Electrolytic manganese flake grinding device

Abstract

This utility model discloses an electrolytic manganese flake grinding device, including a grinding chamber and a multi-stage grinding assembly disposed within the grinding chamber for grinding materials sequentially from top to bottom. The multi-stage grinding assembly includes a rotating spindle and a primary grinding unit, a secondary grinding unit, and a fine grinding unit arranged sequentially from top to bottom along the rotating spindle. The grinding gaps of the primary grinding unit, the secondary grinding unit, and the fine grinding unit decrease progressively. This utility model, by setting primary, secondary, and fine grinding units sequentially distributed along the rotating spindle within the grinding chamber, constructs an integrated grinding process from coarse crushing to fine powder, eliminating the need for repeated grinding and effectively solving the problems of low grinding efficiency and high energy consumption in existing devices. Furthermore, the orderly configuration of the multi-stage grinding units enables precise control of material particle size in stages, achieving stable and continuous industrial production.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic manganese metal sheet processing technology, and in particular relates to a grinding device. Background Technology

[0002] With the booming development of the new energy vehicle sector, the market has placed increasingly stringent demands on the safety performance and energy density of power batteries. High-purity manganese tetroxide (referred to as "tetroxide") is a core precursor for mainstream cathode materials such as lithium iron manganese phosphate and lithium manganese oxide, and its quality directly affects battery performance. Currently, the industrial production of tetroxide mainly uses electrolytic manganese metal sheets as raw materials, which are then ground and pulverized before being produced through an oxidation reaction. Therefore, the level of technology and equipment in the manganese sheet pulverization process is crucial to the quality of subsequent tetroxide products.

[0003] However, in actual production, it is necessary to grind blocky electrolytic manganese sheets with a size of about 50mm into fine powder of 150-300μm. Existing grinding equipment often requires repeated grinding to achieve the target particle size, which not only has low grinding efficiency and high energy consumption, but also makes it difficult to achieve stable and continuous industrial production. Therefore, there is an urgent need for a device that can complete the entire processing from coarse crushing to fine powder in one go and achieve continuous production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide an electrolytic manganese sheet grinding device with high grinding efficiency, low energy consumption, continuous production capability, good heat dissipation, safety and reliability, and high product qualification rate.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows: An electrolytic manganese flake grinding device includes a grinding chamber and a multi-stage grinding assembly disposed in the grinding chamber for grinding materials sequentially from top to bottom. The multi-stage grinding assembly includes a rotating spindle and a primary grinding unit, an intermediate grinding unit, and a fine grinding unit arranged sequentially from top to bottom along the rotating spindle. The grinding gap of the primary grinding unit, the grinding gap of the intermediate grinding unit, and the grinding gap of the fine grinding unit decrease progressively.

[0006] In the aforementioned electrolytic manganese flake grinding device, preferably, the primary grinding unit includes a first fixed conical liner fixedly surrounding the inner wall of the grinding chamber, and a first movable conical disc disposed on the rotating main shaft and cooperating with the first fixed conical liner. The first movable conical disc is located below the first fixed conical liner. The intermediate grinding unit includes a second fixed conical liner fixedly surrounding the inner wall of the grinding chamber, and a second movable conical disc disposed on the rotating main shaft and cooperating with the second fixed conical liner. The second movable conical disc is located below the second fixed conical liner. Setting the grinding units in a conical surface configuration creates a uniform and stable grinding area. The location of the movable conical disc below the fixed conical liner optimizes the material flow path. Utilizing the material's own gravity and the centrifugal force generated by the rotation of the movable conical disc, grinding and conveying can be achieved simultaneously. After the material naturally enters the gap between the two grinding units from top to bottom, it flows orderly along the conical surface under the influence of the movable conical disc. This avoids material accumulation and blockage in the grinding area and ensures continuous connection between feeding, grinding, and discharging.

[0007] In the aforementioned electrolytic manganese flake grinding device, preferably, the fine grinding unit includes a bowl-shaped fixed grinding disc fixed to the bottom of the grinding chamber, and a conical grinding head located at the lower end of the rotating spindle and extending into the bowl-shaped fixed grinding disc. The discharge port of the grinding chamber is located at the center of the bottom of the bowl-shaped fixed grinding disc. The concave structure of the bowl-shaped fixed grinding disc restricts the disorderly diffusion of materials, prolongs the material grinding contact time, and allows the fine powder that has been ground to meet the standards to slide directly along the surface of the bowl-shaped fixed grinding disc to the central discharge port under the action of gravity, reducing the amount of material residue in the chamber, improving overall production efficiency, and reducing the difficulty of subsequent cleaning and maintenance. In addition, this arrangement does not occupy additional longitudinal space, making the overall structure more concise and compact.

