A high-energy dry powder milling method

Abstract

This invention discloses a high-energy dry powder ball milling method, including a ball milling jar and a vibration device. Adjusting the amplitude and vibration mode of the vibration device makes the material in the jar more uniformly mixed, resulting in a more uniform electric field distribution. The material is more easily crushed by the electric field, improving processing efficiency and reducing electrode operating voltage. Gradually replacing electrodes with larger diameter electrodes can reduce the discharge spacing while keeping the ball milling jar specifications unchanged. At the same time, it increases the electrode discharge area, improves electric field uniformity and discharge efficiency, and can also effectively reduce the current density per unit area on the electrode surface, thereby extending the electrode service life.

Description

Technical Field

[0001] This invention relates to the field of high-energy ball milling, and more particularly to a high-energy dry powder ball milling method. Background Technology

[0002] Ball milling is a process that uses the impact of grinding media and the grinding action between the grinding media and the inner wall of the ball mill to crush and mix materials. When the ball mill reactor rotates, the friction between the grinding media and the inner wall of the ball mill carries the grinding media up in the direction of rotation and then back down. Under the action of impact and shear forces, the material is continuously crushed.

[0003] High-energy ball milling utilizes the high-speed rotation or vibration of a ball mill to intensely impact, grind, and stir raw materials with hard balls, pulverizing powder into nano-sized particles. One type of high-energy ball milling equipment utilizes electrode discharge and conductive grinding balls to create an electric field within the mill tank. This electric field breaks down the powder, allowing it to be pulverized in conjunction with the ball mill.

[0004] Existing high-energy ball milling equipment has the following shortcomings during use: the electrodes operate in a long-term discharge state and the operating voltage is high, which easily leads to concentrated discharge on the electrodes, resulting in rapid wear and short service life. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of current high-energy ball milling devices, the present invention provides a high-energy dry powder ball milling method, which can extend the service life of electrodes.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0007] A high-energy dry powder ball milling method includes the following steps:

[0008] Step S1: Set up a ball milling device, including a ball milling jar and a vibration device; an electrode rod is installed inside the ball milling jar, and the inner wall of the ball milling jar and the electrode rod are respectively connected to a high-voltage power supply; the vibration device includes an adjustable vibration motor; a counterweight is installed at the end of the output shaft of the adjustable vibration motor; place the conductive grinding balls and the material to be processed into the ball milling jar;

[0009] Step S2: Adjust the amplitude and vibration mode of the vibration device until the material and conductive grinding balls are mixed evenly to meet the process requirements;

[0010] Step S3: Change the voltage applied between the inner wall of the ball mill jar and the electrode rod, and select the lowest voltage value that meets the process requirements;

[0011] Step S4: Gradually shorten the distance between the inner wall of the ball mill jar and the electrode rod, and select the distance value that maximizes the net output and economic benefits of the ball milling device;

[0012] Step S5: Repeat step S3.

[0013] According to one aspect of the invention, the vertical distance between the electrode rod and the inner wall of the grinding jar is uniform everywhere.

[0014] According to one aspect of the present invention, the amplitude of the vibration adjustment device is specifically adjusted by adjusting the speed and counterweight of the adjustable vibration motor.

[0015] According to one aspect of the invention, adjusting the vibration mode specifically involves adjusting the amplitude ratio of the vibration initiation device in each direction.

[0016] According to one aspect of the invention, shortening the distance between the inner wall of the grinding jar and the electrode rod specifically involves replacing the electrode with a larger diameter electrode while keeping the specifications of the grinding jar unchanged.

