Grinding device and grinding method for lithium iron phosphate production

Abstract

The invention relates to the technical field of lithium iron phosphate grinding, in particular to a grinding device for lithium iron phosphate production and a grinding method.The device comprises a tank body, a driving assembly and a first grinding assembly, a tank cover is installed at the top of the tank body, the driving assembly comprises a driving motor installed at the top of the tank cover, and a rotating shaft is fixedly arranged on an output shaft of the driving motor; the rotating shaft vertically extends into the tank body, the first grinding assembly is installed on the rotating shaft and comprises a first grinding seat, the first grinding seat is rotationally connected to the rotating shaft in a sleeving mode, the peripheral wall of the first grinding seat is fixedly arranged on the inner wall of the tank body, a conical groove is formed in the top face of the first grinding seat, and the rotating shaft is fixedly sleeved with a conical block; and a scraper is fixedly arranged on the peripheral wall of the conical block through a connecting block. According to the invention, the control capability on the granularity of the lithium iron phosphate material is improved, the uniform distribution of the granularity of the material is ensured, the problem of excessive grinding or insufficient grinding is avoided, the risk of material caking caused by the grinding wheel in the grinding process is reduced, and the grinding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium iron phosphate grinding, in particular to a grinding device and a grinding method for lithium iron phosphate production. Background Art

[0002] As an important cathode material for lithium-ion batteries, lithium iron phosphate has been widely used in electric vehicles, energy storage systems and other fields due to its high safety, long life and environmental protection characteristics. In the production process of lithium iron phosphate, the grinding of raw materials is a crucial link, which directly affects the performance and quality of the final product. After searching, the Chinese patent with the announcement number CN219596796U provides a grinding device for lithium iron phosphate precursor, in which the grinding balls are constantly vibrated and collide with each other under the action of a vibration device, thereby achieving the effect of squeezing, crushing and grinding the particles in the slurry. The ground slurry is discharged from a discharge pipe. The particle size of the ground slurry is adjusted by changing the diameter, material, roughness, etc. of the grinding balls and the residence time of the slurry in the grinding pipe. However, it was found during use that the device performs grinding through the impact of grinding balls, and it is difficult to control the particle size of the lithium iron phosphate material. Due to the randomness and unevenness of the impact, it is easy to cause uneven particle size distribution, and even over-grinding or under-grinding. This not only affects the uniformity and stability of the lithium iron phosphate material, but also increases the difficulty and cost of subsequent processing, which is not conducive to the grinding and use of lithium iron phosphate production. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a grinding device and a grinding method for lithium iron phosphate production, which improves the ability to control the particle size of lithium iron phosphate materials, ensures uniform distribution of material particle size, avoids the problem of over-grinding or under-grinding, reduces the risk of material agglomeration caused by the rolling wheel during the grinding process, makes the material particle size more uniform and fine, realizes continuous grinding of lithium iron phosphate materials, and improves grinding efficiency.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A grinding device for lithium iron phosphate production, comprising a tank body, a tank cover is installed on the top of which; A driving assembly, comprising a driving motor mounted on the top of the tank cover, wherein the output shaft of the driving motor is fixedly provided with a rotating shaft, and the rotating shaft vertically extends into the interior of the tank body; The first grinding assembly is mounted on the rotating shaft and comprises: A first grinding seat, wherein the first grinding seat is rotatably sleeved on the rotating shaft, an outer peripheral wall of the first grinding seat is fixedly arranged on the inner wall of the tank body, and a conical groove is arranged on the top surface of the first grinding seat; A conical block is fixedly sleeved on the rotating shaft, a scraper is fixedly arranged on the outer peripheral wall of the conical block through a connecting block, the bottom surface of the scraper is slidably connected to the bottom of the conical groove, and a plurality of dividing knives are fixedly arranged on the scraper; A truncated cone, the top of which is rotatably connected to the bottom of the conical block, and the truncated cone is fixedly arranged in the middle of the top surface of the first grinding seat, and a plurality of first sieve holes are arranged in an annular array on the outer peripheral wall of the truncated cone, and the aperture of the first sieve holes gradually decreases from the inside to the outside; The rolling assembly comprises a coupling fixed on the rotating shaft and a rolling wheel rotatably connected to the coupling. A scraper is fixed on the outer peripheral wall of the truncated cone, and the inner wall of the scraper is in sliding contact with the outer peripheral wall of the rolling wheel.

[0005] Preferably, the scraper is arranged in an S shape, and a sliding portion is provided on the scraper, the sliding portion is inclined, and the sliding portion is slidably connected to the wall of the conical groove. The scraper is provided with a pushing portion, and the thickness of the pushing portion gradually decreases along its S-shaped path. The top surface of the scraper is provided with a turning portion, and a plurality of splitting knives are respectively installed on the top surface of the turning portion. The scraper is provided with a curved portion, and the height of the curved portion gradually decreases along its S-shaped path.

[0006] Through the above technical solution, the crushing effect of the material during the rolling and grinding process is ensured, the processing efficiency is improved, and the occurrence of material agglomeration is reduced.

[0007] Preferably, the tank cover is fixedly connected to the tank body by a buckle, a feed hopper with a valve is installed on the top surface of the tank cover, a discharge pipe with a valve is installed on the bottom surface of the tank body through a mounting seat, a plurality of legs are fixedly provided on the bottom surface of the tank body, a fixed block is installed at the lower end of the tank body, and the outer peripheral wall at the lower end of the rotating shaft is rotatably connected to the fixed block.

[0008] Preferably, a fine crushing assembly is provided inside the tank body, and the fine crushing assembly includes a fine crushing disk, the outer peripheral wall of the fine crushing disk is fixedly arranged on the inner wall of the tank body, the fine crushing disk is rotatably sleeved on the rotating shaft, a protective cover is fixedly provided on the top surface of the middle part of the fine crushing disk, the middle part of the protective cover and the middle part of the fine crushing disk are respectively rotatably connected to the outer peripheral wall of the rotating shaft, a plurality of crushing rollers are rotatably connected to the protective cover in an annular array structure, and the outer peripheral wall of one end of the crushing roller away from the protective cover is rotatably connected to the fine crushing disk.

[0009] Preferably, a turntable is provided inside the protective cover, a gap is left between the outer peripheral wall of the turntable and the inner wall of the protective cover, the middle part of the turntable is fixedly connected to the outer peripheral wall of the rotating shaft, a gear ring is fixedly provided on the bottom surface of the turntable, a gear is fixedly connected to the crushing roller located inside the protective cover, and the upper ends of the multiple gears are respectively meshed with the gear rings, a C-shaped flap is fixedly provided on the crushing roller, and the outer peripheral wall of the C-shaped flap is slidably connected to the inner wall of the U-shaped groove, the cross-section of the lower end of the U-shaped groove is conical, and a plurality of first conical sieve holes are opened at the bottom of the U-shaped groove, and the aperture of the first conical sieve holes gradually increases from top to bottom.

