A high-temperature purification treatment device for graphite powder, a raw material of a lithium ion battery negative electrode

Abstract

The application discloses a kind of lithium ion battery negative electrode raw material graphite powder high-temperature purification treatment device, belong to graphite powder purification technical field, including purification furnace body, wherein, the top and bottom of purification furnace body are respectively connected with inlet pipe and discharge pipe, the inside of purification furnace body is rotatably connected with rotating pipe one, and the outside of rotating pipe one is wound with hollow spiral conveying blade, the bottom end of rotating pipe one is fixedly connected with conical disc, and inverted conical disc is fixedly connected at the bottom end of conical disc, and built-in groove is equidistantly arranged on the inclined surface of inverted conical disc, and telescopic block is slidably connected in the inside of built-in groove, and telescopic block is connected with the inner end of built-in groove by reset spring, and the inclined surface on the outside of telescopic block is rotatably connected with rolling roller.The application is further improved by the mutual cooperation between telescopic block and rolling roller and the stop bar to crush the graphite powder while hammering the graphite powder, so as to further improve the crushing effect of graphite powder, and the gasification impurities generated by purification overflow.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of graphite powder purification, in particular to a high-temperature purification treatment device for lithium ion battery negative electrode raw material graphite powder. BACKGROUND

[0002] Graphite is a high-energy crystalline carbon material. Graphite has unique structure and electrical conductivity, thermal conductivity, lubricity, high temperature resistance and chemical stability, and has high application value in high-performance materials. It is widely used in metallurgy, machinery, environmental protection, chemical industry, refractory materials, electronics, medicine, military, aerospace and other fields. As a necessary non-metallic material for the development of modern industry and high-tech, it plays an increasingly important role in the development of national economy. The methods of graphite purification mainly include: flotation method, alkali-acid method, hydrofluoric acid method, chlorination roasting method and high temperature method. High temperature purification is physical purification, which uses the property of graphite that it can withstand high temperature. The impurities are volatilized by heating in an electric furnace in an air-tight manner, thereby improving the concentrate grade.

[0003] In the prior art such as the natural graphite negative electrode powder purification treatment device and method shown in the authorized announcement CN114436252B, the crushed graphite powder raw material falls on the circular table turning plate, is collected through the circular table turning plate and the horn mouth, enters between the external fixed cylinder and the internal support cylinder, the cam is rotated under the driving of the stirring shaft, the inner side extrusion plate is extruded, the inner side extrusion plate is extruded, the guide rod is driven to move the outer side extrusion plate to the inner wall of the purification furnace body, the graphite powder raw material is extruded, the cam is moved to the next inner side extrusion plate, the support spring drives the inner side extrusion plate and the outer side extrusion plate to reset, in the process, the cam structure continuously makes the extrusion plate reciprocate, but in the process, when the cam pushes one of the extrusion plates, the graphite powder raw material at the position of the other extrusion plates does not have extrusion force, therefore, the caked graphite powder cannot be crushed, thereby affecting the purification effect of the graphite powder, therefore, the application provides a high-temperature purification treatment device for lithium ion battery negative electrode raw material graphite powder. SUMMARY

[0004] The main purpose of the application is to provide a high-temperature purification treatment device for lithium ion battery negative electrode raw material graphite powder, which can improve the crushing effect of the graphite powder by using the side surface of the stretch block, the rolling pressure roller and the blocking bar to extrude the graphite powder, and can further improve the crushing effect of the graphite powder by suddenly popping out the stretch block and the rolling pressure roller to hammer the graphite powder, so as to facilitate the overflow of the gasification impurities generated in the purification.