[0017] According to one aspect of the present invention, the grinding jar includes a grinding jar body, an electrode rod, and a valve assembly; the grinding jar body includes a grinding jar sidewall, a first cover plate, and a second cover plate; the two ends of the grinding jar sidewall are respectively fixedly connected to the first cover plate and the second cover plate; the electrode rod is disposed in the grinding jar body, and its two ends are respectively connected to the first cover plate and the second cover plate; the electrode rod includes a wear-resistant insulating layer and a blank from the outside to the inside; the blank is hollow to form a cavity; the valve assembly is disposed on the grinding jar body and communicates with the inside of the grinding jar body; the vibration device includes a mounting platform, a vibration base, and an adjustable vibration motor; the adjustable vibration motor is fixedly connected to the mounting platform; the adjustable vibration motor includes a swing arm, and a counterweight is disposed on the swing arm; the grinding jar body is fixed on the mounting platform.

[0018] According to one aspect of the present invention, the electrode rod is cylindrical; the cavity is a cylindrical cavity.

[0019] According to one aspect of the invention, the mounting platform and the vibration base are connected by a plurality of elastic components, the elastic components including a plurality of parallel balance springs.

[0020] According to one aspect of the invention, the rotation axis of the swing arm is perpendicular to the mounting platform.

[0021] According to one aspect of the present invention, the adjustable vibration motor is a dual-output shaft motor, with swing arms provided at both ends of its output shaft.

[0022] Advantages of implementing this invention:

[0023] The electrode rod blank is hollow inside and covered with a wear-resistant insulating layer on the outside, which increases the discharge area and reduces the distance between the electrode and the discharge area on the inner wall of the ball mill jar. This reduces the working voltage, thereby effectively reducing electrode loss caused by concentrated discharge and wear of the high-voltage electrode and extending the service life of the electrode rod. By adjusting the number of counterweights and the installation angle on the swing arm, the amplitude and vibration mode of the equipment can be adjusted to suit the vibration conditions of the equipment. This allows for more uniform mixing and more complete reaction of materials in the ball mill jar, effectively improving the working efficiency of the high-energy ball mill equipment and further reducing the working voltage of the electrode. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a ball milling device according to the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a ball milling device according to the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the structure of a ball milling device according to the present invention. Figure 3 ;

[0028] Figure 4 Schematic diagrams of two scenarios for adjusting the counterweight angle.

[0029] Illustrations: 1. Grinding jar body; 11. Grinding jar side wall; 12. First cover plate; 13. Second cover plate; 14. Fixing bracket; 2. Electrode rod; 21. Preform; 22. Wear-resistant insulating layer; 31. Feed valve; 32. Discharge valve; 33. Vacuum valve; 4. Mounting platform; 41. Connecting plate; 42. Structural component; 5. Vibration base; 6. Adjustable vibration motor; 61. Swing arm; 7. Elastic component; 8. Wire. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a high-energy dry powder ball milling method includes the following steps:

[0033] Step S1: Set up a ball milling device, including a ball milling jar and a vibration device; an electrode rod is installed inside the ball milling jar, and the inner wall of the ball milling jar and the electrode rod are respectively connected to a high-voltage power supply; the vibration device includes an adjustable vibration motor; a counterweight is installed at the end of the output shaft of the adjustable vibration motor; place the conductive grinding balls and the material to be processed into the ball milling jar;

[0034] Step S2: Adjust the amplitude and vibration mode of the vibration device until the material and conductive grinding balls are mixed evenly to meet the process requirements;

[0035] Step S3: Change the voltage applied between the inner wall of the ball mill jar and the electrode rod, and select the lowest voltage value that allows the particle size of the processed material to meet the process requirements;

[0036] Step S4: Gradually shorten the distance between the inner wall of the ball mill jar and the electrode rod, and select the distance value that maximizes the net output and economic benefits of the ball milling device;

[0037] Step S5: Repeat step S3, and adjust the working voltage of the electrode rod to the lowest value that meets the process requirements.

[0038] In practical applications, the vertical distance between the electrode rod and the inner wall of the ball mill jar should be uniform everywhere to ensure uniform discharge on the electrode surface, which is conducive to forming a uniform electric field, and with the uniformly mixed material, improves the processing efficiency of high-energy ball milling.

