Bentonite slurry concentration device and concentration method

Abstract

The invention relates to the technical field of bentonite processing, and particularly provides a bentonite slurry concentration device and a concentration method. The concentration device comprises a rotary drum, a feeding assembly and a collecting assembly. Wherein the rotary drum can rotate around the axis; the rotating drum comprises an overflow part and a separation part which are arranged from top to bottom, the overflow part is arranged to be an inverted conical surface, and the separation part is arranged to be an upright conical surface. A feeding opening of the feeding assembly communicates with the exterior of the rotary drum, and a discharging opening of the feeding assembly is located in the rotary drum and faces the drum wall of the separation part. The collecting assembly communicates with the upper and lower side ends of the rotary drum correspondingly. The problem of continuous concentration of the low-concentration bentonite slurry is solved, and compared with an existing concentration device, the low-concentration bentonite slurry concentration device is higher in efficiency and can be continuously carried out. The structure is simple, the cost is lower, and material blockage can be avoided while a good separation and concentration effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bentonite processing, and in particular to a bentonite slurry concentrating device and a concentrating method. Background Art

[0002] Natural bentonite has a low purity and needs to be purified before use. Bentonite has strong hygroscopicity and expansion properties, and can absorb 8 to 15 times its own volume of water, and expand several times, dispersing into gel and suspension in water media.

[0003] Wet purification is to use the hygroscopicity of bentonite to put it into water. Useful minerals absorb water, disintegrate, and swell in water to form a suspension; while impurity minerals do not change their particle size when in contact with water and have poor suspension. Purification is achieved by separating impurities through screening and centrifugation.

[0004] When the bentonite slurry concentration is too high, the fluidity is low and it is difficult to separate it from impurities by centrifugation. Therefore, the slurry concentration is low during the wet purification process, and a large amount of water still exists after the impurities are separated and purified. Due to the good suspension of bentonite, it is difficult to concentrate it by sedimentation or filter pressing. The purified slurry lacks a high-efficiency concentration device that can be carried out continuously. Summary of the invention

[0005] The invention provides a bentonite slurry concentration device and a concentration method, which at least solve the problem of continuous concentration of the bentonite slurry after purification.

[0006] On the one hand, the present invention provides a bentonite slurry concentration device, comprising: a rotating drum, a feeding assembly and a collecting assembly; The drum can rotate around an axis; the drum comprises an overflow portion and a separation portion arranged from top to bottom, the overflow portion is arranged as an inverted conical surface, and the separation portion is arranged as an upright conical surface; The feeding port of the feeding assembly is connected to the outside of the drum, and the discharging port of the feeding assembly is located inside the drum and is arranged toward the drum wall of the separation part; The collecting assembly is connected to the upper and lower ends of the rotating drum respectively.

[0007] The invention provides a bentonite slurry concentration device in an embodiment of the invention, wherein the feed assembly comprises a feed pipe and a material distributor, and the feed pipe is externally connected to a pressure control device; One end of the feed pipe is configured as the feed port, and the other end of the feed pipe is configured as the feed dispensing port; The material distributor comprises a material guide pipe, one end of which is communicated with a material distribution port of the feed pipe, and the other end of which is arranged as the material discharge port.

[0008] The invention provides a bentonite slurry concentrating device according to an embodiment of the invention, wherein the feed pipe is arranged along the axis of the rotating drum and penetrates the rotating drum from top to bottom; and the guide pipe extends along the radial direction of the cross section of the rotating drum.

[0009] The invention provides a bentonite slurry concentrating device in an embodiment, wherein there are a plurality of material guide pipes; the plurality of material guide pipes are arranged at equal intervals along the circumferential direction of the cross section of the drum.

[0010] An embodiment of the present invention provides a bentonite slurry concentrating device, in which, in the radial direction of the cross section of the drum, the ratio of the extension length of the guide pipe to the cross-sectional radius of the drum is greater than or equal to 0.5 and less than or equal to 0.8.