[0008] Preferably, in the aforementioned electrolytic manganese flake grinding device, the device further includes a drive motor and a transmission spindle driven by the drive motor. The upper end of the rotating spindle is connected to the transmission spindle, and a buffer assembly is provided between them to prevent grinding jams. By setting the buffer assembly, faults such as motor overload protection shutdown and spindle deformation can be effectively avoided, significantly reducing production interruptions caused by jamming and improving production continuity.

[0009] In the aforementioned electrolytic manganese flake grinding device, preferably, the buffer assembly includes a transmission box and a buffer spring located inside the transmission box, one end of which is connected to the main transmission shaft. The rotating main shaft passes through the transmission box and is connected to the other end of the buffer spring. The transmission box also has a linear guide groove for guiding the rotating main shaft to move only along its axial direction. The buffer spring can directly absorb the instantaneous overload impact of the rotating main shaft. When large pieces of material appear in the grinding chamber or material accumulates instantaneously, the rotating main shaft will generate axial pressure or tension due to the sudden increase in load. At this time, the buffer spring, through compression or tension deformation and the limiting of the linear guide groove, allows the rotating main shaft to have a margin of movement for automatic vertical calibration along its axial direction, effectively preventing the grinding unit from jamming.

[0010] In the aforementioned electrolytic manganese flake grinding device, preferably, the transmission box is a sealed box filled with hydraulic oil, and a skeleton oil seal is provided at the connection between the transmission box and the rotating spindle to prevent hydraulic oil leakage. The sealed environment filled with hydraulic oil effectively isolates dust from the external grinding chamber from entering the transmission box, eliminating wear and jamming caused by dust particles. Furthermore, the hydraulic oil provides ample lubrication to all components, reducing mechanical wear and significantly improving the reliability and service life of the buffer assembly.

[0011] In the above-mentioned electrolytic manganese flake grinding device, preferably, the grinding chamber is filled with inert gas, and the electrolytic manganese flake grinding device further includes a ventilation component for placing the grinding material in an inert gas environment. The ventilation component includes a ventilation chamber for replacing the air carried by the grinding material with inert gas before the grinding material enters the grinding chamber. The ventilation chamber is located in front of the feed inlet of the grinding chamber. Because elemental manganese has high reactivity, the frictional and impact heat generated by mechanical forces during the grinding process easily accumulates inside the equipment. When manganese powder comes into full contact with air at high temperatures, it will quickly undergo an oxidation reaction to generate low-valence manganese oxides, directly affecting the quality pass rate of subsequent manganese products. By filling the equipment with inert gas to create an oxygen-free environment, it is possible to ensure that the material does not come into contact with air at high temperatures. Furthermore, since air is easily introduced when the material enters the grinding device, it can disrupt the inert environment and cause localized oxidation. By setting up an air exchange chamber, the air carried by the material can be replaced in advance, ensuring that the material entering the grinding chamber is already in an inert atmosphere. This avoids the problem of fine powder oxidation caused by initial air residue, improves the product pass rate, and effectively avoids the safety risk of high-temperature fire, thus enhancing the safety of the equipment.

[0012] In the aforementioned electrolytic manganese flake grinding device, preferably, a hopper is provided in front of the ventilation chamber, and the discharge port of the grinding chamber is connected to a silo filled with inert gas. The ventilation assembly further includes a first air shut-off valve located between the hopper and the ventilation chamber, a second air shut-off valve located between the ventilation chamber and the feed inlet, and an air shut-off discharge valve located between the discharge port and the silo. With this configuration, when the hopper feeds material, the first air shut-off valve is first opened to allow the material to enter the ventilation chamber. At this time, the second air shut-off valve remains closed to prevent direct communication between the ventilation chamber and the inert gas environment of the grinding chamber. After the ventilation chamber is filled with inert gas and all air is expelled, the first air shut-off valve is closed and the second air shut-off valve is opened to send the material in the inert environment into the grinding chamber. Furthermore, because the silo is filled with inert gas, the material is always in an oxygen-free environment, preventing oxidation during the grinding process and after discharge.

[0013] Preferably, in the above-mentioned electrolytic manganese flake grinding device, the electrolytic manganese flake grinding device further includes a cooling component disposed on the outer periphery of the grinding chamber for cooling the material. By setting the cooling component to cool the outer periphery of the grinding chamber, heat can be removed from the chamber in real time, and the temperature of the device can be stably controlled in the low temperature range. Combined with the inert environment, this forms a double protection against oxidation, improving the qualification rate of manganese powder while ensuring safe production.

