A lithium-rich lithium-iron-phosphate preparation device and method

Abstract

The application discloses a lithium-rich lithium iron phosphate preparation device and method, and relates to the technical field of lithium-rich lithium iron phosphate preparation. The lithium-rich lithium iron phosphate preparation device comprises a ball mill used for mixing lithium-rich lithium iron phosphate and metal lithium and performing ball milling to obtain required lithium supplement material, the ball mill comprises a grinding cylinder, and support frames for supporting the grinding cylinder are arranged at two ends of the grinding cylinder. In the process of mixing lithium-rich lithium iron phosphate and metal lithium and performing ball milling operation by using the ball mill, the mutual cooperation of the control assembly and the separation assembly is used to assist the separation of the partially adhered material from the inner wall of the grinding cylinder and the rapid heat removal of the ball mill, temperature control of the ball mill is realized, the adhesion probability of the material in the processing process caused by the excessively high internal temperature of the ball mill is reduced, the smooth operation of the ball mill is ensured, and the grinding effect and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium-rich lithium iron phosphate preparation, in particular to a lithium-rich lithium iron phosphate preparation device and method. BACKGROUND

[0002] Lithium-rich lithium iron phosphate is a lithium metal oxide with a reverse fluorite structure and has very high specific capacity, making it an ideal pre-lithium additive.

[0003] A ball mill is a commonly used processing device in the preparation and processing of lithium-rich lithium iron phosphate. The application of the ball mill in the preparation of lithium-rich lithium iron phosphate mainly involves mixing lithium-rich lithium iron phosphate with metal lithium and ball milling to obtain the required lithium supplement material. Through the grinding action of the ball mill, the mixing uniformity and chemical reaction degree of the raw materials can be improved, and the lithium supplement efficiency and performance of lithium-rich lithium iron phosphate can be improved. At the same time, the ball mill can also adjust the ball milling parameters such as ball-to-material ratio and ball milling time to meet the different particle size and performance requirements of lithium-rich lithium iron phosphate lithium supplement materials. The ball mill has important application value in the preparation process of lithium-rich lithium iron phosphate.

[0004] In the process of mixing lithium-rich lithium iron phosphate with metal lithium and ball milling to obtain the required lithium supplement material through the ball mill, lithium-rich lithium iron phosphate has high adhesion and is easily adhered to the inner wall of the ball mill, which causes the ball mill to run poorly and affects the grinding effect and efficiency. SUMMARY

[0005] The present application aims to provide a lithium-rich lithium iron phosphate preparation device and method to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a lithium-rich lithium iron phosphate preparation device, comprising a ball mill for mixing lithium-rich lithium iron phosphate with metal lithium and ball milling to obtain the required lithium supplement material, the ball mill comprising a grinding cylinder, both ends of the grinding cylinder being provided with a support frame for supporting the grinding cylinder, further comprising a mounting plate, the mounting plate being fixedly connected to the top of the support frame by a fixing rod, one side of the mounting plate being provided with a separation assembly for knocking and separating the material adhered to the inner wall of the grinding cylinder during the operation of the ball mill;

[0007] The separation assembly comprises a top plate arranged on one side of a mounting plate and connected with the mounting plate through a first connecting assembly, the mounting plate is provided with a pushing assembly for pushing the top plate, a strip-shaped plate is arranged below the top plate and connected with the top plate through a second connecting assembly, the lower end of the strip-shaped plate is transversely arranged and fixed with a plurality of knocking rods for abutting against the outer side of the grinding cylinder, the lower end of each knocking rod is provided with a rolling assembly for facilitating the normal rotation of the grinding cylinder during knocking, and the outer side of the grinding cylinder is provided with an extruding assembly for extruding the strip-shaped plate.

[0008] Preferably, the second connecting assembly comprises a plurality of first sleeves fixed on the top plate, each first sleeve is slidably connected with a first sliding rod, one end of each first sliding rod is fixed with the strip-shaped plate, and a first spring is arranged outside each first sleeve and connected with the top plate and the strip-shaped plate at both ends.

