Zirconia powder wet grinding and dispersing device and process

Abstract

The application relates to the technical field of material grinding, in particular to a zirconium oxide powder wet grinding and dispersing device and process, which comprises an upward-opening grinding tank, a grinding column is rotationally arranged in the grinding tank, an adjusting groove is arranged in the grinding column, a jacking mechanism is arranged in the adjusting groove, an annular variable-diameter strip realizes a diameter expansion action under the drive of a variable-diameter assembly, the annular variable-diameter strip is driven to move upwards at the same time as the diameter expansion is synchronously completed, the annular variable-diameter strip extrudes the side wall of the grinding column and promotes the deformation of the side wall in the process; when the annular variable-diameter strip moves downwards, the circular adjusting plate no longer implements the diameter expansion operation on the annular variable-diameter strip, at this moment, the annular variable-diameter strip resets, through the up-and-down reciprocating movement, the annular variable-diameter strip continuously applies periodic alternating stress to the side wall of the grinding column, and the deformation generated by the periodic alternating stress can extrude and grind the zirconium oxide.

Description

Technical Field

[0001] This application relates to the technical field of material grinding, and in particular to a wet grinding and dispersion device and process for zirconia powder. Background Technology

[0002] Zirconia, as an important ceramic material, is widely used in electronics, optics, biomedicine, and the automotive industry. Zirconia powder plays a crucial role in industrial applications due to its unique physical and chemical properties, such as enhancing the strength and corrosion resistance of materials. However, the processing and mixing of zirconia powder often encounters the problem of inconsistent particle sizes, which not only affects product quality but may also limit its further application in several fields.

[0003] Therefore, effectively improving the uniformity of zirconia particle size has become an urgent technical problem to be solved. For example, patent application CN213700137U provides a wet regrinding system for zirconia powder, which includes a feeding mechanism that can be transferred between various grinding mechanisms and a grinding mechanism. By utilizing the interaction between the grinding rod on the rotating shaft and the inner wall of the grinding jar, zirconia can be wet-grinded. At the same time, multiple grinding mechanisms can work together to increase output, and a single feeding mechanism can be used to save costs.

[0004] The existing technology described above has the following problems when wet grinding zirconia: In the existing technology, zirconia is ground by friction between the grinding rod and the grinding jar. During this process, the friction is constant, which means that the grinding force cannot be dynamically adjusted according to the real-time state of the powder. When the initial particle size of the zirconia powder is large or there are hard agglomerates, the constant friction is not enough to break the agglomerate structure quickly. This not only prolongs the grinding cycle, but may also lead to uneven particle size distribution due to insufficient grinding.

[0005] Furthermore, when using the aforementioned existing technology, only the external force can be applied to zirconia in the horizontal direction, and the direction of the force is relatively singular, which affects the grinding effect of zirconia.

[0006] Therefore, there is still room for improvement in the existing technology for wet grinding of zirconia. Summary of the Invention

[0007] To address the aforementioned technical problems, this application provides a wet grinding and dispersion apparatus and process for zirconia powder, employing the following technical solution:

[0008] In a first aspect, a wet grinding and dispersing apparatus for zirconia powder includes a grinding jar with its opening facing upwards, a grinding column rotatably disposed inside the grinding jar, an adjusting groove being formed inside the grinding column, and a top support mechanism being disposed inside the adjusting groove, wherein the top support mechanism includes:

[0009] Annular grooves are evenly arranged along the height of the grinding column and are located on the side wall of the adjustment groove.

[0010] Multiple annular variable diameter bars are provided, each corresponding to an annular groove, and are slidably disposed inside the annular groove.

[0011] The diameter-changing component is located inside the adjusting groove and cooperates with the annular diameter-changing bar.

[0012] Preferably, the top of the grinding column is set as a frustum, and multiple guide grooves are evenly formed on the frustum along its circumference.

[0013] Preferably, the top of the grinding jar is provided with a C-shaped frame with an opening facing the grinding column. The vertical section of the C-shaped frame is installed on the grinding jar. The bottom of the horizontal section of the C-shaped frame is equipped with a rotating shaft through a bearing, and the bottom end of the rotating shaft is installed on the top of the truncated cone surface of the grinding column. The bottom of the horizontal section of the C-shaped frame is symmetrically provided with connecting protrusions along the length of the horizontal section of the C-shaped frame, and the bottom of the connecting protrusions is jointly equipped with a funnel-shaped feed frame, and the rotating shaft passes through the feed frame.

[0014] Preferably, the diameter-changing assembly includes multiple circular adjustment plates with the same diameter as the annular diameter-changing bar and each plate is fitted with an annular guide slope that fits into the annular diameter-changing bar. A drive rod is mounted on all the circular adjustment plates.