[0039] In step S2, adjusting the amplitude of the vibration device specifically involves adjusting the speed and counterweight of the adjustable vibration motor. The higher the speed of the adjustable vibration motor or the greater the counterweight, the greater the overall amplitude of the ball mill. The amplitude and vibration mode required for uniform mixing of materials of different particle sizes and conductive grinding balls may vary, so targeted adjustments are necessary.

[0040] Adjusting the vibration mode specifically involves adjusting the amplitude ratio of the vibration device in each direction, which is related to the specific mechanical structure of the vibration device.

[0041] In step S3, the voltage between the inner wall of the ball mill jar and the electrode rod is adjusted. Depending on the situation, the voltage can be adjusted gradually from high to low or from low to high. The lowest voltage that can meet the process requirements can be found through multiple experiments and comparisons.

[0042] In step S4, during actual debugging, a more reasonable approach is to replace the electrode rod with one of a larger diameter while keeping the ball mill jar specifications unchanged. This would shorten the distance between the inner wall of the ball mill jar and the electrode rod (essentially reducing the discharge spacing of the electrodes). Theoretically, the larger the electrode rod, the smaller the discharge spacing. With a fixed power, the discharge area is larger, and the current density per unit area is lower, which is beneficial for energy saving and protecting the electrode rod. However, if the ball mill jar specifications remain unchanged, increasing the electrode rod size will also reduce the effective volume of the ball mill jar, resulting in a decrease in the processing output per batch. Therefore, in actual production, the optimal electrode size is determined by comparing multiple experiments and selecting the electrode rod size with the highest net output economic benefits (i.e., selecting the electrode rod size that achieves the best balance between output, efficiency, energy consumption, equipment wear, and other factors).

[0043] In existing high-energy ball milling devices that utilize electric fields, the lifespan of the electrodes is relatively short, mainly because the discharge spacing between the electrodes is large and the operating voltage is high. This easily leads to concentrated discharge, which accelerates electrode wear (the pulse discharge formed between the electrode and the material generates instantaneous heat, high temperature, and high pressure, causing oxidation, ablation, melting, and other losses to the electrode material; electrode wear is directly related to the discharge intensity and the number of discharges. The greater the discharge intensity, the greater the electrode wear; the more discharges, the more obvious the electrode wear; reducing the discharge spacing can reduce the discharge intensity and the electrode operating voltage).

[0044] Adjusting the amplitude and vibration mode of the vibration device to ensure uniform mixing within the ball mill jar can result in a more uniform electric field distribution, easier powder breakdown, a more complete reaction, and a lower discharge voltage. Shortening the distance between the electrodes and the inner wall of the ball mill jar shortens the discharge spacing, improves the uniformity of the electric field, and also reduces the operating voltage.

[0045] In this embodiment, the grinding jar is fixed on the vibration device. The grinding jar includes a grinding jar body 1, an electrode rod 2, and a valve assembly. The grinding jar body 1 includes a grinding jar side wall 11, a first cover plate 12, and a second cover plate 13. The two ends of the grinding jar side wall 11 are respectively fixed to the first cover plate 12 and the second cover plate 13. The electrode rod 2 is disposed in the grinding jar body 1, and its two ends are respectively connected to the first cover plate 12 and the second cover plate 13. The electrode rod 2 includes a wear-resistant insulating layer 22 and a blank 21 from the outside to the inside. The blank 21 is hollow to form a cavity. The valve assembly is disposed on the grinding jar body 1 and communicates with the inside of the grinding jar body 1.

[0046] The vibration device includes a mounting platform 4, a vibration base 5, an adjustable vibration motor 6, and elastic components 7; the mounting platform 4 and the vibration base 5 are connected by several elastic components 7; the adjustable vibration motor 6 is fixedly connected to the mounting platform 4; the ball mill jar body 1 is fixed on the mounting platform 4.

[0047] In this embodiment, the elastic component 7 is composed of several parallel balance springs. In practical applications, the overall performance parameters of the elastic component 7 can be adjusted by adjusting the number of balance springs or by replacing balance springs of different specifications, thereby adjusting the working state of the ball mill equipment.