[0009] Preferably, the extruding assembly comprises a transmission pin fixed at the lower end of the strip-shaped plate, an installation ring is fixedly arranged outside the grinding cylinder, a plurality of extruding plates are annularly arranged outside the installation ring, and an inclined surface is formed on one side of each extruding plate for abutting against and extruding the end of the transmission pin.

[0010] Preferably, the rolling assembly comprises a spherical groove formed at the lower end of the knocking rod, and a ball is rotatably connected in the spherical groove.

[0011] Preferably, the first connecting assembly comprises a first fixed plate fixed on one side of the mounting plate, one side of the top plate is fixed with a second fixed plate, a plurality of second sleeves are fixed on the second fixed plate, each second sleeve is slidably connected with a second sliding rod, one end of each second sliding rod is fixed with the first fixed plate, and a second spring is arranged outside each second sleeve and connected with the first fixed plate and the second fixed plate at both ends.

[0012] Preferably, the pushing assembly comprises an L-shaped frame fixed on the upper end of the mounting plate, a drive shaft is rotatably connected on the L-shaped frame, a cam is fixed at one end of the drive shaft for abutting against and pushing the second fixed plate, and a drive motor is arranged on the upper end of the L-shaped frame for driving the drive shaft.

[0013] Preferably, the control assembly comprises two groups of heat dissipation pipes arranged above the top plate, a plurality of air inlet pipes are arranged on the heat dissipation pipes and arranged towards the outer side of the grinding cylinder, and an air suction assembly is arranged on the top plate for sucking air for the two groups of heat dissipation pipes.

[0014] Preferably, the intake assembly includes an exhaust pipe, one end of which is connected to a heat exhaust pipe, and a fixed pipe is installed on the exhaust pipe, with a pressure-drawing assembly for pressure drawing provided on the fixed pipe.

[0015] Preferably, the pressure-collecting assembly includes two one-way valves fixed inside the exhaust pipe. The conduction direction of the two one-way valves is from one end of the exhaust pipe towards the heat dissipation pipe to the other end. The fixed pipe is located between the two one-way valves. A piston plate is slidably connected to the fixed pipe. A transmission rod is slidably connected to the lower end of the fixed pipe. The two ends of the transmission rod are fixed to the strip plate and the piston plate, respectively. A third spring is sleeved on the outside of the transmission rod. The two ends of the third spring are connected to the piston plate and the inner wall of the fixed pipe, respectively.

[0016] A method for preparing and using a lithium-rich lithium iron phosphate preparation apparatus includes the following steps:

[0017] S1: During the ball milling process of mixing lithium iron ferrite and metallic lithium using a ball mill, the grinding cylinder is driven by the internal drive of the ball mill to move under force.

[0018] S2: During the rotation of the grinding cylinder, the mounting ring is driven to rotate synchronously. During the rotation of the mounting ring, each extrusion plate is driven to move. During the movement of each extrusion plate, the inclined surface on each extrusion plate abuts against the lower end of the transmission pin in sequence.

[0019] S3: During the process of the inclined plane abutting against the lower end of the transmission pin, the transmission pin and the strip plate are pushed towards the top plate by the pushing action of the inclined plane against the lower end of the transmission pin. During the movement, each first slide rod is pushed to slide on each first sleeve and the first spring is deformed to generate elastic force. When the inclined plane is not abutting against the lower end of the transmission pin, the elastic force of each first spring pushes the strip plate away from the top plate. Therefore, during the rotation of the grinding cylinder, the strip plate is driven to move towards or away from the top plate through transmission. During the movement, the balls at the ends of each striking rod intermittently abut against the outside of the grinding cylinder, striking the rotating grinding cylinder. Through the striking action of the grinding cylinder, the material that is partially stuck in the grinding process is separated from the inner wall of the grinding cylinder, ensuring the smooth operation of the ball mill and improving the grinding effect and efficiency.

