Ball milling device for preparing nanoscale zirconium powder for electric vacuum

Abstract

The invention discloses a ball-milling device for preparing nanoscale zirconium powder for electric vacuum, and relates to the technical field of zirconium powder ball-milling smashing, the ball-milling device specifically comprises a sealing cover and a control console, the control console is installed on one side of the sealing cover, an overturning table is rotationally connected into the sealing cover, and a rotating disc is movably connected to the top of the overturning table; zirconium powder in the grinding tank is in contact with the grinding balls in a composite motion mode, the lifting plate is lifted in cooperation with pulling force generated by rotation of the balance weight arm, automatic separation of the zirconium powder and the grinding balls in the crushing process is achieved, crushed aggregates adsorbed to the surfaces of the grinding balls form soft layers to be removed during follow-up grinding ball collision, and the crushing efficiency is improved. Collision energy between follow-up grinding balls is enhanced, impact force and shear force are improved, the zirconium powder is made to make contact with the grinding balls again through the through holes between the lifting plates in cooperation with rotation of the overturning table, and the follow-up smashing efficiency and effect of the zirconium powder are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of zirconium powder ball milling, in particular to a ball milling device for preparing nano-level zirconium powder for electric vacuum. Background Art

[0002] Electrovacuum devices are usually used in high vacuum environments, such as electron tubes, X-ray tubes, etc. These devices require high-purity materials, and zirconium powder may be used as a getter to absorb residual gas. Nano-scale zirconium powder has smaller particles, larger specific surface area and higher activity. The key to preparing this zirconium powder is to control the particle size, purity, and prevent contamination.

[0003] As for obtaining nano-scale zirconium powder, ordinary ball mills may not be able to achieve it, so high-energy ball mills are more suitable, such as planetary ball mills or vibration ball mills. These devices can provide higher energy to help refine the particles. At the same time, in terms of material, zirconium powder is highly active and easily oxidized, so the material of the ball mill and grinding balls may need to be stainless steel or more inert materials, such as cemented carbide or ceramics. In order to obtain small-particle zirconium powder, in the specific ball milling process, the adsorption problem between the crushed and refined zirconium powder and the grinding balls must also be considered. If too much crushed material is adsorbed on the surface of the grinding balls, a buffer layer will be formed, which will reduce the collision energy between the grinding balls and lead to reduced grinding efficiency. At the same time, the adsorbed materials may re-agglomerate and affect the particle size distribution of the final powder.

[0004] Therefore, we propose a ball milling device for preparing nano-sized zirconium powder in electric vacuum. Summary of the invention

[0005] The object of the present invention is to provide a ball milling device for preparing nano-scale zirconium powder for electric vacuum, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a ball milling device for preparing nano-level zirconium powder for electric vacuum, comprising a sealing cover and a control console, a control console is installed on one side of the sealing cover, a turning table is rotatably connected in the sealing cover, a turntable is movably connected to the top of the turning table, a cooling cover is evenly fixed to the top of the turntable by bolts, and a ball milling mechanism is installed in the cooling cover;

[0007] The ball mill storage mechanism includes a grinding jar, a jar cover, a movable block and a lifting plate. The grinding jar is installed in the cooling cover, the jar cover is mounted on the grinding jar, the movable blocks are symmetrically installed on the top of the jar cover, one side of the movable block passes through the jar cover and is fixed with a lifting plate by welding, through holes are evenly opened on the lifting plate, a fixed block is fixed on the top of the jar cover and located on the opposite side of the movable block by welding, the outer wall of the grinding jar is evenly opened with limiting grooves, and the top of the jar cover is evenly embedded with balls.

[0008] Further, a hydraulic platform is installed inside the cooling cover and at the bottom of the grinding tank. A transmission shaft is fixedly connected to the bottom of the hydraulic platform. One end of the transmission shaft penetrates through the cooling cover and is sleeved with a gear.

[0009] Further, a motor is fixedly installed on the top of the turntable through bolts. A synchronous belt is connected between the gear sleeved at the end of the motor and the tooth pattern on the periphery of the turntable. A gear ring is fixedly connected to the inner wall of the turntable and on the side of the gear on the transmission shaft. The gear on the transmission shaft meshes with the gear ring.

