CN222514237U

CN222514237U - Graphitizing furnace

Info

Publication number: CN222514237U
Application number: CN202420971180.7U
Authority: CN
Inventors: 陈松; 王原; 胡建军; 周剑; 张仁强
Original assignee: Dali Chenyu Energy Storage New Material Co ltd; Hunan Chenyu Fuji New Energy Technology Co ltd
Current assignee: Dali Chenyu Energy Storage New Material Co ltd; Hunan Chenyu Fuji New Energy Technology Co ltd
Priority date: 2024-05-07
Filing date: 2024-05-07
Publication date: 2025-02-21
Anticipated expiration: 2034-05-07

Abstract

The utility model provides a graphitization furnace, and relates to the technical field of graphitization. The graphitizing furnace comprises a furnace body, a heating resistor layer, an induction coil and a heating electrode pair, wherein the furnace body is provided with a material chamber, the heating resistor layer is arranged on the inner side wall of the furnace body along the circumferential direction of the furnace body, the induction coil is arranged around the furnace body, and the heating electrode pair is arranged on the inner periphery of the heating resistor layer. When the graphitizing furnace is operated, the graphitized material is accommodated in the material chamber. The induction coil is electrified to enable the heating resistor layer to generate heat in an induction way, and the graphitized material is heated. Meanwhile, the heating electrode pair arranged at the inner periphery of the heating resistor layer is electrified, so that the graphitized material passing through the heating electrode pair generates current, and the electric energy is continuously converted into internal energy, so that the temperature of the graphitized material per se is increased. The graphitizing furnace adopts an electromagnetic induction heating mode and an electric heating mode to heat the material to be graphitized, so that the material to be graphitized is heated uniformly, and the uniformity of the performance of the product obtained through graphitizing is higher.

Description

Graphitizing furnace

Technical Field

The utility model relates to the technical field of graphitization, in particular to a graphitization furnace.

Background

Graphitization refers to the process of converting a carbon product of other crystal structure into a graphite crystal structure. In general, graphitization is a high-temperature heat treatment process in which a carbon product is heated to 2300 ℃ or higher in a high-temperature electric furnace, so that the amorphous disordered-structure carbon is converted into a three-dimensional ordered graphite crystal structure.

The graphitized carbon material obtained through graphitization treatment has wide application prospects in the fields of iron and steel smelting, lithium ion batteries, nuclear industry and the like. Taking lithium ion batteries as an example, graphitization can improve the volume density, the electrical conductivity, the thermal conductivity, the corrosion resistance and the machining performance of the product, and is a key procedure in the production process of the artificial graphite cathode.

However, the heating mode of the existing graphitizing equipment is single, the condition that materials are heated unevenly is easy to occur, and the performance uniformity of products is affected.

Disclosure of utility model

In order to solve the problems existing in the prior art, the utility model aims to provide a graphitization furnace.

The utility model provides the following technical scheme:

a graphitization furnace comprising:

The furnace body is provided with a material chamber;

The heating resistor layer is arranged on the inner side wall of the furnace body along the circumferential direction of the furnace body;

an induction coil disposed around the furnace body, and

And the heating electrode pair is arranged on the inner periphery of the heating resistor layer.

As a further alternative to the graphitizing furnace, the graphitizing furnace further comprises a feeding device, the feeding device comprising a feed pipe and a first screw conveyor;

One end of the feeding pipe is connected with the top end of the furnace body, the pipe cavity of the feeding pipe is communicated with the material chamber, and the first spiral conveying mechanism is arranged in the feeding pipe.

As a further alternative to the graphitizing furnace, the feeding device further comprises a feeding hopper, and the feeding hopper is connected with one end of the feeding pipe far away from the furnace body.

As a further alternative scheme for the graphitizing furnace, the side wall of the feeding pipe is connected with a protection air pipe for injecting protection gas, and the furnace body is connected with an exhaust pipe.

As a further alternative scheme of the graphitizing furnace, a plurality of feeding devices are arranged, and the feeding pipes of the plurality of feeding devices are uniformly distributed on the top end face of the furnace body.

As a further alternative to the graphitizing furnace, the graphitizing furnace further comprises a discharging device, wherein the discharging device comprises a discharging pipe and a second screw conveying mechanism;

One end of the discharging pipe is connected with the bottom end of the furnace body, the pipe cavity of the discharging pipe is communicated with the material chamber, and the second spiral conveying mechanism is arranged in the discharging pipe.