[0020] S4: During the reciprocating motion of the strip plate, the piston plate is driven to reciprocate inside the fixed tube via the transmission rod. Since the conduction direction of the two one-way valves is from one end of the exhaust pipe to the other end of the heat exhaust pipe, the reciprocating motion of the piston plate draws air and pressurizes the inside of the exhaust pipe and the heat exhaust pipe. During the drawing and pressing process, the hot air generated and overflowing during the operation of the ball mill is drawn in through multiple air inlet pipes and discharged outward through the heat exhaust pipe and the exhaust pipe, which helps the ball mill to quickly dissipate heat, realize the temperature control of the ball mill, and reduce the probability of material adhesion and sticking during the processing due to excessive internal temperature of the ball mill.

[0021] S5: During temperature control and tapping, the drive motor is started, and the cam at one end of the drive shaft is driven to rotate through the drive motor.

[0022] S6: During the rotation of the cam, when the cam abuts against the second fixed plate, it pushes the second fixed plate and the top plate to move under force. During the movement, it pulls multiple second slide rods to slide on each of the second sleeves and causes the second springs to deform under force and generate elastic force. As the cam rotates, when the cam no longer abuts against the second fixed plate, the elastic force of multiple second springs causes the second fixed plate and the top plate to reset. Therefore, driven by the drive motor, the second fixed plate and the top plate are forced to move towards or away from the first fixed plate. During the reciprocating movement of the top plate, it drives each striking rod and each air inlet pipe to move back and forth. Through the reciprocating movement of the striking rod and the air inlet pipe, it is convenient to perform striking separation and air intake cooling treatment at different positions, ensuring the effect of separating the sticky materials inside the ball mill.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This apparatus and method for preparing lithium-rich lithium iron ferrite uses a ball mill to mix lithium-rich lithium iron ferrite with metallic lithium and perform ball milling. During the process, the control components and separation components work together to help partially adhered materials separate from the inner wall of the mill cylinder while simultaneously assisting the ball mill in rapid heat dissipation. This achieves temperature control of the ball mill, reduces the probability of material adhesion during processing due to excessively high internal temperatures, ensures smooth operation of the ball mill, and improves grinding effect and efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the extrusion assembly structure of the present invention;

[0027] Figure 3This is a schematic diagram of the separation component, rolling component, and second connecting component of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the first connecting component and the pushing component of the present invention;

[0029] Figure 5 This is a schematic diagram of the control component structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the pumping assembly structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the air intake component structure of the present invention.

[0032] In the diagram: 101, grinding cylinder; 102, support frame; 2, fixing rod; 3, mounting plate; 4, separation assembly; 401, top plate; 402, strip plate; 403, striking rod; 5, rolling assembly; 501, spherical groove; 502, ball bearing; 6, second connecting assembly; 601, first sleeve; 602, first slide rod; 603, first spring; 7, extrusion assembly; 701, transmission pin; 702, mounting ring; 703, extrusion plate; 704, inclined plane; 8, first connecting assembly; 801, first fixing plate. 802. Second fixing plate; 803. Second sleeve; 804. Second slide rod; 805. Second spring; 9. Push assembly; 901. L-shaped frame; 902. Drive shaft; 903. Cam; 904. Drive motor; 10. Control assembly; 1001. Heat exhaust pipe; 1002. Intake pipe; 11. Intake assembly; 1101. Exhaust pipe; 1102. Fixing pipe; 12. Pressure suction assembly; 1201. Piston plate; 1202. Transmission rod; 1203. Third spring; 1204. One-way valve. Detailed Implementation

[0033] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-7The present invention provides a technical solution: a lithium-rich lithium iron ferrite preparation device, including a ball mill for mixing lithium-rich lithium iron ferrite with metallic lithium and ball milling to obtain the required lithium supplementation material. The ball mill includes a grinding cylinder 101, and support frames 102 for supporting the grinding cylinder 101 are provided at both ends of the grinding cylinder 101. It also includes a mounting plate 3, which is fixedly mounted on the support frame 102 by the fixed connection of the fixing rod 2. A separation component 4 is provided on one side of the mounting plate 3 for knocking and separating the material adhering to the inner wall of the grinding cylinder 101 during the operation of the ball mill.

