A lithium carbonate separation process and device

Abstract

The invention relates to the technical field of lithium carbonate preparation, and discloses a lithium carbonate separation process. The process comprises the following steps: cleaning and removing impurities from spodumene, drying, ball milling and screening to obtain primary raw ore powder, then putting the primary raw ore powder into an electric furnace for crystal transformation and roasting to obtain a β-spodumene roasting material, and adding water to prepare a β-spodumene roasting material mixed material; adding sodium bicarbonate powder into a high-pressure reactor, and collecting the generated carbon dioxide for standby use; introducing the β-spodumene roasting material mixed material into the high-pressure reactor, reacting for a period of time, and then releasing the standby carbon dioxide to obtain a pressure-cooked slurry, filtering and separating the pressure-cooked slurry after the reaction, and obtaining a target solution after filtering and separation; and crystallizing and drying the clear liquid filtrate of the target solution to obtain high-purity lithium carbonate. The process generates a product reacting with the β-spodumene roasting material and carbon dioxide required for carbonization through the decomposition of the raw material itself, and the process does not need to provide carbon dioxide separately, and the production process is simple and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium carbonate preparation, and in particular to a lithium carbonate separation process and device. Background Art

[0002] At present, the main processes for preparing lithium carbonate include sulfuric acid method, spodumene and sulfate mixed sintering method, sodium carbonate pressure leaching method and other methods. Among them, the most commonly used method is sodium carbonate pressure leaching method, which is simple to prepare and produces less waste.

[0003] At present, during the preparation process of the sodium carbonate pressure leaching method, lithium carbonate needs to be separated separately and a sufficient amount of carbon dioxide needs to be introduced separately. The carbon dioxide also needs to be prepared separately or purchased separately, which increases the production cost of the entire process.

[0004] At the same time, there will be differences in the size of the raw materials ground during the process preparation. There is a reaction time difference between the larger raw materials and the smaller raw materials, that is, the smaller ones react faster. Therefore, some large raw materials will not react during the preparation, resulting in the loss of lithium ions, which reduces the preparation effect of lithium carbonate. In addition, powder agglomeration will occur during grinding, resulting in a larger particle size of the prepared lithium carbonate micropowder. Subsequently, an additional crushing process is often required to reduce the particle size of the product, which greatly increases the complexity of the process and the technical problem of cost. Summary of the invention

[0005] The object of the present invention is to provide a lithium carbonate separation process and device to solve the technical problem that the existing process needs to separate the lithium carbonate separately and introduce a sufficient amount of carbon dioxide separately during the preparation process, wherein the separate preparation of carbon dioxide will increase the production cost of the entire process, and there will be differences in the sizes of the ground raw materials. There is a reaction time difference between the larger raw materials and the smaller raw materials, which leads to a larger particle size of the prepared lithium carbonate micropowder, thereby increasing the complexity of the process.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: a lithium carbonate separation process, comprising the following steps:

[0007] S100, cleaning and removing impurities from spodumene containing 6.05% lithium, crushing, ball-milling and sieving after drying, and mixing uniformly to obtain primary raw ore powder, and then placing the primary raw ore powder into an electric furnace for crystal transformation roasting at 1050° C. for 30 min to obtain β-spodumene roasting material, and adding water to prepare β-spodumene roasting material mixed material;

[0008] S200, adding sodium bicarbonate powder into a high-pressure reactor, reacting for a period of time and collecting the generated carbon dioxide for later use;

[0009] S300, introducing the β-spodumene roasted material mixture into an autoclave, cooling it to below a preset temperature after a period of reaction, and then releasing the reserved carbon dioxide to perform an autoclave reaction and obtain an autoclave slurry.

[0010] S400, filtering and separating the pressure-cooked slurry after the reaction to obtain a target solution after filtration and separation;

[0011] S500, diluting and filtering the upper target solution clear liquid, and crystallizing and drying the filtrate to obtain high-purity lithium carbonate.

[0012] As a preferred embodiment of the present invention, the ratio of the amount of the β-spodumene roasting material to the amount of the sodium bicarbonate is 3.5 to 7 times.

