Aging and grading device for ternary positive electrode material precursor production
By adopting a three-stage synergistic separation system and a chamber emptying priority mechanism, the problems of particle mixing and resource waste in the preparation of ternary material precursors have been solved, achieving efficient particle separation and resource recycling, and improving production efficiency and raw material utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-03-27
AI Technical Summary
Existing technologies lack a multi-stage synergistic separation mechanism in the preparation of ternary material precursors, resulting in the mixing of fine particles, coarse particles and target particles, easy clogging during the sieving process, low production efficiency, low raw material utilization, and insufficient resource recycling.
A three-stage collaborative system of targeted positioning, cyclone separation, and vibratory sieving is constructed by adopting a precise particle separation process. By adjusting the motor to drive the bevel gear pair and threaded rod, efficient purification and quality control of medium particles are achieved. A collaborative flow mechanism with priority given to emptying the next-level chamber is designed to establish a continuous flow of slurry from feed to finished product, and to build a resource closed loop from raw materials to production and then to waste recycling.
It achieves uniform particle size and high purity of medium-sized particles, increases production efficiency by 40%, and improves raw material utilization to 99.5%. It solves the problems of particle mixing and resource waste in traditional sorting, and realizes deep synergy between particle separation and purification and resource recycling.
Smart Images
Figure CN121732093A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of ternary positive electrode aging processing, and particularly relates to an aging grading device for ternary positive electrode material precursor production. BACKGROUND
[0002] In the process of ternary material precursor preparation and other processes involving particle processing and slurry aging, the existing technology has the following problems: in the particle separation link, there is a lack of systematic multi-stage cooperative separation mechanism, only single-dimensional rough separation can be achieved, the target particle enrichment area cannot be accurately located from the source, resulting in serious mixing of fine particles, coarse particles and target particles, and it is difficult to effectively eliminate interference; at the same time, the sieve structure design is single, and the sieve hole is easily blocked due to the accumulation of coarse particles during the sieving process, which needs to be frequently stopped for cleaning to restore work, not only interrupting the production process, but also difficult to guarantee the particle size uniformity and purity of the separated particles, thereby affecting the electrochemical performance of the subsequent material. In the slurry aging link, the traditional batch operation mode is generally used, and there is a lack of ordered linkage control logic for emptying the rear chamber and feeding the front chamber among the chambers, the state of feeding the front chamber and emptying the rear chamber is disconnected, and the chamber material is easily accumulated or the flow is interrupted, so that the continuous flow of slurry from feeding to finished product cannot be realized, and the production efficiency is at a low level for a long time. In terms of resource utilization, the fine particles and coarse particles generated in the separation process are directly disposed as waste, and an effective recycling mechanism is not established, which not only causes a large amount of raw material waste and increases production cost, but also cannot form a resource cycle from raw material to production to waste recycling, and the raw material utilization rate is far from the ideal standard, and the environmental and economic burden of waste treatment is also increased. SUMMARY
[0003] The present application provides an aging grading device for ternary positive electrode material precursor production, which effectively ages and grades the slurry.
[0004] To solve the above technical problems, the technical scheme of the present application is as follows: In a first aspect, an aging grading device for ternary positive electrode material precursor production, comprising: an aging tank and a feeding pipe arranged above the aging tank, a discharging pipe fixed below the aging tank, and further comprising: a separation table, three of which are arranged, and each of the three separation tables is fixed in the aging tank; a separation piece fixed in the separation table for separating undersized fine particles in the slurry; a sieve piece fixed in the separation table for retaining oversized coarse particles in the slurry; a return piece fixed in the separation table for returning the undersized fine particles to the previous process for regrowth and discharging the oversized coarse particles for dissolution for raw material recycling; a stirring piece fixed in the separation table; a heating plate fixed above the separation table; a pH sensor fixed above the separation table; and a temperature sensor fixed above the separation table. The separation pump is fixed in the separation table; the separation inlet pipe is fixed on the separation pump; the separation sleeve is slidably sleeved on the end of the separation inlet pipe away from the separation pump; the separation supply pipe is fixed on the separation pump; the separation supply channel is arranged in the separation table and is in communication with the end of the separation supply pipe away from the separation pump; the separation taper groove is arranged in the separation table and is in communication with the separation supply channel; the butt joint channel is arranged in the separation table and is in communication with the taper contraction end of the separation taper groove; the collection taper groove is arranged in the separation table and is in communication with the other end of the butt joint channel; and the overflow pipe is fixed on the inner top of the separation taper groove. The fixed ring is fixed below the separation table and at the bottom of the collection taper groove; the screen pipe is fixed above the fixed ring; and the elastic rubber ring is fixed on the screen pipe.
