A preparation device for lithium manganese iron phosphate and its use method

Abstract

The present application discloses a preparation device for lithium manganese iron phosphate and a method for using the same, which belongs to the field of electrochemical material manufacturing technology. The invention is used to provide a preparation device for lithium manganese iron phosphate with better mixing and higher mixing efficiency, including a reaction chamber, a driving mechanism provided on the top of the reaction chamber, a heating mechanism and a mixing mechanism provided in the reaction chamber, an output end of the driving mechanism connected to a planetary frame, the planetary frame connected to a stirring assembly, the stirring assembly including a stirring shaft rotatably connected to the planetary frame, a planetary gear provided on the top of the stirring shaft, and a bottom turning assembly rotatably connected to the lower end of the stirring shaft. The present invention provides a bottom turning assembly at the bottom of the stirring assembly, utilizes the turning claws at the bottom of the bottom turning assembly to turn the material at the bottom upward, and the stirring assembly and the bottom turning assembly work simultaneously to effectively increase the direction of the force acting on the material without the stirring mechanism working for a long time, thereby achieving a good mixing effect and improving the mixing efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of electrochemical material manufacturing, and in particular to a preparation device for lithium manganese iron phosphate and a method for using the same. Background Art

[0002] As an important role in the new energy force, electricity's energy storage efficiency and safety have always been technical focuses and difficulties. Lithium iron manganese phosphate, as a battery material, has good energy storage efficiency and safety, and has been increasingly widely used. In the existing technology, there are many ways to prepare lithium iron manganese phosphate. Since the raw materials are mostly solid dry materials, compared with reaction preparation in solution, the contact efficiency between the raw materials needs to rely on the continuous operation of the stirring mechanism.

[0003] However, the existing stirring mechanism has a relatively single stirring direction. Although the material can be made to move relative to each other in two directions by setting an oblique stirring structure, it is still difficult for the material added at the bottom to fully contact with the material added later at the top. If you want to improve the mixing degree, the stirring mechanism needs to work for a long time, which will undoubtedly increase energy consumption and affect output efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a preparation device for lithium manganese iron phosphate with better mixing uniformity and higher mixing efficiency.

[0005] To achieve the above objectives, the present application provides a preparation device for lithium manganese iron phosphate: comprising a reaction chamber, a driving mechanism provided on the top of the reaction chamber, a heating mechanism and a mixing mechanism provided in the reaction chamber, an output end of the driving mechanism being connected to a planetary carrier, the planetary carrier being connected to a stirring assembly, the stirring assembly comprising a stirring shaft rotatably connected to the planetary carrier, a planetary gear being provided on the top of the stirring shaft, the mixing mechanism further comprising a sun gear fixedly connected to the inner wall of the reaction chamber, the sun gear being suitable for meshing with the planetary gear, the stirring shaft being further fixedly connected to a scraper via a stirring rod, suitable for scraping off material adhered to the inner wall of the reaction chamber, the lower end of the stirring shaft being rotatably connected to a bottom turning assembly, the bottom turning assembly comprising a leakage ring, the leakage ring being rotatably connected to the reaction chamber, The bottom surface of the leakage ring is fixedly connected with a temperature probe, a turning claw and a scraping blade, the turning claw extends downward and bends, the scraping blade extends vertically downward and is inclined relative to the radial direction of the leakage ring, and the bottom of the reaction chamber is a base. When the inner arc surface of the turning claw applies force to the material, the scraping blade tends to gather the material to the middle of the base. When the outer arc surface of the turning claw applies force to the material, the scraping blade tends to push the material away from the inner wall of the base. The inner wall of the base is provided with a discharge channel passing through the outer side surface, and the base is provided with a discharge assembly in the discharge channel, which is suitable for changing the opening and closing state of the discharge channel. A feeding mechanism is also provided on the top of the reaction chamber, and solid and liquid raw materials for preparing lithium iron manganese phosphate enter the reaction chamber from above.

[0006] As a preference, the reaction chamber also includes an inner tank fixedly connected to the base, the sun gear includes a limiting ring fixedly connected to the inner wall of the top of the inner tank, the inner wall of the limiting ring has an inner tooth edge, the planetary carrier includes a linkage shaft, the outer side surface of the linkage shaft has two constraint plates respectively located above and below the inner tooth edge, the two constraint plates are provided with eccentric holes at the corresponding positions, the stirring shaft passes through the two eccentric holes in the same vertical direction to form a rotating pair, the planetary gear is located between the two constraint plates, and the outer side surface of the stirring shaft is also fixedly connected with two retaining rings respectively located on the upper surface of the upper constraint plate and the lower surface of the lower constraint plate, for improving the connection stability between the stirring assembly and the planetary carrier.

[0007] As a preferred embodiment, the inner wall of the leakage ring has a hanging plate, which is provided with a through hole, and the lower end of the stirring shaft has an end shaft, which is suitable for cooperating with the through hole to form a rotating pair, and the lower end of the end shaft is fixedly connected to a retaining ring after passing through the through hole; there are several stirring rods on the outer side of the stirring shaft, and several of the stirring rods are perpendicular to the stirring shaft, and the scrapers fixedly connected to the ends of several of the stirring rods are parallel to the stirring shaft, and the side of the scraper is a scraper, which is suitable for approaching the inner wall of the liner, thereby scraping the moist material away from the inner wall of the reaction chamber.

[0008] As a preferred embodiment, the top surface height of the leakage ring gradually decreases from the edge to the middle, the constraint plate is multi-forked, the number of the stirring components corresponds to the number of forks of the constraint plate, and the number of the hanging plates corresponds to the number of the stirring components. There are several turning claws and scraping blades on the bottom surface of the leakage ring, and the turning claws correspond to the hanging plates and are correspondingly located below the hanging plates. Several scraping blades are divided into a number of groups corresponding to the number of the turning claws, and several scraping blades in each group are located between two adjacent turning claws and are equidistantly arranged around the axis of the leakage ring; a slide groove is provided on the inner wall of the inner tank, and a slip ring is provided on the outer side of the leakage ring, which is suitable for fitting with the slide groove to form a rotating pair, thereby limiting the degree of freedom of the bottom turning assembly and improving the smoothness of the bottom turning assembly during movement.

[0009] As a preferred embodiment, the inner bottom of the base has a frustum, and an annular material groove is formed between the outer side surface of the frustum and the inner side wall of the base, the turning claws and the scraping blades are both located in the annular material groove, and the heating mechanism includes an electric heating column and an electric heating ring, the electric heating column is fixedly connected to the top surface of the frustum, and a configuration groove is provided on the outer side surface of the inner tank, which is suitable for accommodating the electric heating ring to form an inner and outer surface, thereby improving the heating efficiency of the material.