[0010] Further, a movable sleeve is movably connected to the top of the cooling cover. One side of the movable sleeve penetrates through the cooling cover and is provided with a first slot. A rotating shaft is slidably connected inside the movable sleeve. A second slot is provided in the rotating shaft inside the cooling cover. The first slot slidably abuts against the movable block on the top of the tank cover, and the second slot slidably abuts against the fixed block on the top of the tank cover.

[0011] Further, counterweight arms are symmetrically and rotatably connected to the outer wall of the rotating shaft in a central symmetry manner. Connecting rods are symmetrically and rotatably connected to the outer wall of the movable sleeve in a central symmetry manner. One end of the connecting rod is movably connected to the corresponding outer wall of the counterweight arm.

[0012] Further, a water inlet pipe is movably connected to one end of the central axis of the turntable. A plurality of branch pipes are uniformly communicated with the other end of the central axis of the turntable. The ends of the branch pipes are respectively communicated with the cooling cover.

[0013] Further, a sealing plate is installed on one side of the cooling cover. Lock catches are symmetrically and fixedly installed on the cooling cover through bolts. The two sides of the sealing plate are clamped with the lock catches.

[0014] The usage method of the ball milling device for preparing nanoscale zirconium powder for electro-vacuum applications is as follows:

[0015] Open the sealing plate on the side of the lock catch, press down the hydraulic platform and take out the ball milling mechanism while storing it. Open the tank cover and send the zirconium powder to be ground into the grinding tank. Seal the tank cover and simultaneously fill nitrogen through the gas charging double-channel interface on the tank cover. Then, send the entire grinding tank into the cooling cover. Note that the movable block on the top of the tank cover is clamped into the first slot. Use the hydraulic platform to tightly press the entire grinding tank and install the sealing plate;

[0016] With the outer cover door of the sealing cover closed, add coolant through the control console. The branch pipes connected to the water inlet pipe start to discharge the coolant into the cooling cover. At the same time, the motor on the turntable starts to drive the entire turntable to revolve. While rotating, the gear on the bottom transmission shaft contacts the gear ring, driving the grinding tank to rotate within the cooling cover and start the ball milling and crushing work;

[0017] Variable speed control: The revolution speed of the cooling cover on the turntable increases, the counterweight arm outside the rotating shaft expands, causing the movable sleeve at the end of the connecting rod to rise, pulling the lifting plate of the movable block inside the grinding tank to rise, resulting in the separation of zirconia grinding balls and zirconium powder inside the grinding tank. The zirconia grinding balls collide at the top of the lifting plate, completing the detachment of the adhered zirconium powder on their own. Subsequently, the flipping table rotates 180°. The zirconium powder recontacts the zirconia grinding balls through the through-holes between the lifting plates. Repeat the flipping of the flipping table and the variable-speed rotation of the turntable. After reaching the set ball milling time, take out the grinding tank.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In the present invention, to solve the problem of sticky powder adsorbed on the surface of the grinding balls during the ball milling process of zirconium powder, a simple rotation speed control method is adopted. The hydraulic table drives the grinding tank to rotate self while controlling the rotation of the top rotating shaft. Along with the comparison between the centrifugal force generated by the rotation of the counterweight arm on the outer wall of the rotating shaft and the self-weight of the grinding balls on the lifting plate at the bottom of the movable sleeve, when the centrifugal force is greater than the self-weight of the grinding balls on the lifting plate, the counterweight arm rotates while pulling the movable sleeve contacted by the connecting rod, completing the rising of the lifting plate inside the grinding tank, separating the grinding balls and zirconium powder during the ball milling process. The grinding balls separated from the zirconium powder collide with each other during rotation, vibrating off the zirconium powder adsorbed on the surface of the grinding balls. Subsequently, under the rotation of the entire flipping table, the zirconium powder recontacts the grinding balls through the through-holes between the lifting plates. At this time, the collision energy of the processed grinding balls themselves increases, and the pulverization effect on the zirconium powder is synchronously improved;

