Circulating water treatment system for steel ball hard grinding process

Abstract

The utility model provides a circulating water treatment system for a steel ball hard grinding process, and belongs to the technical field of a whole set of equipment designed for feeding or clarifying cooling liquid on a grinding machine. The steel ball hard grinding process circulating water treatment system comprises a circulating sedimentation tank, at least two grinding machines, a liquid discharge pipe, a liquid suction pipe, a sewage suction pipe and a solid-liquid separator, circulating water used by the grinding machines is directly discharged into the circulating sedimentation tank through the liquid discharge pipe, and the sewage suction pipe extends into the bottom of the circulating sedimentation tank; the solid-liquid separator is used for directly pumping the sludge accumulated in the circulating sedimentation tank for a period of time into the solid-liquid separator for separation or pumping the sludge into the temporary sedimentation tank firstly and then separating the sludge through the solid-liquid separator. With the adoption of the sludge treatment device, sludge is finally separated through the solid-liquid separator, and manual cleaning can be carried out without shutdown, so that the labor intensity of workers is reduced. The normal recycling of circulating water is not influenced in the working process of the solid-liquid separator, and the production efficiency is not influenced. And the solid-liquid separator does not need to be in a working state all the time, so that energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to a circulating water treatment system for a steel ball hard grinding process, belonging to the technical field of a complete set of equipment designed for feeding or clarifying cooling liquid on a grinding machine. Background Art

[0002] The production process for steel balls includes a hard grinding step, where, after quenching, the steel balls are ground with a ceramic grinding wheel. This process consumes a large amount of circulating water. The main impurities in this circulating water are iron powder and grinding wheel dust. If these impurities are not removed promptly, they can be carried into the grinding area, scratching the steel balls and affecting their quality. They can also block the micropores in the grinding wheel's structure, resulting in poor chip retention and significantly reducing grinding efficiency. Therefore, each grinder is equipped with a large water tank, primarily to allow impurities to settle. However, after a few days of use, a large amount of sludge accumulates at the bottom of the tank, necessitating manual cleaning of the machine. Each cleaning process can easily exceed 100 kilograms, which is time-consuming and labor-intensive. Since a workshop typically has multiple grinders, the water tanks of each grinder need to be cleaned almost daily, which is very labor-intensive. Furthermore, the sludge's high water content makes it difficult to sell later and can easily leak into the environment, significantly impacting the environment.

[0003] In this regard, the Chinese utility model patent with authorization announcement number CN204382094U discloses a grinding fluid recycling and filter residue automatic separation and collection device. The separation and collection device includes a sedimentation tank, a separator, a waste residue bucket, an elevator, a waste residue recovery pipe and a waste residue tank. The grinding fluid after use in the grinder is first transported to the separator through a discharge pipe. The separator is located above the sedimentation tank. The grinding fluid separated by the separator enters the sedimentation tank. The separated waste residue reaches the waste residue bucket through a conveyor belt. The elevator then lifts the waste residue bucket to the waste residue recovery pipe. The waste residue is poured into the recovery pipe and transported to the waste residue tank through the recovery pipe. The grinding fluid entering the sedimentation tank is pumped away by a water pump after three stages of sedimentation and then transported to each grinding machine through a pipeline for use.

[0004] The above-mentioned separation and collection device enables the grinding fluid after use of multiple grinding machines to enter the same sedimentation tank. Since the grinding fluid first undergoes solid-liquid separation before entering the sedimentation tank, this device is only suitable for application scenarios where the amount of slag carried by the grinding fluid is very large and the particle size is also relatively large. As for the steel ball hard grinding process, the grinding amount of the steel ball is very small, and the amount of impurities carried in the circulating water is not much. If the above-mentioned method is adopted, the separator will always be in working condition, but it will not be able to separate much waste slag for a long time, resulting in a waste of energy. At the same time, the impurity particles generated by the steel ball hard grinding process are relatively small, and some impurities will directly pass through the separator into the sedimentation tank. After long-term use, a large amount of sludge accumulates at the bottom of the sedimentation tank, and it is still necessary to stop the machine for manual cleaning, which is time-consuming and labor-intensive, affecting production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a circulating water treatment system for a steel ball hard grinding process, so as to solve the problem that when the separation and collection device in the prior art is applied to the steel ball hard grinding process, energy will be wasted and some impurities will pass through the separator and enter the sedimentation tank. After long-term use, a large amount of sludge will accumulate at the bottom of the sedimentation tank, and it is still necessary to stop the machine for manual cleaning, which is time-consuming and labor-intensive, and affects production efficiency.

