A continuous graphite purification apparatus

Abstract

The application relates to the technical field of graphite purification, in particular to a continuous graphite purification equipment which comprises a preheating tank, an expanded bottom cover, a high-temperature furnace body, a magnetic separator, a notched support, a heating and mixing assembly and a conveying assembly. The continuous graphite purification equipment of the application forcibly stirs the material through the heating and mixing assembly and the guide disc to make the material continuously exchange positions, eliminates the temperature difference between the center and the edge and between the upper layer and the lower layer in the traditional static preheating, ensures that each particle can be uniformly heated, and the uniform heat transfer makes the moisture and low-boiling-point impurities such as sulfur and nitrogen compounds more fully and more synchronously volatilize and remove; after the graphite material is completed high-temperature purification, the graphite material is immediately treated by the magnetic separator at the first time of furnace discharge conveying, and the magnetic separation is immediately performed at the furnace discharge opening, so that the newly introduced iron impurities can be efficiently removed, the iron impurities are prevented from entering the subsequent packaging or processing links, and the ultrahigh purity of the final product is ensured.

Description

Technical Field

[0001] This application relates to the field of graphite purification technology, and in particular to a continuous graphite purification device. Background Technology

[0002] Graphite is an important non-metallic mineral product needed for national economic development. It is one of the crystalline minerals of carbon and has excellent properties such as lubricity, chemical stability, high temperature resistance, electrical conductivity, special thermal conductivity, plasticity, and coating properties. It has a wide range of applications. In the metallurgical industry, graphite can be used as a refractory material. In the foundry industry, it can be used as a mold and anti-rust coating. In the electrical industry, it can be used to produce carbon electrodes, carbon electrode rods, and batteries. Graphite emulsions can be used as coatings for television picture tubes, and carbon products can be used in generators, motors, communication equipment, etc.

[0003] A search revealed that CN219664582U discloses a spherical graphite purification device. The device involves sequentially injecting spherical graphite and water into a rotating drum via a feed pipe. A drive motor is then activated to rotate the drive gears, which in turn rotate the stirring shaft and blades via driven gears, thus washing the spherical graphite until its pH value reaches neutral. After washing, the drive motor is turned off, and two second solenoid valves are opened to drain the washing water from the shell and drum through two drain pipes. Simultaneously, two handwheels are turned to rotate two rotating shafts and two drive bevel gears, which in turn rotate two threaded rods via driven bevel gears. During rotation, the threaded rods cause two traction blocks and two locking blocks to move relative to each other, allowing the locking blocks to move from the first locking slot to the second locking slot, thus securing the drum and stirring shaft. The drive motor is then restarted, and the rotating shaft rotates synchronously with the drum. Under centrifugal force, the washed spherical graphite undergoes water separation on the inner wall of the drum.

[0004] Regarding the aforementioned technologies, the inventors believe the following technical defects require improvement: The continuous purification of the above-mentioned device focuses on continuity, i.e., achieving automatic feeding and discharging of materials. The main function of its preheating zone is considered simple physical dehydration, removing moisture adsorbed on the graphite surface. However, this approach results in some material impurities not being fully vaporized, and others potentially being overburned. Furthermore, at high temperatures, iron reacts catalytically with graphite, promoting its oxidation and vaporization. This not only contaminates the product but also severely corrodes the expensive graphite heating element and insulation layer, shortening the core lifespan of the equipment. Utility Model Content

[0005] This application provides a continuous graphite purification device to address the following technical problems: the main function of the preheating zone is considered to be simple physical dehydration, removing moisture adsorbed on the graphite surface. Some material impurities fail to fully vaporize, while others may have been overburned. Furthermore, at high temperatures, iron reacts catalytically with graphite, promoting its oxidation and vaporization. This not only contaminates the product but also severely corrodes the expensive graphite heating element and insulation layer, shortening the core lifespan of the equipment.

