A multi-stage separation device based on wet ball milling

Abstract

The present invention discloses a multi-stage separation device based on wet ball milling, comprising a first separator provided with a cavity and a second separator, wherein the second separator divides the cavity of the first separator into a first separation cavity and a second separation cavity connected with a discharge port, wherein the first separation cavity is located between the first separator and the second separator, and the second separation cavity is located in the second separator, and the second separation cavity is connected with the first separation cavity radially and axially to form a first separation channel and a second separation channel. Since the surface area of ​​the second separator is relatively small, the pressure of the first separation cavity increases during separation, the separation efficiency is low, and the risk of separation failure of the second separator is increased. The separation flow is increased through the second separation channel, the pressure of the first separation cavity is reduced, and failure is avoided. The grinding balls that may exist in the first separation cavity can also be reduced from entering the second separation cavity. It can both increase the separation flow and reduce the ball leakage phenomenon.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and separation, and in particular to a multi-stage separation device based on wet ball milling. Background Art

[0002] Existing wet grinding devices, such as ball mills, require continuous discharge, and during the discharge process, the grinding balls must be prevented from entering the discharge channel, causing contamination of the material discharged after grinding. Therefore, a separation device, such as a mesh separator, is provided between the grinding chamber and the discharge port to separate the material from the grinding balls. Due to the grinding requirements, the diameter of the material after grinding is required to be small, so the separation gap on the separator is small. To ensure that each separation gap on the separator is of the same size and each separation gap is basically the same, a cylindrical separation cylinder can only be made by spirally winding a metal wire. A plurality of reinforcing ribs arranged in the length direction are provided on the inner side of the cylindrical separation cylinder. On the one hand, the structural strength can be increased, and on the other hand, the stability and consistency of the gap between the spiral metal wires can be determined. However, the separation device is usually provided with a dispersion device on the outside, such as a dispersion turbine, so that the grinding material and grinding medium in the grinding chamber move at high speed to achieve grinding. In this way, a high-speed rotation of the grinding balls and material mixture is formed between the separation device and the dispersion turbine, and then the grinding balls or the broken balls caused by grinding perform tangential extrusion on the surface of the separation device. When the metal wire between the two reinforcing ribs is subjected to such extrusion, the separation gap will be locally deformed, resulting in an uneven separation gap and causing ball leakage. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a multi-stage separation device based on wet ball milling, which avoids separation failure and improves separation efficiency by changing the flow mode.

[0004] In order to solve the above technical problems, the present invention provides a multi-stage separation device based on wet ball milling, which includes a first separator provided with a cavity and a second separator located in the cavity of the first separator, the surface area of ​​the second separator is smaller than the surface area of ​​the first separator, the second separator divides the cavity of the first separator into a first separation cavity and a second separation cavity connected to a discharge port, the first separation cavity is located between the first separator and the second separator, the second separation cavity is located in the second separator, the second separation cavity is radially and axially connected to the first separation cavity to form a first separation channel and a second separation channel, and the end and radial directions of the first separator are respectively provided with covers that close the cavity of the first separator axially. and a first separation gap connecting the inside and outside of the first separator, wherein a third separation gap connecting the first separation chamber and the second separation chamber is provided between the cover and the end of the second separator; a through hole and a second separation gap are respectively provided at the end and radial direction of the second separator, the second separation gap connects the second separation chamber and the first separation chamber, the through hole connects the second separation chamber and the first separation chamber through the third separation gap, the second separation channel includes a third separation gap connected to the first separation gap and the second separation chamber, wherein the third separation gap is axially connected to the second separation chamber, an ultrasonic vibration component is provided in the first separation chamber, the ultrasonic vibration component includes a vibration rod and an ultrasonic generator that generates vibration to the vibration rod or around the vibration rod.

[0005] Furthermore, the first separation channel includes a second separation cavity radially connected to the first separation gap and the second separation gap.

[0006] Furthermore, the second separation channel is provided with a ball blocking mechanism.

