Lithium carbonate production equipment and production process thereof

Abstract

The invention relates to the technical field of lithium carbonate production, and provides lithium carbonate production equipment and a production process thereof.The lithium carbonate production equipment comprises a crusher, a mixing bin and a calcining kiln which are sequentially arranged, a discharging hopper is arranged at the bottom of the crusher, and a receiving hopper truck is arranged at the bottom of the discharging hopper; the outer side of the discharging hopper is sleeved with an isolation cloth sleeve, a plurality of hanging rings are arranged at the free end of the isolation cloth sleeve, a butt joint ring is arranged on the outer side of the receiving hopper truck, and a plurality of hanging rods for hanging the hanging rings are arranged at the bottom of the butt joint ring; when the hanging ring is hung on the hanging rod, the outer side wall of the butt joint ring abuts against the inner surface of the isolation cloth sleeve. The lithium carbonate production equipment provided by the invention can reduce flying dust pollution.

Description

Technical Field

[0001] This application relates to the technical field of lithium carbonate production, and in particular to a lithium carbonate production equipment and its production process. Background Technology

[0002] Lithium mica is a lithium-containing mica mineral, usually occurring as tabular, flaky, or scaly crystals with a vitreous or pearly luster. It comes in a variety of colors, commonly light purple or pink. It exists in nature as a solid and is one of the important mineral raw materials for lithium extraction.

[0003] Currently, lithium carbonate production processes mainly include three technical routes: the first is the sulfuric acid method, which involves roasting lepidolite with concentrated sulfuric acid followed by water leaching for extraction; the second is the limestone roasting method, which uses calcium carbonate to react with lepidolite at high temperatures to generate soluble lithium salts; and the third is the chlorination roasting method, which adds calcium chloride to promote lithium volatilization and recovery. Regardless of the method, the lepidolite raw material needs to be crushed using a crusher in the initial stage to improve the lithium carbonate extraction rate. However, in actual operation, the crushing of lepidolite raw material generates significant dust, which not only wastes the lepidolite raw material but also pollutes the environment, negatively impacting the health of on-site operators. Therefore, further improvements are needed. Summary of the Invention

[0004] To reduce dust pollution, this application provides a lithium carbonate production equipment and its production process.

[0005] Firstly, the lithium carbonate production equipment provided in this application adopts the following technical solution: A lithium carbonate production device includes a crusher, a mixing silo, and a roasting kiln arranged in sequence. The crusher has a discharge hopper at its bottom, and a receiving hopper cart is provided at the bottom of the discharge hopper. An isolation cloth sleeve is fitted on the outside of the discharge hopper, and multiple hanging rings are provided at the free end of the isolation cloth sleeve. A docking ring is provided on the outside of the receiving hopper cart, and multiple hanging rods are provided at the bottom of the docking ring for hanging the hanging ring. When the hanging ring is attached to the hanging rod, the outer wall of the docking ring abuts against the inner surface of the isolation cloth sleeve.

[0006] By adopting the above technical solution, after the crusher crushes the lepidolite, the material falls from the discharge hopper into the receiving hopper car. An isolation cloth cover is installed at the outlet end of the discharge hopper to reduce dust emissions, thereby lowering dust pollution to the surrounding environment and improving the on-site working environment. Furthermore, the design of the connecting ring allows the isolation cloth cover to be hooked onto the connecting rod via the hook ring. The portion of the isolation cloth cover at the connecting ring forms an angle, abutting against the outer wall of the connecting ring, improving the sealing effect between the isolation cloth cover and the receiving hopper car, further reducing dust pollution.

[0007] Optionally, the crusher has a crushing chamber inside, a rotating disk is rotatably installed inside the crushing chamber, and multiple crushing hammers are rotatably installed on the surface of the rotating disk. The multiple crushing hammers are arranged at intervals around the central axis of the rotating disk. The crusher is provided with a first drive assembly for driving the rotating disk to rotate. A discharge channel is provided at the bottom of the crushing chamber, and a discharge hopper is connected to the discharge channel. A screening frame is provided in the discharge channel, and the screening frame has multiple screening channels.

[0008] By adopting the above technical solution, when the raw material is fed into the crushing chamber of the crusher, the first drive component forces the rotating disk to rotate, causing multiple crushing hammers to rotate around the central axis of the rotating disk to crush the lepidolite raw material. In addition, a screening frame is set in the discharge channel. After crushing, the lepidolite raw material that meets the particle size requirements falls downward through the screening channel, while the larger-sized lepidolite raw material remains in the crushing chamber for further crushing, improving the crushing effect of the lepidolite raw material.