[0035] The separation component 4 includes a top plate 401, which is disposed on one side of the mounting plate 3 and connected to the mounting plate 3 via a first connecting component 8. The mounting plate 3 is provided with a pushing component 9 for pushing the top plate 401. A strip plate 402 is disposed below the top plate 401 and is connected to the top plate 401 via a second connecting component 6. Multiple sets of striking rods 403 for abutting against the outside of the grinding cylinder 101 are horizontally arranged and fixed at the lower end of the strip plate 402. Each striking rod 403 is provided with a rolling component 5 at the lower end to facilitate the normal rotation of the grinding cylinder 101 during the striking process. A pressing component 7 for pressing the strip plate 402 is provided on the outside of the grinding cylinder 101. A control component 10 for temperature control of the grinding cylinder 101 during operation is provided on the top plate 401.

[0036] During the ball milling process of mixing lithium iron ferrite with metallic lithium, the control component 10 and the separation component 4 work together to help the partially adhered material separate from the inner wall of the mill cylinder 101 while assisting the ball mill in rapid heat dissipation. This achieves temperature control of the ball mill, reduces the probability of material adhesion during processing due to excessively high internal temperature, ensures smooth operation of the ball mill, and improves grinding effect and efficiency.

[0037] Preferably, the second connecting assembly 6 includes a plurality of first sleeves 601 fixed on the top plate 401, each first sleeve 601 having a first slide rod 602 slidably connected thereto, one end of each first slide rod 602 being fixed to the strip plate 402, and a first spring 603 being sleeved on the outer side of each first sleeve 601, the two ends of the first spring 603 being connected to the top plate 401 and the strip plate 402 respectively; the extrusion assembly 7 includes a drive pin 701 fixed to the lower end of the strip plate 402, an installation ring 702 being sleeved and fixed on the outer side of the grinding cylinder 101, and a plurality of extrusion plates 703 being fixed in a circular array on the outer side of the installation ring 702, each extrusion plate 703 having a bevel 704 on one side for pressing against the end of the drive pin 701; during the rotation of the grinding cylinder 101, the installation ring 702 is driven. Synchronous rotation: During the rotation of the mounting ring 702, each extrusion plate 703 is driven to move. During the movement of each extrusion plate 703, the inclined surface 704 on each extrusion plate 703 abuts against the lower end of the transmission pin 701 in sequence. During the abutment between the inclined surface 704 and the lower end of the transmission pin 701, the abutment between the inclined surface 704 and the lower end of the transmission pin 701 pushes the transmission pin 701 and the strip plate 402 to move towards the top plate 401. During the movement, each first slide rod 602 is pushed to slide on each first sleeve 601 and the first spring 603 is deformed to generate elastic force. When the inclined surface 704 is not abutting against the lower end of the transmission pin 701, the elastic force of each first spring 603 pushes the strip plate 402 away from the top plate 401.

[0038] Preferably, the rolling assembly 5 includes a spherical groove 501 formed at the lower end of the striking rod 403, and a ball bearing 502 is rotatably connected to the spherical groove 501; when the ball bearing 502 at the lower end of the striking rod 403 abuts against the outer side of the grinding cylinder 101, as the grinding cylinder 101 rotates, the ball bearing 502 rotates inside the spherical groove 501, and the rotation of the ball bearing 502 reduces the resistance to the rotation of the grinding cylinder 101.

