A graphitization furnace with high discharge uniformity

Abstract

The present invention discloses a graphitization furnace with high discharge uniformity. The graphitization furnace includes a furnace body, wherein a hollow furnace core is provided within the furnace body. The furnace core extends laterally from one end of the furnace body to the other end. Both ends of the furnace core have openings communicating with the exterior of the furnace body. The furnace core is used to introduce carbon material to be graphitized. The furnace core of the graphitization furnace of the present invention heats the carbon material to be graphitized located therein, i.e., the heating temperature field is uniformly located on the outer periphery of the carbon material to be graphitized. This can uniformly heat the carbon material to be graphitized within the furnace core, thereby improving the uniformity of the graphitized product, reducing quality variations in the graphitized product, and improving product quality.

Description

Technical Field

[0001] The invention relates to graphitization equipment, in particular to a graphitization furnace with high discharge uniformity. Background Art

[0002] With the widespread application of lithium-ion batteries in electric vehicles and energy storage, the lithium battery industry continues to grow rapidly, placing higher demands on the graphitization of negative electrode materials. In the industrial production of carbon negative electrode materials for lithium-ion batteries, common carbonaceous materials must be heated above 2500°C to undergo graphitization. At this high temperature, all non-carbon residues are completely gasified and removed, producing artificial graphite with excellent crystallinity and very low impurity content. This process is commonly referred to in the industry as graphitization processing, and the corresponding equipment is called a graphitization furnace.

[0003] Currently, the main graphitization equipment for lithium-ion battery graphite negative electrode materials on the market includes Acheson graphitization furnaces, box-type furnaces, and internal string graphitization furnaces. However, existing graphitization treatment systems can result in certain variations in the degree of graphitization and uneven heating temperature fields, primarily due to temperature differences between the upper and lower layers of the furnace. This in turn leads to quality variations in graphitized products and poor product uniformity. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of uneven heating temperature field in the graphitization furnace in the prior art, mainly due to the temperature difference between the upper and lower layers in the furnace, which leads to poor product uniformity, and to provide a graphitization furnace with high discharge uniformity.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a graphitization furnace with high discharge uniformity, the graphitization furnace comprising a furnace body, a furnace core with a hollow structure provided in the furnace body, the furnace core extending transversely from one end of the furnace body to the other end, the two ends of the furnace core respectively having openings connected to the outside of the furnace body, and the furnace core is used to pass the carbon material to be graphitized.

[0007] In this solution, the above-mentioned structural form is adopted, and the furnace core heats the carbon material to be graphitized located inside it, that is, the heating temperature field is uniformly located on the outer peripheral side of the carbon material to be graphitized, which can uniformly heat the carbon material to be graphitized inside the furnace core, thereby improving the uniformity of the graphitized product, reducing the quality difference of the graphitized product, and improving the quality of the product.

[0008] Preferably, the furnace core is made of graphite.

[0009] In this solution, graphite, with its excellent thermal conductivity, is used as an intermediate to heat the carbon material to be graphitized, effectively reducing energy loss during heat conduction and, in turn, lowering costs. Furthermore, the use of graphite in the furnace core prevents contamination of the graphitized product caused by using other materials.

[0010] Preferably, the graphitization furnace further includes an electric heating device, and the electric heating device is used to heat the furnace core.

[0011] In this solution, the above-mentioned structural form is adopted, and the furnace core is electrically heated by the electric heating device. The furnace core transfers heat to the carbon material to be graphitized to achieve high-temperature graphitization, which facilitates the control and maintenance of the stability of the heating temperature.

[0012] Preferably, a heat-insulating material is provided in the furnace body, and the heat-insulating material is provided on the outer peripheral side of the furnace core.

[0013] In this solution, the above-mentioned structural form is adopted, and by filling the outer peripheral side of the furnace core with insulation material, as the temperature inside the furnace body rises, the insulation material can prevent heat loss, reduce heat energy loss, and effectively reduce energy consumption.

[0014] Preferably, the thermal insulation material is made of carbon black.

[0015] In this solution, the above-mentioned structural form is adopted, and the characteristics of carbon black, such as high resistivity, electrical resistance and heat preservation, are utilized to use carbon black as a heat-insulating material to effectively reduce the loss of heat energy.

[0016] Preferably, the graphitization furnace further includes an exhaust pipe, one end of the exhaust pipe is connected to the furnace core, and the other end of the exhaust pipe extends out of the furnace body.

[0017] In this solution, the above-mentioned structural form is adopted so that the gas generated by the carbon material to be graphitized in the furnace core after high-temperature graphitization can be discharged through the exhaust pipe, thereby preventing the gas from accumulating in the furnace core and affecting the product quality and the safe operation of the equipment.

[0018] Preferably, a high-temperature resistant filter is provided in the exhaust duct.

[0019] In this solution, the above-mentioned structural form is adopted to filter the gas generated by the high-temperature graphitization of the carbon material to be graphitized in the furnace core through the filter element, thereby reducing air emission pollution.

