Mixing device for preparing high-purity lithium carbonate
Through the improved stirring and diffusion components and driving components, the problems of insufficient mixing and uneven diffusion of carbon dioxide in the lithium carbonate mixing device were solved, and the efficient generation of lithium bicarbonate solution was achieved.
Patent Information
- Application Number
- CN202422749356.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Existing lithium carbonate mixing devices have problems such as industrial-grade lithium carbonate depositing at the bottom of the mixing tank and insufficient mixing, and carbon dioxide gas cannot diffuse evenly and quickly, resulting in low efficiency in generating lithium bicarbonate solution.
A stirring and diffusion assembly is used, including a rotating tube, an upper stirring tube and a lower stirring rod. The rotating tube is driven by a driving assembly to achieve sufficient mixing of industrial-grade lithium carbonate and mother liquor, and the carbon dioxide is evenly and quickly diffused into the lithium carbonate slurry through the diffusion holes of the upper stirring tube and the stirring teeth of the lower stirring rod.
The generation rate of lithium bicarbonate solution is improved, the full mixing of lithium carbonate and mother liquor and the uniform diffusion of carbon dioxide are ensured, and the generation efficiency is improved.
Smart Images
Figure CN223381424U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial high-purity lithium carbonate preparation, in particular to a mixing device for preparing high-purity lithium carbonate. Background Art
[0002] The lithium carbonate carbonization process for producing high-purity lithium carbonate involves mixing industrial-grade lithium carbonate with an appropriate amount of mother liquor (a solution containing a certain amount of lithium carbonate or other lithium compounds) to form a lithium carbonate slurry. Carbon dioxide gas is then introduced into the prepared lithium carbonate slurry to initiate a carbonization reaction (lithium carbonate and carbon dioxide react to form a soluble lithium bicarbonate solution). The resulting lithium bicarbonate solution contains some insoluble impurities and suspended matter. These impurities and suspended matter can be removed by coarse filtration to obtain a relatively pure lithium bicarbonate solution. The solution is then refined with resin for fine impurity removal. The refined lithium bicarbonate solution is then heated and decomposed to obtain a high-quality lithium carbonate slurry. The resulting lithium carbonate slurry is then centrifuged to remove excess water and impurities. The centrifuged lithium carbonate is then dried to obtain the final high-purity lithium carbonate product.
[0003] This process is short, low-cost and has good product quality. In the process of preparing high-purity lithium carbonate by lithium carbonate carbonization, a mixing device is required to mix industrial-grade lithium carbonate with mother liquor to form lithium carbonate slurry.
[0004] There is a related lithium carbonate mixing device, which includes several parts such as a mixing tank, a stirring part and a driving part. The mixing tank is a place for mixing, and is provided with a feed port, a discharge port and an air inlet. Carbon dioxide enters the mixing tank through the air inlet to contact and react with the mixed material; the stirring part is arranged in the mixing tank, and the driving part is arranged outside the mixing tank. The driving part drives the stirring part to stir the mixed material.
[0005] However, in actual applications, it was found that when industrial-grade lithium carbonate was added to the mixing tank, industrial-grade lithium carbonate was deposited at the bottom of the mixing tank, and the stirring part in the existing lithium carbonate mixing device could not better mix the sediment deposited at the bottom of the mixing tank with the mother liquor during the stirring process, resulting in insufficient mixing; furthermore, the method of directly filling the mixing tank with carbon dioxide through the air inlet could not make the carbon dioxide gas diffuse more evenly and quickly into the lithium carbonate slurry. The combination of the above two situations resulted in a low efficiency in generating lithium bicarbonate solution. Utility Model Content
[0006] The purpose of the utility model is to provide a mixing device for preparing high-purity lithium carbonate, so as to solve the problems raised in the above background technology.