[0005] In order to achieve the above object, the application provides a graphite powder high-temperature purification treatment device for lithium ion battery negative electrode raw materials, which comprises a purification furnace body, wherein the top and bottom of the purification furnace body are respectively connected with an inlet pipe and an outlet pipe, a rotating pipe one is rotatably connected in the interior of the purification furnace body, and a hollow spiral conveying blade is wound outside the rotating pipe one, and the interior of the rotating pipe one and the interior of the hollow spiral conveying blade are communicated through a through hole;

[0006] The bottom end of the rotating pipe one is fixedly connected with a conical disc, the bottom end of the conical disc is fixedly connected with an inverted conical disc, a built-in groove is formed on the inclined surface of the inverted conical disc at equal intervals, a telescopic block is slidably connected in the interior of the built-in groove, the telescopic block is connected with the inner end of the built-in groove through a return spring, and a rolling roller is rotatably connected on the inclined surface outside the telescopic block;

[0007] The interior of the purification furnace body outside the conical disc and the inverted conical disc is fixedly connected with a rolling cylinder, and a material guide pipe is fixedly connected at the middle position of the bottom end of the rolling cylinder;

[0008] The interior of the material guide pipe at the bottom end of the inverted conical disc is fixedly connected with a fixed pipe, two groups of plasma torch assemblies are rotatably connected at equal intervals along the axial direction of the bottom end of the fixed pipe, the two groups of plasma torch assemblies are connected through a connecting pipe two, a rotating rod is fixedly connected at the middle position of the bottom of the plasma torch assembly at the bottom end, stirring rods are distributed at equal intervals along the axial direction of the rotating rod, a cross-shaped fixed plate two is fixed in the interior of the fixed pipe and the connecting pipe two, and the cross-shaped fixed plate two and the rotating rod are connected through a fixed rod two.

[0009] Preferably, a driving motor is installed at the top end of the purification furnace body, a driving rod is connected with the output end of the driving motor, a fixed sleeve is fixedly connected with the connection position of the driving rod and the rotating pipe one, bearings one corresponding to the bottom end of the driving rod and the top end of the rotating pipe one are symmetrically installed in the interior of the fixed sleeve, a fixed rod one is fixedly connected with the bottom end of the driving rod, a cross-shaped fixed plate one connected with the end of the fixed rod one is fixed at the top end of the rotating pipe one, and an air inlet pipe is connected with the outside of the fixed sleeve between the driving rod and the rotating pipe one.

[0010] Preferably, a torch head two is installed at equal intervals along the spiral route of the hollow spiral conveying blade.

[0011] Preferably, the plasma torch assembly comprises symmetrically arranged bearings two, the two bearings two are connected through a rotating pipe two, rotating vanes are fixed at equal intervals along the circumferential direction of the inner wall of the rotating pipe two, a torch pipe is connected with the position of the torch pipe opening formed between adjacent two rotating vanes, and a torch head one is installed on the torch pipe.

[0012] Preferably, a stirring barrel connected with the bottom end of the material guide pipe is fixed inside the purification furnace body at the position of the rotating rod, a cooling cavity is formed between the outer wall of the stirring barrel and the inner wall of the purification furnace body, and a water injection pipe is arranged on the purification furnace body and communicates with the cooling cavity.

[0013] Preferably, the upper portion of the purification furnace body is connected with a connecting pipe one which communicates with the purification furnace body.

[0014] Preferably, the inclined surface on the inner side of the rolling cylinder is fixed with blocking strips at equal intervals.

[0015] The application has the advantages that: firstly, the driving rod is driven to rotate by the driving motor, the driving rod and the rotating tube one are fixedly connected by the fixed rod one and the cross-shaped fixed plate one, so that the rotating tube one is driven to rotate, combustible gas is introduced into the rotating tube one through the air inlet pipe, and the hollow spiral conveying blade is driven to rotate in the rotating process of the rotating tube one, so that the graphite powder in the purification furnace body is conveyed, the hollow spiral conveying blade is hollow, the hollow cavity in the hollow spiral conveying blade is communicated with the rotating tube one through the through hole, the combustible gas enters the hollow cavity in the hollow spiral conveying blade, the plasma flame is sprayed by the spray gun head two, so that the graphite powder in the purification furnace body is preheated, the drying degree of the graphite powder is improved, and the effect of impurity removal is improved.

