Superfine kaolin production system

Abstract

The utility model relates to the technical field of kaolin production, and discloses a superfine kaolin production system which comprises multiple stages of hydraulic cyclone screening devices which are sequentially connected, each hydraulic cyclone screening device comprises a hydraulic cyclone, an overflow pipe and a screening mechanism, and the screening mechanism is arranged above the hydraulic cyclone. And the screening mechanism is communicated with the hydrocyclone through the overflow pipe and is used for further screening the kaolin slurry flowing out of the overflow pipe. The kaolin screening device has the beneficial effects that after kaolin slurry passes through the hydrocyclone, large-particle substances flow out from the bottom of the hydrocyclone under the action of gravity, small-particle kaolin enters the screening cylinder from the overflow port, the screening plate is arranged in the screening cylinder, the driving piece drives the screening plate to vibrate, and the kaolin slurry in the screening cylinder is further screened; kaolin meeting the particle size requirement can penetrate through the sieve plate and flow to the next procedure through the water outlet pipe, kaolin or other impurities not meeting the particle size requirement are left below the sieve plate, and the classification efficiency of the hydrocyclone is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kaolin production, in particular to an ultra-fine kaolin production system. Background Art

[0002] Ultrafine kaolin is a natural mineral material with high purity, fine particles and high specific surface area. It is widely used at home and abroad, mainly in the fields of ceramics, rubber, plastics, coatings, paints, etc. The domestic ultrafine kaolin processing methods mainly include wet grinding, dry grinding and chemical treatment. Wet grinding is currently a more commonly used method. The original kaolin is ground, graded and dispersed by wet grinding mechanical equipment; dry grinding is the dry processing of kaolin using equipment such as air jet mills; chemical treatment methods include acid dissolution, alkali treatment, ion exchange, etc. to change the properties of kaolin.

[0003] The Chinese invention patent with the authorization announcement number CN114247558B discloses a method for preparing kaolin with a narrow particle size distribution, which uses a vibrating screen and a horizontal centrifuge to screen the raw slurry, and then grinds the screened kaolin. The power of the vibrating screen is relatively large, and directly using the vibrating screen to screen the raw slurry consumes a lot of power and has low screening efficiency. Utility Model Content

[0004] The utility model aims to improve the kaolin screening efficiency and prepare ultrafine kaolin. Aiming at the above-mentioned shortcomings of the prior art, the utility model provides an ultrafine kaolin production system.

[0005] A superfine kaolin production system comprises a multi-stage hydrocyclone screening device connected in sequence, wherein the hydrocyclone screening device comprises a hydrocyclone, an overflow pipe and a screening mechanism, wherein the screening mechanism is arranged above the hydrocyclone and is connected to the hydrocyclone through the overflow pipe, and the screening mechanism is used for further screening the kaolin slurry flowing out of the overflow pipe.

[0006] The above technical solution is further configured as follows: the screening mechanism includes a screening drum, a support ring, a sieve plate and a driving member, the screening drum is fixedly connected above the hydrocyclone, the support ring is fixedly connected to the inner wall of the screening drum, the top surface of the support ring is connected to the sieve plate through a spring, the upper end of the overflow pipe is located in the screening drum, and the overflow pipe is located below the sieve plate, and the driving member is fixedly connected below the sieve plate to drive the sieve plate to vibrate.

[0007] By adopting the above technical solution: a screening cylinder is arranged above the hydrocyclone, and the upper end of the overflow pipe is located in the screening cylinder. After the kaolin slurry passes through the hydrocyclone, large particles of matter flow out from the bottom of the hydrocyclone under the action of gravity, and small particles of kaolin enter the screening cylinder from the overflow port. A sieve plate is arranged in the screening cylinder, and the driving member drives the sieve plate to vibrate, so as to further screen the kaolin slurry in the screening cylinder, so that the kaolin that meets the particle size requirements can pass through the sieve plate and flow to the next process through the outlet pipe, while the kaolin that does not meet the particle size requirements or other impurities remain under the sieve plate, thereby improving the classification efficiency of the hydrocyclone.

[0008] The above technical solution is further configured as follows: the diameter of the sieve plate is smaller than the diameter of the sieve drum, and an elastic sealing member is provided between the outer wall of the sieve plate and the inner wall of the sieve drum.

[0009] By adopting the above technical solution: by arranging an elastic seal, the gap between the screen plate and the screening cylinder can be sealed to prevent large particles of kaolin from flowing out of the gap, while not affecting the vibration of the screen plate.

[0010] The above technical solution is further configured as follows: a reflux pipe is provided at the lower end of the screening cylinder, a feed pipe is provided at the side of the hydrocyclone, and the reflux pipe is communicated with the feed pipe.

[0011] By adopting the above technical solution: a reflux pipe is arranged at the lower end of the screening cylinder, and the reflux pipe is connected with the feed pipe. Because the water pressure in the feed pipe of the hydrocyclone is high and the water flow speed in the feed pipe is fast, a negative pressure can be formed at the junction of the reflux pipe and the feed pipe, and the liquid in the reflux pipe is quickly mixed with the influent water and then re-enters the hydrocyclone. The reflux pipe returns the kaolin slurry after screening by the sieve plate to the hydrocyclone for further classification. This setting can improve the classification effect of the hydrocyclone.

