A defoaming device for flotation machines

Abstract

This utility model discloses a defoaming device for a flotation machine, including a receiving tank and a defoaming tube. The defoaming tube is a tube structure with openings at both ends, with its lower end set inside the receiving tank. A top cover is provided at the upper end of the defoaming tube, and the lower end of the top cover extends into the defoaming tube to provide a perforated plate. A rotating shaft is rotatably mounted in the top cover, with its upper end extending above the top cover and connected to a motor, and its lower end extending below the perforated plate. A shearing assembly, a fan blade assembly, and a centrifugal disc are sequentially installed from top to bottom. The shearing assembly abuts against the lower end face of the perforated plate, and the centrifugal disc extends below the lower end of the defoaming tube, completely covering the lower end of the defoaming tube. This utility model, by sequentially arranging the shearing assembly, fan blade assembly, and centrifugal disc on the rotating shaft, performs multi-step defoaming of foam products. Furthermore, the centrifugal disc at the bottom layer can perform high-speed centrifugal defoaming on the incoming liquid without any leakage, resulting in better defoaming effect.

Description

Technical Field

[0001] This utility model relates to the field of defoaming technology for flotation machines, specifically a defoaming device for flotation machines. Background Technology

[0002] In mineral processing and other fields, flotation machines separate target minerals from gangue minerals by adding reagents to the slurry and introducing air, causing the target minerals to adhere to the surface of bubbles and form a foam product. However, the foam product produced after flotation presents several problems. The presence of a large amount of foam increases the difficulty of subsequent processing, such as in concentration and filtration, where foam interferes with solid-liquid separation, reduces equipment efficiency, and increases energy consumption. Furthermore, the expansion of foam occupies significant space, affecting transportation and storage, and may even cause foam to overflow from the equipment, resulting in material loss and environmental pollution. Simultaneously, excessively high foam stability makes it difficult to remove trapped water, affecting product quality and grade. Therefore, defoaming devices are needed to defoam the foam product produced by the flotation machine.

[0003] In the prior art, utility model patent CN201620109033.4 discloses a defoaming device for flotation minerals, including a tank integrating a front buffer and a rear defoaming section. The front and rear sections of the tank are separated by a partition with a height less than the height of the tank body, forming a buffer tank and a defoaming tank. A stirring and pushing mechanism is arranged in the defoaming tank to push the flotation foam product backward. A power device is connected to the outer end of the stirring and pushing mechanism. The flotation product enters the buffer tank of the tank body through the feed pipe. Some bubbles burst in the buffer tank, while the unburdened bubbles enter the defoaming tank and burst under the stirring, shearing, and squeezing action of the spiral stirring and pushing mechanism. Slurry discharge pipes are respectively installed at the bottom of the rear end of the buffer tank and the defoaming tank. After the action of the spiral stirring and pushing mechanism in the defoaming tank, the bubbles in the flotation product are basically eliminated, avoiding cavitation of the conveying pump during subsequent slurry transportation and extending the service life of the conveying pump.

[0004] The aforementioned patent provides a device for defoaming foam products from flotation machines. This defoaming device uses a spiral stirring and pushing mechanism to defoam the foam products from the flotation machine. In reality, foam products not only contain larger foams, but the liquid may also contain tiny foams. While this defoaming device can break down larger foams through spiral stirring, its defoaming effect on tiny foams is not good and needs further improvement. Utility Model Content

[0005] The purpose of this invention is to provide a defoaming device for flotation machines, which aims to improve the problem that existing defoaming devices are not effective at defoaming micro-foams.

[0006] This utility model is implemented as follows: A defoaming device for a flotation machine includes a receiving tank and a defoaming tube. The defoaming tube is a tube structure with openings at both ends, and the lower end of the defoaming tube is located in the receiving tank. A top cover is provided at the upper end of the defoaming tube, and the lower end of the top cover extends into the defoaming tube to provide a perforated plate. A rotating shaft is rotatably provided in the top cover. The upper end of the rotating shaft extends above the top cover and is connected to a motor, and the lower end extends below the perforated plate. A shearing assembly, a fan blade assembly, and a centrifugal disc are installed sequentially from top to bottom. The shearing assembly abuts against the lower end face of the perforated plate, and the centrifugal disc extends below the lower end of the defoaming tube and completely covers the lower end of the defoaming tube.

