A filter press for lithium carbonate production

Abstract

This utility model discloses a filter press for lithium carbonate preparation, including a frame, a feed pipe on the right side of the frame, the right end of the feed pipe being connected to an external raw material supply device, and a material handling mechanism and a filter pressing mechanism. The material handling mechanism includes a chute, a sliding frame, a scraper frame, a fixed frame, a fixed shaft, and scrapers. The chute is located on the rear side of the upper surface of the frame, and the sliding frame is slidably connected inside the chute. The scraper frame is located on the front side of the sliding frame, and the fixed frame is located on the lower side inside the scraper frame. The fixed shaft is located on the lower side of the fixed frame, and scrapers are symmetrically connected to the outer arc surface of the fixed shaft. The outer surfaces of the two scrapers are respectively provided with uniformly distributed scraper blades. The filter pressing mechanism is located inside the frame. In this filter press for lithium carbonate preparation, the scraper scrapes the side wall of the filter plate with appropriate pressure, which can scrape off the attached lithium carbonate raw material.

Description

Technical Field

[0001] This utility model relates to the field of lithium resource recycling technology, specifically a filter press for lithium carbonate preparation. Background Technology

[0002] The lithium-rich aluminum electrolyte generated during aluminum electrolysis is currently mostly disposed of by landfilling or stockpiling in most aluminum electrolysis plants. However, landfilled or stockpiled lithium-rich aluminum electrolyte contains large amounts of soluble fluorides, which, under natural conditions, will enter the soil and groundwater, severely damaging the ecological environment and wasting a significant amount of lithium resources. Therefore, extracting lithium from lithium-rich aluminum electrolyte can not only reduce environmental pollution but also realize the resource utilization of lithium-rich aluminum electrolyte, supplementing my country's market demand for lithium resources and creating economic value. Current lithium extraction methods involve crushing and screening the aluminum electrolyte, then roasting it. The roasted material is mixed with water and filtered. The pH of the filtrate is adjusted to obtain cryolite. The filter residue is mixed with acid and filtered. The pH of the filtrate is adjusted to obtain aluminum fluoride. Then, carbonates are added to react and obtain lithium carbonate. The extraction of lithium carbonate requires the use of filter press equipment to achieve solid-liquid separation.

[0003] In the prior art, patent publication number CN201920472968.2 discloses a filter press, including a frame and a filter press body mounted on the frame. A discharge device for removing filter residue is provided above the filter press body. The discharge device includes a scraper, a first drive mechanism for driving the scraper to slide along the length of the filter press body, and a second drive mechanism for driving the scraper to move along the height of the filter press body.

[0004] The above-mentioned filter press has some problems in actual use. For example, the scraper can only move up and down and cannot scrape the filter plate with appropriate pressure. Some attached raw materials cannot be completely scraped off. Therefore, we propose a filter press for lithium carbonate preparation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a filter press for lithium carbonate preparation, which can scrape off the attached lithium carbonate raw material, thus effectively solving the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a filter press for lithium carbonate preparation, comprising a frame, a feed pipe on the right side of the frame, the right end of the feed pipe being externally connected to an external raw material supply device, and further comprising a material handling mechanism and a filter press mechanism;

[0007] Material handling mechanism: It includes a chute, a sliding frame, a scraper frame, a fixed frame, a fixed shaft, and scrapers. The chute is opened on the rear side of the upper surface of the frame. The sliding frame is slidably connected inside the chute. The scraper frame is provided on the front side of the sliding frame. The fixed frame is provided on the lower side of the inside of the scraper frame. The fixed shaft is provided on the lower side of the fixed frame. The scrapers are symmetrically connected to the outer arc surface of the fixed shaft. The outer surfaces of the two scrapers are provided with evenly distributed scraper blades.

[0008] Filter press mechanism: It is located inside the frame, so that the scraper can scrape off the attached lithium carbonate raw material by scraping the side wall of the filter press plate with appropriate pressure.

[0009] Furthermore, a controller is provided on the right side of the frame, and the controller is located on the front side of the frame. The input terminal of the controller is electrically connected to an external power source, so that the motor can operate normally.

