A mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetroxide

Abstract

This utility model relates to the field of manganese tetroxide preparation technology based on manganese sulfate, and discloses a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-based manganese tetroxide. The device includes a mixing tank for holding lithium source and manganese sulfate. A first motor for driving the mixing is fixedly connected to the top of the mixing tank. A mixing mechanism for mixing the lithium source and manganese sulfate is rotatably connected to the inner cavity of the mixing tank. First, the lithium source and manganese sulfate are stored in two separate storage tanks and then transported to the mixing tank via a conveying pipe. The first motor drives the mixing mechanism through a connecting line. The rotating shaft drives the driving plate to rotate eccentrically, causing the first connecting shaft to move eccentrically. After the second motor starts, it drives the rotating column to rotate, causing the first connecting column to move in an inclined circular motion at a 45° angle. Then, through the second connecting shaft, the driving column, and other components, the stirring paddle rotates around the third connecting shaft. Its 60° angled blade surface creates turbulence in the material, achieving thorough mixing. The mixed material is discharged from the discharge trough.

Description

Technical Field

[0001] This utility model relates to the field of manganese tetroxide preparation technology, specifically, to a mixing and feeding device for preparing lithium manganate from manganese tetroxide. Background Technology

[0002] Currently, the main methods for preparing manganese tetroxide on the market are divided into metallic manganese type and manganese sulfate type. Among them, manganese tetroxide prepared by metallic manganese has stable performance, but the preparation cost is high and the market price of metallic manganese fluctuates greatly. This method is generally used in the industry to prepare manganese tetroxide. Manganese sulfate type manganese tetroxide has slightly poor stability and has not been recognized by the market, but the price is lower and the cost advantage is obvious. In addition, the existing manganese tetroxide feeding device cannot provide a material basis for precise proportioning and uniform mixing for subsequent low temperature solid phase method and gradient calcination process.

[0003] For example, CN119284960A discloses a method for preparing high-purity manganese tetroxide (MNT) for high-end lithium manganese oxide using manganese sulfate. The method uses manganese sulfate as raw material, first prepares seed crystals and then performs oxidation synthesis to allow the seed crystals to grow slowly. It does not require any additives and eliminates complex processes such as roasting and crushing. It can prepare MNT particles of different sizes. The prepared MNT products have high sphericity, controllable particle size distribution, high tap density, and low specific surface area. The process has the advantages of high automation, improved physicochemical properties of MNT, and reduced impurity content in the product.

[0004] Existing manganese tetroxide feeding devices cannot provide a precisely proportioned and uniformly mixed material base for subsequent low-temperature solid-state methods and gradient calcination processes. This deficiency directly leads to the difficulty in achieving the ideal stoichiometric ratio during the material reaction process in subsequent processes. This not only reduces the purity and performance of the product but may also trigger side reactions, increasing the cost of impurity treatment during production. At the same time, uneven material mixing can lead to inconsistent reaction rates, causing local over- or under-reaction, affecting overall production efficiency and product quality stability, and adversely impacting large-scale production. Therefore, those skilled in the art provide a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide, thereby solving the problems in the prior art.

[0006] This utility model provides the following technical solution: a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide, comprising a mixing tank for placing lithium source and manganese sulfate, a first motor for driving the mixing is fixedly connected to the top of the mixing tank, a mixing mechanism for mixing lithium source and manganese sulfate is rotatably connected to the inner cavity of the mixing tank, a storage tank for storing materials is fixedly provided on one side of the mixing tank, a conveying pipe for conveying materials is fixedly connected between the storage tank and the mixing tank, two sets of storage tanks and conveying pipes are provided, the two sets of storage tanks are respectively used to store lithium source and manganese sulfate, the two sets of conveying pipes are respectively used to convey lithium source and manganese sulfate, and a discharge trough for discharging the mixed material is fixedly connected to one side of the bottom of the mixing tank.

[0007] As a preferred embodiment of the above technical solution, the mixing mechanism includes a first fixed column, which is fixedly connected to the top of the mixing tank. A rotating shaft is rotatably connected to the top of the inner cavity of the mixing tank, and the rotating shaft is electrically connected to a first motor through the first fixed column and the mixing tank.

