High-energy dry powder ball milling method

Abstract

The invention discloses a high-energy dry powder ball-milling method. A ball-milling tank and an oscillation starting device are included; by adjusting the amplitude and vibration mode of the vibration starting device, materials in the tank body can be mixed more uniformly, an electric field can be distributed more uniformly, the materials can be crushed by the electric field more easily, the processing efficiency is improved, and the working voltage of the electrode is reduced; the electrodes with larger diameters are gradually replaced, so that the discharge distance can be reduced under the condition that the specification of the ball milling tank is not changed, the electrode discharge area is increased, the electric field uniformity and the discharge efficiency are improved, and the current density per unit area on the surface of the electrode can be effectively reduced, thereby prolonging the service life of the electrode.

Description

Technical Field

[0001] The invention relates to the field of high-energy ball milling, and in particular to a high-energy dry powder ball milling method. Background Art

[0002] Ball milling is a process of crushing and mixing materials by using the impact of the grinding body and the grinding effect between the grinding body and the inner wall of the ball mill. When the ball mill reactor rotates, due to the friction between the grinding body and the inner wall of the ball mill, the grinding body is carried up and then falls down in the direction of rotation, and the materials are continuously crushed under the action of impact force and shear force.

[0003] High-energy ball milling is a method of using the high-speed rotation or vibration of the ball mill to make the hard balls strongly impact, grind and stir the raw materials, and crush the powder into nano-sized particles. There is currently a high-energy ball milling equipment that uses electrode discharge and conductive grinding balls to form an electric field in the tank, and uses the electric field to break through the powder and cooperate with the ball mill to perform high-energy crushing.

[0004] The existing high-energy ball milling equipment has the following shortcomings during use: the electrodes work in a long-term discharge state, and the working voltage is high, concentrated discharge is easily generated on the electrodes, the loss is fast, and the service life is short. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the current high-energy ball milling device, the present invention provides a high-energy dry powder ball milling method, which can achieve the effect of extending the service life of the electrode.

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

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

[0008] Step S1: setting a ball milling device, including a ball milling tank and a vibrating device; an electrode rod is arranged inside the ball milling tank, and the inner wall of the ball milling tank and the electrode rod are respectively connected to a high-voltage power supply; the vibrating device includes an adjustable vibration motor; a counterweight is arranged at the end of the output shaft of the adjustable vibration motor; placing conductive grinding balls and materials to be processed in the ball milling tank;

[0009] Step S2: adjusting the amplitude and vibration mode of the vibration device until the uniformity of the mixture of the material and the conductive grinding balls meets the process requirements;

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

[0011] Step S4: gradually shortening the distance between the inner wall of the ball mill and the electrode rod, and selecting a distance value that optimizes the net output economic benefit of the ball mill;

[0012] Step S5: Repeat step S3.

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

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

[0015] According to one aspect of the present invention, adjusting the vibration mode specifically involves adjusting the ratio of the amplitudes of the vibration generating device in various directions.

[0016] According to one aspect of the present invention, shortening the distance between the inner wall of the ball mill and the electrode rod is specifically replacing an electrode with a larger diameter while keeping the specifications of the ball mill unchanged.

[0017] According to one aspect of the present invention, the ball mill includes a ball mill body, an electrode rod and a valve group; the ball mill body includes a ball mill side wall, a first cover plate and a second cover plate; the two ends of the ball mill side wall are respectively fixed to the first cover plate and the second cover plate; the electrode rod is arranged in the ball mill 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 embryo from the outside to the inside; the embryo is hollow inside to form a cavity; the valve group is arranged on the ball mill body and is connected to the inside of the ball mill body; the vibration device includes a mounting platform, a vibration base and an adjustable vibration motor; the adjustable vibration motor is fixed to the mounting platform; the adjustable vibration motor includes a swing arm, and a counterweight is arranged on the swing arm; the ball mill body is fixed on the mounting platform.

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

[0019] According to one aspect of the present invention, the mounting platform and the vibration base are connected via a plurality of elastic components, and the elastic components include a plurality of parallel balancing springs.

[0020] According to one aspect of the present 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, and swing arms are provided at both ends of the output shaft.