[0011] The present invention provides a bentonite slurry concentration device in an embodiment, wherein the separation section includes a connecting section and a material guiding section; The material guiding section is arranged at the lower end of the separation section, and the connecting section is arranged between the material guiding section and the overflow section; The connecting section and the material guiding section are both arranged as downwardly opening conical surfaces; the taper of the connecting section is smaller than the taper of the material guiding section; and the material outlet of the feeding assembly is arranged toward the cylinder wall of the material guiding section.

[0012] The invention provides a bentonite slurry concentration device according to an embodiment of the invention, wherein the collecting assembly comprises a discharge adjustment member and a first discharge channel; The discharge adjustment member comprises an inner ring and an outer ring which are relatively rotatable, the inner ring being connected to the lower end of the separation portion, the inner ring being coaxially arranged inside the outer ring and being in contact with the inner wall of the outer ring; The inner ring and the outer ring are both provided with material passing through holes; The first material discharge channel is connected to the material passing through hole.

[0013] The invention provides a bentonite slurry concentrating device according to an embodiment of the invention. The bentonite slurry concentrating device further includes a guide plate, which is arranged below the discharge adjusting member. The guide plate is arranged as an inverted conical surface. The guide plate is provided with a liquid passing hole.

[0014] The present invention provides a bentonite slurry concentration device according to an embodiment of the invention, wherein the collecting component further comprises a second feed channel, and the overflow portion is connected to a clear liquid outlet via the second feed channel.

[0015] On the other hand, the present invention also provides a bentonite slurry concentration method, which is implemented by the bentonite slurry concentration device in any of the above embodiments, and the method includes: The bentonite slurry to be concentrated is introduced through the feed port of the feed assembly; The driving member drives the drum to rotate, and the bentonite slurry to be concentrated enters the separation part of the drum through the discharge port; The rotating drum drives the slurry in the drum to rotate, and the solid particles in the slurry move downward along the drum wall of the separation part under the action of centrifugal force, and the clear liquid in the slurry is stored inside the rotating drum under the action of centrifugal force and overflows from the overflow part; The collecting components collect the solid particles and the clear liquid respectively, and the solid particles are concentrated bentonite slurry.

[0016] The bentonite slurry concentration device and concentration method provided by the invention solve the problem of continuous concentration of low-concentration bentonite slurry, and are more efficient and can be carried out continuously compared with the existing concentration device. The structure is simple and the cost is low, and material blockage can be avoided while achieving a better separation and concentration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a schematic structural diagram of a bentonite slurry concentrating device according to an embodiment of the present invention.

[0019] Figure 2 It is a top view of a bentonite slurry concentrating device according to an embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of a discharge regulating member of an embodiment of the present invention.

[0021] The above drawings include the following reference numerals: 1—rotating drum; 11—overflow section; 12—separation section; 1201—connecting section; 1202—material guiding section; 21—feeding pipe; 2101—loading port; 2102—distribution port; 22—material distributor; 2201—material guiding pipe; 2202—discharging port; 3—machine housing; 4—motor; 5—discharging adjustment member; 51—inner ring; 52—outer ring; 53—material passing hole; 6—first discharging channel; 7—guide plate; 8—second discharging channel; 81—clear liquid outlet. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] At present, the purification methods of bentonite mainly include dry purification and wet purification. Among them, dry purification uses the hardness difference between useful minerals and impurity minerals. Impurities are not easy to grind during the grinding process. The coarse particles of impurities are separated by classification to achieve the purification effect. For bentonite ore, the purification effect of dry process is poor.

[0026] The wet process is to put bentonite into water to form a suspension with a particle size of less than 5 microns and high viscosity, while impurities have poor suspension properties, and are separated and purified by screening, centrifugation and other methods. To ensure the purification effect, the bentonite slurry needs to have a certain fluidity, so the problem of the high viscosity of bentonite colloid affecting the fluidity of the slurry is solved by reducing the concentration. The inventors of this case have found that the concentration of the purified slurry is mostly below 6%.