[0007] The technical solution adopted in this utility model is:
[0008] A mixing device for preparing high-purity lithium carbonate, comprising:
[0009] The mixing body has a cavity therein, a feed port is opened on the top, and a discharge port is opened on the bottom;
[0010] A stirring and diffusion component is provided on the mixing body, one end of which is rotatably connected to a high-pressure pipe of carbon dioxide;
[0011] A driving assembly, disposed on the mixing body, and providing kinetic energy to the stirring and diffusion assembly;
[0012] in,
[0013] The stirring and diffusion assembly comprises:
[0014] a rotating tube rotatably disposed in the mixing body, one end of which is rotatably connected to the high-pressure pipe of carbon dioxide, and the other end of which extends from one end to the other end of the mixing body;
[0015] an upper stirring tube, fixedly mounted on the rotating tube, one end of which is in communication with the rotating tube, and a diffusion hole is provided on the upper stirring tube;
[0016] The lower stirring rod is fixedly arranged on the rotating tube, and one end of the lower stirring rod is communicated with the rotating tube. The lower stirring rod is provided with hollow stirring teeth with openings at the top and the bottom.
[0017] Optionally, there are multiple upper stirring tubes, which are staggered and arranged from top to bottom, and each upper stirring tube extends along the radial direction of the rotating tube to the inner wall of the mixing body.
[0018] Optionally, there are multiple stirring teeth, which are distributed at intervals on the lower stirring rod, and the stirring teeth do not contact the wall of the mixing body.
[0019] Optionally, the shape of the lower stirring rod is adapted to the shape of the bottom of the mixing body.
[0020] Optionally, the driving component includes:
[0021] A motor is provided on the mixing body;
[0022] A driving gear, fixedly sleeved on the output shaft of the motor;
[0023] The driven gear is fixedly sleeved on the rotating tube and meshes with the driving gear.
[0024] Optionally, the drive assembly further includes a circuit control device, and the circuit control device is electrically connected to the motor.
[0025] Optionally, the circuit control device includes:
[0026] Power supply module, used to provide operating voltage for each module;
[0027] A time detection module, used for detecting the motor driving time;
[0028] A motor drive module, used to drive the motor in forward and reverse rotation;
[0029] The microprocessor control unit is used to control the working state of the motor drive module.
[0030] Optionally, a feeding hopper with a certain height is provided at the feed inlet.
[0031] Optionally, a scraper is further included, which is arranged on the end surface of the upper stirring tube adjacent to the inner wall of the mixing body.
[0032] Compared with the prior art, the beneficial effects of the present invention are:
[0033] In the utility model, the mixing material at the bottom of the mixing body is stirred by the stirring teeth on the lower stirring rod, thereby preventing industrial-grade lithium carbonate from being deposited on the bottom wall of the mixing body; the mixing material at the top of the mixing body is stirred by the upper stirring tube, and the industrial-grade lithium carbonate and the mother liquor are fully mixed with each other under the mutual cooperation of the upper stirring tube and the lower stirring rod, and then the carbon dioxide is evenly and quickly diffused into the lithium carbonate slurry through the multiple diffusion holes opened on the upper stirring tube and the multiple stirring teeth provided on the lower stirring rod, thereby improving the generation rate of the lithium bicarbonate solution. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0035] Figure 1 This is a schematic diagram of the overall structure of the mixing device of this application;
[0036] Figure 2 This is a schematic diagram of the circuit control device structure of this application;
[0037] Figure 3 This is a flow chart of the circuit control method of this application.
[0038] Reference numerals:
[0039] 1. Mixing body; 2. Feeding hopper; 3. Discharge pipe; 31. Electric material valve;
[0040] 4. Stirring and diffusion assembly; 41. Rotating tube; 42. Upper stirring tube; 421. Diffusion hole; 43. Lower stirring rod; 431. Stirring teeth;
[0041] 51. Motor; 52. Driving gear; 53. Driven gear; 54. Power supply module; 55. Time detection module; 56. Microprocessor control unit; 57. Motor drive module;
[0042] 6. High-pressure pipeline. DETAILED DESCRIPTION
[0043] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.
[0044] In order to solve the problem that the efficiency of generating lithium bicarbonate solution is low due to insufficient mixing of the mixed materials by the existing mixing device and the inability of carbon dioxide gas to diffuse into the lithium carbonate slurry more evenly and quickly.
[0045] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0046] Combine Figure 1-Figure 3 As shown, an embodiment of the present invention provides a mixing device for preparing high-purity lithium carbonate, comprising: a mixing body 1, a feeding hopper 2, a discharge pipe 3, a stirring and diffusion component 4 and a driving component.