[0039] Preferably, the first connecting assembly 8 includes a first fixing plate 801 fixed to one side of the mounting plate 3, a second fixing plate 802 fixed to one side of the top plate 401, a plurality of second sleeves 803 fixed on the second fixing plate 802, a second slide rod 804 slidably connected to each second sleeve 803, one end of each second slide rod 804 fixed to the first fixing plate 801, and a second spring 805 sleeved on the outside of each second sleeve 803, the two ends of the second spring 805 being connected to the first fixing plate 801 and the second fixing plate 802 respectively; the pushing assembly 9 includes an L-shaped frame 901 fixed to the upper end of the mounting plate 3, a drive shaft 902 rotatably connected to the L-shaped frame 901, a cam 903 fixed to one end of the drive shaft 902 for pushing against the second fixing plate 802, and a drive motor 904 for driving the drive shaft 902 mounted on the upper end of the L-shaped frame 901; when the drive motor 904 is started, the cam at one end of the drive shaft 902 is driven by the drive motor 904. When cam 903 rotates, and it abuts against the second fixed plate 802, it pushes the second fixed plate 802 and the top plate 401 to move under force. During this movement, it pulls multiple second slide rods 804 to slide on each of the second sleeves 803, causing the second springs 805 to deform and generate elastic force. As cam 903 rotates, when it is not abutting against the second fixed plate 802, the elastic force of the multiple second springs 805... The function is to reset the second fixed plate 802 and the top plate 401. Therefore, driven by the drive motor 904, the second fixed plate 802 and the top plate 401 are subjected to force to move towards or away from the first fixed plate 801. During the reciprocating motion of the top plate 401, each striking rod 403 and each air intake pipe 1002 are driven to move back and forth. Through the reciprocating motion of the striking rod 403 and the air intake pipe 1002, it is convenient to perform knocking separation and air intake cooling treatment at different positions.

[0040] Preferably, the control component 10 includes two sets of heat exhaust pipes 1001 disposed above the top plate 401. Multiple air inlet pipes 1002 are arranged and installed on the heat exhaust pipes 1001, with one end of each air inlet pipe 1002 facing the outside of the grinding cylinder 101. The top plate 401 is provided with an air intake component 11 for drawing air from the two sets of heat exhaust pipes 1001. Through the air intake component 11, the hot air generated and overflowing during the operation of the ball mill is drawn in and discharged to the outside through the heat exhaust pipes 1001 and the exhaust pipe 1101, assisting the ball mill in rapid heat dissipation, realizing temperature control of the ball mill, and reducing the probability of material adhesion and sticking during the processing due to excessive internal temperature of the ball mill.

[0041] Preferably, the intake assembly 11 includes an exhaust pipe 1101, one end of which is connected to the heat exhaust pipe 1001. A fixed pipe 1102 is installed on the exhaust pipe 1101, and a pressure-drawing assembly 12 for pressure drawing is provided on the fixed pipe 1102. The pressure-drawing assembly 12 includes two one-way valves 1204 fixed inside the exhaust pipe 1101. The conduction direction of the two one-way valves 1204 is from one end of the exhaust pipe 1101 towards the heat exhaust pipe 1001 to the other end. The fixed pipe 1102 is located between the two one-way valves 1204. A piston plate 1201 is slidably connected to the fixed pipe 1102, and a transmission rod 1202 is slidably connected to the lower end of the fixed pipe 1102. The two ends of the transmission rod 1202 are fixed to the strip plate 402 and the piston plate 1201, respectively. A third spring 1203 is sleeved on the outside of 1202. The two ends of the third spring 1203 are connected to the inner walls of the piston plate 1201 and the fixed tube 1102, respectively. During the reciprocating motion of the strip plate 402, the piston plate 1201 is driven to reciprocate up and down inside the fixed tube 1102 through the transmission rod 1202. Since the conduction direction of the two one-way valves 1204 is from one end of the exhaust pipe 1101 to the other end of the heat exhaust pipe 1001, the reciprocating motion of the piston plate 1201 is used to draw air and pressurize the interior of the exhaust pipe 1101 and the heat exhaust pipe 1001. During the drawing and pressing process, the hot air generated and overflowed during the operation of the ball mill is drawn in through multiple air inlet pipes 1002 and discharged outward through the heat exhaust pipe 1001 and the exhaust pipe 1101.

[0042] A method for preparing and using a lithium-rich lithium iron phosphate preparation apparatus includes the following steps:

[0043] S1: During the process of mixing lithium iron ferrite and metallic lithium using a ball mill and performing ball milling, the grinding cylinder 101 is driven by force to move through the ball mill.

