A circulating slurry device and slurry method suitable for fine particles
By employing a dual-chamber structure and negative pressure circulation design, the problem of poor mixing in traditional flotation slurry conditioning equipment has been solved, achieving efficient slurry conditioning and feed adaptability while reducing equipment size.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PINGMEI SHENMA ENERGY & CHEM GRP CO LTD
- Filing Date
- 2023-12-26
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional flotation slurry conditioning equipment suffers from poor slurry mixing when processing fine-grained, low-grade coal and ore, making it difficult to achieve efficient slurry conditioning. Furthermore, the increased size and height of the equipment make it difficult to adapt to changes in feed conditions.
It adopts a dual-chamber structure, with alternating impellers and slurry shearing discs on the stirring shaft, combined with stator and false bottom design, to form a negative pressure circulation, realize multiple stirring and circulation of slurry, and enhance the mixing effect.
It improves the mixing degree and slurry conditioning effect of the slurry, reduces the height and volume of the equipment, and enhances the adaptability to changes in feed rate.
Smart Images
Figure CN117563787B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of slurry preparation system technology, and in particular to a circulating slurry preparation device and method suitable for fine-grained minerals. Background Technology
[0002] Flotation is the most economical and effective separation method for coal and mineral resources, making significant contributions to the large-scale recovery of valuable resources in fine-grained, low-grade coal and ore. With the rapid development of mechanized mining and heavy media separation technology, coal slime in my country exhibits characteristics such as finer particles, higher ash content, and greater intergrowth content, leading to increased difficulty in its separation. As coal quality conditions change and users demand higher quality clean coal, the contradiction between flotation recovery rate and clean coal quality becomes more prominent, thus placing higher demands on coal slime separation equipment.
[0003] Slurry conditioning is a crucial step in the flotation process and the foundation for precise mineral separation. Its main purpose is to remove fine slime from the surface of mineral particles, improve the dispersion, collision, and adsorption of reagents and mineral particles, and increase the hydrophilicity / hydrophobicity differences between different mineral particles, thus making the separation process more efficient. Traditional flotation slurry conditioning equipment is limited by its internal stirring structure, resulting in weak slurry mixing and poor adaptability to coal slime feed conditions, making it difficult to achieve good slurry conditioning effects and exacerbating the difficulty of subsequent flotation operations. Therefore, it is urgent to enhance the mineral slurry conditioning process through technological innovation, which is of great significance for efficient coal flotation. To achieve better slurry conditioning effects, most currently developed high-efficiency slurry conditioning equipment increases the number of impellers to improve the degree of slurry mixing, but this also increases the height and volume of the slurry conditioning equipment. Therefore, developing a circulating slurry conditioning device suitable for fine-grained minerals is extremely necessary. Summary of the Invention
[0004] Based on the above analysis, this invention proposes a circulating slurry preparation device and method suitable for fine-grained minerals. It has a simple structure, is easy to use, and has a small size. It can achieve the mixing effect that requires multiple mixing chambers with only two mixing chambers, effectively improving the problem of insufficient self-circulation capacity of existing slurry preparation devices.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0006] A circulating slurry preparation device suitable for fine-grained minerals includes a stirring cylinder, a stirring device extending vertically into the stirring cylinder from the top of the stirring cylinder, and a stirring shaft in the shape of a cantilever, on which a stirring and shearing component and a slurry circulation component are provided.
[0007] The mixing drum is equipped with a mixing baffle that divides its interior into upper and lower chambers. The center of the mixing baffle has an opening that allows the mixing shaft to pass through. The mixing baffle is also equipped with multiple circulation holes. The lower side wall of the mixing drum is equipped with a slurry inlet that communicates with the lower chamber. The upper side wall of the slurry inlet is equipped with a discharge outlet that communicates with the upper chamber. A dosing device that communicates with the lower chamber is located axially symmetrical to the slurry inlet.
[0008] The mixing and shearing assembly includes a mixing impeller and a slurry shearing disc mounted on a mixing shaft. The mixing impeller and the slurry shearing disc are arranged horizontally alternately. There are two sets of mixing impellers, which are respectively mounted in the upper and lower chambers of the mixing cylinder via the mixing shaft, forming two mixing zones in the upper and lower chambers. The slurry shearing disc is located between the upper and lower mixing impellers and is flush with the opening of the mixing baffle. The mixing impeller and the slurry shearing disc provide strong mixing and shearing of the slurry.