[0006] To achieve the above objectives, the circulating water treatment system for the steel ball hard grinding process in the present invention adopts the following technical solutions:

[0007] The circulating water treatment system of the steel ball hard grinding process includes a circulating sedimentation tank, at least two grinding machines, a discharge pipe, a suction pipe, a sewage pipe and a solid-liquid separator; the discharge pipe directly discharges the circulating water used by each grinding machine into the circulating sedimentation tank, so that the impurities in the circulating water can settle automatically in the circulating sedimentation tank; the suction pipe extends into the upper part of the circulating sedimentation tank and is provided with a suction pump for extracting the upper layer of clear water in the circulating sedimentation tank and supplying it to each grinding machine; the sewage pipe extends into the bottom of the circulating sedimentation tank and is provided with a sewage pump for extracting the sludge accumulated in the circulating sedimentation tank for a period of time directly into the solid-liquid separator for separation or first extracting it to a temporary sedimentation tank and then separating it through the solid-liquid separator.

[0008] The beneficial effect of the above technical solution is that: the utility model belongs to the invention creation of changing the relationship between elements, which mainly changes the setting position of the solid-liquid separator. In the utility model, the circulating water after use of each grinding machine is directly discharged into the circulating sedimentation tank through the drain pipe, so that the impurities in the circulating water are precipitated in the circulating sedimentation tank by themselves. This is because the impurities generated by the steel ball hard grinding process have a certain specific gravity and can be precipitated by themselves, and there is no need to use a machine for separation. The suction pipe can extract the upper layer of clear water in the circulating sedimentation tank and supply it to each grinding machine for use. This is the same as the large water tank equipped for each grinding machine in the prior art. After a period of use, a certain amount of sludge will accumulate in the circulating sedimentation tank. At this time, the sludge is directly extracted into the solid-liquid separator for separation through the sewage extraction pipe or first extracted into a temporary sedimentation tank and then separated by the solid-liquid separator. In this way, the solid-liquid separator does not need to be in working state all the time, which can save energy consumption. Moreover, a certain amount of sludge is accumulated before it is extracted for solid-liquid separation, which can improve the working efficiency of the solid-liquid separator. At the same time, as long as a certain amount of sludge accumulates in the circulating sedimentation tank, it can be pumped out through the sewage pipe without stopping the machine for manual cleaning, which greatly reduces the intensity of manual labor and does not affect production efficiency.

[0009] Furthermore, the circulating water treatment system of the steel ball hard grinding process includes a temporary sedimentation tank with a volume smaller than the circulating sedimentation tank, a suction pipe and a suction pump arranged on the suction pipe. The suction pipe extends into the bottom of the temporary sedimentation tank and is used to extract the sludge precipitated in the temporary sedimentation tank into the solid-liquid separator for separation.

[0010] Furthermore, the liquid outlet of the solid-liquid separator is connected to a return pipe, which is connected to a temporary sedimentation tank so that the liquid separated by the solid-liquid separator can flow back to the temporary sedimentation tank.

[0011] Furthermore, the sewage pump is a bidirectional pump, which first pumps the upper layer of clear water in the temporary sedimentation tank into the circulating sedimentation tank, and then pumps the sludge at the bottom of the circulating sedimentation tank into the temporary sedimentation tank.

[0012] Furthermore, the circulating water treatment system of the steel ball hard grinding process also includes a liquid extraction pipe, which extends into the upper part of the temporary sedimentation tank and is provided with a liquid extraction pump to extract the upper layer of clear water in the temporary sedimentation tank into the circulating sedimentation tank before the sewage pipe extracts the sludge at the bottom of the circulating sedimentation tank into the temporary sedimentation tank.