[0022] Advantages of the present invention:

[0023] The electrode rod embryo 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, which can reduce the working voltage, thereby effectively reducing the electrode loss caused by concentrated discharge and wear of the high-voltage electrode and extending the service life of the electrode rod; the equipment amplitude and vibration mode can be adjusted by adjusting the number of counterweights and the installation angle on the swing arm, so as to adjust to the vibration working conditions suitable for the equipment, so that the materials in the ball mill can be mixed more evenly and the reaction is more complete, which effectively improves the working efficiency of the high-energy ball mill equipment and can further reduce the working voltage of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a ball mill according to the present invention Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a ball mill according to the present invention Figure 2 ;

[0027] Figure 3 A schematic diagram of the structure of a ball mill according to the present invention Figure 3 ;

[0028] Figure 4 Schematic diagram of two cases of counterweight angle adjustment.

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

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

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

[0033] Step S1: setting a ball milling device, including a ball milling tank and a vibrating device; an electrode rod is arranged inside the ball milling tank, and the inner wall of the ball milling tank and the electrode rod are respectively connected to a high-voltage power supply; the vibrating device includes an adjustable vibration motor; a counterweight is arranged at the end of the output shaft of the adjustable vibration motor; placing conductive grinding balls and materials to be processed in the ball milling tank;

[0034] Step S2: adjusting the amplitude and vibration mode of the vibration device until the uniformity of the mixture of the material and the conductive grinding balls meets the process requirements;

[0035] Step S3: changing the voltage applied between the inner wall of the ball mill and the electrode rod, and selecting the lowest voltage value that can make the particle size of the processed material meet the process requirements;

[0036] Step S4: gradually shortening the distance between the inner wall of the ball mill and the electrode rod, and selecting a distance value that optimizes the net output economic benefit of the ball mill;

[0037] Step S5: repeat step S3, and similarly adjust the working voltage of the electrode rod to the minimum value that can meet the process requirements.

[0038] In practical applications, the vertical distance between the electrode rod and the inner wall of the ball mill should be equal everywhere, which can ensure uniform discharge on the electrode surface, help form a uniform electric field, and evenly mix the materials to improve the 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 larger the counterweight, the larger the amplitude of the ball mill as a whole. The amplitude and vibration mode required for uniform mixing of materials of different particle sizes and conductive grinding balls may be different, so targeted adjustments are required.

[0040] Adjusting the vibration mode specifically refers to adjusting the ratio of the amplitude of the vibration device in various directions, 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 and the electrode rod is adjusted. Depending on the situation, the voltage can be adjusted step by step from high to low or from low to high. The lowest voltage that can meet the process requirements is found through multiple experimental comparisons.

[0042] In step S4, during the actual debugging process, a more reasonable way is to replace the electrode rod with a larger diameter while keeping the specifications of the ball mill unchanged so as to shorten the distance between the inner wall of the ball mill and the electrode rod (essentially, to reduce the discharge spacing of the electrodes). In theory, the larger the size of the electrode rod, the smaller the discharge spacing. Under the condition of a certain power, the larger the discharge area, the smaller the current density per unit area, which is beneficial to energy saving and protecting the electrode rod. However, if the specifications of the ball mill remain unchanged, the increase in the size of the electrode rod will also cause the effective volume of the ball mill to become smaller, and the processing output of a single batch will decrease. Therefore, the optimal size of the electrode in actual production is to select the electrode rod size with the highest net output economic benefit as the optimal size through multiple experimental comparisons (that is, select the electrode rod size specification that can achieve the best balance between factors such as output, efficiency, energy consumption, and equipment loss).

[0043] In the existing devices that use electric fields for high-energy ball milling, the life of the electrode part is relatively low mainly because the discharge distance of the electrode is large and the working voltage is high, which easily causes concentrated discharge and thus accelerates the loss of the electrode (the pulse discharge formed between the electrode and the material will generate an instantaneous heat, high temperature, and high pressure environment, causing oxidation, ablation, melting and other losses to the electrode material; the electrode loss is directly related to the discharge intensity and the number of discharges. The greater the discharge intensity, the greater the electrode loss; the more discharge times, the more obvious the electrode loss; reducing the discharge distance can reduce the discharge intensity and the electrode working voltage);