[0009] The slurry circulation component includes a stator with an open bottom. The stator has an umbrella-shaped cover structure, and the stator encloses the lower stirring impeller to form a wheel cavity. The top surface of the stator has multiple circulation holes for circulating the slurry in the lower chamber back into the wheel cavity for agitation. Multiple circulation holes on the stirring baffle are connected to the side of the stator through circulation pipes, so that the slurry in the upper chamber circulates back into the wheel cavity under the negative pressure in the wheel cavity. Multiple stator guide plates are evenly spaced around the lower side of the stator, and multiple slurry outlets are provided on the side wall of the stator between the stator guide plates. A false bottom is provided below the stator, and a slurry suction port is provided at the center of the false bottom.
[0010] The negative pressure created by the rotating impeller in the impeller cavity causes the slurry in the lower chamber to be drawn into the impeller cavity through the opening at the bottom of the stator. At the same time, the slurry subjected to the shearing action of the rotating slurry shearing disc is also drawn into the impeller cavity through the circulation hole on the top surface of the stator. The slurry in the upper chamber is circulated into the impeller cavity through the circulation pipe for continued mixing. This allows the mixing drum to achieve an effect far exceeding that of two-zone mixing with only two mixing zones. By using the method of slurry flow through the stator and the peripheral material flow, the adaptability of the slurry conditioning device to changes in feed rate and the slurry circulation effect are improved, the slurry circulation in the mixing drum is improved, the degree of slurry mixing is increased, and the slurry conditioning effect is enhanced.
[0011] Furthermore, the dosing device includes a dosing pipe, to which a dosing tank is connected via a pipeline, and a valve is installed on the pipeline.
[0012] Furthermore, the top of the mixing cylinder is equipped with a lid, and the lid is equipped with an electric drive device that provides power to the mixing shaft. The electric drive device is connected to the end of the mixing shaft via a coupling.
[0013] Furthermore, the slurry shearing disc and the mixing baffle are at the same horizontal height, and in order to prevent relatively coarse particles in the slurry from getting stuck in the mixing impeller, the sides of the slurry shearing disc and the mixing baffle are left with a gap for coarser particles in the slurry to pass through. The gap width should be greater than the particle size of the largest particle that may exist in the slurry.
[0014] Furthermore, the top of the stator's umbrella-shaped cover structure is a horizontal frustum, with 6 circulation holes on the top surface of the horizontal frustum, and downward-sloping umbrella-shaped side surfaces around the cylindrical surface. The funnel side surface has 16 circulation holes. The stator (14) has a columnar structure on the side wall with stator guide plates. Multiple slurry outlets are provided on the stator side wall between multiple stator guide plates, so that the sucked-in slurry can be discharged to form a circulation. The slurry that is still not properly mixed in the upper part of the stirring baffle is re-entered into the mixing zone through the circulation pipe for further mixing, thereby enhancing the mixing effect.
[0015] Furthermore, there are 16 stator guide plates, which are set at a 60° angle to the radial direction. The tilting direction of the stator guide plates is consistent with the rotation direction of the impeller, so as to reduce the swirling eddies of slurry formed around the impeller when it throws out the slurry, and improve the mixing degree of the slurry.
[0016] Furthermore, a false bottom is provided at the bottom of the mixing drum body by a fixed block. The false bottom fits right at the lower opening of the stator. A slurry suction port is provided at the center of the false bottom. Multiple stator guide plates arranged at equal intervals around the circumference of the stator are connected and fixed to the false bottom. This realizes the slurry passage method of suction from the false bottom and material flow around the perimeter, which improves the adaptability to changes in the slurry feed rate and the slurry circulation effect.
