Crushing device of lithium carbonate production line and production line applying same

Abstract

The invention relates to the technical field of lithium carbonate production, and provides a crushing device for a lithium carbonate production line, which comprises a crushing box, a first feeding pipe, a second feeding pipe and a discharging pipe, the first feeding pipe and the second feeding pipe are connected to the two sides of the crushing box correspondingly. The discharging pipe is connected to the bottom wall of the crushing box; the first feeding pipe is provided with a first conveying pump, and the first conveying pump is used for pressurizing and conveying materials to the crushing box; a stress plate is arranged in the crushing box, the plate face of the stress plate is located between the first feeding pipe and the second feeding pipe, and the stress plate is used for being impacted by materials. And the hardness of the stress plate is greater than that of the beta-type spodumene. The invention further provides a lithium carbonate production line, the lithium carbonate production line comprises a raw material pretreatment unit, a roasting conversion unit, a crushing unit, an acidification leaching unit, a solid-liquid separation unit, a carbonation synthesis unit and a drying packaging unit, and the lithium carbonate production line has the effect that the situation that gangue minerals are excessively crushed in the beta-type spodumene crushing process is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lithium carbonate production technology, in particular to a crushing device of a lithium carbonate production line and a production line applying the device. BACKGROUND

[0002] Lithium carbonate is an important chemical raw material, which has a wide range of applications in batteries, ceramics, glass, new energy and many other fields.

[0003] In the automatic production line of lithium carbonate, the crushing of beta-type spodumene is a key link. At present, the existing crushing of beta-type spodumene usually adopts the method of grinding and crushing. During crushing, the mixture of beta-type spodumene and gangue minerals is put into the grinding equipment, and through the movement and friction of the grinding medium, the ore particles are gradually reduced.

[0004] Since beta-type spodumene has the characteristics of brittle and fragile, and gangue minerals are relatively difficult to crush, if only selective crushing of beta-type spodumene is carried out during the crushing process, there will be obvious differences between beta-type spodumene and gangue minerals after crushing, which can provide strong conditions for the subsequent screening step.

[0005] However, using the existing crushing method of beta-type spodumene, there is an excessive crushing of gangue minerals during the process, which leads to the fact that the difference between beta-type spodumene and gangue minerals after crushing is not obvious, and cannot provide strong conditions for the subsequent screening step. SUMMARY

[0006] In order to reduce the excessive crushing of gangue minerals during the crushing of beta-type spodumene, the present application provides a crushing device of a lithium carbonate production line and a production line applying the device.

[0007] In one aspect, the present application provides a crushing device of a lithium carbonate production line.

[0008] The crushing device of a lithium carbonate production line provided by the present application adopts the following technical scheme: The application discloses a crushing device of a lithium carbonate production line, which comprises a crushing box, a first feeding pipe, a second feeding pipe and a discharging pipe; the first feeding pipe and the second feeding pipe are connected to two sides of the crushing box away from each other; the pipe cavity of the first feeding pipe and the pipe cavity of the second feeding pipe are communicated with the inner cavity of the crushing box; the discharging pipe is connected to the bottom wall of the crushing box, and the pipe cavity of the discharging pipe is communicated with the crushing box; the first feeding pipe is provided with a first conveying pump which is used for pressurizing and conveying materials to the crushing box; the second feeding pipe is provided with a second conveying pump which is used for pressurizing and conveying the materials to the crushing box; a stress plate is arranged in the crushing box, the plate surface of the stress plate is located between the first feeding pipe and the second feeding pipe, and the stress plate is used for impacting the materials; and the hardness of the stress plate is greater than that of beta spodumene.