[0020] Preferably, the filter element is graphitized coke particles.

[0021] In this solution, the above-mentioned structural form is adopted, and graphitized coke particles are used to filter the gas in the exhaust pipe, which effectively plays a role in purifying emissions. In addition, the graphitized coke particles are resistant to high temperatures and can avoid being damaged by high temperatures, which affects the filtering effect.

[0022] Preferably, the exhaust duct includes a plurality of exhaust branch pipes, which are arranged at intervals along the extension direction of the furnace core, and one end of each of the exhaust branch pipes is connected to the inner cavity of the furnace core, and the other end is connected to the outside of the furnace body.

[0023] In this solution, the above-mentioned structural form is adopted, and the gas in the furnace core is discharged through multiple exhaust branches located at different positions. The gas generated by the graphitized carbon material in the furnace core after high-temperature graphitization can be discharged in time, avoiding gas blockage inside the furnace core, thereby affecting the quality of the graphitized product.

[0024] Preferably, the exhaust duct further includes a connecting pipe and an outlet pipe that are interconnected, the connecting pipe is configured to connect ends of a plurality of the exhaust branch pipes away from the furnace core, and the outlet pipe is connected to a side wall of the connecting pipe.

[0025] In this solution, the above-mentioned structural form is adopted to collect the exhaust gases from multiple exhaust branches through a connecting pipeline and then discharge them through the outlet pipeline, thereby effectively controlling the number and position of the final gas exhaust ports, thereby reducing the number of purification devices connected to the final gas exhaust ports and reducing costs.

[0026] Preferably, the graphitization furnace further comprises a feeding assembly, wherein the feeding assembly is connected to the feeding port of the furnace core, and the feeding assembly is used to deliver the carbon material to be graphitized into the furnace core.

[0027] In this solution, the above-mentioned structural form is adopted, and the carbon material to be graphitized is fed into the furnace core through the feeding assembly, thereby improving the degree of automation, reducing labor costs, and improving production efficiency.

[0028] Preferably, the feeding assembly includes a screw pusher, and the discharge port of the screw pusher is connected to the feeding port.

[0029] In this solution, the above-mentioned structural form is adopted, and the spiral pusher transports the carbon material to be graphitized into the furnace core, thereby achieving the continuity of the graphitization process, high transportation efficiency, and thus accelerating the graphitization process. It is safe, reliable, and has good sealing performance.

[0030] Preferably, the feeding assembly further comprises a silo, and the discharge port of the silo is connected to the feeding port of the screw pusher.

[0031] In this solution, the aforementioned structure is adopted, with the silo and screw pusher working together to achieve automated feeding, resulting in a compact structure and high conveying efficiency. Furthermore, compared with the traditional graphitization furnace method of manually feeding, the silo-based feeding method effectively reduces the risk factor and prevents dust from the graphitized carbon material from affecting workers' health.

[0032] Preferably, a control valve is provided at the discharge port of the silo, and the control valve is configured to control the amount of the carbon material to be graphitized entering the furnace core by adjusting the opening of the control valve.

[0033] In this solution, the above-mentioned structural form can be used to adjust the amount of carbon material that needs to be graphitized through the control valve according to actual working conditions, which is highly flexible.

[0034] Preferably, the furnace body comprises an aluminum silicate shell, and the furnace core is arranged through the aluminum silicate shell;

[0035] And / or, a furnace protection belt is provided on the outer peripheral wall of the furnace body.

[0036] In this solution, the above structure is adopted and the high temperature resistance of aluminum silicate is utilized to allow the furnace core and the carbon material to be graphitized to be heated inside the furnace body, thereby improving the reliability of the graphitization furnace. The furnace body is protected by a furnace guard.

[0037] Preferably, a manhole is provided on the wall of the furnace body;

[0038] And / or, the graphitization furnace further includes a base, and the furnace body is placed on the base.

[0039] In this solution, the above-mentioned structure is adopted, and a manhole is opened on the wall of the furnace body to facilitate workers to observe or inspect the graphitization furnace. The furnace body is placed on a base to facilitate the placement of the furnace body and the movement of the furnace body according to actual working conditions.

[0040] The positive progress effect of the present invention is:

[0041] The furnace core of the graphitization furnace in the present invention heats the carbon material to be graphitized located therein, that is, the heating temperature field is uniformly located on the outer periphery of the carbon material to be graphitized, and the carbon material to be graphitized inside the furnace core can be uniformly heated, thereby improving the uniformity of the graphitized product, reducing the quality difference of the graphitized product, and improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a front view of a graphitization furnace according to a preferred embodiment of the present invention.

[0043] Figure 2 FIG. 1 is a top view of a graphitization furnace according to a preferred embodiment of the present invention.

[0044] Figure 3 for Figure 2 AA cross-section diagram.

[0045] Figure 4 for Figure 2 BB cross-section diagram.

