Rotary disc type automatic extrusion defoaming machine
By designing a rotary automatic extrusion defoamer, and utilizing the combination of an extrusion plate and a bubble-blocking net, the problem of difficult-to-eliminate foam layers in thickeners is solved, achieving continuous physical defoaming and unaffected production control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KUNMING UNIV OF SCI & TECH
- Filing Date
- 2023-05-20
- Publication Date
- 2026-06-12
AI Technical Summary
In the current mineral processing technology, it is difficult to eliminate the foam layer in the thickener, which affects the thickening effect and leads to concentrate loss. Furthermore, defoamers and spraying methods have negative impacts on the slurry and downstream production.
The rotary automatic extrusion defoamer uses a rotary box and a defoaming box design. Through the cooperation of the extrusion plate and the bubble-blocking net, it can scrape, extrude and defoam the foam, avoiding the use of defoaming agents and water spraying.
It achieves physical defoaming without the need for additional chemicals. The defoaming process is continuous and does not affect the pulp thickening effect or downstream production, thus improving continuous production control.
Smart Images
Figure CN116459561B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of defoaming technology, specifically, it relates to a rotary automatic extrusion defoaming machine. Background Technology
[0002] In mineral processing, thickeners are typically used to thicken flotation concentrates. Because the pulp contains a high concentration of frothers, the resulting foam is stable and difficult to break, gradually accumulating and solidifying after losing some water to form a sponge-like floating foam layer. This layer has a long natural defoaming time and is typically 100mm-500mm thick. The foam layer contains a large amount of concentrate; if left untreated, it will affect the thickening effect and cause concentrate loss. In winter, the floating foam layer freezes, further deteriorating the thickener's thickening performance.
[0003] Currently, mineral processing plants primarily handle thickener foam using two methods: spraying and adding defoaming agents. Spraying involves spraying water above the thickener, relying on the impact of water droplets or streams to eliminate foam. However, this method has poor defoaming effectiveness, especially for viscous foam, and it can reduce the density of the slurry. Defoaming agents are sprayed above the thickener to alter the surface tension of the foam, causing it to collapse. However, the defoaming agents used in this method can significantly impact subsequent slurry production, even causing other foaming agents in later processes to become ineffective, thus significantly affecting production. Therefore, both spraying and defoaming methods can have a significant impact on slurry thickening and downstream slurry production. Summary of the Invention
[0004] In order to overcome the problems existing in the background technology, the present invention provides a rotary automatic extrusion defoamer, which can effectively defoam the foam layer without affecting the slurry thickening effect or the downstream production of the slurry.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:
[0006] The rotary automatic extrusion defoaming machine includes a defoaming box, a rotary box, and a motor; the rotary box is disc-shaped, and the defoaming box is fixed along the outer circumference of the rotary box.
[0007] The defoaming chamber includes a top plate, an extrusion plate, a baffle, and two side panels. The top plate is parallel to the tangent of the turntable box. The baffle and side panels are of the same length and are connected between the top plate and the turntable box. The baffle is in the same direction as the extension of the normal line of the turntable box. The two side panels are opposite each other and fixed to both sides of the baffle, forming a box structure with one open side facing the baffle. All open sides of the defoaming chamber are in the same direction. The inner sides of both side panels are provided with sliding grooves, and the extrusion plate is slidably connected to the side panels through the sliding grooves. The turntable box is connected to a motor drive, and the motor drives the turntable box to rotate.
[0008] Furthermore, the turntable box is equipped with a partition that divides it into multiple fan-shaped slurry collection chambers. Each defoaming box corresponds to one slurry collection chamber, and the slurry collection chambers and defoaming boxes are connected one by one. A bubble-blocking net is provided between the defoaming box and the slurry collection chamber.
[0009] Furthermore, each slurry collection chamber is equipped with a slurry discharge pipe at its inner end. All slurry discharge pipes are located on the same side of the turntable box. On the same side of the slurry discharge pipes, there is also a slurry guide chute fixed below the slurry outlet. The slurry discharged from the slurry collection chamber is transported away through the slurry guide chute.