[0016] Secondly, graphite powder is conveyed to the conical disc, and the graphite powder is slid to the inside of the rolling cylinder by the inclined surface of the conical disc, so that the conical disc and the inverted conical disc are rotated under the rotation, and the graphite powder entering the inside of the rolling cylinder is ground in the process of rotation of the inverted conical disc, so as to facilitate the crushing of the agglomerated graphite powder. It is explained that in the process of preheating by the above-mentioned spray gun head two, the water in the graphite powder is removed, so as to prevent the graphite powder after grinding from being mutually adhered in the form of cakes due to the existence of water in the graphite powder in the grinding process. In the process of grinding the graphite powder, the telescopic block and the rolling roller are cooperated with the blocking strip, so that the telescopic block and the rolling roller are extruded by the side surface of the blocking strip in the process of mutual friction between the telescopic block and the rolling roller and the blocking strip, so as to improve the crushing effect of the graphite powder. When the telescopic block and the rolling roller slide along the inside of the built-in groove and make the return spring extruded, the telescopic block and the rolling roller are blocked by the blocking strip and shrink above the blocking strip, and then in the process of rotation, the telescopic block and the rolling roller are suddenly popped out under the action of the return spring when the telescopic block and the rolling roller are separated from the blocking strip, so as to further improve the crushing effect of the graphite powder and facilitate the overflow of the gasification impurities generated by purification.

[0017] Finally, the graphite powder after crushing enters the inside of the guide pipe, and the combustible gas enters the inside of the fixed pipe, the plasma torch assembly and the connecting pipe two at the same time, and the rotating blade is driven to rotate by the driving force of the combustible gas entering, so that the rotating pipe two and the driving motor move in the opposite direction, and the combustible gas is introduced into the inside of the spray gun pipe through the spray gun pipe opening, and is sprayed into the plasma flame through the spray gun head one, so as to further remove the impurities in the crushed graphite powder. The crushed graphite powder is heated by the plasma flame, so as to improve the effect of uniform heating of the graphite powder raw material, prevent the graphite powder raw material from being unevenly heated, and simultaneously rotate the spray gun pipe in the process of rotation of the rotating pipe two, so as to scatter the crushed graphite powder raw material and further improve the uniformity of the heating of the graphite powder raw material. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present application and, together with their description, serve to explain the application. In the drawings:

[0019] Figure 1 is a schematic diagram of the body structure of the purification furnace of the present application.

[0020] Figure 2 is a schematic diagram of the internal structure of the body of the purification furnace of the present application.

[0021] Figure 3is Figure 2 Enlarged structural schematic view of the middle A.

[0022] Figure 4 is the internal component structure schematic view of the purification furnace body of the present application.

[0023] Figure 5 is the internal component cross-sectional structure schematic view of the purification furnace body of the present application.

[0024] Figure 6 is Figure 5 Enlarged structural schematic view of the middle B.

[0025] Figure 7 is the ion plasma spray gun component structure schematic view of the present application.

[0026] Figure 8 is the hollow spiral conveying blade, conical disc and rolling cylinder cross-sectional structure schematic view of the present application.

[0027] Figure 9 is the rolling cylinder cross-sectional structure schematic view of the present application.

[0028] In the above figures, 100, purification furnace body; 101, discharge pipe; 102, water injection pipe; 103, connecting pipe one; 104, inlet pipe; 105, air inlet pipe; 106, cooling cavity; 200, driving motor; 300, driving rod; 301, bearing one; 302, fixed rod one; 303, cross-shaped fixed plate one; 304, fixed sleeve; 400, rotating pipe one; 401, rotating rod; 402, stirring rod; 403, fixed pipe; 404, cross-shaped fixed plate two; 405, fixed rod two; 406, spray gun head one; 407, spray gun pipe; 408, rotating pipe two; 409, connecting pipe two; 410, bearing two; 411, spray gun pipe opening; 412, rotating blade; 500, hollow spiral conveying blade; 501, spray gun head two; 600, conical disc; 601, inverted conical disc; 602, telescopic block; 603, rolling roller; 604, built-in groove; 605, return spring; 700, rolling cylinder; 701, material guide pipe; 702, blocking strip; 800, stirring cylinder. DETAILED DESCRIPTION