As a further alternative scheme of the graphitizing furnace, the discharging device further comprises a cooling jacket, the cooling jacket is sleeved on the discharging pipe, and a cooling channel through which a cooling medium can flow is formed between the cooling jacket and the discharging pipe.

As a further alternative scheme for the graphitizing furnace, a plurality of discharging devices are arranged, and the discharging pipes of the plurality of discharging devices are uniformly distributed on the end face of the bottom end of the furnace body;

The graphitizing furnace further comprises a discharge hopper, and the discharge hopper is respectively connected with one ends of the discharge pipes far away from the furnace body.

As a further alternative to the graphitizing furnace, the heating resistor layer is a graphite lining.

As a further alternative to the graphitizing furnace, the pair of heating electrodes includes a first electrode and a second electrode, the first electrode being located at one end of the material chamber in a first direction, and the second electrode being located at the other end of the material chamber in the first direction;

Wherein the first direction is a horizontal direction.

The embodiment of the utility model has the following beneficial effects:

When the graphitizing furnace is operated, the graphitized material is accommodated in the material chamber. The induction coil is electrified to enable the heating resistor layer to generate heat in an induction way, and the graphitized material is heated. Meanwhile, the heating electrode pair arranged at the inner periphery of the heating resistor layer is electrified, so that the graphitized material passing through the heating electrode pair generates current, and the electric energy is continuously converted into internal energy, so that the temperature of the graphitized material per se is increased. The graphitizing furnace adopts an electromagnetic induction heating mode and an electric heating mode to heat the material to be graphitized, so that the material to be graphitized is heated uniformly, and the uniformity of the performance of the product obtained through graphitizing is higher.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic diagram of an overall structure of a graphitizing furnace according to an embodiment of the present utility model;

fig. 2 shows a schematic structural diagram of a feeding device in a graphitizing furnace according to an embodiment of the present utility model;

Fig. 3 shows a schematic structural diagram of a discharging device in a graphitizing furnace according to an embodiment of the present utility model.

Description of main reference numerals:

100-furnace body, 101-material chamber, 110-exhaust pipe, 200-heating resistor layer, 300-induction coil, 400-heating electrode pair, 410-first electrode, 420-second electrode, 500-feeding device, 510-feeding pipe, 511-protection air pipe, 520-first spiral conveying mechanism, 521-first rotating shaft, 522-first spiral blade, 530-feeding hopper, 600-discharging device, 610-discharging pipe, 620-second spiral conveying mechanism, 621-second rotating shaft, 622-second spiral blade, 630-cooling jacket and 700-discharging hopper.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Examples

Referring to fig. 1, the present embodiment provides a graphitizing furnace, specifically a continuous induction graphitizing furnace, which includes a furnace body 100, a heating resistor layer 200, an induction coil 300, and a heating electrode pair 400.

The furnace body 100 is provided with a material chamber 101, wherein the material chamber 101 is used for containing materials to be graphitized.

The heating resistor layer 200 is located in the material chamber 101, and the heating resistor layer 200 is disposed on the inner sidewall of the furnace body 100 along the circumferential direction of the furnace body 100.

The induction coil 300 is arranged around the furnace body 100, and is matched with the heating resistor layer 200 to perform electromagnetic induction heating on the graphitized material.

The heating electrode pair 400 is located in the material chamber 101, and the heating electrode pair 400 is disposed at the inner periphery of the heating resistor layer 200, so as to electrically heat the material to be graphitized.

When the graphitization furnace is operated, the graphitized material is accommodated in the material chamber 101. The induction coil 300 is electrified to enable the heating resistor layer 200 to generate heat in an induction way, and the graphitized material is heated. Meanwhile, the heating electrode pair 400 disposed at the inner periphery of the heating resistor layer 200 is energized, so that the material to be graphitized passing through the heating electrode pair 400 generates current, and continuously converts the electric energy into internal energy, thereby raising its own temperature. The graphitizing furnace adopts an electromagnetic induction heating mode and an electric heating mode to heat the material to be graphitized, so that the material to be graphitized is heated uniformly, and the uniformity of the performance of the product obtained through graphitizing is higher.

Specifically, the heat-generating resistive layer 200 is a graphite lining.

The graphite lining is in a cylindrical shape and is attached to the inner side wall of the furnace body 100, and the length of the graphite lining along the axis direction of the graphite lining is equal to the height of the material chamber 101.