[0020] 2. In the present invention, by opening an air inflation dual-channel interface on the lid of the grinding tank, protective gas is filled to prevent the zirconium powder from being pulverized and oxidized in the air. At the same time, high rotation speed can provide more energy, but it will also generate more heat, which may cause the zirconium powder to oxidize or agglomerate. By setting a cooling cover on the outer wall of the grinding tank and injecting coolant before ball milling, the main body of the grinding tank is cooled to prevent the zirconium powder from thermally agglomerating and affecting the subsequent crushing effect. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the ball milling device for preparing nanoscale zirconium powder for electro-vacuum use in the present invention;

[0022] Figure 2 It is a schematic diagram of the motor and turntable on the flipping table in the present invention;

[0023] Figure 3 It is a schematic diagram of the installation structure of the cooling cover on the top of the turntable in the present invention;

[0024] Figure 4 It is a schematic diagram of the contact between the gear and the gear ring on the bottom transmission shaft of the turntable in the present invention;

[0025] Figure 5 It is a schematic diagram of the unfolded side sealing plate of the cooling cover in the present invention;

[0026] Figure 6 This is a schematic diagram of the overall structure of the storage ball milling mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the main view sectional structure of the storage ball milling mechanism of the present invention;

[0028] Figure 8 This is a schematic diagram of the opening of the movable sleeve, the first and second clamping grooves at the end of the rotating shaft of the present invention.

[0029] In the figure: 1. Sealing cover; 2. Control console; 3. Tipping table; 4. Turntable; 5. Cooling cover; 6. Lock; 7. Sealing plate; 8. Hydraulic table; 9. Transmission shaft; 10. Gear ring; 11. Water inlet pipe; 12. Branch pipe; 13. Storage ball milling mechanism; 131. Grinding tank; 132. Tank cover; 133. Limit groove; 134. Movable block; 135. Fixed block; 136. Lifting plate; 137. Through hole; 138. Ball; 14. Movable sleeve; 15. Rotating shaft; 16. Counterweight arm; 17. Connecting rod; 18. First clamping groove; 19. Second clamping groove. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-8 , the present invention provides a technical solution:

[0032] Example 1: When preparing nanoscale zirconium powder required for electro-vacuum devices, the design and operation of the ball milling device need to meet the requirements of high purity, nanoscale particle size, prevention of contamination and oxidation. Therefore, as Figure 1 shown, with a planetary ball milling structure, through the working mode of combining revolution with rotation, it has strong centrifugal force and high energy density, which is suitable for the mechanical refinement of nanoscale powders. The sealing cover 1 is the main body, and the control console 2 installed on one side is used to control the ball milling equipment. A rotatable tipping table 3 is also installed inside the sealing cover 1. The turntable 4 is installed on the side of the tipping table 3. The storage ball milling mechanism 13 for zirconium powder loading and crushing is installed in the cooling cover 5 on the top of the turntable 4;

[0033] Combined with Figure 2 , Figure 3 and Figure 4, a motor is installed on the top of the turntable 3. At the same time, the tooth pattern is set on the side wall of the turntable 4, and the motor is connected to the turntable 4 by a synchronous belt. The rotation of the motor realizes the rotation of the entire turntable 4, which also realizes the revolution operation of the cooling cover 5 and the grinding tank 131. For the rotation of the grinding tank 131, four cooling covers 5 are installed on the turntable 4. The cooling cover 5 is fixed on the turntable 4, and one side of it can be opened. The sealing plate 7 is correspondingly installed. For the fixation of the sealing plate 7, latches 6 are installed on the upper and lower sides of the cooling cover 5. According to the opening position of the latch 6, the sealing plate 7 is pressed in, and the latch 6 automatically completes the locking of the sealing plate 7;

[0034] For the installation of the ball milling mechanism 13 stored inside the cooling cover 5, as Figure 5 shown, a hydraulic table 8 is fixed on the inner wall of the bottom of the grinding tank 131, and the lifting is manually adjusted. The bottom of it is fixedly connected with a transmission shaft 9. The transmission shaft 9 penetrates the cooling cover 5 and is sleeved with a gear. The gear on the transmission shaft 9 is meshed and connected with the gear ring 10 on the inner wall of the bottom of the turntable 3. When the entire turntable 4 rotates on the turntable 3, when the gear at the bottom of the transmission shaft 9 contacts the gear ring 10, it drives the hydraulic table 8 inside the cooling cover 5 to rotate, which realizes the revolution of the entire cooling cover 5 and the rotation of the hydraulic table 8 inside it;