[0005] Further, the first aging cavity is arranged in the inner top of the aging tank, the second aging cavity is arranged in the inner bottom of the aging tank and is located directly below the first aging cavity, the third aging cavity is arranged in the inner bottom of the aging tank and is located directly below the second aging cavity, and the finished product cavity is arranged in the inner bottom of the aging tank and is located directly below the third aging cavity.
[0006] Further, the separation member further comprises: The adjusting hole is arranged in the separation table and is sleeved below the separation sleeve; the adjusting piston is vertically and slidably arranged in the adjusting hole and is fixed below the separation sleeve; the adjusting motor is fixed in the separation table; the threaded rod is rotationally arranged in the adjusting hole and is threadedly connected to the adjusting piston; the adjusting bevel gear pair is provided with an input end bevel gear fixed on the adjusting motor and an output end bevel gear fixed below the threaded rod; and the first electrically-controlled on-off valve is fixed on the separation inlet pipe.
[0007] Further, the screen member further comprises: The screen cavity is arranged in the separation supply channel; the screen shaft is rotationally arranged in the separation table, one end of the screen shaft extends into the screen cavity, and the other end of the screen shaft extends into the collection taper groove; the bracket is fixed in the screen cavity and is rotationally sleeved on the screen shaft; the impeller is provided with two, both of which are fixed on the screen shaft; and the eccentric block is fixed on the screen shaft and is located below the screen taper net.
[0008] Further, the screen member further comprises: The ring rubber strip is fixed on the collection taper groove and is fixedly connected to the end of the screen taper net away from the elastic rubber ring; the linkage cross rod is fixed at both ends of the screen taper net; and the opening and closing top rod is fixed above the linkage cross rod.
[0009] Further, the screen member further comprises: Flange, fixed above the sieve pipe; sealing ring, fixed in the sieve pipe; spring ring seat, fixed in the sieve pipe and located directly below the sealing ring; floating ball, located in the sieve pipe; floating spring, fixed above the floating ball and below the spring ring seat.
[0010] Further, the material recycling device comprises: Recycling ring cavity, opened in the separation table; overflow channel, one end connected with the overflow pipe and the other end connected with the recycling ring cavity; recycling pump, fixed in the separation table; liquid suction pipe, one end extended to the bottom of the recycling ring cavity and the other end fixed on the recycling pump; liquid return pipe, one end fixed on the recycling pump and the other end extended to the top of the separation table; second electrically operated on-off valve, fixed on the liquid return pipe and located in the separation table.
[0011] Further, the material recycling device further comprises: Material recycling ring box, fixed directly below the separation table; material recycling conveying pipe, one end fixed below the sieve pipe and the other end fixed on the material recycling ring box; material recycling transfer pipe, one end fixed on the material recycling ring box and the other end extended out of the aging tank; material recycling main pipe, fixed on the end of the material recycling transfer pipe extended out of the aging tank; material recycling auxiliary pipe, fixed on the aging tank and located below the first aging cavity, the second aging cavity and the third aging cavity; third electrically operated on-off valve, fixed on the material recycling auxiliary pipe.
[0012] Further, the material recycling device further comprises: Stirring motor, fixed in the separation table; stirring shaft, fixed on the stirring motor; stirring blades, two provided and both fixed on the stirring shaft.
[0013] Further, the aging tank is fixed with a first acidic liquid pipe above, a first alkaline liquid pipe above, a second acidic liquid pipe outside, a second alkaline liquid pipe outside and a supporting leg below.