[0007] Furthermore, the ball blocking mechanism comprises a first spoiler plate extending radially toward the first separator and a second spoiler plate extending radially toward the second separator, and the first spoiler plate and the second spoiler plate are offset to form a spoiler channel.

[0008] Furthermore, the first spoiler is located close to the discharge port, and the second spoiler is located outside the first spoiler.

[0009] Furthermore, the multi-stage separation device is also provided with a grinding ball sorting mechanism.

[0010] Furthermore, the grinding ball sorting mechanism comprises a grinding ball sorting chamber connected to the first separation chamber, and the grinding ball sorting chamber is provided with a ball discharge hole and a switch for controlling the ball discharge hole.

[0011] Furthermore, the bottom of the grinding ball sorting chamber is lower than the first separation chamber.

[0012] Furthermore, the bottom of the grinding ball sorting chamber is inclined toward the discharge port.

[0013] Furthermore, an ultrasonic vibration component is provided in the first separation chamber.

[0014] Furthermore, the ultrasonic vibration component includes a vibration rod and an ultrasonic generator that generates vibration to the vibration rod or around the vibration rod.

[0015] Furthermore, the multi-stage separation device also includes a water cooling pipe for cooling the temperature.

[0016] Furthermore, a sealing gasket is provided between the sealing cover and the first separator.

[0017] Furthermore, the second separator gradually increases in radial direction at the end portion.

[0018] Furthermore, the end of the second separation chamber is in a trumpet-shaped structure.

[0019] The present invention discloses a multi-stage separation device based on wet ball milling, comprising a first separator provided with a cavity and a second separator located in the cavity of the first separator, wherein the second separator divides the cavity of the first separator into a first separation cavity and a second separation cavity connected to a discharge port, wherein the first separation cavity is located between the first separator and the second separator, and the second separation cavity is located in the second separator, and the second separation cavity is connected to the first separation cavity radially and axially to form a first separation channel and a second separation channel. Since the surface area of ​​the second separator is smaller than that of the first separator, the pressure in the first separation cavity increases during separation, which reduces the separation flow rate and results in low separation efficiency, and the pressure in the first separation cavity increases, which leads to the risk of separation failure of the second separator. By making the second separation cavity connected to the first separation cavity in the radial direction, i.e., one end in the length direction to form a second separation channel, the separation flow rate is increased, and the pressure of the first separation cavity can be reduced. At the same time, since the mass of the grinding balls during separation is much greater than the diameter and mass of the material, even if a small amount of grinding balls enter the first separation chamber, they are basically moved to the bottom of the first separation chamber due to their own gravity, and the second separation chamber keeps the grinding balls away from the discharge port, which can also reduce the grinding balls that may exist in the first separation chamber from entering the second separation chamber for discharge. In this way, the separation flow rate can be guaranteed to improve the separation efficiency and reduce the ball leakage phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the description only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of a multi-stage separation device based on wet ball milling.

[0022] Figure 2 It is a schematic diagram of the axial cross-sectional structure of an embodiment of a multi-stage separation device based on wet ball milling.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The claims of the present invention are further described in detail below in conjunction with specific embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments proposed by ordinary technicians in this field before making creative work also fall within the scope of protection of the present invention.

[0025] It should be understood that, in the description of the embodiments of the present invention, all directional indication terms, such as "up", "down", "left", "right", "front", "back", etc., indicate the orientation or position relationship based on the orientation, position relationship shown in the drawings or the orientation or position relationship in which the invented product is usually placed when in use, which is only for the convenience of simplifying the description of the present invention, and does not expressly or imply that the device, element or component referred to must have a specific orientation and a specific orientation structure, and should not be understood as a limitation on the present invention. It is only used to explain the relative position relationship, movement, etc. between the components shown in the drawings. When the specific posture changes, the directional indication may also change accordingly.

[0026] In addition, ordinal numbers such as "first" and "second" in the present invention are only used for the purpose of distinction, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" can explicitly or implicitly indicate at least one of the technical features. In the description of the present invention, "multiple" means at least two, that is, two or more, unless otherwise clearly defined; "at least one" means one or one and more.