[0010] As a preferred embodiment, an insulating tube is further provided on the outer side of the inner liner, and the insulating tube includes a vacuum interlayer barrel fixedly connected to the inner liner, and the top and bottom surfaces of the vacuum interlayer barrel are provided with support rings, and ribs are fixedly connected between the outer side of the vacuum interlayer barrel and the two support rings, and the lower support ring is provided with a connecting hole at the position between the ribs; the number of the temperature probes corresponds to the number of the hanging plates, and a temperature probe is fixedly connected under each of the hanging plates for feedback of the temperature condition of the material to ensure that the material is within a temperature range suitable for reaction.

[0011] As a preferred embodiment, the upper ends of the inner liner and the insulation tube are fixedly connected to an insulation dome, and the top of the insulation dome is provided with an axial hole passing through the inner and outer walls. The driving mechanism includes a reducer fixedly connected to the top surface of the insulation dome, and the bottom surface of the reducer is fixedly connected to an electric motor. The output end of the reducer is fixedly connected to a main shaft, and the main shaft passes through the axial hole and is fixedly connected to the linkage shaft; the feeding mechanism arranged on the side wall of the insulation dome includes a dry material feeding channel and a feeding mechanism, and the feeding mechanism is suitable for injecting liquid reducing agent into the reaction chamber to react with solid powdered raw materials to obtain lithium manganese iron phosphate material.

[0012] As a preferred embodiment, the feeding mechanism includes an injection tube that passes through the side wall of the insulating dome, the upper end of the injection tube has a metering cylinder, the top of the metering cylinder is fixedly connected to a mounting plate through a support column, the mounting plate is fixedly connected to an electric telescopic rod, the movable end of the electric telescopic rod penetrates into the metering cylinder and is fixedly connected to a piston, which is suitable for generating negative pressure in the metering cylinder or applying pressure to the liquid reducing agent, the bottom of the metering cylinder is connected to the main pipeline through a main electric control valve, the lower end of the main pipeline branches into several branch pipes, the end of each branch pipe is connected to a reducing agent storage tank, each branch pipe is provided with a branch electric control valve, and the injection tube is provided with a feeding electric control valve for achieving a fixed proportion and quantitative injection of the liquid reducing agent.

[0013] As a preferred embodiment, the discharge assembly includes a blocking plug and a locking pin, the blocking plug includes an embedded cone, suitable for being embedded in the discharge channel, the embedded cone has an extension plate on the side facing away from the discharge channel, and the extension plate is provided with an inner pin hole and a traction groove; the outer side surface of the base has a guide tube surrounding the discharge channel, and the guide tube is provided with an outer pin hole passing through the inner and outer walls; the locking pin includes a pin plate, suitable for being simultaneously engaged with the outer pin hole and the inner pin hole, and one end of the pin plate is fixedly connected to a handle, which is convenient for disassembly and assembly of the discharge assembly and has high stability after installation.

[0014] The present application also provides a method for preparing the lithium manganese iron phosphate device using the above-mentioned method, the specific steps of which are as follows:

[0015] Step 1: Initialize the device and use the discharge assembly to block the discharge channel so that all electronically controlled valves are in a completely isolated state. The state transitions of all electronically controlled valves are controlled by the industrial computer.

[0016] Step 2: Weigh the powdered solid material and pour it into the reaction chamber through the dry material input channel, then close the dry material input channel and start the heating mechanism to preheat the solid material in preparation for the redox reaction;

[0017] Step 3: Adjust the main electric control valve to the main pipeline connection state, and prepare to obtain a fixed proportion and quantitative liquid reducing agent;

[0018] Step 4: Adjust the branch electric control valve above the first reducing agent storage tank to the branch pipe connection position, start the electric telescopic rod, and drive the piston to generate negative pressure in the main pipe and branch pipe, thereby pumping the first reducing agent into the main pipe and branch pipe according to the volume calculated by weighing. After the piston moves the required distance, close the first branch electric control valve, the electric telescopic rod stops, and a section of the first reducing agent remains in the pipe.

[0019] Step 5: Adjust the branch electric control valve above the second reducing agent storage tank to the branch pipe connection position, start the electric telescopic rod, and drive the piston to create negative pressure in the main pipe and branch pipe, thereby pumping the second reducing agent into the main pipe and branch pipe according to the volume calculated by weighing. After the piston moves the required distance, close the second branch electric control valve, the electric telescopic rod stops, and a section of the second reducing agent remains in the pipe.

[0020] Step 6: Adjust the branch electric control valve above the third reducing agent storage tank to the branch pipe connection position, start the electric telescopic rod, and drive the piston to generate negative pressure in the main pipe and branch pipe, so as to pump the third reducing agent into the main pipe and branch pipe according to the volume calculated by weighing. After the piston moves the required distance, close the third branch electric control valve and the electric telescopic rod stops. At this time, all three reducing agents are in the main pipe and branch pipe, and the liquid level is lower than the main electric control valve. The three reducing agents either remain in the branch pipe or mix in the main pipe.

[0021] Step 7: Adjust the main electric control valve to the state where the metering cylinder is connected to the outside atmosphere and prepare for exhaust;

[0022] Step 8: Start the electric telescopic rod to press the piston down to expel the air in the metering cylinder until the piston contacts the inner bottom surface of the metering cylinder, then adjust the main electric control valve back to the main pipeline connection state, and prepare to transfer the reducing agent from the pipeline to the metering cylinder;

[0023] Step 9: Start the electric telescopic rod again to pull the piston to the upper limit and then stop, so that a vacuum is formed in the metering cylinder. Then adjust the three branch electric control valves at the same time so that the branch pipes are connected to the outside atmosphere. The outside atmospheric pressure will push all the mixed reducing agents in the branch pipes and the main pipe into the metering cylinder. The content of the three reducing agents just corresponds to the solid material weighed at the beginning, and can fully react.