[0009] By adopting the technical scheme, when the beta spodumene is crushed, the mixture (hereinafter referred to as mixed materials) of the beta spodumene and the gangue mineral in the first conveying pipe is pressurized and conveyed to the crushing box by the first conveying pump, and the mixed materials are impacted on one surface of the stress plate in the crushing box after being pressurized; the mixed materials in the second conveying pipe are pressurized and conveyed to the crushing box by the second conveying pump, and the mixed materials are impacted on the other surface of the stress plate in the crushing box after being pressurized. Since the hardness of the stress plate is greater than that of the beta spodumene, the beta spodumene can be crushed to a certain extent after being impacted on the stress plate. In addition, during the impacting process, the mixed materials form splashes at the stress plate, and the beta spodumene and the gangue mineral in the mixed materials are impacted, so that the beta spodumene is further crushed. During the above-mentioned impacting process, the speed of the mixed materials leaving the first conveying pipe and the second conveying pipe can be controlled by controlling the pressure of the first conveying pump and the second conveying pump, so that the impacting force of the mixed materials on the stress plate is controlled, the gangue mineral is not excessively crushed, and the beta spodumene is effectively crushed while the crushing of the gangue mineral is relatively moderate, so that a large difference between the beta spodumene and the gangue mineral is ensured, and the subsequent screening step is facilitated.

[0010] Optionally, two inner walls of the crushing box away from each other are provided with sliding grooves which are arranged in the height direction of the crushing box; the two sides of the stress plate away from each other are provided with sliding blocks, and the sliding grooves are used for sliding the sliding blocks; the sliding blocks are frictionally limited by the groove walls of the sliding grooves, and the length of the sliding grooves is longer than that of the sliding blocks.

[0011] Through the above technical scheme, in the process of impact, the stress plate vibrates, and because the sliding block and the groove wall of the sliding groove are frictionally limited, the stress plate gradually moves downward after vibration, so that the position of the stress plate impacted is changed with the impact, so that the damaged position of the stress plate is more evenly distributed, and the service life of the stress plate is prolonged.

[0012] Optionally, the lower surface of the sliding block is provided with a first limiting plate, and the first limiting plate is attached to the inner wall of the crushing box; a first through cavity for the first limiting plate to pass through is formed in the bottom wall of the crushing box, and a first space is defined between the first limiting plate, the groove wall of the sliding groove, the bottom wall of the sliding groove and the lower surface of the sliding block; a fluid is arranged in the first space, and the fluid is used to support the stress plate; the bottom wall of the sliding groove is provided with a first through port for the fluid to flow out, and when the stress plate vibrates, the fluid flows out from the first through port.

[0013] Optionally, the fluid is a liquid, a first capsule is arranged in the sliding groove, the first capsule is located in the first space, and the fluid is contained in the first capsule; the first capsule is provided with a flow pipe, and the flow pipe is externally connected with a second capsule; the second capsule is filled with the fluid, and the first capsule and the second capsule are both elastic.

[0014] Through the above technical scheme, in the process of impact, the stress plate vibrates, and because the sliding block and the groove wall of the sliding groove are frictionally limited, the stress plate gradually moves downward after vibration, so that the position of the stress plate impacted is changed with the impact, so that the damaged position of the stress plate is more evenly distributed, and the service life of the stress plate is prolonged.

[0015] Optionally, the upper surface of the stress plate is provided with a second limiting plate; a second through cavity for the second limiting plate to pass through is formed in the top wall of the crushing box, and the second limiting plate is attached to the inner wall of the crushing box; a second space is defined between the second limiting plate, the groove wall of the sliding groove, the top wall of the sliding groove and the upper surface of the sliding block; a second through port is formed in the top wall of the sliding groove, and the second through port is used for the flow pipe to pass through; the second capsule is arranged in the second space; the flow pipe is provided with a third delivery pump, and the third delivery pump is used to pressurize the liquid in the second capsule and deliver it into the first capsule.

[0016] Through the above technical scheme, in the process that the mixed material impacts the force receiving plate, the force receiving plate vibrates, the first capsule is pressed, the fluid in the first capsule flows to the second capsule, the first space becomes smaller, and the force receiving plate moves downwards, and the position of the force receiving plate impacted gradually changes. After the force receiving plate moves to the lowest position, the third conveying pump is started, part of the fluid in the second capsule is pressurized and conveyed to the first capsule by the third conveying pump, the fluid entering the first capsule supports the force receiving plate again, and the force receiving plate is reset.

[0017] Optionally, the fluid is quicksand, and the lower surface of the sliding block is provided with a disturbance rod, the disturbance rod is arranged in the first through port, and the outer diameter of the disturbance rod is smaller than the inner diameter of the first through port.