[0029] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the present application embodiment will be clearly and completely described below in combination with the drawings in the present application embodiment. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second" and "third" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of these terms is interchangeable under appropriate circumstances such that the embodiments of the present application described herein are, for example, capable of orderly or inverse order. Moreover, the terms "include", "have" and "contain" and their variations, when used in this description and in the claims of the present application, are intended to cover a non-exclusive inclusion such that a process, method, system, product or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units that are explicitly listed, but can include other steps or units that are not expressly listed or inherent to such process, method, system, product or apparatus.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used for better describing the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0033] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be interpreted broadly. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0035] Reference is made to Figures 1-9As shown, the embodiment provides a kind of graphite powder high temperature purification treatment device of lithium ion battery negative electrode raw material, including purification furnace body 100, wherein the top of the purification furnace body 100 is connected with entering pipe 104 and discharge pipe 101 respectively, rotating pipe one 400 is rotatably connected in the inside of the purification furnace body 100, and hollow spiral conveying blade 500 is wound on the outside of rotating pipe one 400, and the inside of rotating pipe one 400 and the inside of hollow spiral conveying blade 500 are connected by through hole and communicated;

[0036] The bottom end of rotating pipe one 400 is fixedly connected with conical disc 600, and inverted conical disc 601 is fixedly connected at the bottom end of conical disc 600, and built-in groove 604 is equidistantly arranged on the inclined surface of inverted conical disc 601, and telescopic block 602 is slidably connected in the inside of built-in groove 604, and telescopic block 602 is connected with the inner end of built-in groove 604 through reset spring 605, and rolling roller 603 is rotatably connected on the inclined surface of the outside of telescopic block 602;

[0037] The inside of the purification furnace body 100 of the outside of conical disc 600 and inverted conical disc 601 is fixedly connected with rolling cylinder 700, and guide pipe 701 is fixedly connected at the middle position of the bottom end of rolling cylinder 700;

[0038] The inside of guide pipe 701 at the bottom end of inverted conical disc 601 is fixedly connected with fixed pipe 403, two groups of plasma torch assemblies are rotatably connected at the bottom end of fixed pipe 403 along its axial direction at equal intervals, the two groups of plasma torch assemblies are connected through connecting pipe two 409, rotating rod 401 is fixedly connected at the middle position of the bottom of the plasma torch assembly at the bottom end, and stirring rod 402 is distributed at equal intervals on the upper of rotating rod 401 along its axial direction, cross-shaped fixed plate two 404 is fixed in the inside of fixed pipe 403 and connecting pipe two 409, and cross-shaped fixed plate two 404 and rotating rod 401 are connected through fixed rod two 405.

[0039] In the embodiment, the top end of the purification furnace body 100 is provided with a driving motor 200, and a driving rod 300 is connected to the output end of the driving motor 200, and a fixed sleeve 304 is fixedly connected to the connection position of the driving rod 300 and the rotating pipe 1 400, and a bearing 1 301 corresponding to the bottom end of the driving rod 300 and the top end of the rotating pipe 1 400 is symmetrically arranged in the fixed sleeve 304, the bottom end of the driving rod 300 is fixedly connected with a fixed rod 1 302, and a cross-shaped fixed plate 1 303 connected with the end of the fixed rod 1 302 is fixedly arranged on the top end of the rotating pipe 1 400, and the outer side of the fixed sleeve 304 between the driving rod 300 and the rotating pipe 1 400 is connected with an air inlet pipe 105, and in use, the driving rod 300 is driven to rotate by the driving motor 200, and the driving rod 300 and the rotating pipe 1 400 are fixedly connected by the fixed rod 1 302 and the cross-shaped fixed plate 1 303, so as to drive the rotating pipe 1 400 to rotate, and at the same time, the combustible gas is introduced into the inside of the rotating pipe 1 400 through the air inlet pipe 105.

[0040] In the embodiment, the hollow spiral conveying blade 500 is provided with a plurality of spray gun heads 2 501 arranged at equal intervals along the spiral route, and in use, the graphite powder entering the inside of the purification furnace body 100 is preheated by the plasma flame sprayed by the spray gun heads 2 501, so as to improve the drying degree of the graphite powder and improve the effect of impurity removal.