[0008] As a preferred embodiment of the above technical solution, a driving plate is fixedly connected to the bottom end of the rotating shaft. The driving plate has a disc-shaped structure, and its inner cavity has a mounting hole along the circumferential direction. The axis of the mounting hole is parallel to and not collinear with the rotation center axis of the driving plate. A first connecting shaft is fixedly connected to the inner cavity of the mounting hole.

[0009] As a preferred embodiment of the above technical solution, a second motor is fixedly connected to the bottom end of the first connecting shaft, a rotating column is rotatably connected to the bottom end of the second motor, a first connecting column is fixedly connected to the side end of the rotating column, and the acute angle formed by the intersection of the axis of the first connecting column and the axis of the rotating column is 45°.

[0010] As a preferred embodiment of the above technical solution, the inner cavity of the first connecting column is rotatably connected to a second connecting shaft, the bottom end of the second connecting shaft is fixedly connected to a driving column, the bottom end of the driving column is fixedly connected to a second connecting column, the bottom end of the second connecting column is fixedly connected to a third connecting shaft, the outer side of the third connecting shaft is fixedly connected to a stirring paddle, and the blade surface of the stirring paddle forms a 60° angle with the axis of the third connecting shaft, and the stirring paddle is evenly distributed along the circumference of the third connecting shaft.

[0011] As a preferred embodiment of the above technical solution, a second fixed column is fixedly connected to the outer side of the second motor, a third connecting column is fixedly connected to one side of the second fixed column, a rotating frame is rotatably connected to one end of the third connecting column, a fourth connecting shaft is rotatably connected to the inner cavity of the rotating frame, the rotating frame is rotatably connected to the driving column through the fourth connecting shaft, and the axis of the fourth connecting shaft intersects perpendicularly with the axis of the driving column.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention features a mixing mechanism. Lithium source and manganese sulfate are stored in two separate storage tanks and transported to a mixing tank via a conveying pipe. A first motor drives the mixing mechanism via a connecting cable. A rotating shaft drives a drive plate to rotate eccentrically, causing the first connecting shaft to move eccentrically. After the second motor starts, it drives a rotating column to rotate, causing the first connecting column to move in a 45° angled circular motion. This, in turn, through the second connecting shaft, drive column, and other components, causes the stirring paddle to rotate around a third connecting shaft. The 60° angled blades create turbulence in the material, achieving thorough mixing. The mixed material is then discharged from the discharge trough.

[0013] Based on the above-mentioned beneficial effects, this utility model is equipped with a dual storage tank and a conveying pipe to ensure that the lithium source and manganese sulfate are accurately fed according to the required lithium-manganese molar ratio (1.05-1.1:2) for the project. The complex movement of the mixing mechanism helps to achieve the uniform mixing of materials required by the project, providing a good material mixing basis for the subsequent preparation of lithium manganese oxide using the low-temperature solid-state method and gradient calcination process (such as 650℃ pre-calcination + 750℃ final calcination). This helps to improve the overall stability of the material and meet the key indicators such as the first discharge specific capacity. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a mixing and feeding device for preparing lithium manganate from manganese sulfate-type manganese tetroxide; Figure 2 A schematic diagram of the storage tank connection of a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide; Figure 3 A schematic diagram of the connection of the first fixed column of the mixing mechanism in a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide. Figure 4 A schematic diagram of the mixing mechanism and stirring paddle connection of a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate-type manganese tetroxide.

[0015] In the diagram: 1. Mixing tank; 2. First motor; 3. Mixing mechanism; 31. First fixed column; 32. Rotating shaft; 33. Driving plate; 34. First connecting shaft; 35. Second motor; 36. Rotating column; 37. First connecting column; 38. Second connecting shaft; 39. Driving column; 310. Second connecting column; 311. Third connecting shaft; 312. Stirring paddle; 313. Second fixed column; 314. Third connecting column; 315. Rotating frame; 316. Fourth connecting shaft; 4. Storage tank; 5. Conveying pipe; 6. Discharge chute. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figure 1 - Figure 4 As shown, this utility model provides a technical solution: a mixing and feeding device for preparing lithium manganese oxide from manganese sulfate type manganese tetroxide, including a mixing tank 1 for feeding lithium source and manganese sulfate, a first motor 2 for driving the mixing is fixedly connected to the top of the mixing tank 1, a mixing mechanism 3 for mixing lithium source and manganese sulfate is rotatably connected to the inner cavity of the mixing tank 1, a storage tank 4 for storing materials is fixedly provided on one side of the mixing tank 1, a conveying pipe 5 for conveying materials is fixedly connected between the storage tank 4 and the mixing tank 1, two sets of storage tank 4 are provided, the two sets of storage tank 4 are respectively used to store lithium source and manganese sulfate, the two sets of conveying pipe 5 are respectively used to convey lithium source and manganese sulfate, and a discharge trough 6 for discharging the mixed material is fixedly connected to one side of the bottom of the mixing tank 1.

