Rapid concentration device for micron-grade and submicron-grade powder low-concentration slurry

Abstract

The utility model discloses a rapid concentration device for micron-grade and submicron-grade powder low-concentration slurry, relates to the technical field of diamond powder slurry processing, and solves the problem of low processing efficiency of concentration and purification equipment in the prior art. The device comprises a negative pressure suction system, the negative pressure suction system is connected with a nanopore filter element, the nanopore filter element is arranged in a material container, and the material container is matched with a stirring mechanism; the material container is connected with the material supply system, and the material container and the material supply system are both used for containing powder slurry. The negative pressure suction system and the nano-pore filter element are used for negative pressure suction, so that rapid filtration is realized; and the material supply system containing the powder slurry is arranged, so that the liquid level in the material container can be maintained, and air is prevented from being sucked to influence the filtering efficiency. The rapid concentration of the powder material is realized, the concentration processing time is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of diamond powder slurry processing technology, and in particular to a device for rapid concentration of low-concentration slurry after hydraulic classification of micron- and submicron-sized powders. Background Technology

[0002] Diamond micron powder, as a high-performance material, has been widely used in various fields in recent years, showing strong development momentum, including clean energy, consumer electronics, semiconductors, ceramics and stone materials, oil and gas extraction, geological drilling, and machining. After ball milling, shaping, and coarse purification, a crucial step in diamond micron powder production is particle size classification. The main purpose is to ensure a concentrated particle size distribution and completely eliminate oversized particles. In the production of micron and submicron particles, wet classification is generally used. This involves using water containing surfactants as a dispersion liquid and preparing a suspension of a certain concentration with the material to be classified. This suspension is then subjected to multiple rounds of coarsening and refining to obtain products of various particle sizes. However, the coarsening and refining processes generate a large amount of low-concentration slurry, which cannot be directly classified in subsequent classifications. Only after concentrating to a certain concentration can the material be classified to obtain the target particle size product.

[0003] Currently, the commonly used production methods are as follows: Method 1, adding flocculants can achieve rapid material concentration and reduce the space occupied by the material. However, this method increases impurities and makes subsequent processing more difficult due to the addition of flocculants. Moreover, the performance of the product is affected by the different types of flocculants. Method 2, the large amount of low-concentration slurry generated is concentrated by centrifugation or natural sedimentation. The former requires more manpower and equipment to meet the requirements, while the latter has a long production cycle and slow efficiency due to natural sedimentation.

[0004] Chinese utility model patent CN208260970U discloses a diamond micron powder filtration and purification device, overcoming the problem of insufficient efficiency in particle size classification in existing technologies. This utility model includes a main settling cylinder, an auxiliary settling cylinder, a separator, a separator feed pipe, and a separator feed control device. The main settling cylinder contains the separator feed pipe, one end of which passes through the main settling cylinder and connects to the separator. The auxiliary settling cylinder is located below the separator outlet. The separator is connected to the separator feed control device via a wire. The separator feed pipe includes a main feed pipe and a branch feed pipe. The branch feed pipe includes a feed pipe and an anti-accumulation ramp. An inverted V-shaped anti-accumulation ramp is located directly above the feed pipe, and a feed hole is located on the vertical side of the feed pipe. This technology maximizes the removal of floating impurities during classification while achieving high-quality classification.

[0005] This scheme uses stirred sedimentation for precipitation separation and purification, but it also suffers from long processing time and low efficiency, and is unsuitable for the concentration and purification of large quantities of low-concentration slurries. Furthermore, the large volume and weight of existing low-concentration slurries present challenges in handling and processing them in a single batch. Utility Model Content

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes a rapid concentration device for low-concentration slurries of micron- and submicron-level powders, which solves the problem of low processing efficiency in existing concentration and purification equipment.

[0007] The technical solution of this utility model is implemented as follows: a rapid concentration device for low-concentration slurry of micron- and submicron-level powders, including a negative pressure suction system, which is connected to a nanoporous filter element. The nanoporous filter element is placed inside a material container, which is coordinated with a stirring mechanism. The material container is connected to a material supply system, and both the material container and the material supply system are used to hold the powder slurry.

[0008] Preferably, the negative pressure suction system includes a vacuum container, the inlet end of which is connected to a nanoporous filter element via a negative pressure suction pipe, the vacuum container is connected to a vacuum pump via a vacuum tube, and the vacuum container is equipped with a vent valve and an outlet end.