[0018] Through the above technical scheme, when the force receiving plate is static, the fluid is static, and the force receiving plate is supported. When the mixed material impacts the force receiving plate, the force receiving plate vibrates, the disturbance rod vibrates, the disturbance rod stirs the quicksand, the quicksand falls out of the first through port and falls into the collecting box, and as the quicksand flows out, the force receiving plate gradually descends, so that the position of the force receiving plate impacted changes as the impact proceeds.

[0019] Optionally, the crushing box is provided with a collecting box outside, and the collecting box is used for containing the fluid flowing out of the first through port.

[0020] Through the above technical scheme, the collecting box is used for containing the quicksand flowing out of the first space, which can avoid the quicksand from falling and can also reuse the quicksand.

[0021] Optionally, the crushing box is provided with a linear driving member, an output end of the linear driving member is used for abutting against the bottom wall of the force receiving plate, and a side wall of the crushing box is provided with an entrance, and the entrance is communicated with the sliding groove.

[0022] Through the above technical scheme, after the force receiving plate reaches the lowest position, the linear driving member is used to drive the force receiving plate to move upwards, so that the entrance is communicated with the outside, then the quicksand in the collecting box is poured into the entrance from the guide plate, so that the fluid returns to the first space. After the fluid is completely poured into the first space, the linear driving member is restarted, the output end of the linear driving member is reset, and the force receiving plate is also reset under the action of its own gravity.

[0023] On the other hand, the application provides a lithium carbonate production line, and the crushing device of the above lithium carbonate production line is applied.

[0024] The lithium carbonate production line comprises a raw material pretreatment unit, a roasting conversion unit, a crushing unit, an acid leaching unit, a solid-liquid separation unit, a carbonation synthesis unit and a drying and packaging unit; the raw material pretreatment unit is used for crushing and screening spodumene to a suitable particle size to meet the subsequent reaction requirements; the roasting conversion unit is used for roasting ores such as spodumene at high temperature, so that the crystal structure is changed from alpha type to beta type, thereby improving the leaching rate of lithium; the crushing unit is used for secondary crushing and screening of the mixture after roasting conversion, and the crushing unit comprises the crushing device; the acid leaching unit is used for reacting ores with acid liquor such as sulfuric acid to generate soluble lithium sulfate; the solid-liquid separation unit is used for separating the leaching liquid from the solid residue through filtering, centrifugal and other equipment; the carbonation synthesis unit is used for reacting the purified lithium sulfate solution with sodium carbonate to produce lithium carbonate precipitate; and the drying and packaging unit is used for washing, drying the lithium carbonate precipitate to obtain the final product, and packaging the final product.

[0025] In summary, the present application has at least one of the following beneficial technical effects: By arranging the force receiving plate, the first conveying pipe and the second conveying pipe in the crushing box, the mixture is crushed by impact principle, which has better crushing effect on beta spodumene and lower crushing degree of gangue minerals compared with the grinding crushing method. In addition, the impact force of the mixture on the force receiving plate can be controlled by controlling the pressure of the first conveying pump and the second conveying pump, so that the crushing degree of the gangue minerals is controlled within a moderate range. When the force receiving plate is impacted and vibrated, it moves downward, so that the position of the force receiving plate that is impacted changes with the impact, prolonging the service life of the force receiving plate. By arranging the fluid in the first space, the force receiving plate is supported, so that the connection and movement relationship between the force receiving plate and the crushing box is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a crushing device of a lithium carbonate production line in embodiment 1 of the present application.

[0027] Figure 2 FIG. 3 is a structural schematic diagram of a sliding block in embodiment 1.

[0028] Figure 3 FIG. 4 is a flow schematic diagram of a lithium carbonate production line in embodiment 1.

[0029] Figure 4 FIG. 6 is a structural schematic diagram of embodiment 2.

[0030] Figure 5 FIG. 8 is a structural schematic diagram of a dovetail groove and a dovetail convex strip in embodiment 2.

[0031] Figure 6 This is a schematic diagram used to illustrate the state of the force plate and the sliding block after they are connected in Embodiment 2.