[0027] In the prior art, water in the slurry can be removed by evaporation, but the evaporation method takes a long time to dry, has low efficiency and high cost. Although the evaporation time can be shortened by concentrating the slurry with a centrifuge and then evaporating it, on the one hand, the intermittent production method of the centrifuge means that the bentonite slurry can only be concentrated in batches and cannot be produced continuously; on the other hand, some existing centrifuges have holes on the wall for centrifugal liquid, which is not suitable for the material characteristics of bentonite slurry and is very easy to cause blockage.

[0028] Reference Figures 1 to 3As shown, the present application provides a bentonite slurry concentration device. It is used to concentrate the slurry after purifying bentonite by wet process, continuously and efficiently concentrate the bentonite slurry to remove moisture and control production costs. The slurry concentration is quickly increased to about 30%. The present application has a simple structure and strong adjustability, and can adapt to the processing needs of raw materials of different concentrations.

[0029] Reference Figure 1 As shown, the bentonite slurry concentrating device comprises a housing 3, a drum 1, a feed assembly and a collection assembly. Inside the housing 3, the feed assembly is used to add slurry into the drum 1, and the concentrated bentonite slurry is collected by the collection assembly after the drum 1 rotates and separates.

[0030] Specifically, the drum 1 can rotate around an axis, and the upper and lower ends of the drum 1 are fixed to the housing 3 through a rotating shaft. The rotating shaft at the lower end of the drum 1 is connected to a motor 4, and the motor 4 provides power to drive the drum 1 to rotate at high speed. The motor 4 is preferably configured as a variable frequency motor.

[0031] Reference Figure 1 As shown, the drum 1 includes an overflow portion 11 and a separation portion 12 arranged from top to bottom, the overflow portion 11 is arranged as an inverted conical surface, and the separation portion 12 is arranged as an upright conical surface. The feed assembly pumps the slurry toward the wall of the drum 1 to the separation portion 12. When the drum 1 rotates, the solids and clear liquids of different densities are separated by centrifugal force. The setting of the conical surface can facilitate the collection of solids and clear liquids.

[0032] Further, in a preferred embodiment of the present application, referring to Figure 1 As shown, the separation portion 12 includes a connecting section 1201 and a material guide section 1202; the material guide section 1202 is arranged at the lower end of the separation portion 12, and the connecting section 1201 is arranged between the material guide section 1202 and the overflow portion 11. The connecting section 1201 and the material guide section 1202 are both arranged as downwardly opened conical surfaces, and the taper of the connecting section 1201 is smaller than the taper of the material guide section 1202.

[0033] The solid particles and water in the slurry rotate at high speed inside the drum 1. Due to the difference in weight and density, the solid particles move to the drum wall around the drum 1 under the action of centrifugal force, while the clear liquid remains in the center of the drum 1. The larger the radius of the cross section of the drum 1, the greater the centrifugal force during rotation, so the solid particles near the lower end of the separation part 12 are easier to collect.

[0034] The separation part 12 is provided with a connection section 1201 and a guide section 1202 with different tapers, which can avoid the limitation of the size and space occupied by the conical surface of a single taper on the drum 1: if the taper of the separation part 12 is too large, the drum 1 occupies more space at the same height; if the taper of the separation part 12 is too small, the centrifugal effect will be poor at the same height. The setting of the two conical surfaces of the separation part 12 can not only rationalize the space occupied by the drum 1, but also achieve a better separation effect.

[0035] Preferably, the cone angle of the connecting section 1201 is set to 10° to 20°; the cone angle of the guiding section 1202 is set to 20° to 40°. After the connecting section 1201 separates the solid and the clear liquid, the guiding section 1202 provides a greater centrifugal force to facilitate the solid particles to be discharged and collected in the direction of a larger radius.

