DE112022001554T5 - STIRRING MECHANISM FOR EXTRACTING LITHIUM FROM THE WASTE LIQUID OF A LITHIUM IRON PHOSPHATE BATTERY - Google Patents

Abstract

Disclosed is a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, comprising a base, a jaw, and a stirring mechanism; the stirring mechanism comprises a first motor, a rotary member, and a stirring member; the rotary member comprises a second motor, a connecting end, and a rotary shaft; the rotary shaft comprises an inner shaft and an outer shaft; the stirring member comprises a claw-shaped connecting base, a separating frame, a material guide wheel, and a collecting frame; the claw-shaped connecting base is connected to an outer lower end of the outer shaft; the separating frame is connected to a lower end of the claw-shaped connecting base; the collecting frame is connected to a lower portion of the separating frame; and the material guide wheel is fixed to a lower end of an inner cavity of the collecting frame and is connected to a lower end of the inner shaft. According to the stirring mechanism, using the obliquely arranged rotating member, the rotating member and the stirring member form a certain angle with the central axis of a container during rotation to expand the rotating and stirring range of the stirring member and accelerate the fusion between the lithium iron phosphate battery waste liquid and a chemical preparation, so that other metal elements in the lithium iron phosphate battery waste liquid are rapidly precipitated and separated.

Description

FIELD OF TECHNOLOGY

The present invention relates to the technical field of recycling waste batteries and, more particularly, to a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery.

BACKGROUND

Lithium iron phosphate battery is a lithium-ion battery with lithium iron phosphate as the cathode material and carbon as the anode material. Due to its advantages such as high working voltage, high energy density, long cycle life, good safety, low self-discharge and no memory effect, lithium iron phosphate battery is widely used in the new energy vehicle industry. With the rise of electrification in the automobile industry, people have begun to pay attention to the recycling of lithium iron phosphate batteries for vehicles in the future.

The recycling of lithium iron phosphate battery is mainly divided into two stages, in the first stage, a lithium iron phosphate battery is crushed into lithium iron phosphate powder; in the second stage, the lithium iron phosphate powder is recycled into a lithium salt product such as lithium carbonate by a physical or chemical process. A lithium element in the waste liquid of the existing lithium iron phosphate battery is mostly recycled by a chemical process - wet extraction, which means that the waste liquid of the lithium iron phosphate battery is mixed with other chemical solutions to react, other metal elements (such as iron, aluminum and manganese) in the waste liquid of the lithium iron phosphate battery are agglomerated and precipitated by continuously stirring the mixed solution; and finally, a precipitate is filtered and separated to obtain a lithium carbonate solution. However, in most existing equipment, the mixed solution of lithium iron phosphate battery waste liquid and other chemical solutions needs to be manually stirred, then other metal elements are made to agglomerate and precipitate, and filtered layer by layer to obtain the lithium carbonate solution. The whole process is complicated and the extraction takes a long time, so the demand for convenient extraction of lithium from lithium iron phosphate battery waste liquid cannot be met.

SUMMARY

The object of the present application is to provide a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery in order to solve the above-mentioned problems.

In order to achieve the above-mentioned object, the technical solutions of the present invention are as follows: a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery includes a base, a jaw, and a stirring mechanism; the jaw is movably connected to both ends of the base; the base is provided with a support frame at a lower portion, and the stirring mechanism is rotatably arranged in a center of the support frame and extends to a lower portion of the support frame; the stirring mechanism includes a first motor, a rotary member, and a stirring member; the first motor is fixed in a center of the base; the rotary member is inserted in the center of the support frame, and the rotary member includes a second motor, a connecting end, and a rotating shaft; the connecting end has an "L"-shaped structure, an included angle between two end portions of the connecting end is obtuse, and one end of the connecting end is connected to an output end of the first motor; the second motor is fixed to an upper portion of the other end of the connecting end; the rotating shaft includes an inner shaft and an outer shaft; the outer shaft is connected to a lower portion of the connecting end below the second motor, and the inner shaft is rotatably disposed in an inner cavity of the outer shaft and connected to an output end of the second motor; the stirring member includes a jaw-shaped connecting base, a separating frame, a material guide wheel, and a collecting frame; the claw-shaped connecting base is connected to an outer lower end of the outer shaft; the separating frame is connected to a lower end of the claw-shaped connecting base; the collecting frame is detachably connected to a lower portion of the separating frame; and the material guide wheel is fixed to a lower end of an inner cavity of the collecting frame and connected to a lower end of the inner shaft.

