A method and apparatus for polishing

Abstract

The present application relates to a kind of grinding method and device.The method includes:1) primary separation is carried out to grinding fluid, and the abrasive with particle size less than 13 μm is obtained;The abrasive obtained after primary separation is carried out secondary separation, and fine abrasive is separated;Fine abrasive is automatically weighed;The particle size of the fine abrasive is 10 μm-13 μm;2) solvent and the abrasive with particle size of 23-61 μm are automatically supplemented and added to the grinding fluid after primary separation, so that the mass content of grinding fluid is kept at 10%-30%;The mass ratio of the added abrasive and the fine abrasive is (1.2-1.3):1.The present application controls the mass ratio of the 23-61 μm abrasive and the fine abrasive added to be (1.2-1.3):1, which can further ensure the particle size of abrasive in grinding fluid, further ensure the grinding efficiency, effectively control the surface roughness of sheet ceramic, improve the quality of processed material and shorten the processing cycle.

Description

Technical Field

[0001] This invention belongs to the field of grinding technology, and in particular relates to a grinding method and apparatus. Background Technology

[0002] Grinding fluid is an important auxiliary material in grinding equipment. In existing grinding equipment, grinding fluid is added once and is generally not adjusted. However, during use, it has been found that the abrasive will rub against the workpiece. As the grinding time increases, the abrasive will gradually wear down and become finer, which will lead to a decrease in grinding efficiency and an inability to control the surface roughness of the workpiece. This results in longer processing time and uncontrollable workpiece quality.

[0003] Therefore, the conventional solution to this problem is to supplement an appropriate amount of coarse abrasive based on the production experience of skilled workers and the actual situation of grinding. However, the quality, timing, and frequency of supplementing the coarse abrasive are inconsistent, which leads to inconsistent coarse abrasive content in the grinding fluid, resulting in unstable processing efficiency and an inability to stably control the surface roughness of the processed parts. Summary of the Invention

[0004] The main objective of this invention is to provide a grinding method and apparatus. The technical problem to be solved is how to provide a grinding method and apparatus that can control the grinding efficiency and the surface roughness of the workpiece.

[0005] The objective of this invention and the technical problem it solves are achieved through the following technical solution. A grinding method according to this invention includes the following steps:

[0006] 1) The grinding slurry is subjected to primary separation to obtain abrasive particles with a particle size of less than 13μm; then the abrasive particles obtained after primary separation are subjected to secondary separation to separate fine abrasive particles;

[0007] Weigh the fine abrasive; the particle size of the fine abrasive is 10μm to 13μm;

[0008] 2) Add solvent and abrasive with a particle size of 23-61 μm to the grinding slurry after primary separation, so that the mass solid content of the grinding slurry is 10%-30%; the mass ratio of the added abrasive to the fine abrasive is (1.2-1.3):1.

[0009] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0010] Preferably, in the aforementioned grinding method, in step 1), the primary separation is achieved by filtering with a 250-625 mesh sieve, and the secondary separation is achieved by filtering with a 1000-1200 mesh sieve.

[0011] Preferably, in the aforementioned grinding method, step 2 is performed when the mass of the fine abrasive accounts for 8% to 10% of the abrasive in the grinding slurry before primary separation.

[0012] Preferably, in the aforementioned grinding method, the solvent includes a rust inhibitor, a dispersant, and deionized water.