[0017] A slurry preparation method for a circulating slurry preparation device suitable for fine-grained minerals involves an electrically driven agitator rotating a stirring shaft. Slurry enters through the inlet, while a valve in the dosing tank is simultaneously controlled to add slurry through a dosing pipe. The impellers in the upper and lower chambers rotate, creating a negative pressure within the stator. The slurry enters the wheel cavity formed within the stator through the suction port at the false bottom and the circulation hole on the top surface of the stator. Under the action of the impellers within the stator, the slurry is strongly stirred and dispersed. The dispersed slurry exits from the side outlet between the guide plates on the side of the stator and gradually rises. Upon reaching the slurry shear plate, some slurry returns to the wheel cavity through the circulation hole on the top surface of the stator for further stirring. Some slurry enters the upper chamber through the gap between the shear plate and the stirring baffle. The slurry in the upper chamber continues to be stirred by the rotating impeller within the upper chamber. Some slurry in the upper chamber is then drawn back into the wheel cavity through the circulation hole of the stirring baffle along the circulation pipe for further circulation and stirring, thus enhancing the slurry preparation effect. After multiple stirring and slurry preparations, a portion of the slurry is discharged from the outlet.
[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0019] (1) In the slurry preparation device of the present invention, circulation holes are respectively opened on the cylindrical and conical surfaces of the stator, and the number of circulation holes on the conical surface is the same as the number of circulation holes on the stirring baffle. The circulation holes are connected by circulation pipes to form a passage. When the impeller rotates, the negative pressure generated in the impeller cavity causes the slurry in the lower region of the stirring baffle to enter the mixing zone through the circulation holes on the cylindrical surface, while the slurry in the upper region of the stirring baffle that is still not properly prepared is re-entered into the mixing zone through the circulation pipe for further preparation and mixing, thereby enhancing the slurry preparation effect.
[0020] (2) The slurry mixing device of the present invention has a stator guide plate at the lower end of the stator cone surface at an angle of 60° to the radial direction. The tilting direction is consistent with the impeller rotation direction, which can reduce the slurry rotation vortex formed around the impeller when it throws out the slurry and improve the degree of slurry mixing.
[0021] (3) The slurry preparation device of the present invention has a ring-shaped false bottom with a slurry suction port in the center, which is directly opposite the stirring shaft. When the impeller rotates, the negative pressure formed in the impeller cavity causes the slurry under the false bottom to enter the mixing zone through the slurry suction port. Therefore, the slurry preparation device can realize the slurry passage method of suction under the false bottom and material flow around the periphery, which improves the adaptability of the slurry preparation device to changes in feed amount and the slurry circulation effect.
[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be understood through specific embodiments of the invention. The objectives and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description
[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.
[0024] Figure 1 This is a schematic diagram of the structure of a circulating slurry preparation device suitable for fine-grained minerals in an embodiment of the present invention.
[0025] Attached reference numerals: 1-Agitator body; 2-Tank cover; 3-Inlet; 4-Outlet; 5-Dosing pipe; 6-Dosing box; 7-Valve; 8-Agitator baffle; 9-Circulation hole; 10-Agitator shaft; 11-Coupling; 12-Agitator impeller; 13-Slurry shearing disc; 14-Stator; 15-Stator guide plate; 16-Circulation pipe; 17-False bottom; 18-Fixing block. Detailed Implementation
[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.
[0027] A specific embodiment of the present invention, such as Figure 1 As shown, a circulating slurry preparation device suitable for fine-grained minerals is disclosed, including a stirring tank 1, a stirring transmission mechanism, a stirring shearing component, and a slurry circulation component; the stirring transmission mechanism is located in the center of the stirring tank 1, and the stirring shearing component and the slurry circulation component are both mounted on the stirring transmission mechanism.
[0028] Compared with the prior art, the fine-grained mineral circulating slurry conditioning device provided in this embodiment improves the slurry circulation in the mixing tank, increases the degree of slurry mixing, and enhances the slurry conditioning effect by setting up a slurry circulation component. Due to the negative pressure formed in the impeller cavity when the impeller rotates, the slurry re-enters the mixing zone through the circulation hole and circulation pipe for slurry conditioning and mixing. The slurry passage method of pseudo bottom suction and peripheral material flow improves the adaptability of the slurry conditioning device to changes in feed rate and the slurry circulation effect.
[0029] In this embodiment, in order to prevent the slurry in the mixing tank 1 from overflowing and to support the electric drive device, a tank cover 2 is provided on the top of the mixing tank.
[0030] To facilitate the transport of slurry and reagents, the mixing tank 1 includes a slurry inlet 3, a discharge outlet 4, and a dosing device. Specifically, the slurry inlet 3, the discharge outlet 4, and the dosing device are respectively located on both sides of the mixing tank.