[0015] Preferably, the outer wall of the annular variable diameter bar is uniformly provided with multiple balls along its circumference, the inner wall of the annular variable diameter bar is uniformly provided with multiple spherical protrusions along its circumference, the side wall of the circular adjusting plate is provided with multiple spherical grooves that cooperate with the spherical protrusions, and the top side edge of the circular adjusting plate is uniformly provided with multiple inverted L-shaped limiting frames along its circumference. The vertical section of the limiting frame is installed on the circular adjusting plate, and the horizontal section of the limiting frame abuts against the annular variable diameter bar.

[0016] Preferably, a plurality of obstructing rods are evenly arranged along the circumference of the bottom of the grinding column, and an annular clearance groove that cooperates with the obstructing rods is provided on the inner side wall of the grinding tank.

[0017] Preferably, the bottom of the grinding column is provided with multiple rectangular grooves evenly distributed along its circumference, and a grinding roller is installed inside the rectangular grooves via bearings.

[0018] Preferably, a sieve pipe is installed at the middle of the bottom of the grinding tank and is connected to it. A sieve screen is installed at the bottom of the sieve pipe, an overflow window is opened on the sieve pipe, and an annular collection frame that cooperates with the overflow window is installed on the outer wall of the sieve pipe.

[0019] Preferably, a rotating shaft is installed at the bottom of the grinding column, and the end of the rotating shaft away from the grinding column passes through the bottom of the grinding tank and is set inside the screening tube. An agitator that cooperates with the screening screen is set at the end of the rotating shaft located in the screening tube.

[0020] Secondly, a wet grinding and dispersion process for zirconia powder includes the following steps:

[0021] S1: Feeding preparation: Pour the zirconium oxide aqueous solution into the gap between the grinding jar and the grinding column, and make the rotating shaft rotate.

[0022] S2: Grinding process, the rotating shaft drives the side wall of the grinding column to rotate during the grinding process to grind the zirconium oxide aqueous solution.

[0023] S3: Secondary grinding. During the rotation of the rotating shaft, the bottom of the grinding column is driven to perform secondary grinding on the zirconium oxide aqueous solution obtained in S2.

[0024] S4: Sieving and collecting. The zirconium oxide aqueous solution obtained from S3 is sieved through a sieve to obtain zirconium oxide and its aqueous solution with appropriate particle size.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The annular variable diameter strip designed in this invention achieves a diameter expansion action under the drive of the variable diameter assembly. While the annular variable diameter strip moves upward, it simultaneously completes the diameter expansion. During this process, it squeezes the side wall of the grinding column and causes it to deform. When the annular variable diameter strip moves downward, the circular adjustment plate no longer performs the diameter expansion operation on the annular variable diameter strip. At this time, the annular variable diameter strip resets. Through this up-and-down reciprocating motion, the annular variable diameter strip continuously applies periodic alternating stress to the side wall of the grinding column. The deformation generated by the periodic alternating stress can perform extrusion grinding treatment on zirconia.

[0027] During the rotation of the grinding column, the aforementioned alternating stress is further transferred to the zirconium oxide aqueous solution in the grinding system, causing the deformed part of the grinding column to interact with the sidewall of the grinding roller to generate dynamic friction on the zirconium oxide. This synergistic effect of periodic stress and dynamic friction can significantly increase the collision frequency and grinding intensity of zirconium oxide particles, thereby ensuring more thorough zirconium oxide grinding.

[0028] 2. The grinding roller designed in this invention can perform secondary grinding on the zirconium oxide aqueous solution after grinding the side wall of the grinding column during the rotation of the grinding column, so as to ensure the grinding effect of zirconium oxide.

[0029] 3. The stirring frame designed in this invention can agitate the zirconium oxide accumulated on the screening mesh during rotation. The continuous mechanical disturbance breaks the particle agglomeration, fundamentally preventing large zirconium oxide particles from clogging the screening mesh. At the same time, the stirring frame can also disperse large zirconium oxide particles that have not passed the screening and suspend them in the water flow. With the driving force of the water flow, they are discharged from the overflow window. This dual anti-clogging mechanism can not only maintain the permeability of the screening mesh, but also avoid the possibility of a decrease in screening efficiency due to the continuous accumulation of large particles on the screen surface. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0031] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the grinding column of the present invention.

[0032] Figure 3 This is a three-dimensional installation structure diagram of the C-shaped frame, rotating shaft, and feeding frame of the present invention.

