Special furnace for graphitization production process

Abstract

The utility model discloses a special furnace for graphitization production process, which comprises a furnace body and a furnace core, the inner wall of the furnace body is provided with a chute, the outer wall of the furnace core is provided with a slide rail, the outer wall of the slide rail is in sliding connection with the inner wall of the chute, the top end of the furnace core is provided with an accommodating groove, the inner wall of the accommodating groove is uniformly wound with a heating coil, and the heating coil is arranged in the accommodating groove. A frequency-variable motor is arranged at the bottom end of the furnace body, a feeding auger is fixed to the output end of the frequency-variable motor through bolts, a feeding pipe, an exhaust pipe and a gas supply pipeline are sequentially connected to the side wall of the furnace body from bottom to top in a penetrating mode, and a feeding port, an exhaust hole and a gas supply hole corresponding to the feeding pipe, the exhaust pipe and the gas supply pipeline in position are formed in the side wall of the furnace core. By arranging the furnace core, the furnace body, the sliding grooves and the sliding rails, the furnace core can be conveniently taken out to be replaced or cleaned, the structure is simple, and cleaning and maintaining are convenient; and through the arrangement of the feeding auger, the stirring rod and the heating coil, more uniform heating is achieved during feeding, and the graphitization effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production of negative electrode materials for lithium batteries, in particular to a special furnace for a graphitization production process. Background Art

[0002] After the graphite negative electrode materials are processed by air flow crushing, spheroidization, surface coating treatment, carbonization and other preliminary treatments to obtain semi-finished products with standard shape and particle size distribution, they need to be heat treated at a high temperature of more than 2800°C in a special graphitization furnace to achieve ideal electrochemical properties such as capacity, rate, and cycle performance. During the graphitization process, all containers are made of graphite. As the current rises from zero to hundreds of thousands of amperes in a short time, the temperature rises sharply, and the mechanical strength of the material is required to be extremely high. Most existing graphitization furnaces use cylindrical crucibles for electrical conduction, which mainly rely on the crucible contact points and resistor materials for electrical conduction. The resistance is large, the power transmission time is long, and the heat diffusion is serious, resulting in low heat utilization efficiency. Therefore, it is necessary to improve the existing graphitization furnace structure.

[0003] In the related art, for example, the Chinese patent with application number "201821667136.8", which is named "a graphitization furnace", includes a horizontally arranged furnace body, one side of the furnace body is provided with a feed port, the other side is provided with a discharge port, the furnace body has a furnace chamber inside, the furnace chamber includes a heating furnace chamber near the feed port and a heat preservation furnace chamber near the discharge port, the inner wall of the heating furnace chamber is provided with a heating electrode, a spiral feeding rod is provided inside the furnace chamber, the spiral feeding rod is connected to the variable frequency motor through a connecting shaft, and the furnace body is connected to the inert gas protection system through a pipeline. The utility model is evenly heated inside, avoids material accumulation, and has a good graphitization effect.

[0004] The above patent can avoid material accumulation, but because the furnace core and the furnace wall are integrated, after the furnace core is scrapped, the entire furnace body cannot be used, which wastes resources, and it is inconvenient to clean the inner wall of the furnace core, which affects the service life of the furnace body. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a special furnace for the graphitization production process. Through the furnace core, furnace body, slide groove and slide rail, when the furnace core is replaced or cleaned, the bolt is loosened and removed to contact the connection lock between the output end of the frequency-converter motor and the feeding auger, and the feeding auger is taken out, and the furnace core can be taken out for replacement or cleaning. The structure is simple and easy to clean and maintain; through the feeding auger, stirring rod and heating coil, when the feeding auger rotates to feed the material, the stirring rod is driven to rotate to break up and stir the material, and the material is heated more evenly with the evenly distributed heating coils to improve the graphitization effect.