[0013] Furthermore, a clean water outlet is provided on the upper part of the temporary sedimentation tank, and the clean water outlet is located directly above the circulating sedimentation tank, so that the upper clean water in the temporary sedimentation tank can flow into the circulating sedimentation tank when the clean water outlet is opened.

[0014] Furthermore, the circulating sedimentation tank is arranged below the ground, and the temporary sedimentation tank is arranged above the ground.

[0015] Furthermore, one end of the sewage suction pipe extending into the circulating sedimentation tank can move freely, so as to suck out the sludge at various places on the bottom of the circulating sedimentation tank under manual control.

[0016] Furthermore, the position where the discharge pipe is connected to the circulating sedimentation tank is located at one end of the circulating sedimentation tank in the length direction, and the position where the suction pipe extends into the circulating sedimentation tank is located at the other end of the circulating sedimentation tank in the length direction.

[0017] Furthermore, the solid-liquid separator is a centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the circulating water treatment system for the steel ball hard grinding process in the present invention.

[0019] In the figure: 1. Circulating sedimentation tank; 2. Grinder; 3. Discharge pipe; 4. Suction pipe; 5. Suction pump; 6. Booster tank; 7. Temporary sedimentation tank; 8. Sewage pipe; 9. Sewage pump; 10. Solid-liquid separator; 11. Suction pipe; 12. Suction pump; 13. Return pipe. DETAILED DESCRIPTION

[0020] In response to the technical problems existing in the prior art, the basic idea of ​​the present invention is to allow the circulating water after use of each grinding machine to be directly discharged into the circulating sedimentation tank for self-precipitation. When the sludge accumulated in the circulating sedimentation tank reaches a certain amount, the sludge is directly pumped out through the sewage pipe into the solid-liquid separator for separation, or it is first pumped out to a temporary sedimentation tank and then separated through the solid-liquid separator. The solid-liquid separator does not need to work all the time, and the sludge in the circulating sedimentation tank does not need to be manually cleaned.

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] Example 1 of the circulating water treatment system for the steel ball hard grinding process in the utility model:

[0023] like Figure 1 As shown, the circulating water treatment system of the steel ball hard grinding process includes a circulating sedimentation tank 1, at least two grinding machines 2, a discharge pipe 3, a suction pipe 4, a suction pump 5, a booster tank 6, a temporary sedimentation tank 7, a sewage pipe 8, a sewage pump 9, a solid-liquid separator 10, a suction pipe 11, a suction pump 12 and a return pipe 13.

[0024] There are four grinders 2 in this embodiment, and in other embodiments, there may be two, three, five, six or more grinders 2. The circulating water outlet of each grinder 2 is connected to the drain pipe 3. The circulating water after use by each grinder 2 is directly discharged into the same circulating sedimentation tank 1 through the drain pipe 3, so that the impurities in the circulating water can be precipitated in the circulating sedimentation tank 1. The circulating sedimentation tank 1 is set below the ground, and its volume can meet the circulating water discharge of each grinder 2 in the workshop, the precipitation of impurities in the circulating water, and provide relatively clean circulating water for each grinder 2. This method is based on the same principle as the prior art in which each grinder is equipped with a large water tank. The reason is that the impurities generated by the steel ball hard grinding process have a certain specific gravity and can be precipitated by themselves, without the need for separation by machines.

[0025] The liquid suction pump 5 is arranged on the liquid suction pipe 4, and the liquid suction pipe 4 extends into the upper part of the circulating sedimentation tank 1, and is used to extract the upper layer of clean water in the circulating sedimentation tank 1 and supply it to each grinding machine 2. In addition, the position where the discharge pipe 3 is connected to the circulating sedimentation tank 1 is located at one end of the circulating sedimentation tank 1 in the length direction, and the position where the liquid suction pipe 4 extends into the circulating sedimentation tank 1 is located at the other end of the circulating sedimentation tank 1 in the length direction. Due to the length of the circulating sedimentation tank 1, the circulating water entering therein is fully precipitated, ensuring that the circulating water extracted by the liquid suction pipe 4 is relatively clean, avoiding excessive impurities causing scratches on the surface of the steel balls, thereby affecting the quality of the steel balls, and at the same time avoiding excessive impurities causing the micropores in the grinding wheel structure to be blocked, thereby resulting in poor chip holding effect and affecting grinding efficiency.