[0010] Through the above technical solution, the efficiency and uniformity of fine crushing are improved, and the risk of clogging of materials during fine crushing and discharge is reduced.

[0011] Preferably, a second grinding assembly is provided at the lower end of the interior of the tank body, the second grinding assembly includes a second grinding seat, the outer peripheral wall of the second grinding seat is fixedly mounted on the inner wall of the tank body, a grinding groove is provided on the second grinding seat, a grinding wheel is in friction contact with the inner wall edge of the grinding groove, a support member is rotatably connected to the middle part of the grinding wheel, and the support member is fixedly mounted on the outer peripheral wall of the rotating shaft.

[0012] Preferably, the grinding groove is slidably connected to a triangular push block at one end close to the inner wall of the tank body, a connecting rod is fixed on the triangular push block, and the connecting rod is fixed on the outer peripheral wall of the rotating shaft at one end away from the triangular push block. The top surface of the second grinding seat is in a circular array structure with multiple second conical sieve holes, and the aperture of the second conical sieve holes gradually increases from top to bottom.

[0013] Through the above technical solution, the finely crushed lithium iron phosphate material is ground again at the edge of the moving grinding wheel, and the triangular push block pushes the lithium iron phosphate material through the second conical sieve hole for filtering and screening.

[0014] Preferably, the cooling component includes a metal water tank, which is fixedly mounted on the outer peripheral wall of the lower end of the tank body, and is connected to a pipe with a valve, and a water pump is installed on the top surface of the metal water tank, and the water inlet end of the water pump is connected to the interior of the metal water tank, and the water outlet end of the water pump is connected to one end of a metal heat pipe, and the other end of the metal heat pipe is connected to the interior of the lower end of the metal water tank, and a plurality of cooling fins are fixedly mounted on the side wall of the metal water tank.

[0015] Through the above technical solution, the heat on the tank body is exchanged through the coolant inside the metal heat pipe, the tank body is cooled, and the influence of temperature on the lithium iron phosphate material inside the tank body is reduced.

[0016] Preferably, a mounting frame is fixedly provided on the metal water tank, a bracket is fixedly provided inside the mounting frame, two circular shafts are rotatably connected to the bracket, a fan blade is sleeved on the outer circumferential wall of one end of the circular shaft, a rotating rod is coaxially connected to the output end of the water pump, pulleys are respectively sleeved on the outer circumferential wall of the rotating rod and the outer circumferential wall of the other end of the circular shaft, and the wheel grooves of the multiple pulleys are all driven by belt friction.

[0017] Through the above technical solution, the heat dissipation effect of the heat dissipation fins is enhanced, the continuous and stable operation of the cooling system is maintained, and problems such as material deterioration or reduced grinding efficiency due to excessive temperature are reduced.

[0018] A grinding method for a grinding device for lithium iron phosphate production, comprising the following steps: Initial grinding: First, the lithium iron phosphate production materials to be ground are transported to the inside of the tank, and then the drive motor drives the shaft to rotate to drive the coupling shaft and the cone block to rotate synchronously, so that the coupling shaft drives the rolling wheel to move. During the movement, the rolling wheel is squeezed with the lithium iron phosphate material, so that the rolling wheel rotates to extrude and grind the lithium iron phosphate. The lithium iron phosphate material ground to a suitable particle size passes through the first sieve hole of the cone and falls below, completing the initial grinding, thereby improving the ability to control the particle size of the lithium iron phosphate material, ensuring that the material particle size is evenly distributed, and avoiding the problem of over-grinding or under-grinding; Before rolling and grinding, the tank cover and the tank body are fixed by buckles, and the lithium iron phosphate material is fed through the feed hopper. While the shaft drives the coupling and the conical block to rotate, the conical block drives the scraper to move synchronously, so that the outer wall of the rotating rolling wheel slides with the inner wall of the scraper, and the lithium iron phosphate material attached to the outer wall of the rolling wheel is scraped off by the scraper. The aperture of the first sieve hole gradually decreases from the inside to the outside, which improves the passing rate of the first sieve hole, reduces the risk of blockage, and improves the filtering effect; The cone block rotates and drives the connecting block to move synchronously, so that the connecting block drives the scraper to rotate. When the scraper moves, it slides with the wall of the conical groove through the sliding part, so that the lithium iron phosphate material inside the conical groove is scooped up by the turning part and falls down again after passing over the top surface of the turning part. In the process of scooping up, the crushed and agglomerated lithium iron phosphate is cut and broken by the dividing knife. At the same time, the accumulated lithium iron phosphate material is pushed by the pushing part, so that the material with suitable particle size enters the first sieve hole. The material that fails to pass through the first sieve hole continues to accumulate to the upper end of the pushing part and then enters the turning part to fall back for rolling and grinding, until it is ground to a suitable particle size and then enters the first sieve hole to enter the next step, thereby ensuring the crushing effect of the material during the rolling and grinding process, improving the processing efficiency, and ensuring the consistency of material quality. Fine crushing: The lithium iron phosphate material that has completed the initial grinding falls into the U-shaped groove of the fine crushing disk, and the rotating shaft rotates to drive the rotating disk to rotate. The rotating disk also drives the gear ring to rotate, and the gear ring meshes to transmit the gear rotation, so that the gear drives the crushing roller to rotate along the protective cover and the fine crushing disk. The crushing roller crushes the lithium iron phosphate material at the lower end of the U-shaped groove. The rotating crushing roller drives the C-shaped flap to slide on the inner wall of the U-shaped groove, flipping the lithium iron phosphate material during crushing, so that the lithium iron phosphate material is further crushed until it is crushed to a suitable particle size and passes through the first conical sieve hole and falls into the lower end; Grinding again: The rotating shaft drives the grinding wheel to move through the supporting member, so that the grinding wheel contacts and rotates with the inner wall edge of the grinding groove, and the edge of the moving grinding wheel grinds the crushed lithium iron phosphate material again. After being ground to a suitable particle size, the material passes through the second conical sieve hole and falls into the lower end, and is discharged from the discharge pipe to the outside. While the rotating shaft drives the grinding wheel to move, the connecting rod drives the triangular push block to slide along the outer end wall of the grinding groove, scooping up the lithium iron phosphate material and turning it over the triangular push block. At the same time, the triangular push block pushes the lithium iron phosphate material to move toward the second conical sieve hole in the middle of the second grinding seat; Cooling treatment: The heat generated when the lithium iron phosphate material is ground is transferred to the tank body. After the metal heat pipe is installed on the outer wall of the tank, the coolant is filled into the metal water tank through the pipeline. The coolant in the metal water tank is sucked by the water pump and transported to the metal heat pipe. The coolant in the metal heat pipe exchanges the heat on the tank body and cools the tank body. The coolant after heat exchange flows back to the inside of the metal water tank, and heat is exchanged with the heat of the metal water tank through the cooling fins. The output shaft of the water pump rotates while driving the rotating rod to rotate synchronously. The rotating rod drives one of the pulleys to rotate, and the belt friction transmission is used to transmit the synchronous rotation of the pulleys on the two circular shafts, so that the two circular shafts rotate along the bracket respectively, and drive the fan blades to rotate synchronously. The rotating fan blades push the air between the two adjacent cooling fins to circulate, cool down the cooling fins, and then cool down the metal water tank and the coolant inside it.