[0032] Figure 7 This is a structural schematic diagram of Embodiment 3 of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Crushing box; 11. Sliding chute; 12. Box body; 13. Cover; 131. Main body; 132. Mounting part; 14. Linear drive component; 15. First through-cavity; 16. Second through-cavity; 17. First passage port; 18. Second passage port; 19. Inlet; 191. Guide plate; 2. First feed pipe; 21. First conveying pump; 3. Second feed pipe; 31. Second conveying pump; 4. Discharge pipe; 5. Force plate; 51. Sliding block; 511. Disturbance. 52. Rod; 52. First limiting plate; 521. First space; 53. Second limiting plate; 531. Second space; 54. Dovetail protrusion; 55. Dovetail groove; 6. First capsule; 61. Flow tube; 62. Second capsule; 63. Third delivery pump; 7. Collection box; 001. Raw material pretreatment unit; 002. Roasting and conversion unit; 003. Crushing unit; 004. Acidification and leaching unit; 005. Solid-liquid separation unit; 006. Carbonation and synthesis unit; 007. Drying and packaging unit. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0035] This application discloses a crushing device for a lithium carbonate production line and a production line using the device. Example 1

[0036] This embodiment discloses a crushing device for a lithium carbonate production line.

[0037] Reference Figure 1 A crushing device for a lithium carbonate production line includes a crushing box 1, a first feed pipe 2, a second feed pipe 3, and a discharge pipe 4.

[0038] The first feed pipe 2 and the second feed pipe 3 are respectively connected to the two opposite sides of the crushing box 1. The cavity of the first feed pipe 2 and the cavity of the second feed pipe 3 are both connected to the inner cavity of the crushing box 1. The discharge pipe 4 is connected to the bottom wall of the crushing box 1, and the cavity of the discharge pipe 4 is connected to the inner cavity of the crushing box 1.

[0039] The first feed pipe 2 is equipped with a first conveying pump 21, which is used to pressurize and convey the material to the crushing box 1. The second feed pipe 3 is equipped with a second conveying pump 31, which is used to pressurize and convey the material to the crushing box 1.

[0040] A force-bearing plate 5 is installed in the crushing chamber 1, located between the first feed pipe 2 and the second feed pipe 3. The force-bearing plate 5 is used for material impact. The hardness of the force-bearing plate 5 is greater than that of β-type spodumene.

[0041] When crushing β-spodumene, a mixture of β-spodumene and gangue minerals (hereinafter referred to as the mixture) in the first feed pipe 2 is pressurized and transported to the crushing chamber 1 by the first conveying pump 21. This mixture, after being pressurized, impacts one surface of the force plate 5 in the crushing chamber 1. Similarly, a mixture in the second feed pipe 3 is pressurized and transported to the crushing chamber 1 by the second conveying pump 31. This mixture, after being pressurized, impacts the other surface of the force plate 5 in the crushing chamber 1. Since the hardness of the force plate 5 is greater than that of β-spodumene, the β-spodumene can be partially crushed upon impact with the force plate 5. Furthermore, during the impact process, the mixture is splashed at the force plate 5, and the β-spodumene and gangue minerals in the mixture collide, further pulverizing the β-spodumene. Using this crushing structure, the mixture is crushed by impact. Compared to grinding crushing, this method achieves better crushing of β-spodumene while also providing a relatively moderate degree of crushing of the gangue minerals. Furthermore, during the aforementioned impact process, the speed at which the mixture leaves the first feed pipe 2 and the second feed pipe 3 can be controlled by adjusting the pressure of the first conveying pump 21 and the second conveying pump 31. This controls the impact force between the mixture and the force plate 5, preventing the gangue minerals from being excessively crushed. Consequently, while effectively crushing β-spodumene, the crushing of gangue minerals is also relatively moderate, ensuring that there is still a significant difference between β-spodumene and gangue minerals, which facilitates subsequent screening steps.

[0042] Reference Figure 2 Specifically, sliding grooves 11 are provided on the two mutually distant inner walls of the crushing chamber 1, extending along the height direction of the crushing chamber 1. Sliding blocks 51 are fixed to both mutually distant sides of the force-bearing plates 5, and the sliding grooves 11 are used for the sliding blocks 51 to slide. The sliding blocks 51 are in close contact with the groove wall of the sliding groove 11, with friction limiting between the sliding blocks 51 and the groove wall. The length of the sliding groove 11 is longer than the length of the sliding blocks 51. With this design, during impact, the force-bearing plates 5 vibrate. Because of the friction limiting between the sliding blocks 51 and the groove wall of the sliding groove 11, the force-bearing plates 5 gradually move downwards after vibration. This changes the impact position of the force-bearing plates 5 as the impact continues, allowing for a more uniform distribution of force on the force-bearing plates 5 and extending their service life.