[0014] The above-mentioned scheme of the present application at least has the following advantages: This invention constructs a three-stage synergistic system of targeted positioning, cyclone separation, and vibratory sieving through a precise particle separation process, achieving efficient purification and quality control of medium-sized particles: An adjusting motor drives the adjusting bevel gear pair and threaded rod, causing the adjusting piston to move along the adjusting hole, precisely positioning the separation sleeve to the medium-sized particle enrichment layer, reducing interference from fine and coarse particles at the slurry source; a separation pump delivers the slurry into the separation cone trough, where the slurry spirals to form a high-speed cyclone. Under centrifugal force, density is classified, with medium and coarse particles being thrown against the trough wall and entering the docking channel with the outer cyclone, while substandard fine particles gather towards the center of the trough and flow through the overflow pipe and overflow channel with the inner cyclone. The particles are stored in the recycling chamber to complete the pre-separation of fine particles. After medium and coarse particles enter the collection cone groove, the sieve shaft drives the eccentric block to strike the sieve cone, causing the sieve cone to vibrate at high frequency and micro-amplitude to prevent coarse particles from clogging the holes. At the same time, the inner crossbar and the opening and closing top rod move up and down, forming an integrated action from sieving to impurity removal: the sieve cone traps the coarse particles that exceed the standard, and the coarse particles slide along the inclined surface of the screen to the top of the sieve tube. The opening and closing top rod presses down to push the floating ball to discharge the coarse particles. Through the progressive sorting of three pre-separation of fine particles and precise discharge of coarse particles, the medium particles entering the next stage of aging chamber have a uniform particle size and high purity, solving the problem of particle mixing in traditional sorting.
[0015] This invention utilizes a first, second, and third aging chamber as its core components and designs a collaborative flow mechanism that prioritizes the emptying of the next-level chamber, completely breaking through the efficiency bottleneck of traditional intermittent batch operations. Through the linkage control of a hidden liquid level detection module within the chambers and the conveying valve, an orderly cycle of emptying the rear chamber and replenishing the front chamber is established. The second aging chamber only starts conveying material after the slurry in the third aging chamber is completely emptied; and the first aging chamber follows suit after the second aging chamber is emptied, achieving continuous flow of slurry from feed to finished product, increasing production efficiency by over 40%. Through a progressive sorting process involving three stages of fine particle pre-separation and precise discharge of coarse particles, a closed-loop resource system is further constructed, from raw materials to production and then to waste recycling: fine particles are temporarily stored in the recycling ring cavity through the overflow pipe and then sent back to the original aging chamber by the recycling pump for reuse as seed crystals; coarse particles are collected in the recycling ring box through the recycling conveying pipe and discharged through the recycling main pipe and the third electric switch valve before being sent to the acid dissolution process for reuse; this design solves the pain point of raw material waste in traditional processes, increases the raw material utilization rate to over 99.5%, and achieves deep synergy between particle separation and purification and resource recycling. Attached Figure Description
[0016] Figure 1 A cross-sectional view of an aging tank in an aging and grading device for the production of ternary cathode material precursors provided in an embodiment of the present invention; Figure 2 An aging and grading device for the production of ternary cathode material precursors provided in this embodiment of the invention. Figure 1 Enlarged view of point A; Figure 3An aging and grading device for the production of ternary cathode material precursors provided in this embodiment of the invention. Figure 1 Enlarged view of point B; Figure 4 An aging and grading device for the production of ternary cathode material precursors provided in this embodiment of the invention. Figure 1 Enlarged view of point C; Figure 5 An aging and grading device for the production of ternary cathode material precursors provided in this embodiment of the invention. Figure 1 Enlarged view of point D; Figure 6 A front view of an aging tank for an aging and grading device used in the production of ternary cathode material precursors, provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the overall structure of an aging and grading device for the production of ternary cathode material precursors provided in an embodiment of the present invention; Figure 8 A cross-sectional view of the separation stage of an aging and grading apparatus for the production of ternary cathode material precursors provided in an embodiment of the present invention; Figure 9 An aging and grading device for the production of ternary cathode material precursors provided in this embodiment of the invention. Figure 8 Enlarged view of point E.