[0019] Beneficial effects of the present invention: 1. In the present invention, the lithium iron phosphate production material to be ground is transported to the inside of the tank body, and then the driving motor drives the rotating shaft to rotate, driving the connecting shaft and the cone block to rotate synchronously, so that the connecting shaft drives the rolling wheel to move, and the rolling wheel is squeezed with the lithium iron phosphate material during the movement, so that the rolling wheel rotates to extrude and grind the lithium iron phosphate, and the lithium iron phosphate material ground to a suitable particle size passes through the first sieve hole of the cone and falls below, completing the initial grinding, thereby improving the ability to control the particle size of the lithium iron phosphate material, ensuring that the particle size of the material is evenly distributed, and avoiding the problem of over-grinding or under-grinding; the outer peripheral wall of the rotating rolling wheel slides with the inner wall of the scraper, and the lithium iron phosphate material attached to the outer peripheral wall of the rolling wheel is scraped off by the scraper, and the aperture of the first sieve hole gradually decreases from the inside to the outside, thereby improving the pass rate of the first sieve hole, reducing the risk of clogging, and improving the filtering effect.

[0020] 2. In the present invention, the cone block rotates while driving the connecting block to move synchronously, so that the connecting block drives the scraper to rotate. When the scraper moves, the sliding part slides with the wall of the conical groove, so that the lithium iron phosphate material inside the conical groove is scooped up by the turning part and falls down again after passing over the top surface of the turning part. During the scooping process, the crushed and agglomerated lithium iron phosphate is cut and broken by the dividing knife. At the same time, the accumulated lithium iron phosphate material is pushed by the pushing part, so that the material with a suitable particle size enters the first sieve hole. The material that fails to pass through the first sieve hole continues to accumulate to the upper end of the pushing part and then enters the turning part to fall back to be crushed and ground, until it is ground to a suitable particle size and then enters the first sieve hole to enter the next step, thereby ensuring the crushing effect of the material in the crushing and grinding process, improving the processing efficiency, reducing the occurrence of material agglomeration, and ensuring the consistency of material quality.

[0021] 3. In the present invention, the lithium iron phosphate material that has completed the initial grinding falls into the U-shaped groove of the fine crushing disk, and the rotating shaft rotates to drive the rotating disk to rotate. The rotating disk drives the gear ring to rotate, and the gear ring is meshed to the gear to rotate, so that the gear drives the crushing roller to rotate along the protective cover and the fine crushing disk, and the crushing roller crushes the lithium iron phosphate material at the lower end of the U-shaped groove; the rotating crushing roller drives the C-shaped flap to slide on the inner wall of the U-shaped groove, flips the lithium iron phosphate material during crushing, and further crushes the lithium iron phosphate material until it is crushed to a suitable particle size and then passes through the first conical sieve hole and falls into the lower end, which facilitates continuous fine crushing. The C-shaped flap reduces the accumulation and agglomeration of the material during the fine crushing process, ensures that the material is evenly affected by the crushing roller, improves the fine crushing efficiency and uniformity, reduces the risk of clogging of the material during the fine crushing and discharge process, and ensures the continuity and stability of the fine crushing process.

[0022] 4. In the present invention, the rotating shaft drives the grinding wheel to move through the supporting member, so that the grinding wheel and the inner wall edge of the grinding groove are in friction contact and then rotated, so that the edge of the moving grinding wheel grinds the finely crushed lithium iron phosphate material again, and after grinding to a suitable particle size, the material passes through the second conical sieve hole and falls into the lower end, and is discharged from the discharge pipe to the outside; while the rotating shaft drives the grinding wheel to move, the triangular push block is driven by the connecting rod to slide along the groove wall at the outer end of the grinding groove, scooping up the lithium iron phosphate material and turning it over the triangular push block, and at the same time, the triangular push block pushes the lithium iron phosphate material to move to the second conical sieve hole in the middle of the second grinding seat, so that the lithium iron phosphate material passes through the second conical sieve hole for filtering and screening, and the material with a suitable particle size passes through the second conical sieve hole and falls into the lower end for the next process, further improving the grinding effect and product quality, and improving the passing rate of the second conical sieve hole, so that the particle size of the lithium iron phosphate material finally obtained is more uniform and fine.

[0023] 5. In the present invention, after the metal heat-conducting pipe is installed on the outer wall of the tank body, the coolant is filled into the metal water tank through the pipeline, and the coolant in the metal water tank is sucked and transported to the metal heat-conducting pipe by the water pump. The coolant in the metal heat-conducting pipe exchanges the heat on the tank body, cools the tank body, reduces the influence of temperature on the lithium iron phosphate material in the tank body, and ensures the stability of the grinding process and the quality of the material.

[0024] 6. In the present invention, the coolant after heat exchange flows back to the inside of the metal water tank, and the heat of the metal water tank is heat exchanged through the heat dissipation fins, so that the recycling of the coolant is realized. The output shaft of the water pump rotates and drives the rotating rod to rotate synchronously. The rotating rod drives one of the pulleys to rotate, and the pulleys on the two circular shafts are transmitted to rotate synchronously through the belt friction, so that the two circular shafts rotate along the bracket respectively, and drive the fan blades to rotate synchronously. The rotating fan blades promote the air between the two adjacent heat dissipation fins to circulate, cool the heat dissipation fins, and then cool the metal water tank and the coolant inside it, thereby enhancing the heat dissipation effect of the heat dissipation fins, maintaining the continuous and stable operation of the cooling system, and reducing the problems of material deterioration or reduction of grinding efficiency caused by excessive temperature. The stable grinding environment helps to improve the uniformity and particle size control accuracy of the product, thereby ensuring the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the interior of the tank structure of the present invention; Figure 3 It is a schematic diagram of the structure of the rolling wheel of the present invention; Figure 4 It is a schematic structural diagram of the first grinding assembly of the present invention; Figure 5It is a schematic structural diagram of the first grinding seat of the present invention; Figure 6 A bottom-up stereoscopic view of the truncated cone structure of the present invention; Figure 7 A bottom-up stereoscopic view of the scraper structure of the present invention; Figure 8 This is a schematic diagram of the structure of the fine crushing component of the present invention; Fig. 9 It is a bottom-up stereoscopic view of the turntable structure of the present invention; Fig.10 is a schematic structural diagram of a second grinding assembly of the present invention; Fig.11 It is a schematic structural diagram of the second grinding seat of the present invention; Fig.12 It is a schematic diagram of the cooling assembly structure of the present invention; Fig.13 It is a schematic diagram of the installation frame structure of the present invention; Fig.14 It is a schematic diagram of the fan blade structure of the present invention.