[0024] Step 10: Adjust the main electric control valve to the completely isolated state, adjust the feed electric control valve to the injection pipe connected state, start the electric telescopic rod to press the piston to inject all the mixed reducing agent in the metering cylinder into the reaction chamber, and react with the preheated solid material;

[0025] Step 11: Start the driving mechanism to drive the mixing mechanism to rotate forward, fully mix the solid material and the liquid reducing agent, and carry out a reduction reaction under a high temperature environment, finally obtaining a moist lithium manganese iron phosphate material. The material adhering to the inner wall of the reaction chamber will be scraped off by the scraper with both revolution and rotation;

[0026] Step 12: Remove the discharge assembly, let the driving mechanism drive the mixing mechanism to reverse, cut the wet lithium manganese iron phosphate material outward, and finally discharge it through the discharge channel and guide pipe, and then enter the next drying process.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] (1) By designing a planetary gear structure to drive the stirring component, the stirring component can rotate while revolving, so that the direction of the stirring force is no longer single, which improves the effect of the stirring structure on the material and increases the relative movement amplitude of the material per unit time;

[0029] (2) By setting a bottom-turning assembly at the bottom of the stirring assembly, the material at the bottom is turned upward by using the turning claws at the bottom of the turning assembly to exchange positions with the material added later from above. The stirring assembly and the turning assembly work at the same time, which effectively increases the direction of the force acting on the material. A good mixing effect can be achieved without the stirring mechanism working for a long time. Therefore, the turning assembly improves the mixing efficiency.

[0030] (3) By setting a feeding mechanism on the top of the reaction chamber, the feeding mechanism is driven by an electric telescopic rod and cooperates with a three-way electric control valve. Under the control of an industrial computer, high-precision movements can be achieved, and liquid reducing agent can be injected in a fixed proportion and quantity, effectively reducing the manual participation in the preparation process and making the operation more convenient and quick;

[0031] (4) By setting an inclined scraping blade structure at the bottom of the leakage ring, not only can the material at the bottom of the reaction chamber be gathered to the middle when the mixing mechanism rotates forward, and the material can be turned over by the upward arch of the cone, but also the finished product of lithium manganese iron phosphate can be pushed out of the reaction chamber when the mixing mechanism rotates backward, thereby realizing automatic discharge;

[0032] (5) By designing a double-layer heating structure of electric heating columns and electric heating rings, the heating area of the material is increased, the heating rate is increased, and the preparation efficiency of lithium manganese iron phosphate is further improved. The design has a compact structure, high working stability and good lightweight;

[0033] (6) By providing a heat-insulating structure on the side wall of the reaction chamber, the heat loss in the preparation process is reduced, thereby reducing the energy consumption of the heating mechanism and further reducing the preparation cost of lithium manganese iron phosphate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the lithium manganese iron phosphate preparation device.

[0035] Figure 2 It is a planar cross-sectional view of the device for preparing lithium manganese iron phosphate.

[0036] Figure 3 This is a first schematic diagram of the three-dimensional structure of the driving mechanism and the mixing mechanism of the lithium manganese iron phosphate preparation device.

[0037] Figure 4This is a second schematic diagram of the three-dimensional structure of the driving mechanism and the mixing mechanism of the lithium manganese iron phosphate preparation device.

[0038] Figure 5 This is a schematic diagram of the three-dimensional structure of the stirring assembly and the planetary carrier of the lithium manganese iron phosphate preparation device.

[0039] Figure 6 This is a schematic diagram of the three-dimensional structure of the stirring assembly of the lithium manganese iron phosphate preparation device.

[0040] Figure 7 This is a bottom view of the stirring assembly of the lithium manganese iron phosphate preparation device.

[0041] Figure 8 This is a schematic diagram of the three-dimensional structure of the planetary carrier of the lithium manganese iron phosphate preparation device.

[0042] Figure 9 This is a three-dimensional cross-sectional view of the planetary carrier of the lithium manganese iron phosphate preparation device.

[0043] Figure 10 This is the first perspective view of the folded-down component of the lithium manganese iron phosphate preparation device.

[0044] Figure 11 This is a second view of the three-dimensional structure of the lowered component of the lithium manganese iron phosphate preparation device.

[0045] Figure 12 This is a three-dimensional structural cross-sectional view of the heating mechanism of the lithium manganese iron phosphate preparation device configured in the reaction chamber.

[0046] Figure 13 This is a three-dimensional structural cross-sectional view of the electric heating ring of the lithium manganese iron phosphate preparation device configured outside the inner tank.

[0047] Figure 14 The preparation device of the lithium manganese iron phosphate Figure 13 A partial enlarged view of point A.

[0048] Figure 15 This is a schematic diagram of the three-dimensional structure of the connection between the feeding mechanism and the thermal insulation dome of the lithium manganese iron phosphate preparation device.

[0049] Figure 16 This is a sectional view of the three-dimensional structure of the connection between the feeding mechanism and the thermal insulation dome of the lithium manganese iron phosphate preparation device.

[0050] Figure 17 This is a schematic diagram of the three-dimensional structure of the discharge assembly and the base of the lithium manganese iron phosphate preparation device.

[0051] Figure 18 This is a three-dimensional structural cross-sectional view of the base of the lithium manganese iron phosphate preparation device.

[0052] Figure 19 This is a schematic diagram of the three-dimensional structure of the plug of the lithium manganese iron phosphate preparation device.

[0053] Figure 20 This is a schematic diagram of the three-dimensional structure of the lock pin of the lithium manganese iron phosphate preparation device.

[0054] Figure 21 The figure is a flow chart of a device for preparing lithium manganese iron phosphate.

[0055] In the figure: 1. driving mechanism; 101. main shaft; 102. reducer; 103. motor; 2. reaction chamber; 210. heat-insulating dome; 211. shaft hole; 212. dry material feeding channel; 220. liner; 221. configuration slot; 222. slide; 230. heat-insulating cylinder; 231. vacuum interlayer barrel; 232. support ring; 233. connection hole; 234. rib plate; 240. base; 241. cone; 2 42. Annular trough; 243. Discharge channel; 244. Guide tube; 245. External pin hole; 3. Feeding mechanism; 301. Injection tube; 302. Dosing cylinder; 303. Support column; 304. Mounting plate; 305. Electric telescopic rod; 306. Piston; 307. Main pipeline; 308. Branch pipe; 309. Reductant storage tank; 310. Branch electric control valve; 311. Main electric control valve; 312. Feed electric control valve ; 4. Discharge assembly; 410. Blocking plug; 411. Embedded cone; 412. Extension plate; 413. Inner pin hole; 414. Traction groove; 420. Lock pin; 421. Pin plate; 422. Handle; 5. Heating mechanism; 501. Electric heating column; 502. Electric heating ring; 6. Mixing mechanism; 610. Planet carrier; 611. Linkage shaft; 612. Constraint plate; 613. Eccentric hole; 620. Sun gear; 621. Limiting ring; 622, inner tooth edge; 630, stirring assembly; 631, stirring shaft; 632, planetary gear; 633, stirring rod; 634, scraper; 635, retaining ring; 636, end shaft; 637, retaining ring; 638, scraper; 640, bottom turning assembly; 641, leakage ring; 642, slip ring; 643, hanging plate; 644, through hole; 645, temperature sensor; 646, turning claw; 647, scraping blade. DETAILED DESCRIPTION

[0056] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0057] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0059] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product or apparatus.

