CN223381424U - A mixing device for preparing high-purity lithium carbonate - Google Patents

Abstract

The utility model relates to the technical field of industrial high-purity lithium carbonate preparation, and in particular to a mixing device for preparing high-purity lithium carbonate, comprising: a mixing body having a cavity therein, a feed port provided on the upper side thereof, and a discharge port provided below the lower side thereof; a stirring and diffusion assembly arranged on the mixing body, one end of which is rotatably connected to a high-pressure pipe of carbon dioxide; a driving assembly arranged on the mixing body to provide kinetic energy for the stirring and diffusion assembly; stirring the mixing material below the mixing body by stirring teeth on a lower stirring rod, stirring the mixing material above the mixing body by an upper stirring tube, and achieving sufficient mixing of industrial-grade lithium carbonate and mother liquor under the mutual cooperation of the upper stirring tube and the lower stirring rod. Then, the carbon dioxide is uniformly and rapidly diffused into the lithium carbonate slurry through a plurality of diffusion holes provided on the upper stirring tube and a plurality of stirring teeth provided on the lower stirring rod, thereby improving the generation rate of the lithium bicarbonate solution.

Description

A compounding device for preparing high-purity lithium carbonate

Technical Field

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

The process for preparing high-purity lithium carbonate by a lithium carbonate carbonization method comprises the steps of mixing industrial grade lithium carbonate with a proper amount of mother solution (solution containing a certain amount of lithium carbonate or other lithium compounds) to prepare lithium carbonate slurry, introducing carbon dioxide gas into the prepared lithium carbonate slurry, performing carbonization reaction (the lithium carbonate reacts with the carbon dioxide to generate soluble lithium bicarbonate solution), wherein the obtained lithium bicarbonate solution contains some insoluble impurities and suspended matters, removing the impurities and the suspended matters from the solution by filtering coarse impurities, obtaining purer lithium bicarbonate solution, removing impurities by resin, heating and decomposing the refined lithium bicarbonate solution after the fine impurities to obtain high-quality lithium carbonate slurry, and centrifuging the obtained lithium carbonate slurry to remove redundant moisture and impurities. And then, drying the centrifugally separated lithium carbonate to obtain a final high-purity lithium carbonate product.

The process has short flow, low cost and good product quality. In the process of preparing high-purity lithium carbonate by a lithium carbonate carbonization method, a mixing device is required to be used for mixing industrial grade lithium carbonate with a mother solution, so that lithium carbonate slurry is formed.

The prior related lithium carbonate mixing device comprises a mixing tank, a stirring part, a driving part and the like, wherein the mixing tank is a place for mixing, a feed inlet, a discharge outlet and an air inlet are formed in the mixing tank, carbon dioxide enters the mixing tank through the air inlet to be in contact with and react with a mixture, the stirring part is arranged in the mixing tank, the driving part is arranged outside the mixing tank, and the driving part drives the stirring part to stir the mixture.

However, in practical application, it is found that the industrial grade lithium carbonate is deposited at the bottom of the mixing tank when being put into the mixing tank, but the stirring part in the existing lithium carbonate mixing device can not better mix the deposited at the bottom of the mixing tank with the mother liquor in the stirring process, so that the mixing is insufficient, and furthermore, the mode of directly filling carbon dioxide into the mixing tank through the air inlet can not lead the carbon dioxide gas to be uniformly and rapidly diffused into the lithium carbonate slurry, so that the efficiency of generating the lithium bicarbonate solution is lower due to the combination of the two conditions.

Disclosure of utility model

The utility model aims to provide a mixing device for preparing high-purity lithium carbonate, which is used for solving the problems in the background technology.