[0013] As a preferred embodiment of the present invention, the temperature in the autoclave in steps S200-S300 is 150-250°C, the autoclave stirring speed is 50-350 r / min, and the stirring time is 10-120 min.

[0014] Furthermore, a lithium carbonate separation device is provided, wherein the screening in step S100 is mainly performed by a screening mechanism, and the screening mechanism includes a spherical screening box, a screening assembly, a driving member and a knocking assembly;

[0015] A spherical screening box, wherein a feed inlet, a fine material outlet and a coarse material outlet are sequentially arranged on the side wall between the top and the bottom of the spherical screening box;

[0016] A screening assembly, rotatably connected to the center of the spherical screening box, for screening the material entering from the feed inlet and guiding the coarse and fine materials out of the coarse material outlet and the fine material outlet respectively;

[0017] The driving member is mounted on the outer side wall of the spherical screening box, and the driving member can drive the screening assembly to reciprocate in the inner cavity of the spherical screening box in a single rotation direction.

[0018] A striking component, one end of which rotates and extends out of the outer side wall of the spherical screening box, and the other end of which extends into the inner cavity of the spherical screening box, and the end of the striking component extending out of the outer side wall of the spherical screening box is linked to the driving member;

[0019] The driving member drives the screening component and the striking member to move synchronously in a single rotation direction, so that the screening component is struck once by the striking member in a corresponding manner within one cycle of reciprocating motion, thereby quickly separating the residual materials in the screening component.

[0020] As a preferred solution of the present invention, the screening assembly comprises a first semicircular frame, a second semicircular frame and a rotating shaft of the same structure, and one end of the rotating shaft extending out of the outer side wall of the spherical screening box is connected to the driving assembly;

[0021] The ends of the first semicircular frame and the second semicircular frame away from each other are respectively connected with the first annular stop seat and the second annular stop seat, the connecting parts of the first semicircular frame and the second semicircular frame are fixedly connected with the rotating shaft, the inner cavities of the first semicircular frame and the second semicircular frame are both provided with screens, the connecting parts of the first semicircular frame and the second semicircular frame are welded into an obtuse angle, and the angle between the first semicircular frame and the horizontal plane is greater than the angle between the second semicircular frame and the horizontal plane.

[0022] As a preferred solution of the present invention, the driving assembly includes a driving source, a driving connecting rod, a guide plate and a gear rod, the driving source is installed on the outer side wall of the spherical screening box, the driving end of the driving source is connected to the driving connecting rod through a driving shaft, and an I-shaped column is installed at one end of the driving connecting rod away from the driving source;

[0023] The gear rod is slidably connected to the spherical screening box, one end of the gear rod is connected to the guide plate, and a guide groove for the I-shaped column to slide is provided on the surface of the guide plate;

[0024] One end of the rotating shaft extending out of the outer side wall of the spherical screening box is connected to a gear meshing with the gear rod, and the surface of the gear is linked with the knocking assembly;

[0025] When the driving connecting rod makes a circular motion around the driving source, the guide plate drives the gear rod to move back and forth, so that the gear drives the rotating shaft to move back and forth.

[0026] As a preferred solution of the present invention, the striking assembly comprises a rotating shaft, a crankshaft, a rotating sleeve and a striking hammer, wherein the crankshaft is fixedly connected to the surface of the gear, and one end of the crankshaft extending out of the gear surface is connected to a fixed column;

[0027] One end of the rotating shaft that rotates and extends into the inner cavity of the spherical screening box is connected to the hammer, and one end of the rotating shaft that rotates and extends out of the outer side wall of the spherical screening box is connected to the rotating sleeve;

[0028] The rotating sleeve is provided with an opening for the fixing column to be slidably inserted.