[0060] like Figure 1-20 The preparation device of lithium manganese iron phosphate shown includes a reaction chamber 2 placed longitudinally along the axis. The reaction chamber 2 has a high-temperature resistant inner liner 220. The outer side of the inner liner 220 is further provided with an insulating tube 230 for preventing the heat of the inner liner 220 from dissipating outward. The insulating tube 230 includes a vacuum interlayer barrel 231 fixedly connected to the inner liner 220. The vacuum interlayer barrel 231 has at least two layers. The layers are evacuated to form a vacuum, which can effectively reduce the efficiency of heat conduction outward. The top and bottom surfaces of the vacuum interlayer barrel 231 are both provided with coaxial support rings 232. The outer diameter of the ring 232 is significantly larger than that of the vacuum interlayer barrel 231. A rib 234 is fixedly connected between the outer side of the vacuum interlayer barrel 231 and the two support rings 232 to improve the structural strength of the vacuum interlayer barrel 231. This material distribution method can effectively reduce consumables and reduce dead weight, taking into account both high strength and light weight. The lower support ring 232 is provided with a connecting hole 233 between the ribs 234 for bolts and other connecting parts to pass through to fix the lower support ring 232 to the frame or work platform, thereby keeping the entire device stable.

[0061] The top of the reaction chamber 2 is also provided with a feeding mechanism for feeding raw materials for preparing lithium manganese iron phosphate into the reaction chamber 2. The upper ends of the inner liner 220 and the insulation cylinder 230 are fixedly connected with a hemispherical insulation dome 210. The side wall of the insulation dome 210 is also hollow, similar to the sandwich structure of the insulation cylinder 230, and has good thermal insulation performance. In fact, the feeding mechanism is provided on the side wall of the insulation dome 210, including a dry material feeding channel 212 and a feeding mechanism 3, wherein the dry material feeding channel 212 is used to feed the raw materials into the reaction chamber 2. Solid raw materials are added, and the feeding mechanism 3 is used to inject liquid reducing agent into the reaction chamber 2. The specific structure of the feeding mechanism 3 includes an injection pipe 301 that passes through the side wall of the insulation dome 210. The injection pipe 301 obliquely passes through the side wall of the insulation dome 210, with the lower end located inside the insulation dome 210 and the upper end located outside the insulation dome 210. The upper end of the injection pipe 301 has a coaxial quantitative cylinder 302. The quantitative cylinder 302 has a larger diameter and a larger internal volume. The top of the quantitative cylinder 302 is fixedly connected to the support column 303. The mounting plate 304 is fixedly connected to an electric telescopic rod 305, which can accurately control the position. The movable end of the electric telescopic rod 305 is inserted into the quantitative cylinder 302 and is fixedly connected to a piston 306. The outer side of the piston 306 is in close contact with the inner wall of the quantitative cylinder 302 to form an annular sealing surface, which can generate negative pressure in the quantitative cylinder 302 or apply pressure to the liquid reducing agent. The bottom of the quantitative cylinder 302 is connected to the main pipeline 307 through the main electric control valve 311. The lower end of the main pipeline 307 Several branch pipes 308 are branched out, and the end of each branch pipe 308 is connected to a reducing agent storage tank 309. A branch electric-controlled valve 310 is also provided in each branch pipe 308, and a feeding electric-controlled valve 312 is provided in the injection pipe 301. Except for the feeding electric-controlled valve 312, other electric-controlled valves need to adopt a three-way connection, with two ports connected to the pipeline and one port connected to the outside atmosphere. At the same time, either the pipeline is completely isolated, the pipeline is connected internally, or the pipeline is connected to the outside atmosphere. Only one of the three states can exist at the same time.

[0062] A driving mechanism 1 is provided on the top of the reaction chamber 2 for driving the moving structure inside the reaction chamber 2. The driving mechanism 1 includes a reducer 102 fixedly connected to the top surface of the insulation dome 210. The bottom surface of the reducer 102 is fixedly connected to the motor 103. The output end of the motor 103 is connected to the input end of the reducer 102. The motor 103 is used to drive the reducer 102, thereby improving the overall output torque. The output end of the reducer 102 is fixedly connected to the main shaft 101. The top of the insulation dome 210 is provided with an axial hole 211 that passes through the inner and outer walls in the vertical direction. A bearing structure is arranged in the axial hole 211. The main shaft 101 passes through the axial hole 211 and cooperates with the bearing structure to form a rotating pair.

[0063] The reaction chamber 2 is provided with a heating mechanism 5 and a mixing mechanism 6. The heating mechanism 5 is fixed, and the mixing mechanism 6 is movably provided in the reaction chamber 2. The output end of the driving mechanism 1 is connected to a planetary carrier 610. The planetary carrier 610 has a plurality of forks. The forks of the planetary carrier 610 are arranged equidistantly around its own rotation axis. The planetary carrier 610 includes a linkage shaft 611 located in the center. In fact, the main shaft 101 is fixedly connected to the linkage shaft 611 through the shaft hole 211. The planetary carrier 610 is connected to a stirring assembly 630. The stirring assembly 630 includes The stirring shaft 631 is rotatably connected to the planetary frame 610, and the axis of the stirring shaft 631 is parallel to the axis of the linkage shaft 611. The top of the stirring shaft 631 is provided with a planetary gear 632, and the outer side of the planetary gear 632 is provided with a tooth groove. The outer side of the linkage shaft 611 has two constraint plates 612 respectively located above and below the inner tooth edge 622. The constraint plates 612 are fixedly connected to the outer side of the linkage shaft 611 by welding. The constraint plates 612 are multi-branched, and the material can fall to the bottom of the planetary frame 610 through the gap between the forks. The two are approximately The binding plates 612 are provided with eccentric holes 613 at the corresponding positions, and the axis of the eccentric holes 613 is also parallel to the axis of the linkage shaft 611. The stirring shaft 631 passes through the two eccentric holes 613 in the same vertical direction to form a rotating pair. The planetary gear 632 is just located between the two binding plates 612, and the outer side surface of the stirring shaft 631 is also fixedly connected with two clamping rings 635 respectively located on the upper surface of the upper binding plate 612 and the lower surface of the lower binding plate 612. The clamping ring 635 is also welded to the stirring shaft 631 after the stirring shaft 631 is matched with the binding plate 612. The outer surface of the mixing shaft 631 is used to suppress the up and down movement of the mixing shaft 631, and at the same time can disperse the bending stress of the mixing shaft 631 at both ends of the planetary gear 632. The mixing mechanism 6 also includes a sun gear 620 fixedly connected to the inner wall of the reaction chamber 2. The sun gear 620 includes a limiting ring 621 fixedly connected to the inner wall of the top of the inner tank 220. The inner wall of the limiting ring 621 has an inner tooth edge 622, and the inner tooth edge 622 is used to engage with the planetary gear 632. In this way, the mixing component 630 can revolve and rotate at the same time, effectively improving the mixing efficiency.