[0013] The objective of this invention and the technical problem it solves are further achieved by the following technical solution. A grinding apparatus according to this invention, as shown in the attached figure... Figure 1 As shown, it includes, in sequence:

[0014] Grinding machine;

[0015] The primary mechanism includes a primary material cylinder and a stirring pump mounted on the primary material cylinder; the primary material cylinder is connected to the grinding mill via a circulation pipeline; the primary material cylinder is also equipped with a feed hopper and a water supply pipe; the feed hopper is equipped with a feed valve; the feed valve is connected to a feed controller; the circulation pipeline includes an inlet pipe and a outlet pipe, and the grinding liquid can be discharged from the grinding mill into the primary material cylinder through the outlet pipe, and then returned to the grinding mill through the inlet pipe to achieve circulation;

[0016] The secondary mechanism includes a secondary material cylinder and a secondary screen installed inside the secondary material cylinder; the secondary material cylinder is connected to the primary material cylinder through an overflow pipe; the connection between the overflow pipe and the primary material cylinder is the overflow pipe inlet, and the primary screen is installed at the overflow pipe inlet; the ratio of the height of the primary material cylinder to the height of the overflow pipe inlet is 1:0.7 to 0.8; the secondary screen is connected to a weight monitor; the weight monitor is electrically connected to the feeding controller.

[0017] Preferably, in the aforementioned grinding apparatus, one end of the feed pipe connected to the primary feed cylinder extends to the bottom of the primary feed cylinder.

[0018] Preferably, in the aforementioned grinding device, the water supply pipe is provided with a water supply valve; the water supply valve is connected to a water level monitor.

[0019] Preferably, in the aforementioned grinding apparatus, the mesh size of the primary sieve is 250 to 625 mesh.

[0020] Preferably, in the aforementioned grinding apparatus, the secondary sieve has a mesh size of 1000 to 1200 mesh.

[0021] Preferably, the aforementioned grinding device further includes a three-stage mechanism; the three-stage mechanism includes a three-stage material cylinder; a liquid outlet pipe is provided on the two-stage material cylinder; one end of the liquid outlet pipe is located below the two-stage screen, and the other end is connected to the three-stage material cylinder.

[0022] By employing the above technical solutions, the grinding method and apparatus proposed in this invention have at least the following advantages:

[0023] 1. Abrasive particles smaller than 13μm are generated by friction during the grinding process. The presence of these particles reduces grinding efficiency. Fine abrasive particles with a particle size of 10μm to 13μm are the main component. This invention first separates the abrasive particles smaller than 13μm through primary separation, and then separates the fine abrasive particles from the particles smaller than 13μm through secondary separation. The particles are weighed, and abrasive replenishment is performed based on the weighing results. This ensures the particle size of the abrasive particles in the grinding fluid, thereby ensuring grinding efficiency and effectively controlling the surface roughness of the sheet ceramics. This improves the quality of the processed materials and shortens the processing cycle.

[0024] 2. The device of the present invention is provided with a primary mechanism, a secondary mechanism, and a tertiary mechanism. The primary mechanism includes a primary feed cylinder, which collects the grinding fluid flowing out of the grinder. At this time, the grinding fluid contains abrasive particles of different sizes and a grinding fluid solvent. Under the action of stirring, the larger abrasive particles will sink, and the smaller abrasive particles will float. As the grinding fluid continues to flow in, the primary feed cylinder will overflow. Under the action of the primary screen, abrasive particles with a size greater than 13μm can remain in the primary feed cylinder, while abrasive particles with a size less than 13μm and some particles can float. The grinding slurry solvent overflows into the secondary mechanism, which is equipped with a secondary filter screen. The secondary screen screen can screen out fine abrasive particles with a particle size of less than 13μm. The quality of the fine abrasive particles on the secondary filter screen is monitored by a weight monitor connected to the secondary filter screen. The amount of abrasive particles with a particle size of 23-61μm is then controlled based on the quality, thereby controlling the particle size of the abrasive particles in the grinding slurry, ensuring grinding efficiency, effectively controlling the surface roughness of the sheet ceramic, and thus achieving controllable quality of the processed parts.

[0025] 3. The device of the present invention is equipped with a feeding controller and a weight monitor. The weight monitor monitors the quality of the fine abrasive on the secondary filter screen and then transmits the information to the feeding controller. The feeding controller then controls the opening and closing time of the connected feeding valve, thereby controlling the amount of abrasive added with a particle size of 23-61μm. This enables online monitoring of the abrasive, achieves automatic feeding, reduces the risk of human error, reduces uncontrollable risks, effectively avoids the influence of human factors on the grinding process, and thus improves the quality of the processed parts.