[0046] Figure 5 Schematic diagram of the installation of the positive electrode electrical connection assembly of a preferred embodiment of the present invention.

[0047] Figure 6 Schematic diagram of the installation of the negative electrode electrical connection assembly of a preferred embodiment of the present invention.

[0048] Description of reference numerals:

[0049] Furnace body 1

[0050] Furnace core 2

[0051] Feed port 21

[0052] Feeding section 22

[0053] Discharging section 23

[0054] Section 1 231

[0055] Section 232

[0056] Discharge port 233

[0057] Electric heating device 3

[0058] Positive electrode electrical connection assembly 31

[0059] Positive aluminum busbar 311

[0060] First electrode soft connection copper bus 312

[0061] Electrode positive electrode 313

[0062] First connecting member 314

[0063] Second connecting member 315

[0064] Negative electrode electrical connection assembly 32

[0065] Negative aluminum busbar 321

[0066] Second electrode soft connection copper bus 322

[0067] Electrode negative electrode 323

[0068] The third connecting member 324

[0069] Fourth connecting member 325

[0070] Insulation material 4

[0071] Exhaust duct 5

[0072] Filter 51

[0073] Exhaust branch pipe 52

[0074] Connecting pipe 53

[0075] Outlet pipe 54

[0076] Feed assembly 6

[0077] Screw pusher 61

[0078] Silo 62

[0079] Main body 621

[0080] tapered portion 622

[0081] Control valve 63

[0082] Cooling assembly 7

[0083] Liquid cooling pipe 71

[0084] Internal and external water-cooled spiral cooler 72

[0085] Furnace protection belt 8

[0086] Manhole 9

[0087] Base 10

[0088] Feed section tightening device 101

[0089] Discharge section tightening device 102 DETAILED DESCRIPTION

[0090] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0091] Please combine Figures 1 to 3For understanding, the embodiment of the present invention provides a graphitization furnace with high discharge uniformity. The graphitization furnace includes a furnace body 1, in which a hollow furnace core 2 is provided. The furnace core 2 extends horizontally from one end of the furnace body 1 to the other end. Both ends of the furnace core 2 have openings connected to the outside of the furnace body 1. The furnace core 2 is used to introduce carbon materials to be graphitized. The furnace core 2 provides a moving space for the carbon materials to be graphitized from the furnace head to the furnace tail. The carbon materials to be graphitized are put into the furnace core 2 from the furnace head of the furnace core 2. After high-temperature graphitization in the furnace core 2, the graphitized products are output from the furnace head of the furnace core 2. The furnace core 2 heats the carbon materials to be graphitized located therein, that is, the heating temperature field is uniformly located on the outer periphery of the carbon materials to be graphitized, which can uniformly heat the carbon materials to be graphitized in the furnace core 2, thereby improving the uniformity of the graphitized products, reducing the quality differences of the graphitized products, and improving the quality of the products.

[0092] In this embodiment, the furnace core 2 is made of graphite, meaning it is enclosed by graphite. Graphite has excellent thermal conductivity. Using graphite as an intermediate to heat the carbon material to be graphitized effectively reduces energy loss during heat conduction, thereby effectively lowering costs. Furthermore, using graphite as the material for the furnace core 2 prevents contamination of the graphitized product that would occur if the furnace core 2 were made of other materials.

[0093] In this embodiment, if Figure 1 As shown, the graphitization furnace also includes an electric heating device 3, which is used to heat the furnace core 2. Specifically, at least a portion of the electric heating device 3 extends into the interior of the furnace body 1 to heat the furnace core 2. The electric heating device 3 electrically heats the furnace core 2, which transfers heat to the carbon material to be graphitized, achieving high-temperature graphitization and facilitating control and maintaining a stable heating temperature.

[0094] When graphite is used as the furnace core 2, graphite has excellent electrical conductivity, and the electric heating device 3 heats the graphite by electricity, which can effectively reduce energy consumption.

[0095] In this embodiment, if Figure 1 and Figure 3As shown, the electric heating device 3 includes a positive electrical connection assembly 31 and a negative electrical connection assembly 32. One end of the positive electrical connection assembly 31 is used to electrically connect to the positive pole of the power supply. The furnace core 2 is made of graphite, and the other end of the positive electrical connection assembly 31 is electrically connected to one end of the furnace core 2. One end of the negative electrical connection assembly 32 is used to electrically connect to the negative pole of the power supply, and the other end of the negative electrical connection assembly 32 is electrically connected to the other end of the furnace core 2. When the positive electrical connection assembly 31 and the negative electrical connection assembly 32 are energized to the positive pole of the power supply and the negative pole of the power supply, respectively, a closed circuit is formed between the positive pole of the power supply, the positive electrical connection assembly 31, the furnace core 2, the negative electrical connection assembly 32, and the negative pole of the power supply, thereby achieving electrical heating of the furnace core 2, making it easier for workers to control the working status of the electric heating device 3, and thereby improving the safety and reliability of the graphitization operation.