[0033] Figure 4 This is a schematic diagram of the three-dimensional installation structure between the annular variable diameter bar, the circular adjusting plate, and the ball bearings of the present invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the relationship between the bottom of the grinding column and the inside of the grinding tank in this invention.

[0035] Figure 6 This is the present invention. Figure 5 Enlarged view of a portion of point A in the middle.

[0036] Figure 7 This is a schematic diagram of the three-dimensional installation structure between the grinding column and the grinding roller of the present invention.

[0037] Figure 8 This is a schematic diagram of the three-dimensional installation structure between the sieve tube, rotating shaft, and stirring frame of the present invention.

[0038] Figure 9 This is a schematic diagram of the three-dimensional installation structure between the screening pipe and the screening screen of the present invention.

[0039] Figure 10 This is a flow chart of the wet grinding and dispersion process of zirconium oxide powder according to the present invention.

[0040] Explanation of reference numerals in the attached drawings: 1. Grinding jar; 11. C-shaped frame; 111. Lifting rod; 112. Annular reset ring; 12. Rotating shaft; 13. Feed frame; 2. Grinding column; 21. Guide groove; 22. Grinding roller; 23. Obstruction rod; 24. Annular clearance groove; 25. Rectangular groove; 3. Adjustment groove; 4. Top support mechanism; 41. Annular groove; 42. Annular variable diameter bar; 43. Variable diameter assembly; 431. Circular adjusting plate; 432. Drive rod; 433. Ball bearing; 434. Spherical protrusion; 435. Spherical groove; 436. Limiting frame; 5. Screening tube; 51. Screening screen; 52. Overflow window; 53. Annular collection frame; 54. Rotating shaft; 55. Agitator. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1 to 10 This application will be described in further detail.

[0042] This application discloses a wet grinding and dispersing apparatus and process for zirconia powder. By applying alternating stress to the zirconia aqueous solution in combination with secondary grinding, the grinding effect of zirconia is improved.

[0043] Example 1:

[0044] Reference Figure 1 as well as Figure 2 A wet grinding and dispersing device for zirconia powder includes a grinding tank 1 with its opening facing upwards. A grinding column 2 is rotatably arranged inside the grinding tank 1. An adjusting groove 3 is opened inside the grinding column 2. A top support mechanism 4 is arranged inside the adjusting groove 3. The top support mechanism 4 includes:

[0045] Annular grooves 41 are evenly arranged along the height of the grinding column 2 and are located on the side wall of the adjusting groove 3.

[0046] Multiple annular variable diameter bars 42 are provided, each corresponding to an annular groove 41, and are slidably disposed inside the annular groove 41.

[0047] The diameter-changing component 43 is disposed inside the adjusting groove 3 and cooperates with the annular diameter-changing bar 42.

[0048] The annular variable diameter strip 42 is made of rubber. Under the drive of the variable diameter assembly 43, the annular variable diameter strip 42 expands in diameter, and the diameter expansion is completed simultaneously while the annular variable diameter strip 42 moves upward. During this process, the side wall of the grinding column 2 is squeezed and deformed. When the annular variable diameter strip 42 moves downward, the circular adjustment plate 431 no longer expands the diameter of the annular variable diameter strip 42, and the annular variable diameter strip 42 is reset.

[0049] Through this reciprocating motion, the annular variable diameter bar 42 continuously applies periodic alternating stress to the side wall of the grinding column 2. The deformation generated by the periodic alternating stress can perform extrusion grinding on the zirconium oxide.

[0050] During the rotation of the grinding column 2, the aforementioned alternating stress is further transferred to the zirconium oxide aqueous solution in the grinding system, causing the deformed part of the grinding column 2 to interact with the sidewall of the grinding roller 22 to generate dynamic friction force on the zirconium oxide. This synergistic effect of periodic stress and dynamic friction force can significantly increase the collision frequency and grinding intensity of zirconium oxide particles, thereby ensuring more thorough zirconium oxide grinding.

[0051] Reference Figure 3 The top of the grinding column 2 is set as a frustum, and multiple guide grooves 21 are evenly opened on the frustum along its circumference.

[0052] The grinding jar 1 is provided with a C-shaped frame 11 with its opening facing the grinding column 2. The vertical section of the C-shaped frame 11 is installed on the grinding jar 1. The bottom of the horizontal section of the C-shaped frame 11 is equipped with a rotating shaft 12 through a bearing. The bottom end of the rotating shaft 12 is installed on the top of the truncated cone surface of the grinding column 2. The bottom of the horizontal section of the C-shaped frame 11 is symmetrically provided with connecting protrusions along the length of the horizontal section of the C-shaped frame 11. The bottom of the connecting protrusions is equipped with a funnel-shaped feed frame 13, and the rotating shaft 12 passes through the feed frame 13.

