A reaction kettle for preparing battery-grade trimanganese tetraoxide

Abstract

The present application relates to battery material preparation equipment technical field, specifically to a kind of preparation battery-grade four oxidation three manganese's reaction kettle, including kettle body, the kettle body top is provided with feed inlet and stirring motor, the kettle body bottom is provided with discharge port, the kettle body inside is also provided with stirring assembly, the stirring assembly includes with the stirring motor output end fixed stirring shaft, stirring paddle is fixed on the stirring shaft, the kettle body outside is equipped with jacket, the jacket is equipped with water inlet and water outlet, the kettle body outside is also provided with control panel, the kettle body inside is also equipped with temperature sensor, pH sensor, the temperature sensor, pH sensor and stirring motor are electrically connected with control panel, the kettle body is equipped with air pressure gas inlet structure. Reaction temperature and pH value can be accurately controlled, improve stirring uniformity, make air pressure gas and material fully contact reaction simultaneously, reduce air pressure gas waste, ensure product quality.

Description

Technical Field

[0001] This invention relates to the field of battery material preparation equipment technology, specifically to a reaction vessel for preparing battery-grade manganese tetroxide. With the widespread application of lithium-ion batteries in new energy vehicles, energy storage, and other fields, the demand for battery-grade manganese tetroxide, a key cathode material, is increasing daily, and the quality requirements are becoming increasingly stringent, prompting continuous innovation in related preparation equipment. Background Technology

[0002] Manganese tetroxide (MnO) is an important battery material, widely used in the preparation of cathode materials for lithium-ion batteries. Battery-grade MnO has extremely high requirements for purity and particle size distribution, therefore, the reaction conditions must be strictly controlled during the preparation process. The reaction vessel is a key piece of equipment in the preparation of MnO, and its performance directly affects the product quality.

[0003] Currently, existing reactors used for preparing manganese tetroxide have the following problems: First, the reaction temperature control is not precise enough, easily leading to incomplete reactions or unstable product properties. For example, the heating or cooling methods of traditional reactors are often crude and cannot accurately respond to subtle temperature changes during the reaction. When the temperature is too high, side reactions may occur, reducing product purity; when the temperature is too low, the reaction rate will slow down or even stop. Second, the stirring uniformity is poor, resulting in insufficient mixing of materials, affecting the reaction rate and product purity. Common stirring devices can only achieve stirring in a single direction or a limited area, failing to ensure uniform mixing of materials throughout the reactor, leading to local over- or under-reaction. Third, the pH value of the reaction system cannot be monitored in real time, making it difficult to ensure that the reaction proceeds under optimal pH conditions. Since the preparation reaction of manganese tetroxide is sensitive to pH, deviations in pH value will seriously affect the crystal form and properties of the product. However, existing reactors lack effective real-time monitoring methods, making it difficult for operators to adjust the reaction in a timely manner according to the reaction progress. Fourth, in processes requiring compressed air to participate in the reaction, improper design of the compressed air pipeline leads to insufficient contact between the compressed air and the materials, resulting in low reaction efficiency and a large amount of compressed air being discharged without participating in the reaction, causing waste. These problems will all result in the prepared manganese tetroxide failing to meet the requirements for battery-grade use.

[0004] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction vessel for preparing battery-grade manganese tetroxide, which can precisely control the reaction temperature and pH value, improve the uniformity of stirring, and at the same time ensure that compressed air and materials are in full contact and react, reduce the waste of compressed air, and ensure product quality.

[0006] This invention can be achieved through the following technical solutions:

[0007] This invention discloses a reactor for preparing battery-grade manganese tetroxide, comprising a reactor body, an inlet and a stirring motor at the top of the reactor body, an outlet at the bottom of the reactor body, and a stirring assembly inside the reactor body. The stirring assembly includes a stirring shaft fixed to the output end of the stirring motor, and a stirring paddle fixed on the stirring shaft. A jacket is fitted around the outside of the reactor body, and a water inlet and an outlet are provided on the jacket. A control panel is also provided outside the reactor body. A temperature sensor and a pH sensor are also provided inside the reactor body. The temperature sensor, pH sensor, and stirring motor are all electrically connected to the control panel. An air compressor inlet structure is provided on the reactor body, including an air compressor inlet pipe and a distributor. One end of the air compressor inlet pipe extends into the reactor body and is connected to the distributor, and the other end is connected to an air compressor source. A flow control valve is provided on the air compressor inlet pipe, and the flow control valve is electrically connected to the control panel.

