Battery-grade lithium carbonate demagnetization device

Abstract

The utility model belongs to the technical field of magnetic removal device, concretely relates to a battery grade lithium carbonate magnetic removal device, including the magnetic separation cylinder, the inside middle part of magnetic separation cylinder is provided with the electromagnetic cylinder, the outside upper portion of magnetic separation cylinder is fixedly connected with the support, the tail end of support is fixedly connected with the top seat, the top seat is located the top of magnetic separation cylinder, the upper end middle part of top seat is fixedly installed with motor, the output shaft of motor penetrates top seat and is connected with top seat through bearing. Through motor drive square shaft and shaft sleeve, drive cyclone seat high -speed rotation, utilize centrifugal force and throw the carbonic acid lithium material that invests to the electromagnetic cylinder inner wall even dispersed, this design increased the effective contact area of material and magnetic field, make magnetic impurity can be fully adsorbed by electromagnetic cylinder, simultaneously, the unique structure of cyclone seat avoided material accumulation, ensured the continuity and high efficiency of magnetic removal process, thereby promoted the purification efficiency and product purity of battery grade carbonic acid lithium.

Description

Technical Field

[0001] This solution belongs to the field of demagnetizing devices, specifically involving a battery-grade lithium carbonate demagnetizing device. Background Technology

[0002] Lithium carbonate, especially high-purity battery-grade lithium carbonate, is a key raw material for cathode materials in lithium-ion batteries (such as lithium iron phosphate, lithium cobalt oxide, and ternary materials). Its purity directly determines the battery's energy density, cycle life, and safety performance. During the production of lithium carbonate, trace amounts of magnetic metallic impurities such as iron, nickel, and chromium are often introduced due to factors such as raw material sourcing, equipment wear, or process variations. Even in extremely low concentrations, these magnetic impurities can trigger internal micro-short circuits and catalyze side reactions during battery charging and discharging, severely impairing the battery's overall performance and safety.

[0003] Currently, magnetic separation is the common method for removing magnetic impurities from powder materials, with vertical ring high-gradient magnetic separators being widely used. However, when applied to high-value-added, high-requirement powders such as battery-grade lithium carbonate, existing technologies have significant shortcomings: First, in traditional magnetic separators, materials mainly rely on gravity to fall, resulting in insufficient contact with the magnetic medium and a tendency for material flow "short-circuiting," causing some magnetic impurities to remain uncaptured and affecting demagnetization efficiency. Second, magnetic impurities adsorbed on the magnetic medium require manual cleaning after the machine is stopped, a process that is labor-intensive, time-consuming, and impacts continuous production efficiency. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this solution is to provide a battery-grade lithium carbonate demagnetizing device to solve the problems of poor demagnetizing effect and difficulty in cleaning of existing demagnetizing devices.

[0005] To achieve the above objectives, this solution provides a battery-grade lithium carbonate demagnetizing device, including a magnetic separator. An electromagnetic cylinder is disposed in the middle of the inner side of the magnetic separator. A bracket is fixedly connected to the upper outer side of the magnetic separator. A top seat is fixedly connected to the end of the bracket. The top seat is located above the magnetic separator. A motor is fixedly installed in the middle of the upper end of the top seat. The output shaft of the motor passes through the top seat and is connected to the top seat through a bearing. A square shaft is fixedly connected to the end of the output shaft. A bushing is slidably connected to the outer side of the square shaft. A vortex seat is fixedly connected to the end of the bushing. The vortex seat is located inside the electromagnetic cylinder.

[0006] The principle of this scheme is as follows: In operation, battery-grade lithium carbonate powder containing magnetic impurities is first fed into the magnetic separator through the opening at the top. The material is collected by the conical guide shroud and guided to the cyclone seat below. Simultaneously, the motor is started, and the motor's output shaft drives the square shaft to rotate. The square shaft transmits torque to the bushing slidably connected to it through its square cross-section, thereby driving the cyclone seat, which is fixedly connected to the bushing, to rotate at high speed. The rotating cyclone seat and its multiple swirling strips on its inclined surface exert a strong centrifugal force on the falling material, evenly and dispersedly throwing the material towards the inner wall of the electromagnetic cylinder. During this process, the magnetic impurities in the material are rapidly adsorbed onto the inner wall of the electromagnetic cylinder under the influence of the strong magnetic field, while the non-magnetic pure lithium carbonate powder continues to pass downwards through the annular space between the electromagnetic cylinder and the cyclone seat under the influence of gravity, ultimately exiting the magnetic separator. The material is discharged and collected at the bottom of the drum, completing one effective magnetic separation. When a batch of material is processed or magnetic impurities need to be cleaned, feeding is stopped and the motor is turned off. Then, the electric push rod is extended, pushing the linkage seat to descend smoothly along the vertical direction determined by the guide rod. The linkage seat drives the scraper ring to move down synchronously through the fixed rod. During this process, the outer ring wall of the scraper ring slides tightly against the inner wall of the electromagnetic drum, effectively scraping off all the magnetic impurities adsorbed on its surface. The scraped magnetic impurities fall to the bottom of the magnetic separator drum under the action of gravity and can be collected and processed through a special slag discharge port, thereby avoiding contamination of the next batch of material. After cleaning, the electric push rod is retracted, raising the scraper ring and cyclone seat back to the initial position at the top, preparing for the next magnetic separation operation. In addition, the magnetic field of the electromagnetic drum can be turned off or maintained as needed.