[0043] Furthermore, a linear drive unit 14 is installed on the bottom wall of the crushing box 1. The output end of the linear drive unit 14 is positioned upwards, and the lower surface of the force plate 5 abuts against the output end of the linear drive unit 14. When the force plate 5 moves to its lowest position, the lower surface of the force plate 5 abuts against the output shaft of the linear drive unit 14. At this time, the linear drive unit 14 is activated, and the linear drive unit 14 applies upward force to the force plate 5, pushing the force plate 5 back to its original position, thereby resetting the force plate 5.

[0044] The linear drive component 14 can be a pneumatic cylinder, a hydraulic cylinder, or other structures that can achieve linear drive.

[0045] Furthermore, in this embodiment, the crushing box 1 includes a box body 12 and a cover 13, and the cover 13 is detachably connected to the box body 12 by multiple bolts. A sliding groove 11 is formed in the inner wall of the box body 12, and the upper end of the sliding groove 11 penetrates the upper surface of the box body 12, so as to facilitate the removal of the sliding block 51 from the sliding groove 11, thereby facilitating the replacement of the force plate 5.

[0046] This embodiment also discloses a lithium carbonate production line, which uses the crushing device of the above-mentioned lithium carbonate production line.

[0047] Reference Figure 3 A lithium carbonate production line includes a raw material pretreatment unit 001, a roasting and conversion unit 002, a crushing unit 003, an acidification and leaching unit 004, a solid-liquid separation unit 005, a carbonation and synthesis unit 006, and a drying and packaging unit 007.

[0048] The raw material pretreatment unit 001 is used to crush and screen spodumene to a suitable particle size to meet the requirements of subsequent reactions. The roasting and conversion unit 002 is used to roast spodumene and other ores at high temperatures, transforming the crystal structure from α-type to β-type, thereby increasing the lithium leaching rate. The crushing unit 003 is used to perform secondary crushing and screening of the roasted and converted mixture; the crushing unit 003 includes the aforementioned crushing device. The acid leaching unit 004 is used to react the ore with sulfuric acid or other acids to generate soluble lithium sulfate. The solid-liquid separation unit 005 is used to separate the leaching liquid from the solid residue using equipment such as filtration and centrifugation. The carbonation synthesis unit 006 is used to react the purified lithium sulfate solution with sodium carbonate to produce lithium carbonate precipitate. The drying and packaging unit 007 is used to wash and dry the lithium carbonate precipitate to obtain the final product and then package it.

[0049] The implementation principle of Example 1 is as follows: When crushing β-type spodumene, the mixture of β-type spodumene and gangue minerals (hereinafter referred to as the mixture) in the first feed pipe 2 is pressurized and transported to the crushing box 1 by the first conveying pump 21. After being pressurized, these materials impact one surface of the force plate 5 in the crushing box 1. The mixture in the second feed pipe 3 is pressurized and transported to the crushing box 1 by the second conveying pump 31. After being pressurized, these materials impact the other surface of the force plate 5 in the crushing box 1. After impacting the force plate 5, the mixture falls into the discharge pipe 4 and enters the next station from the discharge pipe 4.

[0050] During the crushing process described above, the force plate 5 vibrates. Since the sliding block 51 and the wall of the sliding groove 11 are frictionally limited, the force plate 5 will gradually move downward after vibration. As the impact continues, the position of the force plate 5 being impacted will change, so that the damaged position of the force plate 5 can be distributed more evenly, thus extending the service life of the force plate 5. Example 2

[0051] Reference Figure 4 The difference between this embodiment and embodiment 1 is that no linear drive component is provided in the crushing box 1.