[0010] Furthermore, the rotary automatic extrusion defoamer is fixed above the slurry thickening tank by a bracket; a foam scraper is provided on the upper part of the thickening tank.
[0011] Furthermore, the inner walls of the baffle and the two surrounding plates are provided with sliding grooves, and the side wall of the extrusion plate is provided with a slider that matches the sliding groove. The extrusion plate is slidably connected to the baffle and the two surrounding plates through the sliding groove and the slider.
[0012] Furthermore, the open surface of the defoaming box is located at the front end of the turntable box in the direction of rotation.
[0013] Furthermore, the rotary automatic extrusion defoamer is used in eliminating surface foam.
[0014] Furthermore, the rotary automatic extrusion defoamer is used in eliminating surface foam in mineral slurry thickening tanks.
[0015] The beneficial effects of this invention are:
[0016] This invention uses physical methods for defoaming, which completely solves the problem of the impact of defoaming methods such as using defoaming agents or water spraying on slurry processing and downstream processes. Moreover, the defoaming process is continuous and less prone to index fluctuations, which is more conducive to the continuous control of slurry processing. Attached Figure Description
[0017] Figure 1 This is a top view of the present invention;
[0018] Figure 2 This is a perspective view of the present invention;
[0019] Figure 3 This is a schematic diagram of the defoaming box structure of the present invention;
[0020] Figure 4 This is a cross-sectional view of the defoaming box and turntable box of the present invention;
[0021] Figure 5 This is a schematic diagram of the enclosure and baffle structure of the present invention;
[0022] In the diagram, 1-defoaming box, 11-top plate, 12-extrusion plate, 13-baffle, 14-enclosing plate, 15-slide groove, 16-slider;
[0023] 2-Turntable box, 21-Baffle plate, 22-Slurry collection chamber, 23-Slurry discharge pipe;
[0024] 3-Motor, 4-Bubble screen, 5-Slurry guide chute, 6-Slurry thickening trough, 7-Bubble scraper, 8-Support; 10-Rotating shaft. Detailed Implementation
[0025] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are all within the scope of protection of this invention.
[0026] To illustrate the present invention more clearly, the following embodiments will be described in detail. Example 1
[0027] A rotary automatic extrusion defoamer includes a defoaming box 1, a rotary box 2, and a motor 3. The rotary box 2 is disc-shaped and has multiple partitions 21 inside, dividing the rotary box 2 into multiple fan-shaped slurry collection chambers 22. The defoaming box 1 is fixed along the outer circumference of the rotary box 2. Each slurry collection chamber 22 is equipped with a corresponding defoaming box 1. A mesh structure bubble-blocking net 4 is provided between the defoaming box 1 and the slurry collection chamber 22.
[0028] The defoaming box 1 includes a top plate 11, an extrusion plate 12, a baffle 13, and two side panels 14. The top plate 11 is parallel to the tangent of the turntable box 2. The baffle 13 and the side panels 14 are of the same length and are both connected between the top plate 11 and the turntable box 2. The baffle 13 is in the same direction as the extension of the normal line of the turntable box 2. The two side panels 14 are opposite each other and fixed to both sides of the baffle 13, forming a box structure with one side open (e.g., Figure 3 and Figure 4 (As shown). The open surface is opposite to the baffle 13, and the open surfaces of all defoaming boxes 1 face the same direction (e.g., Figure 3 This allows all defoaming boxes 1 to scrape and squeeze out foam as the turntable box 2 rotates. The inner walls of the baffle 13 and the two side panels 14 are provided with grooves 15 (or only the two side panels 14 may have grooves 15). The side wall of the extrusion plate 12 is provided with a slider 16 that matches the groove 15. The extrusion plate 12 is slidably connected to the baffle 13 and the two side panels 14 through the groove 15 and the slider 16.