[0026] In the figure: 1, tank body; 2, tank cover; 3, rotating shaft; 4, first grinding assembly; 401, first grinding seat; 402, conical groove; 403, rolling wheel; 404, cone block; 405, connecting block; 406, scraper; 4061, sliding part; 4062, pushing part; 4063, turning part; 4064, curved part; 407, dividing knife; 408, scraper; 409, truncated cone; 410, first sieve hole; 411, connecting shaft; 5, fine crushing assembly; 501, fine crushing disk; 502, U-shaped groove; 503, crushing roller; 504, protective cover; 505, rotating disk; 506, gear ring; 507, gear; 508, C-shaped flap; 509, first conical sieve hole; 6, second grinding assembly; 601, grinding wheel; 602, second grinding seat; 603, grinding groove; 604, support; 605, triangular push block; 606, connecting rod; 607, second conical sieve hole; 7, cooling assembly; 701, metal heat pipe; 702, metal water tank; 703, pipeline; 704, water pump; 705, cooling fin; 706, mounting frame; 707, bracket; 708, round shaft; 709, fan blade; 710, rotating rod; 711, pulley; 712, belt; 8, buckle; 9, feed hopper; 10, discharge pipe; 11, support leg; 12, drive motor; 13, fixing block. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1, as Figures 1 to 7As shown, this embodiment provides a grinding device and a grinding method for lithium iron phosphate production, including a tank body 1, a driving assembly, a first grinding assembly 4, and a tank cover 2 is installed on the top of the tank body 1; The driving assembly includes a driving motor 12 mounted on the top of the tank cover 2, and the output shaft of the driving motor 12 is fixed with a rotating shaft 3, and the rotating shaft 3 extends vertically into the interior of the tank body 1; The first grinding assembly 4 is mounted on the rotating shaft 3. The first grinding assembly 4 includes a first grinding seat 401, a conical block 404, a truncated cone 409 and a rolling assembly. The first grinding seat 401 is rotatably sleeved on the rotating shaft 3. The outer peripheral wall of the first grinding seat 401 is fixed on the inner wall of the tank body 1. The top surface of the first grinding seat 401 is provided with a conical groove 402. The conical block 404 is fixedly sleeved on the rotating shaft 3. A scraper 406 is fixedly provided on the outer peripheral wall of the conical block 404 through a connecting block 405. The bottom surface of the scraper 406 is slidably connected to the bottom of the conical groove 402. A plurality of segmentation knives 407 are fixedly provided on the scraper 406. The top of the truncated cone 409 is rotatably connected to the bottom surface of the conical block 404, and the truncated cone 409 is fixedly arranged in the middle of the top surface of the first grinding seat 401. A plurality of first sieve holes 410 are arranged in an annular array on the outer peripheral wall of the truncated cone 409, and the aperture of the first sieve holes 410 gradually decreases from the inside to the outside; The rolling assembly includes a connecting shaft 411 fixed on the rotating shaft 3, and a rolling wheel 403 rotatably connected to the connecting shaft 411. A scraper 408 is fixed on the outer peripheral wall of the frustum 409, and the inner wall of the scraper 408 is in sliding contact with the outer peripheral wall of the rolling wheel 403.

[0029] The scraper 406 is arranged in an S shape, and a sliding portion 4061 is provided on the scraper 406. The sliding portion 4061 is inclined and is slidably connected to the groove wall of the conical groove 402. The scraper 406 is provided with a pushing portion 4062, and the thickness of the pushing portion 4062 gradually decreases along its S-shaped path. The top surface of the scraper 406 is provided with a turning portion 4063, and a plurality of dividing knives 407 are respectively installed on the top surface of the turning portion 4063. The scraper 406 is provided with a curved portion 4064, and the height of the curved portion 4064 gradually decreases along its S-shaped path, thereby ensuring the crushing effect of the material during the rolling and grinding process, improving the processing efficiency, and reducing the occurrence of material agglomeration.

[0030] The tank cover 2 is fixedly connected to the tank body 1 by a buckle 8, a feed hopper 9 with a valve is installed on the top surface of the tank cover 2, a discharge pipe 10 with a valve is installed on the bottom surface of the tank body 1 through a mounting seat, a plurality of legs 11 are fixedly arranged on the bottom surface of the tank body 1, a fixed block 13 is installed at the lower end of the tank body 1, and the outer peripheral wall at the lower end of the rotating shaft 3 is rotatably connected to the fixed block 13.

[0031] During the initial grinding, the lithium iron phosphate production material to be ground is first transported to the inside of the tank body 1, and then the drive motor 12 drives the rotating shaft 3 to rotate, driving the connecting shaft 411 and the conical block 404 to rotate synchronously, so that the connecting shaft 411 drives the rolling wheel 403 to move, and the rolling wheel 403 is squeezed with the lithium iron phosphate material during the movement, so that the rolling wheel 403 rotates to extrude and grind the lithium iron phosphate, and the lithium iron phosphate material ground to a suitable particle size passes through the first sieve hole 410 of the frustum 409 and falls below, completing the initial grinding, thereby improving the ability to control the particle size of the lithium iron phosphate material, ensuring that the particle size of the material is evenly distributed, and avoiding the problem of over-grinding or under-grinding; Before rolling and grinding, the tank cover 2 and the tank body 1 are fixed by the buckle 8, and the lithium iron phosphate material is fed through the feed hopper 9. When the shaft 3 drives the connecting shaft 411 and the conical block 404 to rotate, the conical block 404 drives the scraper 408 to move synchronously, so that the outer peripheral wall of the rotating rolling wheel 403 slides with the inner wall of the scraper 408, and the lithium iron phosphate material attached to the outer peripheral wall of the rolling wheel 403 is scraped off by the scraper 408. The aperture of the first sieve hole 410 gradually decreases from the inside to the outside, thereby improving the passing rate of the first sieve hole 410, reducing the risk of clogging, and improving the filtering effect; When the conical block 404 rotates, it drives the connecting block 405 to move synchronously, so that the connecting block 405 drives the scraper 406 to rotate. When the scraper 406 moves, it slides with the groove wall of the conical groove 402 through the sliding part 4061, so that the lithium iron phosphate material inside the conical groove 402 is scooped up by the turning part 4063 and falls back after passing over the top surface of the turning part 4063. During the scooping process, the crushed and agglomerated lithium iron phosphate is cut and broken by the dividing knife 407. At the same time, the accumulated lithium iron phosphate material is pushed by the pushing part 4062, so that the material with a suitable particle size enters the first sieve hole 410. The material that fails to pass through the first sieve hole 410 continues to accumulate at the upper end of the pushing part 4062 and then enters the turning part 4063 to fall back for crushing and grinding until it is ground to a suitable particle size and then enters the first sieve hole 410 to enter the next step, thereby ensuring the crushing effect of the material during the crushing and grinding process, improving the processing efficiency, reducing the occurrence of material agglomeration, and ensuring the consistency of material quality.