The technical scheme adopted by the utility model is as follows:

A mixing device for preparing high purity lithium carbonate, comprising:

the mixing main body is internally provided with a cavity, a feed inlet is formed in the mixing main body, and a discharge outlet is formed below the mixing main body;

the stirring diffusion assembly is arranged on the mixing main body, and one end of the stirring diffusion assembly is rotatably communicated with the high-pressure pipeline of the carbon dioxide;

The driving assembly is arranged on the mixing main body and provides kinetic energy for the stirring and diffusing assembly;

Wherein, the

The stirring diffusion assembly includes:

The rotating pipe is rotatably arranged in the mixing main body, one end of the rotating pipe is rotatably communicated with the high-pressure pipeline of the carbon dioxide, and the other end of the rotating pipe extends from one end of the mixing main body to the other end of the rotating pipe;

The upper stirring pipe is fixedly arranged on the rotating pipe, one end of the upper stirring pipe is communicated with the rotating pipe, and diffusion holes are formed in the upper stirring pipe;

the lower stirring rod is fixedly arranged on the rotating pipe, one end of the lower stirring rod is communicated with the rotating pipe, and hollow stirring teeth with openings are arranged on the lower stirring rod in a penetrating manner.

Optionally, the quantity of going up the agitator tube is many, from last to down staggered arrangement in proper order, every go up the agitator tube along the radial extension of rotor tube is close to the compounding main part inside wall.

Optionally, the quantity of stirring tooth is a plurality of, and the interval distributes on the lower puddler, just stirring tooth with the compounding main part wall does not contact.

Optionally, the shape of the lower stirring rod is matched with the shape of the bottom of the mixing main body.

Optionally, the driving assembly includes:

The motor is arranged on the mixing main body;

the driving gear is fixedly sleeved on the output shaft of the motor;

the driven gear is fixedly sleeved on the rotating tube and meshed with the driving gear.

Optionally, the driving assembly further comprises a circuit control device, and the circuit control device is electrically connected with the motor.

Optionally, the circuit control device includes:

The power module is used for providing working voltage for each module;

the time detection module is used for detecting the motor driving time;

The motor driving module is used for driving the motor to rotate positively and negatively;

And the microprocessor control unit is used for controlling the working state of the motor driving module.

Optionally, a feeding hopper with a certain height is arranged at the feeding hole.

Optionally, the mixer further comprises a scraper blade which is arranged on the end face of the upper stirring tube, which is close to the inner wall of the mixing main body.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, the mixing teeth on the lower stirring rod are used for stirring the mixture at the lower part in the mixture main body, so that the deposition of industrial grade lithium carbonate on the inner bottom wall of the mixture main body is avoided, the upper stirring pipe is used for stirring the mixture at the upper part in the mixture main body, the industrial grade lithium carbonate and the mother solution are fully mixed under the mutual matching of the upper stirring pipe and the lower stirring rod, and then the carbon dioxide is uniformly and rapidly diffused into the lithium carbonate slurry through the plurality of diffusion holes formed on the upper stirring pipe and the plurality of stirring teeth formed on the lower stirring rod, so that the generation rate of the lithium bicarbonate solution is improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a mixing device according to the present application;

FIG. 2 is a schematic diagram of a circuit control device according to the present application;

FIG. 3 is a flow chart of a circuit control method according to the present application.

Reference numerals:

1. a mixing body; 2, a feeding hopper, 3, a discharging pipe, 31, an electric material valve;

4. stirring and diffusing components, 41, rotating pipes, 42, upper stirring pipes, 421, diffusing holes, 43, lower stirring rods, 431 and stirring teeth;

51. The motor comprises a motor, a driving gear, a 53, a driven gear, a 54, a power module, a 55, a time detection module, a 56, a microprocessor control unit and a 57, motor driving module;

6. High pressure piping.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In order to solve the problem that the efficiency of generating lithium bicarbonate solution is low because the existing mixing device is insufficient in mixing and carbon dioxide gas cannot uniformly and rapidly diffuse into lithium carbonate slurry.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-3, the embodiment of the utility model provides a mixing device for preparing high-purity lithium carbonate, which comprises a mixing main body 1, a feeding hopper 2, a discharging pipe 3, a stirring and diffusing assembly 4, a driving assembly and the like.

