Water supply device and magnetic microfluidic concentration device with the same

Abstract

The application provides a water supply device and a magnetic micro-fluidic sorting device with the water supply device. The water supply device comprises a water distributor, a nested conveying pipe and a plurality of water supply pipes. The water distributor is internally provided with a plurality of cavities which are mutually separated. Each cavity is provided with a discharge structure for discharging water to different positions. The conveying channel of the nested conveying pipe corresponds to and communicates with the cavities. Each conveying channel is communicated with at least one water supply pipe for conveying water into each cavity. The water supply pipe which communicates with the conveying channel supplies water into the cavity which communicates with the conveying channel. The water is discharged to different positions and different heights through the discharge structure arranged on each cavity, thereby solving the problem that it is difficult to arrange the pipelines for supplying water to different positions and in different ways in the sorting cylinder.

Description

Technical Field

[0001] This invention relates to the field of magnetic separation technology, and more specifically, to a water supply device and a magnetic microfluidic separation device having the water supply device. Background Technology

[0002] The magnetic microfluidic separator is a type of magnetic metal ore beneficiation equipment used in desliming, desiliconization, and wet magnetic separation. It is used for desliming and desiliconizing minerals, improving mineral grade, or coarsening the feed particle size while maintaining a certain grade. The magnetic microfluidic separator mainly consists of a feed trough, overflow trough, separation cylinder, magnetic system, outer casing, water supply system, concentrate valve, overflow sensor, concentrate sensor, and control cabinet. The working principle is that the magnetic system generates a magnetic field inside the separation cylinder. The slurry is then fed into the feed trough, and through the feed trough, the slurry is fed circumferentially along the wall of the separation cylinder. Upon entering the separation cylinder, the magnetic particles are subjected to magnetic force, water jet force, buoyancy, and gravity, descending to the bottom of the lower cone and being discharged through the concentrate valve to form concentrate. Non-magnetic or intergrowth impurities overflow upwards from the center of the separation cylinder along the overflow inner cylinder, forming tailings. This ultimately creates a separation mechanism where the slurry overflows from the center around the perimeter.

[0003] Currently, the layout of the water supply pipeline inside the equipment is difficult. The water supply system can only inject water directly through the water inlet set on the equipment shell, and water can only be injected into one location inside the equipment. At the same time, with the flow of water, the upward force of the water inside the equipment may be too large or too small. If the upward force of the water is too large, it will cause the turbulence phenomenon, resulting in the loss of concentrate and increasing the amount of regrinding. If the upward force of the water is too small, the separation effect will be poor and the concentrate grade will be reduced. Summary of the Invention

[0004] In view of this, the present invention proposes a water supply device and a magnetic microfluidic purification device having the water supply device, aiming to solve the problem that the existing equipment has difficult water supply pipeline layout and can only inject water into one position inside the equipment.

[0005] On one hand, the present invention proposes a water supply device, which includes: a water distributor, a nested conveying pipe, and a plurality of water supply pipes; wherein, the water distributor is provided with a plurality of mutually isolated cavities, and each cavity is provided with a discharge structure for draining water to different locations; the conveying channels of the nested conveying pipe correspond one-to-one with and are connected to the cavities, and each conveying channel is connected to at least one water supply pipe for conveying water to each cavity.

[0006] Furthermore, in the above-mentioned water supply device, the drainage structure is a water outlet hole provided on the side wall of the water distributor or a plurality of water distribution branch pipes provided on the side wall of the water distributor, and the side wall of the water distribution branch pipe is provided with a drainage hole; each of the water distribution branch pipes is arranged radially along the water distributor, and the drainage holes are staggered along the side wall of the water distribution branch pipe.

[0007] Furthermore, in the aforementioned water supply device, each of the water supply pipes is arranged radially along the water distributor, and the water supply pipes are separated from each other by a water baffle plate.

[0008] The water supply device provided by this invention supplies water to the cavities connected to the conveying channel through a water supply pipe. Drainage structures on each cavity drain water to different positions and heights, effectively improving the uniformity of water supply. Furthermore, the water flow rate in each conveying channel can be controlled by adjusting the water flow rate through the water supply pipe, thereby controlling the drainage rate of the drainage structures on each cavity. This means controlling the water injection rate at different heights and positions within the water supply system. In other words, it allows for precise control of the water flow in different parts of the sorting cylinder, solving the problem of difficult pipeline layout for water supply at different positions and in different ways within the equipment, especially the sorting cylinder. Controlling the water injection rate at different positions within the sorting cylinder also prevents the upward force of the water from being too large or too small, thus avoiding the loss of concentrate, effectively preventing overflow tailings and large amounts of iron loss, and improving the concentrate grade, achieving the purpose of precise sorting.