[0007] The technical advantages of this solution are as follows: by driving the square shaft and bushing with an electric motor, the cyclone separator rotates at high speed. Centrifugal force is used to evenly disperse the lithium carbonate material and throw it onto the inner wall of the electromagnetic cylinder. This design increases the effective contact area between the material and the magnetic field, allowing magnetic impurities to be fully adsorbed by the electromagnetic cylinder. At the same time, the unique structure of the cyclone separator avoids material accumulation, ensuring the continuity and efficiency of the demagnetization process, thereby improving the purification efficiency and product purity of battery-grade lithium carbonate.

[0008] By setting up an electric scraping mechanism, after magnetic separation is completed, the linkage seat and scraper ring can be moved down as a whole by an electric push rod to automatically remove the magnetic impurities adsorbed on the inner wall of the electromagnetic drum. This design realizes online cleaning of magnetic impurities without manual intervention or disassembly of the equipment, which greatly simplifies the operation process, improves the automation and continuity of equipment operation, and effectively ensures the efficiency and stability of large-scale industrial production.

[0009] Furthermore, multiple supports are provided, and these supports are arranged in a circular array along the circumference of the magnetic separator. The supports are U-shaped, allowing the top seat to be mounted directly above the magnetic separator.

[0010] Furthermore, the cyclone seat is frustum-shaped, and multiple cyclone strips are fixedly connected to the inclined surface of the cyclone seat. Through the arrangement of the cyclone seat and cyclone strips, the material fed into the magnetic separator can be dispersed to the surrounding area by centrifugal force and come into contact with the inner wall of the electromagnetic cylinder, thereby facilitating the electromagnetic cylinder's adsorption of magnetic substances from the material.

[0011] Furthermore, a linkage seat is mounted on the upper outer side of the bushing via a bearing. Two fixed rods are fixedly connected to the bottom of the linkage seat, and a scraper ring is fixedly connected to the ends of the two fixed rods. The outer ring wall of the scraper ring is slidably connected to the inner wall of the electromagnetic cylinder. An electric push rod is fixedly mounted on the upper right side of the top seat. The telescopic shaft of the electric push rod passes through the top seat and is slidably connected to the top seat. The end of the telescopic shaft is fixedly connected to the linkage seat. By pushing the linkage seat downwards with the electric push rod, the linkage seat drives the bushing, the vortex seat, and the scraper ring to move downwards synchronously, thereby scraping off the magnetic material adsorbed on the inner wall of the electromagnetic cylinder after magnetic separation.

[0012] Furthermore, a guide rod is fixedly connected to the upper left side of the linkage seat. The guide rod passes through the top seat and is slidably connected to the top seat. The position of the guide rod is symmetrical to the position of the electric push rod, so that it can provide guidance during the process of the electric push rod driving the linkage seat to rise and fall.

[0013] Furthermore, a flow guide shroud is fixedly connected to the inner side of the upper opening of the magnetic separator, and the narrow opening of the flow guide shroud corresponds to the position of the cyclone separator. The flow guide shroud allows the material fed into the magnetic separator to be guided to the cyclone separator.

[0014] Furthermore, multiple support legs are fixedly connected to the lower outer side of the magnetic separator, and these support legs are arranged in a circular array along the circumference of the magnetic separator. The support legs provide overall support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic diagram of local structure Figure 1 ; Figure 3 This is an embodiment of the present utility model. Figure 1 Schematic diagram of local structure Figure 2 ; Figure 4 This is an embodiment of the present utility model. Figure 1 The front sectional view.

