Penetration-proof leaching solution pretreatment system

Abstract

The utility model relates to the technical field of industrial production of lithium energy materials, aims to solve the problem that the purity and the quality of products are affected due to the fact that more penetrating filter residues are contained in the leaching liquid of the existing midstream products for lithium batteries such as lithium carbonate or lithium hydroxide in the industrial production, and particularly discloses an anti-penetrating filter leaching liquid pretreatment system which comprises a storage tank group, a feeding pipe is arranged at the top of the storage tank group, a discharging pipe is arranged at the side bottom of the storage tank group, and the end part, far away from the storage tank group, of the discharging pipe is respectively communicated with the purification kettle and the size mixing tank through branch pipelines; the storage tank group comprises at least two leaching solution storage tanks, the side walls of the two leaching solution storage tanks are communicated with a communicating pipe, and a stirring mechanism is erected in an inner cavity of each leaching solution storage tank. The pretreatment system is adopted to treat the stored leaching solution, and then the leaching solution is conveyed to a purification process for subsequent processing, so that the silicon content in the purification solution can be effectively reduced, and the purity and quality of products such as lithium carbonate or lithium hydroxide can be improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium energy material industrial production technology, and more specifically, to a pretreatment system for leaching solution that prevents filter penetration. Background Technology

[0002] In the lithium energy industry, midstream products such as lithium carbonate and lithium hydroxide are key materials used in the production of lithium batteries, and the yield and quality of lithium carbonate and lithium hydroxide play a decisive role in the production and use of downstream lithium batteries. In industrial production, the mined lithium ore raw materials undergo pretreatment, and then lithium carbonate or lithium hydroxide is produced mainly through steps such as leaching, pressure filtration, purification, and drying.

[0003] For example, patent CN221822283U provides a leaching solution treatment system and a lithium carbonate production system, which sequentially includes an evaporation crystallization device, a filtration device, a pressure filtration device, and a calcium removal device. It effectively removes potassium and calcium elements through evaporation crystallization, filtration, and calcium removal, effectively solving the technical problem in existing technologies where potassium removal after lithium precipitation leads to substandard potassium content in lithium carbonate products, thus improving the quality and purity of lithium carbonate products after lithium precipitation. In current processes, the leaching solution stored in the tank is directly transported to the purification process according to the specified quantity and speed. However, in actual industrial production, it has been found that solid particles that are not effectively intercepted during the pressure filtration process penetrate the filter medium and enter subsequent processes. These solid particles mix into the leaching solution, forming filter-penetrating residue, which mainly consists of silicon compounds, metal hydroxides, and calcium and magnesium salt residues. The residual filter-penetrating residue in the leaching solution is difficult to fully separate and remove in existing treatment processes, resulting in a high content of filter-penetrating residue in the leaching solution flowing to the purification process, affecting the purity and quality of the purified solution, specifically manifested as excessively high silicon content.

[0004] Therefore, there is an urgent need for a treatment system that can effectively prevent filter residue from entering subsequent processes such as purification along with the leachate. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the leaching solution for lithium batteries, such as lithium carbonate or lithium hydroxide, contains excessive filter-penetrating residue, which affects the purity and quality of the products. This application provides a filter-penetrating leaching solution pretreatment system. Using this pretreatment system to treat the stored leaching solution before it is transported to the purification process for further processing, it can effectively reduce the silicon content in the purified solution and improve the purity and quality of lithium carbonate and other produced products.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model provides a pretreatment system for leaching solution that prevents filter penetration, including a storage tank group. The top of the storage tank group is equipped with a feeding pipe, and the bottom side of the storage tank group is equipped with a discharging pipe. The discharge end of the discharging pipe is connected to a purification tank and a slurry preparation tank through different pipes. The storage tank group includes at least two leaching solution storage tanks, and the side walls of two adjacent leaching solution storage tanks are connected by a connecting pipe. Materials are alternately transported to the purification process through multiple leaching solution storage tanks, and the leaching solution storage tanks that are not in operation can be descaled by sedimentation. The inner cavity of the leaching solution storage tank is equipped with a stirring mechanism, which can clean the sediment in the leaching solution storage tank in a timely manner.