[0032] Embodiment 2, as Figure 1 , Figure 2 , Figure 8 and Fig. 9As shown, this embodiment is based on the previous embodiment, and is different from the previous embodiment in that a fine crushing component 5 is provided inside the tank body 1, and the fine crushing component 5 includes a fine crushing disk 501, and the outer peripheral wall of the fine crushing disk 501 is fixedly arranged on the inner wall of the tank body 1, and the fine crushing disk 501 is rotatably sleeved on the rotating shaft 3, and a protective cover 504 is fixedly provided on the top surface of the middle part of the fine crushing disk 501, and the middle part of the protective cover 504 and the middle part of the fine crushing disk 501 are rotatably connected to the outer peripheral wall of the rotating shaft 3 respectively, and a plurality of crushing rollers 503 are rotatably connected to the protective cover 504 in an annular array structure, and the outer peripheral wall of one end of the crushing roller 503 away from the protective cover 504 is rotatably connected to the fine crushing disk 501.

[0033] A turntable 505 is provided inside the protective cover 504, and a gap is left between the outer peripheral wall of the turntable 505 and the inner wall of the protective cover 504. The middle part of the turntable 505 is fixedly connected to the outer peripheral wall of the rotating shaft 3, and a gear ring 506 is fixedly provided on the bottom surface of the turntable 505. A gear 507 is fixedly connected to the crushing roller 503 located inside the protective cover 504, and the upper ends of multiple gears 507 are respectively meshed with the gear ring 506. A C-shaped flap 508 is fixedly provided on the crushing roller 503, and the outer peripheral wall of the C-shaped flap 508 is slidably connected to the inner wall of the U-shaped groove 502. The cross-section of the lower end of the U-shaped groove 502 is conical, and multiple first conical sieve holes 509 are opened at the bottom of the U-shaped groove 502, and the aperture of the first conical sieve holes 509 gradually increases from top to bottom; the fine crushing efficiency and uniformity are improved, and the risk of clogging of materials during fine crushing and discharge is reduced.

[0034] During fine crushing, the lithium iron phosphate material that has completed the initial grinding falls into the U-shaped groove 502 of the fine crushing disk 501, and the rotating shaft 3 rotates to drive the rotating disk 505 to rotate. The rotating disk 505 rotates while driving the ring gear 506 to rotate accordingly. The ring gear 506 meshes with the gear 507 to rotate, so that the gear 507 drives the crushing roller 503 to rotate along the protective cover 504 and the fine crushing disk 501, and the crushing roller 503 crushes the lithium iron phosphate material at the lower end of the U-shaped groove 502; The rotating crushing roller 503 drives the C-shaped flap 508 to slide on the inner wall of the U-shaped groove 502, flipping the lithium iron phosphate material during crushing, so that the lithium iron phosphate material is further crushed until it is crushed to a suitable particle size and then passes through the first conical sieve hole 509 and falls into the lower end, which facilitates continuous crushing processing. The C-shaped flap 508 reduces the accumulation and agglomeration of materials during the crushing process, ensures that the materials are evenly affected by the crushing roller 503, improves the crushing efficiency and uniformity, reduces the risk of blockage of materials during crushing and discharge, and ensures the continuity and stability of the crushing process.

[0035] Embodiment three, as Figure 1 , Figure 2 , Fig.10 and Fig.11As shown, this embodiment is based on the previous embodiment, and is different from the previous embodiment in that a second grinding assembly 6 is provided at the lower end of the inner part of the tank body 1, and the second grinding assembly 6 includes a second grinding seat 602, and the outer peripheral wall of the second grinding seat 602 is fixedly arranged on the inner wall of the tank body 1, and a grinding groove 603 is provided on the second grinding seat 602, and a grinding wheel 601 is frictionally contacted at the edge of the inner wall of the grinding groove 603, and a support member 604 is rotatably connected to the middle part of the grinding wheel 601, and the support member 604 is fixedly arranged on the outer peripheral wall of the rotating shaft 3; One end of the grinding groove 603 close to the inner wall of the tank body 1 is slidably connected to a triangular push block 605, on which a connecting rod 606 is fixed, and one end of the connecting rod 606 away from the triangular push block 605 is fixed on the outer peripheral wall of the rotating shaft 3, and the top surface of the second grinding seat 602 is in a ring array structure with a plurality of second conical sieve holes 607, and the aperture of the second conical sieve holes 607 gradually increases from top to bottom; the edge of the moving grinding wheel 601 grinds the crushed lithium iron phosphate material again, and the triangular push block 605 pushes the lithium iron phosphate material through the second conical sieve holes 607 for filtering and screening.

[0036] During re-grinding, the rotating shaft 3 drives the grinding wheel 601 to move through the support 604, so that the grinding wheel 601 is in friction contact with the inner wall edge of the grinding groove 603 and then rotates, so that the edge of the moving grinding wheel 601 grinds the finely crushed lithium iron phosphate material again, and after being ground to a suitable particle size, it passes through the second conical sieve hole 607 and falls into the lower end, and is discharged from the discharge pipe 10 to the outside; While the rotating shaft 3 drives the grinding wheel 601 to move, the connecting rod 606 drives the triangular push block 605 to slide along the outer end groove wall of the grinding groove 603, scooping up the lithium iron phosphate material and turning it over the triangular push block 605. At the same time, the triangular push block 605 pushes the lithium iron phosphate material to move toward the second conical sieve hole 607 in the middle of the second grinding seat 602, so that the lithium iron phosphate material is filtered and screened through the second conical sieve hole 607, and the material with a suitable particle size passes through the second conical sieve hole 607 and falls into the lower end for the next process, which further improves the grinding effect and product quality, and improves the pass rate of the second conical sieve hole 607, so that the particle size of the final lithium iron phosphate material is more uniform and fine.