[0018] During material mixing, the lithium source and manganese sulfate are stored in two separate sets of storage tanks 4. When mixing is required, the lithium source and manganese sulfate are conveyed to the mixing tank 1 through the conveying pipe 5. The first motor 2 starts and transmits power to the mixing mechanism 3 through the connecting line, causing the mixing mechanism 3 to rotate inside the mixing tank 1, thereby stirring and mixing the lithium source and manganese sulfate. After mixing, the mixture is discharged from the discharge chute 6 at the bottom of the mixing tank 1. During this process, the mixing tank 1 is used to hold the lithium source and manganese sulfate, and its top connecting line is connected to the first motor 2, which provides power to the mixing mechanism 3, ensuring that the lithium source and manganese sulfate are fully mixed in the mixing tank 1. The storage tanks 4 and the conveying pipe 5 are set in two sets to store and convey the lithium source and manganese sulfate respectively, ensuring the orderly and accurate conveying of materials and avoiding mixing chaos during the conveying process. The discharge chute 6 at the bottom of the mixing tank 1 facilitates the smooth discharge of the mixed material, providing convenience for subsequent processes.

[0019] As one implementation method in this embodiment, please refer to Figure 1 - Figure 3 As shown, the mixing mechanism 3 includes a first fixed column 31, which is fixedly connected to the top of the mixing tank 1. A rotating shaft 32 is rotatably connected to the top of the inner cavity of the mixing tank 1. The rotating shaft 32 is electrically connected to the first motor 2 through the first fixed column 31 and the mixing tank 1.

[0020] The first motor 2 transmits electricity through a connecting wire. The current is conducted through the mixing tank 1 and the first fixed column 31 to the rotating shaft 32, giving the rotating shaft 32 power to start rotating. The rotation of the rotating shaft 32 provides the basic power for the overall operation of the mixing mechanism 3, driving subsequent components such as the driving plate 33 and the first connecting shaft 34 to move in sequence, thereby realizing the stirring and mixing of materials in the mixing tank 1. During this process, the first fixed column 31 is fixed at the top of the mixing tank 1, which can fix and support the rotating shaft 32, ensuring that the rotating shaft 32 rotates stably at the top of the inner cavity of the mixing tank 1. The rotating shaft 32 is electrically connected to the first motor 2 through the first fixed column 31 and the mixing tank 1, which can effectively transmit the power of the first motor 2, so that the rotating shaft 32 rotates smoothly, thereby driving the other components of the mixing mechanism 3 to work and realize the mixing of materials.

[0021] As one implementation method in this embodiment, please refer to Figure 1 - Figure 3 As shown, a drive plate 33 is fixedly connected to the bottom end of the rotating shaft 32. The drive plate 33 has a disc-shaped structure, and its inner cavity has a mounting hole along the circumferential direction. The axis of the mounting hole is parallel to and not collinear with the rotation center axis of the drive plate 33. A first connecting shaft 34 is fixedly connected to the inner cavity of the mounting hole.

[0022] When the rotating shaft 32 rotates, it drives the driving plate 33 to rotate as well. Due to the eccentric setting of the mounting hole, when the driving plate 33 rotates, the first connecting shaft 34 will make an eccentric circular motion around the rotation center of the driving plate 33. This eccentric motion is transmitted to subsequent components such as the second motor 35 through the first connecting shaft 34, causing the entire stirring system to generate complex motion, thereby more thoroughly stirring the materials in the mixing tank 1.