[0053] When the zirconium oxide aqueous solution is injected from the top of the frustum, the solution can form a uniform diffusion flow along the frustum due to the tilt angle and smooth surface of the frustum, thereby smoothly guiding it to the gap between the grinding column 2 and the grinding jar 1.

[0054] In the specific workflow, the zirconium oxide aqueous solution is first placed in the feed frame 13. The funnel-shaped structure of the feed frame 13 enables the initial guidance and flow control of the zirconium oxide aqueous solution, allowing it to leak at a stable rate onto the frustum surface at the top of the grinding column 2. Subsequently, under the combined action of gravity and the slope of the frustum surface, the zirconium oxide aqueous solution spreads evenly along the circumference and gradually seeps into the gap between the grinding column 2 and the grinding jar 1.

[0055] To further optimize the flow path of the zirconium oxide aqueous solution, this design adds guide grooves 21 to the frustum surface. These guide grooves 21 are radially distributed, which can form directional constraints on the zirconium oxide aqueous solution on the frustum surface, effectively avoiding the random flow phenomenon of zirconium oxide aqueous solution caused by uneven surface tension or external disturbance. This fundamentally solves the problem of unbalanced zirconium oxide aqueous solution distribution that is prone to occur in traditional structures, ensuring that the zirconium oxide aqueous solution entering the gap maintains a uniform flow rate in the circumferential direction, and providing a reliable guarantee for the stability of the subsequent grinding process and the consistency of the grinding effect.

[0056] Before the device is put into operation, an external drive motor is installed on the horizontal section of the frame 11. The output shaft of the external drive motor is then connected to the rotating shaft 12 via a belt drive. Since the external drive motor and the belt drive are common knowledge, they are not shown in the figure. When the zirconium oxide aqueous solution flows into the gap between the grinding tank 1 and the grinding column 2, the external drive motor is started to drive the rotating shaft 12 to rotate via the belt drive. During the rotation of the rotating shaft 12, the grinding column 2 is driven to rotate. During the rotation of the grinding column 2, its side wall and the inner wall of the grinding tank 1 cooperate with each other to grind the zirconium oxide aqueous solution.

[0057] Reference Figure 4 The diameter-changing assembly 43 includes multiple circular adjustment plates 431 with the same diameter as the annular diameter-changing bar 42 and which are matched one by one. The circular adjustment plates 431 are provided with annular guide slopes that match the annular diameter-changing bar 42. A drive rod 432 is installed on all the circular adjustment plates 431.

[0058] The outer side wall of the annular variable diameter bar 42 is uniformly provided with multiple balls 433 along its circumference, and the inner side wall of the annular variable diameter bar 42 is uniformly provided with multiple spherical protrusions 434 along its circumference. The side wall of the circular adjusting plate 431 is provided with multiple spherical grooves 435 that cooperate with the spherical protrusions 434, and the spherical protrusions 434 and the spherical grooves 435 are in clearance fit.

[0059] It should be noted that the annular variable diameter bar 42 is slidably fitted into the annular groove 41, and the inner wall of the annular variable diameter bar 42 is in contact with the annular guide slope of the circular adjusting plate 431. It can move axially along the annular groove 41 and expand radially under the drive of the variable diameter assembly 43. During the normal upward movement of the circular adjusting plate 431, it is on the annular guide slope. That is, during the upward movement of the circular adjusting plate 431, the annular variable diameter bar 42 is driven to move upward through the annular guide slope. At this time, the annular variable diameter bar 42 moves a certain distance on the annular guide slope, but will not completely leave the annular guide slope. At this time, the annular variable diameter bar 42 will expand to a certain extent. A lifting cylinder (existing technology, not shown in the figure) is installed at the bottom of the adjusting groove 3, and the extension end of the lifting cylinder is connected to the drive rod 432.

[0060] In operation, after the lifting cylinder is activated, its telescopic end extends upward and drives the drive rod 432 to move upward synchronously. The drive rod 432 then drives the circular adjusting plate 431 to move upward as well. During the upward movement of the circular adjusting plate 431, the annular variable diameter strip 42 is continuously driven upward by the guiding action of the annular guide slope. When the annular variable diameter strip 42 moves to the top position of the annular groove 41, it stops moving upward due to the mechanical limiting action of the top of the annular groove 41. Meanwhile, the circular adjusting plate 431 continues to move upward under the continuous action of the drive rod 432. At this time, the annular guide slope will exert a lateral compressive force on the annular variable diameter strip 42, forcing the annular variable diameter strip 42 to undergo elastic deformation, thereby achieving radial expansion.