Wherein, compounding main part 1 is a jar body that inside is hollow structure, has seted up the feed inlet on it, has seted up the discharge gate under it, and compounding main part 1 is configured as the main place that carries out the compounding. The charging hopper 2 is arranged on the feeding hole and is configured as a main channel for the industrial grade lithium carbonate and the mother liquor to enter the interior of the mixing main body 1. The discharging pipe 3 is arranged on the discharging hole, an electric material valve 31 is arranged on the discharging pipe, and material is taken through the discharging pipe 3. The stirring and diffusing assembly 4 is arranged inside the mixing body 1, one end of the stirring and diffusing assembly is rotatably communicated with the high-pressure pipeline 6 of the carbon dioxide, and the stirring and diffusing assembly 4 is configured to mix the industrial-grade lithium carbonate and the mother solution and diffuse the carbon dioxide gas into the lithium carbonate slurry. The drive assembly is provided on the mixing body 1 and is configured to provide kinetic energy to the stirring diffusion assembly 4.

Specifically, as shown in fig. 1, the feeding hopper 2 is penetrating through the top of the mixing main body 1, in order to avoid that lithium carbonate slurry in the mixing main body 1 overflows from the feeding hopper 2 in the mixing process, the feeding hopper 2 can be set to be the feeding hopper 2 with a certain height, and the specific height can be adjusted according to practical application scenes.

The stirring and diffusing unit 4 comprises a rotary pipe 41, an upper stirring pipe 42, a lower stirring rod 43 and the like.

Wherein, the rotary tube 41 is rotatably arranged in the mixing body 1, the upper part of the rotary tube is of an opening structure, the inside of the rotary tube is of a hollow structure, and the lower part of the rotary tube is of a closed structure. The upper part of the rotary tube 41 is located above the top of the mixing body 1, i.e. outside the mixing body 1, in rotatable communication with the high pressure conduit 6 for carbon dioxide, and the lower part is located inside the mixing body 1, extending from the top of the mixing body 1 to a position adjacent to the bottom of the mixing body 1, the rotary tube 41 being configured as a main passage for carbon dioxide from outside the mixing body 1 into the inside of the mixing body 1. As a preferred embodiment, the rotation tube 41 is rotatably provided on the central axis of the mixing body 1.

The upper stirring tube 42 is fixedly arranged on the radial direction of the rotating tube 41, the inside of the upper stirring tube 42 is of a hollow structure, one end of the upper stirring tube 42 is communicated with the inside of the rotating tube 41, a plurality of diffusion holes 421 through which carbon dioxide can pass are uniformly formed in the upper stirring tube 42 at intervals, the carbon dioxide enters the upper stirring tube 42 through the rotating tube 41, and then the carbon dioxide is distributed in the mixing main body 1 through the diffusion holes 421 in the upper stirring tube 42. As a preferred embodiment, the number of the upper stirring pipes 42 is plural, and the upper stirring pipes 42 are staggered in sequence from top to bottom, and each upper stirring pipe 42 extends to the adjacent inner side wall of the mixing body 1 in the radial direction of the rotating pipe 41.

The lower stirring rod 43 is fixedly arranged at a position, close to the bottom, of the rotating pipe 41, the inside of the lower stirring rod 43 is of a hollow structure, one end of the lower stirring rod 43 is communicated with the inside of the rotating pipe 41, and the shape of the lower stirring rod 43 is matched with the shape of the bottom of the mixing main body 1. A plurality of hollow stirring teeth 431 with openings at the upper and lower parts are uniformly and fixedly arranged at intervals at the lower end of the lower stirring rod 43, and the stirring teeth 431 are not contacted with the bottom of the mixing main body 1. The carbon dioxide enters the lower stirring rod 43 through the rotation pipe 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, the stirring teeth 431 may function to break up the sediment deposited on the inner bottom wall of the mixing body 1 and more fully mix the lithium carbonate slurry, in addition to the above-described passage through which carbon dioxide passes into the mixing body 1. In a preferred embodiment, the number of the lower stirring rods 43 is two, and the lower stirring rods are respectively arranged at both sides of the rotary pipe 41.

The driving assembly comprises a motor 51, a driving gear 52, a driven gear 53 and the like.