[0007] Preferably, the receiving bucket includes a discharge port and a settling slot. The upper end of the receiving bucket has a settling slot. A settling platform is fixedly installed on the outer tube of the defoaming pipe. The defoaming pipe is set in the settling slot through the settling platform. The side of the receiving bucket has a discharge port at a position lower than the centrifugal disc.

[0008] Preferably, the defoaming tube includes a foam product inlet, and the foam product inlet is provided on the side of the defoaming tube at a position higher than the perforated plate.

[0009] Preferably, the upper cover further includes a cover plate, the lower end of the cover plate is provided with a mounting post, the lower end of the mounting post is provided with a perforated plate, the upper cover is provided with a shaft hole that passes through the cover plate, the mounting post and the perforated plate, and the rotating shaft is rotatably installed in the shaft hole.

[0010] Preferably, the defoaming tube further includes a mounting flange and a limiting platform. The upper end face of the defoaming tube is provided with a mounting flange, and the inner wall of the defoaming tube is provided with a limiting platform. The cover plate is installed on the mounting flange, and the lower end face of the perforated plate abuts against the limiting platform.

[0011] Preferably, it also includes a sealing gasket, and a plurality of first mounting bolts are sequentially arranged along the circumference of the area of ​​the cover plate corresponding to the mounting flange. The cover plate is installed on the mounting flange by means of the sealing gasket and is fixedly installed by means of the first mounting bolts.

[0012] Preferably, the shearing assembly includes shearing rods, and a plurality of shearing rods are sequentially arranged on the outer ring surface of the shearing assembly along its circumferential direction, with the plurality of shearing rods radiating from the center to cover the entire lower end surface of the perforation plate.

[0013] Preferably, the device also includes a mounting bracket, on which the upper end face of the cover is fixedly provided. The motor is mounted on the mounting bracket, and the output shaft of the motor is connected to the upper end of the rotating shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model performs multi-step defoaming of foam products by sequentially arranging a shearing component, a fan blade component, and a centrifugal disc on a rotating shaft. The centrifugal disc at the bottom layer can perform high-speed centrifugal defoaming without missing any incoming liquid, resulting in better defoaming effect.

[0016] 2. This utility model, by setting a fan blade assembly on the rotating shaft, drives the airflow as the fan blade assembly rotates, which can suck in the foam product entering the defoaming tube and prevent some foam from floating out. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the material receiving bucket of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the defoaming tube of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the defoaming tube of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the top cover of this utility model;

[0023] Figure 7 This is a schematic diagram of the installation structure of the rotating shaft, shearing assembly, fan blade assembly and centrifugal disc of this utility model.

[0024] In the diagram: 1. Receiving bucket; 101. Discharge port; 102. Settling trough; 2. Defoaming pipe; 201. Foam product inlet; 202. Mounting flange; 203. Sealing gasket; 204. Settling platform; 205. Limiting platform; 3. Top cover; 301. Cover plate; 302. Mounting bolt; 303. Mounting bracket; 304. Mounting column; 305. Perforated plate; 306. Shaft hole; 4. Motor; 5. Rotating shaft; 6. Shearing assembly; 601. Shearing rod; 7. Fan blade assembly; 8. Centrifugal disc. Detailed implementation method:

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0027] Example 1

[0028] like Figures 1-4 As shown, a defoaming device for a flotation machine includes a receiving tank 1 and a defoaming pipe 2. The defoaming pipe 2 is a pipe structure with openings at both ends, and the lower end of the defoaming pipe 2 is placed in the receiving tank 1. The receiving tank 1 includes a discharge port 101 and a placement slot 102. The upper end of the receiving tank 1 has a placement slot 102. A placement platform 204 is fixedly installed on the outer side of the defoaming pipe 2, and the defoaming pipe 2 is placed in the placement slot 102 through the placement platform 204. The discharge port 101 is provided on the side of the receiving tank 1 at a position lower than the centrifugal disc 8.