[0027] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, the positional relationship between components can be relatively fixed, or the components can be physically fixedly connected; they can be detachably connected or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium or component; they can be internally connected between two elements or interact with each other. Unless otherwise clearly defined in the specification, other interpretations may not achieve the corresponding functions or effects. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The controller and control circuit involved in the present invention are conventional control technologies or units of those skilled in the art. For example, the control circuit of the controller can be realized by ordinary technicians in the field using existing technologies, such as simple programming. The software or program involved in cooperating with the hardware to achieve the control result, if the description does not provide detailed information about the software or program control process involved, belongs to the use of existing technologies or conventional technologies of ordinary technicians in the field. The power supply also adopts the existing technologies in the field, and the main technical point of the present invention is to improve the mechanical device, so the present invention will not describe the specific circuit control relationship and circuit connection in detail.

[0029] The disclosure of the present invention provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described in the present invention. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] like Figure 1-Figure 2 As shown, the present invention provides an embodiment of a multi-stage separation device based on wet ball milling.

[0032] The multi-stage separation device based on wet ball milling includes a first separator 3 with a cavity and a second separator 4 located in the cavity of the first separator. The second separator 3 divides the cavity of the first separator 3 into a first separation cavity 31 and a second separation cavity 42 connected to the discharge port 2. The first separation cavity 31 is located between the first separator 3 and the second separator 4, and the second separation cavity 41 is located in the second separator 4. The second separation cavity 41 is radially and axially connected to the first separation cavity 31 to form a first separation channel and a second separation channel.

[0033] Specifically, the first separator 3 and the second separator 4 are hollow structures in the length direction, that is, hollow structures in the axial direction, and their shapes can be set as needed. For the convenience of explanation, the first separator 3 and the second separator 4 in this embodiment are cylindrical structures, and the first separator 3 and the second separator 4 are formed by stacking multiple separation rings in the axial direction, and there is a gap between each separation ring. The first separator 3 and the second separator 4 can also be wound with a metal wire with a rectangular cross section, and each circle of the metal wire has a gap for separation. The size of the gap is set according to the size of the grinding ball of the separated material, and the minimum can be 0.12-0.18mm.

[0034] The first separator 3 and the second separator 4 are coaxially mounted on the separation fixing seat 1, wherein the second separation cavity of the second separator 4 passes through the separation fixing seat 1, and the second separation cavity 41 is communicated with the discharge port 2. The first separator 3 is provided with a first separation gap 32, and the second separator 4 is provided with a second separation gap 42.

[0035] The end and radial direction of the first separator 3 are respectively provided with a cover 33 that closes the first separator cavity axially and a first separation gap 32 that communicates with the inside and outside of the first separator 3, wherein a third separation gap 35 that communicates with the first separation chamber 31 and the second separation chamber 41 is provided between the cover 33 and the end of the second separator 4; the end and radial direction of the second separator 4 are respectively provided with a through hole 43 and a second separation gap 42, wherein the second separation gap 42 communicates with the second separation chamber 41 and the first separation chamber 31, and the through hole 43 communicates with the second separation chamber 42 and the first separation chamber 31 through the third separation gap 35. The first separation channel includes the first separation gap 32, the second separation gap 42 and the first separation chamber 31 that communicate with the first separation gap 32 and the second separation gap 42, that is, the material passes from the outside of the first separator 3 through the first separation gap 32 to the first separation chamber 31, and then passes through the second separation gap 42 of the second separator 4 to reach the second separation chamber 41, and finally is discharged through the discharge port 2 that communicates with the second separation chamber 41. The second separation channel includes the first separation gap 32, the third separation gap 35 and the second separation chamber 42 connected to the first separation gap 32 and the third separation gap 35, that is, the material passes through the first separation gap from the outside of the first separator 3 to the first separation chamber 31, and then moves toward one end along the length direction of the second separator 4, passes through the third separation gap 35 between the second separator 4 and the first separator 3, and the through hole 43 to reach the second separation chamber 41, and finally is discharged through the discharge port 2 connected to the second separation chamber 41.