[0008] Preferably, a solenoid valve is installed at the discharge port, and the solenoid valve is electrically connected to the control panel. The solenoid valve can be remotely controlled to open and close via the control panel, achieving automated discharge operation. After the reaction is complete, the operator can control the discharge with a single button on the control panel according to the production process, improving production efficiency and reducing human error. Simultaneously, the rapid response characteristic of the solenoid valve ensures a quick and accurate discharge process, facilitating seamless integration with subsequent production processes.

[0009] Preferably, the agitator comprises an upper agitator and a lower agitator, wherein the upper agitator is an inclined blade agitator and the lower agitator is an anchor blade agitator. This combined design allows for thorough mixing of materials in the upper, lower, and bottom regions. When the upper inclined blade agitator rotates, its tilt angle tumbles the material upwards, promoting vertical convection; the lower anchor blade agitator closely adheres to the bottom of the vessel, scraping and stirring the material at the bottom to prevent accumulation and ensure uniform mixing throughout the vessel.

[0010] The upper agitator has an inclination angle of 45°-60°. This angle range has been verified through extensive experiments, ensuring effective mixing while minimizing energy loss during the mixing process. At this angle, the upward force exerted by the inclined blades on the material is well balanced with the material's own weight, effectively improving mixing efficiency. The lower agitator is adapted to the bottom of the vessel. The shape and size of the anchor-type blade are customized according to the bottom contour of the vessel, fully covering the bottom area and ensuring thorough agitation of the material.

[0011] Preferably, the jacket is equipped with a guide plate, which is spirally arranged along the inner wall of the jacket. The spiral structure of the guide plate guides the heating or cooling medium to flow in a spiral path within the jacket, significantly increasing the contact time and contact area between the medium and the vessel. Compared to traditional jacket structures, the medium, under the action of the spiral guide plate, can heat or cool the vessel more uniformly, resulting in a more uniform temperature distribution within the vessel and thus improving the accuracy of temperature control. For example, when rapid heating is required in the initial stage of the reaction, the spiral guide plate can accelerate heat transfer, allowing the vessel to quickly reach the reaction temperature; when a constant temperature needs to be maintained during the reaction, it can stabilize heat exchange and prevent temperature fluctuations.

[0012] Preferably, the top of the vessel is also provided with a vent, and a filter device is installed on the vent. Gases are generated during the reaction, and the vent can promptly release these gases, preventing excessive pressure inside the vessel and ensuring the safe conduct of the reaction. The filter device effectively filters out tiny particles and impurities in the discharged gas, preventing contamination of the external environment and preventing impurities from flowing back into the vessel, thus ensuring the purity of the reaction system and maintaining the stability of the reaction.

[0013] Preferably, the vessel body is made of stainless steel. Stainless steel has good strength and corrosion resistance, and can withstand the pressure and chemical corrosion during the reaction process. The inner wall of the vessel body is provided with an anti-corrosion coating, which further enhances the corrosion resistance to the reactants. The anti-corrosion coating adopts a special formula, which can effectively resist the erosion of acidic or alkaline materials during the preparation of manganese tetroxide, extend the service life of the reactor, and at the same time avoid contamination of the reactants by the vessel body material, ensuring the stability of product quality.

[0014] Preferably, the temperature sensor employs a spring-loaded sensing element. The spring-loaded structure provides excellent shock resistance, ensuring stable operation even under stirring or other mechanical vibrations during reactor operation, thus guaranteeing accurate temperature measurement. The temperature sensor is also connected to an explosion-proof junction box with an explosion-proof rating of EXdⅡCT6, allowing safe use in flammable and explosive environments. This adapts to the potentially hazardous environments present during the preparation of manganese tetroxide, ensuring safe equipment operation.

[0015] Preferably, the pH sensor is a model suitable for harsh environments, using a polymer as the internal solution, with a large liquid interface (1.0mm-1.5mm) and two single-hole ports. This design effectively prevents clogging, ensuring stable pH monitoring of the reaction system even in the presence of impurities or particles. The large liquid interface and dual single-hole structure increase the contact area between the sensor and the reaction solution, improving signal response speed and measurement accuracy, ensuring that operators can obtain accurate pH information in a timely manner for precise control of the reaction.