[0029] As a preferred embodiment of the present invention, two striking hammers are provided, the two striking hammers are fixedly connected to the rotating shaft, and the angle formed by the two striking hammers is the same as the angle formed by the first semicircular frame and the second semicircular frame, and the opening direction of the angle formed by the two striking hammers is opposite to the opening direction of the angle formed by the first semicircular frame and the second semicircular frame.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The process generates products of reaction with β-spodumene roasting material and carbon dioxide required for carbonization through the decomposition of the raw materials themselves. The process does not require additional carbon dioxide, the production process is simple and efficient, and no additional configuration or purchase of carbon dioxide is required, thereby reducing the cost of process preparation.

[0032] At the same time, the screening component, driving component and striking component in the process are linked to form a screening and striking screen mechanism, in which the screening component can realize reciprocating motion under the drive of a single rotation direction of the driving component, thereby increasing the number of screening times, and can automatically separate and discharge coarse and fine materials in each cycle, thereby realizing rapid separation of coarse and fine materials without stopping the machine, thereby improving the efficiency of post-lithium carbonate preparation.

[0033] At the same time, during the screening process, the knocking component can also synchronously cooperate with the reciprocating motion of the screening component and knock on the screen to make the screen vibrate. On the one hand, it can prevent large particles of material from clogging the screen mesh, and on the other hand, it can also accelerate the screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the outer side wall of the middle spherical screening box;

[0037] Figure 3 For the present invention Figure 1 Schematic diagram of the structure after the overall structure moves;

[0038] Figure 4 For the present invention Figure 2Schematic diagram of the structure of the outer side wall of the middle spherical screening box;

[0039] The numbers in the figure represent the following:

[0040] 1. Spherical screening box; 2. Screening assembly; 3. Driving assembly; 4. Beating assembly; 5. Feed inlet; 6. Fine material outlet; 7. Coarse material outlet;

[0041] 21. first semicircular frame; 22. second semicircular frame; 23. rotating shaft; 24. screen; 25. first annular stopper; 26. second annular stopper;

[0042] 31. driving source; 32. driving connecting rod; 33. guide plate; 34. gear rod; 35. I-shaped column; 36. guide groove; 37. gear

[0043] 41. Rotating shaft; 42. Bending rod; 43. Rotating sleeve; 44. Beating hammer; 45. Fixed column; 46. Opening. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] A lithium carbonate separation process comprises the following steps:

[0046] S100, cleaning and removing impurities from spodumene containing 6.05% lithium, crushing, ball-milling and sieving after drying, and mixing uniformly to obtain primary raw ore powder, and then placing the primary raw ore powder into an electric furnace for crystal transformation roasting at 1050° C. for 30 min to obtain β-spodumene roasting material, and adding water to prepare β-spodumene roasting material mixed material;

[0047] S200, adding sodium bicarbonate powder into a high-pressure reactor, reacting for a period of time and collecting the generated carbon dioxide for later use;

[0048] S300, introducing the β-spodumene roasted material mixture into an autoclave, cooling it to below a preset temperature after a period of reaction, and then releasing the reserved carbon dioxide to perform an autoclave reaction and obtain an autoclave slurry.

[0049] S400, filtering and separating the pressure-cooked slurry after the reaction to obtain a target solution after filtration and separation;

[0050] S500, diluting and filtering the upper target solution clear liquid, and crystallizing and drying the filtrate to obtain high-purity lithium carbonate.

[0051] In order to precipitate lithium ions in the β-spodumene roasting material mixture as much as possible during the reaction, it is necessary to add as much carbonate ions as possible to generate supersaturated lithium carbonate.

[0052] Specifically, the ratio of the amount of the β-spodumene roasting material to the amount of the sodium bicarbonate is 3.5 to 7 times.

[0053] On the one hand, this can provide sufficient carbonate ions to generate lithium carbonate precipitation as much as possible, and on the other hand, it can also generate sufficient carbon dioxide, which can facilitate subsequent carbonation and further increase the precipitation rate of lithium ions.

[0054] Furthermore, the temperature in the autoclave in steps S200-S300 is 150-250°C, the autoclave stirring speed is 50-350 r / min, and the stirring time is 10-120 min.

[0055] This can allow the sodium bicarbonate to be fully thermally decomposed to produce sufficient carbon dioxide, and can also facilitate the subsequent reaction of lithium ions in the β-spodumene roasting material.