[0047] Among them, the mixing body 1 is a tank body with a hollow structure inside, with a feed port on it and a discharge port below it. The mixing body 1 is configured as the main place for mixing. The feeding hopper 2 is arranged on the feed port and is configured as the main channel for industrial-grade lithium carbonate and mother liquor to enter the interior of the mixing body 1. The discharge pipe 3 is arranged on the discharge port, and an electric valve 31 is provided on it, and the material is taken through the discharge pipe 3. The stirring and diffusion component 4 is arranged inside the mixing body 1, and one end of it is rotatably connected to the high-pressure pipeline 6 of carbon dioxide. The stirring and diffusion component 4 is configured to mix industrial-grade lithium carbonate and mother liquor and diffuse carbon dioxide gas into the lithium carbonate slurry. The driving component is arranged on the mixing body 1 and is configured to provide kinetic energy for the stirring and diffusion component 4.
[0048] Specifically, if Figure 1 As shown, the feeding hopper 2 is arranged through the top of the mixing body 1. In order to prevent the lithium carbonate slurry in the mixing body 1 from overflowing from the feeding hopper 2 during the mixing process, the feeding hopper 2 can be set to a feeding hopper 2 with a certain height, and the specific height can be adjusted according to the actual application scenario.
[0049] The stirring and diffusion assembly 4 includes a rotating tube 41 , an upper stirring tube 42 and a lower stirring rod 43 .
[0050] The rotating tube 41 is rotatably disposed within the mixing body 1. Its upper portion is open, its interior is hollow, and its lower portion is closed. The upper portion of the rotating tube 41 is located above the top of the mixing body 1, i.e., outside the mixing body 1, and is rotatably connected to the high-pressure carbon dioxide pipe 6. The lower portion is located within the mixing body 1, extending from the top to near the bottom of the mixing body 1. The rotating tube 41 is configured as the primary passage for carbon dioxide to enter the mixing body 1 from the outside. In a preferred embodiment, the rotating tube 41 is rotatably disposed on the central axis of the mixing body 1.
[0051] The upper stirring tube 42 is fixedly disposed radially of the rotating tube 41. The upper stirring tube 42 has a hollow interior and one end communicates with the interior of the rotating tube 41. The upper stirring tube 42 is provided with a plurality of evenly spaced diffusion holes 421 for carbon dioxide to pass through. Carbon dioxide enters the upper stirring tube 42 through the rotating tube 41 and is then distributed within the mixing body 1 through the diffusion holes 421 in the upper stirring tube 42. In a preferred embodiment, there are multiple upper stirring tubes 42, which are staggered from top to bottom, and each upper stirring tube 42 extends radially along the rotating tube 41 to the inner wall of the mixing body 1.
[0052] The lower stirring rod 43 is fixedly arranged at a position near the bottom of the rotating tube 41. The interior of the lower stirring rod 43 is a hollow structure and one end is connected to the interior of the rotating tube 41. The shape of the lower stirring rod 43 is adapted to the bottom shape of the mixing body 1. The lower end of the lower stirring rod 43 is evenly and fixedly provided with a plurality of hollow stirring teeth 431 with openings on the top and bottom, and the stirring teeth 431 do not contact the bottom of the mixing body 1. Carbon dioxide enters the lower stirring rod 43 through the rotating tube 41, and then diffuses into the interior of the mixing body 1 through the stirring teeth 431 on the lower stirring rod 43. In this embodiment, in addition to serving as a channel for carbon dioxide to enter the interior of the mixing body 1 as described above, the stirring teeth 431 can also serve to break up the sediment deposited on the bottom wall of the mixing body 1 so that the lithium carbonate slurry is mixed more fully. As a preferred embodiment, there are two lower stirring rods 43, which are respectively arranged on both sides of the rotating tube 41.
[0053] The driving assembly includes a motor 51 , a driving gear 52 and a driven gear 53 .
[0054] The motor 51 is fixedly arranged on the mixing body 1 , specifically, fixedly arranged at the top position of the mixing body 1 .