[0036] It should be noted that during the concentration process, the inside of the drum 1 is filled with solid particles and clear liquid, and the solid particles are concentrated on the drum wall, and more are located on the drum wall at the lower end of the drum 1. The clear liquid is located at the center of the drum 1 and increases with accumulation. After the water level of the clear liquid continues to rise, it overflows from the overflow part 11 and is collected.

[0037] The overflow portion 11 is set as an inverted cone, which is convenient for the collection of clear liquid overflow on the one hand; on the other hand, it cooperates with the upright cone of the separation portion 12 to maintain the balance of the drum 1 during the rotation process. Since the solid materials are concentrated at the lower end, the lower end of the drum 1 is heavy and the upper end is light, forming a gyroscope-like rotation effect, which can also maintain a stable and reliable structure during high-speed rotation. Preferably, the cone angle of the overflow portion 11 is set to 40° to 60°; the rotation speed of the drum 1 is less than 3000rpm.

[0038] Specifically, refer to Figure 1 As shown, the feed assembly includes a feed pipe 21 and a material distributor 22. The feed pipe 21 is externally connected to a pressure control device, which controls the pressure inside the pipe of the feed assembly and controls the slurry separation rate in coordination with the rotation speed of the drum 1.

[0039] The feed pipe 21 is arranged along the axis of the drum 1 and penetrates the drum 1 from top to bottom. One end of the feed pipe 21 is arranged as a feed port 2101, which is connected to the outside of the drum 1 for introducing bentonite slurry to be concentrated; the other end of the feed pipe 21 is arranged as a material distribution port 2102, which is connected to the material distributor 22.

[0040] Next, the material distributor 22 includes a guide pipe 2201, one end of which is connected to the material distribution port 2102 of the feed pipe 21, and the other end of the guide pipe 2201 is set as a discharge port 2202, which is located inside the drum 1 and is set toward the drum wall of the guide section 1202. The discharge port 2202 is set as an inclined surface with an inclination angle of 45° to 60°, and the upper end is closer to the drum wall, so that the material can reach the drum wall more easily when being pumped out.

[0041] The guide pipe 2201 extends along the radial direction of the cross section of the drum 1 and is provided in plurality. The guide pipes 2201 are arranged at equal intervals along the circumferential direction of the cross section of the drum 1 and pump out the slurry evenly outward in an umbrella-shaped manner, so that the slurry can be evenly distributed on the drum wall of the drum 1.

[0042] It should be noted that, refer to Figure 1 As shown, in the radial direction of the cross section of the drum 1, the ratio of the extension length of the guide tube 2201 to the cross-sectional radius of the drum 1 is greater than or equal to 0.5 and less than or equal to 0.8. When the ratio of the guide tube 2201 to the cross-sectional radius of the drum 1 is large, the space for the material to move in the drum 1 is small, the separation effect is insufficient and the material is easily blocked at the discharge port 2202. When the ratio of the guide tube 2201 to the cross-sectional radius of the drum 1 is small, the discharge port 2202 is far from the drum wall, and the slurry entering the drum 1 is difficult to move to the drum wall, which is inconvenient to separate and collect.

[0043] Specifically, refer to Figure 1 As shown, the collecting assembly is connected to the upper and lower ends of the drum 1 respectively for collecting clear liquid and solid particles. The collecting assembly includes a discharge adjustment member 5, a first discharge channel 6 and a second discharge channel 8.

[0044] Among them, refer to Figure 2 and Figure 3 As shown, the discharge adjustment member 5 includes two layers of nested porous rings, specifically an inner ring 51 and an outer ring 52 that can rotate relatively, the inner ring 51 is connected to the lower end of the separation part 12, the inner ring 51 is coaxially arranged inside the outer ring 52, and fits with the inner wall of the outer ring 52; both the inner ring 51 and the outer ring 52 are provided with a material passing hole 53. When the outer ring 52 is rotated, the material passing holes 53 of the inner and outer rings are staggered, and the size of the solid particle outlet is controlled by the misalignment of the material passing holes 53, thereby controlling the discharge speed and achieving the purpose of controlling concentration.