[0056] Among them, the backup of carbon dioxide in the high-pressure reactor only requires adding a gas recovery system to the high-pressure reactor, or choosing a gas recovery system with its own

[0057] In step S100, the ground material is screened. The purpose of screening is mainly to keep the material as consistent in size as possible and to make the screening efficiency as high as possible, thereby improving the production efficiency of the entire lithium carbonate preparation.

[0058] The process generates products of reaction with β-spodumene roasting material and carbon dioxide required for carbonization through the decomposition of the raw materials themselves. The process does not require additional carbon dioxide, and the production process is simple and efficient.

[0059] At the same time, the screening component, driving component and striking component in the process are linked to form a screening and striking screen mechanism, in which the screening component can realize reciprocating motion under the drive of a single rotation direction of the driving component, thereby increasing the number of screening times, and can automatically separate and discharge coarse and fine materials in each cycle, thereby realizing rapid separation of coarse and fine materials without stopping the machine, thereby improving the efficiency of post-lithium carbonate preparation.

[0060] At the same time, during the screening process, the knocking component can also synchronously cooperate with the reciprocating motion of the screening component and knock on the screen to make the screen vibrate. On the one hand, it can prevent large particles of material from clogging the screen mesh, and on the other hand, it can also accelerate the screening.

[0061] Specifically, Figure 1-4As shown, the screening in step S100 is mainly performed by a screening mechanism, which includes a spherical screening box 1, a screening assembly 2, a driving assembly 3 and a knocking assembly 4;

[0062] A spherical screening box 1, on the side wall between the top and the bottom of the spherical screening box 1, a feed inlet 5, a fine material outlet 6 and a coarse material outlet 7 are sequentially arranged;

[0063] The screening component 2 is rotatably connected to the center of the spherical screening box 1, and is used to screen the materials entering from the feed inlet 5 and to discharge the coarse and fine materials from the coarse material outlet 7 and the fine material outlet 6 respectively;

[0064] The driving assembly 3 is mounted on the outer wall of the spherical screening box 1. The driving assembly 3 can drive the screening assembly 2 to reciprocate in the inner cavity of the spherical screening box 1 in a single rotation direction.

[0065] The knocking assembly 4 has one end that rotates and extends out of the outer wall of the spherical screening box 1, and the other end that extends into the inner cavity of the spherical screening box 1. The end of the knocking assembly 4 that extends out of the outer wall of the spherical screening box 1 is linked to the driving assembly 3;

[0066] The driving component 3 drives the screening component 2 and the knocking component 4 to move synchronously in a single rotation direction, so that the screening component 2 is knocked once by the knocking component 4 in one cycle of reciprocating motion, thereby quickly separating the residual materials in the screening component 2.

[0067] Specifically, Figure 1-4 As shown, the screening assembly 2 comprises a first semicircular frame 21, a second semicircular frame 22 and a rotating shaft 23 of the same structure, and one end of the rotating shaft 23 extending out of the outer wall of the spherical screening box 1 is connected to the driving assembly 3;

[0068] The ends of the first semicircular frame 21 and the second semicircular frame 22 that are away from each other are respectively connected with a first annular stopper 25 and a second annular stopper 26. The connection between the first semicircular frame 21 and the second semicircular frame 22 is fixedly connected with the rotating shaft 23. The inner cavities of the first semicircular frame 21 and the second semicircular frame 22 are both provided with a screen 24.

[0069] The connection between the first semicircular frame 21 and the second semicircular frame 22 is welded to form an obtuse angle, and the angle between the first semicircular frame 21 and the horizontal plane is greater than the angle between the second semicircular frame 22 and the horizontal plane.