[0048] An adjustable vibration motor 6 has a swing arm 61 on its output shaft. The motor drives the swing arm 61 to rotate, causing vibration. The rotation axis of the swing arm 61 is perpendicular to the mounting platform 4. The adjustable vibration motor 6 is a dual-output shaft motor, with swing arms 61 on both ends of its output shaft. In practical applications, the installation angle of the swing arm 61 is adjustable. Under normal conditions, the swing arm 61 is perpendicular to the output shaft of the adjustable vibration motor 6. A detachable counterweight is also provided on the swing arm 61.

[0049] In addition to directly adjusting the output power and motion mode of the adjustable vibration motor 6, the amplitude of the platform can also be adjusted by increasing or decreasing the counterweight. The counterweight is eccentric fan-shaped, and the vibration mode of the platform can be adjusted by adjusting the angle of the counterweight at both ends of the motor (adjusting the ratio of circumferential amplitude and vertical amplitude).

[0050] In practical applications, when both counterweights are eccentrically fan-shaped and distributed at a 0-degree angle around the motor shaft, the vertical amplitude is minimal, and the circumferential amplitude is maximum (e.g., ...). Figure 4 (As shown by label a); when the counterweights at both ends are distributed at 180-degree angles around the motor shaft, the vertical amplitude is the largest and the circumferential amplitude is the smallest (as shown by label a). Figure 4 (As shown by label b); the more counterweights there are, the greater the overall amplitude, and vice versa.

[0051] Multiple methods are combined to adjust the whole machine to a suitable vibration condition, so that the material (powder and conductive grinding balls) in the ball mill can be mixed more evenly when the equipment is working, so that the electric field distribution is more uniform and it is easier to break down the powder, thereby reducing the discharge voltage and making the reaction more complete. Compared with traditional high-energy ball mills, it can effectively improve working efficiency.

[0052] The mounting platform 4 includes a connecting plate 41 and a structural component 42; the connecting plate 41 is used to mount the ball mill jar; the structural component 42 has an inverted "V" shaped cross section, including a groove and a mounting member located at the edge of the groove.

[0053] The adjustable vibration motor 6 is set in the groove, leaving enough space for the installation of the ball mill jar body; the mounting components located at the edge are responsible for fixed connection with the elastic components 7; in this way, the adjustable vibration motor 6 is located in the center of the vibration device, and the elastic components 7 are distributed at the edge. When the motor is working, the ball mill jar body 1 can vibrate stably with the mounting platform 4.

[0054] The valve assembly is installed on the first cover plate 12 or the second cover plate 13, including a feed valve 31, a discharge valve 32 and a vacuum valve 33; wherein the feed valve 31 and the discharge valve 32 are located at the two ends of the side wall 11 of the ball mill jar, and the position of the feed valve 31 is higher than that of the discharge valve 32; the vacuum valve 33 is located on the opposite side of the feed valve 31.

[0055] The ball mill jar body 1 is fixedly connected to the connecting plate 41 by a fixed bracket 14; the fixed bracket 14 is electrically connected to the ball mill jar body 1; the fixed bracket 14 is connected to a high-voltage power supply through a wire 8; one end of the electrode rod 2 blank 21 is connected to the high-voltage power supply through a wire 8; thus, when energized, an electric field will be formed between the outer surface of the electrode rod 2 and the inner wall of the ball mill jar.

[0056] Preferably, in this embodiment, the cavity inside the electrode rod 2 blank 21 is cylindrical, which is easy to process and has better consistency. The wear-resistant insulating layer is attached to the surface of the blank by hot melting. The hollow structure not only increases the diameter of the electrode rod, but also improves the structural strength of the electrode rod.

[0057] Since the blank 21 of electrode rod 2 is hollow, the discharge area of ​​the electrode can be increased without significantly increasing the installation weight of electrode rod 2 (the mass of the ball mill jar remains basically unchanged), the distance between electrode rod 2 and the discharge area on the inner wall of the ball mill jar is reduced, the uniformity of the electric field is improved, the discharge efficiency is increased, the discharge density is increased, and the increase in surface area can also effectively reduce the current density per unit area on the electrode surface and extend the service life of the electrode.