[0009] Optionally, two extrusion plates are slidably installed inside the discharge hopper, and extrusion channels are formed between the extrusion plates and the inner wall of the discharge hopper, as well as between the two extrusion plates; the crusher is provided with a second drive assembly, which is used to drive the two extrusion plates to reciprocate to move closer to each other or further away from each other.

[0010] By adopting the above technical solution, the crushed lepidolite raw material falls into the extrusion channel formed by the extrusion plates through the screening channel. The second drive component forces the two extrusion plates to reciprocate, moving closer or further apart, to crush the lepidolite raw material within the extrusion channel, further improving the crushing effect. Furthermore, by setting two extrusion plates, multiple extrusion channels are formed. When one extrusion channel shrinks, the adjacent extrusion channel expands; the effect is that at least one extrusion channel is in an expanded state, facilitating the continuous flow of lepidolite raw material and reducing the possibility of blockage in the discharge channel.

[0011] Optionally, the second drive assembly includes a drive bar, a drive disc, and a drive component. There are two drive bars, each connected to a different extrusion plate, and each drive bar has a push groove. The drive disc is rotatably connected to the discharge hopper. There are two drive discs, each corresponding to one of the two drive bars. Each drive disc has an eccentric post on its surface, which is embedded in the push groove of the corresponding drive bar. The drive component is located in the discharge hopper and is used to drive the two drive discs to rotate, with the two drive discs rotating in opposite directions.

[0012] By adopting the above technical solution, the driving component drives two driving disks to rotate, and the driving component forces the two driving disks to rotate in opposite directions. With the cooperation of the eccentric column and the pushing groove of the driving bar, the two extrusion plates reciprocate and slide. As the two driving disks continue to rotate, the two extrusion plates reciprocate to move closer or further away from each other, thereby continuously extruding the lithium mica raw material falling into the extrusion channel.

[0013] Optionally, the surface of the rotating disk is provided with multiple connecting posts, which are correspondingly arranged with multiple breaker hammers, and each breaker hammer is hinged to the corresponding connecting post; a connecting ring is provided inside the crushing chamber, and the connecting ring is provided with multiple connecting rods, which are correspondingly arranged with multiple breaker hammers, with one end of the connecting rod hinged to the connecting ring and the other end hinged to the corresponding breaker hammer; a return spring is connected between each breaker hammer and the rotating disk.

[0014] By adopting the above technical solution, the hydraulic breaker is hinged to the rotating disk via a connecting column, allowing the breaker to rotate around the connecting column. When the rotating disk drives the breaker to impact and crush the lepidolite material, the breaker can rotate around the connecting column at a certain angle to dissipate some of the reverse impact force from the lepidolite material, thereby reducing the possibility of a large amount of reverse impact force acting on the rotating disk. Furthermore, the connecting ring connects all the hydraulic breakers in series via multiple connecting rods. When one breaker impacts the lepidolite material, the reverse impact force it experiences can be distributed to all the breakerers through the connecting ring, improving the force dissipation effect and enhancing the overall structural stability.

[0015] Optionally, the screening frame includes multiple fixed screen bars and multiple movable screen bars. The multiple fixed screen bars are spaced apart at the inlet end of the discharge channel, and an active area is formed between two adjacent fixed screen bars. The multiple movable screen bars are correspondingly arranged with multiple active areas, and each movable screen bar is slidably arranged in the corresponding active area. The screening channel is formed between the fixed screen bars and the adjacent movable screen bars. The crusher is equipped with a lifting component for driving the movable screen bars to reciprocate and lift.

[0016] By adopting the above technical solution, after the lepidolite raw material is crushed, it falls onto the screen frame. The crushed lepidolite raw material that meets the particle size requirements falls downwards through the screen channel, while larger lepidolite raw material remains in the crushing chamber for further crushing due to the obstruction of the fixed and movable screen bars. During this process, the movable screen bars are forced to reciprocate upwards and downwards by the lifting assembly to disturb the lepidolite raw material on the screen frame, reducing the possibility of the screen channel becoming blocked.

[0017] Optionally, a connecting bar connects multiple movable screen bars, and the multiple movable screen bars are connected in series through the connecting bar; the lifting assembly includes a pull rod and a roller, one end of the pull rod is connected to the connecting bar, and the roller is rotatably installed at the end of the pull rod away from the connecting bar. The surface of the connecting ring has a rotating slide, which is annular around the central axis of the connecting ring, and the roller is rolled and embedded in the rotating slide.