[0009] On the other hand, the present invention also proposes a magnetic microfluidic purification device, which is equipped with the above-mentioned water supply device.

[0010] Furthermore, in the aforementioned magnetic microfluidic sorting device, the buffer includes: a buffer cylinder; wherein, a buffer enclosure is provided around the entire outer periphery of the buffer cylinder, and an annular buffer structure is provided between the buffer cylinder and the buffer enclosure; the top wall of the buffer cylinder is provided with an inclined perforated plate arranged around its entire circumference, which has an inlet hole for discharging the slurry overflowing from the buffer cylinder into the annular buffer structure or the sorting device.

[0011] Furthermore, in the aforementioned magnetic microfluidic sorting equipment, the overflow device includes: an overflow inner cylinder and an external overflow trough; wherein, the overflow inner cylinder is disposed within the sorting device to receive tailings flowing upward with the water flow within the sorting device; the external overflow trough is disposed along the outer periphery of the sorting device at the upper part of the sorting device, and the external overflow trough is connected to the overflow inner cylinder to receive tailings overflowing from the overflow inner cylinder; the external overflow trough is an integral annular structure, which is sleeved and connected to the outer wall of the sorting device; or, the external overflow trough includes multiple arc-shaped groove structures disposed along the outer periphery of the sorting device.

[0012] Furthermore, in the aforementioned magnetic microfluidic refining equipment, the external overflow trough is equipped with a flow guiding structure to guide the tailings so that they collect at the outlet of the external overflow trough and are discharged. Furthermore, in the aforementioned magnetic microfluidic refining equipment, the bottom end of the overflow inner cylinder is equipped with a flow guiding cylinder to guide the tailings and water flow so that they collect inside the overflow inner cylinder.

[0013] Furthermore, the aforementioned magnetic microfluidic refining equipment further includes: a feeding device, a sorting device, and an overflow device; wherein, the feeding device is located above and connected to the sorting device for conveying slurry into the sorting device; the sorting device provides a magnetic field to cause ferromagnetic minerals in the slurry to move downwards under the influence of their own gravity and the magnetic field; the water supply device is located above and connected to the sorting device for providing liquid to the sorting device to allow tailings in the slurry to flow upwards with the water flow; the overflow device is located above and connected to the sorting device for receiving and discharging tailings overflowing from the sorting device.

[0014] Furthermore, in the aforementioned magnetic microfluidic refining equipment, the feeding device includes: a feeding trough, a feeding pipe, and a buffer; wherein, the buffer is disposed within the feeding trough, and is disposed directly below the slurry inlet of the feeding trough, for receiving and buffering the slurry discharged from the slurry inlet.

[0015] Because the water supply device has the above-mentioned effects, the magnetic microfluidic purification equipment with the water supply device also has the corresponding technical effects.

[0016] Furthermore, in the magnetic microfluidic sorting equipment provided in this invention, both the overflow device and the water supply device are located at the top of the sorting device. In particular, the external overflow trough of the overflow device is fixed to the outside of the sorting device through an external structure, which effectively reduces the equipment height and saves installation space compared to placing it at the top. Moreover, the feeding device uses a buffer to buffer the slurry discharged from the feeding trough, effectively buffering the impact of the slurry and ensuring that the slurry is evenly dispersed into the sorting device, resisting fluctuations in the slurry volume, thereby obtaining high-grade concentrate and effectively preventing the phenomenon of large amounts of iron loss from overflow tailings. At the same time, this equipment is simple and easy to implement, effectively achieving high efficiency and large-scale operation, with good working stability, high degree of intelligence, and simple operation, facilitating the sorting of slurry. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the water supply device provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the magnetic microfluidic refining device provided in an embodiment of the present invention;

[0020] Figure 3 This is a top view of the magnetic microfluidic selection device provided in an embodiment of the present invention;

[0021] Figure 4 This is another structural schematic diagram of the magnetic microfluidic selection device provided in an embodiment of the present invention;