[0064] The stirring shaft 631 is also fixedly connected to a scraper 634 through a stirring rod 633, which is used to scrape off the wet material adhering to the inner wall of the reaction chamber 2. There are several stirring rods 633 on the outer side of the stirring shaft 631. These stirring rods 633 are perpendicular to the stirring shaft 631, and are parallel to each other and equidistantly arranged. The scraper 634 fixedly connected to the same end of these stirring rods 633 is parallel to the stirring shaft 631. The side of the scraper 634 is an equal-length scraper 638, which can be very close to the inner wall of the inner liner 220, thereby scraping off the material on the inner wall of the inner liner 220. The number of stirring components 630 corresponds to the number of branches of the constraint plate 612. Component 630 is located below the bifurcated end of the constraint plate 612. The heating mechanism 5 includes an electric heating column 501 and an electric heating ring 502, and these stirring components 630 are arranged equidistantly around the electric heating column 501. The stirring components 630 revolve around the electric heating column 501. The outer side of the inner tank 220 is also provided with a configuration groove 221 for accommodating the electric heating ring 502. The electric heating ring 502 is entirely located in the insulation tube 230. The heat generated by the electric heating column 501 diffuses outward, and the heat generated by the electric heating ring 502 gathers inward. The stirring components 630 and the material located between the electric heating column 501 and the electric heating ring 502 can be heated inside and outside, and the heating efficiency will be higher.

[0065] The lower end of the stirring shaft 631 is rotatably connected to a bottom-turning assembly 640 for turning the material at the bottom of the reaction chamber 2 upwards and exchanging it with the material above, thereby increasing the direction of movement of the material and facilitating sufficient mixing of the various raw materials. The specific structure of the bottom-turning assembly 640 includes a leakage ring 641, the top surface height of the leakage ring 641 gradually decreases from the edge to the middle, that is, the upper surface of the leakage ring 641 is inverted conical, which will cause the material to tend to gather toward the middle. The leakage ring 641 is rotatably connected to the reaction chamber 2, and a chute 222 is provided on the inner wall of the liner 220. The outer side surface of the leakage ring 641 has a slip ring 642, which fits perfectly with the chute 222 to form a rotating pair. The bottom of the liner 220 is split and divided into two parts at the chute 222. After the slip ring 642 cooperates with the chute 222, secondary welding or connecting parts are performed. The screw thread 642 is fixed to form an integral body so that the slip ring 642 can be embedded in the slide groove 222 without interference. The inner wall of the leakage ring 641 has a horizontal hanging plate 643. The plane of the hanging plate 643 is perpendicular to the rotation axis of the leakage ring 641. The number of hanging plates 643 corresponds to the number of stirring components 630, and is also used to cooperate with the stirring component 630. The hanging plate 643 is provided with a through hole 644, and the lower end of the stirring shaft 631 has an end shaft 636, which just passes through the through hole 644 to form a rotating pair. The lower end of the end shaft 636 passes through the through hole 644 and is fixedly connected to a retaining ring 637 for providing an auxiliary lifting force to the hanging plate 643 to prevent the hanging plate 643 from bending downward due to the pressure of the material, thereby preventing the hanging plate 643 from separating from the end shaft 636, and ensuring the transmission stability of the stirring component 630 and the bottom turning component 640.

[0066] The bottom surface of the leakage ring 641 is fixedly connected with a temperature probe 645, a turning claw 646 and a scraping blade 647. The temperature probe 645 will be buried in the material and directly contact the material. The temperature probe 645 is connected to the industrial computer to obtain the temperature state of the material in real time, so as to judge whether the reaction temperature of the material is indicated. The number of temperature probes 645 corresponds to the number of hanging plates 643. A temperature probe 645 is fixedly connected to the bottom of each hanging plate 643. Multiple temperature probes 645 work at the same time, which can effectively avoid the problem of single temperature probes. The temperature sensor 645 is damaged and the temperature feedback cannot be obtained. The temperature detection error can also be effectively reduced. The turning claw 646 extends downward and bends into an arc shape. The scraping blade 647 extends vertically downward and is inclined relative to the radial direction of the leakage ring 641. There are several turning claws 646 and scraping blades 647 on the bottom surface of the leakage ring 641, but the turning claw 646 corresponds to the hanging plate 643 and is correspondingly located below the hanging plate 643. The number of scraping blades 647 is an integer multiple of the turning claw 646. These scraping blades 647 are 47 is divided into groups corresponding to the number of turning claws 646. The scraping blades 647 in each group are located between two adjacent turning claws 646 and are arranged equidistantly around the axis of the leakage ring 641. The bottom of the reaction chamber 2 is a base 240 fixedly connected to the inner tank 220. The inner bottom of the base 240 has a coaxial cone 241. In fact, the cone 241 is a frustum. The electric heating column 501 is fixedly connected to the top surface of the cone 241. The inner side wall of the base 240 is a cylindrical surface. The outer side surface of the cone 241 is aligned with the base 220. 40 is formed with an annular groove 242, and the turning claw 646 and the scraping blade 647 are both located in the annular groove 242. Due to the characteristics of the bending direction of the turning claw 646 and the inclined direction of the scraping blade 647, when the inner arc surface of the turning claw 646 applies force to the material, the scraping blade 647 tends to gather the material to the middle of the base 240 to achieve turning; when the outer side arc surface of the turning claw 646 applies force to the material, the scraping blade 647 tends to push the material away from the inner wall of the base 240 to achieve discharge.