[0026] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the grinding device of the present invention. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a grinding method and apparatus according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0029] One embodiment of the present invention provides a grinding method comprising the following steps:

[0030] 1) The grinding slurry is subjected to primary separation to obtain abrasive particles with a particle size of less than 13μm; then the abrasive particles obtained after primary separation are subjected to secondary separation to separate fine abrasive particles;

[0031] Weigh the fine abrasive; the particle size of the fine abrasive is 10μm to 13μm;

[0032] 2) Add solvent and abrasive with a particle size of 23-61 μm to the grinding slurry after primary separation, so that the mass solid content of the grinding slurry is 10%-30%; the mass ratio of the added abrasive to the fine abrasive is (1.2-1.3):1.

[0033] During the grinding process, the abrasives in the grinding slurry are worn away. At this time, the main components of the grinding slurry are abrasives with a particle size >13μm, abrasives with a particle size ≤13μm, and solvent. Among them, abrasives with a particle size ≤13μm will affect the grinding efficiency and grinding quality. This invention sorts out abrasives with a particle size ≤13μm, thereby ensuring grinding efficiency, ensuring the surface roughness of the sheet ceramics, improving product quality, and reducing the cost of using the grinding slurry.

[0034] This invention obtains fine abrasive through two separation processes. The separated fine abrasive is weighed, and then the amount of abrasive with a particle size of 23-61 μm is added according to the weight control. This invention controls the mass ratio of the added abrasive with a particle size of 23-61 μm to the mass of fine abrasive to be (1.2-1.3):1, which can effectively ensure the content of abrasive with a particle size >13 μm in the grinding fluid. If too little abrasive is added, the content of abrasive with a particle size >13 μm in the grinding system will be too low, which will lead to the inability to control the surface roughness of the flake ceramics during the grinding process, the inability to control product quality, and the reduction of grinding efficiency. Secondly, this invention controls the added abrasive to be slightly higher than the weighed mass of fine abrasive because during the grinding process, some abrasive particles will have a particle size of less than 10 μm. Therefore, in order to ensure the mass solid content of the grinding fluid, a certain compensation coefficient is designed, which leads to the added abrasive being slightly higher than the weighed mass of fine abrasive.

[0035] This invention controls the solid content of the grinding slurry to be 10% to 30%. The solid content of the grinding slurry is controlled by controlling the amount of added solvent and abrasive. The solvent can be newly added or recycled. By controlling the solid content, the abrasive content in the grinding slurry can be guaranteed, thereby effectively controlling the surface roughness of the sheet ceramics during use, improving grinding efficiency, and shortening the process time.

[0036] Preferably, in the aforementioned grinding method, in step 1), the primary separation is achieved by filtering with a 250-625 mesh sieve, and the secondary separation is achieved by filtering with a 1000-1200 mesh sieve.

[0037] Preferably, in the aforementioned grinding method, step 2 is performed when the mass of the fine abrasive accounts for 8% to 10% of the abrasive in the grinding slurry before primary separation.

[0038] This invention controls the addition of abrasive by adjusting the quality of the fine abrasive. Simultaneously, abrasive replenishment begins when the fine abrasive accounts for 8%–10% of the abrasive in the grinding slurry before primary separation. The reason is that while frequent abrasive replenishment can continuously adjust the content of abrasive particles larger than 13μm in the grinding slurry, it also causes frequent opening and closing of the replenishment valve. Since abrasive continues to be added even when the valve is closed, frequent replenishment results in the actual added abrasive mass far exceeding the target amount. This leads to a high abrasive content in the grinding slurry system. To maintain a solid content of 10%–30% in the grinding slurry, more grinding slurry solvent needs to be added, resulting in an excessive amount of grinding slurry in the system. If the system becomes bloated, it can cause the stirring pump to malfunction, making the process impossible. However, if the frequency of abrasive replenishment is too low, the abrasive content in the grinding slurry will fluctuate significantly, making it impossible to effectively control the surface roughness during the grinding of sheet ceramics. This results in excessively different surface roughness and inconsistent quality of the processed sheet ceramics. The present invention replenishes abrasive when the mass of fine abrasive accounts for 8% to 10% of the abrasive in the grinding slurry before primary separation. This ensures that the content of abrasive particles larger than 13μm in the grinding slurry system increases steadily without causing large fluctuations. This allows for effective control of the surface roughness of the sheet ceramics during the grinding process, improving the quality of the processed ceramics.