[0010] Furthermore, the material handling mechanism also includes a lead screw and a bellows. The lead screw is rotatably connected to the inside of the chute, and the middle part of the lead screw is threaded to the lower side of the sliding frame. Bellows are respectively provided on the lower side of the left and right sides of the sliding frame. The ends of the two bellows are respectively fixedly connected to the inner wall of the chute. The lead screw is located inside the two bellows. A motor is provided on the right rear side of the frame. The output shaft of the motor is fixedly connected to the right end of the lead screw. The input end of the motor is electrically connected to the output end of the controller to realize the function of driving the scraper to move left and right.

[0011] Furthermore, the material handling mechanism also includes a first cylinder, which is located in the middle of the upper side wall of the scraper. The telescopic end of the first cylinder is fixedly connected to the middle of the upper surface of the fixed frame. The left and right sides of the fixed frame are respectively provided with evenly distributed springs. The ends of the six springs are respectively fixedly connected to the inner wall of the scraper located on the same side. The air inlet of the first cylinder is connected to an external air pump to provide pressure for the scraper to scrape the filter plate.

[0012] Furthermore, a hydraulic cylinder is provided on the left side of the frame, and a pressing plate is fixedly connected to the telescopic end of the hydraulic cylinder. An external hydraulic pump is connected to the inlet of the hydraulic cylinder. A thrust plate is provided on the right side wall of the frame to achieve the function of sealing the filter press plate.

[0013] Furthermore, the filter press mechanism includes filter plates, lugs, lower extension arms, linkage chains, air inlets, and limiting rods. The lugs are evenly overlapped on the front and rear side walls of the frame. A filter plate is fixedly connected between every two longitudinally adjacent lugs. A linkage chain is provided on the front side between every two adjacent filter plates. Air inlets are provided on the lower front side of each of the twelve filter plates. The front ends of the twelve air inlets are externally connected to an external air pump. Lower extension arms are provided on the lower front and rear sides of the filter plates. Limiting rods are symmetrically fixedly connected on the lower side between the left and right inner walls of the frame. The middle part of the twelve lower extension arms on the front side is slidably connected to the outer arc surface of the front limiting rod, and the middle part of the twelve lower extension arms on the rear side is slidably connected to the outer arc surface of the rear limiting rod, thereby realizing the function of filter press.

[0014] Furthermore, a storage box is provided on the lower side of the sliding frame, and the upper opening of the storage box corresponds to the upper and lower positions of the scraper to realize the function of receiving materials.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This filter press for lithium carbonate preparation has the following advantages:

[0016] This filter press uses a spring structure and a screw drive structure. After the filter plates complete the filtration operation, the screw drive structure adjusts the lateral distance of the scraper, and the first cylinder adjusts the height of the scraper. When the scraper extends between the two filter plates, it is affected by the elastic force of the spring structure, so that the scraper scrapes the side wall of the filter plate with appropriate pressure, which can scrape off the attached lithium carbonate raw material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the material handling mechanism of this utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the filter press mechanism of this utility model.

[0021] In the diagram: 1. Frame, 2. Pressing plate, 3. Thrust plate, 4. Material handling mechanism, 41. Slide groove, 42. Sliding frame, 43. Lead screw, 44. Corrugated pipe, 45. Scraper frame, 46. First cylinder, 47. Fixed frame, 48. Fixed shaft, 49. Scraper, 5. Filter press mechanism, 51. Filter press plate, 52. Lug, 53. Lower extension arm, 54. Linkage chain, 55. Air inlet, 56. Limiting rod, 6. Spring, 7. Storage box, 8. Feed pipe, 9. Controller, 10. Motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This embodiment provides a technical solution: a filter press for lithium carbonate preparation, including a frame 1, a feed pipe 8 on the right side of the frame 1, the right end of the feed pipe 8 being connected to an external raw material supply device, a material handling mechanism 4 and a filter pressing mechanism 5, a controller 9 on the right side of the frame 1, the controller 9 being located on the front side of the frame 1, the input end of the controller 9 being electrically connected to an external power source, a hydraulic cylinder on the left side of the frame 1, a pressing plate 2 being fixedly connected to the telescopic end of the hydraulic cylinder, an external hydraulic pump being connected to the inlet of the hydraulic cylinder, and a thrust plate 3 on the right side wall of the frame 1;