[0018] By employing the above technical solution, the rotating disc drives the breaker hammer to impact and crush the lepidolite raw material. The breaker hammer swings back under the reverse impact force from the lepidolite raw material, thereby pulling the connecting ring via the connecting rod. The connecting ring, through the inner circumference of the rotating slide, pulls the rolling wheel of the pull rod, which in turn pulls the connecting bar, forcing multiple movable screen bars to rise, thus disturbing the lepidolite raw material located on the screen frame. With the continuous rotation of the rotating disc, the movable screen bars reciprocate, reducing the possibility of blockage in the screen channel.

[0019] Optionally, the fixed screen bar has a first extrusion surface on each of its two opposite sidewalls, and the distance between the two first extrusion surfaces gradually decreases from bottom to top; the movable screen bar has a second extrusion surface on each of its two opposite sidewalls, and the distance between the two second extrusion surfaces gradually decreases from top to bottom.

[0020] By adopting the above technical solution, during the reciprocating lifting and lowering process of the movable screen bar, the first extrusion surface and the second extrusion surface form an extrusion fit to extrude the lithium mica raw material passing through the screen channel, so as to further improve the crushing effect of the lithium mica raw material.

[0021] Optionally, the top of the movable screen bar is provided with a guide surface, and two second extrusion surfaces are respectively connected to both sides of the guide surface. The height of the guide surface gradually decreases from the middle position to both sides.

[0022] By adopting the above technical solution, the lithium mica raw material is crushed by the breaker hammer and falls onto the screen frame. The movable screen bar is equipped with a guide surface, which allows the lithium mica raw material to slide down the screen channel under the guidance of the guide surface, so as to discharge the crushed lithium mica raw material in time and reduce the possibility of a large amount of lithium mica raw material remaining on the screen frame.

[0023] Secondly, the lithium carbonate production process provided in this application adopts the following technical solution: A lithium carbonate production process specifically includes the following steps: S1, crushing: crushing lepidolite raw material; S2, mixing: stirring the raw material and auxiliary materials to obtain a mixture; S3, calcining: calcining the mixture.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By using an isolation cloth cover, after the crusher crushes the lepidolite, the material falls from the discharge hopper into the receiving hopper car. The isolation cloth cover at the outlet end of the discharge hopper reduces dust emissions, minimizing pollution to the surrounding environment and improving the working conditions. Furthermore, the connecting ring design allows the isolation cloth cover to be attached to the connecting rod via the connecting ring. The angle formed by the isolation cloth cover at the connecting ring abuts against the outer wall of the connecting ring, improving the sealing effect between the isolation cloth cover and the receiving hopper car, further reducing dust pollution. 2. Through the connecting ring, the hydraulic breaker is hinged to the rotating disk via a connecting column, allowing the hydraulic breaker to rotate around the connecting column. When the rotating disk drives the hydraulic breaker to impact and crush the lepidolite material, the hydraulic breaker can rotate around the connecting column at a certain angle to dissipate some of the reverse impact force from the lepidolite material, thereby reducing the possibility of a large amount of reverse impact force acting on the rotating disk. Furthermore, the connecting ring connects all the hydraulic breakers in series via multiple connecting rods. When one hydraulic breaker impacts the lepidolite material, the reverse impact force it experiences can be distributed to all the hydraulic breakers through the connecting ring, improving the reverse impact force dissipation effect and enhancing the overall structural stability. 3. Through the arrangement of the pull rod and rolling wheels, the rotating disc drives the breaker hammer to impact and crush the lepidolite raw material. The breaker hammer, under the reverse impact force from the lepidolite raw material, swings back, thereby pulling the connecting ring via the connecting rod. The connecting ring, through the inner circumference of the rotating slide, pulls the rolling wheel of the pull rod, which in turn pulls the connecting bar, forcing multiple movable screen bars to rise, thus disturbing the lepidolite raw material located on the screen frame. With the continuous rotation of the rotating disc, the movable screen bars reciprocate, reducing the possibility of blockage in the screen channel. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a partial cross-sectional view of the rotating disk in Embodiment 1; Figure 3 This is a partial cross-sectional view of the hydraulic breaker in Example 1; Figure 4 This is a partial sectional view of Embodiment 1 showing the hook ring and hook rod; Figure 5 This is a partial cross-sectional view of the extrusion plate in Example 2; Figure 6 This is a schematic diagram illustrating the structure of the second motor in Embodiment 2; Figure 7 This is a partial cross-sectional view of the drive disk in Embodiment 2; Figure 8 This is a partial cross-sectional view of the connecting ring in Embodiment 3; Figure 9This is a partial cross-sectional view of Embodiment 4, showing the fixed screen bars and the movable screen bars; Figure 10 This is a schematic diagram illustrating the structure of the first extrusion surface and the second extrusion surface in Example 4; Figure 11 This is a partial cross-sectional view of the pull rod and the roller in Example 5.