[0036] Since the surface area of ​​the second separator 4 is smaller than that of the first separator 3, the pressure in the first separation chamber 31 increases during separation, which reduces the separation flow rate and leads to low separation efficiency. Moreover, the pressure in the first separation chamber 31 increases, which leads to the risk of separation failure under the pressure squeeze of the second separator 4. The second separation channel is formed by the third separation gap 35 and the through hole 43 connected to the first separation chamber 31 in the axial direction, that is, at one end of the length direction of the second separation chamber 41, to increase the separation flow and reduce the pressure of the first separation chamber. At the same time, since the mass of the grinding balls is much larger than the diameter and mass of the material during separation, even if a small amount of grinding balls enter the first separation chamber 31, they are basically moved to the bottom of the first separation chamber 31 by their own gravity, and the second separation chamber 41 keeps the grinding balls away from the discharge port 2, which can also reduce the grinding balls that may be in the first separation chamber 31 from entering the second separation chamber 41 for discharge. Thus, the separation flow can be guaranteed and the ball leakage phenomenon can be reduced.

[0037] According to the needs, in order to reduce the grinding balls entering the first separation chamber 31 from entering the second separation chamber 41 and being discharged from the discharge port 2, which not only causes ball leakage, but also pollutes the discharged materials. A ball blocking mechanism 8 is provided in the second separation channel, and the ball blocking mechanism 8 is preferably arranged at the end of the second separator 4. The ball blocking mechanism 8 includes a second spoiler 82 extending radially toward the second separator 4 and a first spoiler 81 extending radially toward the first separator 3. The first spoiler 81 and the second spoiler 82 are misaligned to form a spoiler channel, which is connected to the third separation gap 35. The cross section of the spoiler channel is an S-shaped structure. When the slurry moves along the spoiler channel, it can block the grinding balls with larger mass or diameter, thereby preventing the grinding balls that may enter the first separation chamber 31 from entering the third separation gap 35 and then entering the second separation chamber 42 through the through hole 43 to reach the discharge port, thereby realizing secondary separation of the grinding balls.

[0038] As required, the first spoiler 81 is arranged at the end of the second separator 4, wherein the multi-stage separation device and the first spoiler 81 are located from far to near the discharge port 2, that is, the first spoiler 81 is located on one side, and the second spoiler 82 is located outside the first spoiler 81. As required, the ball blocking mechanism 8 can be arranged in multiple length directions of the first separation chamber 31, which can prevent the grinding balls entering the first separation chamber from being focused near the ball blocking mechanism 8 when there is one ball blocking mechanism 8, causing blockage and affecting the slurry flow and flow rate in the second separation channel.

[0039] In order to better collect the grinding balls that may enter the first separation chamber 31, the multi-stage separation device is also provided with a grinding ball sorting mechanism, which includes a grinding ball sorting chamber 5 connected to the first separation chamber 31, and the grinding ball sorting chamber 5 is provided with a ball discharge hole (not shown in the figure) and a switch 6 for controlling the ball discharge hole. In order to ensure that the grinding balls entering the first separation chamber 31 can gather in the grinding ball sorting chamber 5, the bottom of the grinding ball sorting chamber 5 is lower than the first separation chamber 31, and the grinding ball sorting chamber 5 can be set to be inclined toward the discharge port 2. When there are more grinding balls in the grinding ball sorting chamber 5, the grinding balls are discharged through the ball discharge hole by turning on the switch 6. The grinding ball sorting chamber 5 surrounds the pipe provided with the discharge port 2.

[0040] The second separator 4 gradually increases in radial direction at the end of the through hole 43 , and may be configured as a trumpet-shaped structure, which can both increase the flow rate of the second separation channel and prevent the grinding balls that may enter the first separation chamber 31 from entering the second separation chamber 41 .