[0029] The turntable box 2 rotates clockwise or counterclockwise under the drive of the motor 3. Regardless of whether the turntable box 2 rotates clockwise or counterclockwise, it must be ensured that the open surface of the defoaming box 1 is located at the front end of the rotation direction of the turntable box 2 (as shown in the attached diagram). Figure 4 During the rotation of the turntable box 2, the foam floating in the slurry thickening tank 6 enters the defoaming box 1 through the open surface of the defoaming box 1. The rotation of the turntable box 2 drives the defoaming box 1 to rotate synchronously. During the rotation of the defoaming box 1, the extrusion plate 12 slides along the slide groove 15 and compresses with the foam-blocking net 4, defoaming the foam that has entered the defoaming box 1. The defoamed slurry enters the slurry collection chamber 22 through the gaps on the foam-blocking net 4 and continues to defoam as the turntable box 2 rotates. Because the slurry foam has a high viscosity, it will not enter the slurry collection chamber 22 from the foam-blocking net 4. The defoaming effect of this invention is mainly generated by the mutual compression of the foam-blocking net 4 and the extrusion plate 12. Through the mesh structure of the foam-blocking net 4, the mesh on the foam-blocking net 4 cuts the foam during compression, resulting in a better defoaming effect. Furthermore, after defoaming, the mesh structure of the foam-blocking net 4 allows the defoamed slurry to enter the slurry collection chamber 22 through the mesh, while simultaneously intercepting any undefoamed foam, preventing it from entering the slurry collection chamber 22 without defoaming. The turntable structure of the turntable box 2 in this invention, combined with the structure and position of the defoaming box 1, and the placement of the foam-blocking net 4 between the defoaming box 1 and the slurry collection chamber 22, allows for the simultaneous scraping, squeezing, defoaming, and collection of foam as the turntable box 2 rotates. This eliminates the need for water or defoaming agents, achieving excellent defoaming results through material-based methods, completely resolving the impact of existing defoaming technologies on the slurry and subsequent processing.
[0030] The technical solution of this invention fully utilizes the physical property of high foam viscosity. During the rotation of the turntable box 2, although the bubble-blocking net 4 between the defoaming box 1 and the slurry collection chamber 22 has pores, foam will not enter the slurry collection chamber 22 before being squeezed. Furthermore, the sliding connection structure between the squeezing plate 12, the surrounding plate 14, and the baffle 13 allows the squeezing plate 12 to slide along the chute 15 during the rotation of the turntable box 2, automatically squeezing and breaking the foam. The structure of this invention, combined with the physical properties of the slurry, enables the foam to be scraped, broken, and the slurry to be guided away after breaking during the rotation of the turntable box 2, with the entire foam-breaking process proceeding continuously.
[0031] Each slurry collection chamber 22 has a slurry discharge pipe 23 at its inner end (facing the axis of the turntable box 2). All slurry discharge pipes 23 are located on the same side of the turntable box 2. A guide chute 5, fixed below the slurry discharge pipe 23, is also provided on the same side of the slurry discharge pipe 23. The slurry entering the slurry collection chamber 22 flows through the slurry discharge pipe 23 into the guide chute 5 and is then sent to the downstream process of slurry processing or returned to the slurry thickening tank. In this invention, the slurry discharge pipe 23 has two functions: first, to guide the slurry out of the slurry collection chamber 22; and second, to pour the guided slurry directly into the guide chute 5. The structure for guiding the slurry from the slurry collection chamber 22 into the guide chute 5 is not limited to the slurry discharge pipe 23; any structure that can achieve this function is within the scope of protection of this invention.
[0032] The rotary automatic extrusion defoamer is fixed above the slurry thickening tank 6 by a bracket 8. The fixing position must ensure that the lowest defoaming box 1 on the rotary box 2 can scrape foam from the foam layer, while the lowest defoaming box 1 must not be submerged below the foam layer to prevent scraping slurry without collecting foam. This position can be adjusted by controlling the liquid level in the slurry thickening tank 6. Alternatively, the bracket 8 can be designed with a lifting function. Since lifting-function brackets are a mature technology, this invention will not elaborate further.