[0052] A first limiting plate 52 is provided on the lower surface of the sliding block 51, and the first limiting plate 52 is attached to the inner wall of the crushing box 1. A first through cavity 15 is provided through the bottom wall of the crushing box 1 for the first limiting plate 52 to pass through. A first space 521 is defined between the first limiting plate 52, the groove wall of the sliding groove 11, the bottom wall of the sliding groove 11, and the lower surface of the sliding block 51. Fluid is provided in the first space 521 to support the force plate 5. A first through port 17 is provided through the bottom wall of the sliding groove 11 for the fluid to flow out. When the force plate 5 vibrates, the fluid flows out from the first through port 17.

[0053] A second limiting plate 53 is provided on the upper surface of the sliding block 51. The cover 13 of the crushing box 1 has a second through cavity 16 for the second limiting plate 53 to pass through. The second limiting plate 53 is attached to the inner wall of the crushing box 1. A second space 531 is defined between the second limiting plate 53, the top wall of the sliding groove 11 (i.e. the lower surface of the cover 13), and the upper surface of the sliding block 51.

[0054] The first limiting plate 52 is integrally formed or welded to the sliding block 51, and the plate surface of the first limiting plate 52 is attached to the cavity wall of the first through cavity 15; the second limiting plate 53 is integrally formed or welded to the sliding block 51, and the plate surface of the second limiting plate 53 is attached to the cavity wall of the second through cavity 16.

[0055] Specifically, in this embodiment, the fluid is a liquid, which can be water or oil. A first capsule 6 is provided in the sliding groove 11, and the first capsule 6 is located in the first space 521, where the fluid is contained.

[0056] The first capsule 6 is connected to a flow tube 61, the lumen of which communicates with the inner cavity of the first capsule 6. The flow tube 61 extends out of the first through-hole 17 and enters the second space 531 through the second through-hole 18. The end of the flow tube 61 away from the first capsule 6 is connected to a second capsule 62, the lumen of which communicates with the inner cavity of the second capsule 62. The second capsule 62 is disposed in the second space 531 and is filled with fluid. Both the first capsule 6 and the second capsule 62 are elastic.

[0057] Furthermore, a third delivery pump 63 is provided around the circulation tube 61. The third delivery pump 63 is used to pressurize and deliver the liquid in the second capsule 62 to the first capsule 6.

[0058] During the impact of the mixture on the force-bearing plate 5, the force-bearing plate 5 vibrates, putting pressure on the first bladder 6. The fluid in the first bladder 6 flows into the second bladder 62, the first space 521 shrinks, and the force-bearing plate 5 moves downward, gradually changing the position of the force-bearing plate 5. After the force-bearing plate 5 moves to its lowest position, the third delivery pump 63 is activated. The third delivery pump 63 pressurizes and delivers some of the fluid in the second bladder 62 into the first bladder 6. The fluid entering the first bladder 6 then supports the force-bearing plate 5 again, achieving the reset of the force-bearing plate 5.

[0059] Furthermore, to facilitate the replacement of the force plate 5, in this embodiment, the force plate 5 and the sliding block 51 are detachably connected.

[0060] Reference Figure 5 and Figure 6 Specifically, the sliding block 51 has a dovetail rib 54 integrally formed on the surface near the force plate 5, and the dovetail rib 54 extends along the height direction of the crushing box 1. Both sides of the force plate 5 have dovetail grooves 55, which extend along the height direction of the force plate 5, and the lower end of the dovetail groove 55 penetrates the lower surface of the force plate 5. When installing the force plate 5, it is vertically inserted into the crushing box 1, so that the dovetail rib 54 is inserted into the dovetail groove 55, until the upper surface of the dovetail rib 54 abuts against the upper wall of the dovetail groove 55.

[0061] Furthermore, the cover 13 includes a main body 131 and mounting portions 132 disposed on both sides of the main body 131. The mounting portions 132 are detachably connected to the housing 12 by bolts, and the main body 131 is detachably connected to the housing 12 by bolts. The second passage 18 and the second through cavity 16 are both opened in the mounting portion 132.

