Magnetic separator for preparing high-purity graphene and working method thereof

Abstract

The application belongs to the technical field of conveying, and particularly relates to a raw material screening and conveying device for graphene preparation, and more particularly relates to a magnetic separator for high-purity graphene preparation and a working method thereof. The magnetic separator for high-purity graphene preparation comprises a magnetic separation bin and a magnetic separation rotary drum. A side wall of a second discharge port is provided with a flushing part. A control module is used for controlling the working mode of the flushing part. The flushing part with switchable working modes can shield the bottom of the second discharge port during magnetic separation operation, effectively prevent slurry from mixing with magnetic materials, and avoid waste of slurry. During cleaning operation, the second discharge port is completely opened and the flushing hole is closed, the flushing water flow is completely eliminated, and impurities are completely discharged, so that the problems of impurity residue and oxidation and pollution of magnetic materials caused by the blocking of the baffle in the related art are solved, and the purity of the raw material for graphene preparation is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of conveying, and particularly relates to a raw material screening and conveying device for graphene preparation. BACKGROUND

[0002] In the industrialized preparation process of graphene materials, the magnetic separation process is a key link for removing magnetic impurities in raw materials and improving the purity of graphene prepared subsequently.

[0003] In the related art, in order to avoid that the magnetic material carries the slurry into the second discharge port, a baffle is arranged at the bottom of the second discharge port, so that the slurry is shielded without affecting the passage of the magnetic material, and the total amount of the slurry entering the second discharge port is reduced. However, since the baffle shields part of the lower end of the second discharge port, when the magnetic separator is flushed subsequently, the baffle blocks the water flow path, so that the impurities flushed out cannot be completely discharged from the second discharge port, and the accumulated magnetic material (such as magnetite Fe 3 O 4) The magnetism significantly attenuates or even disappears after oxidation, thereby reducing the purity of the subsequent slurry and affecting the purity of the graphene.

[0004] Therefore, how to avoid the reduction of the purity of the raw material caused by the blockage of the baffle to the impurities flushed subsequently is a technical problem to be solved at present.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute the information of the prior art. SUMMARY

[0006] The embodiments of the present disclosure at least provide a magnetic separator for high-purity graphene preparation and a working method thereof.

[0007] In a first aspect, the embodiments of the present disclosure provide a magnetic separator for high-purity graphene preparation, comprising:

[0008] a magnetic separation tank, which is provided with a slurry inlet, a first discharge port and a second discharge port;

[0009] a magnetic separation drum, which is rotationally arranged in the magnetic separation tank and is used to separate the magnetic material in the slurry and then send the magnetic material into the second discharge port;

[0010] a side wall of the second discharge port is provided with a flushing member;

[0011] a control module, which is used to control the working mode of the flushing member;

[0012] When the flushing member is in the first working mode, the pulp is subjected to magnetic separation, the flushing member blocks the bottom of the second discharge port, and opens the flushing hole, and the magnetic material discharged from the second discharge port is humidified;

[0013] When the flushing member is in the second working mode, the magnetic separation tank is cleaned, the flushing member completely opens the second discharge port, and closes the flushing hole, and the control module controls the external water source to flush the magnetic separation tank.

[0014] In an alternative embodiment, the flushing member comprises:

[0015] A flushing pipe is fixedly arranged on the second discharge port of the magnetic separation tank, and an outer wall of the flushing pipe is circumferentially provided with an arc-shaped sliding groove;

[0016] A rotating plate comprises an arc-shaped cover plate and an inclined baffle plate;

[0017] The arc-shaped cover plate is attached to the outer wall of the flushing pipe, and the arc-shaped cover plate is provided with a sliding block at a position adapted to the arc-shaped sliding groove, and the arc-shaped cover plate and the flushing pipe are slidingly connected through the sliding block and the arc-shaped sliding groove;

[0018] A push air cylinder is electrically connected to the control module, and is used to control the arc-shaped cover plate to rotate along the arc-shaped sliding groove under the control of the control module, so as to drive the rotating plate to approach the first discharge port and enter the first working mode, or drive the rotating plate to move away from the first discharge port and close the flushing hole of the flushing pipe through the arc-shaped cover plate, and enter the second working mode.