[0022] Figure 5 Another top view structural schematic diagram of the magnetic microfluidic selection device provided in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the inclined perforated plate provided in an embodiment of the present invention. Detailed Implementation

[0024] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example of a water supply device:

[0026] See Figures 1 to 5 The figure shows a schematic diagram of the water supply device provided in an embodiment of the present invention. As shown, the water supply device 1 includes: a water distributor 11, a nested delivery pipe 12, and a plurality of water supply pipes 13; wherein,

[0027] The water distributor 11 contains several mutually separated cavities 111, and each cavity 111 is equipped with a discharge structure for draining water to different locations, i.e., discharging water from different positions. In specific implementations, the water distributor 11 can be a hollow cylinder closed at both ends, with several dividing plates 112 arranged along its length to divide the interior of the water distributor 11 into several cavities 111. There are at least two cavities 111, but the arrangement of the cavities 111 can also be in other ways, such as a four-square grid or a nine-square grid. In this embodiment, the arrangement of each cavity 111 along the length of the water distributor 11 is used as an example to facilitate water injection to different heights, positions, and directions of the equipment. In particular, water can be injected to different heights and positions of the sorting device 3 of the magnetic microfluidic sorting equipment, thereby avoiding uneven water flow caused by the concentration of water flow in the sorting cylinder 31 of the sorting device 3. The top of the water distributor 11 can be a conical structure 115 that is smaller at the top and larger at the bottom, or a flat-top structure. Of course, it can also be other structures. In this embodiment, no limitation is made on it.

[0028] The nested delivery pipe 12 has at least two layers of delivery channels 121, which correspond one-to-one with and are connected to the cavities 111. Each delivery channel 121 is connected to at least one water supply pipe 13 for delivering water to each cavity 111. In specific implementations, there are at least two water supply pipes 13, which can be distributed in a radiating pattern along the circumference of the nested delivery pipe 12. This embodiment uses a single ring of water supply pipes 13 as an example, but two or more rings can also be provided. Each water supply pipe 13 can be independent of each other or integrated and separated by a water baffle 131 to independently deliver water. Alternatively, some water supply pipes 13 can be independent, especially those supplying water to different delivery channels 121. This embodiment does not impose any limitations on this. Figure 4 As shown, each water supply pipe 13 is connected to only one of the delivery channels 121. Of course, as... Figure 1 and Figure 2 As shown, the water supply pipe 13 is connected to one or more of the conveying channels 121, or a combination of both. This embodiment does not impose any limitations on this. To facilitate the control of the conveying speed and water volume of each conveying channel 121, preferably, the water supply pipe 13 can correspond one-to-one with and be connected to the conveying channel 121.

[0029] The end of the water supply pipe 13 furthest from the delivery pipe 12 (e.g. Figure 1 The right end of the water supply pipe 13 shown on the right can be connected to a control valve 15 to isolate or connect the water supply pipe 13 and the water supply equipment. The other end of the water supply pipe 13 (e.g., Figure 1The left end of the right-side water supply pipe 13 shown can be directly connected to the conveying channel 121, or it can be connected through the connecting pipe 14. The connecting pipe 14 can be inclined to connect the conveying channel 121 and the water supply pipe 13, which are set at intervals, especially between the outer conveying channel 121 and the water supply pipe 13.

[0030] In this embodiment, the nested delivery pipe 12 may include a central pipe 122 and a plurality of outer pipes 123 nested radially around the central pipe 122, forming a plurality of delivery channels 121. Each delivery channel 121 corresponds one-to-one with a cavity 111, and the corresponding delivery channel 121 is connected to the cavity 111. To facilitate communication between the delivery channels 121 and the cavity 111, preferably, from the axis of the central pipe 122 towards its outer periphery, the ends of the central pipe 122 and the plurality of outer pipes 123 gradually shorten. That is, the ends of the central pipe 122 are positioned outside the outer pipes 123 extending beyond it. Between any two outer pipes 123, the outermost outer pipe 123 extends beyond the innermost outer pipe 123, so that the lower ends of the central pipe 122 and the plurality of outer pipes 123 (relative to the lower end of the central pipe 122 and the plurality of outer pipes 123) are positioned outside the outermost outer pipe 123. Figure 1 (As shown in the position) it is sequentially connected to the cavity 111 from bottom to top.

