Ultra-stable mineralized foam elimination device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2026-08-14
AI Technical Summary
[0006]本实用新型提供了一种超稳矿化泡沫消除装置，以解决现有消泡处理方式存在的部分超稳矿化泡沫随浓密机溢流水流失、需要消耗大量清水、且对超稳泡沫消泡效率不高、由于矿粒较细导致颗粒消泡之后回到浓密机中沉降速度较慢进而部分漂浮在液面随溢流水流出而流失的技术问题
[0019]本实用新型装置，通过若干气嘴吹气使浓密机处理池内的矿化泡沫归集至浓密机处理池的中心位置，以远离浓密机处理池外周布设的溢流，不仅有利于刮板机构高效捕获超稳泡沫，同时还避免矿化泡沫被浓密机处理池的外周溢流带走流失；本新型装置中，利用消泡筛和风力结合进行消泡，将超稳泡沫转变为矿浆，不仅消泡效率高、消泡质量好，同时消泡过程中不用消耗清水，降低处理成本，并还使形成的矿浆具有较高的浓度，以利于后续的絮凝沉淀；本新型装置中，针对超稳泡沫粒径小、不容易沉降等特性，将消泡后的超稳泡沫添加合适类型的絮凝剂，使得超稳泡沫高效沉降絮凝而不易随浓密机处理池内溢流而流失，避免传统清水消泡或者机械消泡后矿浆未处理而直接返回至浓密机，部分较细的矿物颗粒随着浓密机溢流水流走。
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Figure CN224629123U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foam elimination technology, and in particular, to an ultra-stable mineralized foam elimination device. Background Technology
[0002] Flotation relies on the difference in hydrophobicity between valuable minerals and gangue minerals. Collectors are added to capture the valuable minerals, and then frothers are used to form stable mineralized froth, thereby separating the valuable and gangue minerals. In actual production, it has been found that some sulfide ores have relatively good floatability in their flotation concentrates. After reacting with collectors and frothers, they form stable mineralized froth, especially minerals with good floatability and fine particle size, which form ultra-stable mineralized froth. This ultra-stable mineralized froth does not easily settle in the thickener, and some of it is lost with the thickener overflow.
[0003] Currently, the existing defoaming technologies for mineralized foam mainly include chemical defoaming and physical defoaming. Chemical defoaming involves spraying defoaming agents above the thickener. This method has some effect, but it is less effective for ultra-stable foam. The agents can also be recycled back into the flotation process with the return water, affecting the flotation separation.
[0004] Physical defoaming methods mainly include water flushing and mechanical defoaming. Water flushing requires a large amount of clean water and is not very efficient for defoaming ultra-stable foam. Since ultra-stable foam particles are very fine, with a significant portion of the particles smaller than 600 mesh, the mineral particles are usually discharged back into the thickener after mechanical defoaming. Furthermore, due to the fineness of the mineral particles, the settling speed of the particles after defoaming is slow, and some float on the liquid surface and are lost with the overflow water.
[0005] Therefore, for some ultra-stable foams with finer particles and better floatability, it is necessary not only to defoam them, but also to prevent fine particles from being suspended in the thickener and carried away by the overflow water. Utility Model Content
[0006] This invention provides an ultra-stable mineralized foam elimination device to solve the technical problems of existing defoaming treatment methods, such as the loss of some ultra-stable mineralized foam with the overflow water of the thickener, the need to consume a large amount of clean water, the low defoaming efficiency of ultra-stable foam, and the slow settling speed of particles after defoaming in the thickener due to the fine mineral particles, resulting in some of them floating on the liquid surface and being lost with the overflow water.