[0019] In an alternative embodiment, the flushing pipe is provided with a gas inlet and a liquid inlet at two ends respectively;

[0020] The flushing pipe is further provided with an extrusion plate;

[0021] In the first working mode, the control module is further configured to control the pressure of the gas introduced by the external gas source through the gas inlet to reciprocate between V 1 and V 2, and the pressure of the liquid introduced by the external water source through the liquid inlet is constant V ;

[0022] Wherein, V the driving force of the gas pressure of f 1 on the extrusion plate is 1;

[0023] V the driving force of the gas pressure of f 2 on the extrusion plate is 2;

[0024] VThe driving force of the liquid pressure to the extrusion plate is f ;

[0025] and, f 1 < x < 2 f < x < 2 f 2, to drive the extrusion plate to reciprocate along the axial direction of the flushing pipe, to intermittently increase the pressure of the flushing hole, to increase the flushing range of the flushing hole.

[0026] In an alternative embodiment, the flushing member further comprises:

[0027] an arc-shaped scraper;

[0028] one end of the arc-shaped scraper is slidingly connected to the discharge plate of the second discharge port, and the other end is arranged towards the flushing pipe and abuts against the outer wall of the flushing pipe;

[0029] the arc-shaped scraper is made of ferromagnetic material, and a strong magnet is arranged in the extrusion plate;

[0030] In the second working mode, after the cleaning of the magnetic separation tank is completed, the control module is further configured to intermittently control the external gas source to pass gas through the gas supply port;

[0031] When the gas supply port passes gas, the pressure of the gas drives the extrusion plate to move along the flushing pipe towards the liquid supply port, extruding the liquid in the flushing pipe; when the gas supply port stops passing gas, the extrusion plate is driven to retreat under the pushing of the liquid, thereby driving the arc-shaped scraper to move along the flushing pipe to remove the impurities on the outer wall of the flushing pipe.

[0032] In an alternative embodiment, the flushing pipe is provided with a chip removal hole at one end close to the liquid supply port;

[0033] a cover plate is arranged on the chip removal hole,

[0034] When the extrusion plate reciprocates along the axial direction of the flushing pipe, the scale is accumulated in the chip removal hole, so as to facilitate the cleaning of the scale in the flushing pipe.

[0035] In an alternative embodiment, the flushing angle of the flushing hole is α ;

[0036] and, the range of the α is 30-80°.

[0037] In an alternative embodiment, the magnetic separation tank comprises:

[0038] a feed tank, and the slurry inlet is arranged in the feed tank;

[0039] a feeding tank connected with the discharge port of the feed tank;

[0040] The magnetic separation drum is arranged on the top surface of the feeding box, and the first discharge port and the second discharge port are arranged at two ends of the top surface of the feeding box, respectively.

[0041] The magnetic separation drum rotates from the first discharge port to the second discharge port along the top surface of the feeding box to separate the magnetic substances in the slurry and then send the slurry into the second discharge port.

[0042] In an optional embodiment, the magnetic separation box further comprises:

[0043] a first discharge box arranged below the first discharge port, and a discharge port of the first discharge box communicating with the outside through the bottom of the feeding box;

[0044] a second discharge box arranged below the second discharge port, and the flushing member arranged in the second discharge box.

[0045] In an optional embodiment, the magnetic separation drum comprises:

[0046] a drum body;

[0047] a magnetic attraction member arranged in the drum body and abutting against the inner wall of the drum body;

[0048] The magnetic attraction member is arranged between the first discharge port and the second discharge port.

[0049] a rotating motor for rotating the drum body under the control of the control module to rotate the magnetic attraction member to complete the adsorption of the slurry.

[0050] In a second aspect, the embodiments of the present disclosure further provide a working method applied to the magnetic separator for preparing high-purity graphene as described above, and the working method comprises:

[0051] the control module controls the flushing member to enter the first working mode;

[0052] the control module controls the magnetic separation drum to rotate;

[0053] the slurry is sent into the slurry inlet of the magnetic separation box through an external conveying mechanism to start the separation of the slurry;

[0054] after the separation is completed, the control module controls the flushing member to enter the second working mode;

[0055] the control module controls the external water source to flush the magnetic separation box.