[0031] See also Figure 1 The drainage structure can be a water outlet 113 on the side wall of the water distributor 11 or a water distribution branch pipe 114 on the side wall of the water distributor 11, with a drain hole on the side wall of the water distribution branch pipe 114. In specific implementation, there can be multiple water distribution branch pipes 114, which are distributed in a radiating pattern along the circumference of the water distributor 11 to inject water into different positions around the water distributor 11. Alternatively, multiple rings can be arranged along the axial direction of the water distributor 11 to inject water into different height positions of the sorting cylinder 31. Each water distribution branch pipe 114 is connected to its corresponding cavity 111 to inject water into the sorting cylinder 31 through the drain hole on the water distribution branch pipe 114. The drain holes on the water distribution branch pipe 114 can be arranged alternately along the side wall of the water distribution branch pipe 114. In this embodiment, the upper cavity 111 is connected to the water branch pipe 114, and the side wall of the lower cavity 111 drains water through the water outlet 113. That is, the side wall of the lower cavity 111 is a perforated plate or a sieve plate to achieve drainage at different positions and different heights. Of course, other methods can also be used. For example, each cavity 111 can drain water through the water outlet 113, or they can all drain water through the water branch pipe 114. This embodiment does not impose any limitations on these methods.

[0032] In summary, the water supply device provided in this embodiment supplies water to the cavities 111 connected to the conveying channel 121 through the water supply pipe 13 connected to the conveying channel 121, and drains water to different positions and heights through the drainage structures set on each cavity 111, thereby effectively improving the uniformity of water supply. Furthermore, the water flow rate in each conveying channel 121 can be controlled by controlling the water flow rate delivered through the water supply pipe 13, thereby controlling the drainage speed of the drainage structures on each cavity 111. That is, the water injection speed at different heights and positions of the water supply system can be controlled. In other words, the water flow in each part of the sorting cylinder 31 can be precisely controlled, solving the problem of difficult pipeline layout for water supply at different positions and in different ways in the equipment, especially the sorting cylinder 31. Moreover, controlling the water injection speed at different positions in the sorting cylinder 31 can avoid the upward force of the water being too large or too small, thereby avoiding the loss of concentrate, effectively preventing the overflow of tailings and the large amount of iron runoff, and improving the concentrate grade, thus achieving the purpose of precise sorting. Of course, this water supply device can be applied not only to magnetic microfluidic separation equipment, but also to other equipment that requires water injection, such as magnetic separation columns. This embodiment does not impose any limitations on it.

[0033] Example of magnetic microfluidic selection device:

[0034] See Figures 1 to 5 The figure illustrates a preferred structure of the magnetic microfluidic sorting device provided in the embodiment. As shown, this embodiment also proposes a magnetic microfluidic sorting device, which includes: a water supply device 1, a material supply device 2, a sorting device 3, and an overflow device 4; wherein,

[0035] The feeding device 2 is positioned above and connected to the sorting device 3 to feed slurry into the sorting device 3. The sorting device 3 provides a magnetic field to cause the ferromagnetic minerals (concentrate) in the slurry to move downwards under the influence of their own gravity and the magnetic field. In specific implementation, the feeding device 2 can be positioned at the top of the sorting device 3 and connected to the top of the sorting device 3 (relative to the top of the sorting device 3). Figure 2 The feed inlet 311 (as shown in the figure) is connected to the feed slurry 2 so that the slurry discharged from the feed device 2 falls to the bottom of the sorting device 3 under the action of gravity. At the same time, the sorting device 3 is used to provide a magnetic field so that the ferromagnetic minerals in the slurry in the sorting device 3 move downward under the action of their own gravity and magnetic field and can flow out from the bottom of the sorting device 3.

[0036] The water supply device 1 is located above and connected to the sorting device 3, and is used to supply liquid to the sorting device 3. In a specific implementation, the water supply device 1 can be located on the side wall of the sorting device 3 and below the feeding device 2, to supply liquid into the interior of the sorting device 3, so that the tailings in the slurry inside the sorting device 3 can flow upwards with the water flow under the action of buoyancy. Positioning the water supply device 1 below the feeding device 2 effectively reduces the equipment height and saves installation space.

[0037] The overflow device 4 is located on the upper part of the sorting device 3 and is connected to the sorting device 3 to receive and discharge the tailings overflowing from the sorting device 3. In specific implementation, the overflow device 4 can be located on the side wall of the sorting device 3 and below the water supply device 1 to avoid the water supply device 1 interfering with the overflow, and at the same time, it can effectively reduce the height of the equipment and save installation space.