[0033] As a preferred embodiment, the rotary automatic extrusion defoamer of the present invention is used in conjunction with a foam scraper 7 disposed on the upper part of the slurry thickening tank. Specifically, the foam scraper 7 is disposed on the slurry thickening tank, which increases the thickness of the foam layer and makes it easier for the defoaming box 1 to scrape off the foam. As a more preferred embodiment, two foam scrapers 7 are disposed, and the two foam scrapers move relative to each other to increase the thickness of the foam layer. The foam scraper 7 is fixed by a bracket, which is fixed to the top wall of the slurry thickening tank 6. Since fixing the plate to the top of the tank is a conventional structure, for example, referring to the fixing and rotation adjustment of the weir on a rotary filter, the structure of the bracket will not be described in detail in the present invention.
[0034] The turntable box 2 has a rotating shaft at its center. The turntable box 2 rotates under the transmission of the motor 3. Since the rotation of the turntable by the motor is a conventional structure and this structure is not an innovative structure of this invention, this invention does not describe in detail the connection relationship between the turntable box 2 and the motor 3. Any mechanical structure that can drive the turntable box 2 to rotate cannot escape the protection scope of this invention.
[0035] This invention uses a physical method for defoaming, completely eliminating the impact of defoaming agents or water spraying on slurry processing and downstream processes. By placing the defoaming method at the top of the slurry thickening tank, it does not require additional plant space, and the rotary table structure allows for continuous defoaming, which is more conducive to continuous slurry production control. This defoaming method can be applied not only to slurry thickening tanks but also to any equipment requiring defoaming, and is particularly suitable for defoaming tanks where the foam layer floats on the liquid surface.
[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.
Claims
1. A rotary automatic extrusion defoaming machine, characterized in that, It includes a defoaming box (1), a turntable box (2), and a motor (3); the turntable box (2) is disc-shaped, and the defoaming box (1) is fixed along the outer circumference of the turntable box (2); The defoaming box (1) includes a top plate (11), an extrusion plate (12), a baffle (13), and two side plates (14). The top plate (11) is parallel to the tangent of the turntable box (2). The baffle (13) and the side plates (14) are of the same length and are connected between the top plate (11) and the turntable box (2). The baffle (13) is in the same direction as the extension of the normal line of the turntable box (2). The two side plates (14) are opposite to each other and are fixed on both sides of the baffle (13) to form a box structure with one side open. The open side is opposite to the baffle (13). All the open sides of the defoaming boxes (1) are in the same direction. The open side of the defoaming box (1) is located at the front end of the turntable box (2) in the direction of rotation. The turntable box (2) is provided with a partition (21) that divides it into multiple fan-shaped slurry collection chambers (22). Each defoaming box (1) corresponds to one slurry collection chamber (22). A bubble-blocking net (4) is provided between the defoaming box (1) and the slurry collection chamber (22). The extrusion plate (12) is slidably connected to the surrounding plate (14); The turntable box (2) is connected to the motor (3) for transmission, and the motor (3) drives the turntable box (2) to rotate.
2. The rotary automatic extrusion defoamer according to claim 1, characterized in that, Each slurry collection chamber (22) is equipped with a slurry discharge pipe (23) at its inner end. All slurry discharge pipes (23) are located on the same side of the turntable box (2). On the same side of the slurry discharge pipe (23), there is also a slurry guide chute (5) fixed below the slurry outlet. The slurry discharged from the slurry collection chamber (22) is guided away through the slurry guide chute (5).
3. The rotary automatic extrusion defoamer according to claim 1 or 2, characterized in that, The rotary automatic extrusion defoamer is fixed above the slurry thickening tank (6) by a bracket; the upper part of the slurry thickening tank (6) is provided with a foam scraper (7).
4. The rotary automatic extrusion defoamer according to claim 1, characterized in that, The inner walls of the baffle (13) and the two surrounding plates (14) are provided with grooves (15), and the side wall of the extrusion plate (12) is provided with a slider (16) that matches the groove (15). The extrusion plate (12) is slidably connected to the baffle (13) and the two surrounding plates (14) through the groove (15) and the slider (16).
5. The application of the rotary automatic extrusion defoamer according to any one of claims 1-4 in eliminating surface foam.
6. The application of the rotary automatic extrusion defoamer according to any one of claims 1-4 in eliminating foam in mineral slurry thickening tanks.