[0026] The booster tank 6 is connected to the suction pipe 4 and is located between the suction pump 5 and each grinding machine 2. When multiple grinding machines 2 are turned on at the same time, the pressure of the circulating water can be guaranteed to ensure the grinding effect.

[0027] The temporary sedimentation tank 7 is set above the ground, and its volume is smaller than that of the circulating sedimentation tank 1. A sewage pump 8 connects the temporary sedimentation tank 7 and the circulating sedimentation tank 1. One end of the sewage pump 8 extends into the bottom of the circulating sedimentation tank 1, and the other end extends into the upper part of the temporary sedimentation tank 7. A sewage pump 9 is set on the sewage pump 8, which can pump the sludge accumulated in the circulating sedimentation tank 1 for a period of time into the temporary sedimentation tank 7. This process can be carried out after each grinding machine 2 is shut down every day, at which time the circulating sedimentation tank 1 has accumulated impurities for a day. The sludge pumped into the temporary sedimentation tank 7 contains a large amount of water. After settling overnight, before the grinding machines 2 are started the next morning, the upper clean water in the temporary sedimentation tank 7 is first pumped back to the circulating sedimentation tank 1, and then the sludge obtained after settling overnight in the circulating sedimentation tank 1 is pumped out to the temporary sedimentation tank 7. This can ensure that there is no sludge in the circulating sedimentation tank 1 to the greatest extent, and ensure that the circulating water after use by each grinding machine 2 the next day can be better precipitated in the circulating sedimentation tank 1, and at the same time, the pipette 4 can pump out cleaner circulating water.

[0028] In this embodiment, the sewage pump 9 is a bidirectional pump. Therefore, using the same sewage pump 9 and sewage pipe 8, it is possible to first pump the upper layer of clear water from the temporary sedimentation tank 7 into the circulating sedimentation tank 1, and then pump the sludge at the bottom of the circulating sedimentation tank 1 into the temporary sedimentation tank 7, thereby saving equipment costs. It should be noted that because impurities generated during the steel ball grinding process have a certain specific gravity, by controlling the power of the sewage pump 9, the upper layer of clear water from the temporary sedimentation tank 7 can be prevented from muddying the sludge at the bottom of the circulating sedimentation tank 1 when entering the circulating sedimentation tank 1. Furthermore, the end of the sewage pipe 8 that extends into the circulating sedimentation tank 1 is freely movable, allowing it to be manually lifted upward to avoid muddying the sludge at the bottom of the circulating sedimentation tank 1. Furthermore, when pumping the sludge from the bottom of the circulating sedimentation tank 1 into the temporary sedimentation tank 7, the position of the sewage pipe 8 can be manually controlled to completely remove the sludge from all areas of the bottom of the circulating sedimentation tank 1, providing greater flexibility and improved sewage extraction efficiency.

[0029] A suction pipe 11 connects the solid-liquid separator 10 and the temporary sedimentation tank 7. A suction pump 12 is provided on the suction pipe 11. One end of the suction pipe 11 extends into the bottom of the temporary sedimentation tank 7. Every morning, when the sludge at the bottom of the circulating sedimentation tank 1 is pumped into the temporary sedimentation tank 7, the sludge in the temporary sedimentation tank 7 can be pumped out into the solid-liquid separator 10 through the suction pipe 11 for solid-liquid separation. Finally, relatively dry sludge can be obtained, which is convenient for subsequent sale. The sludge will not leak sewage out, thereby avoiding adverse effects on the environment.

[0030] In addition, the liquid outlet of the solid-liquid separator 10 is connected to a return pipe 13, which is connected to the temporary sedimentation tank 7, so that the liquid separated by the solid-liquid separator 10 can flow back to the temporary sedimentation tank 7, and then through repeated suction by the suction pipe 11 and repeated separation by the solid-liquid separator 10, when the liquid entering the temporary sedimentation tank 7 is clear enough, it means that the impurities are fully separated by the solid-liquid separator 10, and the solid-liquid separator 10 can discharge mud. At the same time, the liquid flowing back into the temporary sedimentation tank 7 will be sucked into the circulating sedimentation tank 1 for continued use, thereby greatly saving hard grinding fluid and saving production costs.

