 1505, inclined plate. Specific embodiments

[0027] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention

[0028] Please refer to Figures 5 to 7 , the present invention provides a technical solution: an efficient lithium ore ball mill, including a rotating inner cylinder 1 and a movable screening assembly 4. One end of the axis of the rotating inner cylinder 1 is provided with a communication port 2, and through holes 3 are symmetrically provided at the upper and lower ends of the communication port 2. The movable screening assembly 4 is slidably installed at the end of the rotating inner cylinder 1. The movable screening assembly 4 includes a screening barrel 401, a grille 402, a connecting rod 403, a return spring 404 and a ball seat 405. The inner cavity of the screening barrel 401 is connected to the rotating inner cylinder 1 through the communication port 2, and the grille 402 is circumferentially and arrayedly fixed on the screening barrel 401, and there is a gap between adjacent grilles 402. Both ends of one side of the screening barrel 401 are fixedly installed with connecting rods 403, and the connecting rods 403 are slidably matched with the corresponding through holes 3, and a return spring 404 is sleeved on the connecting rods 403 in the gap between the screening barrel 401 and the rotating inner cylinder 1. The outer edge of the other side of the screening barrel 401 is fixedly installed with a ball seat 405, and a movable ball is rotatably installed inside the ball seat 405. The other side opening of the fixed outer cylinder 10 is fixedly installed with a reciprocating adjustment assembly 15 by screws. The reciprocating adjustment assembly 15 includes an end cover 1501, a slag discharge port 1502 and a telescopic rod 1503. The end cover 1501 is fastened to the screw holes reserved at the other side opening of the fixed outer cylinder 10 by screws, and the bottom side of the end cover 1501 is communicated with the slag discharge port 1502, and a telescopic rod 1503 is threadedly connected to the outside of the end cover 1501. The reciprocating adjustment assembly 15 further includes a rotating pin 1504 and an inclined plate 1505. The rotating pin 1504 is fixedly installed inside the end cover 1501, and one end of the rotating pin 1504 is rotatably connected to the inclined plate 1505. The other end of the inclined plate 1505 abuts against the end of the telescopic rod 1503, and the disk surface of the inclined plate 1505 is in rolling cooperation with the movable ball inside the ball seat 405;

[0029] The specific operation is as follows. During continuous use, the lithium ore material will gradually block the gaps of the grille 402 on the outer edge of the sieve barrel 401, resulting in poor material passage and thus forming a pile. In traditional technologies, it is often necessary to stop the ball mill and disassemble the sieve barrel 401 for dredging and cleaning. However, during the use of this application, the user only needs to rotate the handwheel to control the telescopic rod 1503 to abut against one end of the inclined plate 1505, so that the other end of the inclined plate 1505 is inclined inside the end cover 1501 through the rotating pin 1504. In this way, during the process of the ball seat 405 on the outer edge of the head end of the sieve barrel 401 rolling on the inclined disk surface of the end cover 1501, it reciprocally slides through the through holes 3 at both ends of the communication port 2 at the end of the rotating inner cylinder 1 via the connecting rods 403 on both sides of the tail end of the sieve barrel 401. The setting of the return spring 404 ensures that the ball seat 405 on the outer edge of the head end of the sieve barrel 401 always adheres tightly to the inclined disk surface of the end cover 1501 to ensure the continuous progress of the reciprocating motion. Through the linkage cooperation of the movable screening component 4 and the reciprocating adjustment component 15, on the one hand, the rotating inner cylinder 1 drives the sieve barrel 401 externally connected at the communication port 2 to rotate synchronously and uniformly through the connecting rod 403, realizing the particle size screening of the coarsely ground material particles to ensure the uniformity of the particles for subsequent fine grinding. On the other hand, by controlling the change of the inclination angle of the lower inclined plate 1505 through the telescopic rod 1503, the sieve barrel 401 not only rotates synchronously with the rotating inner cylinder 1 but also reciprocally swings through the connecting rod 403 in the through hole 3 at the end of the rotating inner cylinder 1. Under the action of inertia and centrifugal force, the material blocked in the gaps of the grille 402 is peeled off. In this way, the self-cleaning of the sieve barrel 401 during use can be realized, without the need for shutdown maintenance and dredging, extending the continuous working time of the ball mill to improve the use efficiency;