[0024] Material handling mechanism 4 includes a chute 41, a sliding frame 42, a scraper frame 45, a fixed frame 47, a fixed shaft 48, and scrapers 49. The chute 41 is located on the rear side of the upper surface of the frame 1. The sliding frame 42 is slidably connected inside the chute 41. The scraper frame 45 is located on the front side of the sliding frame 42. The fixed frame 47 is located on the lower side of the inside of the scraper frame 45. The fixed shaft 48 is located on the lower side of the fixed frame 47. The scrapers 49 are symmetrically rotatably connected to the outer arc surface of the fixed shaft 48. The outer surfaces of the two scrapers 49 are respectively provided with evenly distributed scraper blades. The material handling mechanism 4 also includes a lead screw 43 and a bellows 44. The lead screw 43 is rotatably connected inside the chute 41. The middle part of the lead screw 43 is threadedly connected to the lower side of the sliding frame 42. Bellows 44 are respectively provided on the lower side of the left and right sides of the sliding frame 42. The ends of the two bellows 44 are respectively fixedly connected to the inner wall of the chute 41. The lead screw 43 is located on the two bellows. Inside the tube 44, a motor 10 is provided on the right rear side of the frame 1. The output shaft of the motor 10 is fixedly connected to the right end of the lead screw 43. The input end of the motor 10 is electrically connected to the output end of the controller 9. The material handling mechanism 4 also includes a first cylinder 46. The first cylinder 46 is located in the middle of the upper side wall of the scraper frame 45. The telescopic end of the first cylinder 46 is fixedly connected to the middle of the upper surface of the fixed frame 47. The left and right sides of the fixed frame 47 are respectively provided with evenly distributed springs 6. The ends of the six springs 6 are respectively fixedly connected to the inner wall of the scraper frame 45 located on the same side. The air inlet of the first cylinder 46 is connected to an external air pump. The lower side of the sliding frame 42 is provided with a storage box 7. The upper opening of the storage box 7 corresponds to the vertical position of the scraper 49. During the left and right movement of the sliding frame 42, the corrugated tube 44 will perform corresponding adaptive extension and retraction to seal the lead screw 43 and prevent the external thread surface of the lead screw 43 from being contaminated.

[0025] Filter press mechanism 5: Located inside the frame 1, the filter press mechanism 5 includes filter press plates 51, lugs 52, lower extension arms 53, linkage chains 54, air inlets 55, and limiting rods 56. The lugs 52 are evenly overlapped on the front and rear side walls of the frame 1. A filter press plate 51 is fixedly connected between every two longitudinally adjacent lugs 52. A linkage chain 54 is provided on the front side between every two adjacent filter press plates 51. Air inlets 55 are provided on the lower front side of each of the twelve filter press plates 51. The front ends of the twelve air inlets 55 are externally connected to an air pump. Lower extension arms 53 are provided on the lower front and rear sides of the filter press plates 51. Limiting rods 56 are symmetrically fixedly connected on the lower side between the left and right inner walls of the frame 1. The twelve lower extension arms 53 on the front side... The middle part of the long arm 53 is slidably connected to the outer arc surface of the front limiting rod 56, and the middle parts of the twelve lower extension arms 53 on the rear side are slidably connected to the outer arc surface of the rear limiting rod 56. When the filter press is needed, the external hydraulic pump can be adjusted, the extension end of the hydraulic cylinder will operate, the extension end of the hydraulic cylinder will extend, thereby driving the pressing plate 2 to move to the right. As the pressing plate 2 moves to the right, the filter plates 51 are pushed from left to right in sequence, forcing the twelve filter plates 51 to overlap together. At this time, the hydraulic cylinder applies a force of 30 MPa to press the twelve filter plates 51. At this time, every two adjacent filter plates 51 form a filter chamber. At this time, the external raw material supply equipment can be adjusted. Lithium carbonate raw material enters the frame 1 through the feed pipe 8, and through the guide hole in the middle of the filter plate 51, this mud Lithium carbonate in a muddy state fills the filter chamber sequentially, and with continuous input, water in the lithium carbonate muddy state is filtered through the filter membrane on the filter plate 51. Solid particles are trapped inside the filter chamber and form a filter cake, while the liquid is discharged outside the filter plate through the filtrate channels formed by the filter plates 51. After the filtration operation is completed, the external air pump can be adjusted. The external air pump introduces compressed gas into each filter plate through the air inlet 55, forcing the filter screens on both sides of the filter plate 51 to expand, compressing the space of the filter chamber and performing diaphragm pressing. After the above steps are completed, the extension end of the hydraulic cylinder retracts regularly. When it retracts to the moving distance, it will pull the filter plate 51 sequentially from left to right through the linkage chain 54. Each time a filter plate 51 is pulled to a certain distance, The pulling can be stopped. At this time, the controller 9 can be adjusted to start the motor 10. The output shaft of the motor 10 rotates in both directions, thereby driving the sliding frame 42 to move left and right within the slide groove 41. This moves the sliding frame 42 between the two adjacent open filter plates 51, causing the filter cake between the two filter plates 51 to fall downwards into the storage box 7. After the above operations are completed, the external air pump can be adjusted to extend the telescopic end of the first cylinder 46, thereby driving the scraper frame 45 to move downwards. This causes the two scrapers 49 to extend between the two filter plates 51. As the scrapers 49 move downwards, they scrape away the stubborn particles adhering to the filter plates 51. As the scrapers 49 move downwards, they are also affected by the elastic force of the spring 6.During the scraping process, the two scrapers 49 are pressed against each other and, under the elastic force of the spring 6, are forced to open apart. This causes the scraper blades on the two scrapers 49 to press tightly against the side wall of the filter plate 51, scraping off the particles attached to the filter plate 51 and causing them to fall into the storage box 7. These filter cake fragments that fall into the storage box 7 are the lithium carbonate mixture. After completing the above steps, the scrapers 49 are reset, and the remaining filter plates 51 are opened sequentially in the same manner to complete the lithium carbonate filtration operation.