[0023] As one implementation method in this embodiment, please refer to Figure 1 - Figure 3 As shown, a second motor 35 is fixedly connected to the bottom end of the first connecting shaft 34, a rotating column 36 is rotatably connected to the bottom end of the second motor 35, and a first connecting column 37 is fixedly connected to the side end of the rotating column 36. The acute angle formed by the intersection of the axis of the first connecting column 37 and the axis of the rotating column 36 is 45°.

[0024] The eccentric motion of the first connecting shaft 34 drives the second motor 35 to move, and the second motor 35 itself starts, driving the rotating column 36 to rotate. When the rotating column 36 rotates, since the first connecting column 37 is connected to the rotating column 36 at a 45° angle, the first connecting column 37 rotates along with the rotating column 36, forming an inclined circular motion trajectory during the rotation. This trajectory allows the first connecting column 37 to stir in different areas within the mixing tank 1, expanding the stirring range, enhancing the stirring force, and helping to mix the materials more evenly.

[0025] As one implementation method in this embodiment, please refer to Figure 1 - Figure 4 As shown, the inner cavity of the first connecting column 37 is rotatably connected to the second connecting shaft 38. The bottom end of the second connecting shaft 38 is fixedly connected to the driving column 39. The bottom end of the driving column 39 is fixedly connected to the second connecting column 310. The bottom end of the second connecting column 310 is fixedly connected to the third connecting shaft 311. The outer side of the third connecting shaft 311 is fixedly connected to the stirring paddle 312. The blade surface of the stirring paddle 312 forms a 60° angle with the axis of the third connecting shaft 311. The stirring paddle 312 is evenly distributed along the circumference of the third connecting shaft 311.

[0026] When the first connecting column 37 rotates, it drives the driving column 39 to move via the second connecting shaft 38. The driving column 39 then transmits power to the stirring paddle 312 via the second connecting column 310 and the third connecting shaft 311. After receiving power, the stirring paddle 312 rotates around the third connecting shaft 311. Since the blade surface forms a 60° angle with the axis, the rotation generates an inclined thrust on the material, causing the material to move not only in the circumferential direction but also to flow in the vertical direction, forming complex turbulent motion. This turbulent motion can effectively break up the agglomeration of the material, allowing the lithium source and manganese sulfate to mix thoroughly, improving mixing uniformity and efficiency.

[0027] As one implementation method in this embodiment, please refer to Figure 1 - Figure 4 As shown, a second fixed column 313 is fixedly connected to the outer side of the second motor 35, a third connecting column 314 is fixedly connected to one side of the second fixed column 313, a rotating frame 315 is rotatably connected to one end of the third connecting column 314, a fourth connecting shaft 316 is rotatably connected to the inner cavity of the rotating frame 315, the rotating frame 315 is rotatably connected to the driving column 39 through the fourth connecting shaft 316, and the axis of the fourth connecting shaft 316 intersects the axis of the driving column 39 perpendicularly.

[0028] The second fixed column 313 is fixed inside the mixing tank 1 and connected to the rotating frame 315 via the third connecting column 314. When the driving column 39 performs complex movements under the drive of the second motor 35 and the first connecting column 37, the driving column 39 is connected to the rotating frame 315 via the fourth connecting shaft 316, and the rotating frame 315 can rotate around the fourth connecting shaft 316. Since the fourth connecting shaft 316 intersects the axis of the driving column 39 perpendicularly, the rotation of the rotating frame 315 can adapt to the movement of the driving column 39 in different directions, providing support and guidance for the driving column 39, keeping it stable during movement, and preventing swaying or deviation due to complex movements. This ensures the stable operation of the entire mixing system and guarantees the mixing effect and quality of the materials.

[0029] Working principle: The lithium source and manganese sulfate are stored in two sets of storage tanks 4 respectively, and transported to the mixing tank 1 through the conveying pipe 5. The first motor 2 drives the mixing mechanism 3 to operate through the connecting line. The rotating shaft 32 drives the driving plate 33 to rotate eccentrically, causing the first connecting shaft 34 to generate eccentric motion. After the second motor 35 starts, it drives the rotating column 36 to rotate, causing the first connecting column 37 to make an inclined circular motion at a 45° angle. Then, through the second connecting shaft 38, the driving column 39 and other components, the stirring paddle 312 rotates around the third connecting shaft 311. Its 60° angled blade surface creates turbulence in the material, achieving full mixing. The mixed material is discharged from the discharge trough 6.