[0096] In this embodiment, if Figure 1 and Figure 5 As shown, the positive electrode electrical connection assembly 31 includes a positive electrode aluminum busbar 311, a first electrode flexible copper busbar 312, and an electrode positive member 313, which are connected in sequence. The positive electrode of the power supply is electrically connected to the positive electrode aluminum busbar 311, and the electrode positive member 313 is electrically connected to the furnace core 2. In other words, the positive electrode of the power supply, the positive electrode aluminum busbar 311, the first electrode flexible copper busbar 312, the electrode positive member 313, and the furnace core 2 are electrically connected in sequence, utilizing the excellent conductivity of aluminum and copper to effectively improve the safety and reliability of the electrical connection of the positive electrode electrical connection assembly 31.

[0097] In this embodiment, if Figure 5 As shown, a positive aluminum bar 311 is positioned beneath the furnace body 1. Two first flexible copper bars 312 extend upward from each end of the positive aluminum bar 311. The other ends of the first flexible copper bars 312 are connected to positive electrode components 313 located on either side of the furnace core 2. The positive electrode components 313 extend into the furnace body 1 and are electrically connected to the furnace core 2. The interconnected positive aluminum bar 311, first flexible copper bars 312, and positive electrode components 313 form a frame structure that is attached to the furnace body 1, improving the installation stability of the positive electrode electrical connection assembly 31. Furthermore, the positive electrode components 313 provide power to both sides of the furnace core 2, improving the uniformity of the heating process during heating.

[0098] In some embodiments, the positive electrode member 313 is provided with a first liquid cooling jacket, which is used to connect to a circulating coolant. The first liquid cooling jacket cools the positive electrode member 313, reducing or preventing damage to the positive electrode member 313 caused by deformation or softening due to prolonged exposure to high temperatures, thereby effectively increasing the service life of the positive electrode member 313. The positive electrode aluminum busbar 311 and the first flexible copper busbar 312 are connected via a first connector 314, while the first flexible copper busbar 312 and the positive electrode member 313 are connected via a second connector 315. The first connector 314 clamps and secures the positive electrode aluminum busbar 311 and the first flexible copper busbar 312, while the second connector 315 clamps and secures the first flexible copper busbar 312 and the positive electrode member 313. This provides a strong securement between the positive electrode aluminum busbar 311, the first flexible copper busbar 312, and the positive electrode member 313, thereby improving the connection stability between the components within the positive electrode electrical connection assembly 31. For example, the first connecting member 314 may be an aluminum plate, and the second connecting member 315 may be an electrode flexible connecting plate.

[0099] In this embodiment, if Figure 1 and Figure 6 As shown, the negative electrode electrical connection assembly 32 includes a negative electrode aluminum bar 321, a second electrode flexible copper bar 322, and an electrode negative pole piece 323. The negative electrode of the power supply is electrically connected to the negative electrode aluminum bar 321, and the electrode negative pole piece 323 is electrically connected to the furnace core 2. In other words, the negative electrode of the power supply, the negative electrode aluminum bar 321, the second electrode flexible copper bar 322, the electrode negative pole piece 323, and the furnace core 2 are electrically connected in sequence, taking advantage of the excellent conductivity of aluminum and copper, effectively improving the safety and reliability of the electrical connection of the negative electrode electrical connection assembly 32.

[0100] In this embodiment, if Figure 6 As shown, a negative aluminum bar 321 is positioned below the furnace body 1. Two second electrode flexible copper bars 322 extend upward from each end of the negative aluminum bar 321. The other ends of the second electrode flexible copper bars 322 are connected to negative electrode members 323 located on either side of the furnace core 2. The negative electrode members 323 extend into the furnace body 1 and are electrically connected to the furnace core 2. The interconnected negative aluminum bar 321, second electrode flexible copper bar 322, and negative electrode members 323 form a frame structure that is hung on the furnace body 1, improving the installation stability of the negative electrode electrical connection assembly 32.

[0101] In some embodiments, the negative electrode member 323 is provided with a second liquid cooling jacket for communicating with a circulating coolant. This second liquid cooling jacket cools the negative electrode member 323, reducing or preventing damage to the negative electrode member 323 caused by prolonged exposure to high temperatures, such as deformation and softening, thereby effectively extending the service life of the negative electrode member 323. The negative electrode aluminum busbar 321 and the second electrode flexible copper busbar 322 are connected via a third connector 324, while the second electrode flexible copper busbar 322 and the negative electrode member 323 are connected via a fourth connector 325. The third connector 324 clamps and secures the negative electrode aluminum busbar 321 and the second electrode flexible copper busbar 322, while the fourth connector 325 clamps and secures the second electrode flexible copper busbar 322 and the negative electrode member 323. This provides a strong securement between the negative electrode aluminum busbar 321, the second electrode flexible copper busbar 322, and the negative electrode member 323, thereby improving the connection stability between the internal components of the negative electrode electrical connection assembly 32. For example, the third connecting member 324 may be an aluminum plate, and the fourth connecting member 325 may be an electrode flexible connecting plate.