[0039] Preferably, in the aforementioned grinding method, the solvent includes a rust inhibitor, a dispersant, and deionized water.

[0040] The objective of this invention and the technical problem it solves are further achieved by the following technical solution. A grinding apparatus according to this invention comprises, in sequence:

[0041] Grinding machine;

[0042] The primary mechanism 1 includes a primary material cylinder 1-1 and a stirring pump 1-4 mounted on the primary material cylinder 1-1; the primary material cylinder 1-1 is connected to the grinding mill 4 through a circulation pipeline.

[0043] The primary feed cylinder 1-1 is also equipped with a feed hopper 1-5 and a water supply pipe 1-7; the feed hopper 1-5 is equipped with a feed valve 1-5-1; the feed valve 1-5-1 is connected to a feed controller 1-6;

[0044] The circulation pipeline includes a feed pipe 1-3 and a discharge pipe 1-2. The grinding liquid is discharged from the grinder into the primary material cylinder 1-1 through the discharge pipe 1-2. Under the action of the stirring pump 1-4, it returns to the grinder 4 through the feed pipe 1-3 to achieve circulation.

[0045] Secondary mechanism 2 includes a secondary material cylinder 2-1 and a secondary screen 2-3 assembled inside the secondary material cylinder 2-1;

[0046] The connection between the overflow pipe 2-2 and the primary material cylinder 1-1 is the overflow pipe inlet, and the overflow pipe inlet is equipped with a primary screen 1-9;

[0047] The ratio of the height of the primary feed cylinder 1-1 to the height of the inlet of the overflow pipe 2-2 is 1:0.7 to 0.8;

[0048] The secondary screen 2-3 is connected to a weight monitor 2-4; the weight monitor 2-4 is electrically connected to the feeding controller 1-6.

[0049] This invention uses a weight monitor on a secondary screen to monitor the quality of fine abrasive. When the monitored quality reaches 8% to 10% of the abrasive in the grinding slurry before primary separation, the weight monitor sends the monitored quality to the feeding controller. The feeding controller uses the quality monitored by the weight monitor to control the opening and closing of the feeding valve, thereby controlling the amount of abrasive with a particle size of 23 to 61 μm added.

[0050] The ratio of the height of the primary feed cylinder to the inlet height of the overflow pipe is 1:0.7 to 0.8, which allows overflow to occur when the liquid level in the primary feed cylinder is 70% to 80%. Due to the stirring action of the stirring pump, the smaller abrasive particles will float to the surface and enter the secondary feed cylinder along with the overflowing grinding fluid. Under the action of the secondary screen in the secondary feed cylinder, the fine abrasive particles can be separated, while the finer abrasive particles will flow with the grinding fluid into the tertiary mechanism for processing. This allows the quality monitored by the weight monitor to more accurately reflect the quality of the worn abrasive particles, and to make the replenishment amount of abrasive particles with a particle size of 23 to 61 μm more accurate. It also stabilizes the content of large-diameter abrasive particles in the grinding fluid. As a result, during the use of the grinding fluid, the surface roughness of the flake ceramics can be effectively controlled, the grinding efficiency can be improved, and the processing time can be shortened.