[0006] One of the purposes of the utility model is achieved by adopting the following technical scheme: a special furnace for graphitization production process, comprising: a furnace body, a furnace core, the inner wall of the furnace body is provided with a slide groove, the outer wall of the furnace core is provided with a slide rail, the outer wall of the slide rail is slidably connected to the inner wall of the slide groove, the top of the furnace core is provided with a storage groove, the inner wall of the storage groove is evenly wound with a heating coil, the bottom end of the furnace body is provided with a frequency conversion motor, the output end of the frequency conversion motor is bolted with a feeding auger, the feeding auger passes through the furnace body and the bottom end of the furnace core is located in the furnace core, the side walls of the furnace body are sequentially connected with a feed pipe, an exhaust pipe, and an air supply pipe from bottom to top, and the side walls of the furnace core are provided with a feed port, an exhaust hole, and an air supply hole corresponding to the positions of the feed pipe, the exhaust pipe, and the air supply pipe. Through the provided furnace core, furnace body, slide groove and slide rail, when the furnace core is replaced or cleaned, the bolt is loosened and removed to contact the connection lock between the output end of the frequency-converting motor and the feeding auger, and the feeding auger is taken out, and the furnace core can be taken out for replacement or cleaning. The structure is simple and easy to clean and maintain; through the provided feeding auger, stirring rod and heating coil, when the feeding auger rotates to feed the material, the stirring rod is driven to rotate to disperse and stir the material, and the material is heated more evenly with the evenly distributed heating coil, thereby improving the graphitization effect.

[0007] According to the special furnace for graphitization production process, stirring rods are evenly fixed to the outer wall of the rotating rod of the feeding auger.

[0008] According to the special furnace for the graphitization production process, a feed valve plate is provided on the feed pipe.

[0009] A special furnace for the graphitization production process is provided, wherein one end of the outside of the gas supply pipeline is connected through an inert gas tank, and a valve is provided on the gas supply pipeline.

[0010] According to the special furnace for the graphitization production process, a discharge valve plate is provided above the furnace body.

[0011] According to the special furnace for the graphitization production process, the inner wall of the furnace body is provided with a heat-insulating layer.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 It is a three-dimensional diagram of a special furnace for graphitization production process of the utility model;

[0015] Figure 2This is a cross-sectional view of a special furnace for a graphitization production process of the utility model;

[0016] Figure 3 This is a three-dimensional diagram of a furnace body of a special furnace for a graphitization production process of the utility model;

[0017] Figure 4 The utility model is a furnace core structure diagram of a special furnace for a graphitization production process.

[0018] Legend:

[0019] 1. Furnace body; 2. Frequency conversion motor; 3. Feeding auger; 4. Furnace core; 5. Feed pipe; 6. Exhaust pipe; 7. Air supply pipe; 8. Inert gas tank; 9. Heating coil; 10. Discharge valve plate; 101. Slide; 301. Stirring stick; 401. Storage slot; 402. Feed port; 403. Exhaust hole; 404. Air supply hole; 405. Slide rail; 501. Feed valve plate; 701. Valve. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4The utility model embodiment is a special furnace for graphitization production process, which includes: a furnace body 1, a furnace core 4, a discharge valve plate 10 is arranged above the furnace body 1, the inner wall of the furnace body 1 is provided with a heat preservation layer, a slide groove 101 is opened on the inner wall of the furnace body 1, a slide rail 405 is arranged on the outer wall of the furnace core 4, and the outer wall of the slide rail 405 is slidably connected with the inner wall of the slide groove 101, a storage groove 401 is opened on the top of the furnace core 4, and a heating coil 9 is evenly wound on the inner wall of the storage groove 401, a frequency conversion motor 2 is arranged at the bottom end of the furnace body 1, and a feeding auger 3 is fixed to the output end of the frequency conversion motor 2 by bolts, and a feeding auger 3 is provided. The feeding auger 3 passes through the furnace body 1, and the bottom end of the furnace core 4 is located in the furnace core 4. The outer wall of the rotating rod of the feeding auger 3 is evenly fixed with a stirring rod 301. The side wall of the furnace body 1 is connected with a feed pipe 5, an exhaust pipe 6, and an air supply pipe 7 in sequence from bottom to top. A feed valve plate 501 is provided on the feed pipe 5. An inert gas tank 8 is connected to the outer end of the air supply pipe 7. A valve 701 is provided on the air supply pipe 7. The side wall of the furnace core 4 is provided with a feed port 402, an exhaust hole 403, and an air supply hole 404 corresponding to the positions of the feed pipe 5, the exhaust pipe 6, and the air supply pipe 7. By means of the furnace core 4, furnace body 1, slide groove 101 and slide rail 405, when the furnace core 4 is replaced or cleaned, the bolt is loosened and removed to contact the connection lock between the output end of the frequency conversion motor 2 and the feeding auger 3, and the feeding auger 3 is taken out. Then, the furnace core 4 is taken out for replacement or cleaning. When installing again, the slide rail 405 of the furnace core 4 can be slid into the slide groove 101 of the furnace body 1. At this time, the feed port 402 is connected with the feed pipe 5, the air supply hole 404 is connected with the air supply pipe 7, and the exhaust hole 403 is connected with the exhaust pipe 6, so as to ensure the normal operation of the furnace, the structure is simple, easy to clean and maintain, and the service life is improved; by means of the feeding auger 3, stirring rod 301 and heating coil 9, when the feeding auger 3 rotates to feed the material, the stirring rod 301 is driven to rotate to disperse and stir the material, and the evenly distributed heating coil 9 is cooperated to heat the material more evenly, thereby improving the graphitization effect.