Wherein the motor 51 is fixedly arranged on the mixing body 1, in particular at the top position of the mixing body 1.

The driving gear 52 is fixedly sleeved on the output shaft of the motor 51.

The driven gear 53 is fixedly sleeved on the rotating tube 41, specifically, at a position near the top of the rotating tube 41, and the driven gear 53 is meshed with the driving gear 52.

The motor 51 is started, the output shaft of the motor 51 drives the driving gear 52 to rotate, the driving gear 52 drives the driven gear 53 to synchronously rotate, the driven gear 53 drives the rotating tube 41 to synchronously rotate, and the rotating tube 41 drives the upper stirring tube 42 and the lower stirring rod 43 to synchronously rotate.

When the mixer is used, industrial lithium carbonate and mother liquor are thrown into the mixing main body 1 along the feeding hopper 2, the motor 51 is started, the motor 51 drives the rotary pipe 41 to rotate through the driving gear 52 and the driven gear 53, the rotary pipe 41 drives the upper stirring pipe 42 and the lower stirring rod 43 to synchronously rotate, the industrial lithium carbonate and the mother liquor are mixed through the plurality of upper stirring pipes 42 and the plurality of lower stirring rods 43, so that lithium carbonate slurry is formed, the industrial lithium carbonate can be effectively prevented from adhering to the bottom wall of the mixing main body 1 through the plurality of stirring teeth 431 to form sediments, and better mixing effect is realized through the cooperation of the upper stirring pipe 42 and the lower stirring rod 43. After the material mixing is finished, the high-pressure pipeline 6 of the carbon dioxide is opened, the carbon dioxide is evenly and rapidly injected into the lithium carbonate slurry in the material mixing main body 1 along the rotating pipe 41, the plurality of upper stirring pipes 42 and the plurality of lower stirring rods 43, and the carbon dioxide is fully contacted and mixed with the lithium carbonate slurry under the rotating action of the plurality of upper stirring pipes 42 and the plurality of lower stirring rods 43, so that a lithium bicarbonate solution is more efficiently generated, after the material mixing is finished, the motor 51 is closed, the electric material valve 31 is opened, and the generated lithium bicarbonate solution is taken out through the discharging pipe 3 for the next operation. In this embodiment, the carbon dioxide charging operation may be performed simultaneously with the rotation of the upper stirring pipe 42 and the lower stirring rod 43, or may be performed by charging carbon dioxide first, then closing the high-pressure pipe 6, and then rotating the upper stirring pipe 42 and the lower stirring rod 43.

In summary, in the utility model of the present disclosure, the mixture at the lower part in the mixture body 1 is stirred by the stirring teeth 431 on the lower stirring rod 43, the mixture at the upper part in the mixture body 1 is stirred by the upper stirring pipe 42, and the industrial lithium carbonate and the mother liquor are sufficiently mixed by the cooperation of the upper stirring pipe 42 and the lower stirring rod 43. And then the carbon dioxide is uniformly and rapidly diffused into the lithium carbonate slurry through a plurality of diffusion holes 421 formed in the upper stirring pipe 42 and a plurality of stirring teeth 431 formed in the lower stirring rod 43, so that the generation rate of the lithium bicarbonate solution is improved.

Further, a scraper (not shown) may be provided on the end surface of the upper stirring tube 42 adjacent to the inner wall of the mixing body 1 for cleaning the inner wall of the mixing body. Preferably, the blade may be made of a soft material having elasticity.

As a further improvement to 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 diffusion assembly 4 to operate in a periodic rotation manner by the motor 51.

As shown in fig. 2, the circuit control device includes a power module 54, a time detection module 55, a microprocessor control unit 56, and a motor drive module 57. Wherein the power module 54 is configured to provide an operating voltage to each module, the time detection module 55 is configured to detect a driving time of the motor 51, the microprocessor control unit 56 is configured to control an operating state of the motor driving module 57, and the motor driving module 57 is configured to drive forward and reverse rotation of the motor 51.