[0067] The inner wall of the base 240 is provided with a discharge channel 243 that passes through the outer side, and the finally obtained lithium manganese iron phosphate material is discharged from it. The base 240 is provided with a discharge component 4 in the discharge channel 243 for changing the opening and closing state of the discharge channel 243. Specifically, the discharge component 4 includes a blocking plug 410 and a locking pin 420. The blocking plug 410 includes an embedded cone 411, which can be embedded in the discharge channel 243 to achieve blocking and prevent the material from leaking during the stirring and reaction process. The side of the embedded cone 411 facing away from the discharge channel 243 is provided with an extension plate 412, and the extension plate 412 is provided with an inner pin hole 413 and a traction groove 414. By hooking the traction groove 414, the embedded cone 411 can be fed through the extension plate 412. 11 applies a pulling force; the outer side surface of the base 240 has a guide tube 244 surrounding the discharge channel 243, and the extension plate 412 is located in the guide tube 244. The guide tube 244 is provided with an outer pin hole 245 that passes through the inner and outer walls. There are two outer pin holes 245, which are located on the left and right side walls of the guide tube 244 and are symmetrical about the extension plate 412; the locking pin 420 includes a pin plate 421, which is used to simultaneously engage with the outer pin hole 245 and the inner pin hole 413, thereby limiting the position of the extension plate 412 in the guide tube 244 and preventing the embedded cone 411 from detaching from the discharge channel 243. One end of the pin plate 421 is fixedly connected to a handle 422, which is convenient for applying force to the entire locking pin 420 and facilitating the insertion and extraction operations of the pin plate 421.

[0068] like Figure 21 The method of using the lithium manganese iron phosphate preparation device shown is as follows:

[0069] First, the device is initialized. The discharge channel 243 is blocked using the discharge assembly 4. The discharge channel 243 is first blocked with the blocking plug 410, and then the blocking plug 410 is limited by the locking pin 420. Finally, all the electronically controlled valves are checked to ensure that they are in a completely isolated state. The powdered solid material is weighed to calculate the required ratio of various reducing agents. The powdered solid material is poured into the reaction chamber 2 through the dry material input channel 212, and then the dry material input channel 212 is closed. The heating mechanism 5 is then activated to preheat the solid material.

[0070] Then add the reducing agent into the reaction chamber 2. The first stage is to adjust the main electric control valve 311 to the main pipe 307 connection state; adjust the branch electric control valve 310 above the first reducing agent storage tank 309 to the branch pipe 308 connection position, start the electric telescopic rod 305, drive the piston 306 to generate negative pressure in the main pipe 307 and the branch pipe 308, so that the first reducing agent is pumped into the main pipe 307 and the branch pipe 308 according to the volume calculated by weighing. When the piston 306 moves upward to the required distance, the first reducing agent is sucked in. The amount of the reductant is up to standard, and the first branch electric control valve 310 is immediately closed, and the electric telescopic rod 305 stops; similarly, the branch electric control valve 310 above the second reductant storage tank 309 is adjusted to the branch pipe 308 connection position, and the electric telescopic rod 305 is started again, driving the piston 306 to generate negative pressure in the main pipe 307 and the branch pipe 308, thereby pumping the second reductant into the main pipe 307 and the branch pipe 308 according to the volume calculated by weighing. When the distance moved by the piston 306 reaches the standard, the amount of the second reductant sucked in follows The standard is met, and then the second branch electric control valve 310 is closed, and the electric telescopic rod 305 stops again; then the branch electric control valve 310 above the third reducing agent storage tank 309 is adjusted to the branch pipe 308 connection position, and the electric telescopic rod 305 is started again, driving the piston 306 to generate negative pressure in the main pipe 307 and the branch pipe 308 again, thereby pumping the third reducing agent into the main pipe 307 and the branch pipe 308 according to the volume calculated by weighing. When the distance moved by the piston 306 meets the standard, the amount of the third reducing agent sucked in is When it is enough, the third branch electric control valve 310 is immediately closed, and the electric telescopic rod 305 stops. At this time, the three reducing agents are all in the main pipe 307 and the branch pipe 308 and mixed, and the liquid level is lower than the main electric control valve 311. Since the total volume inside the main pipe 307 and the branch pipe 308 is smaller than the total volume inside the metering cylinder 302, after the three reducing agents are sucked in, the piston 306 has not reached the upper limit in the metering cylinder 302. The piston 306 can continue to move upward to generate negative pressure, thereby sucking in other liquid reagents that may be needed;

[0071] After the above steps have sucked the liquid reducing agent into the pipeline in a quantitative manner according to the proportion, the second stage will begin, and the reducing agent mixture in a specific proportion will be sucked into the metering cylinder 302. The first step of the second stage is to adjust the main electric control valve 311 to the state where the metering cylinder 302 is connected to the outside atmosphere; then start the electric telescopic rod 305 to press the piston 306 to discharge the air in the metering cylinder 302 until the piston 306 contacts the inner bottom surface of the metering cylinder 302, and then adjust the main electric control valve 311 back to the main pipeline 307 connection state; start the electric telescopic rod 305 again to pull the piston 306 to the upper limit position and then stop, so that the air in the metering cylinder 302 is discharged. A vacuum is formed. At this time, the atmospheric pressure inside the pipe connected to the interior of the metering cylinder 302 is significantly lower than the external atmospheric pressure. Then, the three branch electric-controlled valves 310 are adjusted simultaneously to the state where the branch pipe 308 is connected to the external atmosphere. Since the three branch electric-controlled valves 310 have previously separated the branch pipe 308 from the reducing agent storage tank 309, the external atmospheric pressure will push all the mixed reducing agent in the branch pipe 308 and the main pipe 307 into the metering cylinder 302, while the liquid reducing agent in the reducing agent storage tank 309 will not continue to enter. The reducing agent liquid in the branch pipe 308 and the main pipe 307 enters the metering cylinder 302 at a fixed amount.

[0072] Entering the third stage of reducing agent injection, the main electric control valve 311 is adjusted to a completely blocked state, at which time the metering cylinder 302 is isolated from the main pipeline 307. Then, the feed electric control valve 312 is adjusted to a connected state of the injection pipe 301. The electric telescopic rod 305 is activated again to press the piston 306 downward, and the mixed reducing agent in the metering cylinder 302 is completely injected into the reaction chamber 2 to contact the solid material.