[0031] In this embodiment, the slurry inlet 3 is close to the bottom of the mixing tank 1, and the slurry outlet 4 is located on the upper part of the cylindrical surface of the mixing tank 1, near the tank cover 2, and both are connected to the slurry pipeline.
[0032] In this embodiment, the dosing device includes a dosing pipe 5, a dosing tank 6, and a valve 7. The dosing pipe 5 is connected to the dosing tank 6 through a pipeline and the valve 7. Specifically, the dosing pipe 5 is a Venturi tube that can realize a shear jet of the agent, including an inlet end, a diffuser end, and a dosing port.
[0033] In order to make the slurry preparation in each area of the mixing tank relatively independent, a mixing baffle 8 is provided on the inner wall of the mixing tank 1. The mixing baffle 8 is circular and horizontally arranged, and multiple circulation holes 9 are opened on the mixing baffle 8. In this embodiment, 16 circulation holes are opened on the mixing baffle 8.
[0034] In this embodiment, the stirring transmission mechanism includes a stirring shaft 10 and a driving device. The top end of the stirring shaft 10 passes through the bucket cover 2 and is connected to the driving device on the bucket cover 2 via a coupling 11. The driving device provides power for its operation. The bottom end extends to the lower part of the stirring bucket body 1 and is cantilevered.
[0035] To ensure thorough mixing of the slurry and achieve better slurry conditioning, a mixing and shearing assembly is provided on the mixing shaft, including two mixing impellers 12 (upper and lower) and a slurry shearing disc 13. The slurry shearing disc 13 is positioned between the two mixing impellers 12, and the mixing impellers 12 and the slurry shearing disc 13 provide strong mixing and shearing of the slurry. Specifically, the mixing impellers 12 and the shearing disc 13 are arranged horizontally alternately, with the mixing impellers 12 positioned at the bottom and upper-middle parts of the mixing shaft 10, respectively, separated by a mixing baffle 8 and the slurry shearing disc 13. In this embodiment, the mixing shaft 10 is equipped with two mixing impellers 12 and one shearing disc 13.
[0036] In this embodiment, the slurry shearing disk 13 and the stirring baffle 8 are at the same horizontal height, and in order to prevent relatively coarse particles in the slurry from getting stuck in the stirring impeller 12, a certain gap is left between the slurry shearing disk 13 and the stirring baffle 8 for the passage of coarser particles in the slurry.
[0037] In order to circulate the slurry in the mixing tank 1, the slurry preparation device is equipped with a slurry circulation component, which includes a stator 14, a circulation pipe 16 and a false bottom 17. The stator 14 is installed on the mixing shaft 10 and is located above the mixing impeller 12 at the bottom end of the mixing shaft.
[0038] The stator 14 has an umbrella-like shape and consists of a cylindrical surface and a conical surface. Both the cylindrical and conical surfaces of the stator 14 have circulation holes 9, with the number of circulation holes on the conical surface being the same as the number of circulation holes on the stirring baffle 8. The circulation holes 9 are connected by circulation pipes 16 to form a passage. The negative pressure created in the impeller cavity when the impeller 12 rotates causes the slurry in the lower region of the stirring baffle 8 to enter the mixing zone through the circulation holes 9 on the cylindrical surface. Meanwhile, the slurry in the upper region of the stirring baffle 8 that is still not properly mixed re-enters the mixing zone through the circulation pipes 16 for further mixing, thus enhancing the mixing effect. In this embodiment, the stator 14 has 6 circulation holes 9 on its cylindrical surface and 16 circulation holes 9 on its conical surface.
[0039] In this embodiment, the lower end of the stator 14 cone surface is provided with 16 stator guide plates 15 at an angle of 60° to the radial direction. The tilting direction is consistent with the rotation direction of the impeller 12, which can reduce the slurry rotation vortex formed around the impeller 12 when it throws out the slurry and improve the degree of slurry mixing. The lower end of the stator guide plate 15 is fixed on the false bottom 17.