[0044] Adjusting the amplitude and vibration mode of the oscillator to make the mixture in the ball mill uniform can make the electric field more evenly distributed and easier to break through the powder, resulting in a more complete reaction and lower discharge voltage; shortening the distance between the electrode and the inner wall of the ball mill, that is, shortening the discharge distance, can improve the uniformity of the electric field and reduce the working voltage;

[0045] In this embodiment, the ball mill is fixed on the vibration device, and the ball mill includes a ball mill body 1, an electrode rod 2 and a valve group; the ball mill body 1 includes a ball mill side wall 11, a first cover plate 12 and a second cover plate 13; the two ends of the ball mill side wall 11 are respectively fixed to the first cover plate 12 and the second cover plate 13; the electrode rod 2 is arranged in the ball mill 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 embryo 21 from the outside to the inside; the embryo 21 is hollow inside to form a cavity; the valve group is arranged on the ball mill body 1, and is connected to the inside of the ball mill body 1;

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

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

[0048] A swing arm 61 is arranged on the output shaft of the adjustable vibration motor 6, and the motor drives the swing arm 61 to rotate and cause vibration; wherein 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, and swing arms 61 are arranged at both ends of its output shaft; in actual application, the installation angle of the swing arm 61 is adjustable, and in a normal state, the swing arm 61 is perpendicular to the output shaft of the adjustable vibration motor 6, and a detachable counterweight is also arranged 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 adding or reducing the counterweight, which is an eccentric sector, 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 the circumferential amplitude to the upper and lower amplitudes);

[0050] In practical applications, the counterweights at both ends are eccentric sectors. When the angle is 0 degrees around the motor shaft, the vertical amplitude is the smallest and the circumferential amplitude is the largest (such as Figure 4 When the counterweights at both ends are distributed at an angle of 180 degrees around the motor shaft, the vertical amplitude is the largest and the circumferential amplitude is the smallest (as shown in the figure). Figure 4 The more counterweights there are, the larger the overall amplitude will be, and vice versa.

[0051] A variety of methods are combined to adjust the whole machine to the appropriate vibration condition, so that the materials (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 through the powder, thereby reducing the discharge voltage and making the reaction more complete. Compared with the traditional high-energy ball mill, it can effectively improve the working efficiency;

[0052] The mounting platform 4 includes a connecting plate 41 and a structural member 42; wherein the connecting plate 41 is used to mount the ball mill tank body; the cross section of the structural member 42 is in the shape of an inverted "J", including a groove and a mounting component located at the edge of the groove.

[0053] The adjustable vibration motor 6 is arranged in the groove to leave enough space for the installation of the ball mill body; the installation component located at the edge is responsible for fixed connection with the elastic component 7; in this way, the adjustable vibration motor 6 is located in the center of the vibration device, and the elastic component 7 is distributed on the edge. When the motor is working, the ball mill body 1 can vibrate stably along with the installation platform 4.

[0054] The valve group is arranged on the first cover plate 12 or the second cover plate 13, and includes a feed valve 31, a discharge valve 32 and a vacuum valve 33; wherein the feed valve 31 and the discharge valve 32 are respectively located at the two ends of the side wall 11 of the ball mill, 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 body 1 is fixedly connected to the connecting plate 41 through a fixing bracket 14; the fixing bracket 14 is electrically connected to the ball mill body 1; the fixing bracket 14 is connected to the high-voltage power supply through a wire 8; one end of the electrode rod 2 embryo 21 is connected to the high-voltage power supply through the wire 8; in this way, when power is turned on, an electric field will be formed between the outer surface of the electrode rod 2 and the inner wall of the ball mill body;

[0056] Preferably, in this embodiment, the cavity inside the embryo 21 of the electrode rod 2 is cylindrical, which is easy to process and has better consistency. The wear-resistant insulating layer is attached to the surface of the embryo 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 embryo 21 of the electrode rod 2 is hollow, the discharge area of ​​the electrode can be increased without significantly increasing the installation weight of the electrode rod 2 (the mass of the ball mill part remains basically unchanged), the distance between the electrode rod 2 and the discharge area of ​​the inner wall of the ball mill is reduced, the uniformity of the electric field is improved, and the discharge efficiency is improved and the discharge density is increased. The increase in surface area can also effectively reduce the current density per unit area of ​​the electrode surface and extend the service life of the electrode.