[0073] The final stage is the reaction stage between the materials. The driving mechanism 1 will be started to drive the mixing mechanism 6 to rotate forward. Under the horizontal stirring of the stirring component 630 and the longitudinal turning of the turning claw 646 in conjunction with the cone 241, the solid material and the liquid reducing agent will be fully mixed and undergo a sufficient reduction reaction under a high temperature environment, and finally a moist lithium iron manganese phosphate material will be obtained; after the reaction is completed, the discharge component 4 can be removed, the locking pin 420 is first pulled out, and then the blocking plug 410 is pulled out, and then the driving mechanism 1 drives the mixing mechanism 6 to reverse and cut the moist lithium iron manganese phosphate material outward. The finished lithium iron manganese phosphate will be in block form and finally discharged through the discharge channel 243 and the guide pipe 244, and flow to the equipment responsible for the next dehumidification process. In this way, the entire preparation process is completed, and the device can be reinitialized to wait for the next round of preparation work.

[0074] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A device for preparing lithium manganese iron phosphate, characterized in that: The invention comprises a reaction chamber (2), wherein a driving mechanism (1) is provided on the top of the reaction chamber (2), a heating mechanism (5) and a mixing mechanism (6) are provided in the reaction chamber (2), an output end of the driving mechanism (1) is connected to a planetary frame (610), the planetary frame (610) is connected to a stirring assembly (630), the stirring assembly (630) comprises a stirring shaft (631) rotatably connected to the planetary frame (610), a planetary gear (632) is provided on the top of the stirring shaft (631), the mixing mechanism (6) further comprises a sun gear (620) fixedly connected to the inner wall of the reaction chamber (2), the sun gear (620) is suitable for meshing with the planetary gear (632), the stirring shaft (631) is connected to the planetary frame (610), and the stirring shaft (631) is connected to the planetary frame (610). ) is also fixedly connected to a scraper (634) through a stirring rod (633), suitable for scraping off materials adhered to the inner wall of the reaction chamber (2), the lower end of the stirring shaft (631) is rotatably connected to a bottom turning assembly (640), the bottom turning assembly (640) includes a leakage ring (641), the inner wall of the leakage ring (641) has a hanging plate (643), the hanging plate (643) is provided with a through hole (644), the lower end of the stirring shaft (631) has an end shaft (636), suitable for cooperating with the through hole (644) to form a rotating pair, the leakage ring (641) is rotatably connected to the reaction chamber (2), the top surface height of the leakage ring (641) gradually decreases from the edge to the middle, and the bottom surface of the leakage ring (641) is fixed. A temperature probe (645), a material turning claw (646) and a scraping blade (647) are fixedly connected, the material turning claw (646) extends downward and bends, the scraping blade (647) extends vertically downward and is inclined relative to the radial direction of the leakage ring (641), the bottom of the reaction chamber (2) is a base (240), the inner bottom of the base (240) has a cone (241), an annular groove (242) is formed between the outer side surface of the cone (241) and the inner side wall of the base (240), the material turning claw (646) and the scraping blade (647) are both located in the annular groove (242), when the inner arc surface of the material turning claw (646) applies force to the material, the scraping blade (647) tends to The material is gathered toward the center of the base (240). When the outer side arc surface of the turning claw (646) applies force to the material, the scraping blade (647) tends to push the material toward the inner wall of the base (240). The inner wall of the base (240) is provided with a discharge channel (243) passing through the outer side surface. The base (240) is provided with a discharge assembly (4) in the discharge channel (243), which is suitable for changing the opening and closing state of the discharge channel (243). The top of the reaction chamber (2) is also provided with a feeding mechanism. The heating mechanism (5) includes an electric heating column (501) and an electric heating ring (502). The electric heating column (501) is fixedly connected to the top surface of the cone (241).

2. The device for preparing lithium manganese iron phosphate according to claim 1, wherein: The reaction chamber (2) further comprises an inner liner (220) fixedly connected to the base (240), the sun gear (620) comprises a limiting ring (621) fixedly connected to the inner wall of the top of the inner liner (220), the inner wall of the limiting ring (621) having an inner toothed edge (622), the planetary carrier (610) comprising a linkage shaft (611), the outer side surface of the linkage shaft (611) having two constraint plates (612) respectively located above and below the inner toothed edge (622), the two constraint plates (612) both having eccentric holes (613) at aligned positions, the stirring shaft (631) passing through the two eccentric holes (613) in the same vertical direction to form a rotating pair, the planetary gear (632) being located between the two constraint plates (612), and the outer side surface of the stirring shaft (631) further being fixedly connected to two retaining rings (635) respectively located on the upper surface of the upper constraint plate (612) and the lower surface of the lower constraint plate (612).

3. The device for preparing lithium manganese iron phosphate according to claim 2, wherein: The lower end of the end shaft (636) passes through the through hole (644) and is fixedly connected to a retaining ring (637); there are a plurality of stirring rods (633) on the outer side of the stirring shaft (631), and the plurality of stirring rods (633) are perpendicular to the stirring shaft (631); the scrapers (634) fixedly connected to the ends of the plurality of stirring rods (633) are parallel to the stirring shaft (631), and the side of the scraper (634) is a scraper (638) suitable for being close to the inner wall of the inner container (220).

4. The device for preparing lithium manganese iron phosphate according to claim 3, wherein: The constraint plate (612) is multi-branched, the number of the stirring components (630) corresponds to the number of forks of the constraint plate (612), the number of the hanging plates (643) corresponds to the number of the stirring components (630), the leakage ring (641) has a plurality of turning claws (646) and scraping blades (647) on the bottom surface, the turning claws (646) correspond to the hanging plates (643), and are correspondingly located below the hanging plates (643). The plurality of scraping blades (647) are divided into a number of groups corresponding to the number of the material turning claws (646), and the plurality of scraping blades (647) in each group are located between two adjacent material turning claws (646) and are arranged equidistantly around the axis of the leakage ring (641); a sliding groove (222) is provided on the inner wall of the inner liner (220), and a sliding ring (642) is provided on the outer side surface of the leakage ring (641), which is suitable for fitting with the sliding groove (222) to form a rotating pair.

5. The device for preparing lithium manganese iron phosphate according to claim 4, characterized in that: The outer side surface of the inner container (220) is provided with a configuration groove (221) suitable for accommodating the electric heating ring (502).

6. The device for preparing lithium manganese iron phosphate according to claim 5, characterized in that: The outer side surface of the inner liner (220) is further provided with an insulating tube (230), and the insulating tube (230) includes a vacuum interlayer barrel (231) fixedly connected to the inner liner (220), and the top and bottom surfaces of the vacuum interlayer barrel (231) are both provided with support rings (232), and ribs (234) are fixedly connected between the outer side surface of the vacuum interlayer barrel (231) and the two support rings (232), and the lower support ring (232) is provided with a connecting hole (233) at the position between the ribs (234); the number of the temperature probes (645) corresponds to the number of the hanging plates (643), and a temperature probe (645) is fixedly connected below each hanging plate (643).