[0040] In this embodiment, the false bottom 17 is annular in shape, with a suction port in the center, directly facing the stirring shaft 10. When the impeller 12 rotates, the negative pressure formed in the impeller cavity causes the slurry under the false bottom 17 to enter the mixing zone through the suction port. Therefore, the slurry conditioning device can realize the slurry passage method of suction from the false bottom and material flow around the periphery, which improves the adaptability of the slurry conditioning device to changes in feed rate and the slurry circulation effect. The false bottom 17 is fixed to the bottom of the mixing tank by the fixing block 18.
[0041] In this embodiment, the slurry enters through the feed inlet 3 and enters the mixing zone through the suction from the false bottom 17 and the surrounding material flow. It is then strongly stirred and dispersed by the impeller 12 at the bottom of the stirring shaft 10. The slurry enters the upper part of the mixing tank 1 for further mixing due to the thrust of the feed. At this time, part of the slurry is discharged from the discharge outlet 4, while part of the slurry that is not properly mixed is re-entered into the mixing zone through the circulation pipe 16 due to the negative pressure formed in the impeller cavity when it rotates. In addition, the circulation holes 9 on the stator cylindrical surface also allow the slurry in the lower part of the tank to undergo a re-mixing process, which enhances the mixing effect.
[0042] The fine-grained mineral circulating slurry conditioning device of this embodiment improves the problem of insufficient self-circulation in the existing slurry conditioning device by setting up a slurry circulation component. While ensuring the degree of slurry mixing and slurry conditioning effect, it reduces the number of impellers in the slurry conditioning device as much as possible, and reduces the height of the mixing tank to a certain extent.
Claims
1. A circulating slurry preparation device suitable for fine-grained minerals, characterized in that: It includes a mixing cylinder (1), and a stirring device that extends vertically into the mixing cylinder (1) is provided at the top of the mixing cylinder (1). The stirring device includes a cantilevered stirring shaft (10), and a stirring shearing component and a slurry circulation component are provided on the stirring shaft (10). The mixing cylinder (1) is provided with a mixing baffle (8) that divides its interior into upper and lower chambers. The center of the mixing baffle (8) is provided with an opening that allows the mixing shaft (10) to pass through. The mixing baffle (8) is provided with multiple circulation holes (9). The side wall of the mixing cylinder (1) is provided with a slurry inlet (3) that communicates with the lower chamber. The side wall of the slurry inlet (3) is provided with a discharge outlet (4) that communicates with the upper chamber. A dosing device that communicates with the lower chamber is provided at a position symmetrical to the slurry inlet (3) along the axis. The mixing and shearing assembly includes a mixing impeller (12) and a slurry shearing disc (13) mounted on a mixing shaft (10). The mixing impeller (12) and the slurry shearing disc (13) are arranged horizontally alternately. There are two sets of mixing impellers (12), which are respectively mounted in the upper and lower chambers of the mixing cylinder (1) via the mixing shaft (10), so that the upper and lower chambers form two mixing zones. The slurry shearing disc (13) is located between the upper and lower mixing impellers (12) and is flush with the opening of the mixing partition (8). The slurry is strongly mixed and sheared by the mixing impeller (12) and the slurry shearing disc (13). The slurry circulation component includes a stator (14) with an opening at the bottom. The stator (14) has an umbrella-shaped cover structure. The stator (14) encloses the lower stirring impeller (12) to form a wheel cavity. The top surface of the stator (14) has multiple circulation holes (9) to allow the slurry in the lower chamber to circulate back into the wheel cavity for stirring. The multiple circulation holes (9) on the stirring baffle (8) are connected to the side of the stator (14) through circulation pipes (16), so that the slurry in the upper chamber circulates back into the wheel cavity under the negative pressure in the wheel cavity. Multiple stator guide plates (15) are evenly spaced around the lower side of the stator (14), and multiple slurry outlets are provided on the side wall of the stator (14) between the stator guide plates (15); a false bottom (17) is provided below the stator (14), and a slurry suction port is provided in the center of the false bottom (17); The negative pressure generated by the rotating impeller (12) in the wheel cavity causes the slurry in the lower chamber to be drawn into the wheel cavity from the suction port of the false bottom (17). At the same time, the slurry subjected to the rotating shearing action of the slurry shearing disc (13) is also drawn into the wheel cavity through the circulation hole (9) on the top surface of the stator (14). The slurry in the upper chamber is circulated into the wheel cavity through the circulation pipe (16) for continued stirring. The slurry passing through the stator (14) and the surrounding material is drawn in, which improves the adaptability of the feed rate of the slurry conditioning device and the slurry circulation effect, improves the slurry circulation in the mixing tank, increases the degree of slurry mixing, and strengthens the slurry conditioning effect.