[0102] In this embodiment, if Figure 3 、 Figure 5 and Figure 6 As shown, the furnace body 1 is provided with a heat-insulating material 4, which is arranged on the outer periphery of the furnace core 2. By filling the outer periphery of the furnace core 2 with the heat-insulating material 4, as the temperature inside the furnace body 1 rises, the heat-insulating material 4 can prevent heat loss, reduce heat energy loss, and effectively reduce energy consumption.

[0103] In this embodiment, the material of the heat-insulating material 4 is carbon black. Taking advantage of the characteristics of carbon black's high resistivity, electrical resistance and heat-insulating properties, carbon black is used as the heat-insulating material 4 to effectively reduce heat energy loss.

[0104] In this embodiment, if Figure 3 As shown, the graphitization furnace also includes an exhaust duct 5, one end of which is connected to the furnace core 2 and the other end of which extends out of the furnace body 1. This allows gases generated by the high-temperature graphitization of the carbon material to be graphitized in the furnace core 2 to be discharged through the exhaust duct 5, preventing gas accumulation in the furnace core 2 and affecting product quality and safe operation of the equipment. A carbon steel pipe can be used for the exhaust duct 5.

[0105] Preferably, the other end of the exhaust pipe 5 is connected to a purification device, and the purification device purifies the gas discharged from the exhaust pipe 5 to reduce air pollution.

[0106] In this embodiment, if Figure 3 As shown, a high temperature resistant filter element 51 is provided in the exhaust pipe 5. The filter element 51 filters the gas generated by the carbon material to be graphitized in the furnace core 2 after high temperature graphitization, thereby reducing air emission pollution.

[0107] Preferably, filter element 51 is made of graphitized coke particles. Using graphitized coke particles to filter the gas within exhaust duct 5 effectively purifies emissions. Graphitized coke particles are also heat-resistant, preventing damage from high temperatures that could affect the filtering effect. Specifically, filter element 51 utilizes graphitized coke particles of varying particle sizes, creating numerous pores within filter element 51 formed by the accumulation of graphitized coke particles, allowing gas to pass through. In other embodiments, filter element 51 may also utilize other high-temperature-resistant filter materials.

[0108] In this embodiment, if Figure 3 As shown, the exhaust duct 5 includes multiple exhaust branch pipes 52, which are spaced apart along the extension direction of the furnace core 2. One end of each exhaust branch pipe 52 is connected to the inner cavity of the furnace core 2, and the other end is connected to the exterior of the furnace body 1. Gas in the furnace core 2 is discharged through the multiple exhaust branch pipes 52 located at different positions. Gas generated by the high-temperature graphitization of the graphitized carbon material in the furnace core 2 can be discharged in a timely manner, preventing gas from clogging the furnace core 2 and affecting the quality of the graphitized product.

[0109] In this embodiment, if Figure 3 As shown, the exhaust duct 5 further includes a connecting pipe 53 and an outlet pipe 54, which are interconnected. The connecting pipe 53 is configured to connect the ends of the multiple exhaust branch pipes 52 away from the furnace core 2. The outlet pipe 54 is connected to the side wall of the connecting pipe 53. The exhaust gas from the multiple exhaust branch pipes 52 is collected together through the connecting pipe 53 and then discharged through the outlet pipe 54, effectively controlling the number and location of the final gas discharge ports, thereby reducing the number of purification devices connected to the final gas discharge ports and reducing costs.

[0110] Specifically, if Figure 3 As shown, five exhaust branch pipes 52 are spaced apart along the extension direction of the furnace core 2. The two ends of a connecting pipe 53 are connected to the exhaust branch pipes 52 at both ends, and the five exhaust branch pipes 52 are connected together. An outlet pipe 54 is connected to the middle of the connecting pipe 53. It should be noted that the number of exhaust branch pipes 52 and the installation position of the outlet pipe 54 can be selected according to actual needs and are not limited here.

[0111] In this embodiment, multiple exhaust branch pipes 52, connecting pipes 53 and outlet pipes 54 are integrally formed, which improves the assembly efficiency of the exhaust pipe 5 and prevents gas from leaking from the connections between the exhaust branch pipes 52, connecting pipes 53 and outlet pipes 54.

[0112] In other embodiments, the exhaust branch pipe 52 and the connecting pipe 53 are connected by a connector, and the connecting pipe 53 and the outlet pipe 54 are also connected by a connector, so that the number of the exhaust branch pipes 52 can be adjusted according to actual conditions.

[0113] In this embodiment, if Figure 1 and Figure 3 As shown, the graphitization furnace further includes a feed assembly 6, which is connected to the feed port 21 of the furnace core 2 and is used to deliver the carbon material to be graphitized into the furnace core 2. The carbon material to be graphitized is fed into the furnace core 2 through the feed assembly 6, thereby improving the degree of automation, reducing labor costs, and improving production efficiency.