[0058] Embodiment 2

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

[0060] Step S1: setting a ball milling device, including a ball milling tank and a vibrating device; an electrode rod is arranged inside the ball milling tank, and the inner wall of the ball milling tank and the electrode rod are respectively connected to a high-voltage power supply; the vibrating device includes an adjustable vibration motor; a counterweight is arranged at the end of the output shaft of the adjustable vibration motor; placing conductive grinding balls and materials to be processed in the ball milling tank;

[0061] Step S2: adjusting the amplitude and vibration mode of the vibration device until the uniformity of the mixture of the material and the conductive grinding balls meets the process requirements;

[0062] Step S3: changing the voltage applied between the inner wall of the ball mill and the electrode rod, and selecting the lowest voltage value that can make the particle size of the processed material meet the process requirements;

[0063] Step S4: gradually shortening the distance between the inner wall of the ball mill and the electrode rod, and selecting a distance value that optimizes the net output economic benefit of the ball mill;

[0064] Step S5: repeat step S3, and similarly adjust the working voltage of the electrode rod to the minimum value that can meet the process requirements.

[0065] In practical applications, the vertical distance between the electrode rod and the inner wall of the ball mill should be equal everywhere, which can ensure uniform discharge on the electrode surface, help form a uniform electric field, and evenly mix the materials to improve the 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 larger the counterweight, the larger the amplitude of the ball mill as a whole. The amplitude and vibration mode required for uniform mixing of materials of different particle sizes and conductive grinding balls may be different, so targeted adjustments are required.

[0067] Adjusting the vibration mode specifically refers to adjusting the ratio of the amplitude of the vibration device in various directions, 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 and the electrode rod is adjusted. Depending on the situation, the voltage can be adjusted step by step from high to low or from low to high. The lowest voltage that can meet the process requirements is found through multiple experimental comparisons.

[0069] In step S4, during the actual debugging process, a more reasonable way is to replace the electrode rod with a larger diameter while keeping the specifications of the ball mill unchanged so as to shorten the distance between the inner wall of the ball mill and the electrode rod (essentially, to reduce the discharge spacing of the electrodes). In theory, the larger the size of the electrode rod, the smaller the discharge spacing. Under the condition of a certain power, the larger the discharge area, the smaller the current density per unit area, which is beneficial to energy saving and protecting the electrode rod. However, if the specifications of the ball mill remain unchanged, the increase in the size of the electrode rod will also cause the effective volume of the ball mill to become smaller, and the processing output of a single batch will decrease. Therefore, the optimal size of the electrode in actual production is to select the electrode rod size with the highest net output economic benefit as the optimal size through multiple experimental comparisons (that is, select the electrode rod size specification that can achieve the best balance between factors such as output, efficiency, energy consumption, and equipment loss).

[0070] In the existing devices that use electric fields for high-energy ball milling, the life of the electrode part is relatively low mainly because the discharge distance of the electrode is large and the working voltage is high, which easily causes concentrated discharge and thus accelerates the loss of the electrode (the pulse discharge formed between the electrode and the material will generate an instantaneous heat, high temperature, and high pressure environment, causing oxidation, ablation, melting and other losses to the electrode material; the electrode loss is directly related to the discharge intensity and the number of discharges. The greater the discharge intensity, the greater the electrode loss; the more discharge times, the more obvious the electrode loss; reducing the discharge distance can reduce the discharge intensity and the electrode working voltage);

[0071] Adjusting the amplitude and vibration mode of the oscillator to make the mixture in the ball mill uniform can make the electric field more evenly distributed and easier to break through the powder, resulting in a more complete reaction and lower discharge voltage; shortening the distance between the electrode and the inner wall of the ball mill, that is, shortening the discharge distance, can improve the uniformity of the electric field and reduce the working voltage;

[0072] Furthermore, the working voltage of the electrode rod is also related to the air pressure in the ball mill tank (the lower the air pressure in the tank, the lower the required discharge voltage, that is, the easier it is for discharge to occur, and vice versa). The air pressure in the tank can be adjusted while meeting the process requirements, and the working voltage of the electrode rod can be further reduced.