[0044] S2: During the rotation of the grinding cylinder 101, the mounting ring 702 is driven to rotate synchronously. During the rotation of the mounting ring 702, each extrusion plate 703 is driven to move. During the movement of each extrusion plate 703, the inclined surface 704 on each extrusion plate 703 abuts against the lower end of the transmission pin 701 in sequence.

[0045] S3: During the process of the inclined plane 704 abutting against the lower end of the transmission pin 701, the pushing action of the inclined plane 704 against the lower end of the transmission pin 701 causes the transmission pin 701 and the strip plate 402 to move towards the top plate 401. During the movement, each first slide rod 602 is pushed to slide on each first sleeve 601, and the first spring 603 is deformed to generate elastic force. When the inclined plane 704 is not abutting against the lower end of the transmission pin 701, the elastic force of each first spring 603 pushes the strip plate 402 away from the top plate 401. As the grinding cylinder 101 rotates, the strip plate 402 moves towards or away from the top plate 401 via transmission. During this movement, the balls 502 at the ends of each striking rod 403 intermittently abut against the outer side of the grinding cylinder 101, striking the rotating grinding cylinder 101. Through the striking action on the grinding cylinder 101, the material that is partially adhered to during the processing operation is separated from the inner wall of the grinding cylinder 101, ensuring smooth operation of the ball mill and improving the grinding effect and efficiency.

[0046] S4: During the reciprocating motion of the strip plate 402, the piston plate 1201 is driven to reciprocate inside the fixed tube 1102 via the transmission rod 1202. Since the conduction direction of the two one-way valves 1204 is from one end of the exhaust pipe 1101 to the other end of the heat exhaust pipe 1001, the reciprocating motion of the piston plate 1201 is used to draw air and pressurize the interior of the exhaust pipe 1101 and the heat exhaust pipe 1001. During the drawing and pressing process, the hot air generated and overflowing during the operation of the ball mill is drawn in through multiple air inlet pipes 1002 and discharged outward through the heat exhaust pipe 1001 and the exhaust pipe 1101, which helps the ball mill to quickly dissipate heat, realize the temperature control of the ball mill, and reduce the probability of material adhesion and sticking during the processing due to excessive internal temperature of the ball mill.

[0047] S5: During the temperature control and tapping process, the drive motor 904 is started, and the cam 903 at one end of the drive shaft 902 is driven to rotate through the drive motor 904.

[0048] S6: During the rotation of cam 903, when cam 903 abuts against the second fixed plate 802, it pushes the second fixed plate 802 and the top plate 401 to move under force. During the movement, it pulls multiple second slide rods 804 to slide on each of the second sleeves 803, causing the second springs 805 to deform under force and generate elastic force. As cam 903 rotates, when cam 903 is not abutting against the second fixed plate 802, the elastic force of the multiple second springs 805 causes the second fixed plate 802 to move under force. The top plate 401 is reset, and thus, driven by the drive motor 904, the second fixed plate 802 and the top plate 401 are subjected to force to move towards or away from the first fixed plate 801 in a reciprocating motion. During the reciprocating motion of the top plate 401, each striking rod 403 and each air inlet pipe 1002 are driven to move back and forth. Through the reciprocating motion of the striking rod 403 and the air inlet pipe 1002, it is convenient to perform striking separation and air intake cooling treatment at different positions, so as to ensure the effect of separating the sticky materials inside the ball mill.