[0022] Working principle: When in use, open the feed valve plate 501, the material enters the furnace core 4 through the feed pipe 5 and the feed port 402, the frequency-converting motor 2 drives the feed auger 3 to rotate and feed the material, driving the stirring rod 301 to rotate to break up and stir the material, and cooperate with the evenly distributed heating coil 9 to heat the material more evenly, and at the same time open the valve 701 to transport the inert gas in the inert gas tank 8 to the furnace core 4 for protection, and finally the material is transported to the discharge port;

[0023] When replacing or cleaning the furnace core 4, loosen and remove the bolt to contact the connection lock between the output end of the frequency conversion motor 2 and the feeding auger 3, take out the feeding auger 3, and then take out the furnace core 4 for replacement or cleaning. When installing again, slide the slide rail 405 of the furnace core 4 into the slide groove 101 of the furnace body 1. At this time, the feed port 402 is connected with the feed pipe 5, the air supply hole 404 is connected with the air supply pipeline 7, and the exhaust hole 403 is connected with the exhaust pipe 6, which ensures the normal operation of the furnace. The structure is simple, easy to clean and maintain, and the service life is increased.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A special furnace for graphitization production process, characterized in that: include: A furnace body (1) and a furnace core (4), wherein the inner wall of the furnace body (1) is provided with a slide groove (101), the outer wall of the furnace core (4) is provided with a slide rail (405), the outer wall of the slide rail (405) is slidably connected to the inner wall of the slide groove (101), the top of the furnace core (4) is provided with a storage groove (401), the inner wall of the storage groove (401) is evenly wound with a heating coil (9), the bottom end of the furnace body (1) is provided with a frequency conversion motor (2), the output of the frequency conversion motor (2) is A feeding auger (3) is fixed by bolts at the outlet end. The feeding auger (3) passes through the furnace body (1) and the furnace core (4), and the bottom end thereof is located in the furnace core (4). The side wall of the furnace body (1) is connected with a feeding pipe (5), an exhaust pipe (6), and an air supply pipe (7) in sequence from bottom to top. The side wall of the furnace core (4) is provided with a feeding port (402), an exhaust hole (403), and an air supply hole (404) corresponding to the positions of the feeding pipe (5), the exhaust pipe (6), and the air supply pipe (7).

2. A special furnace for graphitization production process according to claim 1, characterized in that: The outer wall of the rotating rod of the feeding auger (3) is evenly fixed with a stirring rod (301).

3. The special furnace for graphitization production process according to claim 1, characterized in that: The feed pipe (5) is provided with a feed valve plate (501).

4. The special furnace for graphitization production process according to claim 1, characterized in that: An inert gas tank (8) is connected through one end of the outside of the gas supply pipeline (7), and a valve (701) is provided on the gas supply pipeline (7).

5. The special furnace for graphitization production process according to claim 1, characterized in that: A discharge valve plate (10) is provided above the furnace body (1).

6. The special furnace for graphitization production process according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with a heat-insulating layer.

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