[0016] Preferably, the distributor has a ring-shaped structure and uniformly distributed air outlets with a diameter of 0.5mm-1mm. The distributor is located inside the vessel body at the lower part, below the lowest liquid level of the material. The ring-shaped distributor allows compressed air to be uniformly sprayed from multiple directions, and the small air outlets disperse the compressed air into a large number of small bubbles, increasing the contact area with the material. Because the distributor is located below the material, the compressed air bubbles can fully contact the material as they rise, improving reaction efficiency.

[0017] Preferably, the portion of the air inlet pipe outside the reactor body is equipped with a gas preheater, which is electrically connected to the control panel. This preheater can preheat the compressed air to a temperature close to the reaction temperature inside the reactor. This prevents low-temperature compressed air from affecting the stability of the reaction temperature after entering the reactor, and the preheated compressed air is more likely to react with the materials.

[0018] Preferably, the vessel body is further equipped with baffles, which are strip-shaped plates, numbered 3-6, and evenly distributed along the circumference of the inner wall of the vessel. The height of the baffles is 1 / 3-1 / 2 of the vessel height, and the baffles form an angle of 15°-30° with the vessel axis. This structural design can obstruct and divert the flow of materials when they are stirred, breaking up any potential local circulation and allowing the materials to form more diverse convection and turbulence, further improving the mixing uniformity.

[0019] Working Principle: During operation, the reactants are added to the reactor through the feed inlet. The stirring motor is then started, driving the stirring shaft and impeller to rotate and agitate the materials. The upper inclined blades tumble the materials upwards, while the lower anchor blades stir the materials at the bottom of the reactor. During this agitation, baffles within the reactor obstruct and divert the flowing materials, creating a more complex flow pattern and achieving comprehensive and uniform mixing within the reactor. Simultaneously, heating or cooling media are introduced through the jacket inlet and discharged through the outlet, regulating the internal temperature of the reactor. A temperature sensor monitors the internal temperature in real time and transmits the signal to the control panel. The control panel automatically adjusts the flow rate of the heating or cooling media according to the set temperature to ensure stable reaction temperature. For example, when the temperature sensor detects that the internal temperature is lower than the set value, the control panel opens the jacket inlet valve wider, increasing the flow rate of the heating media and accelerating the heating process; conversely, when the temperature is higher than the set value, the flow rate of the heating media is reduced or cooling media is introduced. The pH sensor monitors the pH value of the reaction system in real time and transmits the signal to the control panel. The operator can add the appropriate regulator through the feed inlet according to the pH value displayed on the control panel to maintain the optimal pH value of the reaction system.

[0020] When compressed air needs to be introduced, the control panel opens the flow control valve, allowing the compressed air to enter the gas preheater through the air inlet pipe. After being preheated to the set temperature, the air enters the distributor and disperses into small bubbles through the outlet, entering the material for thorough contact and reaction. The control panel can adjust the opening of the flow control valve according to the reaction progress to control the amount of compressed air introduced. Gas generated during the reaction is discharged through the vent. After the reaction is complete, the control panel opens the solenoid valve, allowing the material to be discharged from the outlet. Throughout the process, the PLC on the control panel stores and analyzes the operating data of each device, providing a basis for subsequent process optimization.

[0021] Compared with existing technologies, the present invention has the following advantages:

[0022] 1. This invention, by incorporating a temperature sensor and a jacket, enables real-time monitoring of the reaction temperature and precise temperature regulation via the medium within the jacket, ensuring the reaction proceeds at a suitable temperature, which is beneficial for improving the reaction rate and product quality. The spiral guide plate inside the jacket further optimizes the heat exchange process, making temperature control more precise. Compared to traditional reactors, temperature fluctuations can be reduced to within ±1℃, significantly improving reaction stability.

[0023] 2. The stirring assembly adopts a combination structure of an upper inclined blade impeller and a lower anchor impeller. Combined with a baffle plate inside the vessel, the upper inclined blade impeller tumbles the material upwards, while the lower anchor impeller stirs the material at the bottom of the vessel. The baffle plate breaks up localized material circulation, improving stirring uniformity and ensuring more thorough mixing, thereby increasing product purity. Experimental verification shows that using the stirring assembly and baffle plate of this invention improves material mixing uniformity by more than 45% compared to traditional stirring methods, effectively reducing product impurities caused by uneven material mixing and improving the purity of manganese tetroxide.