[0012] The above technical solution is further configured as follows: the bottom surface of the screening cylinder is connected to a stirring member via a spring, and the stirring member is connected to the screen plate via a connecting rod.

[0013] By adopting the above technical solution: when the screen plate vibrates, the stirring member can be driven to vibrate through the connecting rod, thereby stirring the kaolin slurry in the screening cylinder and preventing the kaolin from being deposited in the screening cylinder.

[0014] The above technical solution is further configured as follows: the stirring member includes a bracket and a plurality of stirring blades, the lower end of the bracket is fixedly connected to a spring, and the upper end is fixedly connected to a connecting rod, and the plurality of stirring blades are obliquely arranged on the bracket.

[0015] By adopting the above technical solution: the sieve plate is connected to the bracket of the stirring member through a connecting rod, the driving member drives the sieve plate to vibrate, and the sieve plate can drive the bracket to vibrate, so that the stirring blades on the bracket move up and down, forming turbulence at the bottom of the screening cylinder.

[0016] The above technical solution is further configured as follows: a water outlet pipe is provided above the screening cylinder.

[0017] The above technical solution is further configured as follows: the stirring member is located below the water outlet of the overflow pipe, and the bracket is provided with a through hole for the overflow pipe to pass through.

[0018] The above technical solution is further configured as follows: the water outlet pipe of the screening drum is connected to the water inlet pipe of the next-stage hydrocyclone.

[0019] The beneficial effects of the utility model are:

[0020] 1. A screening cylinder is arranged above the hydrocyclone, and the upper end of the overflow pipe is located in the screening cylinder. After the kaolin slurry passes through the hydrocyclone, large particles flow out from the bottom of the hydrocyclone under the action of gravity, and small particles of kaolin enter the screening cylinder from the overflow port. A sieve plate is arranged in the screening cylinder, and the driving member drives the sieve plate to vibrate, so as to further screen the kaolin slurry in the screening cylinder, so that the kaolin that meets the particle size requirements can pass through the sieve plate and flow to the next process through the outlet pipe, while the kaolin that does not meet the particle size requirements or other impurities remain under the sieve plate, thereby improving the classification efficiency of the hydrocyclone.

[0021] 2. The reflux pipe returns the kaolin slurry after screening by the sieve plate to the hydrocyclone for further classification. This setting can improve the classification effect of the hydrocyclone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of the utility model.

[0023] Figure 2 It is a schematic diagram of the internal structure of the hydrocyclone screening device.

[0024] Figure 3 It is a schematic diagram of the main view of the internal structure of the screening mechanism.

[0025] Figure 4 Schematic diagram of the internal structure of the screening mechanism.

[0026] In the figure, 101, hydrocyclone screening device; 102, horizontal spiral centrifuge; 103, sand mill; 1, hydrocyclone; 2, overflow pipe; 3, screening mechanism; 31, screening cylinder; 32, support ring; 33, sieve plate; 34, driving member; 5, spring; 6, water outlet pipe; 7, elastic sealing member; 8, reflux pipe; 9, feed pipe; 11, stirring member; 111, bracket; 112, stirring blade; 12, connecting rod. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Example 1

[0029] A system for producing ultrafine kaolin, such as Figure 1 As shown, it includes a three-stage hydrocyclone screening device 101, a horizontal spiral centrifuge 102 and a sand mill 103 connected in sequence, and the classification particle size of the multi-stage hydrocyclone screening device 101 is gradually reduced. The three-stage hydrocyclone screening device 101 performs three hydrocyclone classifications on the rough kaolin slurry (Ø250 overflow slurry), and then uses the centrifugal classification technology of the horizontal spiral centrifuge 102 to further classify the kaolin slurry, and finally uses the ultra-fine grinding technology of the horizontal sand mill 103 to achieve narrow particle size control of the kaolin.

[0030] like Figure 2 As shown, the hydrocyclone screening device 101 includes a hydrocyclone 1, an overflow pipe 2 and a screening mechanism 3. The overflow pipe 2 connects the screening mechanism 3 and the hydrocyclone 1. The screening mechanism 3 is used to further screen the kaolin slurry flowing out of the overflow pipe 2.

[0031] Example 2

[0032] like Figure 3 , Figure 4 As shown, the screening mechanism 3 includes a screening cylinder 31, a support ring 32, a screen plate 33 and a driving member 34. The screening cylinder 31 is fixedly connected to the top of the hydrocyclone 1 of the hydrocyclone 1, the support ring 32 is fixedly connected to the inner wall of the screening cylinder 31, the top surface of the support ring 32 is connected to the screen plate 33 through a spring 5, and a driving member 34 is provided below the screen plate 33. The driving member 34 is a vibration motor, and the vibration motor drives the screen plate 33 to vibrate. The upper end of the overflow pipe 2 is located in the screening cylinder 31, and the overflow pipe 2 is arranged below the screen plate 33. The kaolin slurry classified by the hydrocyclone 1 enters the screening cylinder 31 through the overflow pipe 2, and is further screened through the screen plate 33. The kaolin particles that do not meet the particle size requirements are screened out from the slurry, and the kaolin that meets the particle size requirements is discharged from the outlet pipe 6. A water outlet pipe 6 is provided above the screening cylinder 31 , and the water outlet pipe 6 is connected to the water inlet pipe of the next-stage hydrocyclone 1 . Through the multi-stage hydrocyclone 1 , narrow-particle-size kaolin can be screened out.