[0056] The magnetic separator for preparing high-purity graphene and the working method thereof have the beneficial effects that the flushing part with switchable working modes can shield the bottom of the second discharge port during the magnetic separation operation, effectively prevent the slurry from mixing with the magnetic material, and avoid waste of the slurry; during the cleaning operation, the second discharge port is completely opened and the flushing hole is closed, so that the flushing water flow is completely eliminated, and the impurities are completely discharged, thereby solving the problems of impurity residue and oxidation pollution of the magnetic material caused by the blocking of the baffle in the related art, and improving the purity of the raw material for preparing graphene.

[0057] Other features and advantages of the present application will be set forth in the descriptions below, and in part will become apparent to those skilled in the art from the descriptions below, or can be learned by practice of the present application. The purposes and other advantages of the present application can be realized and obtained by the structure particularly pointed out in the descriptions and the drawings.

[0058] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0060] Figure 1 The structural schematic diagram of the magnetic separator for preparing high-purity graphene provided by the embodiment of the present disclosure is shown in the figure;

[0061] Figure 2 The sectional view of the magnetic separator for preparing high-purity graphene provided by the embodiment of the present disclosure is shown in the figure;

[0062] Figure 3 The sectional view of the flushing pipe provided by the embodiment of the present disclosure is shown in the figure; Figure 2 The flushing part is in the first working mode, A The enlarged view of the part;

[0063] Figure 4 The flushing part is in the second working mode, Figure 2 The enlarged view of the part; A

[0064] The sectional view of the flushing pipe provided by the embodiment of the present disclosure is shown in the figure; Figure 5

[0065] The structural schematic diagram of the flushing pipe provided by the embodiment of the present disclosure is shown in the figure; Figure 6

[0066] Figure 7 ​The electric control principle diagram of the magnetic separator for preparing high-purity graphene provided by the embodiment of the present disclosure is provided;

[0067] Figure 8 The flow chart of the working method of the magnetic separator for preparing high-purity graphene provided by the embodiment of the present disclosure is provided.

[0068] In the figure: 100, magnetic separation material box; 110, slurry inlet; 120, first discharge port; 130, second discharge port; 131, discharge plate; 140, feeding box; 150, feeding box; 160, first discharge box; 170, second discharge box; 200, magnetic separation drum; 210, drum body; 220, magnetic attraction accessory; 230, rotating motor; 300, flushing part; 310, flushing hole; 320, flushing pipe; 321, arc-shaped chute; 322, chip removal hole; 323, cover plate; 330, rotating plate; 331, arc-shaped cover plate; 3311, sliding block; 332, inclined baffle; 340, pushing air cylinder; 350, air supply port; 360, liquid supply port; 370, extrusion plate; 380, arc-shaped scraper. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0070] In this document, when a first component is referred to as being "on" a second component, it can be directly formed on the second component, or a third component can be interposed between the first component and the second component. Also, in the drawings, the thickness of components can be exaggerated or reduced for effective description of the technical content.

[0071] In this document, when an element or layer is referred to as being "on", "joined to", "connected to", "attached to", or "coupled to" another element or layer, it can be directly on, joined, connected, attached, or coupled to the other element or layer, or one or more intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly joined to", "directly connected to", "directly attached to", or "directly coupled to" another element or layer, then there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between", "adjacent" versus "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0072] In this document, example embodiments of the disclosure will be described in greater detail. As used herein, expressions such as "at least one of," when preceding the term "comprising," "including," "containing," "having" or "characterized by," specifies the inclusion of at least one of a listing of elements that are presented after the phrase. For example, the phrase "at least one of a, b, and c" should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c. a , b and c at least one of a, b, and c" should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c. a b c , a b a c b c a , b c

[0073] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular articles "a," "an," and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0074] As used herein, the phrases "in an embodiment," "according to an embodiment," "in some embodiments," and the like generally mean the particular feature, structure, or characteristic following the phrase is included in at least one embodiment of the present disclosure. Thus, appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. As used herein, the term "example" or "exemplary" means "serving as an example, instance, or illustration." Any implementation, aspect or design that is described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects or designs. Rather, the term "example" or "exemplary" is used as representative of example implementations described herein, and is not intended to be limiting in any way.