[0024] 3. The jacket is equipped with a spiral guide plate, which allows the medium to flow along a spiral path within the jacket. This increases the contact time and area between the medium and the reactor body, improves heat transfer efficiency, and further ensures the accuracy of temperature control. This design improves the heat transfer efficiency of the jacket by 20%-30%, ensuring stable reaction temperature while saving energy, thus guaranteeing the preparation of high-quality products.

[0025] 4. A vent is installed at the top of the reactor body to promptly release gases generated during the reaction, preventing excessive internal pressure. A filter device on the vent prevents external impurities from entering the reactor, ensuring the purity of the reaction system. The filter device has a filtration efficiency of over 99%, effectively blocking impurities from interfering with the reaction system, thus improving reaction stability and product quality.

[0026] 5. The discharge port is controlled by a solenoid valve and electrically connected to the control panel, facilitating automated operation and improving production efficiency. Automated discharge operation can precisely control the discharge time to the second level, increasing efficiency several times compared to manual discharge and reducing errors caused by manual operation, which is beneficial for large-scale industrial production.

[0027] 6. The reactor body is made of stainless steel with an anti-corrosion coating, providing excellent corrosion resistance, extending the reactor's service life, and preventing contamination of the reactants by the reactor body material. Practical application has verified that the reactor of this invention has a service life at least 50% longer than ordinary reactors, reducing equipment replacement frequency and saving production costs.

[0028] 7. The pH sensor employs a special design to effectively prevent clogging and ensure stable monitoring of the pH value of the reaction system. Even in complex reaction systems, it can provide real-time and accurate pH feedback, offering operators a reliable basis for timely adjustments to reaction conditions, ensuring the reaction proceeds at the optimal pH level, and improving product quality.

[0029] 8. In the compressed air introduction structure, the annular distributor and small air outlets disperse the compressed air into a large number of small bubbles, increasing the contact area with the material. The distributor is located below the material, ensuring full contact between the rising bubbles and the material, significantly improving reaction efficiency and reducing the waste of unreacted compressed air. Tests have shown that the compressed air utilization rate is more than 40% higher than traditional introduction methods.

[0030] 9. The gas preheater can preheat the compressed air to near the reaction temperature, avoiding affecting the temperature stability inside the reactor, while improving the reaction activity and further ensuring the reaction effect.

[0031] 10. The flow control valve is connected to the control panel, which can accurately adjust the amount of compressed air supplied according to the reaction requirements, avoiding excessive supply and waste, and achieving energy-saving and efficient production.

[0032] 11. The baffle plate can effectively break the local circulation during material mixing, increase the turbulence of the material, and enable the material to reach a uniform mixing state in a shorter time, shorten the reaction time, improve production efficiency, and at the same time reduce the local reaction differences caused by uneven mixing, ensuring the consistency of product quality. Attached Figure Description

[0033] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] In the diagram: 1. Vessel body; 2. Stirring motor; 3. Solenoid valve; 4. Stirring shaft; 5. Inclined blade impeller; 6. Anchor impeller; 7. Jacket; 8. Inlet; 9. Outlet; 10. Baffle plate; 11. Temperature sensor; 12. pH sensor; 13. Baffle plate; 14. Air inlet pipe; 15. Distributor; 16. Flow control valve; 17. Gas preheater; 18. Vent. Detailed Implementation

[0036] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0037] Example 1:

[0038] like Figure 1 As shown in the figure, this embodiment discloses a reactor for preparing battery-grade manganese tetroxide, including a reactor body 1. The top of the reactor body 1 is provided with a feed inlet and a stirring motor 2, and the bottom of the reactor body 1 is provided with a discharge outlet. The reactor body 1 is also provided with a stirring assembly, which includes a stirring shaft 4 fixed to the output end of the stirring motor 2. A stirring paddle is fixed on the stirring shaft 4. A jacket 7 is provided on the outside of the reactor body 1. The jacket 7 is provided with a water inlet 8 and a water outlet 9. A control panel is also provided on the outside of the reactor body 1. A temperature sensor 11 and a pH sensor 12 are also provided inside the reactor body 1. The temperature sensor 11, pH sensor 12 and stirring motor 2 are all electrically connected to the control panel. The reactor body 1 is provided with a compressed air inlet structure, which includes a compressed air inlet pipe 14 and a distributor 15. One end of the compressed air inlet pipe 14 extends into the interior of the reactor body 1 and is connected to the distributor 15. The other end is connected to a compressed air source. A flow control valve 16 is provided on the compressed air inlet pipe 14 and is electrically connected to the control panel.

