Washing device for preparation and production of high-purity lithium carbonate

Abstract

The invention relates to the technical field of lithium carbonate washing devices, and discloses a washing device for preparation and production of high-purity lithium carbonate. According to the grinding device, an upper grinding disc and a lower grinding disc are connected in an attached mode, so that a closed grinding bin is formed in a grinding groove, and when the upper grinding disc drives a grinding shaft to rotate and continuously rubs with the bottom of the inner wall of the grinding groove, the grinding shaft can continuously rotate in a rotating groove; when a small-volume lithium carbonate polymer enters the rolling bin through a plurality of strip-shaped feeding holes formed in the top of the upper grinding disc, the continuously rotating rolling shaft continuously rolls the lithium carbonate polymer to crush the lithium carbonate polymer, so that water-soluble impurities doped in the deep layer of the lithium carbonate polymer can be quickly exposed to be dissolved in water, and the lithium carbonate polymer is prevented from being damaged. The lithium carbonate slurry deep washing device solves the problem that a traditional lithium carbonate washing device cannot quickly remove water-soluble impurities deeply doped in lithium carbonate polymers in the washing process.

Description

Technical Field

[0001] The present application relates to the technical field of lithium carbonate washing devices, and in particular to a washing device for the preparation and production of high-purity lithium carbonate. Background Art

[0002] Lithium carbonate is a colorless monoclinic crystal or white powder that can be used to make ceramics, catalysts, lithium-ion battery raw materials, etc.

[0003] The existing device for cleaning lithium carbonate generally mixes the lithium carbonate mixture filter cake that has passed the filtration process with deionized water to form a lithium carbonate slurry, and simultaneously cooperates with a rotating stirring mechanism for stirring and cleaning, and cooperates with an upper guide pipe to remove impurities with low density and easy to float on the liquid surface. However, due to the characteristics of lithium carbonate itself that it is easy to agglomerate and adhere, some water-soluble impurities are wrapped and adhered to the material and are difficult to remove deeply. The washing method of simply stirring the lithium carbonate slurry cannot expose the soluble water impurities wrapped in the material, resulting in a low purity of the final lithium carbonate product. Summary of the invention

[0004] The present application proposes a washing device for the preparation and production of high-purity lithium carbonate, which has the advantages of stirring lithium carbonate slurry and crushing lithium carbonate polymers at the same time, so that water-soluble impurities doped in the deep layer of lithium carbonate polymers can be quickly exposed and dissolved in water, thereby completing the deep washing of lithium carbonate slurry. It is used to solve the problem that the existing lithium carbonate washing device has too single cleaning method and relies solely on rotary stirring to fail to expose some water-soluble impurities wrapped in the material, resulting in the problem of low purity of the prepared lithium carbonate.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a washing device for the preparation and production of high-purity lithium carbonate, comprising a washing barrel, a plurality of supporting legs are fixedly connected to the bottom of the washing barrel, a top cover for sealing is installed on the top of the washing barrel, an exhaust valve and a feed pipe are respectively penetrated on the top cover, a motor, the motor is fixedly installed on the top of the top cover, and the output shaft passes through the top cover and is fixedly connected to a rotating rod, a plurality of stirring rods for stirring lithium carbonate slurry are fixedly installed on the rotating rod, an upper grinding disc, the center of the circle of the upper grinding disc is fixedly connected to the bottom of the rotating rod, a plurality of annularly distributed rotating grooves are opened at the bottom of the upper grinding disc, and a rolling shaft for rolling and crushing lithium carbonate polymer is rotatably connected in the rotating groove, a lower grinding disc, the lower grinding disc is fixedly connected to the bottom of the inner wall of the washing barrel, and the lower grinding disc is fitted and connected to the upper grinding disc, a rolling groove is opened on the top of the lower grinding disc, and a groove for discharging crushed particles is opened on the rolling groove, and a drainage hole is opened at the bottom of the inner wall of the washing barrel, and a drainage pipe for discharging is penetrated and connected at the bottom.