[0061] During the expansion process of the annular reducing bar 42, the ball bearings 433 are simultaneously pushed to abut against the side wall of the annular groove 41. When the annular guide ramp completely disengages from the annular reducing bar 42, the circumferential surface of the circular adjusting plate 431 forms a tight fit with the inner wall of the annular reducing bar 42, until the spherical protrusion 434 on the circular adjusting plate 431 engages in the spherical groove of the annular reducing bar 42. At this point, the annular reducing bar 42 and the circular adjusting plate 431 form a rigid whole, which exerts a uniform compressive force on the side wall of the grinding column 2, causing controllable deformation of the side wall. Through this mechanical linkage, the deformation characteristics of the grinding column 2 are utilized to actively apply additional pressure to the inner wall of the grinding jar 1, thereby significantly improving the grinding uniformity and efficiency of the zirconium oxide aqueous solution.

[0062] When it is necessary to remove the circular adjusting plate 431 from the annular variable diameter bar 42, the lifting cylinder is activated to retract its telescopic end. Through the coordinated action of the drive rod 432 and the circular adjusting plate 431, the annular variable diameter bar 42 is pulled downward until it contacts the bottom of the annular groove 41. At this time, due to the limiting effect of the bottom of the annular groove 41, the annular variable diameter bar 42 stops moving downward, while the drive rod 432 continues to drive the circular adjusting plate 431 to move downward. During this process, the spherical protrusion 434 overcomes the elastic resistance of the annular variable diameter bar 42 and disengages from the spherical groove until the circular adjusting plate 431 is completely removed from the inner side of the annular variable diameter bar 42.

[0063] It should be noted that the ball bearing 433 can reduce the friction between the annular variable diameter strip 42 and the annular groove 41, and avoid wear of the annular variable diameter strip 42 on the inner wall of the annular groove 41.

[0064] In the above-mentioned method of using the circular adjusting plate 431 and the annular variable diameter strip 42 to engage, the pressure of the annular variable diameter strip 42 on the side wall of the grinding column 2 is still a static pressure. At this time, the friction between the side wall of the grinding column 2 and the inner side wall of the grinding tank 1 is also a static friction. In order to further improve the grinding effect of the zirconium oxide aqueous solution, the limiting frame 436 provided by the present invention can apply alternating stress to the zirconium oxide aqueous solution by cooperating with the circular adjusting plate 431. Specifically, multiple inverted L-shaped limiting frames 436 are evenly arranged along the circumference of the top side edge of the circular adjusting plate 431. The vertical section of the limiting frame 436 is installed on the circular adjusting plate 431, and the horizontal section of the limiting frame 436 abuts against the annular variable diameter strip 42.

[0065] In actual operation, after the lifting cylinder is activated, its telescopic end extends upward and drives the drive rod 432 to move upward synchronously. The drive rod 432 then drives the circular adjusting plate 431 to move upward accordingly. During the upward movement of the circular adjusting plate 431, the annular variable diameter strip 42 is continuously driven upward by the guiding effect of the annular guide slope. At this time, the annular variable diameter strip 42 will expand to a certain extent under the action of the annular guide slope. When the annular variable diameter strip 42 moves to the top position of the annular groove 41, the telescopic end of the drive cylinder contracts. At this time, the drive rod 432 drives the circular adjusting plate 431 to move downward. During the downward movement of the circular adjusting plate 431, the annular guide slope no longer acts on the annular variable diameter strip 42. At this time, the annular variable diameter strip 42 is reset and its inner diameter is reduced. In order to prevent the annular variable diameter strip 42 from getting stuck on the annular groove 41, the horizontal section of the limit frame 436 can drive the annular variable diameter strip 42 to move downward synchronously.

[0066] Repeating the above actions, the annular variable diameter strip 42 expands its diameter under the drive of the circular adjusting plate 431, moving the annular variable diameter strip 42 upwards while simultaneously expanding its diameter. During this process, the side wall of the grinding column 2 is squeezed and deformed. When the annular variable diameter strip 42 moves downwards, the circular adjusting plate 431 stops expanding the diameter of the annular variable diameter strip 42, and the annular variable diameter strip 42 returns to its original position. Through this up-and-down reciprocating motion, the annular variable diameter strip 42 continuously applies periodic alternating stress to the side wall of the grinding column 2. The deformation generated by the periodic alternating stress can perform extrusion grinding on the zirconia.

