CN219279503U

CN219279503U - Continuous high-temperature carbonization and graphitization process device for carbon

Info

Publication number: CN219279503U
Application number: CN202320503059.7U
Authority: CN
Inventors: 孟祥安; 赵延锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-30
Anticipated expiration: 2033-03-15

Abstract

The utility model relates to a continuous high-temperature carbonization and graphitization device for carbon, which comprises a carbonization rotary kiln and a graphitization furnace, wherein an outlet of the carbonization rotary kiln is connected with an inlet of the graphitization furnace through a telescopic connecting structure, the graphitization furnace is arranged from the inlet to the outlet in a downward inclined manner, the inclination angle of the graphitization furnace can be adjusted, the graphitization furnace comprises a charging area, a preheating area, a heating area, a soaking area and a cooling area from the inlet to the outlet in sequence, the heating area and the soaking area are graphite pipes heated by electrodes, and a pusher is arranged at the end part of the charging area. The utility model combines two furnace types to realize continuous production, and forms a process device combination for continuous high-temperature carbonization and graphitization of carbon.

Description

Continuous high-temperature carbonization and graphitization process device for carbon

Technical Field

The utility model relates to the technical field of lithium ion battery cathode material production, in particular to a carbon continuous high-temperature carbonization and graphitization process device.

Background

The existing carbon high-temperature carbonization (1250 ℃) process and graphitization (2800 ℃) process are basically two independent production devices, and a periodic production process is adopted. The following disadvantages are mainly involved: 1) Limited by the heat resistance of the furnace lining material; 2) Limited by the temperature of use of the heating element; 3) The periodic high-temperature carbonization and graphitization device cannot realize continuous production, so that high energy consumption and high consumption are caused.

In view of the above technical drawbacks, the present utility model aims to develop a process production apparatus capable of continuous production and reduced energy consumption, which is used for overcoming the above drawbacks.

Disclosure of Invention

The utility model provides a continuous high-temperature carbonization and graphitization process device for carbon, which is combined together in a mode of combining two furnace types to realize continuous production, so as to form a process device combination for continuous high-temperature carbonization and graphitization of carbon.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a continuous high temperature carbomorphism of carbon, graphitization process unit, includes carbomorphism rotary kiln, graphitization stove, the export of carbomorphism rotary kiln is through telescopic connection structure and graphitization stove entry linkage, graphitization stove is the downward sloping setting from the entry to the export, inclination can be adjusted, graphitization stove includes and is charge district, preheating zone, zone of heating, equalizing zone, cooling zone from the entry to the export in proper order, zone of heating and equalizing zone are the graphite pipe through electrode heating, the tip of charge district is equipped with the pusher.

The front end of the heating area is provided with a low-temperature section exhaust port, and the front end of the soaking area is provided with a high-temperature section exhaust port.

The cooling zone is in proper order air cooling slow cooling zone, water-cooling fast cooling zone, the air cooling slow cooling zone outside is equipped with the forced air cooling passageway for circulation lets in nitrogen gas or inert gas, the water-cooling fast cooling zone outside is equipped with the cooling water passageway, is used for circulation to let in the cooling water.

And the outlet of the carbonization rotary kiln is connected with the inlet of the graphitizing furnace through a telescopic corrugated pipe.

The inlet end of the graphitizing furnace is driven to lift by a hydraulic cylinder, so that the inclination angle B can be adjusted to 20+/-5 degrees.

Compared with the prior art, the utility model has the beneficial effects that:

1) The two furnace types are combined together to realize continuous production, so that a process device combination for continuous high-temperature carbonization and graphitization of carbon is formed, the energy consumption is reduced, and low pollution, high yield and high quality are realized.

2) According to the utility model, the graphitizing furnace is inclined by 20+/-5 degrees, the angle is adjustable, the furnace is not fully filled with materials all the time, so that gaps exist at the upper part of the furnace all the time, the exhaust port is arranged on the heating zone, volatile matters in the low-temperature zone can be discharged, the exhaust port is arranged on the furnace wall of the soaking zone, and gasified impurities in the high-temperature zone can be discharged out of the furnace, so that the phenomena of enrichment and condensation of volatile matters and gasified impurities on the surface of the materials, unsmooth exhaust and even furnace spraying accidents can be prevented.