[0009] Preferably, the discharge end of the vacuum container is connected to the water storage tank. Solenoid valves are provided on the vacuum tube, the inlet end, and the discharge end.

[0010] Preferably, the material supply system includes a level controller, which works in conjunction with a water supply pipe, which is connected to a storage tank, and an electric diaphragm pump is installed on the water supply pipe.

[0011] Preferably, the device also includes a support frame fixed to the ground, on which the stirring mechanism, nanoporous filter element, liquid level controller, and water supply pipe are all fixed. The position of the liquid level controller matches the top height of the nanoporous filter element.

[0012] Preferably, the material container is an open-top container, and the output ends of the stirring mechanism, nanoporous filter element, and material supply system all enter the material container from the open-top opening. The material container is set on a lifting platform, which can drive the material container to rise and fall. A trolley is connected to the bottom of the lifting platform.

[0013] Preferably, the stirring mechanism is an electric stirring paddle or an ultrasonic stirring paddle, with the stirring end of the electric stirring paddle or ultrasonic stirring paddle extending into the material container. The nanoporous filter element is a rectangular multilayer nanoporous ceramic filter element.

[0014] The beneficial effects of this invention are as follows: By setting up a material container, powder slurry can be contained, and a negative pressure suction system and a nanoporous filter element are used for negative pressure suction to achieve rapid filtration. Simultaneously, an auxiliary stirring mechanism is set up to continuously promote the flow of the slurry through stirring, preventing clogging of the nanoporous filter element. By setting up a material supply system containing the powder slurry, the liquid level of the powder slurry in the material container can be maintained, preventing air from being drawn into the nanoporous filter element and affecting filtration efficiency. This device achieves rapid concentration of powder materials, shortens the concentration processing time, improves production efficiency, and allows for the recycling of filtered water. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the nanoporous filter element structure of this utility model;

[0018] In the diagram: 1: Negative pressure suction system, 2: Nanoporous filter element, 3: Material container, 4: Stirring mechanism, 5: Material supply system, 11: Vacuum container, 12: Negative pressure suction pipe, 13: Vacuum pipe, 14: Vacuum pump, 15: Vent valve, 16: Water storage tank, 17: Solenoid valve, 51: Liquid level controller, 52: Water supply pipe, 53: Storage tank, 54: Electric diaphragm pump, 6: Lifting platform, 7: Trolley, 21: Rectangular filter support frame, 22: Support column, 23: Rectangular nano-scale ceramic membrane, 24: Pipeline. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 , 2As shown in Example 1, a rapid concentration device for low-concentration slurries of micron- and submicron-sized powders includes a negative pressure suction system 1 connected to a nanoporous filter element 2. The nanoporous filter element 2 is disposed within a material container 3, which is coordinated with a stirring mechanism 4. During processing, the stirring mechanism assists in continuously promoting slurry flow through stirring, preventing clogging of the nanoporous filter element. Additionally, the material container 3 is connected to a material supply system 5, both used to hold the powder slurry. This embodiment utilizes a negative pressure suction system and a nanoporous filter element for rapid filtration of the powder slurry contained in the material container. By setting up a material supply system also containing powder slurry, the liquid level of the powder slurry in the material container can be maintained, ensuring that the nanoporous filter element 2 is completely submerged in the slurry, maintaining a negative pressure state throughout the system, and preventing air from being drawn in through the exposed portion of the nanoporous filter element 2, thus affecting filtration efficiency. This device achieves rapid concentration of powder slurry through vacuum filtration, shortening the concentration processing time and improving production efficiency.

[0021] As a further specific embodiment, the nanoporous filter element 2 is a rectangular multilayer nanoporous ceramic filter element. Specifically, in this embodiment, a nano-scale ceramic membrane is selected as the filter element for solid-liquid separation. This ceramic membrane has advantages such as wear resistance and good pore size uniformity. The rectangular multilayer design increases the number of nanopores, increases the filtration area, and improves the pumping efficiency.

[0022] Example 2, based on Example 1, the negative pressure suction system 1 includes a vacuum container 11. The liquid inlet end of the vacuum container 11 is connected to the nanoporous filter element 2 through a negative pressure suction pipe 12. The vacuum container 11 is connected to the vacuum pump 14 through a vacuum pipe 13. The vacuum container 11 is provided with a venting valve 15 and a discharge end.