In addition, the number of the clamping jaws is not less than three, and the clamping jaw comprises a connecting plate and a fixing plate; the connecting plate is movably connected to the fixing plate, and one end of the connecting plate remote from the fixing plate is suspended from the base; and a connecting A connection between the connecting plate and the fixing plate and a connection between the connecting plate and the base are both provided with a locking button for locking the angle.

In addition, the mounting plate is provided with an anti-slip protection on one side near the frame.

In addition, a middle portion of the rotary shaft is provided with a support end; and the center of the support frame is provided with at least three limiting plates for limiting the vibration amplitudes of a fixed end, the rotary shaft and the support end.

Further, the separating frame is provided with a downwardly lowered funnel-shaped extension portion at an upper end, and a gap is formed between the extension portion and the outer shaft; a material guide plate is provided on an outer side of the outer shaft in an inner cavity of the separating frame, and a spiral recess is provided on an outer side wall of the outer shaft at the extension portion above the material guide plate.

Furthermore, the collecting frame includes an inner cylinder, a filter plate and an outer frame; the inner cylinder is located above an inner cavity of the outer frame and is arranged coaxially with the outer frame; the filter plate is arranged in a middle portion of the inner cavity of the outer frame and connected to a lower end of the inner cylinder to divide the outer frame into an upper opening cavity and a lower open cavity; and the upper opening cavity of the outer frame extends below the material guide plate in the separation frame.

Further, the material guide wheel is arranged in the lower opening cavity of the outer frame, and the material guide wheel includes a connecting frame, blades and a baffle plate which are arranged one behind the other; the connecting frame is annular with a channel in the center; the hook-shaped blades are arranged circumferentially between the connecting frame and the baffle plate, and a thickness of an end of the blade near a central point of the connecting frame and the baffle plate is smaller than that of an end of the blade near an outer periphery of the connecting frame and the baffle plate; and a lower end of the inner shaft passes through the channel of the connecting frame and is connected to the baffle plate.