[0067] During the rotation of the grinding column 2, the aforementioned alternating stress is further transferred to the zirconium oxide aqueous solution in the grinding system, causing the deformed part of the grinding column 2 to interact with the sidewall of the grinding roller 22 to generate dynamic friction force on the zirconium oxide. This synergistic effect of periodic stress and dynamic friction force can significantly increase the collision frequency and grinding intensity of zirconium oxide particles, thereby ensuring more thorough zirconium oxide grinding.

[0068] Reference Figure 5 as well as Figure 6 The bottom of the circumferential surface of the grinding column 2 is provided with a plurality of obstruction rods 23 evenly arranged along its circumference, and the inner side wall of the grinding tank 1 is provided with an annular relief groove 24 that cooperates with the obstruction rods 23.

[0069] During operation, the zirconium oxide aqueous solution, after being ground by the sidewall of the grinding column 2, flows downwards along the surface of the grinding column 2, eventually dripping into the bottom of the grinding jar 1 in the form of droplets or streams. During this process, the obstruction rod 23 installed in the gap between the grinding column 2 and the inner wall of the grinding jar 1 forms a flexible barrier against the falling zirconium oxide aqueous solution. That is, when the solution comes into contact with the obstruction rod 23, its falling trajectory changes, and some of the liquid flows back along the surface of the rod to the sidewall of the grinding column 2, participating in the grinding cycle again.

[0070] This design effectively avoids the problem of insufficient grinding caused by the solution falling too fast, and indirectly prolongs the residence time of the solution in the grinding area, so that the zirconium oxide particles can fully contact the grinding media and improve the grinding uniformity.

[0071] Furthermore, when the side wall of the grinding column 2 deforms due to the action of the annular variable diameter strip 42, the resulting radial stress may cause the connected obstruction rod 23 to displace horizontally. The annular relief groove 24 pre-cut in the inner wall of the grinding tank 1 provides sufficient buffer space for this horizontal displacement, which not only avoids rigid collision between the obstruction rod 23 and the tank wall, but also ensures the stable operation of its blocking function, thereby maintaining the continuous operation of the entire grinding system.

[0072] Reference Figure 7 The bottom of the grinding column 2 has multiple rectangular grooves 25 evenly distributed around its circumference, and the grinding roller 22 is installed inside the rectangular groove 25 through bearings.

[0073] In practice, when the grinding column 2 rotates, the bottom grinding roller 22 moves synchronously with the column, while simultaneously rotating under the viscous resistance of the zirconium oxide aqueous solution and the friction of the inner wall of the grinding tank 1. This combined motion allows the grinding roller 22 to perform secondary shearing and grinding on the zirconium oxide aqueous solution that has been initially ground by the side wall of the grinding column 2. At the same time, the wedge-shaped flow channel formed between the grinding roller 22 and the wall of the rectangular groove 25 generates a squeezing and grinding effect on the solution, further improving the dispersibility of the system. Through this secondary grinding mechanism, the problem of uneven particle size caused by single grinding is effectively avoided, ensuring that the final grinding effect meets the requirements of raw materials for high-precision ceramic preparation.

[0074] Reference Figure 8 as well as Figure 9 In order to ensure the grinding effect of the device, the sieve 51 provided by the present invention can also perform sieve treatment on the ground zirconium oxide aqueous solution. Specifically, a sieve pipe 5 is installed in the middle of the bottom of the grinding tank 1 and is connected to it. A sieve 51 is installed at the bottom of the sieve pipe 5. An overflow window 52 is opened on the sieve pipe 5. An annular collection frame 53 that cooperates with the overflow window 52 is installed on the outer wall of the sieve pipe 5.

[0075] A rotating shaft 54 ​​is installed at the bottom of the grinding column 2. The end of the rotating shaft 54 ​​away from the grinding column 2 passes through the bottom of the grinding tank 1 and is set inside the sieve tube 5. An agitator 55 that cooperates with the sieve screen 51 is set at one end of the rotating shaft 54 ​​located in the sieve tube 5.

[0076] The stirring frame 55 consists of a fixed ring mounted on the rotating shaft 54 ​​and multiple straight plates evenly mounted on the outside of the fixed ring in a circumferential direction. It can adapt to the grinding diameter of zirconia by changing the mesh size of the sieve 51. In specific operation, when the grinding column 2 starts to rotate, it will drive the rotating shaft 54 ​​to rotate synchronously. The rotation of the rotating shaft 54 ​​will further drive the stirring frame 55 to rotate. During the rotation, the stirring frame 55 can effectively stir the zirconia accumulated on the sieve 51.