Specifically, the heating electrode pair 400 includes a first electrode 410 and a second electrode 420. One of the first electrode 410 and the second electrode 420 is a positive electrode, and the other is a negative electrode. In addition, the first electrode 410 is located at one end of the chamber 101 in the first direction, and the second electrode 420 is located at the other end of the chamber 101 in the first direction.

The first direction is a horizontal direction, and is schematically indicated by an X direction in the figure.

After the heating electrode pair 400 is electrified, an electric field is formed between the first electrode 410 and the second electrode 420, so that the material to be graphitized between the first electrode 410 and the second electrode 420 generates current, and the electric energy is continuously converted into internal energy, so that the temperature of the material to be graphitized is increased.

Illustratively, the first electrode 410 is a positive electrode and the second electrode 420 is a negative electrode.

In some embodiments, the first electrode 410 and the second electrode 420 are both columnar electrodes, and the first electrode 410 and the second electrode 420 are both disposed vertically.

Referring to fig. 2, in some embodiments, the graphitizing furnace further includes a feeding device 500, and the feeding device 500 includes a feeding pipe 510 and a first screw conveyor 520.

Wherein the feed tube 510 is disposed vertically. The bottom end of the feeding pipe 510 is connected with the top end of the furnace body 100, and the pipe cavity of the feeding pipe 510 is communicated with the material chamber 101.

Accordingly, a first screw conveyor 520 is disposed within the feed tube 510.

When the graphitized material feeding device is used, graphitized material enters the feeding pipe 510, the first spiral conveying mechanism 520 continuously feeds the graphitized material in the feeding pipe 510 into the material chamber 101, continuous feeding of the graphitized material is realized, and the feeding speed is controllable.

Specifically, the first screw conveyor 520 is composed of a first rotation shaft 521 and a first helical blade 522.

The first rotation shaft 521 is rotatably disposed in the feeding pipe 510, and the axis of the first rotation shaft 521 coincides with the axis of the feeding pipe 510. The first spiral vane 522 is spirally wound on the first rotating shaft 521, rotates along with the first rotating shaft 521, and pushes the material to be graphitized into the material chamber 101 during the rotation process.

Further, a protective gas pipe 511 into which protective gas is injected is connected to the side wall of the feed pipe 510, and an exhaust pipe 110 is connected to the furnace body 100.

In use, a shielding gas is injected into the shielding gas tube 511, causing the shielding gas to enter the feed tube 510. A portion of the shielding gas is exhausted from the end of the feed pipe 510 remote from the furnace body 100, and another portion of the shielding gas enters the material chamber 101 and is exhausted from the exhaust pipe 110 on the furnace body 100.

At this time, the micro-positive pressure environment is formed in the feeding pipe 510 and the furnace body 100, so that the external air can be prevented from entering, and the material to be graphitized is not easy to be oxidized.

Optionally, the shielding gas is argon, and the flow rate of the argon is Q, so that Q is more than or equal to 0.5m3/h and less than or equal to 5m3/h.

Alternatively, Q may be any of 0.5m3/h, 1m3/h, 1.5m3/h, 2m3/h, 2.5m3/h, 3m3/h, 3.5m3/h, 4m3/h, 4.5m3/h, 5m3/h, or 0.5m3/h to 5m 3/h.

Further, the feeding device 500 further comprises a feeding hopper 530, and the feeding hopper 530 is connected to the top end of the feeding tube 510.

The feed hopper 530 can guide the material to be graphitized into the feed pipe 510 while storing a certain amount of the material to be graphitized, avoiding interruption of the feeding process of the material to be graphitized.

In some embodiments, the feeding device 500 is provided with a plurality of feeding devices, and the feeding pipes 510 of the feeding devices 500 are uniformly distributed on the top end surface of the furnace body 100.

The user can select to use different numbers of feeding devices 500 to feed, adjust the feeding speed of the material to be graphitized, and can also select to use feeding devices 500 at different positions to feed, so that the material to be graphitized can be heated better.

Referring to fig. 3, in some embodiments, the graphitizing furnace further includes a discharging device 600, and the discharging device 600 includes a discharging pipe 610 and a second screw conveying mechanism 620.

Wherein the tapping pipe 610 is vertically disposed. The top end of the discharging pipe 610 is connected with the bottom end of the furnace body 100, and the pipe cavity of the discharging pipe 610 is communicated with the material chamber 101.