7. The device for preparing lithium manganese iron phosphate according to claim 6, characterized in that: The upper ends of the inner liner (220) and the insulation tube (230) are fixedly connected to the insulation dome (210). The top of the insulation dome (210) is provided with an axial hole (211) that passes through the inner and outer walls. The driving mechanism (1) includes a reducer (102) fixedly connected to the top surface of the insulation dome (210). The bottom surface of the reducer (102) is fixedly connected to the motor (103). The output end of the reducer (102) is fixedly connected to the main shaft (101). The main shaft (101) passes through the axial hole (211) and is fixedly connected to the linkage shaft (611). The feeding mechanism provided on the side wall of the insulation dome (210) includes a dry material feeding channel (212) and a feeding mechanism (3). The feeding mechanism (3) is suitable for injecting liquid reducing agent into the reaction chamber (2).

8. The device for preparing lithium manganese iron phosphate according to claim 7, wherein: The feeding mechanism (3) comprises a feeding tube (301) penetrating the side wall of the heat-insulating dome (210), the upper end of the feeding tube (301) is provided with a metering cylinder (302), the top of the metering cylinder (302) is fixedly connected to a mounting plate (304) via a support column (303), the mounting plate (304) is fixedly connected to an electric telescopic rod (305), the movable end of the electric telescopic rod (305) penetrates into the metering cylinder (302) and is fixedly connected to a piston (306), suitable for allowing the metering cylinder (302) to move. Negative pressure is generated in the measuring cylinder (302), or pressure is applied to the liquid reducing agent. The bottom of the measuring cylinder (302) is connected to a main pipeline (307) through a main electric control valve (311). The lower end of the main pipeline (307) branches into a plurality of branch pipes (308). The end of each branch pipe (308) is connected to a reducing agent storage tank (309). A branch electric control valve (310) is provided in each branch pipe (308). A feeding electric control valve (312) is provided in the injection pipe (301).

9. The device for preparing lithium manganese iron phosphate according to any one of claims 1 to 8, characterized in that: The discharge assembly (4) includes a blocking plug (410) and a locking pin (420), wherein the blocking plug (410) includes an embedded cone (411) adapted to be embedded in the discharge channel (243), and the side of the embedded cone (411) facing away from the discharge channel (243) includes an extension plate (412), and the extension plate (412) is provided with an inner pin hole (413) and a traction groove (414); the outer side surface of the base (240) includes a guide tube (244) surrounding the discharge channel (243), and the guide tube (244) is provided with an outer pin hole (245) penetrating the inner and outer walls; the locking pin (420) includes a pin plate (421) adapted to be simultaneously engaged with the outer pin hole (245) and the inner pin hole (413), and one end of the pin plate (421) is fixedly connected to a handle (422).

10. A method for preparing lithium manganese iron phosphate using the device according to claim 8, characterized in that The following steps are involved: S1. Initialize the device and use the discharge assembly (4) to block the discharge channel (243) so that all the electronically controlled valves are in a completely isolated state; S2. Weigh the powdered solid material and pour it into the reaction chamber (2) through the dry material input channel (212), then close the dry material input channel (212), and then start the heating mechanism (5) to preheat the solid material; S3. Adjust the main electric control valve (311) to the main pipeline (307) connection state; S4. The branch electric control valve (310) above the first reducing agent storage tank (309) is adjusted to a position where the branch pipe (308) is connected. The electric telescopic rod (305) is started to drive the piston (306) to generate negative pressure in the main pipe (307) and the branch pipe (308), thereby pumping the first reducing agent into the main pipe (307) and the branch pipe (308) according to the volume calculated by weighing. After the piston (306) moves a distance that meets the standard, the first branch electric control valve (310) is closed and the electric telescopic rod (305) is stopped. S5. The branch electric control valve (310) above the second reducing agent storage tank (309) is adjusted to a position connected to the branch pipe (308), and the electric telescopic rod (305) is started to drive the piston (306) to generate negative pressure in the main pipe (307) and the branch pipe (308), thereby pumping the second reducing agent into the main pipe (307) and the branch pipe (308) according to the volume calculated by weighing. After the piston (306) moves a distance that meets the standard, the second branch electric control valve (310) is closed, and the electric telescopic rod (305) is stopped; S6. Adjust the branch electric control valve (310) above the third reducing agent storage tank (309) to the position connected to the branch pipe (308), start the electric telescopic rod (305), drive the piston (306) to generate negative pressure in the main pipe (307) and the branch pipe (308), so that the third reducing agent is pumped into the main pipe (307) and the branch pipe (308) according to the volume calculated by weighing. After the piston (306) moves a distance that meets the standard, close the third branch electric control valve (310), and the electric telescopic rod (305) stops. At this time, all three reducing agents are located in the main pipe (307) and the branch pipe (308), and the liquid level is lower than the main electric control valve (311); S7. Adjust the main electric control valve (311) to a state where the metering cylinder (302) is connected to the outside atmosphere; S8. Start the electric telescopic rod (305) to press the piston (306) to discharge the air in the metering cylinder (302) until the piston (306) contacts the inner bottom surface of the metering cylinder (302), and then adjust the main electric control valve (311) back to the main pipeline (307) connection state; S9. The electric telescopic rod (305) is activated again to pull the piston (306) to the upper limit and then stop, so that a vacuum is formed in the metering cylinder (302). Then, the three branch electric control valves (310) are adjusted simultaneously to a state where the branch pipe (308) is connected to the outside atmosphere. The outside atmospheric pressure will push all the mixed reducing agent in the branch pipe (308) and the main pipe (307) into the metering cylinder (302); S10. Adjust the main electric control valve (311) to a completely blocked state, adjust the feed electric control valve (312) to a connected state with the injection pipe (301), start the electric telescopic rod (305) to press down the piston (306) to inject all the mixed reducing agent in the metering cylinder (302) into the reaction chamber (2); S11. Starting the driving mechanism (1) drives the mixing mechanism (6) to rotate forward, fully mixing the solid material with the liquid reducing agent, and performing a reduction reaction under a high temperature environment, ultimately obtaining a moist lithium manganese iron phosphate material; S12. Remove the discharge assembly (4), and allow the driving mechanism (1) to drive the mixing mechanism (6) to reverse, cutting the wet lithium manganese iron phosphate material outward, and finally discharge it through the discharge channel (243) and the guide tube (244).

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