[0026] Explanation of reference numerals in the attached drawings: 1. Crusher; 11. Crushing chamber; 12. Discharge channel; 13. Connecting ring; 131. Rotating slide; 132. Rotating ring; 14. Connecting rod; 15. Return spring; 16. Rotating shaft; 17. Feed hopper; 18. Baffle; 2. Discharge hopper; 21. Isolation cloth cover; 211. Hanging ring; 22. Extrusion plate; 221. Extrusion channel; 222. Sliding rod; 23. Slide rail; 24. Connecting frame; 3. Receiving hopper cart; 31. Connecting ring; 311. Hanging rod; 4. Rotating disc; 41. Crusher hammer; 42. Connecting column; 5. First drive. Components; 51. First motor; 52. Belt; 6. Screen frame; 61. Screening channel; 62. Fixed screen bar; 621. First extrusion surface; 622. Clearance groove; 63. Movable screen bar; 631. Second extrusion surface; 632. Guide surface; 64. Connecting bar; 65. Mounting frame; 66. Screening mesh plate; 7. Second drive assembly; 71. Drive bar; 711. Push groove; 72. Drive disc; 721. Eccentric column; 73. Second motor; 74. Drive gear; 8. Lifting assembly; 81. Tie rod; 82. Roller; 83. Lifting cylinder; 9. Mounting frame. Detailed Implementation

[0027] The following combination Figures 1-11 This application will be described in further detail. Example 1

[0028] This application discloses a lithium carbonate production equipment.

[0029] Reference Figure 1 , Figure 2 A lithium carbonate production equipment includes a crusher 1, a mixing bin, and a calcining kiln arranged in sequence. The crusher 1 is used to crush lepidolite raw material; the mixing bin is used to mix the crushed lepidolite with auxiliary materials (such as calcium sulfate, sodium sulfate, potassium sulfate, calcium carbonate, calcium oxide, etc.) to obtain a mixture; the calcining kiln is used to calcine the mixture (the mixing bin and the calcining kiln are existing technology structures, and their structures will not be described in detail here, nor are they shown in the figure).

[0030] Reference Figure 2 , Figure 3The crusher 1 has a crushing chamber 11 inside, and a rotating shaft 16 is rotatably installed inside the crushing chamber 11. A rotating disk 4 is fixedly installed on the outer peripheral wall of the rotating shaft 16. In this embodiment, multiple rotating disks 4 are spaced apart along the axial direction of the rotating shaft 16. Multiple connecting columns 42 are fixedly installed on the surface of each rotating disk 4. The multiple connecting columns 42 are arranged at intervals around the central axis of the rotating disk 4. Each connecting column 42 is hinged to a breaker hammer 41. The breaker hammer 41 is hinged to the rotating disk 4 through the connecting column 42. It should be noted that the multiple breaker hammers 41 of two adjacent rotating disks 4 are staggered.

[0031] Reference Figure 1 The crusher 1 is provided with a first drive assembly 5 for driving the rotating disk 4 to rotate. The first drive assembly 5 includes a first motor 51 and a belt 52. A mounting frame 9 is provided on the outside of the crusher 1. The crusher 1 is fixedly mounted on the mounting frame 9. The first motor 51 is fixedly mounted on the mounting frame 9. The first motor 51 and the rotating shaft 16 are connected in series by the belt 52.

[0032] Reference Figure 1 , Figure 2 A feed hopper 17 is fixedly connected to the outer wall of the crusher 1. The feed hopper 17 is connected to the inside of the crushing chamber 11. The feed hopper 17 is used to add lithium mica raw material into the crushing chamber 11. A baffle 18 is installed inside the feed hopper 17. One end of the baffle 18 is hinged to the inner wall of the feed hopper 17. Under normal conditions, the baffle 18 covers the inlet end of the feed hopper 17 under its own gravity.

