An apparatus for improving the flowability of a lithium salt product

Abstract

The utility model relates to a device that improves the solid flowability of lithium salt products. Its technical solution is that a stock bin and a stock bin frame are installed on the upper part of a support, a pipeline crusher is installed at the lower end discharge port of the stock bin, the discharge port is connected to the feed port of a screw conveyor through a pipeline, the discharge port is connected to an intermediate hopper through a material conveying pipe, a material conveying belt is provided below the intermediate hopper, the lithium salt products are conveyed to the counter-roller of a dry granulator through the material conveying belt, a screening drum is provided below the counter-roller, and a lithium salt granule hopper is provided below the screening drum. The utility model has the beneficial effect that the dried lithium salt is fed into the pipeline crusher through the stock bin, the powder particles are conveyed into the dry granulator through the screw conveyor after being crushed and reformed by the pipeline crusher, the pressure, rotational speed, and mesh count of the counter-roller of the dry granulator are adjusted, and the lithium salt is prepared into particles with a diameter of 2-5 mm, thereby improving the flowability of the lithium salt solid product and facilitating filling and sub-packaging.

Description

Technical Field

[0001] This utility model relates to the field of lithium salt product conveying technology, and in particular to a device for improving the solid flowability of lithium salt products. Background Technology

[0002] Lithium salt additives such as lithium fluoride, lithium carbonate, lithium difluorophosphate, and lithium difluorooxalate borate require filling and dispensing operations during production. Due to the inherent molecular and crystal structures of lithium salts, as well as manufacturing processes, the resulting battery-grade pure products exhibit uneven particle size distribution and irregular morphology, leading to poor flowability of the solid lithium salt products. This makes filling and dispensing difficult, impacting production efficiency. Furthermore, the flowability issues of the lithium salt products during subsequent use cause difficulties in feeding, failing to meet customer requirements. Therefore, a device needs to be designed to improve the flowability of solid lithium salt products without compromising product quality. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a device for improving the solid flowability of lithium salt products. This device involves drying the lithium salt, then crushing and reforming it in a pipeline crusher, and finally conveying it via a screw conveyor into a dry granulator to prepare solid particles of a certain diameter. This improves the flowability of the solid lithium salt product without affecting product quality, making it easier to fill and dispense.

[0004] The present invention relates to a device for improving the solid flowability of lithium salt products. The technical solution is as follows: it includes a support (1), a silo (2), a pipe crusher (3), a screw conveyor (4), a dry granulator (5), and a silo frame (6). The silo (2) and the silo frame (6) are installed on the upper part of the support (1). The pipe crusher (3) is installed at the lower end of the silo (2). The outlet of the pipe crusher (3) is connected to the inlet of the screw conveyor (4) through a pipeline. The outlet of the screw conveyor (4) is connected to the intermediate hopper (5.2) through a conveying pipe (4.1). A conveying belt (5.1) is provided below the intermediate hopper (5.2). The lithium salt product is conveyed to the rollers (5.3) of the dry granulator (5) through the conveying belt (5.1). A first screening roller (5.4) is provided below the rollers (5.3). A lithium salt particle hopper (5.5) is installed below the first screening roller (5.4).

[0005] Preferably, a rolling cutter (5.6) is installed on the outer side of the aforementioned rollers (5.3).

[0006] Preferably, a first screening screen (5.7) is provided on the lower side of the first screening roller (5.4).

[0007] Preferably, a second screening drum (5.8) is installed on the lower side of the first screening screen (5.7), and a second screening screen (5.9) is installed on the lower side of the second screening drum (5.8).

[0008] Preferably, the mesh size of the second screening screen (5.9) is greater than that of the first screening screen (5.7).

[0009] Preferably, an exhaust cover (2.1) is installed on the upper part of the hopper (2), and an exhaust pipe (2.2) is installed on the upper part of the exhaust cover (2.1).

[0010] Preferably, the above-mentioned pipe crusher (3) includes a crushing conveying pipe (3.1), a crushing rotor (3.2), and a guide port (3.3). The crushing rotor (3.2) is installed inside the pipe crusher (3). The guide port (3.3) is provided at the upper part of the pipe crusher (3), and the crushing conveying pipe (3.1) is provided at the lower part. The lower end of the crushing conveying pipe (3.1) is located at the feed inlet of the screw conveyor (4).