[0062] The implementation principle of Example 2 is as follows: During the impact of the mixed materials on the force-bearing plate 5, the force-bearing plate 5 vibrates, putting pressure on the first bladder 6. The fluid in the first bladder 6 flows into the second bladder 62, the first space 521 becomes smaller, the force-bearing plate 5 moves downward, and the position of the force-bearing plate 5 being impacted gradually changes. After the force-bearing plate 5 moves to the lowest position, the third delivery pump 63 is started. The third delivery pump 63 pressurizes and delivers part of the fluid in the second bladder 62 to the first bladder 6. The fluid entering the first bladder 6 uses the fluid to support the force-bearing plate 5 again, realizing the reset of the force-bearing plate 5. Example 3

[0063] Reference Figure 7 The difference between this embodiment and Embodiment 1 is that a first limiting plate 52 is provided on the lower surface of the sliding block 51, and the first limiting plate 52 is attached to the inner wall of the crushing box 1. A first through cavity 15 is provided through the bottom wall of the crushing box 1 for the first limiting plate 52 to pass through. A first space 521 is defined between the first limiting plate 52, the groove wall of the sliding groove 11, the bottom wall of the sliding groove 11, and the lower surface of the sliding block 51. Fluid is provided in the first space 521, and the fluid is used to support the force plate 5. A first through port 17 is provided through the bottom wall of the sliding groove 11 for the fluid to flow out. When the force plate 5 vibrates, the fluid flows out from the first through port 17.

[0064] In this embodiment, the fluid is quicksand. A disturbance rod 511 is fixed to the lower surface of the sliding block 51 by bolts. The disturbance rod 511 passes through the first passage 17, and the outer diameter of the disturbance rod 511 is smaller than the inner diameter of the first passage 17.

[0065] A collection box 7 is provided outside the crushing chamber 1 to hold the fluid flowing out from the first through port 17. In this embodiment, the collection box 7 is installed on the discharge pipe 4, and an inlet 19 is provided through the side wall of the crushing chamber 1, which communicates with the sliding groove 11. A guide plate 191 is provided on the outer wall of the crushing chamber 1 at the position of the inlet 19. The guide plate 191 is inclined, and baffles are provided on both sides of the guide plate 191.

[0066] The implementation principle of Example 3 is as follows: When the force plate 5 is stationary, the fluid is stationary and provides support for the force plate 5. When the mixed material impacts the force plate 5, the force plate 5 vibrates, which drives the disturbance rod 511 to vibrate. The disturbance rod 511 loosens the quicksand, causing the quicksand to fall out from the first through-hole 17 and into the collection box 7. As the quicksand flows out, the force plate 5 gradually descends.

[0067] After the force plate 5 reaches its lowest position, the linear drive 14 drives the force plate 5 to move upward, connecting the inlet 19 to the outside. Then, the quicksand in the collection box 7 is poured into the inlet 19 through the guide plate 191, allowing the fluid to return to the first space 521. After all the fluid has been poured into the first space 521, the linear drive 14 is restarted, resetting its output end, and the force plate 5 also resets under its own gravity.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A crushing device for a lithium carbonate production line, characterized in that: It includes a crushing box (1), a first feed pipe (2), a second feed pipe (3), and a discharge pipe (4); the first feed pipe (2) and the second feed pipe (3) are respectively connected to the two sides of the crushing box (1) that are far apart from each other; the cavity of the first feed pipe (2) and the cavity of the second feed pipe (3) are both connected to the inner cavity of the crushing box (1); the discharge pipe (4) is connected to the bottom wall of the crushing box (1), and the cavity of the discharge pipe (4) is connected to the crushing box (1); The first feed pipe (2) is equipped with a first conveying pump (21), which is used to pressurize and convey the material to the crushing box (1); the second feed pipe (3) is equipped with a second conveying pump (31), which is used to pressurize and convey the material to the crushing box (1). The crushing box (1) is provided with a force plate (5), which is located between the first feed pipe (2) and the second feed pipe (3). The force plate (5) is used for the material to impact. The hardness of the force plate (5) is greater than that of β-type spodumene.

2. The crushing device for a lithium carbonate production line according to claim 1, characterized in that: The crushing box (1) has two mutually distant inner walls with sliding grooves (11) extending along the height direction of the crushing box (1); the force plate (5) has sliding blocks (51) on both mutually distant sides, and the sliding grooves (11) are used for the sliding blocks (51) to slide; the sliding blocks (51) are frictionally limited with the groove wall of the sliding groove (11), and the length of the sliding groove (11) is longer than the length of the sliding block (51).