[0007] The technical solution adopted in this utility model is as follows:
[0008] A super-stable mineralized foam elimination device includes: a thickener treatment tank, and a plurality of air nozzles arranged at intervals along the circumference of the thickener treatment tank, the air nozzles being used to blow air into the thickener treatment tank to concentrate the mineralized foam in the thickener treatment tank towards the center; a thickener bridge is erected above the thickener treatment tank, the thickener bridge being equipped with a scraper mechanism, a blowing and screening defoaming device, and a flocculation and stirring slurry discharge device, the scraper mechanism being used to scrape the mineralized foam in the center of the thickener treatment tank into the blowing and screening defoaming device. Inside; the blowing and screening defoaming device is used to blow air through the mineralized foam entering it, so that the mineralized foam is defoamed after passing through the defoaming screens installed inside to form a slurry. The blowing and screening defoaming device is also connected to the flocculation and stirring slurry discharge device, so that the slurry formed after defoaming enters the flocculation and stirring slurry discharge device. The flocculation and stirring slurry discharge device is used to drip flocculate and stir the slurry entering it. The flocculation and stirring slurry discharge device is also connected to the thickener treatment tank, so that the flocculated slurry formed after flocculation is returned to the thickener treatment tank.
[0009] Furthermore, several air nozzles are evenly spaced along the circumference of the thickener treatment tank; the air jet direction of each air nozzle has an air jet angle of 30° to 90° with the circumferential tangent of the thickener treatment tank, so as to blow the mineralized foam in the thickener treatment tank to move circumferentially and move closer to the center.
[0010] Furthermore, the scraper mechanism includes a scraper motor mounted on the thickener bridge and a scraper connected to the scraper motor; the scraper is used to rotate under the action of the scraper motor, thereby scraping the mineralized foam in the middle of the thickener treatment tank into the blower sieving and defoaming device.
[0011] Furthermore, the blowing and screening defoaming device also includes a defoaming tank suspended below the thickener bridge and a blower fixed on the thickener bridge for blowing air into the defoaming tank; the defoaming screen is arranged in the defoaming tank and divides the inner cavity of the defoaming tank into a foam chamber and a slurry outlet chamber arranged in sequence from top to bottom. The slurry outlet chamber is connected to the flocculation and stirring slurry outlet device so that the slurry formed after passing through the defoaming screen enters the flocculation and stirring slurry outlet device.
[0012] Furthermore, the defoaming tank includes a tank body and an overflow pipe section; the opening of the tank body faces upward, and the bottom of the tank body extends downward toward the thickener treatment tank while gradually narrowing to form a funnel shape; the overflow pipe section is connected to the center of the bottom end of the tank body; the defoaming tank is installed inside the overflow pipe section.
[0013] Furthermore, the flocculation and mixing slurry discharge device includes a mixing tank suspended below the thickener bridge, a flocculant addition system mounted on the open end of the mixing tank, and an agitator installed inside the mixing tank; the mixing tank is connected to a blower-screening defoaming device so that the slurry formed after defoaming can enter the mixing tank; the flocculant addition system is used to add the corresponding flocculant into the mixing tank; and the agitator is used to mix the slurry and flocculant in the mixing tank.
[0014] Furthermore, the blowing and screening defoaming device also includes a slurry outlet pipe connected to the outlet end of the defoaming tank, and the outlet of the slurry outlet pipe is connected to the mixing tank; the slurry outlet pipe is also equipped with a flow meter for measuring the slurry flow rate, and the flow meter is electrically connected to the flocculant addition system so that the flocculant addition system adds the appropriate amount of flocculant according to the slurry flow rate fed back by the flow meter.
[0015] Furthermore, the flocculation mixing and discharge device also includes a slurry pump for pumping flocculated slurry. The inlet end of the slurry pump is connected to the mixing tank so as to pump the flocculated slurry in the mixing tank back into the thickener treatment tank.
[0016] Furthermore, the flocculation mixing and slurry discharge device also includes a level gauge for measuring the liquid level in the mixing tank. The level gauge is electrically connected to the slurry pump so that the slurry pump can control the flow rate of the flocculated slurry pumped out according to the liquid level in the mixing tank measured by the level gauge.
[0017] Furthermore, the flocculation and mixing slurry discharge device also includes several turbulence plates installed inside the mixing tank.
