Lithium carbonate size mixing system

Abstract

The lithium carbonate size mixing system comprises a size mixing tank, a stirring paddle arranged in the size mixing tank and a driving mechanism connected with the stirring paddle to drive the stirring paddle to rotate, a lower circulation opening is formed in the bottom of the size mixing tank, an emulsifying pump is arranged on the outer side of the size mixing tank, an inlet of the emulsifying pump is connected with the lower circulation opening through a feeding pipe, and an outlet of the emulsifying pump is connected with the lower circulation opening through a discharging pipe. And an outlet of the emulsification pump is connected with the size mixing tank through a discharge pipe so as to discharge the output material into the size mixing tank. According to the utility model, the particle size distribution range of slurry can be obviously narrowed, the carbonization reaction time is shortened, the carbon dioxide consumption is reduced, and the production efficiency is improved; and meanwhile, the risk of material blockage or material loss possibly caused by large particles generated by material agglomeration and precipitation in the industrial-grade lithium carbonate raw material mixing process is avoided, the quality difference generated in the material mixing process during different batches of production is eliminated, and the consistency of the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery-grade lithium carbonate manufacturing, in particular to a lithium carbonate slurry mixing system. Background Art

[0002] Lithium carbonate is a common lithium compound with a wide range of applications, such as lithium-ion batteries, glass ceramics, and coatings.

[0003] In industrial production, slurry mixing is the primary step in the entire battery-grade lithium carbonate production process, preparing the material for subsequent chemical reactions. Poor dispersion and uneven mixing during slurry mixing can lead to uneven product particle size distribution, impacting product quality. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a lithium carbonate slurry mixing system.

[0005] The present invention provides a lithium carbonate slurry mixing system, comprising: a slurry mixing tank, a stirring paddle arranged in the slurry mixing tank, and a driving mechanism connected to the stirring paddle to drive the stirring paddle to rotate, wherein:

[0006] A lower circulation port is provided at the bottom of the slurry mixing tank, and an emulsification pump is provided on the outside of the slurry mixing tank. The inlet of the emulsification pump is connected to the lower circulation port through a feed pipe, and the outlet of the emulsification pump is connected to the slurry mixing tank through a discharge pipe to discharge the output material into the slurry mixing tank.

[0007] Preferably, a circulation pump connected in series with the emulsification pump is provided in the feed pipe or the discharge pipe.

[0008] Preferably, the stirring paddle includes a stirring shaft and stirring blades installed on the stirring shaft, and a distribution plate is installed on the stirring shaft near the top of the slurry mixing tank; an upper circulation port is provided at the top of the slurry mixing tank and above the distribution plate, and the output end of the discharge pipe is connected to the upper circulation port.

[0009] Preferably, the distribution tray is an umbrella-shaped structure with its open end facing downward.

[0010] Preferably, a plurality of radially extending troughs are evenly distributed circumferentially on the distribution plate.

[0011] Preferably, the stirring paddle includes a stirring shaft and a stirring blade mounted on the stirring shaft, and a plurality of holes are provided on the stirring blade.

[0012] Preferably, a vertically arranged scraper is provided inside the slurry mixing tank, the scraper is fixedly connected to the stirring paddle through a connecting rod, and the side of the scraper away from the stirring paddle is in contact with the inner wall of the slurry mixing tank.

[0013] Preferably, the slurry mixing tank has a conical bottom structure, and its lower circulation port is located at the lowest end of its bottom.

[0014] In the present invention, a lower circulation port is provided at the bottom of the slurry mixing tank, an emulsification pump is provided on the outside of the slurry mixing tank, and the inlet of the emulsification pump is connected to the lower circulation port, and the outlet of the emulsification pump is connected to the slurry mixing tank so as to discharge the output material into the slurry mixing tank. After the material enters the tank, it is first stirred by a stirring paddle to make it evenly mixed, and then dispersed, sheared, and emulsified by an emulsification pump to turn large particles in the slurry into small particles, so that the particle size distribution range of the slurry is significantly narrowed, which can effectively shorten the carbonization reaction time, reduce the amount of carbon dioxide used, and improve production efficiency; at the same time, it avoids the risk of blockage or material loss caused by large particles generated by material agglomeration and precipitation in the industrial-grade lithium carbonate raw materials or mixing process. In addition, after the materials pass through the emulsification pump, the mixing effect between the materials is improved, eliminating the quality differences caused by the mixing process during different batches of production, which is conducive to ensuring the consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a lithium carbonate slurry mixing system proposed in the utility model. DETAILED DESCRIPTION

[0016] Reference Figure 1 The present invention provides a lithium carbonate slurry mixing system, comprising: a slurry mixing tank 1, a stirring paddle 2 disposed in the slurry mixing tank 1, and a driving mechanism 3 connected to the stirring paddle 2 to drive the stirring paddle 2 to rotate, wherein:

[0017] A lower circulation port is provided at the bottom of the slurry mixing tank 1, and an emulsification pump 4 is provided on the outside of the slurry mixing tank 1. The inlet of the emulsification pump 4 is connected to the lower circulation port through a feed pipe, and the outlet of the emulsification pump 4 is connected to the slurry mixing tank 1 through a discharge pipe to discharge the output material into the slurry mixing tank 1.