[0041] In the embodiment, the plasma torch assembly comprises two symmetrically arranged bearings 2 410, and the two bearings 2 410 are connected by a rotating pipe 2 408, and a rotating blade 412 is fixedly arranged at equal intervals on the inner wall of the rotating pipe 2 408 along the circumferential direction, and a spray gun nozzle 41 1 is arranged on the rotating pipe 2 408 between two adjacent rotating blades 412, and a spray gun tube 407 is connected to the position of the spray gun nozzle 41 1, and a spray gun head 1 406 is arranged on the spray gun tube 407, and in use, the combustible gas enters the inside of the fixed pipe 403, the plasma torch assembly and the connecting pipe 2 409, and the rotating blade 412 is driven to rotate by the driving force of the entering combustible gas, so that the rotating pipe 2 408 and the driving motor 200 move in opposite directions, and at the same time, the combustible gas is introduced into the inside of the spray gun tube 407 through the spray gun nozzle 41 1, and the plasma flame is sprayed through the spray gun head 1 406, and the impurities in the crushed graphite powder are removed again, and the crushed graphite powder is heated by the plasma flame, so as to improve the effect of uniformly heating the graphite powder raw material and prevent the graphite powder raw material from being unevenly heated, and at the same time, the spray gun tube 407 rotates synchronously during the rotation of the rotating pipe 2 408, so as to scatter the crushed graphite powder raw material and further improve the uniformity of the heating of the graphite powder raw material.

[0042] In the embodiment, the stirring drum 800 is fixed in the interior of the purification furnace body 100 at the position of the rotating rod 401, and is connected with the bottom end of the material guide pipe 701. The outer side wall of the stirring drum 800 and the inner side wall of the purification furnace body 100 form a cooling cavity 106, and the water injection pipe 102 is arranged on the purification furnace body 100 and is in communication with the cooling cavity 106. In use, cooling water is injected into the cooling cavity 106 through the water injection pipe 102. Under the double actions of stirring and cooling water, the overflow effect of the gasified impurities is further improved, so that the purification effect is improved.

[0043] In the embodiment, the upper portion of the purification furnace body 100 is connected with the connecting pipe I 103 which is in communication with the purification furnace body 100. In use, the air in the purification furnace body 100 is extracted through the connecting pipe I 103, and then the inert gas is injected into the interior of the purification furnace body 100 through the connecting pipe I 103, so that the normal air pressure in the purification furnace body 100 is restored.

[0044] In the embodiment, the inclined surface of the inside of the rolling cylinder 700 is fixed with the blocking strips 702 at equal intervals. In use, the stretching and contracting block 602 and the rolling roller 603 are matched with the blocking strips 702. Therefore, in the process of rotating the inverted conical disc 601, the stretching and contracting block 602 and the rolling roller 603 are pressed against the graphite powder by the side surface of the stretching and contracting block 602 and the rolling roller 603 and the blocking strips 702 in the process of mutual friction, so that the crushing effect of the graphite powder is improved. When the stretching and contracting block 602 and the rolling roller 603 slide along the interior of the built-in groove 604 and the return spring 605 is pressed, the stretching and contracting block 602 and the rolling roller 603 are blocked by the blocking strips 702 and are contracted above the blocking strips 702. Then, in the process of rotating, the stretching and contracting block 602 and the rolling roller 603 are suddenly ejected under the action of the return spring 605 when the stretching and contracting block 602 and the rolling roller 603 are separated from the blocking strips 702, so that the graphite powder is hammered, and the crushing effect of the graphite powder is further improved, and the overflow of the gasified impurities produced in the purification is facilitated.

[0045] In summary:

[0046] Before the graphite powder is purified, the air in the purification furnace body 100 is extracted through the connecting pipe I 103, and then the inert gas is injected into the interior of the purification furnace body 100 through the connecting pipe I 103, so that the normal air pressure in the purification furnace body 100 is restored. Then, the graphite powder is injected into the interior of the purification furnace body 100 through the inlet pipe 104.