[0023] In this embodiment, the vacuum pump, vent valve, and liquid inlet are all located at the top of the vacuum container, while the discharge end is located at the bottom of the vacuum container. The vacuum pump is used to create a vacuum in the vacuum container to generate negative pressure. This negative pressure is then transmitted to the nanoporous filter element through the negative pressure suction pipe. The water in the powder slurry is then drawn into the vacuum container using the filtration effect of the nanoporous filter element. Feeding the material under negative pressure can prevent the wear of the pump caused by leaking abrasive.

[0024] As a further embodiment, the discharge end of the vacuum container 11 is connected to the water storage tank 16. When the water in the vacuum container reaches the required volume, it can be discharged into the water storage tank 16 through the discharge end. In addition, the filtered water can be recycled after being supplemented with a certain amount of surfactant.

[0025] In addition, solenoid valves 17 are provided on the vacuum tube 13, the liquid inlet end and the discharge end. During the concentration process, the opening and closing of the corresponding pipeline or port is controlled by controlling the corresponding solenoid valve.

[0026] Example 3, based on Example 2, the material supply system 5 includes a liquid level controller 51 installed in the material container 3. The liquid level controller 51 is in conjunction with the water supply pipe 52. Optionally, the liquid level controller is installed at the end of the water supply pipe. The water supply pipe 52 is connected to the storage tank 53. An electric diaphragm pump 54 is installed on the water supply pipe 52.

[0027] In addition, as a further embodiment, the device also includes a support frame fixed to the ground, on which the stirring mechanism 4, nanoporous filter element 2, liquid level controller 51, and water supply pipe 52 are all fixed. The support frame can be a conventional profile frame, serving a supporting and fixing function.

[0028] In this embodiment, the level controller can be a conventional float level controller, etc. The level controller is located at the end of the water inlet pipe, and both the water inlet pipe and the level controller are fixedly mounted on the support frame to supply powder slurry into the material container in a fixed posture. As a further optional solution, the level controller is electrically connected to a control board, which can control the opening and closing of the electric diaphragm pump. Furthermore, the position of the level controller 51 is matched to the top height of the nanoporous filter element 2; that is, when the liquid level in the material container is lower than the top of the nanoporous filter element, the level controller is triggered, thereby sending an electrical signal. After receiving the electrical signal, the control board controls the electric diaphragm pump to operate, drawing powder slurry from the storage tank and pumping it into the material container 3.

[0029] In this embodiment, the material container 3 is an open-top container. The stirring mechanism, nanoporous filter element 2, and liquid level controller 31 all enter the material container 3 through the open top. The material container 3 is mounted on the lifting platform 6, and a trolley 7 is connected to the bottom of the lifting platform 6. The lifting platform 6 includes a support plate, and a hydraulic lifting bracket is provided at the bottom of the support plate. The hydraulic lifting bracket is mounted on the trolley. The hydraulic lifting bracket can be the type disclosed in the invention patent with publication number CN103950866A. Through the extension of the hydraulic cylinder on it, the support plate mounted on the top of the hydraulic lifting bracket moves up and down, thereby driving the material container mounted on the support plate to rise and fall, thus controlling the engagement or disengagement of the material container and components such as the nanoporous filter element 2. After concentration is completed, the material container can be transferred by pushing it with the trolley. The trolley and the lifting platform work together to improve the convenience of transfer and loading / unloading.

[0030] Example 4: Based on Example 3, the stirring mechanism 4 can be a conventional electric stirring paddle or an ultrasonic stirring paddle, with the stirring end of the electric stirring paddle or ultrasonic stirring paddle extending into the material container.

[0031] As a further specific implementation method, such as Figure 2As shown, in this embodiment, the nanoporous filter element 2 includes several vertically spaced rectangular filter support frames 21. The rectangular filter support frames 21 are fixedly connected by pillars 22 located at the corners. Rectangular nano-scale ceramic membranes 23 are fixedly laid on both vertical sides of the rectangular filter support frames 21, thereby forming several hollow boxes with a certain interval between adjacent boxes. The interiors of the hollow boxes are connected by pipes 24 and connected to a negative pressure extraction pipe 12 through pipes 24. Thus, the negative pressure extraction pipe 12 can transmit negative pressure and suction to the hollow boxes. After the nanoporous filter element is immersed in the powder slurry, it then filters the powder slurry in contact with the rectangular nano-scale ceramic membrane. The water in the powder slurry is drawn into the hollow boxes, then enters the negative pressure extraction pipe through the pipes, and finally enters the vacuum container. In addition, the stirring end of the electric stirring paddle or ultrasonic stirring paddle passes through the gap between the adjacent hollow boxes and is located below the nanoporous filter element. With the stirring of the electric stirring paddle or ultrasonic vibration, the powder slurry in the material container is mixed evenly. Once the concentration of the powder slurry in the material container reaches the standard, stirring is stopped, the lifting platform moves down and separates from the nanoporous filter element. The vertically set rectangular filter support frame 21 can prevent the diamond powder in the powder slurry from moving down with the material container, thus avoiding residue.