[0018] This utility model has the following beneficial effects:
[0019] This invention utilizes several air nozzles to blow air, causing the mineralized foam in the thickener's treatment tank to gather at the center of the tank, away from the overflow around the periphery. This not only facilitates the efficient capture of ultra-stable foam by the scraper mechanism but also prevents the mineralized foam from being carried away by the overflow around the thickener's treatment tank. The device combines a defoaming screen and airflow for defoaming, transforming the ultra-stable foam into a slurry. This not only results in high defoaming efficiency and quality but also eliminates the need for water consumption during the defoaming process, reducing treatment costs. Furthermore, the resulting slurry has a high concentration, which is beneficial for subsequent flocculation and sedimentation. Addressing the characteristics of ultra-stable foam, such as its small particle size and difficulty in settling, this device adds a suitable type of flocculant to the defoamed ultra-stable foam. This allows the ultra-stable foam to settle and flocculate efficiently, preventing it from being lost with the overflow from the thickener's treatment tank. This avoids the situation where, after traditional water defoaming or mechanical defoaming, the slurry is returned directly to the thickener without treatment, and some finer mineral particles are washed away with the thickener's overflow.
[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0022] Figure 1 This is a top view of the preferred embodiment of the ultra-stable mineralized foam elimination device of this utility model;
[0023] Figure 2 yes Figure 1 A partially enlarged structural schematic diagram of the super-stable mineralization foam elimination device;
[0024] Figure 3 yes Figure 1 A cross-sectional front view schematic diagram of the super-stable mineralization foam elimination device.
[0025] Legend:
[0026] 1. Thickener treatment tank; 2. Air nozzle; 3. Thickener cable tray;
[0027] 41. Scraper motor; 42. Scraper;
[0028] 51. Defoaming screen; 52. Defoaming tank; 53. Blower; 54. Slurry outlet pipe; 55. Flow meter;
[0029] 61. Mixing tank; 62. Flocculant addition system; 63. Agitator; 64. Slurry pump; 65. Level gauge; 66. Turbulence plate. Detailed Implementation
[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.
[0031] Reference Figure 1-3 A preferred embodiment of this utility model provides an ultra-stable mineralized foam elimination device, comprising: a thickener treatment tank 1, and a plurality of air nozzles 2 arranged sequentially at intervals along the circumference of the thickener treatment tank 1. The air nozzles 2 are used to blow air into the thickener treatment tank 1 to concentrate the mineralized foam in the thickener treatment tank 1 towards the center. A thickener bridge 3 is erected above the thickener treatment tank 1. The thickener bridge 3 is equipped with a scraper mechanism, a blowing and screening defoaming device, and a flocculation and stirring slurry discharge device. The scraper mechanism is used to scrape the mineralized foam in the center of the thickener treatment tank 1 into the blowing and screening defoaming device. The blowing and screening defoaming device is used to blow air onto the mineralized foam entering it, so that the mineralized foam is defoamed after passing through the defoaming screen 51 arranged inside it to form a slurry. The blowing and screening defoaming device is also connected to the flocculation and stirring slurry discharge device so that the slurry formed after defoaming enters the flocculation and stirring slurry discharge device. The flocculation and stirring discharge device is used to flocculate and stir the slurry entering it. The flocculation and stirring discharge device is also connected to the thickener treatment tank 1 so that the flocculated slurry formed after flocculation can be returned to the thickener treatment tank 1.
[0032] When the ultra-stable mineralized foam elimination device of this utility model is working, the air nozzle 2 blows air into the thickener treatment tank 1 to make the mineralized foam move and gather in the middle of the thickener treatment tank 1. Then, the scraper mechanism is activated to scrape the mineralized foam gathered in the middle of the thickener treatment tank 1 into the blowing and screening defoaming device. Then, the blowing and screening defoaming device is activated to blow air into the mineralized foam in it, so that the mineralized foam passes through the defoaming screen 51 for defoaming. The slurry formed after defoaming flows into the flocculation and stirring discharge device. The flocculation and stirring discharge device drips chemicals into the slurry to make the slurry flocculate, and at the same time, it stirs the slurry and flocculant. The final flocculated slurry is returned to the thickener treatment tank 1 for reprocessing.