[0008] Preferably, each of the leachate storage tanks is provided with a feed branch pipe at its top, and the end of the feed branch pipe away from the leachate storage tank is connected to the discharge end of the feed pipe.

[0009] Preferably, a discharge branch pipe is provided at the bottom side of the leachate storage tank, and the end of the discharge branch pipe away from the leachate storage tank is connected to the inlet end of the feed pipe, and the discharge branch pipe is located on the side of the leachate storage tank away from the feed branch pipe.

[0010] Preferably, a regulating valve is installed on the discharge branch pipe near the discharge port of the leachate storage tank.

[0011] Preferably, a one-way valve is provided in the middle section of the connecting pipe.

[0012] Preferably, a conveying pump is provided at the end of the feed pipe away from the leachate storage tank, and two feed branch pipes are provided at the discharge end of the conveying pump, and the two feed branch pipes are respectively connected to the purification kettle and the slurry mixing tank.

[0013] Preferably, the stirring mechanism is mounted on the bottom of the leachate storage tank, and the stirring mechanism includes a shaft arranged in a vertical direction and a plurality of spiral stirring blades disposed on the side wall of the shaft, and the shaft is rotatably connected to the bottom of the leachate storage tank.

[0014] Preferably, a rotating motor is disposed at the bottom of the shaft, and the end of the shaft is detachably connected to the through shaft of the rotating motor, wherein the rotating motor is embedded in the bottom of the leachate storage tank.

[0015] The technical solution of this utility model has the following beneficial effects:

[0016] This utility model discloses a pretreatment system for leaching solution that prevents filter penetration. The system treats the stored leaching solution before transporting it to the purification process for further processing. Multiple leaching solution storage tanks alternately supply materials to the purification process, while leaching solution storage tanks that are not in operation can be descaled to reduce the amount of filter-penetrating residue entering the purification vessel. This effectively reduces the silicon content in the purification solution and improves the purity and quality of products such as lithium carbonate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pretreatment system for the leaching solution to prevent filtration perforation in Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the leachate storage tank in Example 1;

[0019] Figure 3 This is a cross-sectional view of the leachate storage tank in Example 1.

[0020] Attached reference numerals: 1-Leachate storage tank, 11-Feeding pipe, 111-Infeed branch pipe, 12-Discharge pipe, 121-Outlet branch pipe, 122-Regulating valve, 13-Connecting pipe, 131-Check valve, 14-Transfer pump, 141-Feeding branch pipe, 2-Purification vessel, 3-Slurry mixing tank, 41-Shaft, 42-Spiral stirring blade, 43-Rotating motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Where specific conditions are not specified in the embodiments, they are performed according to conventional conditions or conditions recommended by the manufacturer; where the manufacturers of instruments, equipment, reagents, or raw materials are not specified, they are all conventional products that can be purchased commercially. The following are specific embodiments in conjunction with the accompanying drawings.

[0022] like Figures 1 to 3 As shown, this embodiment provides a pretreatment system for leaching solution that prevents filter penetration, including a storage tank group. The top of the storage tank group is equipped with a feed pipe 11, and the bottom side of the storage tank group is equipped with a discharge pipe 12. The discharge end of the discharge pipe 12 is connected to the purification tank 2 and the slurry tank 3 through different pipes respectively. The storage tank group includes at least two leaching solution storage tanks 1, and the side walls of two adjacent leaching solution storage tanks 1 are connected by a connecting pipe 13. A one-way valve 131 is configured in the middle section of the connecting pipe 13.

[0023] In this embodiment, a feed branch pipe 111 is provided at the top of each leaching solution storage tank 1, and the end of the feed branch pipe 111 away from the leaching solution storage tank 1 is connected to the discharge end of the feed pipe 11. A discharge branch pipe 121 is provided at the bottom side of the leaching solution storage tank 1, and the end of the discharge branch pipe 121 away from the leaching solution storage tank 1 is connected to the feed end of the discharge pipe 12. The discharge branch pipe 121 is located on the side of the leaching solution storage tank 1 away from the feed branch pipe 111. A regulating valve 122 is provided at the position of the discharge branch pipe 121 near the discharge port of the leaching solution storage tank 1.