[0017] Explanation of reference numerals in the attached figures: In the diagram: 1. Aging tank; 101. First aging chamber; 102. Second aging chamber; 103. Third aging chamber; 104. Finished product chamber; 105. First acidic liquid pipe; 106. First alkaline liquid pipe; 107. Second acidic liquid pipe; 108. Second alkaline liquid pipe; 109. Support leg; 2. Feed pipe; 3. Discharge pipe; 4. Separation platform; 5. Separation component; 501. Separation pump; 502. Separation inlet pipe; 503. Separation sleeve; 5 04. Separating supply pipe; 505. Separating supply channel; 506. Separating conical groove; 507. Connecting channel; 508. Collecting conical groove; 509. Overflow pipe; 5010. Adjusting hole; 5011. Adjusting piston; 5012. Adjusting motor; 5013. Threaded rod; 5014. Adjusting bevel gear pair; 5015. First electric switching valve; 6. Screening component; 601. Fixing ring; 602. Screening pipe; 603. Elastic rubber ring; 60 4. Screening cone; 605. Screening chamber; 606. Screening shaft; 607. Support; 608. Impeller; 609. Eccentric block; 6010. Rubber ring strip; 6011. Linkage crossbar; 6012. Opening and closing top rod; 6013. Flange; 6014. Sealing ring; 6015. Spring ring seat; 6016. Floating ball; 6017. Floating spring; 7. Return component; 701. Recovery ring cavity; 702. Overflow channel; 703. Return 704. Pump; 705. Liquid extraction pipe; 706. Return pipe; 707. Second electric switch valve; 708. Return material ring box; 709. Return material conveying pipe; 7010. Return material main pipe; 7011. Return material auxiliary pipe; 7012. Third electric switch valve; 8. Agitator; 801. Agitator motor; 802. Agitator shaft; 803. Agitator blades; 9. Heating plate; 10. pH sensor; 11. Temperature sensor. Detailed Implementation
[0018] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0019] like Figures 1 to 9As shown, an embodiment of the present invention provides an aging and grading device for the production of ternary cathode material precursors, comprising: an aging tank 1 and a feed pipe 2 disposed above the aging tank 1, and a discharge pipe 3 fixed below the aging tank 1; further comprising: three separation platforms 4, all three of which are fixed inside the aging tank 1; a separation element 5, fixed inside the separation platform 4, used to separate substandard fine particles in the slurry; a sieve element 6, fixed inside the separation platform 4, used to intercept excessive coarse particles in the slurry; a return element 7, fixed inside the separation platform 4, used to return substandard fine particles to the previous process for regrowth and discharge excessive coarse particles for dissolution and reuse as raw materials; a stirring element 8, fixed inside the separation platform 4; a heating plate 9, fixed above the separation platform 4; a pH sensor 10, fixed above the separation platform 4; and a temperature sensor 11, fixed above the separation platform 4.
[0020] Separator pump 501 is fixed inside separator platform 4; separator inlet pipe 502 is fixed to separator pump 501; separator sleeve 503 is slidably sleeved on the end of separator inlet pipe 502 away from separator pump 501; separator supply pipe 504 is fixed to separator pump 501; separator supply channel 505 is opened inside separator platform 4 and connected to the end of separator supply pipe 504 away from separator pump 501; separator conical groove 506 is opened inside separator platform 4 and connected to separator supply channel 505; docking channel 507 is opened on separator platform 4. Inside, one end is connected to the conical conical end of the separating conical groove 506; the collecting conical groove 508 is opened inside the separating platform 4, and its conical conical end is connected to the other end of the docking channel 507; the overflow pipe 509 is fixed to the inner top of the separating conical groove 506; the fixing ring 601 is fixed below the separating platform 4 and located at the bottom of the collecting conical groove 508; the sieve pipe 602 is fixed inside the fixing ring 601 at the top; the elastic rubber ring 603 is fixed above the sieve pipe 602; the sieve conical mesh 604 has its constricted end fixed on the elastic rubber ring 603.
[0021] The aging tank 1 has a first aging chamber 101 at the top and a second aging chamber 102 inside, located directly below the first aging chamber 101. A third aging chamber 103 is also located inside the aging tank 1, directly below the second aging chamber 102. A finished product chamber 104 is located at the bottom of the aging tank 1, directly below the third aging chamber 103. A first acidic liquid pipe 105 and a first alkaline liquid pipe 106 are fixed above the aging tank 1. A second acidic liquid pipe 107 and a second alkaline liquid pipe 108 are fixed to the outside of the aging tank 1. A support leg 109 is fixed to the bottom of the aging tank 1.
[0022] The stirring component 8 includes: a stirring motor 801, fixed inside the separation platform 4; a stirring shaft 802, fixed on the stirring motor 801; and two stirring blades 803, both of which are fixed on the stirring shaft 802.
[0023] Specifically, the separation supply channel 505 is connected to the top edge of the separation cone 506 at a tangential angle; the first acidic liquid pipe 105 and the first alkaline liquid pipe 106 are used to adjust the pH value of the first aging chamber 101; two second acidic liquid pipes 107 and two second alkaline liquid pipes 108 are each provided to detect the pH value in the second aging chamber 102 and the third aging chamber 103, respectively.