[0026] The working principle of the filter press for lithium carbonate preparation provided by this utility model is as follows: When the filter press is needed, the external hydraulic pump can be adjusted, and the telescopic end of the hydraulic cylinder will operate. The telescopic end of the hydraulic cylinder will extend, thereby driving the pressing plate 2 to move to the right. As the pressing plate 2 moves to the right, the filter plates 51 are pushed sequentially from left to right, forcing the twelve filter plates 51 to overlap together. At this time, the hydraulic cylinder applies a force of 30 MPa to press the twelve filter plates 51. At this time, every two adjacent filter plates 51 form a filter chamber. At this time, the external raw material supply equipment can be adjusted, and the lithium carbonate raw material enters the frame 1 through the feed pipe 8. Through the guide hole in the middle of the filter plate 51, these mud-like materials... Lithium carbonate is sequentially filled into the filter chamber, and with continuous input, the water in the muddy lithium carbonate is filtered through the filter membrane on the filter plate 51. Solid particles are trapped inside the filter chamber and form a filter cake, while the liquid is discharged outside the filter plate through the filtrate channels formed by the filter plates 51. After the filtration operation is completed, the external air pump can be adjusted. The external air pump introduces compressed gas into each filter plate through the air inlet 55, forcing the filter screens on both sides of the filter plate 51 to expand, compressing the space of the filter chamber and performing diaphragm pressing. After completing the above steps, the extension end of the hydraulic cylinder retracts regularly. When it retracts to the moving distance, it will move from left to right through the linkage chain 54. Pull the filter press plate 51 one by one. After each filter press plate 51 has been pulled a certain distance, stop pulling. At this time, control controller 9 can be adjusted to start motor 10. The output shaft of motor 10 rotates in both directions, thereby driving sliding frame 42 to move left and right within slide groove 41. This moves sliding frame 42 between two adjacent open filter press plates 51, at which point the filter cake between the two filter press plates 51 falls downward into storage box 7. After completing the above operations, control external air pump to extend the telescopic end of first cylinder 46, thereby driving scraper frame 45 to move downward, causing two scrapers 49 to extend between the two filter press plates 51. As the scraper blades on plate 9 move downwards, they scrape away the stubborn particles adhering to the filter plate 51. As the scraper blades 49 move downwards, they are also affected by the elastic force of spring 6. During the scraping process, the two scraper blades 49 press against each other, and the elastic force of spring 6 forces them to open up, causing the scraper blades on the two scraper blades 49 to press tightly against the side wall of the filter plate 51, scraping off the particles adhering to the filter plate 51 and causing them to fall into the storage bin 7. These filter cake fragments that fall into the storage bin 7 are the lithium carbonate mixture. After completing the above steps, the scraper blades 49 are reset. The remaining filter plates 51 are then opened sequentially following the above steps to complete the lithium carbonate filtration operation.