[0077] This continuous mechanical agitation breaks up the agglomeration of zirconium oxide particles, fundamentally preventing large zirconium oxide particles from clogging the screening screen 51 and ensuring smooth screening. Simultaneously, as the agitator 55 rotates, it disperses any large zirconium oxide particles that fail to pass through the screen, resuspending them in the water flow. Then, driven by the water flow itself, these large zirconium oxide particles are discharged from the overflow window 52 on the screening pipe 5 and enter the annular collection frame 53.

[0078] This dual anti-clogging mechanism not only maintains the high permeability of the screening mesh 51, but also effectively avoids the problem of large particles accumulating on the screen surface, which leads to a decrease in screening efficiency, greatly improving the stability and efficiency of the entire screening process.

[0079] Through the above screening process, zirconium oxide particles with a diameter larger than the mesh diameter of screening mesh 51 are trapped on screening mesh 51 and then flow into the annular collection frame 53 under the influence of water flow. Afterwards, the zirconium oxide aqueous solution collected in the annular collection frame 53 can be poured back into the grinding tank 1 for further grinding to ensure that the final zirconium oxide particles meet the requirements. Zirconium oxide particles with a diameter smaller than the mesh diameter of screening mesh 51 will pass smoothly through screening mesh 51 and flow out, and are finally collected and processed by staff, completing the entire grinding and screening process.

[0080] Example 2: Refer to Figure 10 Based on Embodiment 1, lifting rods 111 are symmetrically arranged along the length of the horizontal section of the shaped frame 11, and the lifting rods 111 are slidably installed on the horizontal section of the shaped frame 11. A ring-shaped reset ring 112 with the same diameter as the grinding column 2 is installed at the bottom of the lifting rods 111.

[0081] In actual operation, after the grinding is completed, all internal components of the device are reset. At this time, the lifting rod 111 is driven to move down by external driving force (cylinder, etc.). During the downward movement of the lifting rod 111, the annular reset ring 112 can perform pressure treatment on the deformed position of the grinding column 2, so that the circumferential surface of the grinding column 2 is reset to the initial state, in preparation for the next grinding.

[0082] Finally, the present invention also provides a wet grinding and dispersion process for zirconia powder, comprising the following steps:

[0083] S1: Feeding preparation: Pour the zirconium oxide aqueous solution into the gap between the grinding tank 1 and the grinding column 2, and make the rotating shaft 12 rotate.

[0084] S2: Grinding process. The annular variable diameter strip 42 expands its diameter under the drive of the circular adjusting plate 431. While the annular variable diameter strip 42 moves upward, it expands its diameter simultaneously. During this process, it squeezes the side wall of the grinding column 2 and causes it to deform. When the annular variable diameter strip 42 moves downward, the circular adjusting plate 431 no longer expands the diameter of the annular variable diameter strip 42. At this time, the annular variable diameter strip 42 is reset. Through this up-and-down reciprocating motion, the annular variable diameter strip 42 continuously applies periodic alternating stress to the side wall of the grinding column 2. The deformation generated by the periodic alternating stress can perform extrusion grinding on the zirconia.

[0085] S3: Secondary grinding. When the grinding column 2 rotates, the bottom grinding roller 22 will move in a circular motion synchronously with the column. At the same time, it will rotate under the action of the viscous resistance of the zirconium oxide aqueous solution and the friction of the inner wall of the grinding tank 1. This combined motion enables the grinding roller 22 to perform secondary shearing and grinding on the zirconium oxide aqueous solution that has been initially ground by the side wall of the grinding column 2.

[0086] S4: Screening and Collection. The zirconium oxide aqueous solution obtained in S3 is screened through screening mesh 51. Zirconia particles with a diameter larger than the mesh diameter of screening mesh 51 are trapped on screening mesh 51 and then flow into the annular collection frame 53 under the influence of water flow. Afterwards, the zirconium oxide aqueous solution collected in the annular collection frame 53 can be poured back into the grinding tank 1 for re-grinding to ensure that the final zirconium oxide particles meet the requirements. Those zirconium oxide particles with a diameter smaller than the mesh diameter of screening mesh 51 will pass smoothly through screening mesh 51 and flow out, and are finally collected and processed by the staff.