[0047] Subsequently, the driving rod 300 is driven to rotate by the driving motor 200, and the driving rod 300 is fixedly connected with the rotating pipe 400 by the fixed rod 302 and the cross-shaped fixed plate 303, so that the rotating pipe 400 is driven to rotate, and combustible gas is introduced into the rotating pipe 400 through the gas inlet pipe 105. In the rotating process of the rotating pipe 400, the hollow spiral conveying blade 500 is driven to rotate, and the graphite powder in the purification furnace body 100 is conveyed. In the conveying process by the hollow spiral conveying blade 500, the hollow spiral conveying blade 500 is hollow inside, and the rotating pipe 400 is communicated with the hollow cavity inside the hollow spiral conveying blade 500 through the through hole, so that the combustible gas enters the hollow cavity inside the hollow spiral conveying blade 500. Subsequently, the plasma flame is sprayed by the spray gun head 501, so that the graphite powder in the purification furnace body 100 is preheated, thereby improving the drying degree of the graphite powder and the effect of removing impurities;

[0048] Subsequently, the graphite powder is conveyed to the conical disc 600, and the graphite powder is slid to the inside of the rolling cylinder 700 by the inclined surface of the conical disc 600, so that the conical disc 600 and the inverted conical disc 601 are driven to rotate under the rotation of the 400. In the rotating process of the inverted conical disc 601, the graphite powder in the rolling cylinder 700 is ground, so that the agglomerated graphite powder is crushed. It is explained that, in the preheating process by the spray gun head 501, the water in the graphite powder is removed, so that the graphite powder is not agglomerated into a cake after grinding due to the water in the graphite powder. In the grinding process of the graphite powder, the telescopic block 602 and the rolling roller 603 are cooperated with the blocking strip 702, so that the graphite powder is extruded by the side surface of the telescopic block 602 and the rolling roller 603 when the telescopic block 602 and the rolling roller 603 are rubbed with the blocking strip 702 in the rotating process of the inverted conical disc 601, thereby improving the crushing effect of the graphite powder. When the telescopic block 602 and the rolling roller 603 slide along the built-in groove 604 and extrude the return spring 605, the telescopic block 602 and the rolling roller 603 are blocked by the blocking strip 702 and are contracted above the blocking strip 702. Subsequently, in the rotating process, the telescopic block 602 and the rolling roller 603 are suddenly extruded by the return spring 605 when the telescopic block 602 and the rolling roller 603 are separated from the blocking strip 702, so that the graphite powder is hammered, thereby further improving the crushing effect of the graphite powder, and the gasification impurities generated by the purification are easily overflowed;

[0049] Subsequently, the crushed graphite powder enters the inside of the guide pipe 701, while the combustible gas synchronously enters the inside of the fixed pipe 403, the plasma torch assembly, and the connecting pipe two 409, and drives the rotating blade 412 to rotate by the pushing force of the entering combustible gas, so that the rotating pipe two 408 and the driving motor 200 move in opposite directions, while the combustible gas is guided into the inside of the torch pipe 407 through the torch pipe orifice 411, and is sprayed into the plasma flame through the torch head one 406, and the crushed graphite powder is again impurity-removed, and the crushed graphite powder is heated by the plasma flame, so as to improve the effect of uniformly heating the graphite powder raw material, prevent the graphite powder raw material from being unevenly heated, and simultaneously, the torch pipe 407 rotates synchronously in the rotating process of the rotating pipe two 408, so as to scatter the crushed graphite powder raw material, and further improve the uniformity of the graphite powder raw material heated;

[0050] Subsequently, the graphite powder raw material enters the inside of the stirring cylinder 800, and is fixedly connected with the rotating rod 401 through the cross-shaped fixed plate two 404 and the fixed rod two 405, so that the rotating pipe one 400 synchronously drives the rotating rod 401 and the stirring rod 402 to rotate, so as to stir the graphite powder raw material entering the inside of the stirring cylinder 800, so as to accelerate the emission of the hot gas of the heated graphite powder raw material, improve the overflow of the gasified impurities, and then discharge the purified graphite powder raw material through the discharge pipe 101. In the stirring process of the graphite powder raw material, cooling water is synchronously injected into the inside of the cooling cavity 106 through the water injection pipe 102, under the double action of stirring and cooling water, the overflow effect of the gasified impurities is further improved, so as to improve the purification effect.