[0033] This invention utilizes several air nozzles 2 to blow air, causing the mineralized foam in the thickener treatment tank 1 to be collected at the center of the tank 1, away from the overflow outlets around the periphery. This not only facilitates the efficient capture of ultra-stable foam by the scraper mechanism but also prevents the mineralized foam from being carried away and lost by the overflow outlets around the thickener tank 1. Furthermore, this invention employs a combination of a defoaming screen 51 and airflow for defoaming, transforming the ultra-stable foam into a mineral slurry. This results in high defoaming efficiency and quality, while also ensuring effective defoaming during the defoaming process. This new device eliminates the need for water consumption, reducing processing costs and ensuring a high concentration of slurry for subsequent flocculation and sedimentation. Addressing the characteristics of ultra-stable foam particles being small and difficult to settle, a suitable type of flocculant is added to the defoamed ultra-stable foam. This allows the ultra-stable foam to settle and flocculate efficiently without being easily lost through overflow from the thickener treatment tank 1. This avoids the situation where, after traditional water defoaming or mechanical defoaming, the slurry is returned directly to the thickener without treatment, and some finer mineral particles are washed away with the thickener overflow.
[0034] Optionally, such as Figure 1 As shown, several air nozzles 2 are evenly spaced along the circumference of the thickener treatment tank 1. The air jet direction of each air nozzle 2 has an air jet angle of 30° to 90° with the circumferential tangent of the thickener treatment tank 1, so as to blow the mineralized foam in the thickener treatment tank 1 to move circumferentially and move closer to the center. This not only helps the mineralized foam to accelerate and stably gather towards the center, thus facilitating the efficient capture of ultra-stable foam by the scraper mechanism, but also prevents the mineralized foam from being carried away and lost by the overflow of the outer periphery of the thickener treatment tank 1.
[0035] Optionally, such as Figure 2 and Figure 3 As shown, the scraper mechanism includes a scraper motor 41 mounted on the thickener bridge 3 and a scraper 42 connected to the scraper motor 41. The scraper 42 is used to rotate under the action of the scraper motor 41, thereby scraping the mineralized foam in the middle of the thickener treatment tank 1 into the blowing and screening defoaming device.
[0036] Optionally, such as Figure 3As shown, the blowing and screening defoaming device also includes a defoaming tank 52 suspended below the thickener bridge 3, and a blower 53 fixed to the thickener bridge 3 for blowing air into the defoaming tank 52. A defoaming screen 51 is arranged inside the defoaming tank 52, dividing the inner cavity of the defoaming tank 52 into a foam chamber and a slurry outlet chamber arranged sequentially. The slurry outlet chamber is connected to a flocculation and stirring slurry outlet device, so that the slurry formed after passing through the defoaming screen 51 enters the flocculation and stirring slurry outlet device. In this optional embodiment, the defoaming screen 51 is 18-50 mesh with an aperture of approximately 1mm-0.3mm, and the defoaming screen 51 is detachable for cleaning; the blower 53 includes a blower and an air pipe connected to the blower, with the air pipe facing the defoaming tank 52. During operation, the mineralized foam enters the foam chamber of the defoaming tank 52 under the action of the scraper mechanism. The blower supplies airflow at a certain speed, causing the mineralized foam to pass through the defoaming screen 51 for defoaming. The defoamed slurry enters the slurry outlet chamber and flows outward from the slurry outlet chamber.
[0037] In this optional solution, such as Figure 3 As shown, the defoaming tank 52 includes a tank body and an overflow pipe section. The opening of the tank body faces upward, and the bottom of the tank body extends downward toward the thickener treatment tank 1 while gradually narrowing to form a funnel shape, so that the mineralized foam can gather as much as possible at the bottom center of the tank body, thereby facilitating defoaming by blowing air. The overflow pipe section is connected to the center of the bottom end of the tank body. The defoaming tank 52 is installed inside the overflow pipe section.