[0024] In another preferred embodiment of the present invention, the separating member 5 further includes: an adjusting hole 5010, which is opened in the separating platform 4 and sleeved below the separating sleeve 503; an adjusting piston 5011, which is vertically slidably disposed in the adjusting hole 5010 and fixed below the separating sleeve 503; an adjusting motor 5012, which is fixed in the separating platform 4; a threaded rod 5013, which is rotatably disposed in the adjusting hole 5010 and threadedly inserted into the adjusting piston 5011; an adjusting bevel gear pair 5014, with the input bevel gear fixed on the adjusting motor 5012 and the output bevel gear fixed below the threaded rod 5013; and a first electric switching valve 5015, which is fixed on the separating inlet pipe 502.
[0025] Specifically, the rotation of the threaded rod 5013 is used to adjust the height of the separation sleeve 503, thereby driving the separation sleeve 503 to be precisely positioned in the medium particle enrichment layer, reducing interference from fine and coarse particles from the slurry source.
[0026] In another preferred embodiment of the present invention, the sieving component 6 further includes: a sieving chamber 605, which is opened on the separation supply channel 505; a sieving shaft 606, which is rotatably disposed in the separation platform 4, with one end extending into the sieving chamber 605 and the other end extending into the collection cone groove 508; a bracket 607, which is fixed in the sieving chamber 605 and rotatably sleeved on the sieving shaft 606; two impellers 608, both of which are fixed on the sieving shaft 606; and an eccentric block 609, which is fixed on the sieving shaft 606 and located below the sieving cone mesh 604.
[0027] The screening component 6 also includes: a ring rubber strip 6010, which is fixed on the collecting cone groove 508 and fixedly inserted into the end of the screening cone 604 away from the elastic rubber ring 603; a linkage crossbar 6011, which is fixed at both ends on the screening cone 604; and an opening and closing top rod 6012, which is fixed at the top on the linkage crossbar 6011.
[0028] The screening component 6 also includes: a flange 6013, fixed above the screening tube 602; a sealing ring 6014, fixed inside the screening tube 602; a spring ring seat 6015, fixed inside the screening tube 602 and located directly below the sealing ring 6014; a floating ball 6016, located inside the screening tube 602; and a floating spring 6017, fixed above the floating ball 6016 and below the spring ring seat 6015.
[0029] Specifically, the ring rubber strip 6010 and the elastic rubber ring 603 are connected together to the screening cone 604, which can ensure the effective vibration of the screening cone 604.
[0030] In another preferred embodiment of the present invention, the return component 7 includes: a recovery annular cavity 701, which is formed in the separation platform 4; an overflow channel 702, one end of which is connected to the overflow pipe 509 and the other end of which is connected to the top of the recovery annular cavity 701; a recovery pump 703, which is fixed in the separation platform 4; a liquid extraction pipe 704, one end of which extends to the bottom of the recovery annular cavity 701 and the other end of which is fixed to the recovery pump 703; a return pipe 705, one end of which is fixed to the recovery pump 703 and the other end of which extends to the top of the separation platform 4; and a second electric switch valve 706, which is fixed to the return pipe 705 and located in the separation platform 4.
[0031] The return material component 7 also includes: a return material ring box 707, fixed directly below the separation table 4; a return material conveying pipe 708, one end fixed below the screening pipe 602 and the other end fixed on the return material ring box 707; a return material transfer pipe 709, one end fixed on the return material ring box 707 and the other end extending out of the aging tank 1; a return material main pipe 7010, fixed on the end of the return material transfer pipe 709 extending out of the aging tank 1; a return material auxiliary pipe 7011, fixed on the aging tank 1 and located below the first aging chamber 101, the second aging chamber 102 and the third aging chamber 103; and a third electric switch valve 7012, fixed on the return material auxiliary pipe 7011.
[0032] The working principle, applied to the continuous aging and precise grading of precursor slurry, is as follows: Unaged raw slurry is fed into the first aging chamber 101 inside the aging tank 1 through the feed pipe 2. To ensure that the slurry in the first aging chamber 101 meets the environmental requirements for uniform crystal growth, the first acidic liquid pipe 105 and the first alkaline liquid pipe 106 dynamically adjust the pH value of the slurry in the chamber based on the real-time monitoring data of the pH sensor 10. The monitoring frequency can be adjusted according to different precursor systems, usually once per minute. The pH value is usually maintained in the range of 10.0-11.0. At the same time, the heating plate 9 above the separation stage 4 corresponding to the first aging chamber 101 will cooperate with the feedback signal of the temperature sensor 11 to control the temperature. The temperature control accuracy needs to be ±1℃ to stabilize the temperature inside the chamber at the target growth temperature, such as 50-60℃. After starting the stirring motor 801, the output shaft of the stirring motor 801 drives the stirring shaft 802 to rotate synchronously. The stirring shaft 802 further drives the two arc-shaped stirring blades 803 to rotate at a low speed, which can be set to 50-100 rpm. This avoids damaging the crystals and not only ensures that the slurry inside the chamber is fully mixed, but also allows the fine, medium and coarse particles in the slurry to form a stable dynamic concentration gradient. The coarse particles gather at the bottom of the aging chamber due to gravity, while the fine particles are suspended in the upper part of the chamber by the convection of the slurry. The target medium particles are concentrated in the middle area of the chamber, providing the basic conditions for subsequent accurate classification. The target medium particles are 5-8μm and can be adjusted according to product requirements.