[0037] Embodiment 4, as Figure 1 , Fig.12 , Fig.13 and Fig.14As shown, this embodiment is based on the previous embodiment, and is different from the previous embodiment in that the cooling component 7 includes a metal water tank 702, which is fixedly mounted on the outer peripheral wall of the lower end of the tank body 1, and is connected to a pipe 703 with a valve, and a water pump 704 is installed on the top surface of the metal water tank 702, and the water inlet end of the water pump 704 is connected to the inside of the metal water tank 702, and the water outlet end of the water pump 704 is connected to one end of a metal heat pipe 701, and the other end of the metal heat pipe 701 is connected to the inside of the lower end of the metal water tank 702, and a plurality of cooling fins 705 are fixedly mounted on the side wall of the metal water tank 702; the heat on the tank body 1 is exchanged by the coolant inside the metal heat pipe 701, and the tank body 1 is cooled, thereby reducing the influence of temperature on the lithium iron phosphate material inside the tank body 1.

[0038] A mounting frame 706 is fixedly provided on the metal water tank 702, and a bracket 707 is fixedly provided inside the mounting frame 706. Two circular shafts 708 are rotatably connected to the bracket 707. A fan blade 709 is sleeved on the outer peripheral wall of one end of the circular shaft 708. A rotating rod 710 is coaxially connected to the output end of the water pump 704. Pulleys 711 are respectively sleeved on the outer peripheral wall of the rotating rod 710 and the outer peripheral wall of the other end of the circular shaft 708. The wheel grooves of the multiple pulleys 711 are all frictionally driven by belts 712; the heat dissipation effect of the heat dissipation fins 705 is enhanced, the continuous and stable operation of the cooling system is maintained, and problems such as material deterioration or reduced grinding efficiency due to excessive temperature are reduced.

[0039] During the cooling process, the heat generated when the lithium iron phosphate material is ground is transferred to the tank body 1. After the metal heat pipe 701 is installed on the outer wall of the tank body 1, the coolant is filled into the metal water tank 702 through the pipe 703, and the coolant in the metal water tank 702 is sucked and transported to the metal heat pipe 701 through the water pump 704. The heat on the tank body 1 is exchanged by the coolant in the metal heat pipe 701, and the tank body 1 is cooled, thereby reducing the influence of temperature on the lithium iron phosphate material in the tank body 1, and ensuring the stability of the grinding process and the quality of the material; After the heat exchange, the coolant flows back to the inside of the metal water tank 702, and the heat of the metal water tank 702 is heat exchanged through the heat dissipation fins 705, thereby realizing the recycling of the coolant. The output shaft of the water pump 704 rotates while driving the rotating rod 710 to rotate synchronously. The rotating rod 710 drives one of the pulleys 711 to rotate, and the pulleys 711 on the two circular shafts 708 are frictionally transmitted by the belt 712 to rotate synchronously, so that the two circular shafts 708 rotate along the bracket 707 respectively, and drive the fan blades 709 to rotate synchronously. The rotating fan blades 709 promote the circulation of air between the two adjacent heat dissipation fins 705, cool the heat dissipation fins 705, and then cool the metal water tank 702 and the coolant inside it, thereby enhancing the heat dissipation effect of the heat dissipation fins 705, maintaining the continuous and stable operation of the cooling system, and reducing the problems of material deterioration or reduced grinding efficiency caused by excessive temperature. The stable grinding environment helps to improve the uniformity and particle size control accuracy of the product, thereby ensuring the quality of the final product.

[0040] Working principle: During the initial grinding, the lithium iron phosphate production material to be ground is first transported to the inside of the tank body 1, and then the drive motor 12 drives the rotating shaft 3 to rotate, driving the connecting shaft 411 and the conical block 404 to rotate synchronously, so that the connecting shaft 411 drives the rolling wheel 403 to move, and the rolling wheel 403 is squeezed with the lithium iron phosphate material during the movement, so that the rolling wheel 403 rotates to extrude and grind the lithium iron phosphate, and the lithium iron phosphate material ground to a suitable particle size passes through the first sieve hole 410 of the frustum 409 and falls below, completing the initial grinding, thereby improving the ability to control the particle size of the lithium iron phosphate material, ensuring that the particle size of the material is evenly distributed, and avoiding the problem of over-grinding or under-grinding; Before rolling and grinding, the tank cover 2 and the tank body 1 are fixed by the buckle 8, and the lithium iron phosphate material is fed through the feed hopper 9. When the shaft 3 drives the connecting shaft 411 and the conical block 404 to rotate, the conical block 404 drives the scraper 408 to move synchronously, so that the outer peripheral wall of the rotating rolling wheel 403 slides with the inner wall of the scraper 408, and the lithium iron phosphate material attached to the outer peripheral wall of the rolling wheel 403 is scraped off by the scraper 408. The aperture of the first sieve hole 410 gradually decreases from the inside to the outside, thereby improving the passing rate of the first sieve hole 410, reducing the risk of clogging, and improving the filtering effect; The cone block 404 rotates and drives the connecting block 405 to move synchronously, so that the connecting block 405 drives the scraper 406 to rotate. When the scraper 406 moves, it slides with the groove wall of the conical groove 402 through the sliding part 4061, so that the lithium iron phosphate material inside the conical groove 402 is scooped up by the turning part 4063 and falls down again after passing over the top surface of the turning part 4063. In the process of scooping up, the crushed and agglomerated lithium iron phosphate is cut and broken by the dividing knife 407. At the same time, the accumulated lithium iron phosphate material is pushed by the pushing part 4062, so that the material with a suitable particle size enters the first sieve hole 410. The material that fails to pass through the first sieve hole 410 continues to accumulate at the upper end of the pushing part 4062 and then enters the turning part 4063 to fall back for rolling and grinding, until it is ground to a suitable particle size and then enters the first sieve hole 410 to enter the next step, thereby ensuring the crushing effect of the material during the rolling and grinding process, improving the processing efficiency, and ensuring the consistency of the material quality. During fine crushing, the lithium iron phosphate material that has completed the initial grinding falls into the U-shaped groove 502 of the fine crushing disk 501, and the rotating shaft 3 rotates to drive the rotating disk 505 to rotate. The rotating disk 505 rotates while driving the ring gear 506 to rotate accordingly. The ring gear 506 meshes with the gear 507 to rotate, so that the gear 507 drives the crushing roller 503 to rotate along the protective cover 504 and the fine crushing disk 501, and the crushing roller 503 crushes the lithium iron phosphate material at the lower end of the U-shaped groove 502; The rotating crushing roller 503 drives the C-shaped flap 508 to slide on the inner wall of the U-shaped groove 502, flipping the lithium iron phosphate material during crushing, so that the lithium iron phosphate material is further crushed until it is crushed to a suitable particle size and then passes through the first conical sieve hole 509 and falls into the lower end, which facilitates continuous crushing processing. The C-shaped flap 508 reduces the accumulation and agglomeration of materials during the crushing process, ensures that the materials are evenly affected by the crushing roller 503, improves the crushing efficiency and uniformity, reduces the risk of blockage of materials during crushing and discharge, and ensures the continuity and stability of the crushing process.

