Graphite crucible for graphitization furnace

Abstract

The utility model belongs to the technical field of graphitization furnaces, particularly relates to a graphite crucible for a graphitization furnace, and provides the following scheme aiming at the problems that impurities falling from the inner wall of the graphitization furnace invade and the purity of negative electrode powder in the crucible is reduced during heating due to the fact that the existing equipment is in an open design, the graphite crucible comprises a crucible body, a sealing structure is arranged at the top of the crucible body, a hinge block is welded to the top of one side of the sealing structure, a tilting plate is installed in the hinge block through a rolling bearing, the top of the tilting plate is welded to one end of the peripheral side of a sealing cover, the sealing cover is clamped to the top of the crucible body, and a plurality of air holes are formed in the top of the sealing cover in a penetrating mode. And a sealing ring is welded on the peripheral side of the bottom end of the sealing cover and positioned in the crucible body. The sealing ring at the bottom of the sealing cover is arranged at the top of the crucible body, so that the purposes of preventing external falling impurities from invading and improving the purity of negative electrode powder in the crucible are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphitization furnaces, in particular to a graphite crucible used in a graphitization furnace. Background Art

[0002] With the development of new energy power, lithium-ion batteries are increasingly favored by investors. As a key component of lithium-ion batteries, the market for carbon negative electrode powder is also facing a blowout development. A key step in the production process of carbon negative electrode powder is to increase the degree of graphitization and purity. Graphitization refers to the transformation of carbon atoms from a disordered and irregular arrangement to a regularly arranged hexagonal planar mesh structure, that is, a graphite microcrystalline structure, at high temperature. The purpose is to obtain graphite's high electrical conductivity, high thermal conductivity, corrosion resistance, and friction resistance. The graphitization temperature can be as high as 3000°C. The higher the temperature, the more perfect the development of the graphite microcrystalline structure, thereby increasing the degree of graphitization; at the same time, at such a high temperature, other atoms with low melting points are discharged in the form of gas, thereby achieving material purification. We call the equipment that completes high graphitization or improved purity a graphitization furnace.

[0003] A patent with publication number CN103673601A disclosed a heterogeneous multilayer crucible, which includes a plurality of crucible layers of different materials, and a sand filling layer is provided between two adjacent crucible layers. The heterogeneous multilayer crucible may also include a first crucible layer, a second crucible layer and a third crucible layer, a sand filling layer I is provided between the first crucible layer (1) and the second crucible layer, and a sand filling layer II is provided between the second crucible layer and the third crucible layer.

[0004] The existing equipment is open-mouthed, which causes impurities that fall off the inner wall of the graphitization furnace to intrude during heating, reducing the purity of the negative electrode powder inside the crucible. Therefore, we propose a graphite crucible for a graphitization furnace to solve the above problem. Utility Model Content

[0005] The utility model aims to solve the disadvantage of impurity invasion and proposes a graphite crucible for a graphitization furnace.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a graphite crucible for a graphitization furnace, comprising a crucible body, the top of which is provided with a sealing structure;

[0007] A hinge block is welded on the top of one side of the sealing structure, a tilting plate is installed inside the hinge block through a rolling bearing, the top of the tilting plate is welded to one end of the peripheral side of the sealing cover, the sealing cover is clamped on the top of the crucible body, a plurality of air holes are opened through the top of the sealing cover, and a sealing ring is welded on the peripheral side of the bottom end of the sealing cover and inside the crucible body;

[0008] Two supporting rings are welded at equal intervals on the outer circumference of the crucible body, and the two supporting rings are provided with notches corresponding to the tilting plates.

[0009] Preferably, the sealing structure further comprises a support rod welded to the top of the sealing cover.

[0010] Preferably, a dust cover is welded on the top of the support rod.

[0011] Preferably, the crucible body is a can body with an opening at the top, and a guide opening is provided on one side of the top of the crucible body.

[0012] Preferably, the crucible body and the sealing structure are both made of graphite.

[0013] In the utility model, a graphite crucible for a graphitization furnace is described:

[0014] 1. The utility model prevents the intrusion of impurities falling from the outside and improves the purity of the negative electrode powder inside the crucible by installing the sealing ring at the bottom of the sealing cover on the top of the crucible body;

[0015] 2. When the crucible body is removed, the utility model uses a clamping component to clamp it between two supporting rings to prevent the crucible body from tilting and falling during displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a graphite crucible used in a graphitization furnace proposed by the utility model;

[0017] Figure 2 This is a schematic structural diagram of the back portion of a graphite crucible used in a graphitization furnace proposed by the utility model;

[0018] Figure 3 This is a structural schematic diagram of part A of a graphite crucible used in a graphitization furnace proposed by the utility model;

[0019] Figure 4 The utility model is a schematic structural diagram of a sealing structure of a graphite crucible used in a graphitization furnace.