[0114] In this embodiment, the feed assembly 6 includes a screw pusher 61, the discharge port of which is connected to the feed port 21. The screw pusher 61 transports the carbon material to be graphitized into the furnace core 2, ensuring continuity of the graphitization process. This high transport efficiency accelerates the graphitization process, and is safe, reliable, and has good sealing performance. The specific structure and operating principle of the screw pusher 61 are well known to those skilled in the art and will not be described in detail here.

[0115] In this embodiment, the graphitization furnace also includes a feeding section 22, which is a cylindrical structure. The feeding section 22 is located outside the furnace body 1 and close to one end of the positive electrode electrical connection assembly 31. The feeding port of the feeding section 22 is connected to the discharging port of the screw pusher 61, and the discharging port of the feeding section 22 is connected to the feeding port 21 of the furnace core 2. The screw pusher 61 is used to deliver the carbon material to be graphitized into the furnace core 2 through the feeding section 22.

[0116] In this embodiment, the furnace core 2 is coaxial with the feeding section 22 and extends in the horizontal direction, so that the carbon material to be graphitized in the feeding section 22 can be smoothly delivered to the furnace core 2, thereby preventing the carbon material to be graphitized from being blocked in the feeding section 22.

[0117] In this embodiment, the feeding assembly 6 also includes a silo 62, and the discharge port of the silo 62 is connected to the feed port of the screw pusher 61. The carbon material to be graphitized is put into the silo 62 and output from the discharge port of the silo 62. The screw pusher 61 transports the carbon material output from the discharge port of the silo 62 to achieve feeding. The silo 62 and the screw pusher 61 cooperate with each other to realize automatic feeding, with a compact structure and high conveying efficiency. In addition, compared with the traditional graphitization furnace using manual feeding, the feeding method through the silo 62 effectively reduces the risk factor and avoids the dust in the carbon material to be graphitized from affecting the health of workers.

[0118] In this embodiment, a control valve 63 is provided at the discharge port of the silo 62. The control valve 63 is configured to control the amount of carbon material to be graphitized entering the furnace core 2 by adjusting the opening of the control valve 63. The amount of carbon material to be graphitized can be adjusted by the control valve 63 according to actual operating conditions, providing a high degree of flexibility.

[0119] In this embodiment, the hopper 62 comprises a main body 621 and a tapered portion 622, which are interconnected. The tapered portion 622 is connected below the main body 621. The tapered portion 622 provides a material discharge channel from the main body 621 to the feed port of the screw pusher 61, providing a rational spatial layout. Furthermore, the wall surface of the tapered portion 622 can bear some of the pressure from the carbon material to be graphitized.

[0120] In this embodiment, the feeding channel in the silo 62 is arranged vertically to ensure that the carbon material to be graphitized in the silo 62 can fall smoothly, and prevent the carbon material to be graphitized from being blocked in the silo 62 during the feeding process.

[0121] Specifically, if Figure 1 As shown, the main body 621 adopts a tubular structure, the axis of the main body 621 is vertically arranged, the opening of the tapered portion 622 faces upward, and the axis of the tapered portion 622 is vertically arranged.

[0122] In this embodiment, the silo 62 is further provided with an upper cover, one side of which is hingedly connected to the main body 621. The upper cover is used to seal the feed opening of the silo 62. The upper cover seals the feed opening of the silo 62, allowing gases generated by the heated carbon material to be graphitized in the furnace core 2 to escape from the feed opening of the silo 62, thereby preventing any impact on workers' health.

[0123] In this embodiment, a vibration mechanism is further provided on the silo 62. The vibration mechanism is used as a vibration source to vibrate the wall of the silo 62, so that the carbon material to be graphitized in the silo 62 can fall smoothly and avoid being blocked in the silo 62.

[0124] The graphitization furnace also includes a feed section tightening device 101, which is disposed at one end of the feed section 22 near the screw pusher 61. The feed section tightening device 101 is used to apply force to the feed section 22 toward the furnace core 2. This reduces or prevents the feed section 22 from vigorous shaking during the operation of the screw pusher 61, thereby securing and protecting the furnace core 2.

[0125] In this embodiment, the inner diameter of the feed section 22 is larger than the inner diameter of the furnace core 2. As the carbon material to be graphitized in the feed section 22 is fed into the furnace core 2, the carbon material to be graphitized can fill the space within the furnace core 2 as much as possible, thereby improving space utilization and graphitization efficiency. In other embodiments, the inner diameter of the feed section 22 is the same as the inner diameter of the furnace core 2.

[0126] In this embodiment, the material of the feed section 22 is graphite to avoid contamination of the carbon material to be graphitized due to the use of other materials in the feed section 22 .