1. (1) Gemäß der vorliegenden Erfindung bilden das Drehelement und das Rührelement unter Verwendung des schräg angeordneten Drehelements einen bestimmten Winkel mit der Mittelachse des Behälters, während sie sich mit dem Motor drehen, um den Dreh- und Rührbereich des Rührelements zu erweitern und die Fusion zwischen den gemischten Lösungen zu beschleunigen, so dass andere Metallelemente in der Abfallflüssigkeit der Lithium-Eisenphosphat-Batterie schnell ausgefällt und getrennt werden;
2. (2) gemäß der vorliegenden Erfindung werden die backenförmige Verbindungsbasis, der Trennrahmen, das Materialführungsrad und der Sammelrahmen angenommen, um das Rührelement zu bilden, die Verbindungsbasis, der Trennrahmen und der Sammelrahmen drehen sich zusammen mit der äußeren Welle der Drehwelle, und das Materialführungsrad dreht sich zusammen mit der Zwischenwelle der Drehwelle, so dass das Materialführungsrad mit schnellerer Drehgeschwindigkeit eine Saugkraft am unteren Ende des inneren Hohlraums des Sammelrahmens bilden kann, so dass die gemischte Lösung schnell in den inneren Hohlraum des Trennrahmens durch den Spalt zwischen der backenförmigen Verbindungsbasis und dem Trennrahmen eintritt, so dass andere Metallelemente, die in der Abfallflüssigkeit der Lithium-Eisenphosphat-Batterie ausgefällt und agglomeriert sind, in dem inneren Hohlraum des Sammelrahmens unter der Wirkung der fließenden Lösung abgelagert werden können, wodurch das Ziel der Trennung anderer Metallelemente in der Abfallflüssigkeit der Lithium-Eisenphosphat-Batterie erreicht wird und komplizierte Vorgänge und Ausfällungsfiltervorgänge, die durch manuelles Rühren verursacht werden, reduziert werden;
3. (3) gemäß der vorliegenden Erfindung können der speziell geformte Verlängerungsabschnitt und die spiralförmige Aussparung, die auf der äußeren Welle angeordnet sind, eine Strömungsrate der gemischten Lösung in dem Spalt zwischen dem Verlängerungsabschnitt und der äußeren Welle beschleunigen und die gemischte Lösung dazu bringen, schnell in den inneren Hohlraum des Trennrahmens einzutreten, um das ausgefällte Metall zu trennen und zu filtern;
4. (4) Gemäß der vorliegenden Erfindung kann durch Anordnen der Materialführungsplatte zwischen dem Verlängerungsabschnitt und dem oberen Öffnungshohlraum des äußeren Rahmens ein Strömungsweg der gemischten Lösung in dem Trennrahmen durch die Materialführungsplatte verlängert werden, wodurch sichergestellt wird, dass die gemischte Lösung eine gewisse Zeit hat, damit andere Metallelemente ausfallen und agglomerieren können; und
5. (5) Gemäß der vorliegenden Erfindung kann durch die Anordnung der verstellbaren Klemmbacke, die am unteren Teil des Sockels angeordnet ist, ein eingeschlossener Winkel zwischen der Verbindungsplatte der Klemmbacke und dem Sockel und ein eingeschlossener Winkel zwischen der Verbindungsplatte und der Befestigungsplatte entsprechend einer Größe der Flaschenöffnung des Lithiumextraktionsbehälters adaptiv eingestellt werden, und nach der Einstellung der Winkel durch den Verriegelungsknopf verriegelt wird, so dass der Abstand zwischen den Klemmbacken adaptiv entsprechend der Größe der Flaschenöffnung des Lithiumextraktionsbehälters eingestellt werden kann, wodurch sichergestellt wird, dass die eingestellten Klemmbacken ein stabiles Klemmen mit der Flaschenöffnung des Lithiumextraktionsbehälters realisieren können, wodurch die stabile Verwendung des Drehelements und des Rührelements sichergestellt wird.

Compared with the prior art, the present invention has the following advantageous effects:

1. (1) According to the present invention, using the obliquely arranged rotating member, the rotating member and the stirring member form a certain angle with the central axis of the container while rotating with the motor to expand the rotating and stirring range of the stirring member and accelerate the fusion between the mixed solutions, so that other metal elements in the waste liquid of the lithium iron phosphate battery are quickly precipitated and separated;
2. (2) According to the present invention, the jaw-shaped connecting base, the separating frame, the material guide wheel and the collecting frame are adopted to form the stirring element, the connecting base, the separating frame and the collecting frame rotate together with the outer shaft of the rotary shaft, and the material guide wheel rotates together with the intermediate shaft of the rotary shaft, so that the material guide wheel with faster rotating speed can form a suction force at the lower end of the inner cavity of the collecting frame, so that the mixed solution quickly enters the inner cavity of the separating frame through the gap between the jaw-shaped connecting base and the separating frame, so that other metal elements precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery can be deposited in the inner cavity of the collecting frame under the action of the flowing solution, thereby achieving the goal of separating other metal elements in the waste liquid of the lithium iron phosphate battery and reducing complicated operations and precipitation filtering operations caused by manual stirring;
3. (3) According to the present invention, the specially shaped extension portion and the spiral recess arranged on the outer shaft can accelerate a flow rate of the mixed solution in the gap between the extension portion and the outer shaft and make the mixed solution quickly enter the inner cavity of the separation frame to separate and filter the precipitated metal;
4. (4) According to the present invention, by disposing the material guide plate between the extension portion and the upper opening cavity of the outer frame, a flow path of the mixed solution in the separation frame can be extended by the material guide plate, thereby ensuring that the mixed solution has a certain time for other metal elements to precipitate and agglomerate; and
5. (5) According to the present invention, by arranging the adjustable jaw arranged at the lower part of the base, an included angle between the connecting plate of the jaw and the base and an included angle between the connecting plate and the fixing plate can be adaptively adjusted according to a size of the bottle opening of the lithium extraction container, and after adjusting the angle, it is locked by the locking knob, so that the distance between the jaws can be adaptively adjusted according to the size of the bottle opening of the lithium extraction container, thereby ensuring that the adjusted jaws can realize stable clamping with the bottle opening of the lithium extraction container, thereby ensuring the stable use of the rotary member and the stirring member.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 is a schematic representation of a side view of the present invention;
• 2 is a schematic representation of a front view of the structure of the present invention.
• 3 is a schematic structural diagram of a cross section of a stirring element of the present invention;
• 4 is a schematic structural diagram of a plan view of the stirring element of the present invention; and
• 5 is a schematic structural diagram of a plan view of a material guide wheel of the present invention.

• 1 bezieht sich auf den Sockel, 2 bezieht sich auf den Verriegelungsknopf, 3 bezieht sich auf die Klemmbacke, 31 bezieht sich auf die Verbindungsplatte, 32 bezieht sich auf die Befestigungsplatte, 4 bezieht sich auf das Stützgestell, 41 bezieht sich auf die Begrenzungsplatte, 5 bezieht sich auf den ersten Motor, 6 bezieht sich auf das Drehelement, 61 bezieht sich auf den zweiten Motor, 62 bezieht sich auf das Verbindungsende, 63 bezieht sich auf die Drehwelle, 631 bezieht sich auf die innere Welle, 632 bezieht sich auf die äußere Welle, 633 bezieht sich auf die Materialführungsplatte, 64 bezieht sich auf das Stützende, 7 bezieht sich auf das Rührelement, 71 bezieht sich auf die backenförmige Verbindungsbasis, 72 bezieht sich auf den Trennrahmen, 721 bezieht sich auf den Verlängerungsabschnitt, 73 bezieht sich auf das Materialführungsrad, 731 bezieht sich auf den Verbindungsrahmen, 732 bezieht sich auf die Schaufel, 733 bezieht sich auf die Ablenkplatte, 74 bezieht sich auf den Sammelrahmen, 741 bezieht sich auf den inneren Zylinder, 742 bezieht sich auf die Filterplatte und 743 bezieht sich auf den äußeren Rahmen.

In the drawings, the elements represented by reference numerals are listed as follows:

• 1 refers to the base, 2 refers to the locking knob, 3 refers to the clamping jaw, 31 refers to the connecting plate, 32 refers to the fixing plate, 4 refers to the supporting frame, 41 refers to the limiting plate, 5 refers to the first motor, 6 refers to the rotary member, 61 refers to the second motor, 62 refers to the connecting end, 63 refers to the rotary shaft, 631 refers to the inner shaft, 632 refers to the outer shaft, 633 refers to the material guide plate, 64 refers to the supporting end, 7 refers to the stirring member, 71 refers to the jaw-shaped connecting base, 72 refers to the separating frame, 721 refers to the extension section, 73 refers to the material guide wheel, 731 refers to the connecting frame, 732 refers to the bucket, 733 refers to the baffle plate, 74 refers to the collecting frame, 741 refers to the inner cylinder, 742 refers to the filter plate, and 743 refers to the outer frame.

DETAILED DESCRIPTION

The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to illustrate the present invention, but are not to be understood as limiting the present invention.