[0024] In this embodiment, a conveying pump 14 is provided at the end of the feed pipe 12 away from the leachate storage tank 1. The discharge end of the conveying pump 14 is provided with two feed branch pipes 141, and the two feed branch pipes 141 are respectively connected to the purification tank 2 and the slurry tank 3.

[0025] In this embodiment, the inner cavity of the leachate storage tank 1 is equipped with a stirring mechanism, which is mounted on the bottom of the leachate storage tank 1. The stirring mechanism includes a shaft 41 arranged in a vertical direction and a plurality of spiral stirring blades 42 disposed on the side wall of the shaft 41. The shaft 41 is rotatably connected to the bottom of the leachate storage tank 1. A rotating motor 43 is disposed at the bottom of the shaft 41, and the end of the shaft 41 is detachably connected to the through shaft of the rotating motor 43. The rotating motor 43 is embedded in the bottom of the leachate storage tank 1.

[0026] The leaching solution pretreatment system of this embodiment pretreats the stored leaching solution before it is transported to the purification process for further processing. Multiple leaching solution storage tanks 1 alternately transport materials to the purification process, while the leaching solution storage tanks 1 that are not in operation can be descaled by sedimentation, which can reduce the amount of filter-penetrating residue entering the purification kettle 2, effectively reduce the silicon content in the purification solution, and improve the purity and quality of products such as lithium carbonate.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pretreatment system for leaching solution to prevent filtration perforation, characterized in that, The system includes a storage tank assembly, with a feeding pipe (11) at the top and a discharging pipe (12) at the bottom side. The discharge end of the discharging pipe (12) is connected to the purification tank (2) and the slurry mixing tank (3) through different pipes. The storage tank group includes at least two leachate storage tanks (1), and the side walls of two adjacent leachate storage tanks (1) are connected by a connecting pipe (13). The inner cavity of the leachate storage tank (1) is equipped with a stirring mechanism.

2. The pretreatment system for leaching solution to prevent filtration perforation according to claim 1, characterized in that, Each of the leaching solution storage tanks (1) is provided with a feed branch pipe (111) at the top. The end of the feed branch pipe (111) away from the leaching solution storage tank (1) is connected to the discharge end of the feed pipe (11).

3. The pretreatment system for leaching solution to prevent filtration perforation according to claim 2, characterized in that, The bottom side of the leachate storage tank (1) is provided with a discharge branch pipe (121). The end of the discharge branch pipe (121) away from the leachate storage tank (1) is connected to the feed end of the feed pipe (12), and the discharge branch pipe (121) is located on the side of the leachate storage tank (1) away from the feed branch pipe (111).

4. The pretreatment system for leaching solution to prevent filtration perforation according to claim 3, characterized in that, A regulating valve (122) is installed on the discharge branch pipe (121) near the discharge port of the leachate storage tank (1).

5. The pretreatment system for leaching solution to prevent filtration perforation according to claim 1, characterized in that, A one-way valve (131) is provided in the middle section of the connecting pipe (13).

6. The pretreatment system for leaching solution to prevent filtration perforation according to claim 1, characterized in that, The end of the feed pipe (12) away from the leachate storage tank (1) is equipped with a delivery pump (14). The discharge end of the delivery pump (14) is equipped with two feed branch pipes (141), and the two feed branch pipes (141) are respectively connected to the purification kettle (2) and the slurry tank (3).

7. The pretreatment system for leaching solution to prevent filtration perforation according to any one of claims 1 to 6, characterized in that, The stirring mechanism is mounted on the bottom of the leachate storage tank (1), and the stirring mechanism includes a shaft (41) arranged in a vertical direction and a plurality of spiral stirring blades (42) disposed on the side wall of the shaft (41). The shaft (41) is rotatably connected to the bottom of the leachate storage tank (1).

8. The pretreatment system for leaching solution to prevent filtration perforation according to claim 7, characterized in that, A rotating motor (43) is disposed at the bottom of the shaft (41), and the end of the shaft (41) is detachably connected to the through shaft of the rotating motor (43). The rotating motor (43) is embedded in the bottom of the leachate storage tank (1).

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