[0030] Please refer to Figures 1 to 4 As shown in the figure, grinding rollers 5 are radially arranged around the outer wall of the rotating inner cylinder 1, and a lining plate 6 is fixedly installed on the inner wall of the rotating inner cylinder 1. Moreover, steel balls 7 are filled in the cavity of the rotating inner cylinder 1. An outlet 8 is provided at the other end of the axis of the rotating inner cylinder 1, and the outlet 8 is connected in series with the wind power system through an air duct, so that a negative pressure state is formed in the rotating inner cylinder 1. A gear ring 9 is arranged around the outer edge of the outlet 8, and the gear ring 9 meshes with the gear at the output end of the driving device to realize rotational transmission. A fixed outer cylinder 10 is sleeved outside the rotating inner cylinder 1, and the axes of the rotating inner cylinder 1 and the fixed outer cylinder 10 coincide and form an angle with the horizontal plane. Moreover, one side of the fixed outer cylinder 10 is open and is rotationally matched with the rotating inner cylinder 1 through a slewing bearing. An air duct 11 is embedded in the inner wall of the fixed outer cylinder 10, and the inlets and outlets at both sides of the "U" - shaped structure of the air duct 11 are respectively located at the head and tail ends of the axis of the grinding roller 5. A feed inlet 12 is connected to the side end of the fixed outer cylinder 10, and the feed inlet 12 is connected to the lithium ore bin through a feeder. The outer lining plate 13 is fixed to the inner wall of the fixed outer cylinder 10 by screws, and an annular channel 14 matched with the grinding roller 5 is provided on the inner wall of the outer lining plate 13;

[0031] The specific operation is as follows. The lithium-fixing ore of this application is sent to the feed inlet 12 at the side end of the fixed outer cylinder 10 by a feeder after being crushed. The driving device meshes with the gear ring 9 at the tail end of the rotating inner cylinder 1 through the output gear, so that the rotating inner cylinder 1 rotates uniformly inside the fixed outer cylinder 10 through the slewing bearing. The axes of the fixed outer cylinder 10 and the rotating inner cylinder 1 embedded therein coincide and form an angle with the horizontal plane. On the one hand, the lithium ore material scatters into the annular channel 14 on the inner wall of the fixed outer cylinder 10 under the action of gravity, and then the rotating inner cylinder 1 realizes the rough grinding of the lithium ore material through the rolling of the grinding rollers 5 arranged radially on the outer edge in the annular channel 14 on the inner wall of the fixed outer cylinder 10. On the other hand, the discharge port 8 of the rotating inner cylinder 1 is connected in series with the wind power system through an air duct, so that the rotating inner cylinder 1 is in a negative pressure state, and the lithium ore material after rough grinding flows back to the sieve barrel 401 at the head end of the rotating inner cylinder 1 through the air duct 11. The qualified material is sucked into the rotating inner cylinder 1 through the gaps of the grille 402 on the outer edge of the sieve barrel 401. Then, during the rotation of the rotating inner cylinder 1, the steel balls 7 inside it are taken away by the cylinder body attached to the inner lining plate 6 of the cylinder due to inertia, centrifugal force and friction. When it is brought to a certain height, it is thrown down due to its own gravity. The falling steel balls 7 act like projectiles to hit and grind the material inside the cylinder to realize the fine grinding of the lithium ore material. The unqualified material falls back again for rough grinding until it meets the particle size standard. This application first conducts rough grinding on the lithium ore material and then fine grinding, which effectively facilitates the grinding of the material by the ball mill, expands the applicable range of the ball mill, reduces the grinding time of the material, improves the grinding efficiency, reduces the equipment energy consumption, and the lithium ore material after rough grinding is screened, which is beneficial to controlling the particle size and uniformity of the material and further optimizing the grinding effect.