[0058] Example 2

[0059] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a high-energy dry powder ball milling method includes the following steps:

[0060] Step S1: Set up a ball milling device, including a ball milling jar and a vibration device; an electrode rod is installed inside the ball milling jar, and the inner wall of the ball milling jar and the electrode rod are respectively connected to a high-voltage power supply; the vibration device includes an adjustable vibration motor; a counterweight is installed at the end of the output shaft of the adjustable vibration motor; place the conductive grinding balls and the material to be processed into the ball milling jar;

[0061] Step S2: Adjust the amplitude and vibration mode of the vibration device until the material and conductive grinding balls are mixed evenly to meet the process requirements;

[0062] Step S3: Change the voltage applied between the inner wall of the ball mill jar and the electrode rod, and select the lowest voltage value that allows the particle size of the processed material to meet the process requirements;

[0063] Step S4: Gradually shorten the distance between the inner wall of the ball mill jar and the electrode rod, and select the distance value that maximizes the net output and economic benefits of the ball milling device;

[0064] Step S5: Repeat step S3, and adjust the working voltage of the electrode rod to the lowest value that meets the process requirements.

[0065] In practical applications, the vertical distance between the electrode rod and the inner wall of the ball mill jar should be uniform everywhere to ensure uniform discharge on the electrode surface, which is conducive to forming a uniform electric field, and with the uniformly mixed material, improves the processing efficiency of high-energy ball milling.

[0066] In step S2, adjusting the amplitude of the vibration device specifically involves adjusting the speed and counterweight of the adjustable vibration motor. The higher the speed of the adjustable vibration motor or the greater the counterweight, the greater the overall amplitude of the ball mill. The amplitude and vibration mode required for uniform mixing of materials of different particle sizes and conductive grinding balls may vary, so targeted adjustments are necessary.

[0067] Adjusting the vibration mode specifically involves adjusting the amplitude ratio of the vibration device in each direction, which is related to the specific mechanical structure of the vibration device.

[0068] In step S3, the voltage between the inner wall of the ball mill jar and the electrode rod is adjusted. Depending on the situation, the voltage can be adjusted gradually from high to low or from low to high. The lowest voltage that can meet the process requirements can be found through multiple experiments and comparisons.

[0069] In step S4, during actual debugging, a more reasonable approach is to replace the electrode rod with one of a larger diameter while keeping the ball mill jar specifications unchanged. This would shorten the distance between the inner wall of the ball mill jar and the electrode rod (essentially reducing the discharge spacing of the electrodes). Theoretically, the larger the electrode rod, the smaller the discharge spacing. With a fixed power, the discharge area is larger, and the current density per unit area is lower, which is beneficial for energy saving and protecting the electrode rod. However, if the ball mill jar specifications remain unchanged, increasing the electrode rod size will also reduce the effective volume of the ball mill jar, resulting in a decrease in the processing output per batch. Therefore, in actual production, the optimal electrode size is determined by comparing multiple experiments and selecting the electrode rod size with the highest net output economic benefits (i.e., selecting the electrode rod size that achieves the best balance between output, efficiency, energy consumption, equipment wear, and other factors).

[0070] In existing high-energy ball milling devices that utilize electric fields, the lifespan of the electrodes is relatively short, mainly because the discharge spacing between the electrodes is large and the operating voltage is high. This easily leads to concentrated discharge, which accelerates electrode wear (the pulse discharge formed between the electrode and the material generates instantaneous heat, high temperature, and high pressure, causing oxidation, ablation, melting, and other losses to the electrode material; electrode wear is directly related to the discharge intensity and the number of discharges. The greater the discharge intensity, the greater the electrode wear; the more discharges, the more obvious the electrode wear; reducing the discharge spacing can reduce the discharge intensity and the electrode operating voltage).