[0039] The discharge port is equipped with a solenoid valve 3, which is electrically connected to the control panel. The solenoid valve 3 can be remotely controlled to open and close, enabling automated discharge. After the reaction is complete, operators can control the discharge with a single button on the control panel according to the production schedule, improving production efficiency and reducing human error. Simultaneously, the rapid response of the solenoid valve 3 ensures a swift and precise discharge process, facilitating seamless integration with subsequent production steps.

[0040] The mixing impeller comprises an upper impeller and a lower impeller. The upper impeller is a slanted blade impeller 5, and the lower impeller is an anchor impeller 6. This combined design ensures that the material is fully mixed in the upper, lower, and bottom areas. When the upper slanted blade impeller 5 rotates, its tilt angle causes the material to be turned upwards, promoting vertical convection. The lower anchor impeller 6 fits closely to the bottom of the vessel 1, scraping and mixing the material at the bottom to prevent accumulation and ensure uniform mixing throughout the vessel 1.

[0041] The upper agitator has an inclination angle of 45°-60°. This angle range has been verified through extensive experiments, ensuring effective mixing while minimizing energy loss during the mixing process. At this angle, the upward force exerted by the inclined blade 5 on the material is well balanced with the material's own weight, effectively improving the mixing efficiency. The lower agitator is adapted to the bottom of the vessel body 1. The shape and size of the anchor blade 6 are customized according to the bottom contour of the vessel body 1, fully covering the bottom area and ensuring that the material at the bottom is thoroughly agitated.

[0042] The jacket 7 is equipped with a guide plate 10, which is spirally arranged along the inner wall of the jacket 7. The spiral structure of the guide plate 10 guides the heating or cooling medium to flow in a spiral path within the jacket 7, significantly increasing the contact time and contact area between the medium and the vessel body 1. Compared with the traditional jacket 7 structure, the medium can heat or cool the vessel body 1 more evenly under the action of the spiral guide plate 10, making the temperature distribution within the vessel body 1 more uniform, thereby improving the accuracy of temperature control. For example, when rapid heating is required in the initial stage of the reaction, the spiral guide plate 10 can accelerate heat transfer, allowing the vessel body 1 to quickly reach the reaction temperature; when a constant temperature needs to be maintained during the reaction, it can stabilize heat exchange and prevent temperature fluctuations.

[0043] The reactor body 1 is made of stainless steel. Stainless steel has good strength and corrosion resistance, and can withstand the pressure and chemical corrosion during the reaction process. The inner wall of reactor body 1 is equipped with an anti-corrosion coating, which further enhances the corrosion resistance to the reactants. The anti-corrosion coating uses a special formula to effectively resist the erosion of acidic or alkaline materials during the preparation of manganese tetroxide, extending the service life of the reactor, while preventing the material of reactor body 1 from contaminating the reactants and ensuring the stability of product quality.

[0044] The temperature sensor 11 employs a spring-loaded sensing element. This spring-loaded structure provides excellent shock resistance, ensuring stable operation even under stirring or other mechanical vibrations during reactor operation, thus guaranteeing accurate temperature measurements. The temperature sensor 11 is also connected to an explosion-proof junction box with an explosion-proof rating of EXdⅡCT6, allowing for safe use in flammable and explosive environments. This adapts to the potentially hazardous conditions present during the preparation of manganese tetroxide, ensuring safe equipment operation.

[0045] The pH sensor 12 is designed for harsh environments, using a polymer as the internal solution and featuring a large liquid interface (1.0mm-1.5mm) with two single-hole ports. This design effectively prevents clogging, ensuring stable pH monitoring of the reaction system even in the presence of impurities or particles. The large liquid interface and dual single-hole structure increase the contact area between the sensor and the reaction solution, improving signal response speed and measurement accuracy. This ensures operators can obtain accurate pH information promptly for precise reaction control.