[0075] It is found through research that in the related art, in order to avoid the magnetic material from bringing the slurry into the second discharge port, a baffle is arranged at the bottom of the second discharge port, so that when the magnetic separator is subsequently flushed, the baffle blocks the water flow path, causing the impurities flushed out to be unable to completely discharge from the second discharge port, and the accumulated magnetic materials (such as magnetite​​​​​​​​​​Fe 3 O 4) After oxidation, the magnetic property significantly attenuates or even disappears, resulting in the purity of the subsequent slurry being reduced, which further affects the purity of graphene.

[0076] Based on the above research, the disclosure embodiment provides a magnetic separator for high-purity graphene preparation and a working method thereof. Through the design of the flush part 300 with switchable working modes, the bottom of the second discharge port 130 is shielded during the magnetic separation operation, effectively preventing the mixing of slurry into magnetic materials and avoiding the waste of slurry; during the cleaning operation, the second discharge port 130 is completely opened and the flush hole 310 is closed, completely eliminating the flush water flow obstruction and ensuring that the impurities are completely discharged.

[0077] The above-mentioned defects are the result of the inventors' careful research and practice, so the discovery process of the above-mentioned problems and the solutions proposed by the disclosure in this paper should be the contribution of the inventors to the disclosure.

[0078] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0079] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0080] Please refer to Figure 1 and Figure 2 At least one embodiment provides a magnetic separator for high-purity graphene preparation, comprising: a magnetic separation tank 100 provided with a slurry inlet 110, a first discharge port 120 and a second discharge port 130; a magnetic separation drum 200 is rotatably arranged in the magnetic separation tank 100, and is used to separate the magnetic material in the slurry and send it into the second discharge port 130; the side wall of the second discharge port 130 is provided with a flush part 300.

[0081] Please refer to Figure 7 a control module for controlling the working mode of the flush part 300; and, the flush part 300 is in a first working mode for magnetic separation of the slurry, the flush part 300 shields the bottom of the second discharge port 130 and opens the flush hole 310, and the magnetic material discharged from the second discharge port 130 is humidified; the flush part 300 is in a second working mode for cleaning the magnetic separation tank 100, the flush part 300 completely opens the second discharge port 130 and closes the flush hole 310, and the control module controls the external water source to flush the magnetic separation tank 100.

[0082] Figure 2 In, F For the feeding direction, F 1 is the direction of the screened slurry entering the first discharge port 120, F 2 is the direction of the magnetic material entering the second discharge port 130.

[0083] Through the flush piece 300 with switchable working modes, the bottom of the second discharge port 130 is shielded during magnetic separation operation, effectively preventing the slurry from mixing with the magnetic material and avoiding waste of the slurry; during cleaning operation, the second discharge port 130 is completely opened and the flush hole 310 is closed, completely eliminating the flush water flow obstruction and ensuring that impurities are completely discharged, thereby solving the problems of impurity residue and oxidation pollution of magnetic materials caused by the obstruction of the baffle in the related art, and further improving the purity of the raw material for graphene preparation.

[0084] Please refer to Figure 2 and Figure 3 , the flush piece 300 includes: a flush pipe 320 fixedly arranged on the second discharge port 130 of the magnetic separation tank 100, and an outer wall of the flush pipe 320 is provided with an arc-shaped sliding groove 321 in the circumferential direction; a rotating plate 330 including an arc-shaped cover plate 331 and an inclined baffle 332; the arc-shaped cover plate 331 is attached to the outer wall of the flush pipe 320, and the arc-shaped cover plate 331 is provided with a sliding block 3311 at the matching position with the arc-shaped sliding groove 321, and the arc-shaped cover plate 331 and the flush pipe 320 are connected by the sliding block 3311 and the arc-shaped sliding groove 321; a push cylinder 340 electrically connected with the control module, and used for controlling the arc-shaped cover plate 331 to rotate along the arc-shaped sliding groove 321 under the control of the control module, so as to drive the rotating plate 330 to approach the first discharge port 120, enter the first working mode, as shown in Figure 3 ; or, drive the rotating plate 330 to move away from the first discharge port 120, and close the flush hole 310 of the flush pipe 320 through the arc-shaped cover plate 331, enter the second working mode, as shown in Figure 4 .