[0045] In some embodiments, the material discharging adjusting member 5 can also be configured such that the outer ring 52 is fixed and the inner ring 51 rotates to produce relative movement. The material passing holes 53 of the inner and outer rings are preferably configured to have the same aperture to facilitate misalignment adjustment.

[0046] One end of the first material discharge channel 6 is connected to the material passing through hole 53 of the material discharge regulating member 5, and the other end is arranged above the collecting box. The first material discharge channel 6 is used for discharging the concentrated slurry.

[0047] One end of the second material discharge channel 8 is connected to the overflow portion 11, and the other end is connected to the clear liquid outlet 81. The second material discharge channel 8 is used for leading out the clear liquid.

[0048] Specifically, refer to Figure 1 As shown, the bentonite slurry concentration device further includes a guide plate 7, which is arranged below the discharge adjustment member 5, and the guide plate 7 is arranged as an inverted conical surface. When the concentration device is in use, solid particles accumulate on the lower side wall of the drum 1, referring to Figure 1 As shown, taking the arrow on the right as an example, the direction of the arrow is the moving path of the clear liquid. The clear liquid rotates at high speed around the axis of the drum 1 below the material distributor 22 to form a vortex. The conical setting of the guide plate 7 cooperates with the clear liquid flow pattern to achieve isolation of the clear liquid from the peripheral solid particles. Figure 1 The flow direction of the clear liquid on the left side in the cylinder is symmetrical to that on the right side, and will not be described in detail.

[0049] Next, the radius of the upper end of the guide plate 7 is smaller than the radius of the guide tube 2201 to prevent the clear liquid in the guide plate 7 from affecting the slurry pumping of the feed assembly. The guide plate 7 is provided with a liquid through hole, which is used to balance the liquid pressure inside and outside the guide plate 7. In some embodiments, the liquid through hole is set as a circular hole with a diameter of 5mm to 10mm. In some embodiments, a narrow slit with a width of 2mm to 8mm can also be set on the guide plate 7 instead of the liquid through hole.

[0050] On the other hand, an embodiment of the present application further provides a bentonite slurry concentration method, which is implemented by the above-mentioned bentonite slurry concentration device. Since the technical effects of the concentration device have been described in detail above, they will not be repeated here.

[0051] The concentration method comprises: The low-concentration bentonite slurry to be concentrated is introduced through the feed port 2101 of the feed assembly, and the pressure in the feed pipe 21 is controlled by the pressure control device.

[0052] The low-concentration slurry flows from top to bottom and enters the separation part 12 of the drum 1 through the discharge port 2202 of the material distributor 22 .

[0053] The variable frequency motor is used as a driving member to drive the drum 1 to rotate, and drives the slurry in the drum to rotate synchronously.

[0054] The solid particles in the slurry move to the surrounding cylinder walls under the action of centrifugal force, and move downward along the cylinder wall of the separation part 12, enter the discharge adjustment member 5 at the bottom of the rotating cylinder 1, and the discharge speed is controlled by the discharge adjustment member 5, and finally enter the collection box through the first discharge channel 6. The solid particles are concentrated bentonite slurry with less water content and higher concentration.