[0038] Optionally, such as Figure 2 and Figure 3 As shown, the flocculation and mixing slurry discharge device includes a mixing tank 61 suspended below the thickener bridge 3, a flocculant addition system 62 mounted on the open end of the mixing tank 61, and an agitator 63 arranged inside the mixing tank 61. The mixing tank 61 is connected to an air-blowing and screening defoaming device to allow the slurry formed after defoaming to enter the mixing tank 61. The flocculant addition system 62 is used to add the corresponding flocculant into the mixing tank 61. The agitator 63 is used to mix the slurry and flocculant in the mixing tank 61. In this optional embodiment, the agitator 63 includes a drive motor fixed on the thickener bridge 3 and an agitator rod connected to the drive motor. The agitator rod extends into the mixing tank 61, and the mixing speed of the agitator rod is typically 50-500 rpm. During operation, the slurry discharged by the blowing and screening defoaming device enters the mixing tank 61. The flocculant addition system 62 adds the corresponding type of flocculant to the mixing tank 61 according to the type of slurry. At the same time, the agitator 63 starts stirring to fully mix the slurry and flocculant, improve the efficiency of the flocculation reaction and enhance the effect of the flocculation reaction.
[0039] Preferably, such as Figure 3As shown, the blowing and screening defoaming device also includes a slurry outlet pipe 54 connected to the outlet end of the defoaming tank 52, and the outlet of the slurry outlet pipe 54 is connected to the mixing tank 61. A flow meter 55 is also installed in the slurry outlet pipe 54 to measure the slurry flow rate. The flow meter 55 is electrically connected to the flocculant addition system 62, so that the flocculant addition system 62 adds the appropriate amount of flocculant based on the slurry flow rate fed back by the flow meter 55. During operation, the defoamed slurry enters the slurry outlet pipe 54 from the defoaming tank 52. The slurry outlet pipe 54 is a U-shaped pipe, and a flow meter 55 is installed on one side of the U-shaped pipe to collect the slurry flow rate information. The slurry then enters the mixing tank 61 through the other side of the U-shaped pipe, and the flocculant addition system 62 adds a certain amount of flocculant based on the slurry flow rate fed back by the flow meter 55.
[0040] In this optional solution, such as Figure 2 and Figure 3 As shown, the flocculation mixing and discharge device also includes a slurry pump 64 for pumping flocculated slurry. The inlet end of the slurry pump 64 is connected to the mixing tank 61 to pump the flocculated slurry in the mixing tank 61 back into the thickener treatment tank 1.
[0041] Preferably, such as Figure 2 and Figure 3 As shown, the flocculation and mixing slurry discharge device also includes a level gauge 65 for measuring the liquid level inside the mixing tank 61. The level gauge 65 is electrically connected to the slurry pump 64 so that the slurry pump 64 can control the flow rate of the flocculated slurry pumped out according to the liquid level measured by the level gauge 65 inside the mixing tank 61. The level gauge 65 is used to control the slurry level to prevent the slurry level from being too high or the slurry from being pumped out. During operation, the level gauge 65 feeds back the liquid level information to the slurry pump 64. When the liquid level is too low, the slurry pump 64 stops running, or is controlled to continue running within a certain speed. The slurry pump 64 is used to pump the flocculated slurry in the mixing tank 61 back to the thickener treatment tank 1.
[0042] Preferably, the flocculation and stirring slurry discharge device further includes several turbulence plates 66 disposed in the stirring tank 61, which are used to break the rotating laminar flow, enhance the turbulence intensity, and improve the mixing efficiency of the liquid and slurry.
[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An ultra-stable mineralized foam elimination device, characterized in that, include: Thickener treatment tank (1), and a number of air nozzles (2) arranged sequentially and at intervals along the circumference of thickener treatment tank (1). The number of air nozzles (2) are used to blow air into thickener treatment tank (1) so that the mineralized foam in thickener treatment tank (1) is concentrated in the center. A thickener bridge (3) is installed above the thickener treatment tank (1). The thickener bridge (3) is equipped with a scraper mechanism, a blowing and screening defoaming device and a flocculation and stirring slurry discharge device. The scraper mechanism is used to scrape the mineralized foam in the middle of the thickener treatment tank (1) into the blowing and screening defoaming device. The blowing and screening defoaming device is used to blow air into the mineralized foam that enters it, so that the mineralized foam is defoamed after passing through the defoaming screen (51) arranged inside it to form a slurry. The blowing and screening defoaming device is also connected to the flocculation and stirring slurry discharge device so that the slurry formed after defoaming enters the flocculation and stirring slurry discharge device. The flocculation and stirring discharge device is used to flocculate and stir the slurry entering it. The flocculation and stirring discharge device is also connected to the thickener treatment tank (1) so that the flocculated slurry formed after flocculation can be returned to the thickener treatment tank (1).