[0032] In summary, when using this high-efficiency lithium ore ball mill, the solid lithium ore in this application is sent to the feed port 12 at the side end of the fixed outer cylinder 10 by the feeder after being crushed. The driving device meshes with the ring gear 9 at the tail end of the rotating inner cylinder 1 through the output gear, so that the rotating inner cylinder 1 rotates uniformly inside the fixed outer cylinder 10 through the slewing bearing. The axes of the fixed outer cylinder 10 and the rotating inner cylinder 1 embedded therein coincide and form an angle with the horizontal plane. On the one hand, the lithium ore material scatters into the annular channel 14 on the inner wall of the fixed outer cylinder 10 under the action of gravity, and then the rotating inner cylinder 1 realizes the rough grinding of the lithium ore material through the rolling of the grinding rollers 5 arranged radially on the outer edge in the annular channel 14 on the inner wall of the fixed outer cylinder 10. On the other hand, the discharge port 8 of the rotating inner cylinder 1 is connected in series with the wind power system through the air duct, so that the rotating inner cylinder 1 is in a negative pressure state, and the lithium ore material after rough grinding flows back to the sieve barrel 401 at the head end of the rotating inner cylinder 1 through the air duct 11. The qualified material is sucked into the rotating inner cylinder 1 through the gaps of the grille 402 on the outer edge of the sieve barrel 401. During the rotation of the rotating inner cylinder 1, the steel balls 7 inside it are taken away by the cylinder body due to inertia, centrifugal force and friction and adhere to the inner lining plate 6 of the cylinder body. When it is brought to a certain height, it is thrown down due to its own gravity. The falling steel balls 7 act like projectiles to hit and grind the material in the cylinder to realize the fine grinding of the lithium ore material. The unqualified material falls back again for rough grinding until it meets the particle size standard. This application first conducts rough grinding on the lithium ore material and then fine grinding, which effectively facilitates the grinding of the material by the ball mill, expands the applicable range of the ball mill, reduces the grinding time of the material, improves the grinding efficiency, reduces the equipment energy consumption, and the lithium ore material after rough grinding is sieved, which is beneficial to controlling the particle size and uniformity of the material and further optimizing the grinding effect. During the continuous use process, the lithium ore material will gradually block the gaps of the grille 402 on the outer edge of the sieve barrel 401, resulting in poor material passage and then forming a pile. In the traditional technology, it is often necessary to stop the ball mill and disassemble the sieve barrel 401 for dredging and cleaning. During the use of this application, the user only needs to rotate the handwheel to control the telescopic rod 1503 to abut against one end of the inclined plate 1505, so that the other end of the inclined plate 1505 is inclined inside the end cover 1501 through the rotating pin 1504. In this way, during the rolling of the ball seat 405 on the outer edge of the head end of the sieve barrel 401 on the inclined disk of the end cover 1501, it reciprocates and slides through the through holes 3 at both ends of the connecting port 2 at the end of the rotating inner cylinder 1 through the connecting rods 403 on both sides of the tail end of the sieve barrel 401. The setting of the return spring 404 ensures that the ball seat 405 on the outer edge of the head end of the sieve barrel 401 always adheres to the inclined disk of the end cover 1501 to ensure the continuous progress of the reciprocating motion. Through the linkage cooperation of the movable screening assembly 4 and the reciprocating adjustment assembly 15, this application, on the one hand, enables the rotating inner cylinder 1 to drive the sieve barrel 401 externally connected at the connecting port 2 to rotate synchronously and uniformly through the connecting rod 403, realizes the particle size screening of the material particles after rough grinding to ensure the particle uniformity of subsequent fine grinding,On the other hand, by controlling the change of the inclination angle of the lower inclined plate 1505 through the telescopic rod 1503, the sieve barrel 401 can reciprocally swing in the through hole 3 at the end of the rotating inner cylinder 1 through the connecting rod 403 while keeping synchronous rotation with the rotating inner cylinder 1. Under the action of inertia and centrifugal force, the materials blocked in the gaps of the grille 402 are peeled off. In this way, the self-cleaning of the sieve barrel 401 during use can be realized, without the need for shutdown maintenance and dredging, and the continuous working time of the ball mill can be extended to improve the use efficiency.

[0033] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various implementations with various modifications suitable for specific purposes.