[0033] The slurry transfer in this device follows a priority logic of emptying the next-level chamber: only after the slurry in the third aging chamber 103 has been completely processed and emptied can the slurry in the second aging chamber 102 be transferred to the third aging chamber 103; only after the second aging chamber 102 has been emptied can the slurry in the first aging chamber 101 be transferred to the second aging chamber 102, and particle classification is completed simultaneously during the transfer process; before classification, the particle enrichment layer must be precisely located using the adjustment component: the adjustment motor 5012 is started, and the output of the adjustment motor 5012 drives the adjustment bevel gear... The rotation of 5014 causes the adjusting bevel gear to rotate, which in turn drives the rotation of the threaded rod 5013. The rotational motion of the threaded rod 5013 is converted into the vertical linear motion of the adjusting piston 5011 along the adjusting hole 5010. The adjusting piston 5011 is fixedly connected to the separating sleeve 503, which in turn drives the separating sleeve 503 to rotate up or down along the separating inlet pipe 502. This causes the top end of the separating sleeve 503 to extend beyond the coarse particle aggregation layer at the bottom of the aging chamber and precisely align with the medium particle enrichment layer, ensuring that the extracted slurry is mainly composed of medium particles.
[0034] The separation pump 501 and the first electric switch valve 5015 are started. The medium-particle slurry in the aging chamber is extracted through the separation sleeve 503 and the separation inlet pipe 502, and then transported to the separation cone 506 through the separation supply pipe 504 and the separation supply channel 505. After the slurry enters the separation cone 506 tangentially, it spirals downward along the tank wall and forms a high-speed vortex. Under the action of centrifugal force, the denser medium and coarse particles are thrown towards the tank wall and enter the docking channel 507 with the outer vortex; while the less dense, substandard fine particles move into the separation cone 506. The fine particles accumulate in the central area of 506 and overflow with the internal swirling flow. They flow into the recovery ring cavity 701 for temporary storage through the overflow pipe 509 and overflow channel 702 at the top of the separation cone 506. When the fine particles in the recovery ring cavity 701 reach the set liquid level, the recovery pump 703 and the second electric switch valve 706 are turned on. The recovery pump 703 extracts the fine particles in the recovery ring cavity 701 through the liquid extraction pipe 704 and sends them back to the original aging cavity through the liquid return pipe 705, so that the fine particles can participate in crystal growth again as crystal seeds, realizing the efficient recycling of raw materials.
[0035] Medium and coarse particles flowing out through the docking channel 507 further enter the collecting cone trough 508, and then flow into the screening cone 604. During this process, the slurry in the screening chamber 605 of the separation supply channel 505 will naturally impact the impeller 608 in the screening chamber 605 to rotate. The impeller 608 drives the screening shaft 606 to rotate synchronously. The rotation of the screening shaft 606 drives the rotation of the eccentric block 609, which will continuously strike the screening cone 604. With the elastic deformation of the elastic rubber ring 603 at the upper end and the ring rubber strip 6010 at the lower end of the screening cone 604, the screening cone 604 will generate high-frequency micro-amplitude vibration. The vibration frequency can be adjusted by the number of blades of the impeller 608, usually 200-300Hz, which effectively avoids coarse particles clogging the screen holes. The vibration of the screening cone 604 simultaneously drives the inner linkage crossbar 6011 and the opening / closing top rod 6012 to move up and down. The screening cone 604 traps excessive coarse particles, which slide down the inclined surface of the screening cone 604 and converge above the screening tube 602 after passing through the flange 6013 at the upper end of the screening tube 602. When the opening / closing top rod 6012 moves downward, it presses down the floating ball 6016 inside the screening tube 602, causing the floating ball 6016 to compress the floating spring 6017. The floating ball 6016 disengages from the sealing ring 6014, and the coarse particles smoothly enter the screening tube 602. When the opening / closing top rod 6012 moves upward, the floating spring 6017 resets and pushes the floating ball 6016 to reseal the sealing ring 6014.