[0071] Adjusting the amplitude and vibration mode of the vibration device to ensure uniform mixing within the ball mill jar can result in a more uniform electric field distribution, easier powder breakdown, a more complete reaction, and a lower discharge voltage. Shortening the distance between the electrodes and the inner wall of the ball mill jar shortens the discharge spacing, improves the uniformity of the electric field, and also reduces the operating voltage.

[0072] Furthermore, the working voltage of the electrode rod is also related to the gas pressure inside the ball mill jar (the lower the gas pressure inside the jar, the lower the required discharge voltage, that is, the easier it is to cause a discharge phenomenon, and vice versa). The gas pressure inside the jar can be adjusted to further reduce the working voltage of the electrode rod while meeting the process requirements.

[0073] In this embodiment, the grinding jar is fixed on the vibration device. The grinding jar includes a grinding jar body 1, an electrode rod 2, and a valve assembly. The grinding jar body 1 includes a grinding jar side wall 11, a first cover plate 12, and a second cover plate 13. The two ends of the grinding jar side wall 11 are respectively fixed to the first cover plate 12 and the second cover plate 13. The electrode rod 2 is disposed in the grinding jar body 1, and its two ends are respectively connected to the first cover plate 12 and the second cover plate 13. The electrode rod 2 includes a wear-resistant insulating layer 22 and a blank 21 from the outside to the inside. The blank 21 is hollow to form a cavity. The valve assembly is disposed on the grinding jar body 1 and communicates with the inside of the grinding jar body 1.

[0074] The vibration device includes a mounting platform 4, a vibration base 5, an adjustable vibration motor 6, and elastic components 7; the mounting platform 4 and the vibration base 5 are connected by several elastic components 7; the adjustable vibration motor 6 is fixedly connected to the mounting platform 4; the ball mill jar body 1 is fixed on the mounting platform 4.

[0075] In this embodiment, the elastic component 7 is composed of several parallel balance springs. In practical applications, the overall performance parameters of the elastic component 7 can be adjusted by adjusting the number of balance springs or by replacing balance springs of different specifications, thereby adjusting the working state of the ball mill equipment.

[0076] An adjustable vibration motor 6 has a swing arm 61 on its output shaft. The motor drives the swing arm 61 to rotate, causing vibration. The rotation axis of the swing arm 61 is perpendicular to the mounting platform 4. The adjustable vibration motor 6 is a dual-output shaft motor, with swing arms 61 on both ends of its output shaft. In practical applications, the installation angle of the swing arm 61 is adjustable. Under normal conditions, the swing arm 61 is perpendicular to the output shaft of the adjustable vibration motor 6. A detachable counterweight is also provided on the swing arm 61.

[0077] In addition to directly adjusting the output power and motion mode of the adjustable vibration motor 6, the amplitude of the platform can also be adjusted by increasing or decreasing the counterweight. The counterweight is eccentric fan-shaped, and the vibration mode of the platform can be adjusted by adjusting the angle of the counterweight at both ends of the motor (adjusting the ratio of circumferential amplitude and vertical amplitude).

[0078] In practical applications, when both counterweights are eccentrically fan-shaped and distributed at a 0-degree angle around the motor shaft, the vertical amplitude is minimal, and the circumferential amplitude is maximum (e.g., ...). Figure 4 (As shown by label a); when the counterweights at both ends are distributed at 180-degree angles around the motor shaft, the vertical amplitude is the largest and the circumferential amplitude is the smallest (as shown by label a). Figure 4 (As shown by label b); the more counterweights there are, the greater the overall amplitude, and vice versa.

[0079] Multiple methods are combined to adjust the whole machine to a suitable vibration condition, so that the material (powder and conductive grinding balls) in the ball mill can be mixed more evenly when the equipment is working, so that the electric field distribution is more uniform and it is easier to break down the powder, thereby reducing the discharge voltage and making the reaction more complete. Compared with traditional high-energy ball mills, it can effectively improve working efficiency.