Embodiment 1:

As in the 1 to 5 , a stirring mechanism for extracting lithium from the waste liquid of a lithium iron phosphate battery includes a base 1, a jaw 3, and a stirring mechanism. The jaw 3 is movably connected to both ends of the base 1; the base is provided with a support frame 4 at a lower portion, and the stirring mechanism is rotatably arranged in a center of the support frame 4 and extends to a lower portion of the support frame 4; the stirring mechanism includes a first motor 5, a rotary member 6, and a stirring member 7. The first motor 5 is fixed in the center of the base 1. The rotary member 6 is inserted in the center of the support frame 4, and the rotary member 6 includes a second motor 61, a connecting end 62, and a rotary shaft 63. The connecting end 62 has an "L"-shaped structure, an included angle between two end parts of the connecting end 62 is obtuse, and one end of the connecting end 62 is provided with an out output end of the first motor 5. The second motor 61 is fixed to an upper portion of the other end of the connecting end 62. The rotary shaft 63 includes an inner shaft 631 and an outer shaft 632. The outer shaft 632 is connected to a lower portion of the connecting end 62 below the second motor 61, and the inner shaft 631 is rotatably arranged in an inner cavity of the outer shaft 632 and connected to an output end of the second motor 61. The stirring element 7 is composed of a claw-shaped connecting base 71, a separating frame 72, a material guide wheel 73, and a collecting frame 74. The jaw-shaped connecting base 71 is connected to an outer lower end of the outer shaft 632. The separating frame 72 is connected to a lower end of the jaw-shaped connecting base 71. The collecting frame 74 is detachably connected to a lower part of the separating frame 72. The material guide wheel 73 is fixed to a lower end of an inner cavity of the collecting frame 74 and connected to a lower end of the inner shaft 631. A battery (not shown in the figure) is arranged inside the base 1 to supply power to the first motor 5 and the second motor 61. The stirring mechanism can be fixed to a bottle mouth of a lithium extraction container via the clamp jaw 3 and allows the stirring element 7 to be immersed in the waste liquid of the lithium iron phosphate battery inside the lithium extraction container. The rotation speed of the first motor 5 is lower than that of the second motor 61, so that the rotation speed after connecting the connecting base 71, the separation frame 72 and the collecting frame 74 is lower than the rotation speed of the material guide wheel 73, thereby ensuring that the solution can quickly enter the collecting frame 74 and the material guide wheel 73 after entering the separation frame 72. When rotating, the first motor 5 can rotate the connecting end 62 of the rotary member 6 and the outer shaft 632 of the rotary shaft 63, so that the connecting base 71, the separating frame 72 and the collecting frame 74 of the stirring member 7 rotate synchronously with the outer shaft 632 and further stir a mixed solution of the lithium iron phosphate battery waste liquid and a chemical preparation. Due to the obliquely arranged rotary member 6, the rotary member 6 and the stirring member 7 form a certain angle with the central axis of the container during rotation to expand the rotation and stirring range of the stirring member 7 and accelerate the mixing between the mixed solutions, so that other metal elements in the lithium iron phosphate battery waste liquid are quickly precipitated and agglomerated. During rotation of the stirring element 7, due to the special claw-shaped connecting base 71, a sufficient gap can be left between the claw-shaped connecting base 71 and the separating frame 72 after the two are connected to each other. Therefore, when rotating, the second motor 61 can rotate the inner shaft 631 and the material guide wheel 73, and the material guide wheel 73 can form a suction force at the lower end of the inner cavity of the collecting frame 74 at a faster rotation speed, so that the mixed solution can quickly enter the inner cavity of the separating frame 72 through the gap between the claw-shaped connecting bottom 71 and the separating frame 72, so that other metal elements precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery can be deposited in the inner cavity of the collecting frame 74 under the action of the flowing solution, thereby achieving the goal of separating other metal elements in the waste liquid of the lithium iron phosphate battery and reducing complicated operations and precipitation filtering operations caused by manual stirring.