[0055] The driving gear 52 is fixedly sleeved on the output shaft of the motor 51 .
[0056] The driven gear 53 is fixedly sleeved on the rotating tube 41 , specifically sleeved at a position near the top of the rotating tube 41 , and the driven gear 53 is meshed with the driving gear 52 .
[0057] Start the motor 51, the output shaft of the motor 51 drives the driving gear 52 to rotate, the driving gear 52 drives the driven gear 53 to rotate synchronously, the driven gear 53 drives the rotating tube 41 to rotate synchronously, and the rotating tube 41 drives the upper stirring tube 42 and the lower stirring rod 43 to rotate synchronously.
[0058] During use, industrial-grade lithium carbonate and mother liquor are put into the mixing body 1 along the feeding hopper 2, and the motor 51 is started. The motor 51 drives the rotating tube 41 to rotate through the driving gear 52 and the driven gear 53. The rotating tube 41 drives the upper stirring tube 42 and the lower stirring rod 43 to rotate synchronously. The industrial-grade lithium carbonate and the mother liquor are mixed through multiple upper stirring tubes 42 and multiple lower stirring rods 43 to form a lithium carbonate slurry; the multiple stirring teeth 431 can effectively prevent the industrial-grade lithium carbonate from adhering to the bottom wall of the mixing body 1 to form sediment; and the cooperation of the upper stirring tube 42 and the lower stirring rod 43 can achieve a better mixing effect. After the mixing is completed, the high-pressure pipe 6 of carbon dioxide is opened, and the carbon dioxide is evenly and quickly injected into the lithium carbonate slurry in the mixing body 1 along the rotating tube 41, multiple upper stirring tubes 42 and multiple lower stirring rods 43. The carbon dioxide is fully contacted and mixed with the lithium carbonate slurry under the rotation of the multiple upper stirring tubes 42 and multiple lower stirring rods 43, thereby more efficiently generating a lithium bicarbonate solution. After completion, the motor 51 is turned off, the electric material valve 31 is opened, and the generated lithium bicarbonate solution is taken out through the discharge pipe 3 to proceed to the next step. In this embodiment, the filling of carbon dioxide can be carried out synchronously with the rotating upper stirring tube 42 and lower stirring rod 43, or the carbon dioxide can be filled first, then the high-pressure pipe 6 is closed, and then the upper stirring tube 42 and lower stirring rod 43 are rotated.
[0059] In summary, in the utility model disclosed herein, the mixing material at the bottom of the mixing body 1 is stirred by the stirring teeth 431 on the lower stirring rod 43, and the mixing material at the top of the mixing body 1 is stirred by the upper stirring tube 42. The upper stirring tube 42 and the lower stirring rod 43 cooperate with each other to achieve sufficient mixing of industrial-grade lithium carbonate and mother liquor. Then, the carbon dioxide is evenly and quickly diffused into the lithium carbonate slurry through the multiple diffusion holes 421 provided on the upper stirring tube 42 and the multiple stirring teeth 431 provided on the lower stirring rod 43, thereby increasing the generation rate of the lithium bicarbonate solution.
[0060] Furthermore, in order to facilitate cleaning of the inner wall of the mixing body, a scraper (not shown) can be provided on the end surface of the upper stirring tube 42 adjacent to the inner wall of the mixing body 1. Preferably, the scraper can be made of a soft elastic material.
[0061] As a further improvement of the above embodiment, the driving assembly may further include a circuit control device electrically connected to the motor 51 , and the circuit control device controls the stirring and diffusion assembly 4 to move in a periodic rotation manner through the motor 51 .
[0062] like Figure 2 As shown, the circuit control device includes: a power supply module 54, a time detection module 55, a microprocessor control unit 56, and a motor drive module 57. The power supply module 54 is configured to provide operating voltage to each module; the time detection module 55 is configured to detect the driving time of the motor 51; the microprocessor control unit 56 is configured to control the working state of the motor drive module 57; and the motor drive module 57 is configured to drive the forward and reverse rotation of the motor 51.