[0006] Furthermore, an annular cavity matching its contour is provided in the washing barrel, and an electric heating layer for heating lithium carbonate slurry is embedded in the annular cavity, a heat storage cavity connected to a plurality of rotating grooves is provided in the upper grinding disc, a heat preservation cavity is provided in the rotating rod, and a heat conduction shaft is concentrically arranged in the heat preservation cavity, the bottom end of the heat conduction shaft passes through the upper grinding disc and is fixedly connected in the heat storage cavity, one end of the plurality of stirring rods located on the rotating rod all passes through the heat preservation cavity and are fit-connected to the surface of the heat conduction shaft, the piston in the rotating groove is connected to a piston bar, and the piston bar is located above the rolling shaft, a brush piece matching the arc contour of the top of the rolling shaft is fixedly connected to the side of the piston bar opposite to the rolling shaft, and a plurality of springs are fixedly connected between the top of the piston bar and the inner wall of the heat storage cavity.

[0007] Furthermore, the insulation cavity and the rotating rod are filled with insulation cotton, which is made of a material with good thermal conductivity.

[0008] Furthermore, a filter screen for filtering impurities and lithium carbonate particles is embedded in the top of the drain hole, and the filter screen is at the same horizontal plane as the bottom of the inner wall of the washing bucket. A sealing plug for sealing is embedded in the bottom of the drain hole, and the top of the sealing plug is lower than the bottom of the inner wall of the drain pipe.

[0009] Furthermore, the top of the upper grinding disc is provided with a plurality of strip-shaped feed ports distributed in a circular array, and the top of the strip-shaped feed port is fixedly connected with an intercepting plate matching its length, and the upper half of the intercepting plate is provided with a folded angle, and the inner wall of the folded angle is an obtuse angle toward the side of the strip-shaped feed port.

[0010] Furthermore, an interception block is fixedly connected to one end of the interception plate away from the rotating rod, and the size of the interception block is adapted to the size of the end of the strip-shaped feed port.

[0011] Furthermore, a plurality of connection blocks distributed in an annular manner are fixedly connected to the arc-shaped contour on the outer side of the upper grinding disc.

[0012] Furthermore, bristles that fit the bottom of the inner wall of the washing tub are fixedly mounted on the bottom of the connecting block.

[0013] Furthermore, a plurality of annularly distributed magnetic blocks are embedded and installed at the bottom of the washing tub, and the positions of the plurality of magnetic blocks correspond to those of the tilting blocks.

[0014] Furthermore, the tilting block is made of magnetic material, and the magnetic pole is the same as that of the magnetic block.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present application provides a washing device for the preparation and production of high-purity lithium carbonate. A rotating rod drives multiple stirring rods to stir and wash the lithium carbonate slurry while driving the upper grinding disc fixedly connected thereto to rotate synchronously. Due to the close connection between the upper grinding disc and the lower grinding disc, a relatively closed grinding bin is formed at the grinding groove. When the upper grinding disc drives the grinding shaft to rotate and continuously rubs against the bottom of the inner wall of the grinding groove, the grinding shaft will continue to rotate in the rotating groove. When a small volume of lithium carbonate polymer enters the grinding bin through multiple strip feed ports opened on the top of the upper grinding disc, the continuously rotating grinding shaft will continuously grind the lithium carbonate polymer to crush it, thereby causing the water-soluble impurities doped in the deep layer of the lithium carbonate polymer to be quickly exposed and dissolved in water, thereby completing the deep washing of the lithium carbonate slurry. This solves the problem that traditional lithium carbonate washing devices cannot quickly remove the water-soluble impurities doped in the deep layer of the lithium carbonate polymer during the washing process, thereby improving the purity of the lithium carbonate product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of the washing tub and the electric heating layer in the present invention;

[0022] Figure 5 It is a schematic cross-sectional structural diagram of the upper grinding disc in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the lower grinding disc in the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the rolling shaft, piston strip, brush sheet and spring in the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the filter screen, connecting block, tilting block and bristles in the present invention.

[0026] In the figure: 1. washing barrel; 2. electric heating layer; 3. motor; 4. rotating rod; 5. stirring rod; 6. upper grinding disc; 601. rotating groove; 602. rolling shaft; 603. strip feed port; 604. heat storage chamber; 605. piston bar; 606. brush piece; 607. spring; 608. heat preservation chamber; 609. heat conduction shaft; 610. heat insulation cotton; 7. lower grinding disc; 701. rolling groove; 8. intercepting plate; 801. intercepting block; 9. drainage hole; 901. filter screen; 902. sealing plug; 10. drainage pipe; 11. connecting block; 1101. tilting block; 1102. bristles; 1103. magnetic block; 12. top cover; 1201. exhaust valve; 1202. feeding pipe. DETAILED DESCRIPTION

[0027] 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.