[0029] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the upper end of the defoaming tube 2 is provided with a top cover 3, and the lower end of the top cover 3 extends into the interior of the defoaming tube 2 and is provided with a perforated plate 305. A rotating shaft 5 is rotatably provided in the top cover 3. The top cover 3 also includes a cover plate 301, and the lower end of the cover plate 301 is provided with a mounting post 304. The lower end of the mounting post 304 is provided with the perforated plate 305. The top cover 3 is provided with a shaft hole 306 that penetrates the cover plate 301, the mounting post 304, and the perforated plate 305. The rotating shaft 5 is rotatably installed in the shaft hole 306. The defoaming tube 2 also includes a mounting flange 202 and a limiting platform 205. The upper end face of the defoaming tube 2 is provided with the mounting flange 202, and the inner wall of the defoaming tube 2 is provided with the limiting platform 205. The cover plate 301 is installed on the mounting flange 202, and the lower end face of the perforated plate 305 abuts against the limiting platform 205. Additionally, a sealing gasket 203 is included. Multiple first mounting bolts 302 are sequentially arranged along the circumference of the area on the cover plate 301 corresponding to the mounting flange 202. The cover plate 301 is installed on the mounting flange 202 through the sealing gasket 203 and is fixedly installed by the first mounting bolts 302.

[0030] like Figure 2 , Figure 6 and Figure 7As shown, the defoaming tube 2 includes a foam product inlet 201, which is located on the side of the defoaming tube 2 above the perforation plate 305. The upper end of the rotating shaft 5 extends above the upper cover 3 and is connected to a motor 4, while the lower end extends below the perforation plate 305. From top to bottom, a shearing assembly 6, a fan blade assembly 7, and a centrifugal disc 8 are sequentially installed. The shearing assembly 6 abuts against the lower end face of the perforation plate 305, and the centrifugal disc 8 extends below the lower port of the defoaming tube 2, completely covering it. The centrifugal disc 8 is larger than the lower port of the defoaming tube 2, allowing it to accurately catch the liquid flowing out from the lower port. Additionally, a mounting bracket 303 is included. The mounting bracket 303 is fixedly installed on the upper end face of the upper cover 3, and the motor 4 is mounted on the mounting bracket 303. The output shaft of the motor 4 is connected to the upper end of the rotating shaft 5. The shearing assembly 6 includes shearing rods 601. Multiple shearing rods 601 are arranged sequentially along the circumference of the outer ring surface of the shearing assembly 6, radiating from the center and covering the entire lower end face of the perforated plate 305. Foam enters the defoaming tube 2 through the foam product inlet 201. The high-speed fan blade assembly 7 generates airflow, driving the foam product through the perforated plate 305. When the foam passes through the perforated plate 305, the shearing force provided by the high-speed rotating shearing assembly 6 tears the bubbles. Part of the liquid released by the bubbles is thrown against the wall of the defoaming tube 2 by the centrifugal force of the rotating shearing assembly 6, and the other part falls downwards. At the same time, since both the shearing assembly 6 and the fan blade assembly 7 are inside the defoaming tube 2, the liquid thrown out by the high-speed rotation of the shearing assembly 6 and the fan blade assembly 7, as well as the freely falling liquid, will flow onto the centrifugal disc 8. Then, the high-speed rotating centrifugal disc 8 will throw the liquid onto the wall of the receiving tank 1 at high speed, thereby defoaming. The shearing force and pressure difference generated by the high-speed rotation will disrupt the mechanical balance of the bubble film, causing the bubbles to rupture and release gas. The density difference causes the liquid to be thrown against the wall of receiving tank 1, forming a liquid layer, thereby achieving complete defoaming.