As in 1 and 2 In this embodiment, the number of the jaws 3 is not less than three, and the jaw 3 includes a connecting plate 31 and a fixing plate 32. The connecting plate 31 is movably connected to the fixing plate 32, and an end of the connecting plate 31 remote from the fixing plate 32 is suspended from the base 1. A connection between the connecting plate 31 and the fixing plate 32 and a connection between the connecting plate 31 and the base 1 are both provided with a locking button 2 for locking the angle. In this embodiment, the fixing plate 32 is provided with an anti-skid on one side near the support frame 4. The number of the jaws 3 is preferably four, and the four jaws 3 are arranged around a circumference of the lower part of the base 1 at equal intervals to ensure that the base 1 can have good clamping stability when connected to the lithium extraction container via the jaws 3. An included angle between the connecting plate 31 and the base 1 and an included angle between the connecting plate 31 and the fixing plate 32 can be adaptively adjusted according to a size of a bottle opening of the lithium extraction container, and after adjustment, the angle is locked by the locking knob 2, so that the distance between the clamping jaws 3 can be adaptively adjusted according to the size of the bottle opening of the lithium extraction container, and the adjusted clamping jaws 3 can achieve stable clamping with the bottle opening of the lithium extraction container. The anti-slip member may be a rubber pad with anti-slip protrusions, which can not only ensure the anti-slip property of the fixing plate 32 and a side wall of the bottle opening of the lithium extraction container, but also avoid the wear of the fixing plate 32 when clamping the side wall of the lithium extraction container.

As in the 2 and 3 , in this embodiment, a middle portion of the rotary shaft 63 is provided with a support end 64; the center of the support frame 4 is provided with at least three limiting plates 41 for limiting the vibration amplitudes of a fixed end 61, the rotary shaft 63 and the support end 64, and a number of the limiting plates 41 is preferably three. When the fixed end 61 is connected to the rotary shaft 63, an angle of the rotary shaft 63 can be changed by the specially shaped connecting end 62, so that the stirring element 7 connected to the lower part of the rotary shaft 63 can also be inclined, which can change the angles between the rotary element 6 and the stirring element 7 and a central axis of the lithium extraction container and ensures that a larger stirring range can be achieved when the motor 5 drives the rotary element 6 and the stirring element 7 to rotate. The arrangement of the support end 64 can realize the connection between the rotary member 6 and the limit plate 41, which can better ensure the stability of the rotary member 6 when rotating and ensure that the rotary member 6 can drive the stirring member 7 to rotate and swing at a certain angle.