[0006] This application provides a continuous graphite purification device, which adopts the following technical solution:

[0007] A continuous graphite purification device includes a preheating tank, a flared bottom cover, a high-temperature furnace, a magnetic separator, a grooved support, a heating and mixing assembly, and a conveying assembly. The flared bottom cover is fixedly connected to the bottom of the preheating tank, the conveying assembly is installed at the bottom of the flared bottom cover, the high-temperature furnace is installed below the output end of the conveying assembly, the heating and mixing assembly is installed inside the preheating tank, the grooved support is located outside the output end of the high-temperature furnace, and the magnetic separator is installed inside the grooved support.

[0008] In one feasible technical solution of this application, the heating and mixing assembly includes an H-shaped rotating frame, a pushing cylinder, a sliding block, and a mixing rod. The H-shaped rotating frame is movably connected to the inner top of the preheating tank. The pushing cylinder is installed on the outer side of the protruding end of the H-shaped rotating frame. The sliding block is fixedly connected to the outer side of the output end of the pushing cylinder and slidably connected to the inner bottom of the H-shaped rotating frame. The mixing rod is fixedly connected to the bottom of the sliding block.

[0009] In one feasible technical solution of this application, the conveying assembly includes a support frame, a conveying pipe, a DC motor, and an auger conveying rod. The support frame is sleeved on the outside of the conveying pipe, the DC motor is installed on the bottom outside of the conveying pipe, the auger conveying rod is rotatably connected inside the conveying pipe, and the bottom discharge end of the conveying pipe is fixedly connected to the input end surface of the high-temperature furnace body.

[0010] In one feasible technical solution of this application, the bottom of the preheating tank is further provided with a stepper motor, a corrosion-resistant shaft and a guide plate. The stepper motor is installed on the outside of the preheating tank, the corrosion-resistant shaft is fixedly connected to the outside of the output end of the stepper motor, and the guide plate is sleeved on the outside of the corrosion-resistant shaft and is used to receive graphite material and guide the dried graphite material into the flared bottom cover.

[0011] In one feasible technical solution of this application, the bottom inner side of the H-shaped rotating frame is further provided with a transverse groove for limiting the movement path of the sliding block.

[0012] In one feasible technical solution of this application, a belt conveyor for conveying impurity-removing graphite particles is also installed on the outer bottom of the slotted bracket.

[0013] In one feasible technical solution of this application, an inclined material plate and a cooling chamber are further provided above the slot of the slotted support. The top of the inclined material plate is connected to the bottom of the output end of the cooling chamber, and the cooling chamber is connected to the outside of the output end of the high-temperature furnace body through a pipe.

[0014] In one feasible technical solution of this application, the top of the preheating tank is further provided with a dust cover, an asynchronous motor, a drive shaft, a connecting shaft, and a transmission gear. The dust cover is fixedly connected to the top of the preheating tank, the asynchronous motor is installed on the top of the dust cover, the drive shaft is rotatably connected to the inside of the dust cover, the connecting shaft passes through the dust cover and the inner wall of the top of the preheating tank and is fixedly connected to the middle of the H-shaped rotating frame, and the transmission gear is meshed with the outside of the drive shaft and the connecting shaft.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This device uses a heating and mixing component combined with a guide plate to forcefully stir the material, causing continuous exchange of positions. This eliminates the temperature differences between the center and edge, and between the upper and lower layers, that exist in traditional static preheating. This ensures that each particle is heated evenly, and the uniform heat transfer allows moisture and low-boiling-point impurities such as sulfur and nitrogen compounds to evaporate and be removed more fully and synchronously. The screw conveyor effectively isolates air, preventing the preheated graphite from oxidizing before entering the high-temperature furnace. After high-temperature purification, the graphite material undergoes magnetic separation immediately upon exiting the furnace. This immediate magnetic separation at the furnace outlet efficiently removes newly introduced iron impurities, preventing them from entering subsequent packaging or processing stages and ensuring the ultra-high purity of the final product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a continuous graphite purification device according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the cross-section of the preheating tank in an embodiment of this application.

[0020] Figure 3This is a distribution diagram of the dust cover and transmission gears in the embodiments of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the heating and mixing component in the embodiments of this application.

[0022] Figure 5 This is a schematic diagram of the structure of the conveying component in the embodiments of this application.

[0023] Figure 6 yes Figure 1 Enlarged view of section A.