[0051] In this invention, the feeding controller can receive signals from the weight monitor and automatically adjust the opening and closing of the feeding valve through the signals, thereby realizing automatic online control of feeding abrasive with a particle size of 23-61μm, improving the automation level of the process line, thus avoiding human operation errors and reducing the impact of uncontrollable risks on grinding.

[0052] Preferably, in the aforementioned grinding apparatus, one end of the feed pipe 1-3 connected to the primary feed cylinder 1-1 extends to the bottom of the primary feed cylinder 1-1.

[0053] Extending one end of the feed pipe to the bottom of the primary feed cylinder ensures that the abrasive in the grinding fluid reaches the bottom of the primary feed cylinder first. Under the stirring action, more abrasive particles smaller than 13μm can float to the upper layer of the feed cylinder, while abrasive particles larger than 13μm will remain at the bottom of the primary feed cylinder and be pumped into the grinding mill by the stirring pump.

[0054] At this point, it is necessary to control the stirring rate of the agitator pump. If the stirring rate of the agitator pump is too fast, the large-diameter abrasive particles at the bottom of the primary feed cylinder will float to the surface. Although the primary screen can prevent the large-diameter abrasive particles from running away, too many large-diameter abrasive particles accumulating on the surface of the primary screen will clog the screen, causing the primary screen to lose its function. Consequently, abrasive particles with a particle size of less than 13μm in the grinding fluid cannot be removed, which will gradually reduce the grinding efficiency and the surface roughness of the flake ceramics. Furthermore, the filter clogging will prevent the process from operating normally, forcing the equipment to stop processing and causing losses. On the other hand, if the stirring rate is too high, the liquid level in the primary feed cylinder will fluctuate greatly, resulting in inaccurate values ​​detected by the water level monitor. Consequently, it will be impossible to determine the amount of water to replenish, leading to an out-of-control mass solids content in the grinding fluid, and thus an inability to control the surface roughness of the flake ceramics.

[0055] If the stirring rate is too slow, a large number of abrasive particles smaller than 13μm in the grinding fluid will not be separated, resulting in a large amount of abrasive particles smaller than 13μm at the bottom of the primary feed cylinder. This reduces the grinding efficiency and the surface roughness of the sheet ceramics. Furthermore, since the fine abrasive cannot be completely separated, the amount of abrasive particles with a size of 23-61μm added will be too low, further reducing the grinding efficiency and the surface roughness of the sheet ceramics. Consequently, the processing cycle and surface quality become uncontrollable.

[0056] Preferably, in the aforementioned grinding device, the water supply pipe 1-7 is provided with a water supply valve 1-7-1, and the water supply valve 1-7-1 is connected to a water level monitor 1-8.

[0057] The water level monitor in this invention can detect the liquid level in the primary feed cylinder, and then control the opening and closing of the water supply valve by monitoring the water level, thereby enabling fully automatic control of the solid content in the grinding fluid, avoiding human error and reducing the impact of uncontrollable risks on grinding.

[0058] Preferably, in the aforementioned grinding apparatus, the mesh size of the primary sieves 1-9 is 250 to 625 mesh.

[0059] Preferably, in the aforementioned grinding apparatus, the secondary screen 2-3 has a mesh size of 1000-1200 mesh.

[0060] Preferably, the aforementioned grinding device further includes a three-stage mechanism 3; the three-stage mechanism 3 includes a three-stage material cylinder 3-1; a liquid outlet pipe is provided on the two-stage material cylinder 2-1; one end of the liquid outlet pipe 3-3 is located below the two-stage screen 2-3, and the other end is connected to the three-stage material cylinder 3-1.

[0061] After two separation processes in the primary and secondary barrels, a certain amount of finer abrasive particles remain. These fine particles will settle in the tertiary barrel, and the grinding fluid solvent in the tertiary barrel will be discharged through the outlet for reuse or direct discharge into the environment. The settled finer abrasive particles will be removed manually. This reduces the impact of fine abrasive particles on the grinding fluid system during reuse and also reduces the environmental damage caused by fine abrasive particles.