[0028] Embodiment 1

[0029] like Figure 1-Figure 2 As shown, first, the lithium carbonate slurry to be washed is poured into the washing bucket (1) through the feeding pipe (1202) installed on the top cover (12). After the lithium carbonate slurry and water are fed, the motor (3) installed on the top cover (12) is started, and the output shaft of the motor (3) that passes through the top cover (12) drives the rotating rod (4) fixedly connected to the output shaft to rotate synchronously, so that the multiple stirring rods (5) fixedly installed on the rotating rod (4) are continuously rotated and stirred in the slurry. During the continuous rotation of the multiple stirring rods (5), on the one hand, the slurry can be uniformly stirred, so that some water-soluble impurities wrapped on the surface of the polymer can be accelerated to dissolve with water, thereby improving the washing effect of the slurry. On the other hand, during the rotation process, the stirring rods (5) will randomly hit and crush the large particles of lithium carbonate polymer mixed in the slurry, so that it is converted into a small volume of lithium carbonate polymer, which is convenient for the subsequent further crushing of these small volumes of lithium carbonate polymers, so that the water-soluble impurities wrapped in the deep layer of the lithium carbonate polymer are completely exposed, and are fused and dissolved with water, thereby improving the purity of lithium carbonate after washing of the device and enhancing the washing effect.

[0030] like Figure 2-Figure 3As shown, when the rotating rod (4) starts to rotate, the upper grinding disc (6) fixedly connected thereto will rotate synchronously. Due to the close connection between the upper grinding disc (6) and the lower grinding disc (7), a relatively closed rolling bin is formed at the rolling groove (701). When the upper grinding disc (6) drives the rolling shaft (602) to rotate and continuously rubs against the bottom of the inner wall of the rolling groove (701), the rolling shaft (602) will continue to rotate in the rotating groove (601). When a small volume of lithium carbonate polymer enters the rolling bin through a plurality of strip-shaped feed ports (603) opened on the top of the upper grinding disc (6), the continuously rotating rolling shaft (602) will continuously roll the lithium carbonate polymer to crush it. In this process, the groove on the rolling groove (701) corresponds to the position of the drainage hole (9), so that the lithium carbonate polymer that has not been dissolved after being crushed is Small particles of lithium carbonate and impurities will be thrown out of the rolling trough (701) through the grooves on the rolling trough (701) under the action of the centrifugal force generated during the rotation of the rolling shaft (602), and thrown to the top of the drainage hole (9) to facilitate subsequent filtration and collection. At this time, the small particles of lithium carbonate leaving the rolling trough (701) will first accumulate in the drainage hole (9) during natural sedimentation and filtration, and then be discharged and collected through the drainage pipe (10) at an appropriate time, completing the deep washing of the lithium carbonate slurry, solving the problem that the traditional lithium carbonate washing device cannot quickly remove the water-soluble impurities deeply doped in the lithium carbonate polymer during the washing process, and can increase the purity of the washed lithium carbonate without adding a crushing process, thereby improving the washing efficiency and effect, saving the washing cost, and increasing the preparation output of lithium carbonate.

[0031] Embodiment 2

[0032] On the basis of Example 1, this example makes further improvements. In order to further increase the yield of high-purity lithium carbonate in the washing process of lithium carbonate slurry, the following improvements are made based on the fact that lithium carbonate itself is slightly soluble in water and its solubility in cold water is greater than that in hot water. Figure 2-Figure 8 As shown, an annular cavity matching the contour of the washing barrel (1) is provided, and an electric heating layer (2) is embedded and installed. At this time, during the washing process of the lithium carbonate slurry, the electric heating layer (2) will be started first to heat the entire lithium carbonate slurry to maintain it within a suitable temperature range. Increasing the temperature of the lithium carbonate slurry can reduce the solubility of lithium carbonate and enhance the dissolution rate of other water-soluble impurities in the slurry, thereby achieving a trade-off effect, which helps to increase the output and purity of the lithium carbonate produced and reduce the dissolution loss of lithium carbonate in the washing process. In addition, while ensuring the improvement of the insulation effect, it can avoid the potential safety hazards caused by the leakage of high-temperature steam or the impact of the slurry to cause it to splash, and greatly reduce the additional cost waste caused by the unnecessary processes of high-temperature steam in filtration and manufacturing.