[0014] In the aforementioned electrolytic manganese flake grinding apparatus, preferably, the cooling assembly includes a cooling jacket surrounding the outer wall of the grinding chamber and a discharge cooling coil located at the discharge port of the grinding chamber. Cooling medium flows inside both the cooling jacket and the discharge cooling coil. The cooling jacket, through its large-area contact with the chamber, provides uniform cooling to the entire grinding area via the cooling medium, preventing localized high temperatures within the chamber and ensuring the material remains at a low temperature throughout the grinding process. Furthermore, by placing the discharge cooling coil at the discharge port, the material temperature can be further reduced, ensuring that the material entering the silo is cooled to room temperature.

[0015] Compared with the prior art, the advantages of this utility model are: This invention constructs an integrated grinding process from coarse crushing to fine powder by setting primary, intermediate, and fine grinding units arranged sequentially from top to bottom along the rotating main axis in the grinding chamber. This eliminates the need for repeated grinding, effectively solving the problems of low grinding efficiency and high energy consumption in existing devices. Furthermore, the orderly configuration of the multi-stage grinding units enables precise control of material particle size, achieving stable and continuous industrial production and significantly improving the practicality and economy of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the electrolytic manganese flake grinding device in an embodiment. Figure 2 This is a schematic diagram of the structure of the multi-stage grinding assembly in an embodiment; Figure 3 This is a schematic diagram of the buffer component in its normal state according to an embodiment; Figure 4 This is a schematic diagram of the ultimate stretching state of the buffer component in an embodiment.

[0018] Legend 1. Grinding chamber; 11. Feed inlet; 12. Discharge outlet; 2. Multi-stage grinding assembly; 21. Rotary spindle; 22. Primary grinding unit; 221. First fixed cone liner; 222. First moving cone disc; 23. Intermediate grinding unit; 231. Second fixed cone liner; 232. Second moving cone disc; 24. Fine grinding unit; 241. Bowl-shaped fixed grinding disc; 242. Conical grinding head; 3. Drive motor; 31. Transmission spindle; 4. Buffer assembly; 41. Transmission box; 42. Buffer spring; 43. Linear guide groove; 44. Frame oil seal; 5. Ventilation assembly; 51. Ventilation chamber; 52. First air shut-off valve; 53. Second air shut-off valve; 54. Air shut-off unloading valve; 6. Hopper; 7. Storage bin; 8. Cooling assembly; 81. Cooling jacket; 82. Discharge cooling coil; 9. Reduction mechanism; 10. Shaft stabilization mechanism. Detailed Implementation

[0019] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0020] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0021] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0022] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0023] Example: like Figures 1 to 4 As shown, the electrolytic manganese flake grinding device of this embodiment includes a grinding chamber 1 and a multi-stage grinding assembly 2 disposed in the grinding chamber 1 for grinding materials sequentially from top to bottom. The multi-stage grinding assembly 2 includes a rotating spindle 21 and a primary grinding unit 22, an intermediate grinding unit 23, and a fine grinding unit 24 arranged sequentially from top to bottom along the rotating spindle 21. The grinding gap of the primary grinding unit 22, the grinding gap of the intermediate grinding unit 23, and the grinding gap of the fine grinding unit 24 decrease step by step.

[0024] In this embodiment, as Figure 2 As shown, the primary grinding unit 22 includes a first fixed conical liner 221 fixedly surrounding the inner wall of the grinding cavity 1, and a first movable conical disk 222 disposed on the rotating spindle 21 and cooperating with the first fixed conical liner 221. The first movable conical disk 222 is disposed on the lower side of the first fixed conical liner 221. The intermediate grinding unit 23 includes a second fixed conical liner 231 fixedly surrounding the inner wall of the grinding cavity 1, and a second movable conical disk 232 disposed on the rotating spindle 21 and cooperating with the second fixed conical liner 231. The second movable conical disk 232 is disposed on the lower side of the second fixed conical liner 231.

[0025] In this embodiment, the fine grinding unit 24 includes a bowl-shaped fixed grinding disc 241 fixed at the bottom of the grinding chamber 1, and a conical grinding head 242 located at the lower end of the rotating spindle 21 and extending into the bowl-shaped fixed grinding disc 241. The discharge port 12 of the grinding chamber 1 is located at the bottom center of the bowl-shaped fixed grinding disc 241.

[0026] In this embodiment, the grinding gap of the primary grinding unit 22 is set in the range of 5-50mm, the grinding gap of the intermediate grinding unit 23 is set in the range of 1-10mm, and the grinding gap of the fine grinding unit 24 is set in the range of 0.3-2mm. All three are made of high-hardness materials such as silicon carbide, zirconium oxide, or tungsten carbide to prevent impurity contamination. The fixed cone liner and the moving cone disk have textured surfaces to increase the friction between the material and the grinding surface, enhance the shearing and extrusion effect, and improve the grinding efficiency.