[0030] The device, through the setup of dual storage tanks 4 and conveying pipes 5, ensures that the lithium source and manganese sulfate are accurately fed at the required lithium-manganese molar ratio (1.05-1.1:2) as specified in the project. The complex movement of the mixing mechanism 3 helps to achieve the uniform mixing of materials required by the project. This provides a good material mixing basis for the subsequent preparation of lithium manganese oxide using low-temperature solid-state method and gradient calcination process (such as 650℃ pre-calcination + 750℃ final calcination), which helps to improve the overall stability of the material and meet the key requirements such as the first discharge specific capacity.

[0031] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetroxide, characterized in that: The system includes a mixing tank (1) for storing lithium source and manganese sulfate. A first motor (2) for driving the mixing is fixedly connected to the top of the mixing tank (1). A mixing mechanism (3) for mixing lithium source and manganese sulfate is rotatably connected to the inner cavity of the mixing tank (1). A storage tank (4) for storing materials is fixedly provided on one side of the mixing tank (1). A conveying pipe (5) for conveying materials is fixedly connected between the storage tank (4) and the mixing tank (1). There are two sets of storage tanks (4) and conveying pipes (5). The two sets of storage tanks (4) are used to store lithium source and manganese sulfate respectively. The two sets of conveying pipes (5) are used to convey lithium source and manganese sulfate respectively. A discharge trough (6) for discharging materials after mixing is fixedly connected to one side of the bottom of the mixing tank (1).

2. The mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetraoxide according to claim 1, characterized in that: The mixing mechanism (3) includes a first fixed column (31), which is fixedly connected to the top of the mixing tank (1). The top of the inner cavity of the mixing tank (1) is rotatably connected to a rotating shaft (32), which is electrically connected to the first motor (2) through the first fixed column (31) and the mixing tank (1).

3. The mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetroxide according to claim 2, characterized in that: The bottom end of the rotating shaft (32) is fixedly connected to a driving plate (33). The driving plate (33) has a disc-shaped structure and an installation hole is opened in its inner cavity along the circumferential direction. The axis of the installation hole is parallel to and not collinear with the rotation center axis of the driving plate (33). The inner cavity of the installation hole is fixedly connected to a first connecting shaft (34).

4. The mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetraoxide according to claim 3, characterized in that: The bottom end of the first connecting shaft (34) is fixedly connected to a second motor (35), the bottom end of the second motor (35) is rotatably connected to a rotating column (36), the side end of the rotating column (36) is fixedly connected to a first connecting column (37), and the acute angle formed by the intersection of the axis of the first connecting column (37) and the axis of the rotating column (36) is 45°.

5. The mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetroxide according to claim 4, characterized in that: The inner cavity of the first connecting column (37) is rotatably connected to the second connecting shaft (38). The bottom end of the second connecting shaft (38) is fixedly connected to the driving column (39). The bottom end of the driving column (39) is fixedly connected to the second connecting column (310). The bottom end of the second connecting column (310) is fixedly connected to the third connecting shaft (311). The outer side of the third connecting shaft (311) is fixedly connected to the stirring paddle (312). The blade surface of the stirring paddle (312) forms a 60° angle with the axis of the third connecting shaft (311). The stirring paddle (312) is evenly distributed along the circumference of the third connecting shaft (311).

6. The mixed feeding device for preparing lithium manganate from manganese sulfate type trimanganese tetroxide according to claim 4, characterized in that: The second motor (35) is fixedly connected to a second fixed column (313) on the outside. A third connecting column (314) is fixedly connected to one side of the second fixed column (313). A rotating frame (315) is rotatably connected to one end of the third connecting column (314). A fourth connecting shaft (316) is rotatably connected to the inner cavity of the rotating frame (315). The rotating frame (315) is rotatably connected to the driving column (39) through the fourth connecting shaft (316). The axis of the fourth connecting shaft (316) intersects perpendicularly with the axis of the driving column (39).

Images