[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0088] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wet grinding and dispersing apparatus for zirconium oxide powder, comprising a grinding jar (1) with its opening facing upwards, characterized in that: A grinding column (2) is rotatably mounted inside the grinding jar (1). An adjustment groove (3) is provided inside the grinding column (2). A top support mechanism (4) is provided inside the adjustment groove (3). The top support mechanism (4) includes: Annular grooves (41) are evenly arranged along the height of the grinding column (2) and are set on the side wall of the adjustment groove (3); Multiple annular variable diameter bars (42) are provided and correspond one-to-one with the annular grooves (41), and are slidably disposed inside the annular grooves (41); The variable diameter assembly (43) is disposed inside the adjusting groove (3) and cooperates with the annular variable diameter bar (42); The variable diameter assembly (43) includes multiple circular adjustment plates (431) that are equal in diameter to and cooperate with the annular variable diameter bar (42). The circular adjustment plates (431) are provided with annular guide slopes that cooperate with the annular variable diameter bar (42). A drive rod (432) is installed on the circular adjustment plates (431). The outer side wall of the annular variable diameter bar (42) is uniformly provided with multiple balls (433) along its circumference, and the inner side wall of the annular variable diameter bar (42) is uniformly provided with multiple spherical protrusions (434) along its circumference. The side wall of the circular adjusting plate (431) is provided with multiple spherical grooves (435) that cooperate with the spherical protrusions (434). During the expansion process of the annular variable diameter bar (42), the ball (433) is pushed to abut against the side wall of the annular groove 41. When the annular guide slope completely disengages from the annular variable diameter bar (42), the circumferential surface of the circular adjustment plate (431) and the inner wall of the annular variable diameter bar (42) form a tight fit until the spherical protrusion (434) on the circular adjustment plate (431) is inserted into the spherical groove of the annular variable diameter bar (42).

2. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: The top of the grinding column (2) is set as a frustum, and multiple guide grooves (21) are evenly opened on the frustum along its circumference.

3. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: The grinding jar (1) is provided with a C-shaped frame (11) with its opening facing the grinding column (2) at the top. The vertical section of the C-shaped frame (11) is installed on the grinding jar (1). The bottom of the horizontal section of the C-shaped frame (11) is equipped with a rotating shaft (12) through a bearing. The bottom end of the rotating shaft (12) is installed on the top of the truncated cone surface of the grinding column (2). The bottom of the horizontal section of the C-shaped frame (11) is symmetrically provided with connecting protrusions along the length of the horizontal section of the C-shaped frame (11). The bottom of the connecting protrusions is equipped with a funnel-shaped feed frame (13). The rotating shaft (12) passes through the feed frame (13).

4. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: Multiple inverted L-shaped limit frames (436) are evenly arranged along the circumference of the top side of the circular adjustment plate (431). The vertical section of the limit frame (436) is installed on the circular adjustment plate (431), and the horizontal section of the limit frame (436) abuts against the annular variable diameter bar (42).

5. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: The bottom of the circumferential surface of the grinding column (2) is uniformly provided with multiple obstruction rods (23), and the inner side wall of the grinding tank (1) is provided with an annular relief groove (24) that cooperates with the obstruction rods (23).

6. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: The bottom of the grinding column (2) is evenly provided with multiple rectangular grooves (25) along its circumference, and a grinding roller (22) is installed inside the rectangular groove (25) through a bearing.

7. The wet grinding and dispersing device for zirconium oxide powder according to claim 1, characterized in that: A sieve pipe (5) is installed in the middle of the bottom of the grinding tank (1). A sieve screen (51) is installed at the bottom of the sieve pipe (5). An overflow window (52) is opened on the sieve pipe (5). An annular collection frame (53) that cooperates with the overflow window (52) is installed on the outer wall of the sieve pipe (5).

8. The wet grinding and dispersing apparatus for zirconium oxide powder according to claim 7, characterized in that: A rotating shaft (54) is installed at the bottom of the grinding column (2). The end of the rotating shaft (54) away from the grinding column (2) passes through the bottom of the grinding tank (1) and is set inside the sieve tube (5). A stirring frame (55) that cooperates with the sieve screen (51) is set at the end of the rotating shaft (54) located in the sieve tube (5).

9. A wet grinding and dispersion process for zirconia powder, comprising a wet grinding and dispersion apparatus for zirconia powder as described in any one of claims 1-8, characterized in that, The process includes the following steps: S1: Feeding preparation: Pour the zirconium oxide aqueous solution into the gap between the grinding tank (1) and the grinding column (2) and make the rotating shaft (12) rotate; S2: Grinding process, the rotating shaft (12) drives the side wall of the grinding column (2) to rotate during the rotation process to grind the zirconium oxide aqueous solution; S3: Secondary grinding, during the rotation of the rotating shaft (12), the bottom of the grinding column (2) is driven to perform secondary grinding on the zirconium oxide aqueous solution obtained in S2; S4: Sieving and collecting, the zirconium oxide aqueous solution obtained from S3 is sieved through a sieve screen (51) to obtain zirconium oxide and its aqueous solution with appropriate particle size.

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