[0035] Since the entire grinding tank 131 is placed on the hydraulic table 8, as Figure 6 shown, a limiting groove 133 is opened on the wall of the grinding tank 131. When the operator puts the grinding tank 131 into the cooling cover 5, pay attention to whether the hydraulic table 8 is docked with the limiting groove 133 on the grinding tank 131. Secondly, a tank cover 132 is installed on the top of the grinding tank 131. With the continuous rise on the hydraulic table 8, the tank cover 132 on the top of the grinding tank 131 contacts the inner wall of the cooling cover 5 and is automatically pressed tightly. At the same time, it is convenient for the subsequent synchronous rotation of the hydraulic table 8 and the grinding tank 131. A plurality of balls 138 are also embedded on the top of the tank cover 132 to improve the overall smoothness of the rotation of the grinding tank 131;

[0036] Three "T"-shaped structures are arranged at the bottom of the tank cover 132. Among them, the two on both sides are movable blocks 134, as Figure 7 shown. The two movable blocks 134 penetrate the top of the tank cover 132 and extend into the grinding tank 131, and are simultaneously connected to the circular lifting plate 136 inside the grinding tank 131. A fixed block 135 is also arranged between the two movable blocks 134 on both sides, and the fixed block 135 is fixed to the top of the tank cover 132;

[0037] Combined with Figure 5 it can be related that a movable sleeve 14 is also installed on the top of the cooling cover 5. A rotating shaft 15 is installed inside the movable sleeve 14. A clamping groove one 18 is opened at the bottom of the movable sleeve 14, and a clamping groove two 19 is opened at the bottom of the rotating shaft 15. When the entire grinding tank 131 is installed into the cooling cover 5, the movable block 134 needs to be clamped into the clamping groove one 18 on the movable sleeve 14;

[0038] Correspondingly, the fixed block 135 automatically abuts against the second slot 19 on the rotating shaft 15. Since the fixed block 135 is fixed to the can lid 132, the entire rotating shaft 15 can only rotate following the grinding can 131 and cannot slide up and down normally. For the entire movable sleeve 14, since the entire movable block 134 is connected to the lifting plate 136, the first slot 18 on the movable sleeve 14 can drive the lifting plate 136 connected to the entire movable block 134 to move up and down;

[0039] Combined with Figure 5 The counterweight arms 16 rotatably connected to the cross-section of the upper rotating shaft 15 are centrosymmetric on both sides and can automatically lift along with the rotation of the rotating shaft 15. On both sides of the movable sleeve 14, connecting rods 17 are rotatably connected, and the connecting rods 17 are correspondingly connected to the counterweight arms 16, resulting in the stretching of the entire movable sleeve 14 while the counterweight arms 16 rotate. However, it is necessary to compare the component of the centrifugal force generated by the rotation of the counterweight arms 16 in the vertical angle with the gravity of the lifting plate 136 connected to the movable sleeve 14. When the rotational speed of the entire turntable 4 is relatively low, the rotational speed of the grinding can 131 connected to the transmission shaft 9 at this time cannot drive the top counterweight arms 16 to unfold. At this time, the lifting plate 136 is located at the bottom inner wall of the grinding can 131, and the placed grinding balls and zirconium powder collide on the top of the lifting plate 136;

[0040] When the rotational speed of the motor on the flipping table 3 increases, the rotational speed of the counterweight arms 16 on the top rotating shaft 15 at this time increases and pulls the entire movable sleeve 14 upward, resulting in the upward movement of the lifting plate 136 during rotation. Due to the setting of the through holes 137 on the lifting plate 136, the large-particle grinding balls are separated from the zirconium powder. Since the grinding balls have carried out impact and crushing work for a period of time at this time, a large amount of zirconium powder is adsorbed on the surface of the grinding balls. The advantage of separating the two is that the grinding balls on the top of the lifting plate 136 start to collide, causing the adsorbed impact to break away and automatically fall to the bottom of the grinding can 131, ensuring the cleanliness of the surface of the grinding can 131 and enhancing the contact force during subsequent grinding of the balls;