[0031] In this embodiment, the solid-liquid separator 10 is a centrifuge, which has a better separation effect.

[0032] The working process of the circulating water treatment system of the steel ball hard grinding process of this utility model is as follows:

[0033] At the end of each day's work, after each grinding machine 2 is shut down, the sludge at the bottom of the circulating sedimentation tank 1 is pumped out to the temporary sedimentation tank 7 through the sewage pipe 8. After settling overnight, the next morning, the upper layer of clear water in the temporary sedimentation tank 7 is first pumped out to the circulating sedimentation tank 1, and then the sludge at the bottom of the circulating sedimentation tank 1 is pumped out to the temporary sedimentation tank 7. After that, each grinding machine 2 can operate normally. The circulating water used by each grinding machine 2 is directly discharged into the circulating sedimentation tank 1 through the drainage pipe 3 to settle on its own. The suction pipe 4 extracts the upper layer of clear water from the circulating sedimentation tank 1 and supplies it to each grinding machine 2. The sludge pumped into the temporary sedimentation tank 7 is pumped into the solid-liquid separator 10 (centrifuge) through the suction pipe 11 for drying. The return water from the centrifuge enters the temporary sedimentation tank 7 through the return pipe 13. After working continuously for about three hours, the centrifuge is shut down after the return water gradually becomes clear, and the centrifuge can then discharge the sludge.

[0034] By adopting the circulating water treatment system of the steel ball hard grinding process of the present invention, as long as a certain amount of sludge accumulates in the circulating sedimentation tank 1, it can be pumped out to the temporary sedimentation tank 7 through the sewage pumping pipe 8, and finally separated by the solid-liquid separator 10, without having to stop the machine for manual cleaning, which greatly reduces the labor intensity. In addition, the solid-liquid separator 10 does not affect the normal recycling of circulating water during operation, ensuring that production efficiency is not affected. Compared with the existing technology, the solid-liquid separator 10 in the present invention does not need to be in a working state all the time, which can save energy consumption, and the sludge is not pumped out for solid-liquid separation until a certain amount of sludge is accumulated, which can improve the working efficiency of the solid-liquid separator 10.

[0035] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: the solid-liquid separator may also be a suction filter or a filter press.

[0036] In other embodiments of the circulating water treatment system for the steel ball hard grinding process, the position where the liquid suction pipe extends into the circulating sedimentation tank can also be closer to the middle of the circulating sedimentation tank.

[0037] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: one end of the sewage suction pipe extending into the circulating sedimentation tank can be fixed and immovable. At this time, the sewage suction pipe can be arranged to include multiple branch pipes, and the multiple branch pipes are merged into one pipe and then connected to the sewage pump. Each branch pipe is set at a fixed point to ensure that the sludge at the bottom of the circulating sedimentation tank can be sucked clean.

[0038] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: a temporary sedimentation tank can also be set below the ground, and of course the circulating sedimentation tank can also be set above the ground. In this case, a drainage pump needs to be installed on the drainage pipe.

[0039] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: the sewage pump is a one-way pump. In this case, the circulating water treatment system also includes a liquid suction pipe arranged independently of the sewage suction pipe. The liquid suction pipe extends into the upper part of the temporary sedimentation tank and is provided with a liquid suction pump to pump out the upper clear water in the temporary sedimentation tank into the circulating sedimentation tank before the sewage suction pipe pumps out the sludge at the bottom of the circulating sedimentation tank into the temporary sedimentation tank.

[0040] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: the sewage pump is a one-way pump, and a liquid suction pipe and a liquid suction pump are no longer provided. At this time, a clean water outlet can be provided at the upper part of the temporary sedimentation tank so that the clean water outlet is located directly above the circulating sedimentation tank, or the entire temporary sedimentation tank is located directly above the circulating sedimentation tank, so that when the clean water outlet is opened, the upper clean water in the temporary sedimentation tank can flow into the circulating sedimentation tank by itself.

[0041] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: when the single separation effect of the solid-liquid separator is relatively good, the liquid discharged from the liquid outlet can be directly discharged into the circulating sedimentation tank and no longer flows back to the temporary sedimentation tank through the return pipe.