[0085] The rotating plate 330 is connected with the arc-shaped sliding groove 321 through the sliding block 3311, which ensures smooth switching between the first working mode (shielding the bottom of the second discharge port 130) and the second working mode (completely opening the second discharge port 130), eliminates the hidden danger of the baffle obstructing the flush path in the related art, makes the impurity flushing more thorough, and reduces the oxidation residue of the magnetic material.

[0086] Please refer to Figure 5 and Figure 6The flushing pipe 320 is provided with an air supply port 350 and a liquid supply port 360 at its two ends, respectively; a squeezing plate 370 is also provided inside the flushing pipe 320; in the first working mode, the control module is also configured to control the pressure of the gas supplied by the external air source through the air supply port 350. V 1 and V The pressure of the liquid supplied from the external water source through the supply port 360 is kept constant by the alternating changes between 2 and 3. V ;in, V The driving force of the gas pressure of 1 on the extrusion plate 370 is f 1; V The driving force of the gas pressure at 2 on the extrusion plate 370 is f 2; V The driving force of the liquid pressure on the extrusion plate is f ;and, f 1 < f < f 2, so as to drive the extrusion plate to reciprocate along the axial direction of the flushing pipe 320 (along... Figure 5 middle F (as shown in 3), to intermittently increase the pressure of the flushing hole 310 to increase the flushing range of the flushing hole 310.

[0087] pass f 1 < f < f The driving force design of 2, the reciprocating motion of the extrusion plate 370 intermittently increases the pressure of the flushing hole 310, expands the flushing coverage, and accelerates the discharge of magnetic materials from the second discharge port 130.

[0088] Please continue reading. Figure 3 and Figure 5 The rinsing component 300 further includes: an arc-shaped scraper 380; one end of the arc-shaped scraper 380 is slidably connected to the discharge plate 131 of the second discharge port 130, and the other end faces the rinsing pipe 320 and is fitted against the outer wall of the rinsing pipe 320; the arc-shaped scraper 380 is made of ferromagnetic material, and a strong magnet is provided inside the extrusion plate; in the second working mode, after cleaning the magnetic separator 100, the control module is also configured to: intermittently control the external air source to introduce gas through the air supply port 350; when gas is introduced through the air supply port, the pressure of the gas drives the extrusion plate to move along the rinsing pipe 320 toward the liquid supply port 360, extruding the liquid in the rinsing pipe 320; when the gas supply port stops introducing gas, the extrusion plate retracts under the push of the liquid, thereby driving the arc-shaped scraper 380 to move along the rinsing pipe 320 to remove debris from the outer wall of the rinsing pipe 320.

[0089] After cleaning in the second working mode, the arc-shaped scraper 380 reciprocates under the magnetic traction of the extrusion plate, scraping away magnetic impurities and deposits (such as iron oxide particles) on the outer wall of the flushing pipe 320, thereby preventing impurities from accumulating between the rotating plate 330 and the discharge plate 131, thus ensuring that the rotating plate 330 returns to its initial position under the push of the push cylinder 340 next time.

[0090] Please see Figure 5 and Figure 6 The flushing pipe 320 is provided with a chip removal hole 322 at one end near the liquid supply port 360; a cover plate 323 is provided on the chip removal hole 322. When the extrusion plate reciprocates along the axial direction of the flushing pipe 320, scale is accumulated in the chip removal hole 322 to facilitate the cleaning of scale in the flushing pipe 320.

[0091] As the extrusion plate reciprocates along the axial direction of the flushing pipe 320, scale is concentrated in the chip discharge hole 322, facilitating periodic cleaning and preventing scale buildup from clogging the flushing hole 310. This ensures consistent flushing efficiency.