[0036] Coarse particles entering the screening pipe 602 are temporarily stored in the return ring box 707 via the return conveying pipe 708, and then collected into the return main pipe 7010 via the return transfer pipe 709. After the third electric switch valve 7012 is activated, the coarse particles are discharged from the aging tank 1 through the return auxiliary pipe 7011 and sent to the acid dissolution process to be processed into a metal salt solution for reuse as raw material. The second aging chamber 102 and the third aging chamber 103 both adopt the same process logic as the first aging chamber 101. The pH value adjustment of the second aging chamber 102 is achieved by using a pH sensor 10 in conjunction with one branch of the second acidic liquid pipe 107 and one branch of the second alkaline liquid pipe 108. The third aging chamber 103 is adjusted by using a pH sensor 10. Another branch of the acidic liquid pipe 107 works in conjunction with another branch of the second alkaline liquid pipe 108 to achieve pH value sensor 10; each aging chamber uses a closed-loop process of fine particles returning to the original chamber for growth, coarse particles being discharged, dissolved, and reused, and medium particles being retained and transferred to the next stage, so that medium particles grow continuously and uniformly during the three-stage aging process. Finally, the qualified medium particle slurry after being processed in the third aging chamber 103 is transferred to the finished product chamber 104, and then discharged from the discharge pipe 3 below the finished product chamber 104 and transported to the next process. The purity of medium particles in the final finished product can reach more than 95%, and the particle size distribution PSDSpan value is less than 0.3, which solves the technical problems of wide particle size distribution and poor product consistency in traditional batch aging processes.
[0037] This invention uses the first aging chamber 101, the second aging chamber 102, and the third aging chamber 103 as core carriers, and designs a collaborative flow mechanism that prioritizes the emptying of the next-level chamber, completely breaking the efficiency bottleneck of traditional intermittent batch operation: through the linkage control of the chamber hidden liquid level detection module and the conveying valve, an orderly cycle of emptying the rear chamber and replenishing the front chamber is established; when the slurry in the third aging chamber 103 is completely emptied, the second aging chamber 102 starts conveying; after the second aging chamber 102 is emptied, the first aging chamber 101 follows up with conveying, realizing the continuous flow of slurry from feeding to finished product, improving production efficiency by more than 40%; Through a progressive sorting process involving three stages of fine particle pre-separation and precise discharge of coarse particles, a closed-loop resource system is further constructed, from raw materials to production and then to waste recycling: fine particles are temporarily stored in the recycling ring chamber 701 via the overflow pipe 509, and then sent back to the original aging chamber as seed crystals for reuse by the recycling pump 703; coarse particles are collected in the recycling ring box 707 via the recycling conveying pipe 708, and then discharged through the recycling main pipe 7010 and the third electric switch valve 7012 before being sent to the acid dissolution process for reuse; this design solves the pain point of raw material waste in traditional processes, increases the raw material utilization rate to over 99.5%, and achieves deep synergy between particle separation and purification and resource recycling.
[0038] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. An aging and grading device for the production of ternary cathode material precursors, comprising: An aging tank and a feed pipe disposed above the aging tank, wherein a discharge pipe is fixed below the aging tank, characterized in that it further includes: The system includes three separation platforms, all fixed inside the aging tank; a separation component, fixed inside the separation platform, for separating substandard fine particles from the slurry; a screening component, fixed inside the separation platform, for retaining excessive coarse particles from the slurry; a return component, fixed inside the separation platform, for returning substandard fine particles to the previous process for regrowth and discharging excessive coarse particles for reuse; a stirring component, fixed inside the separation platform; a heating plate, fixed above the separation platform; a pH sensor, fixed above the separation platform; and a temperature sensor, fixed above the separation platform. A separator pump is fixed inside the separator platform; a separator inlet pipe is fixed to the separator pump; a separator sleeve is slidably fitted onto the end of the separator inlet pipe furthest from the separator pump; a separator supply pipe is fixed to the separator pump; a separator supply channel is located inside the separator platform and connected to the end of the separator supply pipe furthest from the separator pump; a separator conical groove is located inside the separator platform and connected to the separator supply channel; a docking channel is located inside the separator platform, with one end connected to the conical contraction end of the separator conical groove; a collecting conical groove is located inside the separator platform, with the conical contraction end connected to the other end of the docking channel; and an overflow pipe is fixed to the inner top of the separator conical groove. A fixing ring is fixed below the separation platform and located at the bottom of the collecting cone groove; a sieve tube is fixed inside the fixing ring at the top; an elastic rubber ring is fixed above the sieve tube; and the sieve cone mesh has its constricted end fixed to the elastic rubber ring.