2. The circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: The dosing device includes a dosing pipe (5), and a dosing tank (6) is connected to the dosing pipe (5) via a pipeline. A valve (7) is provided on the pipeline.
3. A circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: The top of the mixing cylinder (1) is provided with a bucket cover (2), and the bucket cover (2) is provided with an electric drive device that provides power to the mixing shaft (10). The electric drive device is connected to the end of the mixing shaft (10) through a coupling (11).
4. A circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: The slurry shearing disc (13) and the stirring baffle (8) are at the same horizontal height. In order to prevent relatively coarse particles in the slurry from getting stuck in the stirring impeller (12), the slurry shearing disc (13) and the stirring baffle (8) have a gap on the side for the passage of coarser particles in the slurry.
5. A circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: The top of the umbrella-shaped cover structure of the stator (14) is a horizontal frustum. The top surface of the horizontal frustum is provided with 6 circulation holes (9). The cylindrical surface is surrounded by a downwardly sloping umbrella-shaped side surface. The funnel side surface is provided with 16 circulation holes (9). The side wall of the stator (14) with stator guide plates (15) is a columnar structure. Multiple slurry outlets are provided on the stator side wall between multiple stator guide plates (15), so that the sucked slurry is discharged and forms a circulation. The slurry in the upper part of the stirring baffle (8) that is still not properly mixed is re-entered into the mixing zone through the circulation pipe (16) for further mixing and adjustment, thereby enhancing the mixing effect.
6. A circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: There are 16 stator guide plates (15) and they are set at a 60° angle to the radial direction. The tilting direction of the stator guide plates (15) is consistent with the rotation direction of the impeller (12) to reduce the slurry vortex formed around the impeller (12) when it throws out the slurry, and improve the slurry mixing degree.
7. A circulating slurry conditioning device suitable for fine-grained minerals according to claim 1, characterized in that: The bottom of the mixing cylinder (1) is supported by a fixing block (18) and a false bottom (17) is provided. The false bottom (17) is just attached to the lower opening of the stator (14). The center of the false bottom (17) is provided with a slurry suction port. Multiple stator guide plates (15) are arranged at equal intervals around the circumference of the stator (14) and are connected and fixed to the false bottom (17). This realizes the slurry passage method of suction from the false bottom (17) and material flow around the periphery, which improves the adaptability to changes in the amount of slurry fed and the slurry circulation effect.
8. A method for preparing slurry using the circulating slurry preparation device suitable for fine-grained minerals as described in claim 1, characterized in that: The stirring shaft (10) is driven to rotate by an electric drive device. The slurry enters from the feed port (3). At the same time, the valve (7) of the dosing tank (6) is controlled to add slurry through the dosing pipe. The stirring impellers (12) in the upper and lower chambers rotate. The stirring impeller (12) in the stator (14) forms a negative pressure in the stator (14). The slurry enters the wheel cavity formed in the stator (14) through the suction port of the false bottom (17) and the circulation hole (9) on the top surface of the stator (14). Under the action of the stirring impeller (12) in the stator (14), the slurry is strongly stirred and dispersed. The stirred and dispersed slurry flows from the side of the stator to the guide plate (15). The slurry is discharged from the side outlet hole and gradually rises. When it rises to the slurry shear plate (13), some slurry will return to the wheel cavity through the circulation hole (9) on the top surface of the stator (14) to continue stirring. Some slurry enters the upper chamber through the gap between the slurry shear plate (13) and the stirring baffle (8). The slurry in the upper chamber continues to be stirred under the rotation of the stirring impeller (12) in the upper chamber. Some slurry in the upper chamber is sucked into the wheel cavity again through the circulation hole (9) of the stirring baffle (8) along the circulation pipe (16) for circulation stirring and re-adjustment, which enhances the slurry adjustment effect. After multiple stirring and slurry adjustment, some slurry is discharged from the discharge port (4).