[0041] According to the needs, an ultrasonic vibration component 7 is provided in the first separation chamber 31, and the ultrasonic vibration component 7 transmits energy to the slurry in the first separation chamber 31, which can reduce the aggregation of ultrafine separation materials on the one hand, and reduce the blockage on the surface of the first separator 3 and the second separator 4. In addition, the grinding balls that may enter the first separation chamber 31 can be dosed to accelerate the deposition at the bottom of the first separation chamber or the aggregation to the grinding ball sorting chamber 5. The ultrasonic vibration component 7 can adopt the existing technology, such as a vibration rod and an ultrasonic generator that generates vibration to the vibration rod or around the vibration rod.

[0042] The heat generated by the vibration rod can be avoided. The separation device also includes a water cooling device for cooling the temperature. The water cooling device includes a water cooling pipe. On the one hand, it can reduce the heat generated by grinding and reduce the aggregation of ultrafine materials. On the other hand, it can reduce the working temperature of the ultrasonic vibration component 7 and extend the service life.

[0043] As required, a sealing gasket 34 is provided between the cover 33 and the first separator 3 , and the sealing gasket 34 improves the sealing performance of the first separator 3 in the length direction.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage separation device based on wet ball milling, characterized in that: The multi-stage separation device comprises a first separator provided with a cavity and a second separator located in the cavity of the first separator, the second separator divides the cavity of the first separator into a first separation cavity and a second separation cavity connected with the discharge port, the first separation cavity is located between the first separator and the second separator, the second separation cavity is located in the second separator, the second separation cavity is connected with the first separation cavity radially and axially to form a first separation channel and a second separation channel respectively, the end and radial direction of the first separator are respectively provided with a cover that closes the first separator cavity axially and a first separation gap that connects the inside and outside of the first separator, wherein a third separation gap that connects the first separation cavity and the second separation cavity is provided between the cover and the end of the second separator; the end and radial direction of the second separator are respectively provided with a through hole and a second separation gap, the second separation gap connects the second separation cavity and the first separation cavity, the through hole connects the second separation cavity and the first separation cavity through the third separation gap, the second separation channel comprises a third separation gap that connects the first separation gap and the second separation cavity, wherein the third separation gap is connected with the second separation cavity in the axial direction, and an ultrasonic vibration component is provided in the first separation cavity.

2. The multi-stage separation device based on wet ball milling according to claim 1, characterized in that: The first separation channel includes a second separation cavity radially connected to the first separation gap and the second separation gap.

3. The multi-stage separation device based on wet ball milling according to claim 1, characterized in that: The second separation channel is provided with a ball blocking mechanism.

4. The multi-stage separation device based on wet ball milling according to claim 3, characterized in that: The ball blocking mechanism comprises a second spoiler plate extending radially toward the second separator and a first spoiler plate extending radially toward the first separator. The first spoiler plate and the second spoiler plate are staggered to form a spoiler channel.

5. The multi-stage separation device based on wet ball milling according to claim 4, characterized in that: The first spoiler is close to one side of the discharge port, and the second spoiler is located outside the first spoiler.

6. The multi-stage separation device based on wet ball milling according to claim 1, characterized in that: The multi-stage separation device is also provided with a grinding ball sorting mechanism, which includes a grinding ball sorting chamber connected to the first separation chamber, and the grinding ball sorting chamber is provided with a ball discharge hole and a switch for controlling the ball discharge hole.

7. The multi-stage separation device based on wet ball milling according to claim 6, characterized in that: The bottom of the grinding ball sorting chamber is lower than the first separation chamber.

8. The multi-stage separation device based on wet ball milling according to claim 7, characterized in that: The bottom of the grinding ball sorting cavity is inclined toward the discharge port.

9. The multi-stage separation device based on wet ball milling according to claim 1, characterized in that: The ultrasonic vibration component includes a vibration rod and an ultrasonic generator for generating vibrations toward the vibration rod or around the vibration rod.

10. The multi-stage separation device based on wet ball milling according to claim 9, characterized in that: The multi-stage separation device also includes a water cooling pipe for cooling the temperature.

11. The multi-stage separation device based on wet ball milling according to any one of claims 1 to 10, characterized in that: The first separator and the second separator are cylindrical structures, and the first separator and the second separator are coaxially arranged.

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