[0092] Please see Figure 3 The flushing angle of the flushing hole 310 is α Furthermore, the aforementioned α The range is 30-80°.

[0093] Please see Figure 2 The magnetic separator 100 includes: a feed box 140, with the slurry inlet 110 disposed inside the feed box 140; a feeding box 150 connected to the outlet of the feed box 140; a magnetic separator drum 200 disposed on the top surface of the feeding box 150, with the first outlet 120 and the second outlet 130 respectively disposed at both ends of the top surface of the feed box 140; and the magnetic separator drum 200 rotates along the top surface of the feeding box 150, from the first outlet 120 toward the second outlet 130, so as to screen the magnetic material in the slurry and feed it into the second outlet 130.

[0094] Feed hopper 140 centrally inputs slurry, feed hopper 150 provides directional conveying, combined with the rotation direction of the drum (e.g.) Figure 2 middle F As shown in Figure 5, the adsorption path of magnetic materials was optimized, reducing the probability of slurry mixing into the second discharge port 130, and indirectly improving the purity of the raw materials.

[0095] Please continue reading. Figure 2The magnetic separation tank 100 further comprises a first discharge tank 160 arranged below the first discharge port 120, and a discharge port of the first discharge tank 160 communicates with the outside through the bottom of the feeding tank 150; and a second discharge tank 170 arranged below the second discharge port 130, and the flushing member 300 is arranged in the second discharge tank 170.

[0096] The first discharge tank 160 is dedicated to non-magnetic slurry output, and the second discharge tank 170 is dedicated to processing magnetic materials and flushing, thereby avoiding cross contamination.

[0097] Referring to Figure 1 and Figure 2 The magnetic separation drum 200 comprises a drum body 210, a magnetic adsorption member 220 arranged in the drum body 210 and abutting against an inner wall of the drum body 210, the magnetic adsorption member 220 is arranged between the first discharge port 120 and the second discharge port 130, and a rotating motor 230 for rotating the drum body 210 under the control of the control module to rotate the magnetic adsorption member 220 to complete the adsorption of the slurry.

[0098] The magnetic adsorption member 220 directly abuts against the inner wall of the drum body 210, and the magnetic adsorption member 220 is arranged between the first discharge port 120 and the second discharge port 130, thereby maximizing the adsorption force of the magnetic adsorption member 220, improving the screening efficiency, and further improving the purity of the graphene raw material.

[0099] Referring to Figure 8 The disclosure further provides a working method of the magnetic separator for preparing high-purity graphene, the flushing member 300 is designed to be switchable, the bottom of the second discharge port 130 is shielded during the magnetic separation operation, the slurry is effectively prevented from mixing with the magnetic materials, and the waste of the slurry is avoided; the second discharge port 130 is completely opened and the flushing hole 310 is closed during the cleaning operation, the flushing water flow is completely eliminated, and the impurities are completely discharged, thereby solving the problems of impurity residue and magnetic material oxidation and pollution caused by the baffle obstruction in the related art, and further improving the purity of the graphene preparation raw material.

[0100] Specifically, the working method comprises:

[0101] S 110, the control module controls the flushing member 300 to enter the first working mode;

[0102] S 120, the control module controls the magnetic separation drum 200 to rotate;

[0103] S130, the pulp is sent into the pulp inlet 110 of the magnetic separation tank 100 by an external conveying mechanism, and the pulp is started to be screened;

[0104] S 140, after the screening is completed, the control module controls the flushing member 300 to enter the second working mode;

[0105] S 150, the control module controls the external water source to flush the magnetic separation tank 100.