2. The aging and grading device for the production of ternary cathode material precursors according to claim 1, characterized in that, The aging tank has a first aging chamber at the top, a second aging chamber inside the aging tank, and the second aging chamber is located directly below the first aging chamber; the aging tank also has a third aging chamber inside the aging tank, and the third aging chamber is located directly below the second aging chamber; the aging tank also has a finished product chamber at the bottom, and the finished product chamber is located directly below the third aging chamber.
3. The aging and grading device for the production of ternary cathode material precursors according to claim 1, characterized in that, The separator also includes: An adjustment hole is located inside the separation platform and fitted below the separation sleeve; an adjustment piston is vertically slidably disposed inside the adjustment hole and fixed below the separation sleeve; an adjustment motor is fixed inside the separation platform; a threaded rod is rotatably disposed inside the adjustment hole and threadedly inserted into the adjustment piston; an adjustment bevel gear pair, with the input bevel gear fixed to the adjustment motor and the output bevel gear fixed below the threaded rod; and a first electric switch valve is fixed to the separation inlet pipe.
4. The aging and grading device for the production of ternary cathode material precursors according to claim 1, characterized in that, The screening component further includes: The sieving chamber is located on the separation supply channel; the sieving shaft is rotatably mounted inside the separation platform, with one end extending into the sieving chamber and the other end extending into the collection cone groove; the bracket is fixed inside the sieving chamber and rotatably sleeved on the sieving shaft; there are two impellers, both of which are fixed on the sieving shaft; and the eccentric block is fixed on the sieving shaft and located below the sieving cone.
5. The aging and grading device for the production of ternary cathode material precursors according to claim 4, characterized in that, The screening component further includes: The ring rubber strip is fixed on the collecting cone groove and is fixedly inserted into the end of the screening cone screen away from the elastic rubber ring; the linkage crossbar is fixed at both ends to the screening cone screen; the opening and closing top rod is fixed on the linkage crossbar at the top.
6. The aging and grading device for the production of ternary cathode material precursors according to claim 5, characterized in that, The screening component further includes: The flange is fixed above the screening tube; the sealing ring is fixed inside the screening tube; the spring ring seat is fixed inside the screening tube and located directly below the sealing ring; the floating ball is located inside the screening tube; and the floating spring is fixed above the floating ball and below the spring ring seat.
7. The aging and grading device for the production of ternary cathode material precursors according to claim 1, characterized in that, The recycled components include: The recovery ring chamber is located inside the separation stage; the overflow channel is connected at one end to the overflow pipe and at the other end to the top of the recovery ring chamber; the recovery pump is fixed inside the separation stage; the suction pipe extends at one end to the bottom of the recovery ring chamber and at the other end to the recovery pump; the return pipe is fixed at one end to the recovery pump and at the other end to the top of the separation stage; the second electric switch valve is fixed on the return pipe and located inside the separation stage.
8. The aging and grading device for the production of ternary cathode material precursors according to claim 7, characterized in that, The recycled component also includes: The return material ring box is fixed directly below the separation table; the return material conveying pipe is fixed at one end below the screening pipe and at the other end on the return material ring box; the return material transfer pipe is fixed at one end on the return material ring box and extends out of the aging tank at the other end; the return material main pipe is fixed at the end of the return material transfer pipe that extends out of the aging tank; the return material auxiliary pipe is fixed on the aging tank and located below the first aging chamber, the second aging chamber and the third aging chamber; the third electric switch valve is fixed on the return material auxiliary pipe.
9. The aging and grading device for the production of ternary cathode material precursors according to claim 1, characterized in that, The stirring component includes: The stirring motor is fixed inside the separation platform; the stirring shaft is fixed on the stirring motor; there are two stirring blades, both of which are fixed on the stirring shaft.
10. The aging and grading device for the production of ternary cathode material precursors according to claim 2, characterized in that, A first acidic liquid pipe is fixed above the aging tank, a first alkaline liquid pipe is fixed above the aging tank, a second acidic liquid pipe is fixed to the outside of the aging tank, a second alkaline liquid pipe is fixed to the outside of the aging tank, and a support leg is fixed below the aging tank.