[0027] In this embodiment, the electrolytic manganese flake grinding device also includes a drive motor 3 and a transmission spindle 31 driven by it. The upper end of the rotating spindle 21 is connected to the transmission spindle 31, and a buffer component 4 is provided between them to prevent grinding jamming.

[0028] In this embodiment, as Figure 3 and Figure 4 As shown, the buffer assembly 4 includes a transmission box 41 and a buffer spring 42 located inside the transmission box 41 with one end connected to the transmission main shaft 31. The rotating main shaft 21 passes through the transmission box 41 and is connected to the other end of the buffer spring 42. The transmission box 41 is also provided with a linear guide groove 43 for guiding the rotating main shaft 21 to move only along its axial direction.

[0029] In this embodiment, the transmission box 41 is a sealed box filled with hydraulic oil. A skeleton oil seal 44 is provided at the connection between the transmission box 41 and the rotating spindle 21 to prevent hydraulic oil leakage.

[0030] In this embodiment, the grinding chamber 1 is filled with inert gas, and the electrolytic manganese sheet grinding device also includes a ventilation component 5 for placing the grinding material in an inert gas environment. The ventilation component 5 includes a ventilation chamber 51 for replacing the air carried by the grinding material with inert gas before the grinding material enters the grinding chamber 1. The ventilation chamber 51 is located in front of the feed inlet 11 of the grinding chamber 1.

[0031] In this embodiment, the inert gas used is nitrogen. In other embodiments, other inert gases such as argon can be used, depending on the actual situation.

[0032] In this embodiment, a hopper 6 is provided in front of the ventilation chamber 51, and the discharge port 12 of the grinding chamber 1 is connected to a silo 7 filled with inert gas. The ventilation assembly 5 also includes a first air shut-off valve 52 located between the hopper 6 and the ventilation chamber 51, a second air shut-off valve 53 located between the ventilation chamber 51 and the feed inlet 11, and an air shut-off unloading valve 54 located between the discharge port 12 and the silo 7.

[0033] In this embodiment, the electrolytic manganese sheet grinding device also includes a cooling component 8 disposed on the outer periphery of the grinding chamber 1 for cooling the material.

[0034] In this embodiment, the cooling assembly 8 includes a cooling jacket 81 surrounding the outer wall of the grinding chamber 1 and a discharge cooling coil 82 located at the discharge port 12 of the grinding chamber 1. Cooling liquid flows inside the cooling jacket 81 and the discharge cooling coil 82.

[0035] In this embodiment, the electrolytic manganese flake grinding device also includes a reduction mechanism 9 connected to the drive motor 3 and a shaft stabilizing mechanism 10. The reduction mechanism 9 can convert the high-speed output of the drive motor 3 into a speed and torque that are adapted to the rotating spindle 21. The shaft stabilizing mechanism 10 can effectively prevent the rotating spindle 21 from deviating and ensure that the gap of the grinding unit is always uniform and stable.

[0036] In this embodiment, the specific operating steps include: first, filling the grinding chamber 1 with inert gas; then, adding electrolytic manganese flakes to the hopper 6, followed by opening the first air shut-off valve 52 (at this time, the second air shut-off valve 53 remains closed to prevent outside air from entering the grinding chamber); after an appropriate amount of electrolytic manganese flakes fall into the ventilation chamber 51, closing the first air shut-off valve 52; then filling the ventilation chamber 51 with inert gas to expel the internal air; and finally opening the second air shut-off valve 53 to allow the electrolytic manganese flakes in the ventilation chamber 51 to fall into the grinding chamber 1. Driven by the drive motor 3, the rotating spindle 21 synchronously drives the first moving cone disk 222, the second moving cone disk 232, and the conical grinding head 242 to rotate. The material first slides naturally down the slope of the first fixed cone liner 221 to the gap between it and the first moving cone disk 222. It is initially ground and crushed by the combined action of grinding pressure and centrifugal force and then transferred to the second fixed cone liner 231. It then slides down the slope of the second fixed cone liner 231 to the gap between it and the second moving cone disk 232 for further grinding. When the material slides down to the bowl-shaped fixed grinding disk 241, the fineness has been reduced to below 2mm. After being rotated and ground by the conical grinding head 242, the final fineness of the electrolytic manganese powder reaches 0.15-0.3mm. Then, the fine powder is cooled by the discharge port 12 equipped with a feeding cooling coil 82 and then conveyed downward. Finally, the discharge is controlled by the air-closing discharge valve 54 and falls into the silo 7 pre-filled with inert gas, completing the entire grinding and storage process.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electrolytic manganese flake grinding device, comprising a grinding chamber (1) and a multi-stage grinding assembly (2) disposed within the grinding chamber (1) for grinding materials sequentially from top to bottom, characterized in that, The multi-stage grinding assembly (2) includes a rotating spindle (21), and a primary grinding unit (22), an intermediate grinding unit (23), and a fine grinding unit (24) arranged sequentially from top to bottom along the rotating spindle (21). The grinding gap of the primary grinding unit (22), the grinding gap of the intermediate grinding unit (23), and the grinding gap of the fine grinding unit (24) decrease step by step.