[0031] Example 2

[0032] like Figures 1-4 As shown, a defoaming device for a flotation machine includes a receiving tank 1 and a defoaming pipe 2. The defoaming pipe 2 is a pipe structure with openings at both ends, and the lower end of the defoaming pipe 2 is placed in the receiving tank 1. The receiving tank 1 includes a discharge port 101 and a placement slot 102. The upper end of the receiving tank 1 has a placement slot 102. A placement platform 204 is fixedly installed on the outer side of the defoaming pipe 2, and the defoaming pipe 2 is placed in the placement slot 102 through the placement platform 204. The discharge port 101 is provided on the side of the receiving tank 1 at a position lower than the centrifugal disc 8.

[0033] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the upper end of the defoaming tube 2 is provided with a top cover 3, and the lower end of the top cover 3 extends into the interior of the defoaming tube 2 and is provided with a perforated plate 305. A rotating shaft 5 is rotatably provided in the top cover 3. The top cover 3 also includes a cover plate 301, and the lower end of the cover plate 301 is provided with a mounting post 304. The lower end of the mounting post 304 is provided with the perforated plate 305. The top cover 3 is provided with a shaft hole 306 that penetrates the cover plate 301, the mounting post 304, and the perforated plate 305. The rotating shaft 5 is rotatably installed in the shaft hole 306. The defoaming tube 2 also includes a mounting flange 202 and a limiting platform 205. The upper end face of the defoaming tube 2 is provided with the mounting flange 202, and the inner wall of the defoaming tube 2 is provided with the limiting platform 205. The cover plate 301 is installed on the mounting flange 202, and the lower end face of the perforated plate 305 abuts against the limiting platform 205. Additionally, a sealing gasket 203 is included. Multiple first mounting bolts 302 are sequentially arranged along the circumference of the area on the cover plate 301 corresponding to the mounting flange 202. The cover plate 301 is installed on the mounting flange 202 through the sealing gasket 203 and is fixedly installed by the first mounting bolts 302.

[0034] like Figure 2 , Figure 6 and Figure 7 As shown, the defoaming tube 2 includes a foam product inlet 201, which is located on the side of the defoaming tube 2 above the perforation plate 305. The upper end of the rotating shaft 5 extends above the upper cover 3 and is connected to a motor 4, while the lower end extends below the perforation plate 305. From top to bottom, a shearing assembly 6, a fan blade assembly 7, and a centrifugal disc 8 are sequentially installed. The shearing assembly 6 abuts against the lower end face of the perforation plate 305, and the centrifugal disc 8 extends below the lower port of the defoaming tube 2, completely covering the lower port of the defoaming tube 2. Additionally, a mounting bracket 303 is included. The mounting bracket 303 is fixedly installed on the upper end face of the upper cover 3, and the motor 4 is mounted on the mounting bracket 303. The output shaft of the motor 4 is connected to the upper end of the rotating shaft 5. The shearing assembly 6 includes shearing rods 601. Multiple shearing rods 601 are sequentially arranged along the circumference of the outer ring surface of the shearing assembly 6, radiating from the center and covering the entire lower end face of the perforation plate 305.

[0035] The working principle of this invention is as follows: During use, foam enters the defoaming tube 2 through the foam product inlet 201. The high-speed fan blade assembly 7 generates airflow, driving the foam product through the perforated plate 305. When the foam passes through the perforated plate 305, the shearing force provided by the high-speed rotating shearing assembly 6 tears the bubbles. Part of the liquid released from the bubbles is thrown against the wall of the defoaming tube 2 by the centrifugal force of the rotating shearing assembly 6, while the other part falls downwards. Since both the shearing assembly 6 and the fan blade assembly 7 are inside the defoaming tube 2, the liquid thrown out by the high-speed rotation of the shearing assembly 6 and the fan blade assembly 7, as well as the freely falling liquid, flows onto the centrifugal disc 8. Then, the high-speed rotating centrifugal disc 8 throws the liquid onto the wall of the receiving tank 1, thus defoaming. The shearing force and pressure difference generated by the high-speed rotation disrupt the mechanical balance of the bubble film, causing the bubbles to burst and release gas. The density difference causes the liquid to be thrown against the wall of the receiving tank 1, forming a liquid layer, thereby achieving complete defoaming.