[0070] Since the first semicircular frame 21 and the second semicircular frame 22 are set at an obtuse angle, when entering the screen 24 in the first semicircular frame 21 from the feed port 5, the position of the first semicircular frame 21 is higher than the position of the second semicircular frame 22, so the mixed material first rolls down from the first semicircular frame 21, and when rolling to the first semicircular frame 21, it rolls again under the action of the second semicircular frame 82 until it rolls to the end of the second semicircular frame 22, and when the second semicircular frame 22 is at a flat angle, the first semicircular frame 21 is still in an inclined state, and when the first semicircular frame 21 continues to rotate, the mixed material located on the first semicircular frame 21 and the second semicircular frame 22 will gather at the connection between the two, relatively speaking, when the angle of the second semicircular frame 22 increases, the angle of the first semicircular frame 21 is still in a reduced state, at this time, the mixed material in the first semicircular frame 21 can travel a longer distance, thereby increasing the number of screenings.

[0071] Since the screening component 2 needs to rotate back and forth once in one cycle, that is, rotate from the initial position to the final position, and then rotate from the final position to the initial position, the screening component 2 has a tendency to rotate in two different directions. Although it can be driven by a device with forward and reverse functions, there will be a work stop period during the conversion process of forward and reverse rotation, which will reduce the screening efficiency. Therefore, the screening component 2 can be driven to move periodically by rotating the driving component 3 in a single direction.

[0072] Specifically, Figure 1-4 As shown, the driving assembly 3 includes a driving source 31, a driving connecting rod 32, a guide plate 33 and a gear rod 34. The driving source 31 is installed on the outer wall of the spherical screening box 1. The driving end of the driving source 31 is connected to the driving connecting rod 32 through a driving shaft. The end of the driving connecting rod 32 away from the driving source 31 is installed with an I-shaped column 35;

[0073] The gear rod 34 is slidably connected to the spherical screening box 1, and one end of the gear rod 34 is connected to the guide plate 33. The surface of the guide plate 33 is provided with a guide groove 36 for the I-shaped column 35 to slide.

[0074] One end of the rotating shaft 23 extending out of the outer wall of the spherical screening box 1 is connected to a gear 37 meshing with the gear rod 34, and the surface of the gear 37 is linked with the knocking assembly 4;

[0075] When the driving connecting rod 32 makes a circular motion around the driving source 31 , the guide plate 33 drives the gear rod 34 to move back and forth, so that the gear 37 drives the rotating shaft 23 to move back and forth.

[0076] Among them, at this time, under the drive of the driving component 3, the mixed material rolls along the screening component 2, and when the driving connecting rod 32 rotates to the highest point and then to the lowest point, at this time, one end of the first semicircular frame 21 continues to decline and the other end rises, while one end of the second semicircular frame 22 continues to rise and the other end declines, and the descending end of the second semicircular frame 22 transfers the material to the first semicircular frame 21, thereby making the mixed material roll back and forth, and at this time, the inclination angle of the screening component 2 will show a trend of first decreasing and then increasing.

[0077] When the driving connecting rod 32 rotates to the lowest point and then to the highest point, at this time, one end of the first semicircular frame 21 continues to rise and the other end decreases, while one end of the second semicircular frame 22 continues to decrease and the other end rises, and the descending end of the first semicircular frame 21 transfers the material to the second semicircular frame 22. At this time, the inclination angle of the screening component 2 will tend to increase first and then decrease.

[0078] During the movement of the first semicircular frame 21 and the second semicircular frame 22, the material in the screen 24 located on the first semicircular frame 21 and the second semicircular frame 22 can increase its kinetic potential energy during the up and down movement, that is, it can increase the rolling speed of the material, thereby facilitating the material to be discharged from the fine material outlet 6 and the coarse material outlet 7 respectively. However, after all, all the materials are piled together, and large particles of material may clog the screen mesh. Therefore, the screen 24 is vibrated by the knocking of the knocking component 4.

[0079] The angle of rotation of the rotating shaft 23 driven by the gear 37 cannot be a complete circle, that is, the rotation angle is less than 360°. At the same time, when the rotating shaft 23 rotates to the limit, that is, the initial position and the final position, the positions of the first annular stopper 25 and the second annular stopper 26 cannot interfere with the discharge of the fine material outlet 6 and the coarse material outlet 7.