[0106] In summary, the application provides a magnetic separator for high-purity graphene preparation and a working method thereof, wherein the magnetic separator for high-purity graphene preparation comprises a magnetic separation tank provided with a pulp inlet, a first discharge port and a second discharge port; a magnetic separation drum is rotatably arranged in the magnetic separation tank and is used to screen magnetic substances in the pulp and send the magnetic substances into the second discharge port; a side wall of the second discharge port is provided with a flushing member; a control module is used to control the working mode of the flushing member; when the flushing member is in the first working mode, the pulp is subjected to magnetic separation, the flushing member blocks the bottom of the second discharge port and opens the flushing hole to humidify the magnetic material discharged from the second discharge port; when the flushing member is in the second working mode, the magnetic separation tank is cleaned, the flushing member completely opens the second discharge port and closes the flushing hole, and the control module controls the external water source to flush the magnetic separation tank. Through the flushing member with switchable working modes, the bottom of the second discharge port is blocked during the magnetic separation operation, which effectively prevents the pulp from mixing with the magnetic material and avoids waste of the pulp; during the cleaning operation, the second discharge port is completely opened and the flushing hole is closed, which completely eliminates the obstruction of the flushing water flow and ensures that the impurities are completely discharged, thereby solving the problems of impurity residue and oxidation and pollution of the magnetic material caused by the obstruction of the baffle in the related art, and further improving the purity of the raw material for graphene preparation.

[0107] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0108] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are intended to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used herein and do not imply order or sequence unless expressly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0109] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "above", "upper", and the like, can be used herein to facilitate the description of the relationship of one element or feature to another element or feature as illustrated in the drawings. In addition to the orientation depicted in the drawings, the spatially relative terms can be intended to encompass different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as "below" or "under" the other element or feature will be oriented "above" the other element or feature. Therefore, the example term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0110] In the above discussion, unless otherwise stated, the terms "about", "approximately", "substantially" and the like, when used in describing a numerical value, mean a variation of + / - 10% of the value.

[0111] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can certainly make various changes and modifications within the scope of not deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A magnetic separator for preparing high-purity graphene, characterized in that, The application relates to a magnetic separation machine. The application comprises: a magnetic separation tank (100) provided with a slurry inlet (110), a first discharge outlet (120) and a second discharge outlet (130); a magnetic separation drum (200) rotatably arranged in the magnetic separation tank (100) and used for screening magnetic substances in slurry and feeding the magnetic substances into the second discharge outlet (130); a side wall of the second discharge outlet (130) is provided with a flushing element (300); a control module configured to execute a working mode of the flushing element (300); when the flushing element (300) is in a first working mode, the flushing element (300) blocks the bottom of the second discharge outlet (130) and opens flushing holes (310) to humidify the magnetic materials discharged from the second discharge outlet (130); when the flushing element (300) is in a second working mode, the flushing element (300) completely opens the second discharge outlet (130) and closes the flushing holes (310), and the control module controls an external water source to flush the magnetic separation tank (100); the flushing element (300) comprises: a flushing pipe (320) fixedly arranged on the second discharge outlet (130) of the magnetic separation tank (100), and an outer wall of the flushing pipe (320) is provided with an arc-shaped sliding groove (321) in a circumferential direction; a rotating plate (330) comprising an arc-shaped cover plate (331) and an inclined baffle (332); the arc-shaped cover plate (331) is attached to the outer wall of the flushing pipe (320), and the arc-shaped cover plate (331) is provided with a sliding block (3311) at a position matched with the arc-shaped sliding groove (321); the arc-shaped cover plate (331) is slidably connected to the arc-shaped sliding groove (321) through the sliding block (3311); a push air cylinder (340) electrically connected to the control module and used for controlling the arc-shaped cover plate (331) to rotate along the arc-shaped sliding groove (321) under the control of the control module, so that the rotating plate (330) is driven to approach the first discharge outlet (120) to enter the first working mode; or the rotating plate (330) is driven to move away from the first discharge outlet (120) and the flushing holes (310) of the flushing pipe (320) are closed through the arc-shaped cover plate (331) to enter the second working mode; gas inlets (350) and liquid inlets (360) are arranged at two ends of the flushing pipe (320) respectively; In the first working mode, the control module is further configured to control the pressure of the gas introduced by the external gas source through the gas supply port (350) to reciprocate between V 1 and V 2, and control the pressure of the liquid introduced by the external water source through the liquid supply port (360) to be constant at V . wherein, V 1 the gas pressure of the drive force of the extruded plate is f 1; V 2 the gas pressure of 2 is the driving force of the extruded plate f 2; V The driving force of the liquid pressure of the liquid pressure against the extrusion plate is f ; and, f 1 f < f 2. driving the pressing plate to reciprocate along the axial direction of the flushing pipe (320) to intermittently increase the pressure of the flushing hole (310) to increase the flushing range of the flushing hole (310). the flushing pipe (320) is further provided with an extrusion plate (370); 2. The magnetic separation machine for preparing high-purity graphene according to claim 1, wherein the flushing element (300) further comprises: an arc-shaped scraper (380); one end of the arc-shaped scraper (380) is slidably connected to a discharge plate (131) of the second discharge outlet (130), and the other end of the arc-shaped scraper (380) faces the flushing pipe (320) and is attached to the outer wall of the flushing pipe (320); the arc-shaped scraper (380) is made of ferromagnetic material, and a strong magnet is arranged in the extrusion plate. In the second working mode, after the cleaning of the magnetic separation tank (100) is completed, the control module is further configured to intermittently control the external gas source to supply gas through the gas supply port (350); When the gas supply port supplies gas, the pressure of the gas drives the extrusion plate to move along the flushing pipe (320) towards the liquid supply port (360), extruding the liquid in the flushing pipe (320); when the gas supply port stops supplying gas, the extrusion plate is pushed back by the liquid, thereby driving the arc-shaped scraper (380) to move along the flushing pipe (320) to remove the impurities on the outer wall of the flushing pipe (320).