[0080] During actual debugging, the end cover of the ball mill can be temporarily replaced with a transparent observation window. Whether the material and the conductive grinding balls are mixed evenly can be observed directly by visual inspection of the mixing state of the material, or indirectly by observing the uniformity of the discharge distribution range of the electrode rod. The more uniform the discharge of the electrode rod, the more uniform the mixing of the material and the conductive grinding balls.

[0081] Similarly, when adjusting the working voltage of the electrode rod, in addition to directly reading the working voltage value through a voltage measuring instrument, the working voltage can also be qualitatively judged by directly observing the intensity of the discharge range of the electrode rod. A large intensity and high brightness of the discharge phenomenon of the electrode rod indicates that the working voltage is relatively high, and vice versa. The observation method can be used to reasonably plan the number of experimental groups and improve the efficiency of equipment debugging.

[0082] The mounting platform 4 includes a connecting plate 41 and a structural component 42; the connecting plate 41 is used to mount the ball mill jar; the structural component 42 has an inverted "V" shaped cross section, including a groove and a mounting member located at the edge of the groove.

[0083] The adjustable vibration motor 6 is set in the groove, leaving enough space for the installation of the ball mill jar body; the mounting components located at the edge are responsible for fixed connection with the elastic components 7; in this way, the adjustable vibration motor 6 is located in the center of the vibration device, and the elastic components 7 are distributed at the edge. When the motor is working, the ball mill jar body 1 can vibrate stably with the mounting platform 4.

[0084] The valve assembly is installed on the first cover plate 12 or the second cover plate 13, including a feed valve 31, a discharge valve 32 and a vacuum valve 33; wherein the feed valve 31 and the discharge valve 32 are located at the two ends of the side wall 11 of the ball mill jar, and the position of the feed valve 31 is higher than that of the discharge valve 32; the vacuum valve 33 is located on the opposite side of the feed valve 31.

[0085] In this embodiment, the inner sides of the first cover plate 12 and the second cover plate 13 at both ends of the ball mill jar sidewall 11 are provided with grooves, and the electrode rod 2 is fixedly connected to the cover plates at both ends by embedding into the grooves. The fixing method is simple and reliable. Furthermore, a blind hole can be provided at one end of the electrode rod 2 to facilitate positioning when installing the electrode rod 2.

[0086] The ball mill jar body 1 is fixedly connected to the connecting plate 41 by a fixed bracket 14; the fixed bracket 14 is electrically connected to the ball mill jar body 1; the fixed bracket 14 is connected to a high-voltage power supply through a wire 8; one end of the electrode rod 2 blank 21 is connected to the high-voltage power supply through a wire 8; thus, when energized, an electric field will be formed between the outer surface of the electrode rod 2 and the inner wall of the ball mill jar.

[0087] Preferably, in this embodiment, the cavity inside the electrode rod 2 blank 21 is cylindrical, which is easy to process and has better consistency. The wear-resistant insulating layer is attached to the surface of the blank by hot melting. The hollow structure not only increases the diameter of the electrode rod, but also improves the structural strength of the electrode rod.

[0088] Since the blank 21 of electrode rod 2 is hollow, the discharge area of ​​the electrode can be increased without significantly increasing the installation weight of electrode rod 2 (the mass of the ball mill jar part remains basically unchanged), the distance between electrode rod 2 and the discharge area on the inner wall of the ball mill jar is reduced, the uniformity of the electric field is improved, the discharge efficiency is increased, the discharge density is increased, and the increase in surface area can also effectively reduce the current density per unit area on the electrode surface and extend the service life of the electrode.

[0089] By adjusting the air pressure inside the tank, a lower working voltage can be obtained, thereby effectively reducing the concentrated discharge of the high-voltage electrode. The electrode rod 2 is covered with a wear-resistant insulating layer 22, which can reduce electrode loss caused by wear and effectively improve the service life of the electrode rod 2.