[0073] In this embodiment, the ball mill is fixed on the vibration device, and the ball mill includes a ball mill body 1, an electrode rod 2 and a valve group; the ball mill body 1 includes a ball mill side wall 11, a first cover plate 12 and a second cover plate 13; the two ends of the ball mill side wall 11 are respectively fixed to the first cover plate 12 and the second cover plate 13; the electrode rod 2 is arranged in the ball mill 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 embryo 21 from the outside to the inside; the embryo 21 is hollow inside to form a cavity; the valve group is arranged on the ball mill body 1, and is connected to the inside of the ball mill body 1;

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

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

[0076] A swing arm 61 is arranged on the output shaft of the adjustable vibration motor 6, and the motor drives the swing arm 61 to rotate and cause vibration; wherein 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, and swing arms 61 are arranged at both ends of its output shaft; in actual application, the installation angle of the swing arm 61 is adjustable, and in a normal state, the swing arm 61 is perpendicular to the output shaft of the adjustable vibration motor 6, and a detachable counterweight is also arranged 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 adding or reducing the counterweight, which is an eccentric sector, 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 the circumferential amplitude to the upper and lower amplitudes);

[0078] In practical applications, the counterweights at both ends are eccentric sectors. When the angle is 0 degrees around the motor shaft, the vertical amplitude is the smallest and the circumferential amplitude is the largest (such as Figure 4 When the counterweights at both ends are distributed at an angle of 180 degrees around the motor shaft, the vertical amplitude is the largest and the circumferential amplitude is the smallest (as shown in the figure). Figure 4 The more counterweights there are, the larger the overall amplitude will be, and vice versa.

[0079] A variety of methods are combined to adjust the whole machine to the appropriate vibration condition, so that the materials (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 through the powder, thereby reducing the discharge voltage and making the reaction more complete. Compared with the traditional high-energy ball mill, it can effectively improve the working efficiency;

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

[0081] Similarly, when adjusting the working voltage of the electrode rod, in addition to directly reading the working voltage value through the voltage measuring instrument, the working voltage can also be qualitatively judged by directly observing the intensity of the discharge range of the electrode rod; if the intensity of the electrode rod discharge phenomenon is large and the brightness is high, it means that the working voltage is relatively high, otherwise it means that the working voltage is low. Through the observation method, the number of experimental groups can be reasonably planned to improve the efficiency of equipment debugging.

[0082] The mounting platform 4 includes a connecting plate 41 and a structural member 42; wherein the connecting plate 41 is used to mount the ball mill tank body; the cross section of the structural member 42 is in the shape of an inverted "J", including a groove and a mounting component located at the edge of the groove.

[0083] The adjustable vibration motor 6 is arranged in the groove to leave enough space for the installation of the ball mill body; the installation component located at the edge is responsible for fixed connection with the elastic component 7; in this way, the adjustable vibration motor 6 is located in the center of the vibration device, and the elastic component 7 is distributed on the edge. When the motor is working, the ball mill body 1 can vibrate stably along with the installation platform 4.

[0084] The valve group is arranged on the first cover plate 12 or the second cover plate 13, and includes a feed valve 31, a discharge valve 32 and a vacuum valve 33; wherein the feed valve 31 and the discharge valve 32 are respectively located at the two ends of the side wall 11 of the ball mill, 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, grooves are provided inside the first cover plate 12 and the second cover plate 13 at both ends of the side wall 11 of the ball mill, and the electrode rod 2 is fixedly connected to the cover plates at both ends by being embedded in the above grooves, and the fixing method is simple and reliable; further, 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 body 1 is fixedly connected to the connecting plate 41 through a fixing bracket 14; the fixing bracket 14 is electrically connected to the ball mill body 1; the fixing bracket 14 is connected to the high-voltage power supply through a wire 8; one end of the electrode rod 2 embryo 21 is connected to the high-voltage power supply through the wire 8; in this way, when power is turned on, an electric field will be formed between the outer surface of the electrode rod 2 and the inner wall of the ball mill body;

[0087] Preferably, in this embodiment, the cavity inside the embryo 21 of the electrode rod 2 is cylindrical, which is easy to process and has better consistency. The wear-resistant insulating layer is attached to the surface of the embryo 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 embryo 21 of the electrode rod 2 is hollow, the discharge area of ​​the electrode can be increased without significantly increasing the installation weight of the electrode rod 2 (the mass of the ball mill part remains basically unchanged), the distance between the electrode rod 2 and the discharge area of ​​the inner wall of the ball mill is reduced, the uniformity of the electric field is improved, and the discharge efficiency and discharge density are increased. The increase in surface area can also effectively reduce the current density per unit area of ​​the electrode surface, thereby extending the service life of the electrode.