[0033] A discharge hopper 2 is fixedly installed at the bottom of the crusher 1, and a discharge channel 12 is opened at the bottom of the crushing chamber 11. The discharge hopper 2 is connected to the discharge channel 12. A screening frame 6 is provided in the discharge channel 12. In this embodiment, the screening frame 6 includes a mounting frame 65 and a screening mesh plate 66. The mounting frame 65 is installed on the inner wall of the discharge channel 12, and the screening mesh plate 66 is fixedly installed in the mounting frame 65. The mesh of the screening mesh plate 66 forms a screening channel 61 for the lithium mica raw material to fall.

[0034] Reference Figure 1 , Figure 4The bottom of the discharge hopper 2 is equipped with a receiving hopper 3, which is used to receive crushed lithium mica raw materials. The outer side of the discharge hopper 2 is covered with an isolation cloth sleeve 21, which is elastically set. One end of the isolation cloth sleeve 21 is fitted onto the outer side wall of the outlet end of the discharge hopper 2 and is fixedly connected to the discharge hopper 2 by bolts. For ease of description, the end of the isolation cloth sleeve 21 away from the discharge hopper 2 is defined as the free end of the isolation cloth sleeve 21. Multiple hanging rings 211 are fixedly installed on the free end of the isolation cloth sleeve 21. A docking ring 31 is fixedly installed on the outer side of the receiving hopper 3. The docking ring 31 is annular, and multiple hanging rods 311 for hanging the hanging ring 211 are fixedly installed at the bottom of the docking ring 31. When the hanging ring 211 is hung on the hanging rod 311, the outer side wall of the docking ring 31 abuts against the inner surface of the isolation cloth sleeve 21.

[0035] The implementation principle of Embodiment 1 of this application is as follows: After the crusher 1 crushes the lepidolite, the material falls from the discharge hopper 2 into the receiving hopper 3. An isolation cloth cover 21 is set at the outlet end of the discharge hopper 2 to reduce dust from drifting outward, reduce dust pollution to the surrounding environment, and improve the on-site working environment. In addition, the setting of the docking ring 31 allows the isolation cloth cover 21 to be hooked to the hooking rod 311 via the hooking ring 211. The isolation cloth cover 21 forms an angle at the part of the docking ring 31 to abut against the outer wall of the docking ring 31, improving the sealing effect between the isolation cloth cover 21 and the receiving hopper 3, further reducing the possibility of dust drifting outward. A screening frame 6 is set in the discharge channel 12. After crushing, the lepidolite raw material that meets the particle size requirements falls downward through the screening channel 61, while the large-sized lepidolite raw material remains in the crushing chamber 11 for further crushing by hammering, improving the crushing effect of the lepidolite raw material. Example 2

[0036] This application discloses a lithium carbonate production equipment.

[0037] The difference between the lithium carbonate production equipment disclosed in this application and that in Example 1 is as follows: Reference Figure 5 In this embodiment, a slide rail 23 is installed on the inner wall of the discharge hopper 2. The slide rail 23 is horizontally arranged, and two extrusion plates 22 are slidably installed on the slide rail 23. Extrusion channels 221 for lithium mica raw materials to fall into are formed between the extrusion plates 22 and the inner wall of the discharge hopper 2, and between the two extrusion plates 22. The crusher 1 is provided with a second drive assembly 7, which is used to drive the two extrusion plates 22 to reciprocate to move closer to each other or further away from each other.

[0038] Reference Figure 6 , Figure 7The second drive assembly 7 includes drive bars 71, drive discs 72, and drive components. Two drive bars 71 are provided, slidably mounted on the outside of the discharge hopper 2. The two drive bars 71 are correspondingly arranged with two extrusion plates 22. Each extrusion plate 22 is connected to a sliding rod 222, one end of which extends out of the discharge hopper 2 and is fixedly connected to the corresponding drive bar 71. Each drive bar 71 has a pushing groove 711, with both ends extending along the height direction. A connecting frame 24 is fixedly mounted on the outside of the discharge hopper 2. The drive discs 72 are rotatably connected to the connecting frame 24 of the discharge hopper 2. Two drive discs 72 are provided and correspondingly arranged with the two drive bars 71. An eccentric column 721 is rotatably mounted on the surface of each drive disc 72, and the eccentric column 721 is embedded in the pushing groove 711 of the corresponding drive bar 71.

[0039] A drive unit is installed in the discharge hopper 2. The drive unit is used to drive two drive disks 72 to rotate, and the two drive disks 72 are arranged in opposite directions of rotation. In this embodiment, the drive unit includes a second motor 73 and a drive gear 74. The second motor 73 is fixedly installed on the connecting frame 24, and the output shaft of the second motor 73 is coaxially connected to one of the drive disks 72. There are two drive gears 74, which are arranged corresponding to the two drive disks 72. Each drive gear 74 is coaxially fixed to the outer peripheral wall of the corresponding drive disk 72, and the two drive gears 74 mesh and transmit power.