3. The magnetic separator for preparing high-purity graphene according to claim 2, wherein, One end of the flushing pipe (320) near the liquid supply port (360) is provided with a chip removal hole (322); The chip removal hole (322) is provided with a cover plate (323), When the extrusion plate reciprocates along the axis of the flushing pipe (320), the scale is accumulated in the chip removal hole (322) to facilitate the cleaning of the scale in the flushing pipe (320).

4. The magnetic separator for preparing high-purity graphene according to claim 1, wherein, The flushing angle of the flushing hole (310) is α ; and the α ranging from 30 to 80°.

5. The magnetic separator for preparing high-purity graphene according to claim 1, wherein, The magnetic separation tank (100) comprises: a feed tank (140), wherein the slurry inlet (110) is arranged in the feed tank (140); a feeding tank (150) connected to the discharge port of the feed tank (140); the magnetic separation drum (200) is arranged on the top surface of the feeding tank (150), and the first discharge port (120) and the second discharge port (130) are arranged at the two ends of the top surface of the feed tank (140), respectively; and the rotation direction of the magnetic separation drum (200) is to rotate along the top surface of the feeding tank (150) from the first discharge port (120) to the second discharge port (130) to separate the magnetic substances in the slurry and send them into the second discharge port (130).

6. The magnetic separator for preparing high-purity graphene according to claim 5, wherein, The magnetic separation tank (100) further comprises: a first discharge tank (160) arranged below the first discharge port (120), and the discharge port of the first discharge tank (160) penetrates through the bottom of the feeding tank (150) and communicates with the outside; a second discharge tank (170) arranged below the second discharge port (130), and the flushing member (300) is arranged in the second discharge tank (170).

7. The magnetic separator for preparing high-purity graphene according to claim 1, wherein, The magnetic separation drum (200) comprises: a drum body (210); a magnetic attraction member (220) arranged in the drum body (210) and abutting against the inner wall of the drum body (210); the magnetic attraction member (220) is arranged between the first discharge port (120) and the second discharge port (130); A rotating motor (230) is arranged to rotate the drum body (210) under the control of the control module, so as to rotate the magnetic adsorption member (220) and complete the adsorption of the slurry.

8. A method of operating a magnetic separator for the production of high purity graphene as claimed in claim 1, characterized in that, The working method comprises: The control module controls the flushing member (300) to enter a first working mode; The control module controls the magnetic separation drum (200) to rotate; The slurry is sent into the slurry inlet (110) of the magnetic separation tank (100) through an external conveying mechanism, and the screening of the slurry is started; After the screening is completed, the control module controls the flushing member (300) to enter a second working mode; The control module controls the external water source to flush the magnetic separation tank (100).

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