When the circuit control device works, the microprocessor control unit 56 sends a forward rotation signal to the motor driving module 57, the motor 51 rotates forward to drive the stirring diffusion assembly 4 to rotate forward, the time detection module 55 detects the forward rotation time of the motor 51, when the forward rotation time is A seconds, the microprocessor control unit 56 sends a stop signal to the motor driving module 57, the time detection module 55 detects the stop time of the motor 51, when the stop time is B seconds, the microprocessor control unit 56 sends a time up signal to the microprocessor control unit 56, the microprocessor control unit 56 sends a reverse rotation signal to the motor driving module 57, the motor 51 rotates reversely to further mix the mixed materials, the time detection module 55 detects the reverse rotation time of the motor 51, when the reverse rotation time is C seconds, the microprocessor control unit 56 sends a time up signal to the microprocessor control unit 56, the microprocessor control unit 56 sends a stop signal to the motor driving module 57, when the stop time is D seconds, the microprocessor control unit 56 sends a forward rotation signal to the motor driving module 57 again, and the steps of the cycle are repeated (see the above for 3). Wherein, the forward and reverse rotation time, the stop time and the cycle times can be set differently.

In the above process, at the moment when the upper stirring pipe 42 and the lower stirring rod 43 change the rotation direction, part of the mixed materials do not change the movement direction due to the inertia effect, so that the mixed materials move in the opposite direction with the upper stirring pipe 42 and the lower stirring rod 43 with changed directions, and the mixed materials are impacted and mixed more fully.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. A mixing device for preparing high-purity lithium carbonate is characterized by comprising a mixing main body, a stirring and diffusing assembly, a driving assembly and an upper stirring pipe, wherein a cavity is formed in the mixing main body, a feeding hole is formed in the mixing main body, a discharging hole is formed in the lower stirring pipe, the stirring and diffusing assembly is arranged on the mixing main body, one end of the stirring and diffusing assembly is rotatably communicated with a high-pressure pipeline of carbon dioxide, the driving assembly is arranged on the mixing main body and provides kinetic energy for the stirring and diffusing assembly, the stirring and diffusing assembly comprises a rotating pipe which is rotatably arranged in the mixing main body, one end of the stirring and diffusing assembly is rotatably communicated with a high-pressure pipeline of carbon dioxide, the other end of the stirring and diffusing assembly extends from one end of the mixing main body to the other end of the stirring pipe, one end of the stirring and diffusing hole is formed in the upper stirring pipe, the lower stirring rod is fixedly arranged on the rotating pipe, one end of the stirring rod is communicated with the rotating pipe, and hollow stirring teeth with openings are formed in the upper stirring rod and the lower stirring rod.

2. The mixing device for preparing high-purity lithium carbonate according to claim 1, wherein the number of the upper stirring pipes is plural, the upper stirring pipes are staggered in sequence from top to bottom, and each upper stirring pipe extends to be adjacent to the inner side wall of the mixing body along the radial direction of the rotating pipe.

3. A mixing device for preparing high-purity lithium carbonate according to claim 1 wherein the number of stirring teeth is plural, the stirring teeth are spaced apart on the lower stirring rod, and the stirring teeth are not in contact with the mixing body wall.

4. A 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, wherein the driving assembly comprises a motor arranged on the mixing main body, a driving gear fixedly sleeved on an output shaft of the motor, and a driven gear fixedly sleeved on the rotating tube and meshed with the driving gear.

6. The mixing device for preparing high purity lithium carbonate of claim 5 wherein the drive assembly further comprises a circuit control device electrically connected to the motor.

7. The mixing device for preparing high-purity lithium carbonate according to claim 6, wherein the circuit control device comprises a power supply module for supplying working voltage to each module, a time detection module for detecting the motor driving time, a motor driving module for driving the motor to rotate positively and negatively, and a microprocessor control unit for controlling the working state of the motor driving module.

8. A mixing device for preparing high-purity lithium carbonate according to claim 1, wherein a hopper with a certain height is arranged at the feed inlet.

9. A mixing device for preparing high purity lithium carbonate according to claim 1 further comprising a scraper disposed on an end surface of the upper stirring tube adjacent to the inner wall of the mixing body.