[0046] The distributor 15 has a ring-shaped structure and is equipped with evenly distributed air outlets, each with a diameter of 0.5mm-1mm. The distributor 15 is located inside the vessel body 1, below the lowest liquid level of the material. The ring-shaped distributor 15 allows compressed air to be evenly ejected from multiple directions, and the small air outlets disperse the compressed air into numerous small bubbles, increasing the contact area with the material. Because the distributor 15 is located below the material, the compressed air bubbles can fully contact the material as they rise, improving reaction efficiency.

[0047] The portion of the air inlet pipe 14 outside the reactor body 1 is equipped with a gas preheater 17, which is electrically connected to the control panel. This preheater can preheat the compressed air to a temperature close to the reaction temperature inside the reactor. This prevents the low-temperature compressed air from affecting the stability of the reaction temperature after entering the reactor body 1, and the preheated compressed air is more likely to react with the materials.

[0048] Example 2:

[0049] This embodiment discloses a reactor for preparing battery-grade manganese tetroxide. Based on the structure and principle of Embodiment 1, this embodiment further includes baffles 13 fixed inside the reactor body 1. The baffles 13 are strip-shaped plates, numbered 3-6, and evenly distributed circumferentially along the inner wall of the reactor body 1. The height of the baffles 13 is 1 / 3-1 / 2 of the height of the reactor body 1, and the baffles 13 form an angle of 15°-30° with the axis of the reactor body 1. This structural design can obstruct and divert the flow of materials during stirring, breaking up any potential local circulation and allowing the materials to form more diverse convection and turbulence, further improving mixing uniformity.

[0050] Example 3:

[0051] This embodiment discloses a reaction vessel for preparing battery-grade manganese tetroxide. Based on the structure and principle of Embodiment 1 or Embodiment 2, the top of the vessel body 1 in this embodiment is further provided with a vent 18, and a filter device is installed on the vent 18. Gases are generated during the reaction, and the vent 18 can promptly discharge these gases to prevent excessive pressure inside the vessel body 1 and ensure the safe conduct of the reaction. The filter device can effectively filter out tiny particles and impurities in the discharged gas, avoiding contamination of the external environment, and preventing impurities from flowing back into the vessel body 1, ensuring the purity of the reaction system and maintaining the stability of the reaction.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reaction vessel for preparing battery-grade manganese tetroxide, characterized in that, The device includes a vessel body, with a feed inlet and a stirring motor at the top and a discharge outlet at the bottom. An stirring assembly is also installed inside the vessel body, comprising a stirring shaft fixed to the output end of the stirring motor, and a stirring paddle fixed on the stirring shaft. A jacket is fitted around the outside of the vessel body, with a water inlet and an outlet on the jacket. A control panel is also installed outside the vessel body. A temperature sensor and a pH sensor are installed inside the vessel body, and the temperature sensor, pH sensor, and stirring motor are all electrically connected to the control panel. An air compressor inlet structure is provided on the vessel body, including an air compressor inlet pipe and a distributor. One end of the air compressor inlet pipe extends into the vessel body and connects to the distributor, while the other end connects to an air compressor source. A flow control valve is installed on the air compressor inlet pipe, and the flow control valve is electrically connected to the control panel.

2. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: A solenoid valve is installed on the discharge port, and the solenoid valve is electrically connected to the control panel.

3. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The agitator includes an upper agitator and a lower agitator. The upper agitator is a slanted blade agitator, and the lower agitator is an anchor blade agitator.

4. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The jacket is equipped with a guide plate, which is spirally arranged along the inner wall of the jacket.

5. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The top of the vessel is also equipped with a vent, and a filter device is installed on the vent.

6. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The vessel body is made of stainless steel.

7. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The temperature sensor uses a spring-loaded temperature sensing element.

8. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The distributor has a ring structure and is provided with air outlets evenly spaced on it, with the diameter of the air outlets being 0.5mm-1mm.

9. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The portion of the air inlet pipe outside the vessel body is equipped with a gas preheater, which is electrically connected to the control panel.

10. The reaction vessel for preparing battery-grade manganese tetroxide according to claim 1, characterized in that: The vessel body is also fixed with a baffle plate, which is a strip-shaped plate structure.

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