As in the 3 and 4 , the separating frame 72 in this embodiment is provided with a downwardly lowered funnel-shaped extension portion 721 at an upper end, and a gap is formed between the extension portion 721 and the outer shaft 632. A material guide plate 633 is provided on an outer side of the outer shaft 632 in an inner cavity of the separating frame 72, and a spiral recess (not marked in the figure) is provided on an outer side wall of the outer shaft 632 at the extension portion 721 above the material guide plate 633. In this embodiment, the collecting frame 74 includes an inner cylinder 741, a filter plate 742, and an outer frame 743. The inner cylinder 741 is located above an inner cavity of the outer frame 743 and is arranged coaxially with the outer frame 743. The filter plate 742 is arranged in a central portion of the inner cavity of the outer frame 743 and connected to a lower end of the inner cylinder 741 to divide the outer frame 743 into an upper opening cavity and a lower open cavity. The upper opening cavity of the outer frame 743 extends below the material guide plate 633 in the partition frame 72. In this embodiment, the material guide wheel 73 is arranged in the lower opening cavity of the outer frame 743, and the material guide wheel 73 includes a connecting frame 731, blades 732 and a deflector plate 733 arranged one behind the other. The connecting frame 731 is annular and has a channel in the center. The hook-shaped blades 732 are arranged circumferentially between the connecting frame 731 and the baffle plate 733, and the thickness of an end of the blade 732 near a central point of the connecting frame 731 and the baffle plate 733 is smaller than that of an end of the blade 732 near an outer periphery of the connecting frame 731 and the baffle plate 733. A lower end of the inner shaft 631 passes through the channel of the connecting frame 731 and is connected to the baffle plate 733. A middle upper portion of the outer frame 743 may be spirally connected to the lower end of the partition frame 72 so that the partition frame 72 and the collecting frame 74 can be conveniently disassembled, which is advantageous for disassembly and cleaning of the agitator 7. The specially shaped extension portion 721 and the spiral recess arranged on the outer shaft 632 can accelerate the flow rate of the mixed solution in the gap between the extension portion 721 and the outer shaft 632 and promote the rapid entry of the mixed solution into the inner cavity of the separation frame 72. The inner cylinder 741 can be used for assembly guidance between the collecting frame 74 and the outer shaft 632 to ensure that the collecting frame 74 can be positioned by the outer shaft 632 when it is spirally assembled into the lower end of the separation frame 72. The filter plate 742 arranged in the center of the collecting frame 74 can effectively isolate other metal elements precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery and ensure that other metal elements precipitated and agglomerated can be separated from the lithium carbonate solution and collected in the collecting frame 74. The material guide plate 633, which is arranged between the extension portion 721 and the upper opening cavity of the outer frame 743, can extend a flow path of the mixed solution in the separation frame 72, thus ensuring that the mixed solution has a certain time for other metal elements to precipitate and agglomerate. When the specially shaped material guide wheel 73 rotates synchronously with the inner shaft 631, the solution flowing from the upper opening cavity of the collecting frame 74 to the lower opening cavity of the collecting frame 74 can flow through the channel of the connecting frame 731 and reach the blades 732. Since the baffle plate 733 blocks the flow of the solution, the solution can be guided by the blades 732 and spread circumferentially along an outer circumferential direction of the material guide wheel 73 and move downward under the block of the outer frame 743 at the lower end of the collecting frame 74, thereby further promoting the flow of the solution by secondary acceleration blocking and accelerating a mixing effect of the waste liquid of the lithium iron phosphate battery and the chemical preparation.

In summary, according to the stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery provided by the present invention, by using the obliquely arranged rotating member 6, the rotating member 6 and the stirring member 7 form a certain angle with a central axis of the container during rotation while rotating with the motor 5 to expand the rotating and stirring range of the stirring member 7 and accelerate the mixing between the mixed solutions, so that other metal elements in the waste liquid of the lithium iron phosphate battery are quickly precipitated and agglomerated. The specially shaped stirring element 7 can make the solution reach the extension portion 721 of the separation frame 72 and quickly enter the inner cavity of the separation frame 72 under the action of the suction force generated by the rotation of the material guide wheel 73, so that other metal elements precipitated from the waste liquid of the lithium iron phosphate battery can be precipitated in the inner cavity of the collection frame 74 under the action of the flowing solution, thereby achieving the goal of separating other metal elements from the waste liquid of the lithium iron phosphate battery.

In the descriptions of the specification, the descriptions with reference to the terms "an embodiment", "some embodiments", "example", "specific example" or "some examples", etc., mean that specific features, structures, materials or properties described with reference to the embodiments or examples are included in at least one embodiment or example of the present invention. In the description, the schematic representation of the above terms should not be understood to necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or properties may be combined in one or more embodiments or examples in any suitable manner. Moreover, those skilled in the art can connect and combine various embodiments or examples described in the description.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those having ordinary skill in the art may make changes, modifications, substitutions and variations of the above embodiments within the scope of the present invention.