[0018] During operation, the material in the tank is stirred by the stirring paddle 2 arranged in the tank, while the material in the tank is sucked into the tank by the emulsification pump 4 arranged outside the tank. The emulsification pump 4 has an extremely high linear speed at the outer end of the high-speed rotating rotor, so that the material is ejected after strong impact, crushing, centrifugal extrusion, liquid layer friction, and strong shear between the rotor and stator gap. Under the action of multiple forces in different directions, strong turbulence is generated and finally discharged into the slurry mixing tank 1 through the outlet of the emulsification pump 4. After the material is dispersed, sheared, and emulsified by the emulsification pump 4, the large particles inside it become small particles, thereby significantly narrowing the particle size distribution range of the slurry. This can effectively shorten the carbonization reaction time, reduce the amount of carbon dioxide used, and improve production efficiency. At the same time, it avoids the risk of blockage or material loss caused by the agglomeration and precipitation of large particles of industrial-grade lithium carbonate raw materials or mixing processes. In addition, after the material passes through the emulsification pump 4, the mixing effect between the materials is improved, eliminating the quality differences caused by the mixing process during different batches of production, which is conducive to ensuring the consistency of product quality.

[0019] Furthermore, a circulation pump 5 connected in series with the emulsification pump 4 is provided in the feed pipe or the discharge pipe. When in operation, the circulation pump 5 pumps the material in the slurry mixing tank 1 out from the bottom, and then circulates it into the tank after being dispersed, sheared, and emulsified by the emulsification pump 4. The addition of the circulation pump 5 can make up for the insufficient circulation power of the emulsification pump 4, so that the circulation process is long enough to meet the circulation requirements of the large slurry mixing tank 1.

[0020] In this embodiment, the stirring paddle 2 includes a stirring shaft and stirring blades mounted thereon. A distribution tray 6 is mounted on the stirring shaft near the top of the mixing tank 1. An upper circulation port is provided at the top of the mixing tank 1, above the distribution tray 6. The output end of the discharge pipe is connected to the upper circulation port. The slurry flows through the upper circulation port onto the distribution tray 6. As the stirring shaft rotates, the slurry flowing onto the distribution tray 6 is dispersed around it by centrifugal force. This not only further improves the uniformity of the mixing, but also prevents increased local resistance of the stirring paddle 2, which could affect the smoothness of the stirring.

[0021] Furthermore, the material distribution plate 6 is an umbrella-shaped structure with its open end facing downwards. The material distribution plate 6 is evenly distributed with a plurality of radially extending material troughs circumferentially.

[0022] Furthermore, a plurality of holes are provided on the stirring blade of the stirring paddle 2 in this embodiment. During stirring, part of the slurry passes through the holes, so that the holes form a cut on the slurry, which can reduce resistance and enhance the slurry adjustment effect.

[0023] In addition, the present embodiment further provides a scraper 7 inside the slurry mixing tank 1. The scraper 7 is vertically arranged and fixedly connected to the stirring paddle 2 through a connecting rod. The side of the scraper 7 away from the stirring paddle 2 contacts the inner wall of the slurry mixing tank 1. During the stirring process, the scraper 7 scrapes the inner wall of the slurry mixing tank 1 to prevent some materials from adhering to the inner wall of the tank and not participating in the mixing, thereby causing the practical participation amount of the part of the material to be lower than the required amount of the proportion. At the same time, it can also prevent the problem of caking on the inner wall of the slurry mixing tank 1 and causing increased stirring resistance.

[0024] In this embodiment, the slurry mixing tank 1 has a conical bottom structure, and its lower circulation port is located at the lowest end of its bottom to facilitate the discharge of the slurry and prevent caking at the bottom of the tank.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium carbonate slurry mixing system, characterized in that: include: A slurry mixing tank (1), a stirring paddle (2) arranged in the slurry mixing tank (1), and a driving mechanism (3) connected to the stirring paddle (2) to drive the stirring paddle (2) to rotate, wherein: A lower circulation port is provided at the bottom of the slurry mixing tank (1), an emulsification pump (4) is provided on the outside of the slurry mixing tank (1), an inlet of the emulsification pump (4) is connected to the lower circulation port via a feed pipe, and an outlet of the emulsification pump (4) is connected to the slurry mixing tank (1) via a discharge pipe so as to discharge the output material into the slurry mixing tank (1); The stirring paddle (2) comprises a stirring shaft and a stirring blade mounted on the stirring shaft, and a material distribution plate (6) is mounted on the stirring shaft near the top of the slurry mixing tank (1); an upper circulation port is provided at the top of the slurry mixing tank (1) and above the material distribution plate (6), and the output end of the discharge pipe is connected to the upper circulation port.

2. The lithium carbonate slurry mixing system according to claim 1, characterized in that: A circulating pump (5) connected in series with the emulsification pump (4) is provided in the feed pipe or the discharge pipe.

3. The lithium carbonate slurry mixing system according to claim 1, characterized in that: The material distribution plate (6) is an umbrella-shaped structure, and its open end faces downward.

4. The lithium carbonate slurry mixing system according to claim 1, characterized in that: A plurality of radially extending troughs are evenly distributed on the circumference of the distribution plate (6).

5. The lithium carbonate slurry mixing system according to claim 1, characterized in that: The stirring paddle (2) comprises a stirring shaft and a stirring blade mounted on the stirring shaft, wherein a plurality of holes are provided on the stirring blade.

6. The lithium carbonate slurry mixing system according to claim 1, characterized in that: A vertically arranged scraper (7) is provided inside the slurry mixing tank (1). The scraper (7) is fixedly connected to the stirring paddle (2) via a connecting rod. The side of the scraper (7) away from the stirring paddle (2) contacts the inner wall of the slurry mixing tank (1).

7. The lithium carbonate slurry mixing system according to any one of claims 1 to 6, characterized in that: The slurry mixing tank (1) has a conical bottom structure, and its lower circulation port is located at the lowest end of its bottom.

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