[0020] In the figure: 1. crucible body; 2. sealing structure; 201. hinge block; 202. tilting plate; 203. sealing cover; 204. air vent; 205. sealing ring; 206. support rod; 207. dust cover; 3. supporting ring; 4. notch; 5. guide port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 , a graphite crucible for a graphitization furnace, comprising a crucible body 1, a sealing structure 2 being arranged on the top of the crucible body 1;

[0023] A hinge block 201 is welded to the top of one side of the sealing structure 2, a tilting plate 202 is installed inside the hinge block 201 through a rolling bearing, the top of the tilting plate 202 is welded to one end of the peripheral side of the sealing cover 203, the sealing cover 203 is clamped to the top of the crucible body 1, a plurality of air holes 204 are opened through the top of the sealing cover 203, and a sealing ring 205 is welded around the bottom end of the sealing cover 203 and located inside the crucible body 1;

[0024] Two supporting rings 3 are welded at equal intervals on the outer circumference of the crucible body 1 , and the two supporting rings 3 are provided with notches 4 corresponding to the tilting plates 202 .

[0025] In this embodiment, the sealing structure 2 further includes a support rod 206 welded to the top of the sealing cover 203 .

[0026] By adopting the above solution, the support rod 206 is welded on the top of the sealing cover 203 to achieve connection stability and avoid the problem of connection misalignment.

[0027] In this embodiment, a dust cover 207 is welded to the top of the support rod 206 .

[0028] By adopting the above solution, by welding a dust cover 207 on the top of the support rod 206 , external impurities can be prevented from invading through the air vent 204 , and excess internal gas can be discharged through the air vent 204 .

[0029] In this embodiment, the crucible body 1 is a can body with an open top, and a guide opening 5 is provided on one side of the top of the crucible body 1 .

[0030] By adopting the above solution, the crucible body 1 is formed into a can body with an opening at the top, and a guide opening 5 is provided on one side of the top of the crucible body 1 , so that the negative electrode powder can be guided to flow out through the guide opening 5 .

[0031] In this embodiment, the crucible body 1 and the sealing structure 2 are both made of graphite.

[0032] By adopting the above solution, by making both the crucible body 1 and the sealing structure 2 out of graphite, it is ensured that the equipment can withstand a high temperature of 3000 degrees without deformation and melting, thereby effectively improving the service life of the equipment.

[0033] In the utility model, when in use, the material is placed on the crucible body 1, the sealing ring 205 at the bottom of the sealing cover 203 is buckled on the top of the crucible body 1, the two supporting rings 3 are clamped and the crucible body 1 is placed in the graphitization furnace for calcination, and the excess gas is discharged through the air vents 204. After the calcination is completed, the tilting plate 202 is pressed to open the sealing cover 203, and the negative electrode powder is discharged from the guide port 5.

[0034] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A graphite crucible for a graphitization furnace, comprising a crucible body (1), characterized in that: A sealing structure (2) is provided on the top of the crucible body (1); A hinge block (201) is welded to the top of one side of the sealing structure (2); a tilting plate (202) is installed inside the hinge block (201) via a rolling bearing; the top of the tilting plate (202) is welded to one end of the peripheral side of a sealing cover (203); the sealing cover (203) is clamped to the top of the crucible body (1); a plurality of air holes (204) are formed through the top of the sealing cover (203); a sealing ring (205) is welded to the peripheral side of the bottom end of the sealing cover (203) and located inside the crucible body (1); Two supporting rings (3) are welded at equal distances on the outer circumference of the crucible body (1), and the two supporting rings (3) are provided with notches (4) corresponding to the tilting plates (202).

2. A graphite crucible for a graphitization furnace according to claim 1, characterized in that: The sealing structure (2) further comprises a support rod (206) welded to the top of the sealing cover (203).

3. A graphite crucible for a graphitization furnace according to claim 2, characterized in that: A dust cover (207) is welded to the top of the support rod (206).

4. A graphite crucible for a graphitization furnace according to claim 1, characterized in that: The crucible body (1) is a can body with an open top, and a guide opening (5) is provided on one side of the top of the crucible body (1).

5. The graphite crucible for a graphitization furnace according to claim 1, characterized in that: The crucible body (1) and the sealing structure (2) are both made of graphite.

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