[0089] Combined with adjusting the air pressure in the tank, a lower working voltage can be obtained, thereby effectively reducing the concentrated discharge of the high-voltage electrode. The wear-resistant insulating layer 22 coated on the outside of the electrode rod 2 can reduce the electrode loss caused by wear and effectively increase the service life of the electrode rod 2.

[0090] Advantages of the present invention:

[0091] The electrode rod embryo 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, which can reduce the working voltage, thereby effectively reducing the electrode loss caused by concentrated discharge and wear of the high-voltage electrode and extending the service life of the electrode rod; the equipment amplitude and vibration mode can be adjusted by adjusting the number of counterweights and the installation angle on the swing arm, so as to adjust to the vibration working conditions suitable for the equipment, so that the materials in the ball mill can be mixed more evenly and the reaction is more complete, which effectively improves the working efficiency of the high-energy ball mill equipment and can further reduce the working voltage of the electrode.

[0092] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A high-energy dry powder ball milling method, characterized in that: The following steps are involved: Step S1: setting a ball milling device, including a ball milling tank and a vibrating device; an electrode rod is arranged inside the ball milling tank, and the inner wall of the ball milling tank and the electrode rod are respectively connected to a high-voltage power supply; the vibrating device includes an adjustable vibration motor; a counterweight is arranged at the end of the output shaft of the adjustable vibration motor; placing conductive grinding balls and materials to be processed in the ball milling tank; Step S2: adjusting the amplitude and vibration mode of the vibration device until the uniformity of the mixture of the material and the conductive grinding balls meets the process requirements; Step S3: changing the voltage applied between the inner wall of the ball mill and the electrode rod, and selecting the lowest voltage value that meets the process requirements; Step S4: gradually shortening the distance between the inner wall of the ball mill and the electrode rod, and selecting a distance value that optimizes the net output economic benefit of the ball mill; Step S5: Repeat step S3.

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 ball mill is uniform everywhere.

3. The high-energy dry powder ball milling method according to claim 1, characterized in that: The amplitude adjustment of the vibration device is specifically to adjust the rotation speed and the counterweight of the adjustable vibration motor.

4. The high-energy dry powder ball milling method according to claim 1, characterized in that: Adjusting the vibration mode specifically involves adjusting the ratio of the amplitudes of the vibration device in various directions.

5. The high-energy dry powder ball milling method according to claim 1, characterized in that: The shortening of the distance between the inner wall of the ball mill and the electrode rod specifically involves replacing an electrode with a larger diameter while keeping the specifications of the ball mill unchanged.

6. The high-energy dry powder ball milling method according to claim 1, characterized in that: The ball mill includes a ball mill body, an electrode rod and a valve group; the ball mill body includes a ball mill side wall, a first cover plate and a second cover plate; the two ends of the ball mill side wall are fixedly connected to the first cover plate and the second cover plate respectively; the electrode rod is arranged in the ball mill body, and the two ends thereof are connected to the first cover plate and the second cover plate respectively; the electrode rod includes a wear-resistant insulating layer and a embryo from the outside to the inside; the embryo is hollow inside to form a cavity; the valve group is arranged on the ball mill body and is connected to the inside of the ball mill 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 arranged on the swing arm; the ball mill body is fixed on the mounting platform.

7. The high-energy dry powder ball milling method according to claim 6, characterized in that: The electrode rod is cylindrical; the cavity is a cylindrical cavity.

8. The high-energy dry powder ball milling method according to claim 6, characterized in that: The installation platform and the vibration base are connected via a plurality of elastic components, and the elastic components include a plurality of parallel balancing springs.

9. The high-energy dry powder ball milling method according to claim 6, characterized in that: The rotation axis of the swing arm is perpendicular to the mounting platform.

10. The high-energy dry powder ball milling method according to claim 9, characterized in that: The adjustable vibration motor is a double-output shaft motor, and swing arms are arranged at both ends of the output shaft.

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