[0062] Example 1

[0063] A grinding method specifically includes the following steps:

[0064] 1) Take 150kg of grinding fluid solvent and 50kg of abrasive to prepare 200kg of grinding fluid. Turn on the grinder, place the sheet ceramic, add the prepared grinding fluid, and start grinding. After the grinding fluid and sheet ceramic are ground, it is discharged from the discharge pipe and enters the primary material cylinder. Under the action of the stirring and feeding pump, the grinding fluid at the bottom of the primary material cylinder returns to the grinder through the feed pipe, realizing the normal circulation of the grinding fluid.

[0065] 2) Turn on the water level monitor to monitor the water level in the primary feed cylinder. When the water level in the primary feed cylinder is below 70%, the water level monitor controls the water supply valve to start supplying water until the water level in the primary feed cylinder reaches 70%.

[0066] 3) Turn on the weight monitor to monitor the quality of the fine abrasive on the secondary screen. Then turn on the feeding controller. When the weight monitor detects that the quality of the fine abrasive on the secondary screen is 0.4kg, it sends the weight back to the feeding controller. The feeding controller then opens the feeding valve to feed 0.48kg of abrasive, completing the automatic feeding of abrasive.

[0067] Example 2

[0068] A grinding method specifically includes the following steps:

[0069] 1) Take 150kg of grinding fluid solvent and 50kg of abrasive to prepare 200kg of grinding fluid. Turn on the grinder, place the sheet ceramic, add the prepared grinding fluid, and start grinding. After the grinding fluid and sheet ceramic are ground, it is discharged from the discharge pipe and enters the primary material cylinder. Under the action of the stirring and feeding pump, the grinding fluid at the bottom of the primary material cylinder returns to the grinder through the feed pipe, realizing the normal circulation of the grinding fluid.

[0070] 2) Turn on the water level monitor to monitor the water level in the primary feed cylinder. When the water level in the primary feed cylinder is below 75%, the water level monitor controls the water supply valve to start supplying water until the water level in the primary feed cylinder reaches 75%.

[0071] 3) Turn on the weight monitor to monitor the quality of the fine abrasive on the secondary screen. Then turn on the feeding controller. When the weight monitor detects that the quality of the fine abrasive on the secondary screen is 0.45kg, it sends the weight back to the feeding controller. The feeding controller then opens the feeding valve to feed 0.59kg of abrasive, completing the automatic feeding of abrasive.

[0072] Example 3

[0073] A grinding method specifically includes the following steps:

[0074] 1) Take 150kg of grinding fluid solvent and 50kg of abrasive to prepare 200kg of grinding fluid. Turn on the grinder, place the sheet ceramic, add the prepared grinding fluid, and start grinding. After the grinding fluid and sheet ceramic are ground, it is discharged from the discharge pipe and enters the primary material cylinder. Under the action of the stirring and feeding pump, the grinding fluid at the bottom of the primary material cylinder returns to the grinder through the feed pipe, realizing the normal circulation of the grinding fluid.

[0075] 2) Turn on the water level monitor to monitor the water level in the primary feed cylinder. When the water level in the primary feed cylinder is below 80%, the water level monitor controls the water supply valve to start supplying water until the water level in the primary feed cylinder reaches 80%.

[0076] 3) Turn on the weight monitor to monitor the quality of the fine abrasive on the secondary screen. Then turn on the feeding controller. When the weight monitor detects that the quality of the fine abrasive on the secondary screen is 0.5kg, it sends the weight back to the feeding controller. The feeding controller then opens the feeding valve to feed 0.63kg of abrasive, completing the automatic feeding of abrasive.

[0077] Comparative Example 1

[0078] The sheet ceramics are ground using conventional double-sided grinding equipment. The grinding fluid is prepared by adding an irregular amount of grinding fluid solvent and abrasive based on human experience.