[0038] See also Figures 1 to 5 The feeding device 2 includes: a feeding trough 21, a feeding pipe 22, and a buffer 23; wherein,

[0039] A buffer 23 is installed inside the feed trough 21, directly below the slurry inlet of the feed trough 21. It receives and buffers the slurry discharged from the inlet, effectively cushioning the slurry impact and ensuring its uniform distribution within the sorting device 3. This resists fluctuations in slurry volume, resulting in high-grade concentrate and effectively preventing excessive iron runoff from overflowing tailings. Specifically, to enhance the buffering effect of the buffer 23, a feed pipe 22 is preferably provided at the slurry inlet to directly discharge the slurry into the buffer 23. This avoids the slurry being discharged directly into the sorting device 3 after entering other parts of the feed trough 21, ensuring that all slurry discharged from the inlet enters the buffer 23 for buffering. The slurry inlet can be located in the middle of the top wall of the feed trough 21.

[0040] In this embodiment, the feed trough 21 can be a hollow cylinder for receiving slurry; preferably, the top of the feed trough 21 (relative to the top of the cylinder) is... Figure 2 The position shown can be an open end, which is equipped with a cover plate to prevent other materials from accidentally entering the feed trough 21, and at the same time, to prevent materials from splashing to the outside of the feed trough 21.

[0041] See also Figures 1 to 5 The buffer 23 includes: a buffer cylinder 231, a buffer enclosure 232, and a perforated plate 233; wherein,

[0042] The buffer cylinder 231 is surrounded by a buffer plate 232, and an annular buffer structure 234 is provided between the buffer cylinder 231 and the buffer plate 232. In a specific implementation, the buffer cylinder 231 is a hollow cylinder with at least one open end (e.g., Figure 1 The buffer plate 232 (with at least an opening at the top) is placed inside and coaxially arranged with the feed trough 21 to receive the slurry discharged from the feed pipe 22. The buffer plate 232 can be a hollow cylinder with at least one open end (e.g., Figure 1The buffer enclosure 232 (with at least an opening at the top) is coaxially fitted around the outside of the buffer cylinder 231, so that an annular buffer structure 234 is formed between the two. The outer periphery of the buffer enclosure 232 is connected to the ore inlet 311 to discharge the overflow slurry from the annular buffer structure 234 into the sorting device 3. The height of the buffer enclosure 232 is lower than the height of the buffer cylinder 231.

[0043] The top wall of the buffer cylinder 231 is provided with an inclined perforated plate 233 arranged around its circumference, which has an inlet hole 2331 for discharging the slurry overflowing from the buffer cylinder 231 into the annular buffer structure 234 or the sorting device 3. In a specific implementation, the inclined perforated plate 233 can be a grate, which has a frustum-shaped structure with a high center and low periphery, and has a through hole in the center to fit around the outer periphery of the buffer cylinder 231. The inclined perforated plate 233 and the top of the buffer enclosure 232 are spaced apart so that the slurry in the annular buffer structure 234 overflows from the top of the buffer enclosure 232 and between the grate to the outer periphery of the buffer enclosure 232, and then is discharged into the sorting device 3 through the inlet 311. Of course, the slurry overflowing from the buffer cylinder 231 can also be directly discharged into the sorting device 3. At the same time, the inclined perforated plate 233 can also screen large-diameter particles so that they remain in the feed trough 21 around the inclined perforated plate 233. Figure 2 In the diagram, the dashed lines with arrows indicate the flow direction of the slurry. In this embodiment, as shown... Figure 6 As shown, the inclined orifice plate 233 has an inlet hole 2331 only directly above the annular buffer structure 234, so that all the slurry is discharged into the annular buffer structure 234. Of course, inlet holes 2331 can also be provided on all radial sides of the inclined orifice plate 233 so that the slurry is discharged into the annular buffer structure 234 and the sorting device 3.

[0044] The inclined orifice plate 233 can also be set at the ore inlet 311 to perform buffer screening before the slurry enters the separation cylinder 31.