[0033] It is worth noting that the rotating rod (4) is made hollow, with a concentrically arranged heat preservation chamber (608) in the middle, and a heat conduction shaft (609) is arranged on the vertical line of the axis of the heat preservation chamber (608). The bottom of the heat conduction shaft (609) passes through the upper grinding disc (6) and is fixed in the heat storage chamber (604), and the end of the plurality of stirring rods (5) close to the rotating rod (4) passes through the heat preservation chamber (608) and extends to be connected with the surface of the heat conduction shaft (609). This arrangement can better transfer heat through the heat conduction shaft (609) through the larger contact surface between the stirring rod (5) and the slurry and the rotating action. 9) conduction into the heat storage chamber (604) and heats the rolling shaft (602). The heated rolling shaft (602) can crush the lithium carbonate polymer in the relatively closed rolling groove (701) while accelerating the dissolution of water-soluble impurities and reducing the dissolution of lithium carbonate particles. Compared with the traditional heating method using filtered high-temperature water vapor, the above setting can appropriately increase the temperature of the lithium carbonate polymer in the crushing area and the crushed lithium carbonate particles and water-soluble impurities, and improve the washing effect of lithium carbonate according to the change in the solubility of the lithium carbonate particles and the water-soluble impurities in water temperature.

[0034] Among them, there is a sealed environment between the top of the piston bar (605) and the heat storage chamber (604), and the internal air pressure will increase after the heat enters the heat storage chamber (604), thereby pushing the piston bar (605) to move downward. At this time, the brush plate (606) at the bottom of the piston bar (605) will gradually fit with the top of the rolling shaft (602) and scrape off the particles adhering to the rolling shaft (602), so as to prevent the particles of different substances from accumulating and blocking the rolling shaft (602) and affecting the normal rotation of the rolling shaft (602). The spring (607) between the top of the piston bar (605) and the heat storage chamber (604) has its own elasticity to assist the piston bar (605) to reset after stopping working. At the same time, its pulling force can also prevent the air pressure from being too high, causing The surface pressure between the brush sheet (606) and the rolling shaft (602) is too large, which affects the rotation of the rolling shaft (602). The above arrangement allows the heat to be introduced into the heat storage chamber (604) through the heat preservation chamber (608) and the heat conduction shaft (609) while the stirring rod (5) rotates. This not only increases the temperature in the rolling tank (701), accelerates the dissolution of water-soluble impurities, and reduces the dissolution of lithium carbonate particles, but also utilizes the principle of expansion when the air pressure in a closed air increases at high temperature, with the help of the piston bar (605) and the brush sheet (606), to remove particles accidentally sticking to the surface of the rolling shaft (602) in continuous rotation, thereby avoiding blockage of the rolling shaft (602), enhancing the stability of transmission between structures, and ensuring normal and continuous operation of the device.

[0035] It is worth noting that the electric heating layer (2) heats the lithium carbonate slurry to maintain its temperature between 75°C and 85°C, and hot steam above the standard atmospheric pressure is discharged through the exhaust valve (1201). Compared with the relatively open structure of the traditional washing device, the present device adopts a relatively sealed washing barrel (1) and a top cover (12) in combination, which can appropriately reduce the heat loss. At the same time, the insulation cotton (610) is filled in the insulation chamber (608), which can also insulate the heat conducted into the heat storage chamber (604), thereby further reducing the heat loss. Among them, through the heat conduction structure of the insulation chamber (608), the heat conduction shaft (609) and the heat storage chamber (604) and the relatively closed space formed by the upper grinding disc (6) and the rolling groove (701), during the rolling and crushing process of the lithium carbonate polymer, the heat in the crushing area is relatively concentrated, and the replacement loss with the outside world is low. There is no need to consider the additional heat loss too much and deliberately increase the heating temperature of the device, thereby achieving the effect of reducing energy consumption, which is more conducive to the preparation and production of high-purity lithium carbonate by enterprises.

[0036] Embodiment 3

[0037] Based on the first embodiment, this embodiment makes further supplements, such as Figure 4-Figure 8 As shown, the tops of the multiple strip-shaped feed ports (603) opened on the top of the upper grinding disc (6) are fixedly connected with interception plates (8) and interception blocks (801), so that when the upper grinding disc (6) is rotating, the interception plates (8) will intercept the lithium carbonate polymer that hits it head-on, and the interception blocks (801) will intercept again at another angle after the interception by the interception plate (8) is successful, so as to prevent the lithium carbonate polymer from being thrown out of the range of the interception plate (8) under the centrifugal effect of the rotation of the interception plate (8), thereby increasing the interception effect on the lithium carbonate polymer, increasing the probability of the lithium carbonate polymer being intercepted and entering the strip-shaped feed ports (603) and the rolling groove (701), and further improving the rolling and crushing effect of the rolling shaft (602) on the lithium carbonate polymer.