[0063] When the circuit control device is working, the microprocessor control unit 56 sends a forward rotation signal to the motor drive module 57, and the motor 51 runs forward to drive the stirring and diffusion component 4 to rotate forward; the time detection module 55 detects the forward rotation time of the motor 51, and when the forward rotation time is A seconds, it sends a time-out signal to the microprocessor control unit 56; the microprocessor control unit 56 sends a stop signal to the motor drive module 57; the time detection module 55 detects the stop time of the motor 51, and when the stop time is B seconds, it sends a time-out signal to the microprocessor control unit 56; the microprocessor control unit 56 A reverse operation signal is sent to the motor drive module 57, and the motor 51 reverses to further mix the mixed materials; the time detection module 55 detects the reverse time of the motor 51, and when the reverse time is C seconds, a time-out signal is sent to the microprocessor control unit 56; the microprocessor control unit 56 sends a stop signal to the motor drive module 57; the time detection module 55 detects the stop time of the motor 51, and when the stop time is D seconds, the microprocessor control unit 56 again sends a forward rotation signal to the motor drive module 57; repeat the above process, and after the mixing cycle is N times, the program is completed (for specific steps, see Figure 3 ). Among them, the forward and reverse time, stop time and number of cycles can be set differently.
[0064] During the above process, at the moment when the upper stirring tube 42 and the lower stirring rod 43 change their rotation direction, part of the mixed materials do not have time to change their movement direction due to inertia, and thus move in the opposite direction of the upper stirring tube 42 and the lower stirring rod 43 that have changed their direction, causing the mixed materials to be collided and mixed more fully.
[0065] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A mixing device for preparing high-purity lithium carbonate, characterized in that: include: A mixing body having a cavity therein, a feed port being provided on the upper side thereof and a discharge port being provided on the lower side thereof; a stirring and diffusion component being arranged on the mixing body, one end of which is rotatably connected to a high-pressure pipe of carbon dioxide; a driving component being arranged on the mixing body to provide kinetic energy for the stirring and diffusion component; wherein the stirring and diffusion component comprises: a rotating tube being rotatably arranged in the mixing body, one end of which is rotatably connected to the high-pressure pipe of carbon dioxide, and the other end extending from one end to the other end of the mixing body; an upper stirring tube being fixedly arranged on the rotating tube, one end of which is connected to the rotating tube, and a diffusion hole being provided on the upper stirring tube; a lower stirring rod being fixedly arranged on the rotating tube, one end of which is connected to the rotating tube, and a hollow stirring tooth with openings at the upper and lower ends being provided through the lower stirring rod.
2. The mixing device for preparing high-purity lithium carbonate according to claim 1, wherein There are multiple upper stirring tubes, which are staggered and arranged from top to bottom. Each upper stirring tube extends along the radial direction of the rotating tube to the inner side wall of the mixing body.
3. The mixing device for preparing high-purity lithium carbonate according to claim 1, wherein There are multiple stirring teeth, which are distributed at intervals on the lower stirring rod, and the stirring teeth do not contact the wall of the mixing body.
4. The mixing device for preparing high-purity lithium carbonate according to claim 1, wherein The shape of the lower stirring rod is adapted to the shape of the bottom of the mixing body.
5. The mixing device for preparing high-purity lithium carbonate according to claim 1, characterized in that, The driving assembly includes: a motor, which is arranged on the mixing body; a driving gear, which is fixedly sleeved on the output shaft of the motor; and a driven gear, which is fixedly sleeved on the rotating tube and meshes with the driving gear.
6. The mixing device for preparing high-purity lithium carbonate according to claim 5, characterized in that The driving assembly further includes a circuit control device electrically connected to the motor.
7. The mixing device for preparing high-purity lithium carbonate according to claim 6, characterized in that The circuit control device includes: a power supply module for providing working voltage for each module; a time detection module for detecting the motor driving time; a motor driving module for driving the forward and reverse rotation of the motor; and a microprocessor control unit for controlling the working state of the motor driving module.
8. The mixing device for preparing high-purity lithium carbonate according to claim 1, characterized in that A feeding hopper with a certain height is provided at the feeding port.
9. The mixing device for preparing high-purity lithium carbonate according to claim 1, characterized in that, It also includes a scraper, which is arranged on the end surface of the upper stirring tube adjacent to the inner wall of the mixing body.