Claims

1. An apparatus for preparing lithium iron ferrite rich in lithium, comprising: A ball mill for mixing and ball milling lithium iron ferrite with metallic lithium to obtain the desired lithium supplement material, the ball mill including a grinding cylinder (101), and support frames (102) for supporting the grinding cylinder (101) at both ends. Its characteristic is that it further includes: Mounting plate (3), which is fixed above the support frame (102) by the fixing connection of the fixing rod (2), and a separation component (4) is provided on one side of the mounting plate (3) for knocking and separating the material adhering to the inner wall of the inner grinding cylinder (101) during the operation of the ball mill. The separating component (4) includes a top plate (401), which is disposed on one side of the mounting plate (3) and connected to the mounting plate (3) via a first connecting component (8). The mounting plate (3) is provided with a pushing component (9) for pushing the top plate (401). A strip plate (402) is disposed below the top plate (401), and the strip plate (402) is connected to the top plate (401) via a second connecting component (6). The lower end of the strip plate (402) is horizontally arranged with multiple sets of striking rods (403) for abutting against the outside of the grinding cylinder (101). The lower end of each striking rod (403) is provided with a rolling assembly (5) to facilitate the normal rotation of the grinding cylinder (101) during the striking process. The outside of the grinding cylinder (101) is provided with a pressing assembly (7) for pressing the strip plate (402). The top plate (401) is provided with a control assembly (10) for temperature control during the operation of the grinding cylinder (101). The control component (10) includes two sets of heat exhaust pipes (1001) disposed above the top plate (401). Multiple air inlet pipes (1002) are arranged on the heat exhaust pipes (1001). One end of each air inlet pipe (1002) is disposed facing the outside of the grinding cylinder (101). An air intake component (11) for drawing air from the two sets of heat exhaust pipes (1001) is disposed on the top plate (401). The air intake assembly (11) includes an exhaust pipe (1101), one end of which is connected to a heat exhaust pipe (1001). A fixed pipe (1102) is installed on the exhaust pipe (1101), and a pressure-drawing assembly (12) for pressure drawing is provided on the fixed pipe (1102). The pressure-drawing assembly (12) includes two one-way valves (1204) fixed inside the exhaust pipe (1101). The conduction direction of the two one-way valves (1204) is from one end of the exhaust pipe (1101) towards the heat dissipation pipe (1001) to the other end. The fixed pipe (1102) is located between the two one-way valves (1204). A piston plate (1201) is slidably connected to the fixed pipe (1102). A transmission rod (1202) is slidably connected to the lower end of the fixed pipe (1102). The two ends of the transmission rod (1202) are fixed to the strip plate (402) and the piston plate (1201) respectively. A third spring (1203) is sleeved on the outside of the transmission rod (1202). The two ends of the third spring (1203) are connected to the piston plate (1201) and the inner wall of the fixed pipe (1102) respectively. The ball mill draws in the hot air generated and overflowing during operation through multiple air inlet pipes (1002) and discharges it through the heat dissipation pipe (1001) and the exhaust pipe (1101), thus assisting the ball mill in rapid heat dissipation.

2. The lithium iron ferrite preparation apparatus according to claim 1, characterized in that: The second connecting assembly (6) includes a plurality of first sleeves (601) fixed on the top plate (401), each first sleeve (601) is slidably connected with a first slide rod (602), one end of each first slide rod (602) is fixed to the strip plate (402), and a first spring (603) is sleeved on the outside of each first sleeve (601), with both ends of the first spring (603) connected to the top plate (401) and the strip plate (402) respectively.

3. The lithium iron ferrite preparation apparatus according to claim 2, characterized in that: The extrusion assembly (7) includes a drive pin (701) fixed to the lower end of the strip plate (402), and an installation ring (702) is sleeved and fixed on the outer side of the grinding cylinder (101). Multiple extrusion plates (703) are fixed in an annular array on the outer side of the installation ring (702). Each extrusion plate (703) has a bevel (704) on one side for pressing against the end of the drive pin (701).

4. The lithium iron ferrite preparation apparatus according to claim 3, characterized in that: The rolling assembly (5) includes a spherical groove (501) formed at the lower end of the striking bar (403), and a ball bearing (502) is rotatably connected to the spherical groove (501).

5. The lithium iron ferrite preparation apparatus according to claim 4, characterized in that: The first connecting assembly (8) includes a first fixing plate (801) fixed on one side of the mounting plate (3), a second fixing plate (802) fixed on one side of the top plate (401), a plurality of second sleeves (803) fixed on the second fixing plate (802), a second slide rod (804) slidably connected on each second sleeve (803), one end of each second slide rod (804) fixed to the first fixing plate (801), and a second spring (805) sleeved on the outside of each second sleeve (803), the two ends of the second spring (805) being connected to the first fixing plate (801) and the second fixing plate (802) respectively.