[0040] The implementation principle of Embodiment 2 of this application is as follows: the crushed lepidolite raw material falls into the extrusion channel 221 formed by the extrusion plate 22 through the screening channel 61. By driving the drive disk 72 to rotate, the two extrusion plates 22 are forced to reciprocate to move closer or further away from each other, so as to crush the lepidolite raw material falling into the extrusion channel 221, thereby further improving the crushing effect of the lepidolite raw material. In addition, by setting two extrusion plates 22, multiple extrusion channels 221 are formed. When one extrusion channel 221 shrinks, the adjacent extrusion channel 221 expands. The effect achieved is that at least one extrusion channel 221 is in an expanded state, so as to facilitate the continuous falling of lepidolite raw material and reduce the possibility of blockage of the discharge channel 12. Example 3

[0041] This application discloses a lithium carbonate production equipment.

[0042] The difference between the lithium carbonate production equipment disclosed in this application and that in Example 1 is as follows: Reference Figure 8In this embodiment, a connecting ring 13 is provided between two adjacent rotating disks 4 in the crushing chamber 11. The connecting ring 13 is sleeved on the outside of the rotating shaft 16. The connecting ring 13 is provided with multiple connecting rods 14, which are correspondingly provided with multiple breaker hammers 41. One end of the connecting rod 14 is hinged to the outer peripheral wall of the connecting ring 13, and the other end is hinged to the side wall of the corresponding breaker hammer 41. A return spring 15 is connected between each breaker hammer 41 and the rotating disk 4. One end of the return spring 15 is fixedly connected to the surface of the rotating disk 4, and the other end is fixedly connected to the side wall of the breaker hammer 41.

[0043] The implementation principle of Embodiment 3 of this application is as follows: the connecting ring 13 connects all the breaker hammers 41 in series through multiple connecting rods 14. When one of the breaker hammers 41 hits the lithium mica raw material, the reverse impact force of the lithium mica raw material on this breaker hammer 41 can be dispersed to each breaker hammer 41 through the connecting ring 13, thereby improving the reverse impact force unloading effect and improving the stability of the overall structure. Example 4

[0044] This application discloses a lithium carbonate production equipment.

[0045] The difference between the lithium carbonate production equipment disclosed in this application and that in Example 3 is as follows: Reference Figure 9 , Figure 10 In this embodiment, the screening frame 6 includes multiple fixed screen bars 62 and multiple movable screen bars 63. The multiple fixed screen bars 62 are spaced apart at the inlet end of the discharge channel 12. The two ends of the fixed screen bars 62 are fixedly connected to the inner wall of the discharge channel 12, and an active area is formed between two adjacent fixed screen bars 62. The multiple movable screen bars 63 are correspondingly arranged with the multiple active areas. Each movable screen bar 63 is slidably arranged in the corresponding active area. The screen channel 61 is formed between the fixed screen bars 62 and the adjacent movable screen bars 63. The multiple movable screen bars 63 are connected by connecting bars 64. The multiple movable screen bars 63 are connected in series to form a whole through the connecting bars 64. Each fixed screen bar 62 is provided with a clearance groove 622 for avoiding the connecting bars 64.

[0046] The crusher 1 is equipped with a lifting assembly 8 for driving the movable screen bar 63 to reciprocate up and down. In this embodiment, the lifting assembly 8 includes two lifting cylinders 83. The cylinder bodies of the two lifting cylinders 83 are fixedly installed at the bottom of the crusher 1. The piston rods of the two lifting cylinders 83 extend into the crushing chamber 11 and are respectively connected to both ends of the connecting bar 64. It should be noted that in actual operation, it is necessary to control the extension amount of the piston rods of the lifting cylinders 83 to avoid the possibility of collision between the movable screen bar 63 and the breaker hammer 41.

[0047] In this embodiment, the two opposite sidewalls of the fixed screen bar 62 each have a first extrusion surface 621, and the distance between the two first extrusion surfaces 621 gradually decreases from bottom to top; the two opposite sidewalls of the movable screen bar 63 each have a second extrusion surface 631, and the distance between the two second extrusion surfaces 631 gradually decreases from top to bottom; the top of the movable screen bar 63 has a guide surface 632, and the two sides of the guide surface 632 are respectively connected to the two second extrusion surfaces 631, and the height of the guide surface 632 gradually decreases from the middle position to the sides.