[0038] Furthermore, a plurality of connecting blocks (11) are fixedly connected to the outer arc-shaped contour of the upper grinding disc (6), and each connecting block (11) is rotatably connected to a tilting block (1101) in a damping manner. By tightening the bolts, the damping size of the tilting block (1101) can be adjusted, and then the tilting angle of the tilting block (1101) in the connecting block (11) can be adjusted, so that the bottom of the tilting block (1101) can always be closely connected to the bottom of the inner wall of the washing bucket (1). In this way, when the connecting block (11) follows the rotation of the upper grinding disc (6), the tilting block (1101) can use the plane of its tilting angle to re-roll up the lithium carbonate polymer deposited on the bottom of the inner wall of the washing bucket (1), so that it can re-participate in the washing and crushing process of the lithium carbonate slurry, thereby improving the washing efficiency of the lithium carbonate in the lithium carbonate slurry.

[0039] In addition, a filter (901) is embedded in the top of the drain hole (9), which can achieve a filtering effect on lithium carbonate and impurities, thereby improving the purity of the finally collected lithium carbonate. At the same time, a sealing plug (902) is installed at the bottom of the filter (901), which can facilitate the subsequent cleaning of the inner wall of the washing bucket (1). The top of the sealing plug (902) is set lower than the bottom of the inner wall of the drain pipe (10), and the inner wall of the outer end of the drain pipe (10) is inclined toward the drain hole (9), which can also facilitate the collection of the filtered lithium carbonate particles.

[0040] Furthermore, the bottom of the tilting block (1101) is provided with bristles (1102) which are closely connected to the bottom of the inner wall of the washing bucket (1). The bristles (1102) can rotate synchronously with the tilting block (1101) and cooperate with the tilting block (1101) to roll up the precipitated lithium carbonate polymer. At the same time, the bristles (1102) can also brush the filter (901) embedded in the top of the drainage hole (9) during the rotation process, thereby achieving the effect of unblocking the filter (901) and avoiding the filter (901) from being blocked during long-term use.

[0041] In order to further improve the rolling effect of the sediment, as well as the magnetic impurities and metal impurities that may be mixed in the lithium carbonate slurry, a plurality of annularly arranged magnetic blocks (1103) are embedded and installed at the bottom of the inner wall of the washing barrel (1), and the positions of the magnetic blocks (1103) and the tilting blocks (1101) correspond to each other, and the manufacturing material of the tilting blocks (1101) is set to be a magnetic material, and the magnetic poles of the tilting blocks (1101) and the magnetic blocks (1103) are the same. Through the magnetism of the tilting blocks (1101) and the magnetic blocks (1103), and the rotation of the tilting blocks (1101), the metal impurities and magnetic impurities deposited around the lower grinding disc (7) can be adsorbed and collected to the greatest extent, so as to achieve the effect of removing such impurities, thereby further improving the device's impurity removal effect. The invention can achieve a good washing effect, and at the same time, when necessary, the damping between the magnetic block (1103) and the connecting block (11) is reduced by tightening bolts, so that the magnetic block (1103) can rotate freely on the connecting block (11), so that each time the tilting block (1101) rotates to the top of the magnetic block (1103), it will be repelled by the same magnetism on the magnetic block (1103) and jump upwards for a certain distance, and fall again under the influence of gravity after leaving the range, and finally the tilting block (1101) can fluctuate up and down regularly during the rotation process, further improving the rolling effect of the lithium carbonate polymer, and increasing the interception amount of the lithium carbonate polymer at the bottom of the washing bucket (1) by the interception plate (8) and the interception block (801), so that the precipitated lithium carbonate polymer can be evenly stirred and crushed.