[0055] The clear liquid in the slurry is stored inside the drum 1 under the action of centrifugal force, and generates a vortex as the drum 1 rotates. As more slurry is introduced, the clear liquid obtained by centrifugation gradually increases and fills the inside of the drum 1. The pressure of the clear liquid in the drum gradually increases, and under the action of pressure, it passes through the liquid through hole on the guide plate 7, and then passes through the gap between the guide pipes 2201 in the material distributor 22 and moves upward to the overflow part 11, and overflows from the overflow part 11; finally, it is discharged and collected from the clear liquid outlet 81 through the second discharge channel 8.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0058] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bentonite slurry concentration device, characterized in that: include: Rotating drum, feeding assembly and collecting assembly; The drum can rotate around an axis; the drum comprises an overflow portion and a separation portion arranged from top to bottom, the overflow portion is arranged as an inverted conical surface, and the separation portion is arranged as an upright conical surface; The feeding port of the feeding assembly is connected to the outside of the drum, and the discharging port of the feeding assembly is located inside the drum and is arranged toward the drum wall of the separation part; The collecting assembly is connected to the upper and lower ends of the rotating drum respectively.

2. The bentonite slurry concentration device according to claim 1, characterized in that: The feed assembly comprises a feed pipe and a material distributor, and the feed pipe is externally connected to a pressure control device; One end of the feed pipe is configured as the feed port, and the other end of the feed pipe is configured as the feed dispensing port; The material distributor comprises a material guide pipe, one end of which is communicated with a material distribution port of the feed pipe, and the other end of which is arranged as the material discharge port.

3. The bentonite slurry concentration device according to claim 2, characterized in that: The feed pipe is arranged along the axis of the drum and penetrates the drum from top to bottom; the guide pipe extends along the radial direction of the cross section of the drum.

4. The bentonite slurry concentration device according to claim 3, characterized in that: There are multiple material guide pipes, and the multiple material guide pipes are arranged at equal intervals along the circumferential direction of the cross section of the drum.

5. The bentonite slurry concentration device according to claim 3, characterized in that: In the radial direction of the cross section of the drum, the ratio of the extension length of the guide tube to the cross-sectional radius of the drum is greater than or equal to 0.5 and less than or equal to 0.

8.

6. The bentonite slurry concentration device according to any one of claims 1 to 5, characterized in that: The separation section comprises a connecting section and a material guiding section; The material guiding section is arranged at the lower end of the separation section, and the connecting section is arranged between the material guiding section and the overflow section; The connecting section and the material guiding section are both arranged as downwardly opening conical surfaces; the taper of the connecting section is smaller than the taper of the material guiding section; and the material outlet of the feeding assembly is arranged toward the cylinder wall of the material guiding section.

7. The bentonite slurry concentration device according to claim 1, characterized in that: The collecting assembly includes a discharge adjustment member and a first discharge channel; The discharge adjustment member comprises an inner ring and an outer ring which are relatively rotatable, the inner ring being connected to the lower end of the separation portion, the inner ring being coaxially arranged inside the outer ring and being in contact with the inner wall of the outer ring; The inner ring and the outer ring are both provided with material passing through holes; The first material discharge channel is connected to the material passing through hole.

8. The bentonite slurry concentration device according to claim 7, characterized in that: The bentonite slurry concentration device further comprises a guide plate, which is arranged below the discharge adjustment member and is arranged as an inverted conical surface; the guide plate is provided with a liquid through hole.

9. The bentonite slurry concentration device according to claim 1, characterized in that: The collecting assembly further comprises a second feeding channel, and the overflow portion is connected to a clear liquid outlet via the second feeding channel.

10. A method for concentrating bentonite slurry, characterized in that: The method is implemented by a bentonite slurry concentration device as claimed in any one of claims 1 to 9, and the method comprises: The bentonite slurry to be concentrated is introduced through the feed port of the feed assembly; The driving member drives the drum to rotate, and the bentonite slurry to be concentrated enters the separation part of the drum through the discharge port; The rotating drum drives the slurry in the drum to rotate, and the solid particles in the slurry move downward along the drum wall of the separation part under the action of centrifugal force, and the clear liquid in the slurry is stored inside the rotating drum under the action of centrifugal force and overflows from the overflow part; The collecting components collect the solid particles and the clear liquid respectively, and the solid particles are concentrated bentonite slurry.

Images