[0079] Detecting the solids content of the grinding slurry:

[0080] The grinding slurry is placed in a foil box and weighed, then heated and dried. After drying, it is weighed again to obtain the solid content of the grinding slurry.

[0081] The solid content of the grinding fluids in Examples 1-3 was tested and is shown in the table below.

[0082] Table 1

[0083] Solid content (%) 24.2 24.8 24.5

[0084] Surface roughness testing of processed sheet ceramics (GB3505-83):

[0085] The surface roughness of the sheet ceramics processed in Examples 1-3 and Comparative Example 1 was tested and is as follows:

[0086] Table 2

[0087] Surface roughness (μm) 0.4～0.6 0.45～0.55 0.45～0.55 0.3～0.8

[0088] In the description of the invention, it should be noted that the terms "upper", "lower", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the method or positional relationship shown in the drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0089] Furthermore, in the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0090] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A grinding method, characterized in that, It includes the following steps: 1) The grinding slurry is subjected to primary separation to obtain abrasive particles with a particle size of less than 13 μm; The abrasive obtained from the first separation is then subjected to a second separation to separate fine abrasive. Weigh the fine abrasive; the particle size of the fine abrasive is 10μm to 13μm; 2) Add solvent and abrasive with a particle size of 23-61 μm to the grinding slurry after primary separation, so that the mass solid content of the grinding slurry is 10%-30%; the mass ratio of the added abrasive to the fine abrasive is (1.2-1.3):

1.

2. The grinding method according to claim 1, characterized in that, In step 1): the primary separation is achieved by filtering through a 250-625 mesh screen, and the secondary separation is achieved by filtering through a 1000-1200 mesh screen.

3. The grinding method according to claim 1, characterized in that, When the mass of the fine abrasive accounts for 8% to 10% of the abrasive in the grinding slurry before primary separation, proceed to step 2).

4. The grinding method according to claim 1, characterized in that, The solvent includes rust inhibitors, dispersants, and deionized water.

5. A grinding apparatus, characterized in that... It includes, in order: Grinding machine; The primary mechanism includes a primary material cylinder and a stirring pump mounted on the primary material cylinder; the primary material cylinder is connected to the grinding mill via a circulation pipeline; the primary material cylinder is also equipped with a feed hopper and a water supply pipe; the feed hopper is equipped with a feed valve; the feed valve is connected to a feed controller; the circulation pipeline includes an inlet pipe and a outlet pipe, and the grinding liquid can be discharged from the grinding mill into the primary material cylinder through the outlet pipe, and then returned to the grinding mill through the inlet pipe to achieve circulation; The secondary mechanism includes a secondary material cylinder and a secondary screen assembled inside the secondary material cylinder; the secondary material cylinder is connected to the primary material cylinder through an overflow pipe; the connection between the overflow pipe and the primary material cylinder is the overflow pipe inlet, and the overflow pipe inlet is equipped with a primary screen; The ratio of the height of the primary feed cylinder to the height of the overflow pipe inlet is 1:0.7 to 0.8; the secondary screen is connected to a weight monitor; the weight monitor is electrically connected to the feeding controller.

6. The grinding apparatus according to claim 5, characterized in that: One end of the feed pipe that is connected to the primary feed cylinder extends to the bottom of the primary feed cylinder.

7. The grinding apparatus according to claim 5, characterized in that: The water supply pipe is equipped with a water supply valve; the water supply valve is connected to a water level monitor.

8. The grinding apparatus according to claim 5, characterized in that: The mesh size of the primary sieve is 250 to 625 mesh.

9. The grinding apparatus according to claim 5, characterized in that: The mesh size of the secondary screen is 1000-1200 mesh.

10. The grinding apparatus according to claim 5, characterized in that: It also includes a three-stage mechanism; the three-stage mechanism includes a three-stage material cylinder; a liquid outlet pipe is provided on the two-stage material cylinder; one end of the liquid outlet pipe is located under the two-stage screen, and the other end is connected to the three-stage material cylinder.

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