Claims

1. A high-efficiency lithium ore ball mill, characterized in that: The invention comprises a rotating inner cylinder (1) and a movable screening assembly (4), wherein a connecting port (2) is provided at one end of the axis of the rotating inner cylinder (1), and through holes (3) are symmetrically provided at the upper and lower ends of the connecting port (2), and the movable screening assembly (4) is slidably mounted on the end of the rotating inner cylinder (1), and the movable screening assembly (4) comprises a screening barrel (401), a grille (402), a connecting rod (403), a return spring (404) and a ball seat (405), and the inner cavity of the screening barrel (401) is connected to the rotating inner cylinder (1) through the connecting port (2), and grilles (402) are fixed to the screening barrel (401) in a circumferential array, and gaps are left between adjacent grilles (402), and the movable screening assembly (404) is slidably mounted on the end of the rotating inner cylinder (1). Connecting rods (403) are fixedly mounted at both ends of one side of the screen barrel (401), and the connecting rods (403) are slidably matched with corresponding through holes (3), and a return spring (404) is sleeved on the connecting rod (403) in the gap between the screen barrel (401) and the rotating inner cylinder (1), and a ball seat (405) is fixedly mounted on the outer edge of the other side of the screen barrel (401), and a movable ball is rotatably mounted inside the ball seat (405), a grinding roller (5) is radially surrounded by the outer wall of the rotating inner cylinder (1), and an inner lining plate (6) is fixedly mounted on the inner wall of the rotating inner cylinder (1), and a steel ball (7) is filled in the cavity of the rotating inner cylinder (1), and a material discharge opening is opened at the other end of the axis of the rotating inner cylinder (1). The outlet (8) is connected in series with the wind system through an air duct so that the rotating inner cylinder (1) is in a negative pressure state. The rotating inner cylinder (1) is sleeved with a fixed outer cylinder (10). The axes of the rotating inner cylinder (1) and the fixed outer cylinder (10) coincide with each other and form an angle with the horizontal plane. The opening on one side of the fixed outer cylinder (10) is rotatably matched with the rotating inner cylinder (1) through a slewing bearing. The opening on the other side of the fixed outer cylinder (10) is screwed with a reciprocating adjustment component (15). The reciprocating adjustment component (15) comprises an end cover (1501), a slag discharge port (1502) and a telescopic rod (1503). The end cover (1501) is screwed The end cover (1501) is fastened to a screw hole reserved for opening on the other side of the fixed outer cylinder (10), and the bottom side of the end cover (1501) is connected to a slag discharge port (1502), and the outer side of the end cover (1501) is threadedly connected to a telescopic rod (1503). The reciprocating adjustment component (15) further comprises a rotating pin (1504) and an inclined plate (1505). The inner side of the end cover (1501) is fixedly mounted with a rotating pin (1504), and the rotating pin (1504) is rotatably connected to one end of the inclined plate (1505), and the other end of the inclined plate (1505) is in contact with the end of the telescopic rod (1503), and the disc surface of the inclined plate (1505) is in rolling cooperation with the movable ball in the ball seat (405).

2. The high-efficiency lithium ore ball mill according to claim 1, characterized in that: The outer edge of the discharge port (8) is surrounded by a gear ring (9), and the gear ring (9) meshes with a gear at the output end of the drive device to achieve rotational transmission.

3. A high-efficiency lithium ore ball mill according to claim 2, characterized in that: An air duct (11) is embedded in the inner wall of the fixed outer cylinder (10), and the inlets and outlets on both sides of the "U"-shaped structure of the air duct (11) are respectively located at the head and tail ends of the axis of the grinding roller (5).

4. The high-efficiency lithium ore ball mill according to claim 3, characterized in that: A feed port (12) is connected to a side end of the fixed outer cylinder (10), and the feed port (12) is connected to a lithium ore silo via a feeder.

5. The high-efficiency lithium ore ball mill according to claim 4, characterized in that: An outer lining plate (13) is screwed onto the inner wall of the fixed outer cylinder (10), and a ring channel (14) matching with the grinding roller (5) is formed on the inner wall of the outer lining plate (13).

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