[0011] The beneficial effects of this invention are as follows: This invention does not add any binder. By feeding the dried and qualified lithium salt, such as lithium difluorooxalate borate, into the pipeline crusher through the silo, and after crushing and reorganizing by the pipeline crusher, the powder particles are then conveyed into the dry granulator by the screw conveyor. By adjusting the pressure, speed, and screen mesh of the dry granulator between the rollers, the lithium salt is prepared into solid particles with a diameter of 2-5mm. Thus, without affecting the product quality, the fluidity of the lithium salt solid product is improved, making it easier to fill and dispense, and improving the efficiency in production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; In the diagram: 1. Support frame; 2. Hopper; 3. Pipe crusher; 4. Screw conveyor; 5. Dry granulator; 6. Hopper frame; 2.1. Exhaust cover; 2.2. Exhaust pipe; 3.1. Crushing and conveying pipe; 3.2. Crushing rotor; 3.3. Guide port; 4.1. Conveying pipe; 5.1. Conveying belt; 5.2. Intermediate hopper; 5.3. Double roller; 5.4. First screening drum; 5.5. Lithium salt granule hopper; 5.6. Rolling cutter; 5.7. First screening screen; 5.8. Second screening drum; 5.9. Detailed Implementation

[0013] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0014] Example 1, referring to Figure 1 This utility model discloses a device for improving the solid flowability of lithium salt products, comprising a support 1, a silo 2, a pipe crusher 3, a screw conveyor 4, a dry granulator 5, and a silo frame 6. The silo 2 and the silo frame 6 are installed on the upper part of the support 1. The pipe crusher 3 is installed at the lower outlet of the silo 2. The outlet of the pipe crusher 3 is connected to the inlet of the screw conveyor 4 via a pipeline. The outlet of the screw conveyor 4 is connected to the intermediate hopper 5.2 via a conveying pipe 4.1. A conveying belt 5.1 is provided below the intermediate hopper 5.2 to transport the lithium salt products to the rollers 5.3 of the dry granulator 5. Below the rollers 5.3 is a first screening roller 5.4, and below the first screening roller 5.4 is a lithium salt granule hopper 5.5.

[0015] Among them, a rolling cutter 5.6 is installed on the outer side of the roller 5.3 mentioned above, which is used to further cut and crush the extruded lithium salt material.

[0016] The first screening drum 5.4 is provided with a first screening screen 5.7 on its lower side. After cutting and crushing, the powder is screened through the first screening screen 5.7. The powder is collected and granulated again. Particles that meet the particle size are collected and filled.

[0017] The dry granulator 5 mentioned in this utility model mainly adopts roller extrusion granulation technology. Relying on intermolecular attraction such as van der Waals force, adsorption force, crystal bridge and embedded connection, it turns the original powdery material with poor flow into 2-5mm granular powder, while improving the bulk density and reducing the problem of product deterioration caused by air between powders.

[0018] In addition, an exhaust cover 2.1 is installed on the upper part of the aforementioned silo 2, and an exhaust pipe 2.2 is installed on the upper part of the exhaust cover 2.1. By introducing nitrogen or dry air with a dew point of -85℃ to -65℃, moisture can be discharged through the exhaust cover 2.1 and the exhaust cover 2.2, so that the lithium salt material in the silo can achieve the drying function.

[0019] Furthermore, the aforementioned pipe crusher 3 includes a crushing and conveying pipe 3.1, a crushing rotor 3.2, and a guide port 3.3. The crushing rotor 3.2 is installed inside the pipe crusher 3. The guide port 3.3 is provided at the upper part of the pipe crusher 3, and the crushing and conveying pipe 3.1 is provided at the lower part. The lower end of the crushing and conveying pipe 3.1 is located at the feed inlet of the screw conveyor 4.

[0020] When using this utility model, Lithium salts, such as lithium difluorooxalate borate, are first dried in silo 2. Nitrogen or dry air with a dew point of -85℃ to -65℃ is used to expel moisture through exhaust cover 2.1. The dried lithium salt material is then discharged through the outlet of silo 2 to the discharge port, and then enters the pipeline crusher 3 through guide port 3. The crushing rotor 3.2 of the pipeline crusher 3 crushes and pulverizes the completely dried lithium salt material. The pulverized lithium salt material is then sent to the inlet of screw conveyor 4 through crushing conveyor pipe 3.1, and then conveyed to the dry... The intermediate hopper 5.2 of the dry granulator 5 allows the air between the powder particles to be extruded through the extrusion of the rollers 5.3. The pressure of the hydraulic system of the rollers is controlled to adjust the degree of extrusion. After the flaky material is discharged, it is cut by the rolling cutter 5.6. After being cut and crushed, it is sieved through a sieve with a certain mesh size. The powder is collected and re-granulated. Particles that meet the particle size are collected and filled. This improves the flowability of lithium salt solid products without affecting product quality, making filling and dispensing easier and improving production efficiency.