[0080] Specifically, Figure 1-4 As shown, the striking assembly 4 includes a rotating shaft 41, a bent rod 42, a rotating sleeve 43 and a striking hammer 44. The bent rod 42 is fixedly connected to the surface of the gear 37, and one end of the bent rod 42 extending from the surface of the gear 37 is connected to a fixed column 45;

[0081] One end of the rotating shaft 41 that rotates and extends into the inner cavity of the spherical screening box 1 is connected to the hammer 44, and one end of the rotating shaft 41 that rotates and extends out of the outer wall of the spherical screening box 1 is connected to the rotating sleeve 43;

[0082] The rotating sleeve 43 is provided with an opening 46 for the fixing column 45 to be slidably inserted into.

[0083] The gear 37 is driven to move back and forth during the back and forth movement of the gear rod 34, and the back and forth movement of the gear 37 drives the curved rod 42 to move back and forth, wherein the rotation angle range of the gear 37 is 0-270°, so that the opening 46 on the rotating sleeve 43 can be symmetrically oriented to the left and right sides, that is, the rotating shaft 41 can rotate left and right in a certain range, and during the rotation, the striking hammer 44 can contact the screens of the screens 24 on the first semicircular frame 21 and the second semicircular frame 22, thereby producing hammering.

[0084] Further, such as Figure 1-4 As shown, two striking hammers 44 are provided, and the two striking hammers 44 are fixedly connected to the rotating shaft 41, and the angle formed by the two striking hammers 44 is the same as the angle formed by the first semicircular frame 21 and the second semicircular frame 22, and the opening direction of the angle formed by the two striking hammers 44 is opposite to the opening direction of the angle formed by the first semicircular frame 21 and the second semicircular frame 22.

[0085] Such a setting can ensure that the first semicircular frame 21 or the second semicircular frame 22 can be struck by the striking hammer 44 during the descending process. Since the striking hammer 44 is in an ascending state when the first semicircular frame 21 or the second semicircular frame 22 descends, an impact force can be generated between the two objects moving toward each other, thereby improving the striking effect of the striking hammer 44.

[0086] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A lithium carbonate separation process, characterized in that: The following steps are involved: S100, cleaning and removing impurities from spodumene containing 6.05% lithium, crushing, ball-milling and sieving after drying, and mixing uniformly to obtain primary raw ore powder, and then placing the primary raw ore powder into an electric furnace for crystal transformation roasting at 1050° C. for 30 min to obtain β-spodumene roasting material, and adding water to prepare β-spodumene roasting material mixed material; S200, adding sodium bicarbonate powder into a high-pressure reactor, reacting for a period of time and collecting the generated carbon dioxide for later use; S300, introducing the β-spodumene roasted material mixture into an autoclave, cooling it to below a preset temperature after a period of reaction, and then releasing the reserved carbon dioxide to perform an autoclave reaction and obtain an autoclave slurry. S400, filtering and separating the pressure-cooked slurry after the reaction to obtain a target solution after filtration and separation; S500, diluting and filtering the upper target solution clear liquid, and crystallizing and drying the filtrate to obtain high-purity lithium carbonate.

2. A lithium carbonate separation process according to claim 1, characterized in that: The ratio of the amount of the β-spodumene roasting material to the amount of the sodium bicarbonate is 3.5 to 7 times.

3. A device utilizing the lithium carbonate separation process according to any one of claims 1 to 3, characterized in that: The temperature in the autoclave in steps S200-S300 is 150-250°C, the autoclave stirring speed is 50-350 r / min, and the stirring time is 10-120 min.