[0016] The following detailed explanation illustrates the specific implementation methods: The reference numerals in the accompanying drawings include: magnetic separator 1, electromagnetic separator 2, bracket 3, top seat 4, motor 5, square shaft 6, bushing 7, swirl seat 8, swirl bar 81, linkage seat 9, fixing rod 10, scraper ring 11, electric push rod 12, guide rod 13, flow guide shroud 14, and support leg 15. Detailed Implementation

[0017] The basic implementation examples are as follows: Figures 1-4 As shown: A battery-grade lithium carbonate demagnetizing device includes a magnetic separator 1, an electromagnetic cylinder 2 disposed in the inner center of the magnetic separator 1, and a support 3 fixedly connected to the upper outer side of the magnetic separator 1. Multiple supports 3 are arranged in a circular array along the circumference of the magnetic separator 1. The support 3 is U-shaped, allowing a top seat 4 to be mounted directly above the magnetic separator 1. The top seat 4 is fixedly connected to the end of the support 3, and is located above the magnetic separator 1. A motor 5 is fixedly mounted in the upper center of the top seat 4. The output shaft of the motor 5 passes through the top seat 4 and is connected to the top seat 4 via a bearing. A square shaft 6 is fixedly connected to the end of the output shaft. A bushing 7 is slidably connected to the outer side of the square shaft 6. A vortex seat 8 is fixedly connected to the end of the bushing 7, located inside the electromagnetic cylinder 2. The vortex seat 8 is frustoconical, and multiple vortex strips 81 are fixedly connected to its inclined surface. By using the cyclone seat 8 and cyclone strips 81, the material fed into the magnetic separator 1 can be dispersed to the surrounding area by centrifugal force and come into contact with the inner wall of the electromagnetic cylinder 2, thus facilitating the adsorption of magnetic substances from the material by the electromagnetic cylinder 2. A flow guide shroud 14 is fixedly connected to the inner side of the upper opening of the magnetic separator 1, and the narrow opening of the flow guide shroud 14 corresponds to the position of the cyclone seat 8. The flow guide shroud 14 guides the material fed into the magnetic separator 1 to the cyclone seat 8. Multiple support legs 15 are fixedly connected to the lower outer side of the magnetic separator 1, and these support legs 15 are arranged in a circular array along the circumference of the magnetic separator 1. The support legs 15 provide overall support.

[0018] like Figure 1 , Figure 2 , Figure 4As shown, a linkage seat 9 is mounted on the upper outer side of the bushing 7 via a bearing. Two fixed rods 10 are fixedly connected to the bottom of the linkage seat 9, and a scraper ring 11 is fixedly connected to the ends of the two fixed rods 10. The outer ring wall of the scraper ring 11 is slidably connected to the inner wall of the electromagnetic cylinder 2. An electric push rod 12 is fixedly mounted on the upper right side of the top seat 4. The telescopic shaft of the electric push rod 12 passes through the top seat 4 and is slidably connected to the top seat 4. The end of the telescopic shaft is fixedly connected to the linkage seat 9. A guide rod 13 is fixedly connected to the upper left side of the linkage seat 9. The guide rod 13 passes through the top seat 4 and is slidably connected to the top seat 4. The position of the guide rod 13 is symmetrical to the position of the electric push rod 12, so that it can provide guidance during the process of the electric push rod 12 driving the linkage seat 9 to rise and fall. By pushing the linkage seat 9 downward by the electric push rod 12, the linkage seat 9 drives the bushing 7, the vortex seat 8 and the scraper ring 11 to move down synchronously, thereby scraping off the magnetic material adsorbed on the inner wall of the electromagnetic cylinder 2 after magnetic separation.

[0019] The specific implementation process of this utility model is as follows: In use, battery-grade lithium carbonate powder containing magnetic impurities is first fed into the opening at the top of the magnetic separator 1. The material is collected by the conical guide shroud 14 and guided to the vortex seat 8 below. Simultaneously, the motor 5 is started. The output shaft of the motor 5 drives the square shaft 6 to rotate. The square shaft 6 transmits torque to the bushing 7, which is slidably connected to it, through its square cross-section. This drives the vortex seat 8, which is fixedly connected to the bushing 7, to rotate at high speed. The rotating vortex seat 8 and the multiple vortex strips 81 on its inclined surface exert a strong centrifugal force on the falling material, evenly and dispersedly throwing the material towards the inner wall of the electromagnetic cylinder 2. During this process, the magnetic impurities in the material are rapidly adsorbed onto the inner wall of the electromagnetic cylinder 2 under the action of a strong magnetic field, while the non-magnetic pure lithium carbonate powder continues to pass downwards through the annular space between the electromagnetic cylinder 2 and the vortex seat 8 under the action of gravity, and finally exits from the magnetic separator. 1. Bottom discharge collection completes one effective magnetic separation. When a batch of material is processed or magnetic impurities need to be cleaned, feeding is stopped and motor 5 is turned off. Then, the electric push rod 12 is extended and pushed by the electric push rod 12 to push the linkage seat 9 smoothly downward along the vertical direction determined by the guide rod 13. The linkage seat 9 drives the scraper ring 11 to move down synchronously through the fixed rod 10. During this process, the outer ring wall of the scraper ring 11 slides against the inner wall of the electromagnetic cylinder 2, effectively scraping off all the magnetic impurities adsorbed on its surface. The scraped magnetic impurities fall to the bottom of the magnetic separator 1 under the action of gravity and can be collected and processed through a special slag discharge port, thereby avoiding contamination of the next batch of material. After cleaning, the electric push rod 12 is retracted to lift the scraper ring 11 and the cyclone seat 8 back to the initial position at the top, preparing for the next magnetic separation operation. In addition, the magnetic field of the electromagnetic cylinder 2 can be turned off or maintained as needed.