[0033] like Figure 4 As shown, the diameter of the sieve plate 33 is smaller than that of the sieve cylinder 31 , and an elastic seal 7 is provided between the outer wall of the sieve plate 33 and the inner wall of the sieve cylinder 31 to prevent large particles of kaolin from flowing out of the gap between the sieve plate 33 and the sieve cylinder 31 .

[0034] like Figure 2 As shown, a reflux pipe 8 is provided at the lower end of the screening cylinder 31, and a feed pipe 9 is provided on the side of the hydrocyclone 1. The reflux pipe 8 is connected to the feed pipe 9. The slurry screened by the screen plate 33 flows back to the hydrocyclone 1 along the reflux pipe 8 for further classification.

[0035] Example 3

[0036] like Figure 3 , Figure 4 As shown, the bottom surface of the screening drum 31 is connected to a stirring member 11 through a spring 5. The stirring member 11 includes a bracket 111 and a plurality of stirring blades 112. The lower end of the bracket 111 is fixedly connected to the spring 5, and the upper end is fixedly connected to the connecting rod 12. The upper end of the connecting rod 12 is fixedly connected to the sieve plate 33. When the vibration motor drives the sieve plate 33 to vibrate, the sieve plate 33 can drive the stirring blades 112 to vibrate through the connecting rod 12, thereby stirring the slurry at the bottom of the screening drum 31 to prevent kaolin from being deposited at the bottom of the screening drum 31.

[0037] The stirring member 11 is located below the water outlet of the overflow port, and the bracket 111 is provided with a through hole for the overflow pipe 2 to pass through.

[0038] For matters not mentioned above, the prior art applies.

[0039] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the utility model or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made to the above implementation methods based on the technical essence of the utility model should be included in the protection scope of the utility model.

Claims

1. An ultrafine kaolin production system, characterized in that: The invention comprises a multi-stage hydrocyclone screening device (101) connected in sequence, wherein the hydrocyclone screening device comprises a hydrocyclone (1), an overflow pipe (2) and a screening mechanism (3), wherein the screening mechanism (3) is arranged above the hydrocyclone (1) and is connected to the hydrocyclone (1) via the overflow pipe (2), and the screening mechanism (3) is used for further screening the kaolin slurry flowing out of the overflow pipe (2).

2. The ultrafine kaolin production system according to claim 1, characterized in that: The screening mechanism (3) comprises a screening drum (31), a support ring (32), a screen plate (33) and a driving member (34); the screening drum (31) is fixedly connected above the hydrocyclone (1); the support ring (32) is fixedly connected to the inner wall of the screening drum (31); the screen plate (33) is connected to the top surface of the support ring (32) via a spring (5); the driving member (34) is fixedly connected below the screen plate (33) and is used to drive the screen plate (33) to vibrate; the upper end of the overflow pipe (2) is located inside the screening drum (31), and the overflow pipe (2) is located below the screen plate (33).

3. The ultrafine kaolin production system according to claim 2, characterized in that: The diameter of the sieve plate (33) is smaller than the diameter of the sieve drum (31), and an elastic sealing member (7) is provided between the outer wall of the sieve plate (33) and the inner wall of the sieve drum (31).

4. The ultrafine kaolin production system according to claim 2, characterized in that: A return pipe (8) is provided at the lower end of the screening cylinder (31), a feed pipe (9) is provided on the side of the hydrocyclone (1), and the return pipe (8) is connected to the feed pipe (9).

5. The ultrafine kaolin production system according to claim 2, characterized in that: The bottom surface of the screening cylinder (31) is connected to a stirring member (11) via a spring (5), and the stirring member (11) and the screening plate (33) are connected via a connecting rod (12).

6. The ultrafine kaolin production system according to claim 5, characterized in that: The stirring member (11) comprises a bracket (111) and a plurality of stirring blades (112); the bracket (111) has a lower end fixedly connected to a spring (5) and an upper end fixedly connected to a connecting rod (12); and the plurality of stirring blades (112) are arranged obliquely on the bracket (111).

7. The ultrafine kaolin production system according to claim 6, characterized in that: The stirring member (11) is located below the water outlet of the overflow pipe (2), and the bracket (111) is provided with a through hole for the overflow pipe (2) to pass through.

8. The ultrafine kaolin production system according to claim 2, characterized in that: A water outlet pipe (6) is provided above the screening cylinder (31).

9. The ultrafine kaolin production system according to claim 8, characterized in that: The water outlet pipe (6) of the screening drum (31) is connected to the water inlet pipe of the next-stage hydrocyclone (1).

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