Claims (7)

A stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, comprising a base (1), a jaw (3) and a stirring mechanism; wherein the jaw (3) is movably connected to both ends of the base (1), the base (1) is provided with a support frame (4) at a lower portion, and the stirring mechanism is rotatably arranged at a center of the support frame (4) and extends to a lower portion of the support frame (4); wherein the stirring mechanism comprises a first motor (5), a rotary member (6) and a stirring member (7); the first motor (5) is fixed at a center of the base (1); the rotary member (6) is inserted at the center of the support frame (4), and the rotary member (6) comprises a second motor (61), a connecting end (62) and a rotary shaft (63); the connecting end (62) has an "L"-shaped structure, an included angle between two end portions of the connecting end (62) is obtuse, and one end of the connecting end (62) is connected to an output end of the first motor (5); the second motor (61) is fixed to an upper portion of the other end of the connecting end (62); the rotary shaft (63) comprises an inner shaft (631) and an outer shaft (632); the outer shaft (632) is connected to a lower portion of the connecting end (62) below the second motor (61), and the inner shaft (631) is rotatably arranged in an inner cavity of the outer shaft (632) and connected to an output end of the second motor (61); the stirring element (7) comprises a jaw-shaped connecting base (71), a separating frame (72), a material guide wheel (73) and a collecting frame men (74); the jaw-shaped connecting base (71) is connected to an outer lower end of the outer shaft (632); the separating frame (72) is connected to a lower end of the jaw-shaped connecting base (71); the collecting frame (74) is detachably connected to a lower portion of the separating frame (72); and the material guide wheel (73) is fixed to a lower end of an inner cavity of the collecting frame (74) and connected to a lower end of the inner shaft (631). The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery after Claim 1 , wherein the number of the clamping jaws (3) is not less than three, and the clamping jaws (3) comprise a connecting plate (31) and a fixing plate (32); the connecting plate (31) is movably connected to the fixing plate (32), and an end of the connecting plate (31) remote from the fixing plate (32) is suspended from the base (1); and a connection between the connecting plate (31) and the fixing plate (32) and a connection between the connecting plate (31) and the base (1) are both provided with a locking button (2) for locking the angle. The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery after Claim 2 , wherein the fastening plate (32) is provided with a slip protection on one side near the support frame. The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to one of the Claims 1 until 3 , wherein a central portion of the rotary shaft (63) is provided with a support end (64); and the center of the support frame (4) is provided with at least three limiting plates (41) for limiting the vibration amplitudes of a fixed end (61), the rotary shaft (63) and the support end (64). The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to one of the Claims 1 until 3 , wherein the separating frame (72) is provided at an upper end with a downwardly lowered funnel-shaped extension portion (721) and a gap is formed between the extension portion (721) and the outer shaft (632); and a material guide plate (633) is provided on an outer side of the outer shaft (632) in an inner cavity of the separating frame (72), and a spiral recess is provided on an outer side wall of the outer shaft (632) at the extension portion (721) above the material guide plate (633). The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery after Claim 5 , wherein the collecting frame (74) comprises an inner cylinder (741), a filter plate (742) and an outer frame (743); the inner cylinder (741) is located above an inner cavity of the outer frame (743) and is arranged coaxially with the outer frame (743); the filter plate (742) is arranged in a middle portion of the inner cavity of the outer frame (743) and is connected to a lower end of the inner cylinder (741) to divide the outer frame (743) into an upper opening cavity and a lower opening cavity; and the upper opening cavity of the outer frame (743) extends below the material guide plate (633) in the separating frame (72). The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery after Claim 6 , wherein the material guide wheel (73) is arranged in the lower opening cavity of the outer frame (743), and the material guide wheel comprises a connecting frame (731), blades (732) and a deflection plate (733) arranged one behind the other; the connecting frame (731) is annular with a channel at a center; the hook-shaped blades (732) are arranged circumferentially between the connecting frame (731) and the deflection plate (733), and the thickness of an end of the blade (732) near a central point of the connecting frame (731) and the deflection plate (733) is smaller than that of an end of the blade (732) near an outer periphery of the connecting frame (731) and the deflection plate (733); and a lower end of the inner shaft (631) passes through the channel of the connecting frame (731) and is connected to the deflection plate (733).

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