[0020] This solution uses a motor 5 to drive a square shaft 6 and a bushing 7, which in turn drives a vortex seat 8 to rotate at high speed. Centrifugal force is used to evenly disperse the fed lithium carbonate material and throw it onto the inner wall of the electromagnetic cylinder 2. This design increases the effective contact area between the material and the magnetic field, allowing magnetic impurities to be fully adsorbed by the electromagnetic cylinder 2. At the same time, the unique structure of the vortex seat 8 prevents material accumulation, ensuring the continuity and efficiency of the demagnetization process, thereby improving the purification efficiency and product purity of battery-grade lithium carbonate.

[0021] By setting up an electric scraping mechanism, after magnetic separation is completed, the linkage seat 9 and scraper ring 11 can be driven to move down as a whole by the electric push rod 12 to automatically remove the magnetic impurities adsorbed on the inner wall of the electromagnetic cylinder 2. This design realizes online cleaning of magnetic impurities without manual intervention or disassembly of the equipment, which greatly simplifies the operation process, improves the automation and continuity of equipment operation, and effectively ensures the efficiency and stability of large-scale industrial production.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A battery-grade lithium carbonate demagnetizing device, comprising a magnetic separator, characterized in that: An electromagnetic cylinder is installed in the middle of the inner side of the magnetic separator. A bracket is fixedly connected to the upper outer side of the magnetic separator. A top seat is fixedly connected to the end of the bracket. The top seat is located above the magnetic separator. A motor is fixedly installed in the middle of the upper end of the top seat. The output shaft of the motor passes through the top seat and is connected to the top seat through a bearing. A square shaft is fixedly connected to the end of the output shaft. A bushing is slidably connected to the outer side of the square shaft. A vortex seat is fixedly connected to the end of the bushing. The vortex seat is located inside the electromagnetic cylinder.

2. The battery-grade lithium carbonate demagnetizing device according to claim 1, characterized in that: The number of supports is set to multiple, and the multiple supports are distributed in a ring array along the circumference of the magnetic separator.

3. The battery-grade lithium carbonate demagnetizing device according to claim 1, characterized in that: The swirl seat is frustum-shaped, and multiple swirl bars are fixedly connected to the inclined surface of the swirl seat.

4. The battery-grade lithium carbonate demagnetizing device according to claim 1, characterized in that: A linkage seat is mounted on the upper outer side of the bushing via a bearing. Two fixing rods are fixedly connected to the bottom of the linkage seat. A scraper ring is fixedly connected to the ends of the two fixing rods. The outer ring wall of the scraper ring is slidably connected to the inner wall of the electromagnetic cylinder. An electric push rod is fixedly mounted on the upper right side of the top seat. The telescopic shaft of the electric push rod passes through the top seat and is slidably connected to the top seat. The end of the telescopic shaft is fixedly connected to the linkage seat.

5. A battery-grade lithium carbonate demagnetizing device according to claim 4, characterized in that: A guide rod is fixedly connected to the upper left side of the linkage seat. The guide rod passes through the top seat and is slidably connected to the top seat.

6. The battery-grade lithium carbonate demagnetizing device according to claim 1, characterized in that: A flow guide shroud is fixedly connected to the inner side of the upper opening of the magnetic separator, and the narrow opening of the flow guide shroud corresponds to the position of the cyclone seat.

7. The battery-grade lithium carbonate demagnetizing device according to claim 1, characterized in that: Multiple support legs are fixedly connected to the lower outer side of the magnetic separator, and the multiple support legs are arranged in a ring array along the circumference of the magnetic separator.

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