[0048] The implementation principle of Embodiment 4 of this application is as follows: After the lepidolite raw material is crushed, it falls onto the screen frame 6. The crushed lepidolite raw material that meets the particle size requirements falls downward through the screen channel 61, while the larger lepidolite raw material remains in the crushing chamber 11 under the obstruction of the fixed screen bar 62 and the movable screen bar 63, and continues to be crushed. During this process, the movable screen bar 63 is forced to reciprocate up and down to disturb the lepidolite raw material on the screen frame 6, reducing the possibility of the screen channel 61 being blocked. During the reciprocating up and down process of the movable screen bar 63, the first extrusion surface 621 and the second extrusion surface 631 form an extrusion fit, which extrudes the lepidolite raw material passing through the screen channel 61, thereby further improving the crushing effect of the lepidolite raw material. Example 5

[0049] This application discloses a lithium carbonate production equipment.

[0050] The difference between the lithium carbonate production equipment disclosed in this application and that in Example 4 is as follows: Reference Figure 11 In this embodiment, the lifting assembly 8 includes a pull rod 81 and a rolling wheel 82. The pull rod 81 is vertically arranged and is slidably installed on the inner wall of the crushing chamber 11 to enable lifting. The lower end of the pull rod 81 is fixedly connected to the connecting bar 64, and the rolling wheel 82 is rotatably installed on the upper end of the pull rod 81. Two rotating rings 132 are fixedly installed on the surface of the connecting ring 13. The two rotating rings 132 are coaxially arranged with the connecting ring 13. The two rotating rings 132 are arranged radially spaced along the connecting ring 13, and a rotating slide 131 is formed between the two rotating rings 132. The rotating slide 131 is annular around the central axis of the connecting ring 13, and the rolling wheel 82 is rolled and embedded in the rotating slide 131.

[0051] It should be noted that in this embodiment, the connecting bar 64 has two pull rods 81, which are symmetrically distributed at both ends of the connecting bar 64; that is, among the multiple rotating disks 4 of the rotating shaft 16, only the rotating disks 4 on both sides of the edge are provided with rotating rings 132, while the rotating disk 4 located in the middle position is not provided with rotating rings 132.

[0052] The implementation principle of Embodiment 5 of this application is as follows: The rotating disk 4 rotates, driving the breaker hammer 41 to impact and crush the lepidolite raw material. The breaker hammer 41 swings back under the reverse impact force from the lepidolite raw material, thereby pulling the connecting ring 13 through the connecting rod 14. The connecting ring 13 pulls the rolling wheel 82 of the pull rod 81 through the inner peripheral wall of the docking slide, thereby pulling the connecting bar 64 and forcing multiple movable screen bars 63 to rise, thereby disturbing the lepidolite raw material located on the screen frame 6. As the rotating disk 4 continues to rotate, the movable screen bars 63 reciprocate up and down, reducing the possibility of the screen channel 61 being blocked. Example 6

[0053] This application also discloses a lithium carbonate production process.

[0054] A lithium carbonate production process specifically includes the following steps: S1. Crushing: The lithium mica raw material is fed into crusher 1 for crushing; S2. Mixing: The crushed lithium mica raw material is transferred to the mixing silo and stirred with auxiliary materials to obtain a mixture; S3. Calcination: The mixture is calcined in a calcining kiln.

[0055] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lithium carbonate production equipment, characterized in that: The equipment includes a crusher (1), a mixing bin, and a calcining kiln arranged in sequence. The bottom of the crusher (1) is provided with a discharge hopper (2), and the bottom of the discharge hopper (2) is provided with a receiving hopper cart (3). The outer side of the discharge hopper (2) is covered with an isolation cloth sleeve (21), and the free end of the isolation cloth sleeve (21) is provided with multiple hanging rings (211). The outer side of the receiving hopper cart (3) is provided with a docking ring (31), and the bottom of the docking ring (31) is provided with multiple hanging rods (311) for the hanging rings (211) to hang on. When the hanging rings (211) are hung on the hanging rods (311), the outer side wall of the docking rings (31) abuts against the inner surface of the isolation cloth sleeve (21).