[0042] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A washing device for preparing high-purity lithium carbonate, characterized in that: include: A washing bucket (1), wherein a plurality of supporting legs are fixedly connected to the bottom of the washing bucket (1), a top cover (12) for sealing is installed on the top of the washing bucket (1), and an exhaust valve (1201) and a feed pipe (1202) are respectively provided through the top cover (12); A motor (3), wherein the motor (3) is fixedly mounted on the top of the top cover (12), and an output shaft passes through the top cover (12) and is fixedly connected to a rotating rod (4), wherein a plurality of stirring rods (5) for stirring lithium carbonate slurry are fixedly mounted on the rotating rod (4); An upper grinding disc (6), wherein the center of the upper grinding disc (6) is fixedly connected to the bottom end of the rotating rod (4), a plurality of annularly distributed rotating grooves (601) are provided at the bottom of the upper grinding disc (6), and a rolling shaft (602) for rolling and crushing lithium carbonate polymer is rotatably connected in the rotating groove (601); A lower grinding disc (7), the lower grinding disc (7) being fixedly connected to the bottom of the inner wall of the washing barrel (1), and the lower grinding disc (7) being closely connected to the upper grinding disc (6), a rolling groove (701) being provided on the top of the lower grinding disc (7), and a groove for discharging crushed particles being provided on the rolling groove (701); A drainage hole (9) is provided at the bottom of the inner wall of the washing tub (1), and a drainage pipe (10) for discharging materials is connected through the bottom end.

2. A washing device for preparing high-purity lithium carbonate according to claim 1, characterized in that: The washing barrel (1) is provided with an annular cavity matching the contour thereof, and an electric heating layer (2) for heating lithium carbonate slurry is embedded in the annular cavity; the upper grinding disc (6) is provided with a heat storage cavity (604) connected to the plurality of rotating grooves (601); the rotating rod (4) is provided with a heat preservation cavity (608), and a heat conduction shaft (609) is coaxially arranged in the heat preservation cavity (608); the bottom end of the heat conduction shaft (609) passes through the upper grinding disc (6) and is fixedly connected to the heat storage cavity (604); the plurality of stirring rods (5) are positioned One end of the rotating rod (4) passes through the heat preservation cavity (608) and is connected to the surface of the heat conduction shaft (609). The piston in the rotating groove (601) is connected to a piston bar (605), and the piston bar (605) is located above the rolling shaft (602). The side of the piston bar (605) opposite to the rolling shaft (602) is fixedly connected to a brush sheet (606) that is compatible with the arc profile of the top of the rolling shaft (602). A plurality of springs (607) are fixedly connected between the top of the piston bar (605) and the inner wall of the heat storage cavity (604).

3. A washing device for preparing high-purity lithium carbonate according to claim 2, characterized in that: The insulation cavity (608) and the rotating rod (4) are filled with insulation cotton (610), and the (5) is made of a material with good thermal conductivity.

4. A washing device for preparing high-purity lithium carbonate according to claim 1, characterized in that: A filter screen (901) for filtering impurities and lithium carbonate particles is embedded in the top of the drainage hole (9), and the filter screen (901) is at the same horizontal plane as the bottom of the inner wall of the washing bucket (1). A sealing plug (902) for sealing is embedded in the bottom of the drainage hole (9), and the top of the sealing plug (902) is lower than the bottom of the inner wall of the drainage pipe (10).

5. A washing device for preparing high-purity lithium carbonate according to claim 1, characterized in that: The top of the upper grinding disc (6) is provided with a plurality of strip-shaped feed openings (603) distributed in a circular array, and the top of the strip-shaped feed opening (603) is fixedly connected with an interception plate (8) adapted to its length, and the upper half of the interception plate (8) is provided with a folded angle, and the inner wall of the folded angle is an obtuse angle toward the side of the strip-shaped feed opening (603).

6. A washing device for preparing high-purity lithium carbonate according to claim 5, characterized in that: An interception block (801) is fixedly connected to one end of the interception plate (8) away from the rotating rod (4), and the size of the interception block (801) is adapted to the size of the end of the strip-shaped feed port (603).

7. A washing device for preparing high-purity lithium carbonate according to claim 1, characterized in that: A plurality of connection blocks (11) distributed in an annular manner are fixedly connected to the outer arc-shaped contour of the upper grinding disc (6).

8. A washing device for preparing high-purity lithium carbonate according to claim 7, characterized in that: Brush bristles (1102) that fit in contact with the bottom of the inner wall of the washing bucket (1) are fixedly mounted on the bottom of the connecting block (11).

9. A washing device for preparing high-purity lithium carbonate according to claim 8, characterized in that: A plurality of magnetic blocks (1103) distributed in an annular pattern are embedded in the bottom of the washing tub (1), and the positions of the plurality of magnetic blocks (1103) correspond to those of the tilting block (1101).

10. A washing device for preparing high-purity lithium carbonate according to claim 9, characterized in that: The tilting block (1101) is made of magnetic material, and has the same magnetic pole as the magnetic block (1103).

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