[0127] In this embodiment, if Figure 3 and Figure 4 As shown, the graphitization furnace includes a discharge section 23, which is located outside the furnace body 1 and communicates with the furnace core 2. Specifically, the discharge section 23 is located near one end of the negative electrode electrical connection assembly 32. The discharge section 23 is provided with a cooling assembly 7, which is used to cool the graphitized product within the discharge section 23. During the discharge process, the graphitized product within the furnace core 2 is cooled by the cooling assembly 7 to reduce the temperature of the graphitized product to room temperature. In other words, the discharge and cooling processes of the graphitized product occur simultaneously, further ensuring the continuity of the graphitization process, shortening the production cycle, and improving the graphitization efficiency.

[0128] In this embodiment, the material of the discharge section 23 is graphite to avoid contamination of the graphitized product caused by using other materials for the discharge section 23 .

[0129] In this embodiment, a liquid cooling channel is provided in the discharge section 23 and on the peripheral side of the inner cavity of the discharge section 23, and the cooling assembly 7 is arranged in the liquid cooling pipe. The graphitized product inside the discharge section 23 is cooled by the liquid cooling channel inside the discharge section 23. The spatial layout is reasonable and the graphitized product is effectively cooled. The liquid cooling channel is located on the peripheral side of the graphitized product, which can also ensure the uniformity of cooling and avoid the problem of poor product uniformity caused by uneven cooling speed of the graphitized product. Furthermore, the cooling assembly 7 includes a liquid cooling pipe 71, at least part of the liquid cooling pipe 71 passes through the liquid cooling channel, and the liquid cooling pipe 71 is connected to the external circulating coolant system. When the coolant flows through the liquid cooling pipe 71, the graphitized product is cooled by cooling the liquid cooling pipe, thereby effectively cooling the graphitized product.

[0130] In other embodiments, a liquid cooling channel is provided within the discharge section 23 and on the outer periphery of the inner cavity of the discharge section 23, and the cooling assembly 7 is connected to the liquid cooling channel. Furthermore, the cooling assembly 7 includes a liquid cooling channel 71 and a water nozzle. The inlet and outlet of the liquid cooling channel are each provided with a water nozzle, which is connected to an external circulating coolant system via the liquid cooling channel 71. Coolant flows from the liquid cooling channel 71 through the water nozzle into the liquid cooling channel to cool the graphitized product. The water nozzle and liquid cooling channel 71 are installed outside the liquid cooling channel, facilitating installation and controlling the operating status of the cooling assembly 7, thereby achieving high reliability.

[0131] In this embodiment, there are multiple liquid cooling channels, which are spaced apart in the discharge section 23 along the extension direction of the discharge section 23. The multiple liquid cooling channels are installed separately, which can effectively improve the cooling efficiency of the graphitized product.

[0132] In other embodiments, the liquid cooling channel is spirally arranged within the discharge section 23 along the extension direction of the discharge section, facilitating its installation. Furthermore, the liquid cooling channel has a liquid inlet at the end near the furnace core 2 and a liquid outlet at the end away from the furnace core 2. As the graphitized product moves within the discharge section 23, the temperature of the graphitized product near the furnace core 2 is higher than that of the graphitized product away from the furnace core 2. Coolant flows into the liquid cooling pipe 1 from the liquid inlet near the furnace core 2, effectively reducing the temperature.

[0133] In this embodiment, the graphitization furnace also includes an internal and external water-cooled spiral cooler 72, and the discharge port 233 of the discharge section 23 is connected to the feed port of the internal and external water-cooled spiral cooler 72. The graphitized product is cooled by the internal and external water-cooled spiral cooler 72 and then discharged from the furnace, thereby achieving the continuity of graphitization. In addition, the liquid cooling pipe 71 is used to perform the first cooling of the graphitized product, and the internal and external water-cooled spiral cooler 72 is used to perform the second cooling of the graphitized product output from the discharge port 223. The graphitized product is cooled by continuous double cooling, and the cooling effect is good, which further accelerates the cooling rate of the graphitized product and improves production efficiency. Among them, the internal and external water-cooled spiral cooler 72 includes internal water cooling and external water cooling. The specific structure and working principle of the internal and external water-cooled spiral cooler 72 are well known to those skilled in the art and will not be repeated here.

[0134] In this embodiment, if Figure 3 As shown, the discharge section 23 comprises a first section 231 and a second section 232 connected at a preset angle. The second section 232 extends downward from the end of the first section 231 away from the furnace body 1. The interconnected first and second sections 231, 232, forming the discharge section 23, extend the cooling path of the graphitized product. The downward bend of the second section 232 not only reduces the overall length of the graphitization furnace, effectively reducing the space occupied by the graphitization furnace, but also facilitates connection to the internal and external water-cooled spiral coolers 72. Specifically, the first section 231 and the second section 232 are arranged at a 90-degree angle.

[0135] The graphitization furnace also includes a discharge section tightening device 102, which is disposed at the end of the first section 231 away from the furnace core 2. The discharge section tightening device 102 is used to apply force to the first section 231 toward the furnace core 2. This reduces or prevents severe shaking of the discharge section 23 during operation of the cooling assembly 7, thereby securing and protecting the furnace core 2.