[0090] Advantages of implementing this invention:

[0091] The electrode rod blank is hollow inside and covered with a wear-resistant insulating layer on the outside, which increases the discharge area and reduces the distance between the electrode and the discharge area on the inner wall of the ball mill jar. This reduces the working voltage, thereby effectively reducing electrode loss caused by concentrated discharge and wear of the high-voltage electrode and extending the service life of the electrode rod. By adjusting the number of counterweights and the installation angle on the swing arm, the amplitude and vibration mode of the equipment can be adjusted to suit the vibration conditions of the equipment. This allows for more uniform mixing and more complete reaction of materials in the ball mill jar, effectively improving the working efficiency of the high-energy ball mill equipment and further reducing the working voltage of the electrode.

[0092] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-energy dry powder ball milling method, characterized in that, Includes the following steps: Step S1: Set up a ball milling device, including a ball milling jar and a vibration starting device; a hollow electrode rod is installed inside the ball milling jar, the electrode rod including a wear-resistant insulating layer and a hollow blank from the outside to the inside; the inner wall of the ball milling jar and the electrode rod are respectively connected to a high-voltage power supply; the vibration starting device includes an adjustable vibration motor; a swing arm is installed at the end of the output shaft of the adjustable vibration motor, and an eccentric counterweight is installed on the swing arm; place the conductive grinding balls and the material to be processed in the ball milling jar; Step S2: Adjust the speed, counterweight mass, and counterweight angle of the adjustable vibration motor to adjust the amplitude and vibration mode of the vibration device until the material and conductive grinding balls are mixed evenly to meet the process requirements, so that the electric field distribution is uniform and the discharge voltage is reduced. Step S3: Change the voltage applied between the inner wall of the ball mill jar and the electrode rod, select the lowest voltage value that meets the process requirements, and reduce the electrode discharge intensity; Step S4: Replace the hollow electrode rod with one of a larger diameter while keeping the ball mill jar specifications unchanged. Gradually shorten the distance between the inner wall of the ball mill jar and the electrode rod, and select the distance value that optimizes the net output and economic benefits of the ball milling device. Step S5: Repeat step S3 to adjust the voltage again to the minimum value required by the process.

2. The high-energy dry powder ball milling method according to claim 1, characterized in that, The vertical distance between the electrode rod and the inner wall of the grinding jar is uniform throughout.

3. The high-energy dry powder ball milling method according to claim 1, characterized in that, Adjusting the vibration mode specifically involves adjusting the amplitude ratio of the vibration starting device in each direction.

4. The high-energy dry powder ball milling method according to claim 1, characterized in that, The grinding jar includes a grinding jar body, an electrode rod, and a valve assembly. The grinding jar body includes a grinding jar sidewall, a first cover plate, and a second cover plate. The two ends of the grinding jar sidewall are fixedly connected to the first cover plate and the second cover plate, respectively. The electrode rod is disposed in the grinding jar body, and its two ends are connected to the first cover plate and the second cover plate, respectively. The electrode rod includes a wear-resistant insulating layer and a blank from the outside to the inside. The blank is hollow, forming a cavity. The valve assembly is disposed on the grinding jar body and communicates with the inside of the grinding jar body. The valve assembly includes a feed valve, a discharge valve, and a vacuum valve. The vibration device includes a mounting platform, a vibration base, and an adjustable vibration motor. The adjustable vibration motor is fixedly connected to the mounting platform. The adjustable vibration motor includes a swing arm with an eccentric counterweight. The grinding jar body is fixed on the mounting platform.

5. The high-energy dry powder ball milling method according to claim 4, characterized in that, The electrode rod is cylindrical; the cavity is a cylindrical cavity.

6. The high-energy dry powder ball milling method according to claim 4, characterized in that, The mounting platform and the vibration base are connected by several elastic components, which include several parallel balance springs.

7. The high-energy dry powder ball milling method according to claim 4, characterized in that, The rotation axis of the swing arm is perpendicular to the mounting platform.

8. The high-energy dry powder ball milling method according to claim 4, characterized in that, The adjustable vibration motor is a dual-output shaft motor, with swing arms at both ends of its output shaft.

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