[0027] It is worth noting that the core chip of the controller 9 disclosed in the above embodiments is a single-chip microcomputer, specifically the S7-200. The hydraulic cylinder, the first air cylinder 46, and the motor 10 can be freely configured according to the actual application scenario. It is recommended to use the JB4395 hydraulic cylinder, the first air cylinder 46 is recommended to use the JMMS50 series waterproof cylinder, and the motor 10 is recommended to use the BL130 servo motor. The controller 9 controls the operation of the motor 10 using methods commonly used in the prior art.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A filter press for lithium carbonate preparation, comprising a frame (1), a feed pipe (8) provided on the right side of the frame (1), the right end of the feed pipe (8) being externally connected to an external raw material supply device, characterized in that: It also includes a material receiving mechanism (4) and a filter press mechanism (5); Material handling mechanism (4): It includes a chute (41), a sliding frame (42), a scraper frame (45), a fixed frame (47), a fixed shaft (48), and a scraper (49). The chute (41) is opened on the rear side of the upper surface of the frame (1). The sliding frame (42) is slidably connected inside the chute (41). The scraper frame (45) is provided on the front side of the sliding frame (42). The fixed frame (47) is provided on the lower side inside the scraper frame (45). The fixed shaft (48) is provided on the lower side of the fixed frame (47). The scraper (49) is symmetrically connected to the outer arc surface of the fixed shaft (48). The outer surfaces of the two scrapers (49) are respectively provided with uniformly distributed scraper blades. Filter press (5): It is located inside the frame (1).

2. The filter press for lithium carbonate preparation according to claim 1, characterized in that: A controller (9) is provided on the right side of the frame (1). The controller (9) is located on the front side of the frame (1), and the input terminal of the controller (9) is electrically connected to an external power source.

3. A filter press for lithium carbonate preparation according to claim 2, characterized in that: The material handling mechanism (4) also includes a lead screw (43) and a bellows (44). The lead screw (43) is rotatably connected to the inside of the slide groove (41). The middle part of the lead screw (43) is threadedly connected to the lower side of the sliding frame (42). The lower side of the left side and the lower side of the right side of the sliding frame (42) are respectively provided with bellows (44). The ends of the two bellows (44) are respectively fixedly connected to the inner wall of the slide groove (41). The lead screw (43) is located inside the two bellows (44). The rear right side of the frame (1) is provided with a motor (10). The output shaft of the motor (10) is fixedly connected to the right end of the lead screw (43). The input end of the motor (10) is electrically connected to the output end of the controller (9).

4. A filter press for lithium carbonate preparation according to claim 1, characterized in that: The material handling mechanism (4) further includes a first cylinder (46), which is located in the middle of the upper side wall of the scraper (45). The telescopic end of the first cylinder (46) is fixedly connected to the middle of the upper surface of the fixed frame (47). The left and right sides of the fixed frame (47) are respectively provided with evenly distributed springs (6). The ends of the six springs (6) are respectively fixedly connected to the inner wall of the scraper (45) located on the same side. The air inlet of the first cylinder (46) is connected to an external air pump.

5. A filter press for lithium carbonate preparation according to claim 1, characterized in that: A hydraulic cylinder is provided on the left side of the frame (1), and a pressure plate (2) is fixedly connected to the telescopic end of the hydraulic cylinder. An external hydraulic pump is connected to the inlet of the hydraulic cylinder. A thrust plate (3) is provided on the right side wall of the frame (1).

6. A filter press for lithium carbonate preparation according to claim 5, characterized in that: The filter press mechanism (5) includes filter press plates (51), lugs (52), lower extension arms (53), linkage chains (54), air inlets (55), and limiting rods (56). The lugs (52) are evenly attached to the front and rear side walls of the frame (1). A filter press plate (51) is fixedly connected between every two longitudinally adjacent lugs (52). A linkage chain (54) is provided on the front side between every two adjacent filter press plates (51). The lower side of the front side of each of the twelve filter press plates (51) is provided with... The front ends of the twelve air inlets (55) are respectively connected to external air pumps. The lower side of the front side and the lower side of the rear side of the filter press plate (51) are respectively provided with lower extension arms (53). The lower side of the left and right inner walls of the frame (1) is symmetrically connected with limit rods (56). The middle part of the twelve lower extension arms (53) on the front side is slidably connected to the outer arc surface of the limit rod (56) on the front side. The middle part of the twelve lower extension arms (53) on the rear side is slidably connected to the outer arc surface of the limit rod (56) on the rear side.

7. A filter press for lithium carbonate preparation according to claim 1, characterized in that: The lower side of the sliding frame (42) is provided with a storage box (7), and the upper opening of the storage box (7) corresponds to the upper and lower positions of the scraper (49).

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