[0045] See also Figures 1 to 5 The sorting device 3 includes: a sorting cylinder 31, an outer cover 32, and a magnetic system 33; wherein,

[0046] The magnetic system 33 is arranged circumferentially on the outer wall of the sorting cylinder 31 to generate a magnetic field inside the sorting cylinder 31. In a specific implementation, the sorting cylinder 31 can be a hollow cylinder with an inlet 311 at the top for discharging slurry. In this embodiment, the inlet 311 is an annular hole structure and is arranged along the outer periphery of the buffer plate 232 so that the slurry overflowing from the buffer plate 232 is discharged into the sorting cylinder 31 through the inlet 311, thereby realizing the sorting of slurry feeding around the periphery and overflowing from the center. The inlet 311 can also be a structure of multiple arc-shaped holes. To improve the stability of the magnetic system 33, preferably, the magnetic system 33 is fixed to the outer wall of the sorting cylinder 31 by an outer cover 32. An outer cover 32 can be provided on the outer wall of the sorting cylinder 31 so that the magnetic system 33 is coaxially fixed in the closed space enclosed between the outer cover 32 and the sorting cylinder 31. To facilitate the overflow of tailings within the sorting cylinder 31, preferably, the top of the sorting cylinder 31 extends beyond the outer cover 32, allowing the tailings to overflow through the top sidewall of the sorting cylinder 31. Therefore, an external overflow port is provided above the outer cover 32 at the top of the sorting cylinder 31 for discharging tailings. Multiple external overflow ports can be provided along the circumference of the sorting cylinder 31 to facilitate simultaneous tailings discharge from multiple locations. To prevent excessive iron loss from the tailings, preferably, an overflow sensor 36 is provided at or below the external overflow port to detect parameters such as the grade and concentration of minerals within the tailings.

[0047] In this embodiment, the sorting cylinder 31 is a hollow cylinder. To facilitate the collection of ferromagnetic minerals, preferably, the bottom of the sorting cylinder 31 is provided with an inverted conical structure 34, and the bottom end of the inverted conical structure 34 is provided with a discharge port 341 for discharging the sorted ferromagnetic minerals. More preferably, a concentrate sensor 35 is provided above the discharge port 341 for measuring relevant parameters such as the grade and concentration of ferromagnetic minerals. The discharge port 341 may be provided with a concentrate valve 37 for controlling the opening and closing of the discharge port 341, thereby controlling the discharge of ferromagnetic minerals, i.e., concentrate.

[0048] See also Figures 1 to 5 The overflow device 4 includes: an inner overflow cylinder 41 and an external overflow trough 42; wherein,

[0049] An overflow inner cylinder 41 is installed inside the sorting device 3 to receive tailings flowing upward with the water flow within the sorting device 3. In a specific implementation, the overflow inner cylinder 41 can be coaxially installed at the top of the sorting cylinder 31, and the overflow inner cylinder 41 is positioned above the water feeder 11 to guide the tailings through the conical structure 115 at the top of the water feeder 11, so that they flow into the overflow inner cylinder 41 to form a central overflow around the feeder.

[0050] An external overflow trough 42 is installed along the outer periphery of the sorting device 3 and connected to the upper part of the sorting device 3. The external overflow trough 42 is connected to the overflow inner cylinder 41 to receive the tailings overflowing from the overflow inner cylinder 41. In specific implementation, the external overflow trough 42 and the overflow inner cylinder 41 can be connected by several overflow pipes 43. Each overflow pipe 43 can be arranged radially along the overflow inner cylinder 41, i.e., the overflow pipes 43 are distributed in a radiating pattern, with one end (e.g., ...)... Figure 2 The end of the overflow pipe 43 (as shown) near the axis of the overflow inner cylinder 41 is connected to the inner overflow hole 411 opened on the side wall of the overflow inner cylinder 41, and passes through the outer overflow port opened on the side wall of the sorting cylinder 31 before being connected to or inserted into the external overflow trough 42. Preferably, the overflow pipe 43 is evenly distributed along the circumference of the overflow inner cylinder 41, so a plurality of inner overflow holes 411 corresponding one-to-one with the overflow pipe 43 are evenly provided on the side wall of the overflow inner cylinder 41 along its axial direction.

[0051] An external overflow trough 42 is equipped with a tailings pipe 44 for discharging tailings from the trough. Specifically, an outlet can be provided on the bottom wall of the external overflow trough 42, and the tailings pipe 44 can be connected to the outlet. To prevent tailings accumulation at the bottom of the external overflow trough 42, preferably, a guide structure 421 is provided on the external overflow trough 42 to guide the tailings to the outlet for discharge. The guide structure 421 can be a guide plate inclined towards the outlet, which also serves as the bottom plate of the external overflow trough 42. The guide structure 421 can also be other structures provided at the bottom of the external overflow trough 42; this embodiment does not impose any limitations on these structures.