[0021] Example 2: A device for improving the solid flowability of lithium salt products mentioned in this utility model includes a support 1, a silo 2, a pipe crusher 3, a screw conveyor 4, a dry granulator 5, and a silo frame 6. The silo 2 and the silo frame 6 are installed on the upper part of the support 1. The pipe crusher 3 is installed at the lower end of the silo 2's discharge port. The discharge port of the pipe crusher 3 is connected to the inlet of the screw conveyor 4 via a pipeline. The discharge port of the screw conveyor 4 is connected to an intermediate hopper 5.2 via a conveying pipe 4.1. A conveyor belt 5.1 is provided below the intermediate hopper 5.2. The lithium salt product is conveyed to the rollers 5.3 of the dry granulator 5 via the conveyor belt 5.1. A first screening roller 5.4 is provided below the rollers 5.3. A lithium salt particle hopper 5.5 is installed below the first screening roller 5.4.

[0022] The difference from Example 1 is: Reference Figure 2 In this embodiment, a second screening roller 5.8 is installed on the lower side of the first screening mesh 5.7, and a second screening mesh 5.9 is installed on the lower side of the second screening roller 5.8. Moreover, the mesh size of the second screening mesh 5.9 is greater than that of the first screening mesh 5.7, which can improve the screening effect and produce higher quality lithium salt particles.

[0023] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An apparatus for improving the solid flowability of lithium salt products, characterized in that: The system includes a support frame (1), a hopper (2), a pipe crusher (3), a screw conveyor (4), a dry granulator (5), and a hopper frame (6). The hopper (2) and the hopper frame (6) are installed on the upper part of the support frame (1). The pipe crusher (3) is installed at the lower end of the hopper (2). The outlet of the pipe crusher (3) is connected to the inlet of the screw conveyor (4) through a pipeline. The outlet of the screw conveyor (4) is connected to the intermediate hopper (5.2) through a conveying pipe (4.1). A conveying belt (5.1) is provided below the intermediate hopper (5.2). The lithium salt product is conveyed to the rollers (5.3) of the dry granulator (5) through the conveying belt (5.1). A first screening roller (5.4) is provided below the rollers (5.3). A lithium salt granule hopper (5.5) is installed below the first screening roller (5.4).

2. The apparatus for improving the solid flowability of lithium salt products according to claim 1, characterized in that: A rolling cutter (5.6) is installed on the outer side of the roller (5.3).

3. The apparatus for improving the solid flowability of lithium salt products according to claim 2, characterized in that: The first screening screen (5.7) is provided on the lower side of the first screening drum (5.4).

4. The apparatus for improving the solid flowability of lithium salt products according to claim 3, characterized in that: A second screening drum (5.8) is installed on the lower side of the first screening screen (5.7), and a second screening screen (5.9) is installed on the lower side of the second screening drum (5.8).

5. The apparatus for improving the solid flowability of lithium salt products according to claim 4, characterized in that: The mesh count of the second screening screen (5.9) is greater than that of the first screening screen (5.7).

6. The apparatus for improving the solid flowability of lithium salt products according to claim 1, characterized in that: An exhaust cover (2.1) is installed on the upper part of the hopper (2), and an exhaust pipe (2.2) is installed on the upper part of the exhaust cover (2.1).

7. The apparatus for improving the solid flowability of lithium salt products according to claim 1, characterized in that: The pipeline crusher (3) includes a crushing conveying pipe (3.1), a crushing rotor (3.2), and a guide port (3.3). The crushing rotor (3.2) is installed inside the pipeline crusher (3). The guide port (3.3) is provided at the upper part of the pipeline crusher (3), and the crushing conveying pipe (3.1) is provided at the lower part. The lower end of the crushing conveying pipe (3.1) is located at the feed inlet of the screw conveyor (4).

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