[0042] In other embodiments of the circulating water treatment system for the steel ball hard grinding process: the circulating water treatment system for the steel ball hard grinding process does not include a temporary sedimentation tank, a suction pipe and a suction pump. At this time, the sewage pipe directly draws out the sludge accumulated in the circulating sedimentation tank for a period of time into the solid-liquid separator for separation. Depending on the separation effect, the liquid produced by the separation can be directly discharged into the circulating sedimentation tank or discharged as waste liquid.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. The circulating water treatment system for the steel ball hard grinding process is characterized by: It includes a circulating sedimentation tank, at least two grinding machines, a discharge pipe, a suction pipe, a sewage pipe and a solid-liquid separator; the discharge pipe is used to discharge the circulating water used by each grinding machine directly into the circulating sedimentation tank, so that the impurities in the circulating water can settle automatically in the circulating sedimentation tank; the suction pipe extends into the upper part of the circulating sedimentation tank and is provided with a suction pump for extracting the upper layer of clear water in the circulating sedimentation tank and supplying it to each grinding machine; the sewage pipe extends into the bottom of the circulating sedimentation tank and is provided with a sewage pump for extracting the sludge accumulated in the circulating sedimentation tank for a period of time directly into the solid-liquid separator for separation or first extracting it to a temporary sedimentation tank and then separating it through the solid-liquid separator.

2. The steel ball hard grinding process circulating water treatment system according to claim 1, characterized in that: The circulating water treatment system of the steel ball hard grinding process includes a temporary sedimentation tank with a volume smaller than the circulating sedimentation tank, a suction pipe and a suction pump arranged on the suction pipe. The suction pipe extends into the bottom of the temporary sedimentation tank and is used to extract the sludge precipitated in the temporary sedimentation tank into the solid-liquid separator for separation.

3. The steel ball hard grinding process circulating water treatment system according to claim 2, characterized in that: The liquid outlet of the solid-liquid separator is connected to a return pipe, which is connected to a temporary sedimentation tank so that the liquid separated by the solid-liquid separator can flow back to the temporary sedimentation tank.

4. The circulating water treatment system for the steel ball hard grinding process according to claim 3, characterized in that: The sewage pump is a bidirectional pump, which first pumps the upper clear water in the temporary sedimentation tank into the circulating sedimentation tank, and then pumps the sludge at the bottom of the circulating sedimentation tank into the temporary sedimentation tank.

5. The steel ball hard grinding process circulating water treatment system according to claim 3, characterized in that: The circulating water treatment system of the steel ball hard grinding process also includes a liquid extraction pipe, which extends into the upper part of the temporary sedimentation tank and is provided with a liquid extraction pump to extract the upper layer of clear water in the temporary sedimentation tank into the circulating sedimentation tank before the sewage pipe extracts the sludge at the bottom of the circulating sedimentation tank into the temporary sedimentation tank.

6. The steel ball hard grinding process circulating water treatment system according to claim 3, characterized in that: A clean water outlet is provided on the upper part of the temporary sedimentation tank, and the clean water outlet is located just above the circulating sedimentation tank, so that when the clean water outlet is opened, the upper clean water in the temporary sedimentation tank can flow into the circulating sedimentation tank.

7. The circulating water treatment system for the steel ball hard grinding process according to any one of claims 2 to 6, characterized in that: The circulating sedimentation tank is set below the ground, and the temporary sedimentation tank is set above the ground.

8. The circulating water treatment system for a steel ball hard grinding process according to any one of claims 1 to 6, characterized in that: One end of the sewage suction pipe extending into the circulating sedimentation tank can move freely so as to suck out the sludge from various places at the bottom of the circulating sedimentation tank under manual control.

9. The circulating water treatment system for a steel ball hard grinding process according to any one of claims 1 to 6, characterized in that: The position where the discharge pipe is connected to the circulating sedimentation tank is located at one end of the circulating sedimentation tank in the length direction, and the position where the suction pipe extends into the circulating sedimentation tank is located at the other end of the circulating sedimentation tank in the length direction.

10. The steel ball hard grinding process circulating water treatment system according to any one of claims 1 to 6, characterized in that: The solid-liquid separator is a centrifuge.

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