6. The lithium iron ferrite preparation apparatus according to claim 5, characterized in that: The pushing assembly (9) includes an L-shaped frame (901) fixed to the upper end of the mounting plate (3), a drive shaft (902) is rotatably connected to the L-shaped frame (901), a cam (903) for pushing against the second fixed plate (802) is fixed at one end of the drive shaft (902), and a drive motor (904) for driving the drive shaft (902) is installed at the upper end of the L-shaped frame (901).

7. A method for preparing and using a lithium-rich lithium iron ferrite preparation apparatus, comprising the lithium-rich lithium iron ferrite preparation apparatus according to claim 6, characterized in that, Includes the following steps: S1: During the process of mixing lithium iron ferrite and metallic lithium using a ball mill and performing ball milling, the grinding cylinder (101) is driven by the internal drive of the ball mill to move under force. S2: During the rotation of the grinding cylinder (101), the mounting ring (702) is driven to rotate synchronously. During the rotation of the mounting ring (702), each extrusion plate (703) is driven to move. During the movement of each extrusion plate (703), the inclined surface (704) on each extrusion plate (703) abuts against the lower end of the transmission pin (701) in sequence. S3: During the process of the inclined plane (704) abutting against the lower end of the transmission pin (701), the pushing action of the inclined plane (704) against the lower end of the transmission pin (701) causes the transmission pin (701) and the strip plate (402) to move towards the top plate (401) under force. During the movement, each first slide rod (602) is pushed to slide on each first sleeve (601) and the first spring (603) is deformed under force to generate elastic force. When the inclined plane (704) is not abutting against the lower end of the transmission pin (701), the elastic force of each first spring (603) pushes the strip plate (401) to move towards the top plate (401). 02) Moving away from the top plate (401), so during the rotation of the grinding cylinder (101), the strip plate (402) is driven to move towards or away from the top plate (401) through transmission. During the movement, the balls (502) at the ends of each striking rod (403) intermittently abut against the outside of the grinding cylinder (101) to strike the rotating grinding cylinder (101). Through the striking action on the grinding cylinder (101), the material that is partially stuck in the processing operation is separated from the inner wall of the grinding cylinder (101), ensuring the smooth operation of the ball mill and improving the grinding effect and efficiency. S4: During the reciprocating motion of the strip plate (402), the piston plate (1201) is driven to reciprocate up and down inside the fixed tube (1102) via the transmission rod (1202). Since the conduction direction of the two one-way valves (1204) is from one end of the exhaust pipe (1101) to the other end of the heat exhaust pipe (1001), the reciprocating motion of the piston plate (1201) is used to pump air and pressurize the inside of the exhaust pipe (1101) and the heat exhaust pipe (1001). During the pumping and pressing process, the temperature of the ball mill is controlled, reducing the probability of material adhesion and sticking during the processing caused by excessively high internal temperature of the ball mill. S5: During the temperature control and tapping process, the drive motor (904) is started, and the cam (903) at one end of the drive shaft (902) is driven to rotate through the drive motor (904); S6: During the rotation of the cam (903), when the cam (903) abuts against the second fixed plate (802), it pushes the second fixed plate (802) and the top plate (401) to move under force. During the movement, it pulls multiple second slide rods (804) to slide on each second sleeve (803) and causes the second springs (805) to deform under force and generate elastic force. As the cam (903) rotates, when the cam (903) does not abut against the second fixed plate (802), the elastic force of multiple second springs (805) causes the second fixed plate (802) to move under force and generate elastic force. 02) and the top plate (401) are reset. Therefore, by driving the drive motor (904), the second fixed plate (802) and the top plate (401) are forced to move towards or away from the first fixed plate (801) in a reciprocating motion. During the reciprocating motion of the top plate (401), each striking rod (403) and each air inlet pipe (1002) are driven to move back and forth. Through the reciprocating motion of the striking rod (403) and the air inlet pipe (1002), it is convenient to perform striking separation and air intake cooling treatment at different positions, so as to ensure the effect of separating the sticky materials inside the ball mill.

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