2. The lithium carbonate production equipment according to claim 1, characterized in that: The crusher (1) has a crushing chamber (11) inside, and a rotating disk (4) is rotatably installed inside the crushing chamber (11). Multiple crushing hammers (41) are rotatably installed on the surface of the rotating disk (4). The multiple crushing hammers (41) are arranged at intervals around the central axis of the rotating disk (4). The crusher (1) is provided with a first drive assembly (5) for driving the rotating disk (4) to rotate. The bottom of the crushing chamber (11) is provided with a discharge channel (12). The discharge hopper (2) is connected to the discharge channel (12). The discharge channel (12) is provided with a screening frame (6). The screening frame (6) has multiple screening channels (61).

3. The lithium carbonate production equipment according to claim 2, characterized in that: Two extrusion plates (22) are slidably installed inside the discharge hopper (2). Extrusion channels (221) are formed between the extrusion plates (22) and the inner wall of the discharge hopper (2) and between the two extrusion plates (22). The crusher (1) is provided with a second drive assembly (7), which is used to drive the two extrusion plates (22) to reciprocate to approach or move away from each other.

4. The lithium carbonate production equipment according to claim 3, characterized in that: The second drive assembly (7) includes a drive bar (71), a drive disc (72), and a drive member. There are two drive bars (71), which are respectively connected to two extrusion plates (22). Each drive bar (71) has a push groove (711). The drive disc (72) is rotatably connected to the discharge hopper (2). There are two drive discs (72) and they are arranged corresponding to the two drive bars (71). Each drive disc (72) has an eccentric column (721) on its surface. The eccentric column (721) is embedded in the push groove (711) of the corresponding drive bar (71). The drive member is arranged in the discharge hopper (2). The drive member is used to drive the two drive discs (72) to rotate, and the two drive discs (72) are arranged in opposite directions of rotation.

5. A lithium carbonate production equipment according to claim 2, characterized in that: The surface of the rotating disk (4) is provided with multiple connecting posts (42), and the multiple connecting posts (42) are correspondingly arranged with multiple breaker hammers (41). Each breaker hammer (41) is hinged to the corresponding connecting post (42). The crushing chamber (11) is provided with a connecting ring (13), and the connecting ring (13) is provided with multiple connecting rods (14). The multiple connecting rods (14) are correspondingly arranged with multiple breaker hammers (41). One end of the connecting rod (14) is hinged to the connecting ring (13), and the other end is hinged to the corresponding breaker hammer (41). Each breaker hammer (41) is connected to the rotating disk (4) with a return spring (15).

6. The lithium carbonate production equipment according to claim 5, characterized in that: The screening frame (6) includes multiple fixed screen bars (62) and multiple movable screen bars (63). The multiple fixed screen bars (62) are spaced apart at the inlet end of the discharge channel (12), and an active area is formed between two adjacent fixed screen bars (62). The multiple movable screen bars (63) are correspondingly arranged with the multiple active areas. Each movable screen bar (63) is slidably arranged in the corresponding active area. The screening channel (61) is formed between the fixed screen bars (62) and the adjacent movable screen bars (63). The crusher (1) is provided with a lifting component (8) for driving the movable screen bars (63) to reciprocate and lift.

7. A lithium carbonate production equipment according to claim 6, characterized in that: A connecting bar (64) connects multiple movable screen bars (63), and the multiple movable screen bars (63) are connected in series through the connecting bar (64); the lifting assembly (8) includes a pull rod (81) and a roller (82). One end of the pull rod (81) is connected to the connecting bar (64), and the roller (82) is rotatably installed at the end of the pull rod (81) away from the connecting bar (64). The surface of the connecting ring (13) has a rotating slide (131), and the rotating slide (131) is annular around the central axis of the connecting ring (13). The roller (82) is rolled and embedded in the rotating slide (131).

8. A lithium carbonate production equipment according to claim 6, characterized in that: The fixed screen bar (62) has a first extrusion surface (621) on each of its two opposite sidewalls, and the distance between the two first extrusion surfaces (621) gradually decreases from bottom to top; the movable screen bar (63) has a second extrusion surface (631) on each of its two opposite sidewalls, and the distance between the two second extrusion surfaces (631) gradually decreases from top to bottom.

9. A lithium carbonate production equipment according to claim 8, characterized in that: The top of the movable screen bar (63) is provided with a guide surface (632), and two second extrusion surfaces (631) are connected to the two sides of the guide surface (632). The height of the guide surface (632) gradually decreases from the middle position to the two sides.

10. A lithium carbonate production process, based on the lithium carbonate production equipment according to any one of claims 1-9, comprising the following steps: S1. Crushing: Crushing the lepidolite raw material; S2. Mixing: Stir the raw materials and auxiliary materials to obtain a mixture; S3. Calcination: Calcination of the mixture.

Images