[0052] In this embodiment, the overflow inner cylinder 41 can be a hollow cylinder with at least one open end, with its bottom end being the open end so that the tailings can flow upward with the water flow into the overflow inner cylinder 41 from the open end; the top end can be either an open end or a closed end, and it can be fixed to the top wall of the sorting cylinder 31 of the sorting device 3 through the side wall or the top wall, or it can be directly fixed to the bottom wall of the feed trough 21 to achieve the fixation of the overflow inner cylinder 41. In order to facilitate the guidance of the flow of tailings, preferably, the bottom end of the overflow inner cylinder 41 is provided with a guide cylinder 412 to guide the tailings and water flow so that they are collected into the overflow inner cylinder 41.

[0053] See also Figures 2 to 3 In one embodiment of this invention, the external overflow trough 42 can be an integral annular structure, which is sleeved and connected to the outer wall of the sorting device 3. The bottom plate of the external overflow trough 42 is provided with an outlet connected to the tailings pipe 44, and the bottom plate of the external overflow trough 42 is inclined towards the tailings pipe 44.

[0054] See also Figures 4 to 5In another embodiment of this invention, the external overflow trough 42 includes multiple arc-shaped trough structures 422 arranged along the outer periphery of the sorting device 3, i.e., a circumferential split structure. Each arc-shaped trough structure 422 is evenly arranged along the outer wall of the sorting device 3, and each arc-shaped trough structure 422 is individually connected to the overflow inner cylinder 41 through one or more overflow pipes 43. Each arc-shaped trough structure 422 is individually provided with a tailings outlet connected to a tailings pipe 44 for discharging tailings from the arc-shaped trough structure 422. Furthermore, the bottom plate of each arc-shaped trough structure 422 is inclined towards its outlet to allow tailings to collect at the outlet.

[0055] The specific implementation process of water supply device 1 can be found in the above description, and will not be repeated here in this embodiment.

[0056] Since the water supply device 1 has the above-mentioned effects, the magnetic microfluidic purification equipment with the water supply device 1 also has the corresponding technical effects.

[0057] Furthermore, in the magnetic microfluidic refining equipment provided in this embodiment, both the overflow device 4 and the water supply device 1 are located on the upper part of the sorting device 3. In particular, the external overflow trough 42 of the overflow device 4 is fixed to the outside of the sorting device 3 through an external structure, which can effectively reduce the height of the equipment and save installation space. Moreover, the feeding device 2 buffers the slurry discharged from the feeding trough 21 through the buffer 23 to effectively buffer the impact of the slurry, so that the slurry is evenly dispersed into the sorting device 3, resisting the fluctuation of the slurry volume, thereby obtaining high-grade concentrate, and effectively preventing a large amount of iron from being lost in the overflow tailings. At the same time, the equipment is simple and easy to implement, which can effectively realize the high efficiency and large scale of the equipment, and has good working stability, high degree of intelligence, simple operation, and facilitates the sorting of slurry.