2. The electrolytic manganese flake grinding apparatus according to claim 1, characterized in that, The primary grinding unit (22) includes a first fixed conical liner (221) fixedly surrounding the inner wall of the grinding cavity (1), and a first movable conical disk (222) disposed on the rotating spindle (21) and cooperating with the first fixed conical liner (221). The first movable conical disk (222) is disposed on the lower side of the first fixed conical liner (221). The intermediate grinding unit (23) includes a second fixed conical liner (231) fixedly surrounding the inner wall of the grinding cavity (1), and a second movable conical disk (232) disposed on the rotating spindle (21) and cooperating with the second fixed conical liner (231). The second movable conical disk (232) is disposed on the lower side of the second fixed conical liner (231).

3. The electrolytic manganese flake grinding apparatus according to claim 1, characterized in that, The fine grinding unit (24) includes a bowl-shaped fixed grinding disc (241) fixed at the bottom of the grinding cavity (1) and a conical grinding head (242) located at the lower end of the rotating spindle (21) and extending into the bowl-shaped fixed grinding disc (241). The discharge port (12) of the grinding cavity (1) is located at the bottom center of the bowl-shaped fixed grinding disc (241).

4. The electrolytic manganese flake grinding apparatus according to claim 1, characterized in that, The electrolytic manganese flake grinding device also includes a drive motor (3) and a transmission spindle (31) driven by it. The upper end of the rotating spindle (21) is connected to the transmission spindle (31), and a buffer assembly (4) is provided between them to prevent grinding jamming.

5. The electrolytic manganese flake grinding apparatus according to claim 4, characterized in that, The buffer assembly (4) includes a transmission box (41) and a buffer spring (42) located inside the transmission box (41) and connected at one end to the transmission spindle (31). The rotating spindle (21) passes through the transmission box (41) and is connected to the other end of the buffer spring (42). The transmission box (41) is also provided with a linear guide groove (43) for guiding the rotating spindle (21) to move only along its axial direction.

6. The electrolytic manganese flake grinding apparatus according to claim 5, characterized in that, The transmission box (41) is a sealed box filled with hydraulic oil. A skeleton oil seal (44) is provided at the connection between the transmission box (41) and the rotating spindle (21) to prevent hydraulic oil leakage.

7. The electrolytic manganese flake grinding apparatus according to any one of claims 1-6, characterized in that, The grinding chamber (1) is filled with inert gas. The electrolytic manganese sheet grinding device also includes an air exchange component (5) for placing the grinding material in an inert gas environment. The air exchange component (5) includes an air exchange chamber (51) for replacing the air carried by the grinding material with inert gas before the grinding material enters the grinding chamber (1). The air exchange chamber (51) is located in front of the feed inlet (11) of the grinding chamber (1).

8. The electrolytic manganese flake grinding apparatus according to claim 7, characterized in that, A hopper (6) is provided in front of the ventilation chamber (51). The outlet (12) of the grinding chamber (1) is connected to a silo (7) filled with inert gas. The ventilation assembly (5) also includes a first air shut-off valve (52) between the hopper (6) and the ventilation chamber (51), a second air shut-off valve (53) between the ventilation chamber (51) and the feed inlet (11), and an air shut-off unloading valve (54) between the discharge outlet (12) and the silo (7).

9. The electrolytic manganese flake grinding apparatus according to any one of claims 1-6, characterized in that, The electrolytic manganese flake grinding device also includes a cooling component (8) located on the outer periphery of the grinding chamber (1) for cooling the material.

10. The electrolytic manganese flake grinding apparatus according to claim 9, characterized in that, The cooling assembly (8) includes a cooling jacket (81) surrounding the outer wall of the grinding chamber (1) and a discharge cooling coil (82) located at the discharge port (12) of the grinding chamber (1). Cooling medium flows inside the cooling jacket (81) and the discharge cooling coil (82).

Images