4. A lithium carbonate separation device according to claim 1, characterized in that: The screening in step S100 is mainly performed by a screening mechanism, which comprises a spherical screening box (1), a screening assembly (2), a driving assembly (3) and a knocking assembly (4); A spherical screening box (1), wherein a feed inlet (5), a fine material outlet (6) and a coarse material outlet (7) are sequentially arranged on the side wall between the top and the bottom of the spherical screening box (1); A screening component (2) is rotatably connected to the center of the spherical screening box (1) to screen the material entering from the feed inlet (5) and to discharge the coarse and fine materials from the coarse material outlet (7) and the fine material outlet (6) respectively; The driving assembly (3) is mounted on the outer side wall of the spherical screening box (1), and the driving assembly (3) can drive the screening assembly (2) to reciprocate in the inner cavity of the spherical screening box (1) in a single rotation direction. A striking component (4), one end of which rotates and extends out of the outer wall of the spherical screening box (1), and the other end of which extends into the inner cavity of the spherical screening box (1); the end of the striking component (4) extending out of the outer wall of the spherical screening box (1) is linked to the driving component (3); The driving component (3) drives the screening component (2) and the knocking component (4) to move synchronously in a single rotation direction, so that the screening component (2) is knocked once by the knocking component (4) in a corresponding cycle of reciprocating motion, thereby quickly separating the residual materials in the screening component (2).

5. A lithium carbonate separation device according to claim 4, characterized in that: The screening assembly (2) comprises a first semicircular frame (21), a second semicircular frame (22) and a rotating shaft (23) of the same structure, and one end of the rotating shaft (23) is connected to the driving assembly (3) by rotating and extending out of the outer wall of the spherical screening box (1); The ends of the first semicircular frame (21) and the second semicircular frame (22) which are away from each other are respectively connected with a first annular stop seat (25) and a second annular stop seat (26); the connection between the first semicircular frame (21) and the second semicircular frame (22) is fixedly connected to the rotating shaft (23); the inner cavities of the first semicircular frame (21) and the second semicircular frame (22) are both provided with screens (24); the connection between the first semicircular frame (21) and the second semicircular frame (22) is welded to form an obtuse angle, and the angle between the first semicircular frame (21) and the horizontal plane is greater than the angle between the second semicircular frame (22) and the horizontal plane.

6. A lithium carbonate separation device according to claim 5, characterized in that: The driving assembly (3) comprises a driving source (31), a driving connecting rod (32), a guide plate (33) and a gear rod (34); the driving source (31) is mounted on the outer side wall of the spherical screening box (1); a driving end of the driving source (31) is connected to the driving connecting rod (32) via a driving shaft; an I-shaped column (35) is mounted on one end of the driving connecting rod (32) away from the driving source (31); The gear rod (34) is slidably connected to the spherical screening box (1), one end of the gear rod (34) is connected to the guide plate (33), and a guide groove (36) for the I-shaped column (35) to slide is provided on the surface of the guide plate (33); One end of the rotating shaft (23) extending out of the outer wall of the spherical screening box (1) is connected to a gear (37) meshing with the gear rod (34), and the surface of the gear (37) is linked to the knocking assembly (4); When the driving connecting rod (32) performs a circular motion around the driving source (31), the guide plate (33) drives the gear rod (34) to move back and forth, so that the gear (37) drives the rotating shaft (23) to move back and forth.

7. A lithium carbonate separation device according to claim 6, characterized in that: The striking assembly (4) comprises a rotating shaft (41), a bent rod (42), a rotating sleeve (43) and a striking hammer (44); the bent rod (42) is fixedly connected to the surface of the gear (37); one end of the bent rod (42) extending out of the surface of the gear (37) is connected to a fixed column (45); One end of the rotating shaft (41) that rotates and extends into the inner cavity of the spherical screening box (1) is connected to the striking hammer (44), and one end of the rotating shaft (41) that rotates and extends out of the outer wall of the spherical screening box (1) is connected to the rotating sleeve (43); The rotating sleeve (43) is provided with an opening (46) for the fixing column (45) to be slidably inserted.

8. A lithium carbonate separation device according to claim 7, characterized in that: Two striking hammers (44) are provided, and the two striking hammers (44) are fixedly connected to the rotating shaft (41). The angle formed by the two striking hammers (44) is the same as the angle formed by the first semicircular frame (21) and the second semicircular frame (22). The opening direction of the angle formed by the two striking hammers (44) is opposite to the opening direction of the angle formed by the first semicircular frame (21) and the second semicircular frame (22).

Images