[0024] Figure 7 yes Figure 4 Enlarged view of section B.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Preheating tank; 2. Flared bottom cover; 3. High-temperature furnace body; 4. Magnetic separator; 5. Support with slotted opening;

[0027] 6. Heating and mixing assembly; 61. H-shaped rotating frame; 62. Push cylinder; 63. Sliding block; 64. Mixing rod;

[0028] 7. Conveying assembly; 71. Support frame; 72. Conveying pipe; 73. DC motor; 74. Screw conveyor rod;

[0029] 8. Stepper motor; 9. Corrosion-resistant shaft; 10. Guide plate; 11. Horizontal trough; 12. Belt conveyor; 13. Inclined plate; 14. Dust cover; 15. Asynchronous motor; 16. Drive shaft; 17. Connecting shaft; 18. Transmission gear; 19. Cooling chamber. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a continuous graphite purification device. (Refer to...) Figures 1 to 6 The continuous graphite purification equipment includes a preheating tank 1, a flared bottom cover 2, a high-temperature furnace body 3, a magnetic separator 4, a grooved support 5, a heating and mixing assembly 6, and a conveying assembly 7. The flared bottom cover 2 is fixedly connected to the bottom of the preheating tank 1. The conveying assembly 7 is installed at the bottom of the flared bottom cover 2. The high-temperature furnace body 3 is installed below the output end of the conveying assembly 7. The heating and mixing assembly 6 is installed inside the preheating tank 1. The grooved support 5 is set outside the output end of the high-temperature furnace body 3. The magnetic separator 4 is installed inside the grooved support 5.

[0036] The heating and mixing assembly 6 includes an H-shaped rotating frame 61, a pushing cylinder 62, a sliding block 63, and a mixing rod 64. The H-shaped rotating frame 61 is movably connected to the inner top of the preheating tank 1. The pushing cylinder 62 is installed on the outer side of the protruding end of the H-shaped rotating frame 61. The sliding block 63 is fixedly connected to the outer side of the output end of the pushing cylinder 62 and is slidably connected to the inner bottom of the H-shaped rotating frame 61. The mixing rod 64 is fixedly connected to the bottom of the sliding block 63.

[0037] Forced stirring constantly exchanges the positions of the materials, eliminating the temperature differences between the center and edges, and between the upper and lower layers, that exist in traditional static preheating. This ensures that every particle is heated evenly. Uniform heat transfer allows moisture and low-boiling-point impurities to evaporate and be removed more fully and synchronously, laying a perfect foundation for subsequent high-temperature purification and completely avoiding localized under- or over-heating.

[0038] After the graphite material is purified at high temperature, it is processed by magnetic separator 4 immediately after exiting the furnace.

[0039] The conveying assembly 7 includes a support frame 71, a conveying pipe 72, a DC motor 73, and an auger conveying rod 74. The support frame 71 is sleeved on the outside of the conveying pipe 72. The DC motor 73 is installed on the bottom outside of the conveying pipe 72. The auger conveying rod 74 is rotatably connected to the inside of the conveying pipe 72. The bottom discharge end of the conveying pipe 72 is fixedly connected to the input end surface of the high-temperature furnace body 3.

[0040] The spiral conveyor system can effectively isolate air and prevent preheated graphite from oxidizing before entering the high-temperature furnace.

[0041] The bottom of the preheating tank 1 is also equipped with a stepper motor 8, a corrosion-resistant shaft 9, and a guide plate 10. The stepper motor 8 is installed on the outside of the preheating tank 1. The corrosion-resistant shaft 9 is fixedly connected to the outside of the output end of the stepper motor 8. The guide plate 10 is sleeved on the outside of the corrosion-resistant shaft 9 and is used to receive graphite material and guide the dried graphite material into the flared bottom cover 2.

[0042] The residence time of materials in the preheating tank 1 can be precisely controlled. Only when a batch of materials reaches the preset drying and preheating standards will the guide tray 10 rotate at an angle to send it to the next process. This achieves refined control of process parameters and ensures product consistency.

[0043] The bottom inner side of the H-shaped rotating frame 61 is also provided with a transverse groove 11 for restricting the movement path of the sliding block 63.