[0041] During re-grinding, the rotating shaft 3 drives the grinding wheel 601 to move through the support 604, so that the grinding wheel 601 is in friction contact with the inner wall edge of the grinding groove 603 and then rotates, so that the edge of the moving grinding wheel 601 grinds the finely crushed lithium iron phosphate material again, and after being ground to a suitable particle size, it passes through the second conical sieve hole 607 and falls into the lower end, and is discharged from the discharge pipe 10 to the outside; While the rotating shaft 3 drives the grinding wheel 601 to move, the connecting rod 606 drives the triangular push block 605 to slide along the outer end groove wall of the grinding groove 603, scooping up the lithium iron phosphate material and turning it over the triangular push block 605. At the same time, the triangular push block 605 pushes the lithium iron phosphate material to move toward the second conical sieve hole 607 in the middle of the second grinding seat 602, so that the lithium iron phosphate material is filtered and screened through the second conical sieve hole 607, and the material with a suitable particle size passes through the second conical sieve hole 607 and falls into the lower end for the next process, which further improves the grinding effect and product quality, and improves the pass rate of the second conical sieve hole 607, so that the particle size of the final lithium iron phosphate material is more uniform and fine.

[0042] During the cooling process, the heat generated when the lithium iron phosphate material is ground is transferred to the tank body 1. After the metal heat pipe 701 is installed on the outer wall of the tank body 1, the coolant is filled into the metal water tank 702 through the pipe 703, and the coolant in the metal water tank 702 is sucked and transported to the metal heat pipe 701 through the water pump 704. The heat on the tank body 1 is exchanged by the coolant in the metal heat pipe 701, and the tank body 1 is cooled, thereby reducing the influence of temperature on the lithium iron phosphate material in the tank body 1, and ensuring the stability of the grinding process and the quality of the material; After the heat exchange, the coolant flows back to the inside of the metal water tank 702, and the heat of the metal water tank 702 is heat exchanged through the heat dissipation fins 705, thereby realizing the recycling of the coolant. The output shaft of the water pump 704 rotates while driving the rotating rod 710 to rotate synchronously. The rotating rod 710 drives one of the pulleys 711 to rotate, and the pulleys 711 on the two circular shafts 708 are frictionally transmitted by the belt 712 to rotate synchronously, so that the two circular shafts 708 rotate along the bracket 707 respectively, and drive the fan blades 709 to rotate synchronously. The rotating fan blades 709 promote the circulation of air between the two adjacent heat dissipation fins 705, cool the heat dissipation fins 705, and then cool the metal water tank 702 and the coolant inside it, thereby enhancing the heat dissipation effect of the heat dissipation fins 705, maintaining the continuous and stable operation of the cooling system, and reducing the problems of material deterioration or reduced grinding efficiency caused by excessive temperature. The stable grinding environment helps to improve the uniformity and particle size control accuracy of the product, thereby ensuring the quality of the final product.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A grinding device for lithium iron phosphate production, characterized in that: include: A tank body (1) with a tank cover (2) mounted on the top; A driving assembly, comprising a driving motor (12) mounted on the top of the tank cover (2), wherein an output shaft of the driving motor (12) is fixedly provided with a rotating shaft (3), and the rotating shaft (3) extends vertically into the interior of the tank body (1); The first grinding assembly (4) is mounted on the rotating shaft (3), and comprises: A first grinding seat (401), the first grinding seat (401) is rotatably sleeved on the rotating shaft (3), the outer peripheral wall of the first grinding seat (401) is fixedly mounted on the inner wall of the tank body (1), and the top surface of the first grinding seat (401) is provided with a conical groove (402); A conical block (404) is fixedly sleeved on the rotating shaft (3); a scraper (406) is fixedly provided on the outer peripheral wall of the conical block (404) via a connecting block (405); the bottom surface of the scraper (406) is slidably connected to the bottom of the conical groove (402); and a plurality of dividing knives (407) are fixedly provided on the scraper (406); A truncated cone (409), the top of which is rotatably connected to the bottom surface of the conical block (404), and the truncated cone (409) is fixedly arranged in the middle of the top surface of the first grinding seat (401), and a plurality of first sieve holes (410) are arranged in an annular array on the outer peripheral wall of the truncated cone (409), and the aperture of the first sieve holes (410) gradually decreases from the inside to the outside; The rolling assembly comprises a connecting shaft (411) fixedly mounted on a rotating shaft (3), and a rolling wheel (403) rotatably connected to the connecting shaft (411); a scraper (408) is fixedly mounted on the outer peripheral wall of the truncated cone (409); and the inner wall of the scraper (408) is in sliding contact with the outer peripheral wall of the rolling wheel (403).

2. The grinding device for lithium iron phosphate production according to claim 1, characterized in that: The scraper (406) is arranged in an S shape, and a sliding portion (4061) is provided on the scraper (406), and the sliding portion (4061) is inclined, and the sliding portion (4061) is slidably connected to the groove wall of the conical groove (402). The scraper (406) is provided with a pushing portion (4062), and the thickness of the pushing portion (4062) gradually decreases along its S-shaped path. The top surface of the scraper (406) is provided with a turning portion (4063), and a plurality of split knives (407) are respectively installed on the top surface of the turning portion (4063). The scraper (406) is provided with a curved portion (4064), and the height of the curved portion (4064) gradually decreases along its S-shaped path.

3. The grinding device for lithium iron phosphate production according to claim 2, characterized in that: The tank cover (2) is fixedly connected to the tank body (1) via a buckle (8); a feed hopper (9) with a valve is mounted on the top surface of the tank cover (2); a discharge pipe (10) with a valve is mounted on the bottom surface of the tank body (1) via a mounting seat; a plurality of legs (11) are fixedly arranged on the bottom surface of the tank body (1); a fixing block (13) is mounted at the lower end of the tank body (1); and the outer peripheral wall at the lower end of the rotating shaft (3) is rotatably connected to the fixing block (13).