[0058] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A magnetic microfluidic refining device, characterized in that, Install water supply device (1); It also includes: a feeding device (2), a sorting device (3), and an overflow device (4); among which, The feeding device (2) is located above the sorting device (3) and connected to the sorting device (3) for conveying slurry into the sorting device (3); The sorting device (3) is used to provide a magnetic field so that the ferromagnetic minerals in the slurry in the sorting device (3) move downward under the action of their own gravity and the magnetic field; The water supply device is located at the top of the sorting device (3) and is connected to the sorting device (3) to provide liquid to the sorting device (3) so that the tailings in the slurry in the sorting device (3) can flow upward with the water flow. The overflow device (4) is located on the upper part of the sorting device (3) and is connected to the sorting device (3) to receive and discharge the tailings overflowing from the sorting device (3); The overflow device (4) includes: an overflow inner cylinder (41) and an external overflow trough (42); wherein, The overflow inner cylinder (41) is installed inside the sorting device (3) to receive the tailings flowing upward with the water flow inside the sorting device (3); the overflow inner cylinder (41) is coaxially installed at the top of the sorting cylinder (31) of the sorting device (3), and the overflow inner cylinder (41) is installed above the water separator (11). The tailings are guided by the conical structure (115) at the top of the water separator (11) so that they flow into the overflow inner cylinder (41) to form an overflow from the center of the feed ore around the perimeter; The external overflow trough (42) is arranged on the upper part of the sorting device (3) along the outer periphery of the sorting device (3), and the external overflow trough (42) is connected to the overflow inner cylinder (41) to receive the tailings overflowed from the overflow inner cylinder (41). The external overflow trough (42) is an integral ring structure, which is sleeved and connected to the outer wall of the sorting device (3); or, the external overflow trough (42) includes a plurality of arc-shaped groove structures (422) arranged along the outer periphery of the sorting device (3). The external overflow trough (42) is provided with a flow guiding structure (421) to guide the tailings so that they are collected at the outlet of the external overflow trough (42) and discharged. The bottom end of the overflow inner cylinder (41) is provided with a guide cylinder (412) to guide the tailings and water flow so that they are collected into the overflow inner cylinder (41). The feeding device (2) includes: a feeding trough (21) and a buffer (23); wherein, The buffer (23) is disposed in the feed trough (21), and the buffer (23) is located directly below the slurry inlet of the feed trough (21) to receive the slurry discharged from the slurry inlet and buffer it. The buffer (23) includes: a buffer cylinder (231); wherein, The buffer cylinder (231) is surrounded by a buffer plate (232), and an annular buffer structure (234) is provided between the buffer cylinder (231) and the buffer plate (232) to receive the slurry overflowing from the buffer cylinder (231); The top wall of the buffer cylinder (231) is provided with an inclined perforated plate (233) arranged around its circumference, which has an inlet hole (2331) for discharging the slurry overflowing from the buffer cylinder (231) into the annular buffer structure (234) or the sorting device (3) for buffering and screening the slurry. The water supply device includes: a water distributor (11), a nested delivery pipe (12), and several water supply pipes (13); wherein, The water distributor (11) has several mutually separated cavities (111), and each cavity (111) has a discharge structure for draining water to different locations; the water distributor (11) is a hollow cylinder closed at both ends, and its interior has several partition plates (112) along its length to divide the water distributor (11) into several cavities (111) along its length for injecting water to different heights and positions of the sorting device (3) of the magnetic microfluidic sorting equipment; the top of the water distributor (11) is a conical structure (115) that is smaller at the top and larger at the bottom. The nested delivery pipe (12) is provided with several layers of delivery channels (121), which correspond one-to-one with and are connected to the cavities (111). Each delivery channel (121) is connected to at least one water supply pipe (13) for delivering water to each cavity (111). Each water supply pipe (13) is distributed in a radiating pattern along the circumference of the nested delivery pipe (12). The end of the water supply pipe (13) away from the nested delivery pipe (12) is connected to a control valve (15) for isolating or connecting the water supply pipe (13) and the water supply equipment. The other end of the water supply pipe (13) is connected to the delivery channel (121) through a connecting pipe (14). The water supply pipe (13) corresponds one-to-one with and is connected to the delivery channel (121). The upper cavity (111) is connected to a water distribution branch pipe (114), and the side wall of the lower cavity (111) is provided with a water outlet hole (113) to form a perforated plate or sieve plate to achieve drainage at different positions and different heights. The discharge structure is a water outlet (113) provided on the side wall of the water distributor (11) or a plurality of water distribution branch pipes (114) provided on the side wall of the water distributor (11), and the side wall of the water distribution branch pipe (114) is provided with a drain hole. Each of the water distribution branch pipes (114) is arranged radially along the water distributor (11), and the drain holes are staggered along the sidewalls of the water distribution branch pipes; Each of the water supply pipes (13) is arranged radially along the water distributor (11), and the water supply pipes (13) are separated from each other by a water baffle (131); The nested delivery pipe (12) includes a central pipe (122) and multiple outer pipes (123) arranged in a radial direction around the central pipe (122) to form multiple delivery channels (121). Each delivery channel (121) corresponds to a cavity (111), and the corresponding delivery channel (121) is connected to the cavity (111) to realize the connection between the delivery channel (121) and the cavity (111). From the axis of the central pipe (122) to the outer periphery of the central pipe (122), the two ends of the central pipe (122) and the multiple outer pipes (123) gradually shorten. The lower ends of the central pipe (122) and the multiple outer pipes (123) are connected to the cavity (111) from bottom to top.

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