[0136] In some embodiments, the furnace body 1 includes an aluminum silicate shell, and the furnace core 2 is set through the aluminum silicate shell. By utilizing the high temperature resistance of aluminum silicate, the furnace core 2 and the carbon material to be graphitized can be heated inside the furnace body 1, thereby improving the reliability of the graphitization furnace. For example, the aluminum silicate shell has a rectangular shape. The outer wall of the furnace body 1 is provided with a furnace guard 8, which protects the furnace body 1. Specifically, Figure 1 and Figure 2 As shown, at least part of the furnace protection belt 8 circumferentially surrounds the outer peripheral side of the furnace body 1 along the length direction and / or width direction of the furnace body 1 .

[0137] In some embodiments, as Figure 2 As shown, a manhole 9 is provided on the wall of the furnace body 1 so that workers can observe or inspect the graphitization furnace. Specifically, four manholes 9 are dispersedly provided on the upper wall of the furnace body 1. It should be noted that the number of manholes 9 can be selected according to actual needs and is not limited here. Figure 1 and Figure 3 As shown, the graphitization furnace further includes a base 10 , and the furnace body 1 is placed on the base 10 , so as to facilitate placement of the furnace body 1 and movement of the furnace body 1 according to actual working conditions.

[0138] In specific implementation, the carbon material to be graphitized is fed from the hopper 62. The opening of the control valve 63 is adjusted to control the amount of carbon material to be graphitized output from the outlet of the hopper 62. The screw pusher 61 delivers the carbon material to be graphitized into the furnace core 2. During this process, the positive and negative electrical connection assemblies 31 and 32 energize and heat the furnace core 2 to perform high-temperature graphitization on the carbon material to be graphitized moving within the furnace core 2. The gases generated by the heated carbon material are discharged to the outside of the furnace body 1 through the exhaust pipe 5. After high-temperature graphitization, the carbon material forms a graphitized product, which is then cooled in turn by passing through the liquid cooling pipe 71 and the internal and external water-cooled spiral coolers 72 to reduce the temperature of the graphitized product to room temperature. It can be seen that the steps of feeding, heating, cooling and unloading can all be completed by the graphitization furnace, without the need to complete the aforementioned operations separately in different equipment, thereby improving the continuity of the graphitization process and effectively reducing the production cycle. In addition, the graphitization furnace in this embodiment has a high degree of automation, which effectively reduces labor costs.

[0139] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A graphitization furnace with high discharge uniformity, characterized in that: The graphitization furnace includes a furnace body, wherein a hollow furnace core is provided in the furnace body, wherein the furnace core extends transversely from one end of the furnace body to the other end, and each end of the furnace core has an opening communicating with the outside of the furnace body, and the furnace core is used to introduce the carbon material to be graphitized; the furnace core is made of graphite; The graphitization furnace further includes an electric heating device for heating the furnace core. A heat-insulating material is provided in the furnace body. The heat-insulating material is provided on the outer periphery of the furnace core. The heat-insulating material is made of carbon black. The graphitization furnace further includes an exhaust pipe, one end of which is in communication with the furnace core, and the other end of which extends out of the furnace body. A high-temperature resistant filter element is provided in the exhaust pipe, and the filter element is graphitized coke particles. The exhaust duct includes a plurality of exhaust branch pipes, which are arranged at intervals along the extension direction of the furnace core, and one end of each of the exhaust branch pipes is connected to the inner cavity of the furnace core, and the other end is connected to the outside of the furnace body; The exhaust duct further includes a connecting pipe and an outlet pipe that are interconnected, wherein the connecting pipe is configured to connect ends of the plurality of exhaust branch pipes away from the furnace core, and the outlet pipe is connected to a side wall of the connecting pipe; The graphitization furnace further includes a feeding assembly, which is connected to the feeding port of the furnace core and is used to feed the carbon material to be graphitized into the furnace core.

2. The graphitization furnace with high discharge uniformity according to claim 1, characterized in that: The feeding assembly includes a screw pusher, and the discharge port of the screw pusher is connected to the feeding port.

3. The graphitization furnace with high discharge uniformity according to claim 2, characterized in that: The feeding assembly further comprises a silo, the discharge port of which is in communication with the feeding port of the screw pusher.

4. The graphitization furnace with high discharge uniformity according to claim 3, characterized in that: The discharge port of the silo is provided with a control valve, and the control valve is configured to control the amount of the carbon material to be graphitized entering the furnace core by adjusting the opening of the control valve.

5. The graphitization furnace with high discharge uniformity according to claim 1, characterized in that: The furnace body includes an aluminum silicate shell, and the furnace core is arranged through the aluminum silicate shell; And / or, a furnace protection belt is provided on the outer peripheral wall of the furnace body.

6. The graphitization furnace with high discharge uniformity according to claim 1, characterized in that: A manhole is provided on the wall of the furnace body; And / or, the graphitization furnace further includes a base, and the furnace body is placed on the base.

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