4. The grinding device for lithium iron phosphate production according to claim 3, characterized in that: A fine crushing assembly (5) is provided inside the tank body (1), and the fine crushing assembly (5) comprises a fine crushing disc (501), the outer peripheral wall of the fine crushing disc (501) is fixedly arranged on the inner wall of the tank body (1), the fine crushing disc (501) is rotatably sleeved on the rotating shaft (3), a protective cover (504) is fixedly arranged on the top surface of the middle part of the fine crushing disc (501), the middle part of the protective cover (504) and the middle part of the fine crushing disc (501) are respectively rotatably connected to the outer peripheral wall of the rotating shaft (3), a plurality of crushing rollers (503) are rotatably connected to the protective cover (504) in an annular array structure, and the outer peripheral wall of one end of the crushing roller (503) away from the protective cover (504) is rotatably connected to the fine crushing disc (501).

5. The grinding device for lithium iron phosphate production according to claim 4, characterized in that: A rotating disk (505) is provided inside the protective cover (504), and a gap is left between the outer peripheral wall of the rotating disk (505) and the inner wall of the protective cover (504). The middle part of the rotating disk (505) is fixedly connected to the outer peripheral wall of the rotating shaft (3). A gear ring (506) is fixedly provided on the bottom surface of the rotating disk (505). A gear (507) is fixedly connected to the crushing roller (503) located inside the protective cover (504), and the upper ends of the plurality of gears (507) are respectively meshed and connected with the gear ring (506). A C-shaped flap (508) is fixedly provided on the crushing roller (503), and the outer peripheral wall of the C-shaped flap (508) is slidably connected to the inner wall of the U-shaped groove (502). The cross section of the lower end of the U-shaped groove (502) is conical. The bottom of the U-shaped groove (502) is provided with a plurality of first conical sieve holes (509), and the aperture of the first conical sieve holes (509) gradually increases from top to bottom.

6. The grinding device for lithium iron phosphate production according to claim 5, characterized in that: A second grinding assembly (6) is provided at the lower end of the interior of the tank body (1), the second grinding assembly (6) comprising a second grinding seat (602), the outer peripheral wall of the second grinding seat (602) being fixedly mounted on the inner wall of the tank body (1), the second grinding seat (602) being provided with a grinding groove (603), the inner wall edge of the grinding groove (603) being in frictional contact with a grinding wheel (601), the middle part of the grinding wheel (601) being rotatably connected with a support member (604), the support member (604) being fixedly mounted on the outer peripheral wall of the rotating shaft (3).

7. The grinding device for lithium iron phosphate production according to claim 6, characterized in that: One end of the grinding groove (603) close to the inner wall of the tank body (1) is slidably connected to a triangular push block (605), a connecting rod (606) is fixedly provided on the triangular push block (605), and one end of the connecting rod (606) away from the triangular push block (605) is fixedly provided on the outer peripheral wall of the rotating shaft (3), and a plurality of second conical sieve holes (607) are provided on the top surface of the second grinding seat (602) in an annular array structure, and the aperture of the second conical sieve holes (607) gradually increases from top to bottom.

8. The grinding device for lithium iron phosphate production according to claim 7, characterized in that: The cooling device also comprises a cooling assembly (7), wherein the cooling assembly (7) comprises a metal water tank (702), the metal water tank (702) being fixedly mounted on the outer peripheral wall at the lower end of the tank body (1), the metal water tank (702) being connected to a pipe (703) with a valve, a water pump (704) being installed on the top surface of the metal water tank (702), the water inlet end of the water pump (704) being connected to the interior of the metal water tank (702), the water outlet end of the water pump (704) being connected to one end of a metal heat conducting pipe (701), the other end of the metal heat conducting pipe (701) being connected to the interior of the lower end of the metal water tank (702), and a plurality of heat dissipation fins (705) being fixedly mounted on the side wall of the metal water tank (702).

9. The grinding device for lithium iron phosphate production according to claim 8, characterized in that: The metal water tank (702) is fixedly provided with a mounting frame (706), the mounting frame (706) having a bracket (707) fixedly provided therein, the bracket (707) being rotatably connected to two circular shafts (708), a fan blade (709) being sleeved on the outer peripheral wall of one end of the circular shaft (708), a rotating rod (710) being coaxially connected to the output end of the water pump (704), the outer peripheral wall of the rotating rod (710) and the outer peripheral wall of the other end of the circular shaft (708) being sleeved with pulleys (711), respectively, and the wheel grooves of the plurality of pulleys (711) are all frictionally driven by belts (712).

10. A grinding method for a grinding device for lithium iron phosphate production, characterized in that: The grinding device for lithium iron phosphate production according to claim 9 comprises the following steps: Initial grinding: after the material is transported into the tank body (1), the driving motor (12) drives the rotating shaft (3) to rotate, so that the conical block (404) and the connecting shaft (411) rotate synchronously, and the connecting shaft (411) drives the rolling wheel (403) to rotate, squeeze and grind the lithium iron phosphate material. The scraper (406) rotates with the conical block (404), scrapes the material in the conical groove (402) and turns it, and the dividing knife (407) cuts the agglomerated material. The pushing part (4062) pushes the material with a suitable particle size to pass through the first sieve hole (410) and fall below. The material that does not meet the standard is turned over again by the turning part (4063) and ground again until the particle size is suitable. Fine crushing: After the initial grinding, the material falls into the U-shaped groove (502) of the fine crushing plate (501), the rotating shaft (3) drives the rotating plate (505) to rotate, driving the gear ring (506) to mesh with the gear (507), driving the crushing roller (503) to rotate and crush the material, and the C-shaped flap (508) turns the material over, and the material passes through the first conical sieve hole (509) and falls into the lower end; Re-grinding: the rotating shaft (3) drives the grinding wheel (601) to move through the support member (604), so that the grinding wheel (601) is pressed against the inner wall edge of the grinding groove (603) and rotates with the movement of the support member (604), and the grinding wheel (601) re-grinds the crushed material, and the triangular push block (605) moves with the grinding wheel (601), scoops up and turns the material, and at the same time pushes the material to move to one side of the second conical sieve hole (607), until the particle size reaches the standard and is discharged from the discharge pipe (10); Cooling treatment: The heat generated during the grinding process is transferred to the tank body (1), and the tank body (1) is cooled by exchanging heat with the coolant through the metal heat pipe (701). The coolant circulates in the metal water tank (702), and the heat dissipation fins (705) dissipate heat and cool the metal water tank (702) and the coolant. The water pump (704) drives the rotating rod (710) to rotate, driving the fan blades (709) to rotate, thereby further cooling the heat dissipation fins (705) and the metal water tank (702).

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