[0044] A belt conveyor 12 for conveying graphite particles to remove impurities is also installed on the outer side of the bottom of the slotted bracket 5.

[0045] An inclined material plate 13 and a cooling chamber 19 are also provided above the slot of the slotted bracket 5. The top of the inclined material plate 13 is connected to the bottom of the output end of the cooling chamber 19. The cooling chamber 19 is connected to the outside of the output end of the high-temperature furnace body 3 through a pipe.

[0046] By integrating preheating, mixing, conveying, high-temperature purification, and online magnetic separation into a single equipment system, the compact layout reduces pollution and loss caused by the transfer of materials between different devices.

[0047] The top of the preheating tank 1 is also equipped with a dust cover 14, an asynchronous motor 15, a drive shaft 16, a connecting shaft 17, and a transmission gear 18. The dust cover 14 is fixedly connected to the top of the preheating tank 1. The asynchronous motor 15 is installed on the top of the dust cover 14. The drive shaft 16 is rotatably connected to the inside of the dust cover 14. The connecting shaft 17 passes through the dust cover 14 and the inner wall of the top of the preheating tank 1 and is fixedly connected to the middle of the H-shaped rotating frame 61. The transmission gear 18 is meshed with the outside of the drive shaft 16 and the connecting shaft 17.

[0048] The operation process of the continuous graphite purification equipment in this embodiment is roughly as follows:

[0049] The graphite material to be purified is fed into the preheating tank 1. The DC motor 73 at the top of the preheating tank 1 is started, driving the H-shaped rotating frame 61 to rotate inside the tank via the drive shaft 16, transmission gear 18, and connecting shaft 17. At the same time, the push cylinder 62 installed on the H-shaped rotating frame 61 starts working, pushing the sliding block 63 to reciprocate along the path defined by the transverse groove 11. The mixing rod 64 at the bottom of the sliding block 63 thus performs a reciprocating scraping motion while revolving around the center of the tank, thereby fully agitating, mixing, and scraping the material inside the tank, ensuring uniform heating of the material, preventing agglomeration, and efficiently removing moisture and some volatile impurities.

[0050] During the feeding process, the stepper motor 8 at the bottom of the preheating tank 1 rotates intermittently according to the instructions, and drives the guide plate 10 to rotate at a specific angle through the corrosion-resistant shaft 9, so as to evenly guide the material to the inlet of the flared bottom cover 2 and realize quantitative feeding.

[0051] During the sealed conveying process, the material falls into the inlet of the conveying component 7 through the flared bottom cover 2. The DC motor 73 at the bottom of the conveying pipe 72 drives the auger conveying rod 74 to rotate, pushing the material forward stably and in a sealed manner, and finally accurately sending it from its bottom discharge end into the input end of the high temperature furnace body 3.

[0052] During the purification process, the material undergoes a preset high-temperature environment inside the high-temperature furnace 3 to complete the final purification process of graphite. Residual high-boiling-point impurities are completely vaporized and removed during this stage. The purified high-temperature graphite particles are discharged from the output end of the high-temperature furnace 3, first falling onto the inclined material plate 13 and sliding down it. The sliding material then passes through the slotted support 5, where the magnetic separator 4 immediately operates, efficiently adsorbing and removing trace amounts of mechanical iron and other magnetic impurities that may have been introduced during the conveying and high-temperature treatment process. The high-purity graphite particles after magnetic separation finally fall onto the belt conveyor 12 and are smoothly transported to the collection area, completing the entire continuous purification process.

[0053] The beneficial technical effects of the continuous graphite purification equipment in this application are roughly as follows:

[0054] This device uses a heating and mixing component 6 in conjunction with a guide plate 10 to forcefully stir the material, causing continuous exchange of positions. This eliminates the temperature differences between the center and edge, and between the upper and lower layers, that exist in traditional static preheating, ensuring that each particle is heated evenly. The uniform heat transfer allows moisture and low-boiling-point impurities such as sulfur and nitrogen compounds to evaporate and be removed more fully and synchronously. The screw conveyor effectively isolates air, preventing the preheated graphite from oxidizing before entering the high-temperature furnace. After high-temperature purification, the graphite material is processed by a magnetic separator 4 immediately upon exiting the furnace. Immediate magnetic separation at the furnace outlet can efficiently remove newly introduced iron impurities, preventing them from entering subsequent packaging or processing stages and ensuring the ultra-high purity of the final product.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A continuous graphite purification device, characterized in that, The assembly includes a preheating tank (1), a flared bottom cover (2), a high-temperature furnace body (3), a magnetic separator (4), a slotted bracket (5), a heating and mixing assembly (6), and a conveying assembly (7). The flared bottom cover (2) is fixedly connected to the bottom of the preheating tank (1). The conveying assembly (7) is installed at the bottom of the flared bottom cover (2). The high-temperature furnace body (3) is installed below the output end of the conveying assembly (7). The heating and mixing assembly (6) is installed inside the preheating tank (1). The slotted bracket (5) is located outside the output end of the high-temperature furnace body (3). The magnetic separator (4) is installed inside the slotted bracket (5).

2. The continuous graphite purification apparatus according to claim 1, wherein The heating and mixing assembly (6) includes an H-shaped rotating frame (61), a pushing cylinder (62), a sliding block (63), and a mixing rod (64). The H-shaped rotating frame (61) is movably connected to the inner top of the preheating tank (1). The pushing cylinder (62) is installed on the outer side of the protruding end of the H-shaped rotating frame (61). The sliding block (63) is fixedly connected to the outer side of the output end of the pushing cylinder (62) and slidably connected to the inner bottom of the H-shaped rotating frame (61). The mixing rod (64) is fixedly connected to the bottom of the sliding block (63).

3. The continuous graphite purification apparatus according to claim 1, wherein The conveying assembly (7) includes a support frame (71), a conveying pipe (72), a DC motor (73), and an auger conveying rod (74). The support frame (71) is sleeved on the outside of the conveying pipe (72). The DC motor (73) is installed on the bottom outside of the conveying pipe (72). The auger conveying rod (74) is rotatably connected inside the conveying pipe (72). The bottom discharge end of the conveying pipe (72) is fixedly connected to the input end surface of the high-temperature furnace body (3).

4. The continuous graphite purification apparatus according to claim 1, wherein The bottom of the preheating tank (1) is also provided with a stepper motor (8), a corrosion-resistant shaft (9) and a guide plate (10). The stepper motor (8) is installed on the outside of the preheating tank (1). The corrosion-resistant shaft (9) is fixedly connected to the outside of the output end of the stepper motor (8). The guide plate (10) is sleeved on the outside of the corrosion-resistant shaft (9) and is used to receive graphite material and guide the dried graphite material into the flared bottom cover (2).

5. The continuous graphite purification apparatus according to claim 2, wherein The bottom inner side of the H-shaped rotating frame (61) is also provided with a transverse groove (11) for restricting the movement path of the sliding block (63).

6. The continuous graphite purification apparatus according to claim 1, wherein The bottom outer side of the slotted bracket (5) is also equipped with a belt conveyor (12) for conveying graphite particles to remove impurities.

7. The continuous graphite purification apparatus according to claim 6, wherein An inclined material plate (13) and a cooling chamber (19) are also provided above the slot of the slotted bracket (5). The top of the inclined material plate (13) is connected to the bottom of the output end of the cooling chamber (19). The cooling chamber (19) is connected to the outside of the output end of the high-temperature furnace body (3) through a pipe.

8. The continuous graphite purification apparatus according to claim 2, wherein The top of the preheating tank (1) is also provided with a dust cover (14), an asynchronous motor (15), a driving shaft (16), a connecting shaft (17) and a transmission gear (18), the dust cover (14) is fixedly connected to the top of the preheating tank (1), the asynchronous motor (15) is installed on the top of the dust cover (14), the driving shaft (16) is rotatably connected to the inside of the dust cover (14), the connecting shaft (17) penetrates through the dust cover (14) and is fixedly connected to the inner wall of the top of the preheating tank (1) and the middle part of the H-shaped rotating frame (61), and the transmission gear (18) is meshedly connected to the outer sides of the driving shaft (16) and the connecting shaft (17).

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