[0041] When the entire lifting plate 136 moves to separate the grinding balls from the zirconium powder and the rotational speed of the motor decreases, the lifting plate 136 moves downward. At this time, the zirconium powder cannot automatically pass through the through holes 137 to the side of the grinding balls. Therefore, the flipping table 3 in the sealing cover 1 rotates 180°, turning the entire turntable 4 downward. At this time, combined with Figure 5 it can be understood that the counterweight arms 16 automatically open, the lifting plate 136 remains in a separated state, and the zirconium powder originally located at the bottom of the grinding can 131 automatically extends through the through holes 137 to the top inner wall of the grinding can 131 due to gravity and comes into contact with the processed grinding balls again, starting a new round of ball milling work;

[0042] With the rotation of the turntable 3 and the variable-speed rotation of the motor, the zirconium powder moves frequently in the grinding tank 131 for ball milling, making the zirconium powder break more evenly and completely. When the turntable 3 resets, due to the self-weight of the counterweight arm 16 and the lifting plate 136, the speed of the lifting plate 136 moving to the bottom of the grinding tank 131 is greater than that of the zirconium powder, and the zirconium powder and the grinding balls will be stored on the top of the lifting plate 136. Subsequently, the motor changes speed again, and the turntable 3 rotates, completing the cleaning of the grinding balls and improving the overall ball milling effect of the zirconium powder.

[0043] Embodiment 2: Since the temperature of the inner wall of the grinding tank 131 gradually increases during the ball milling process, to prevent the zirconium powder from undergoing thermal agglomeration due to the temperature rise, a water inlet pipe 11 is movably connected to the bottom of the central axis of the entire turntable 4, and on the other side, branch pipes 12 are evenly connected. Each branch pipe 12 is connected to the cooling cover 5. After the single-side sealing plate 7 of the cooling cover 5 is closed, cooling water is continuously discharged into the cooling cover 5 through the branch pipes 12, and the cooling cover 5 automatically discharges water at the bottom. However, the total water inflow is greater than the water outflow, resulting in a flowing state of the water in the cooling cover 5, and the temperature in the tank is always kept below 50°C.

[0044] Usually, 1-3 wt% of stearic acid or ethanol is added to the zirconium powder as a dispersant in the early stage of ball milling to inhibit particle agglomeration, and then it is removed by vacuum heat treatment, while preventing the zirconium powder from being oxidized. The grinding tank 131 is designed with an inflation dual-channel interface for air exchange operations to ensure an inert gas environment throughout the grinding process, with an oxygen concentration less than 10 ppm.

[0045] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

[0046] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A ball milling device for preparing nano-scale zirconium powder for electric vacuum, comprising a sealing cover (1) and a control console (2), characterized in that: A control console (2) is installed on one side of the sealing cover (1), a turning platform (3) is rotatably connected inside the sealing cover (1), a turntable (4) is movably connected to the top of the turning platform (3), a cooling cover (5) is evenly fixed to the top of the turntable (4) by bolts, and a ball mill storage mechanism (13) is installed inside the cooling cover (5); The ball mill storage mechanism (13) comprises a grinding jar (131), a jar cover (132), a movable block (134) and a lifting plate (136); the grinding jar (131) is installed in the cooling cover (5); the jar cover (132) is sleeved on the grinding jar (131); the movable block (134) is symmetrically installed on the top of the jar cover (132); one side of the movable block (134) penetrates the jar cover (132) and is fixed with the lifting plate (136) by welding; the lifting plate (136) is evenly provided with through holes (137); a fixed block (135) is fixed by welding on the top of the jar cover (132) and located on the opposite side of the movable block (134); the outer wall of the grinding jar (131) is evenly provided with limiting grooves (133); and the top of the jar cover (132) is evenly embedded with balls (138).

2. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 1, characterized in that: A hydraulic platform (8) is installed inside the cooling cover (5) and at the bottom of the grinding tank (131). A transmission shaft (9) is fixedly connected to the bottom of the hydraulic platform (8). One end of the transmission shaft (9) passes through the cooling cover (5) and is sleeved with a gear.

3. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 2, characterized in that: A motor is fixed to the top of the turning platform (3) by bolts, a gear is sleeved on the end of the motor and is connected to a synchronous belt with the outer teeth of the turntable (4), a gear ring (10) is fixedly connected to the inner wall of the turning platform (3) and located on the gear side of the transmission shaft (9), and the gear on the transmission shaft (9) is meshed with the gear ring (10).

4. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 3, characterized in that: The top of the cooling cover (5) is movably connected to a movable sleeve (14), one side of the movable sleeve (14) passes through the cooling cover (5) and is provided with a first clamping groove (18), a rotating shaft (15) is slidably connected inside the movable sleeve (14), the rotating shaft (15) is located inside the cooling cover (5) and is provided with a second clamping groove (19), the first clamping groove (18) is slidably abutted against a movable block (134) at the top of the tank cover (132), and the second clamping groove (19) is slidably abutted against a fixed block (135) at the top of the tank cover (132).

5. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 4, characterized in that: The outer wall section of the rotating shaft (15) is centrally symmetrical and rotatably connected to a counterweight arm (16); the outer wall of the movable sleeve (14) is centrally symmetrical and rotatably connected to a connecting rod (17); one end of the connecting rod (17) is movably connected to the outer wall of the counterweight arm (16) in a corresponding manner.

6. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 5, characterized in that: One end of the central axis of the turntable (4) is movably connected to a water inlet pipe (11), and the other end of the central axis of the turntable (4) is evenly connected to a branch pipe (12), and the ends of the branch pipe (12) are respectively connected to the cooling cover (5).

7. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 6, characterized in that: A sealing plate (7) is installed on one side of the cooling cover (5), and lock buckles (6) are symmetrically fixed on the cooling cover (5) by bolts, and both sides of the sealing plate (7) are snap-connected with the lock buckles (6).

8. A ball milling device for preparing nano-scale zirconium powder for electric vacuum according to claim 7, characterized in that: The method of using the ball milling device for preparing nano-level zirconium powder for electric vacuum is as follows: The sealing plate (7) on the side of the lock (6) is opened, and the ball milling mechanism (13) is taken out while pressing down the hydraulic platform (8), and the zirconium powder to be ground is fed into the grinding jar (131) while the jar cover (132) is opened. Nitrogen is charged into the grinding jar (131) through the inflation dual-channel interface on the jar cover (132) while sealing the jar cover (132). Then, the grinding jar (131) is fed into the cooling cover (5) as a whole. Note that the movable block (134) on the top of the jar cover (132) is inserted into the card slot 1 (18), and the grinding jar (131) is compressed as a whole using the hydraulic platform (8), and the sealing plate (7) is installed. As the outer cover door of the sealing cover (1) is closed, coolant is added through the control console (2), and the branch pipe (12) connected to the water inlet pipe (11) begins to discharge the coolant into the cooling cover (5). At the same time, the motor on the turning table (3) starts to drive the entire turntable (4) to revolve. While rotating, the gear on the bottom transmission shaft (9) contacts the gear ring (10), driving the grinding tank (131) to rotate in the cooling cover (5), and starting the ball milling and crushing work; Speed ​​control is performed, the revolution speed of the cooling cover (5) on the turntable (4) is increased, and the counterweight arm (16) located outside the rotating shaft (15) is expanded outward, causing the movable sleeve (14) at the end of the connecting rod (17) to rise, pulling the lifting plate (136) located in the grinding jar (131) of the movable block (134) to rise, causing the zirconium oxide grinding balls and zirconium powder in the grinding jar (131) to separate, and the zirconium oxide grinding balls collide with the top of the lifting plate (136), completing the separation of the zirconium powder adhering to the zirconium oxide grinding balls, and then the turning table (3) is rotated 180 degrees, and the zirconium powder contacts the zirconium oxide grinding balls again through the through holes (137) between the lifting plates (136), and the turning table (3) is repeatedly turned over and the turntable (4) is rotated at a variable speed, and the grinding jar (131) is taken out after the set ball milling time is reached.

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