[0032] When using this device:

[0033] First, ultrasonically stir the low-concentration powder slurry to be concentrated evenly, then transfer it to the material container and place it on the lifting platform. Use a trolley to push it directly under the nanoporous filter element, while ensuring that the storage tank 53 is filled with the same low-concentration powder slurry to be concentrated.

[0034] Second: Raise the lifting platform to completely immerse the nanoporous filter element in the powder slurry, and at the same time turn on the stirring mechanism to make the material completely and evenly dispersed, and turn on the liquid level controller switch.

[0035] 3. Turn on the negative pressure suction system, that is, turn on the vacuum pump and the solenoid valve on the vacuum tube, close the vent valve and the solenoid valve at the discharge end of the vacuum container. At this time, a negative pressure is formed in the vacuum container. Under the negative pressure, the water in the powder slurry is drawn into the vacuum container. At the same time, the solenoid valve on the vacuum tube and the vacuum pump should be set to control the time according to the material flow rate and the size of the vacuum container. The stirring mechanism should keep stirring or ultrasonic stirring to ensure that the nanoporous filter element does not get clogged. Meanwhile, the liquid level controller can control the material supply system to supply low concentration powder slurry to the material container at any time according to the liquid level, ensuring that the nanoporous filter element is always below the liquid level.

[0036] 4. After a certain period of time, once the liquid level in the vacuum container reaches a certain height, the vacuum pump stops working, the solenoid valve on the vacuum tube closes, and the vent valve and the solenoid valve at the discharge end of the vacuum container open. The extracted water is then placed into a storage tank. This water can be recycled after being replenished with a certain amount of surfactant. The concentration process can be stopped when the material is concentrated to a suitable fractionation concentration.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for rapid concentration of low-concentration slurries of micron- and submicron-sized powders, characterized in that: It includes a negative pressure suction system (1), which is connected to a nanoporous filter element (2). The nanoporous filter element (2) is placed inside a material container (3), which is in conjunction with a stirring mechanism (4). The material container (3) is connected to a material supply system (5), and both the material container (3) and the material supply system (5) are used to hold powder slurry.

2. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 1, characterized in that: The negative pressure suction system (1) includes a vacuum container (11). The liquid inlet of the vacuum container (11) is connected to the nanoporous filter element (2) through a negative pressure suction pipe (12). The vacuum container (11) is connected to the vacuum pump (14) through a vacuum pipe (13). The vacuum container (11) is equipped with a venting valve (15) and a discharge end.

3. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 2, characterized in that: The discharge end of the vacuum container (11) is connected to the water storage tank (16).

4. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 3, characterized in that: The vacuum tube (13) is equipped with solenoid valves (17) at the inlet and outlet ends.

5. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to any one of claims 1 to 4, characterized in that: The material supply system (5) includes a level controller (51), which is in conjunction with a water supply pipe (52). The water supply pipe (52) is connected to a storage tank (53), and an electric diaphragm pump (54) is installed on the water supply pipe (52).

6. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 5, characterized in that: It also includes a support frame fixed to the ground, and the stirring mechanism (4), nanoporous filter element (2), liquid level controller (51) and water supply pipe are all fixed on the support frame.

7. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 6, characterized in that: The position of the liquid level controller (51) matches the top height of the nanoporous filter element (2).

8. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to any one of claims 1 to 4, 6, and 7, characterized in that: The material container (3) is an open container. The output ends of the stirring mechanism (4), the nanoporous filter (2), and the material supply system (5) all enter the material container (3) from the open top. The material container (3) is set on the lifting platform (6). The lifting platform (6) can drive the material container (3) to rise and fall. A trolley (7) is connected to the bottom of the lifting platform (6).

9. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 8, characterized in that: The stirring mechanism (4) is an electric stirring paddle or an ultrasonic stirring paddle, and the stirring end of the electric stirring paddle or ultrasonic stirring paddle extends into the material container (3).

10. The rapid concentration device for low-concentration slurries of micron- and submicron-sized powders according to claim 9, characterized in that: The nanoporous filter element (2) is a rectangular multilayer nanoporous ceramic filter element.

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