3. The crushing device for a lithium carbonate production line according to claim 2, characterized in that: The lower surface of the sliding block (51) is provided with a first limiting plate (52), which is attached to the inner wall of the crushing box (1). The bottom wall of the crushing box (1) is provided with a first through cavity (15) for the first limiting plate (52) to pass through. The first limiting plate (52), the groove wall of the sliding groove (11), the bottom wall of the sliding groove (11), and the lower surface of the sliding block (51) define a first space (521). The first space (521) is provided with fluid, which is used to support the force plate (5). The bottom wall of the sliding groove (11) is provided with a first through port (17) for the fluid to flow out. When the force plate (5) vibrates, the fluid flows out from the first through port (17).

4. The crushing device for a lithium carbonate production line according to claim 3, characterized in that: The fluid is a liquid. A first capsule (6) is provided in the sliding groove (11). The first capsule (6) is located in the first space (521). The fluid is contained in the first capsule (6). The first capsule (6) is provided with a flow tube (61). A second capsule (62) is connected to the outside of the flow tube (61). The second capsule (62) is filled with the fluid. Both the first capsule (6) and the second capsule (62) are elastic.

5. The crushing device for a lithium carbonate production line according to claim 4, characterized in that: The upper surface of the force plate (5) is provided with a second limiting plate (53); the top wall of the crushing box (1) is provided with a second through cavity (16) for the second limiting plate (53) to pass through, the second limiting plate (53) is attached to the inner wall of the crushing box (1), and a second space (531) is defined between the second limiting plate (53), the groove wall of the sliding groove (11), the top wall of the sliding groove (11) and the upper surface of the sliding block (51); the top wall of the sliding groove (11) is provided with a second through port (18), the second through port (18) is used for the passage of the flow pipe (61); the second bladder (62) is provided in the second space (531); the flow pipe (61) is provided with a third delivery pump (63), the third delivery pump (63) is used to pressurize and deliver the liquid in the second bladder (62) to the first bladder (6).

6. The crushing device for a lithium carbonate production line according to claim 3, characterized in that: The fluid is quicksand. A disturbance rod (511) is provided on the lower surface of the sliding block (51). The disturbance rod (511) passes through the first passage (17). The outer diameter of the disturbance rod (511) is smaller than the inner diameter of the first passage (17).

7. The crushing device for a lithium carbonate production line according to claim 6, characterized in that: A collection box (7) is provided outside the crushing box (1), the collection box (7) being used to hold the fluid flowing out from the first through port (17).

8. The crushing device for a lithium carbonate production line according to claim 7, characterized in that: The crushing box (1) is provided with a linear drive (14), the output end of which is used for the bottom wall of the force plate (5) to abut; the side wall of the crushing box (1) is provided with an inlet (19), which is connected to the sliding groove (11).

9. A lithium carbonate production line, employing a crushing device according to any one of claims 1-9, characterized in that: The system includes a raw material pretreatment unit (001), a roasting and conversion unit (002), a crushing unit (003), an acidification and leaching unit (004), a solid-liquid separation unit (005), a carbonation and synthesis unit (006), and a drying and packaging unit (007). The raw material pretreatment unit (001) is used to crush and screen spodumene to a suitable particle size to meet the requirements of subsequent reactions. The roasting and conversion unit (002) is used to roast spodumene and other ores at high temperatures, transforming the crystal structure from α-type to β-type, thereby increasing the lithium leaching rate. The crushing unit (003) is used to process the roasted spodumene. The converted mixture is subjected to secondary crushing and screening. The crushing unit (003) includes the crushing device mentioned above. The acid leaching unit (004) is used to react the ore with acidic liquids such as sulfuric acid to generate soluble lithium sulfate. The solid-liquid separation unit (005) is used to separate the leaching liquid from the solid residue through equipment such as filtration and centrifugation. The carbonation synthesis unit (006) is used to react the purified lithium sulfate solution with sodium carbonate to produce lithium carbonate precipitate. The drying and packaging unit (007) is used to wash and dry the lithium carbonate precipitate to obtain the final product and package the final product.

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