2. The ultra-stable mineralized foam elimination device according to claim 1, characterized in that, Several air nozzles (2) are evenly spaced along the circumference of the thickener treatment tank (1); Each nozzle (2) has a jetting angle of 30° to 90° with the circumferential tangent of the thickener treatment tank (1) to blow the mineralized foam in the thickener treatment tank (1) along the circumferential direction and move it closer to the center.
3. The ultra-stable mineralized foam elimination device according to claim 1, characterized in that, The scraper mechanism includes a scraper motor (41) mounted on the thickener bridge (3) and a scraper (42) connected to the scraper motor (41); The scraper (42) is used to rotate under the action of the scraper motor (41) to scrape the mineralized foam in the middle of the thickener treatment tank (1) into the blowing and screening defoaming device.
4. The ultra-stable mineralized foam elimination device according to claim 1, characterized in that, The blowing and sieving defoaming device also includes a defoaming tank (52) suspended below the thickener bridge (3) and a blower (53) fixed on the thickener bridge (3) for blowing air into the defoaming tank (52); The defoaming screen (51) is arranged in the defoaming tank (52) and divides the inner cavity of the defoaming tank (52) into a foaming chamber and a slurry outlet chamber arranged in sequence. The slurry outlet chamber is connected to the flocculation stirring slurry outlet device so that the slurry formed after passing through the defoaming screen (51) enters the flocculation stirring slurry outlet device.
5. The ultra-stable mineralized foam elimination device according to claim 4, characterized in that, The defoaming tank (52) includes a tank body and an overflow pipe section; The opening of the tank faces upward, and the bottom of the tank extends downward toward the thickener treatment tank (1) while gradually narrowing to form a funnel shape; The overflow pipe is connected to the center of the bottom end of the tank. The defoaming tank (52) is installed inside the overflow pipe section.
6. The ultra-stable mineralized foam elimination device according to claim 4, characterized in that, The flocculation mixing and slurry discharge device includes a mixing tank (61) suspended below the thickener bridge (3), a flocculant addition system (62) mounted on the open end of the mixing tank (61), and a stirrer (63) arranged inside the mixing tank (61). The mixing tank (61) is connected to the blowing and screening defoaming device so that the slurry formed after defoaming can enter the mixing tank (61); The flocculant addition system (62) is used to add the corresponding flocculant into the mixing tank (61); The agitator (63) is used to agitate the slurry and flocculant in the mixing tank (61).
7. The ultra-stable mineralized foam elimination device according to claim 6, characterized in that, The blowing and screening defoaming device also includes a slurry outlet pipe (54) connected to the outlet end of the defoaming tank (52), and the outlet of the slurry outlet pipe (54) is connected to the mixing tank (61). The slurry outlet pipe (54) is also equipped with a flow meter (55) for measuring the slurry flow rate. The flow meter (55) is electrically connected to the flocculant addition system (62) so that the flocculant addition system (62) adds the amount of flocculant according to the slurry flow rate fed back by the flow meter (55).
8. The ultra-stable mineralized foam elimination device according to claim 6, characterized in that, The flocculation mixing and discharge device also includes a slurry pump (64) for pumping flocculated slurry. The inlet end of the slurry pump (64) is connected to the mixing tank (61) for pumping the flocculated slurry in the mixing tank (61) back into the thickener treatment tank (1).
9. The ultra-stable mineralized foam elimination device according to claim 8, characterized in that, The flocculation mixing and slurry discharge device also includes a level gauge (65) for measuring the liquid level in the mixing tank (61). The level gauge (65) is electrically connected to the slurry pump (64) so that the slurry pump (64) can control the flow rate of the flocculated slurry pumped out according to the liquid level in the mixing tank (61) measured by the level gauge (65).
10. The ultra-stable mineralized foam elimination device according to claim 1, characterized in that, The flocculation and mixing slurry discharge device also includes several turbulence plates (66) installed inside the mixing tank (61).