[0036] In summary, this utility model performs multi-step defoaming of foam products by sequentially arranging a shearing component 6, a fan blade component 7, and a centrifugal disc 8 on a rotating shaft 5. The centrifugal disc 8, located at the bottom, can perform high-speed centrifugal defoaming without missing any incoming liquid, resulting in better defoaming effect. By arranging the fan blade component 7 on the rotating shaft 5, the rotation of the fan blade component 7 drives the airflow, which can draw in the foam products entering the defoaming tube 2, preventing some foam from drifting out.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A defoaming device for a flotation machine, comprising a receiving bucket (1), characterized in that, It also includes a defoaming tube (2), which is a tube structure with open ends. The lower end of the defoaming tube (2) is located in the receiving bucket (1). The upper end of the defoaming tube (2) is provided with a cover (3). The lower end of the cover (3) extends into the defoaming tube (2) and is provided with a perforated plate (305). A rotating shaft (5) is rotatably provided in the cover (3). The upper end of the rotating shaft (5) extends above the cover (3) and is connected to a motor (4). The lower end extends below the perforated plate (305). A shearing assembly (6), a fan blade assembly (7), and a centrifugal disc (8) are installed from top to bottom. The shearing assembly (6) abuts against the lower end face of the perforated plate (305). The centrifugal disc (8) extends below the lower end of the defoaming tube (2) and completely covers the lower end of the defoaming tube (2).

2. The defoaming device for a flotation machine according to claim 1, characterized in that, The receiving bucket (1) includes a discharge port (101) and a settling slot (102). The upper end of the receiving bucket (1) is provided with a settling slot (102). A settling platform (204) is fixedly installed on the outer tube of the defoaming pipe (2). The defoaming pipe (2) is set in the settling slot (102) through the settling platform (204). The side of the receiving bucket (1) is provided with a discharge port (101) at a position lower than the centrifugal disc (8).

3. A defoaming device for a flotation machine according to claim 1, characterized in that The defoaming tube (2) includes a foam product inlet (201), and the foam product inlet (201) is provided on the side of the defoaming tube (2) at a position higher than the perforated plate (305).

4. A defoaming device for a flotation machine according to claim 1, characterized in that The upper cover (3) also includes a cover plate (301), the lower end of the cover plate (301) is provided with a mounting post (304), the lower end of the mounting post (304) is provided with a perforated plate (305), the upper cover (3) is provided with a shaft hole (306) that penetrates the cover plate (301), the mounting post (304) and the perforated plate (305), and the rotating shaft (5) is rotatably installed in the shaft hole (306).

5. A defoaming device for a flotation machine according to claim 4, characterized in that The defoaming pipe (2) also includes a mounting flange (202) and a limiting platform (205). The upper end face of the defoaming pipe (2) is provided with the mounting flange (202), and the inner wall of the defoaming pipe (2) is provided with the limiting platform (205). The cover plate (301) is installed on the mounting flange (202), and the lower end face of the perforated plate (305) abuts against the limiting platform (205).

6. A defoaming device for a flotation machine according to claim 5, characterized in that It also includes a sealing gasket (203). Multiple first mounting bolts (302) are sequentially arranged along the circumference of the area on the cover plate (301) corresponding to the mounting flange (202). The cover plate (301) is installed on the mounting flange (202) through the sealing gasket (203) and fixedly installed by the first mounting bolts (302).

7. A defoaming device for a flotation machine according to claim 1, characterized in that The shearing assembly (6) includes shearing rods (601). Multiple shearing rods (601) are arranged sequentially along the circumferential direction on the outer ring surface of the shearing assembly (6). The multiple shearing rods (601) radiate from the center and cover the lower end face of the entire perforated plate (305).

8. A defoaming device for a flotation machine according to claim 1, characterized in that Further comprising a mounting rack (303), the upper end surface of the upper cover (3) is fixedly provided with the mounting rack (303), the motor (4) is mounted on the mounting rack (303), and the output shaft of the motor (4) is connected with the upper end of the rotating shaft (5).

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