Claims

1. A high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, comprising a purification furnace body (100), wherein, The top and bottom of the purification furnace body (100) are respectively connected to an inlet pipe (104) and an outlet pipe (101). The purification furnace body (100) is characterized in that a rotating pipe (400) is rotatably connected inside the purification furnace body (100), and a hollow spiral conveying blade (500) is wound around the outside of the rotating pipe (400), and the inside of the rotating pipe (400) and the inside of the hollow spiral conveying blade (500) are connected through a through hole. A conical disc (600) is fixedly connected to the bottom end of the rotating tube (400), and an inverted conical disc (601) is fixedly connected to the bottom end of the conical disc (600). A rolling mill (700) is fixedly connected inside the purification furnace body (100) on the outside of the conical disc (600) and the inverted conical disc (601), and a guide pipe (701) is fixedly connected at the middle position of the bottom end of the rolling mill (700). A fixed tube (403) is fixedly connected inside the feed tube (701) at the bottom end of the inverted conical disk (601). Two sets of plasma spray gun assemblies are rotatably connected at equal intervals along the axial direction at the bottom end of the fixed tube (403). The two sets of plasma spray gun assemblies are connected to each other through a connecting tube (409). A rotating rod (401) is fixedly connected at the middle position of the bottom of the plasma spray gun assembly. A stirring rod (402) is evenly distributed on the upper part of the rotating rod (401) along the axial direction. The plasma The spray gun assembly includes symmetrically arranged bearings (410), and the two bearings (410) are connected by a rotating tube (408). The inner wall of the rotating tube (408) is fixed with rotating blades (412) at equal intervals along its circumference. A spray gun nozzle (411) is opened on the rotating tube (408) between two adjacent rotating blades (412). A spray gun tube (407) is connected to each of the spray gun nozzles (411), and a spray gun head (406) is installed on the spray gun tube (407).

2. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that, A drive motor (200) is installed at the top of the purification furnace body (100), and a drive rod (300) is connected to the output end of the drive motor (200). A fixing sleeve (304) is fixed at the connection between the drive rod (300) and the rotating tube (400). A bearing (301) corresponding to the bottom end of the drive rod (300) and the top end of the rotating tube (400) is symmetrically installed inside the fixing sleeve (304). A fixing rod (302) is fixedly connected to the bottom end of the drive rod (300), and a cross-shaped fixing plate (303) connected to the end of the fixing rod (302) is fixed at the top end of the rotating tube (400). An air inlet pipe (105) is connected to the outside of the fixing sleeve (304) between the drive rod (300) and the rotating tube (400).

3. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that... The hollow spiral conveying blade (500) is equipped with spray gun heads (501) at equal intervals along its spiral path.

4. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that... Inside the purification furnace body (100) at the position of the rotating rod (401), there is a stirring drum (800) connected to the bottom end of the feed pipe (701). A cooling chamber (106) is formed between the outer wall of the stirring drum (800) and the inner wall of the purification furnace body (100). A water injection pipe (102) communicating with the cooling chamber (106) is provided on the purification furnace body (100).

5. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that, The upper part of the purification furnace body (100) is connected to a connecting pipe (103) that communicates with the purification furnace body (100).

6. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that, The inner inclined surface of the rolling cylinder (700) is fixed with baffles (702) at equal intervals.

7. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that, The inverted conical disk (601) has internal grooves (604) spaced at equal intervals on its inclined surface, and telescopic blocks (602) are slidably connected inside each internal groove (604).

8. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 7, is characterized in that... The telescopic block (602) is connected to the inner end of the built-in groove (604) by a return spring (605), and a rolling roller (603) is rotatably connected to the inclined surface on the outer side of the telescopic block (602).

9. The high-temperature purification device for graphite powder, a raw material for lithium-ion batteries, according to claim 1, is characterized in that, The fixed tube (403) and the connecting tube (409) are internally fixed with a cross-shaped fixing plate (404), and the cross-shaped fixing plate (404) and the rotating rod (401) are connected by a fixing rod (405).

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