Accordingly, a second screw conveyor 620 is disposed within the discharge tube 610.

When the graphitized material discharging device is used, the product obtained through graphitization falls into the discharging pipe 610 from the bottom of the material chamber 101, the second spiral conveying mechanism 620 discharges the product in the discharging pipe 610, continuous discharging of the product is realized, the graphitized material discharging device is matched with continuous feeding of the graphitized material, and the discharging speed is controllable.

Specifically, the second screw conveyor 620 is composed of a second rotating shaft 621 and a second helical blade 622.

The second rotating shaft 621 is rotatably disposed in the discharging pipe 610, and the axis of the second rotating shaft 621 coincides with the axis of the discharging pipe 610. The second spiral blade 622 is spirally wound on the second rotating shaft 621, rotates along with the second rotating shaft 621, and pushes out the product from the discharging pipe 610 during the rotation.

Further, the outfeed device 600 also includes a cooling jacket 630. The cooling jacket 630 is sleeved on the discharge pipe 610, and a cooling channel through which the cooling medium can flow is formed between the cooling jacket 630 and the discharge pipe 610.

When the cooling device is used, the refrigerant continuously flows in the cooling channel, so that the heat of the product in the feeding pipe 510 can be absorbed, the cooling speed of the product is accelerated, and the product can be discharged in time.

In some embodiments, the discharging device 600 is provided with a plurality of discharging pipes 610 of the discharging device 600 are uniformly distributed on the bottom end surface of the furnace body 100, so as to achieve the purpose of uniform discharging.

Correspondingly, the graphitizing furnace further comprises a discharge hopper 700, and the top ends of the discharge hopper 700 are respectively connected with the bottom ends of the discharge pipes 610.

The product discharged through the plurality of discharge pipes 610 is collected in the hopper 700 and discharged from the bottom end of the hopper 700 for further bagging.

In summary, the feeding device 500 continuously feeds the material to be graphitized into the chamber 101 while the graphitization furnace is operated. The induction coil 300 is electrified to enable the heating resistor layer 200 to generate heat in an induction way, and the graphitized material is heated. Meanwhile, the heating electrode pair 400 disposed at the inner periphery of the heating resistor layer 200 is energized, so that the material to be graphitized passing through the heating electrode pair 400 generates current, and continuously converts the electric energy into internal energy, thereby raising its own temperature. Finally, the graphitized product is continuously discharged to the hopper 700 through the discharge device 600.

The graphitizing furnace adopts an electromagnetic induction heating mode and an electric heating mode to heat the material to be graphitized, so that the material to be graphitized is heated uniformly, and the uniformity of the performance of the product obtained through graphitizing is higher.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A graphitization furnace, comprising:

The furnace body is provided with a material chamber;

an induction coil disposed around the furnace body, and

2. The graphitization furnace of claim 1, further comprising a feed device comprising a feed pipe and a first screw conveyor;

3. The graphitization furnace of claim 2, wherein the feed device further comprises a feed hopper connected to an end of the feed tube remote from the furnace body.

4. The graphitizing furnace according to claim 2, wherein a protective gas pipe into which protective gas is injected is connected to a side wall of the feed pipe, and an exhaust pipe is connected to the furnace body.

5. The graphitization furnace according to claim 2, 3 or 4, wherein a plurality of the feeding devices are provided, and the feeding pipes of the plurality of the feeding devices are uniformly distributed on the top end face of the furnace body.

6. The graphitization furnace of claim 1, further comprising a discharge device comprising a discharge pipe and a second screw conveyor;

7. The graphitization furnace of claim 6, wherein the discharge device further comprises a cooling jacket, the cooling jacket is sleeved on the discharge pipe, and a cooling channel through which a cooling medium can flow is formed between the cooling jacket and the discharge pipe.

8. The graphitization furnace according to claim 6, wherein a plurality of discharging devices are provided, and the discharging pipes of the plurality of discharging devices are uniformly distributed on the bottom end face of the furnace body;

9. The graphitization furnace of claim 1, wherein the heat generating resistive layer is a graphite lining.

10. The graphitizing furnace of claim 1, wherein the pair of heating electrodes comprises a first electrode and a second electrode, the first electrode being located at one end of the plenum in a first direction, the second electrode being located at the other end of the plenum in the first direction;

Wherein the first direction is a horizontal direction.