3) The high-temperature carbonization or graphitization process is performed in a graphitization furnace, and the graphite pipe for heating the material is used as a high-temperature lining and an electric heating body, can heat and bear the temperature of 3000 ℃, realizes high-temperature carbonization or graphitization of the material, and solves the problems of limited heat resistance of the lining material of the furnace and limited use temperature of heating components.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

In the figure: 1. the rotary kiln charging system comprises a rotary kiln charging system 2, a charging sealing end 3, a driving and supporting system 4, a rotary kiln body 5, a discharging sealing end 6, a rotary kiln discharging system 7, a pusher 8, a charging zone fire-resistant furnace tube 9, a preheating zone fire-resistant furnace tube 10, a heating zone graphite tube 11, a soaking zone graphite tube 12, a cooling first zone 13, a cooling second zone 14, a low-temperature section exhaust pipe 15, a power supply positive electrode 16, a high-temperature section exhaust pipe 17, a power supply negative electrode 18, a high-temperature kiln discharging system 19, a lifting device 20, an air cooling channel 21, a cooling water channel 22 and a corrugated pipe.

Detailed Description

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

the device comprises a carbonization rotary kiln and a graphitization furnace, wherein an outlet of the carbonization rotary kiln is connected with an inlet of the graphitization furnace through a telescopic connecting structure, the graphitization furnace is arranged from the inlet to the outlet in a downward inclined manner, the inclination angle of the graphitization furnace can be adjusted, the graphitization furnace comprises a charging area, a preheating area, a heating area, a soaking area and a cooling area from the inlet to the outlet in sequence, the heating area and the soaking area are graphite pipes heated by electrodes, and a pusher 7 is arranged at the end part of the charging area.

The front end of the heating zone is provided with a low-temperature section exhaust port 14, and the front end of the soaking zone is provided with a high-temperature section exhaust port 16.

The cooling zone is an air cooling slow cooling zone (cooling first zone 12) and a water cooling fast cooling zone (cooling second zone 13) in sequence, an air cooling channel 20 is arranged outside the air cooling slow cooling zone and used for circularly introducing nitrogen or inert gas, and a cooling water channel 21 is arranged outside the water cooling fast cooling zone and used for circularly introducing cooling water.

The outlet of the carbonization rotary kiln is connected with the inlet of the graphitization furnace through a telescopic corrugated pipe 22.

Description of specific working process:

carbon materials are fed into the carbonization rotary kiln through the rotary kiln charging system 1, the materials complete heating tasks in the rotary kiln body 4, and the rotary kiln body adopts electric heating indirect heating to heat the materials to the target temperature. The carbonization rotary kiln rotates through the variable frequency speed regulation of the driving and supporting system 3, the cylinder body of the carbonization rotary kiln forms a certain included angle A (1.5-3.5 degrees) with the horizontal, the materials gradually move to the discharging sealing end 5 under the combined pushing of the inclination angle acting force and the variable frequency speed regulation rotation, and the carbon after the pre-carbonization is sent into the graphitization furnace through the rotary kiln discharging system 6 under the control of the air locking device by the gravity.

The whole furnace body of the graphitizing furnace is arranged at a certain inclined angle with the horizontal plane, the feeding end is connected with the carbonization rotary kiln (high end), the high end is provided with a lifting device 19 (hydraulic cylinder) for adjusting the inclined angle, the inclined angle B is adjustable within the range of 15-25 degrees according to the yield of the passing materials and the repose angle of the materials, and the materials can continuously move in the furnace under the dual actions of gravity and the pusher 7. The heating of carbon is performed by means of direct current applied by a heating area graphite tube 10 and a heat transfer area graphite tube 11 in a high-temperature furnace, wherein two ends of the heating area graphite tube 10 and the heat transfer area graphite tube 11 are powered by a positive electrode 15 and a negative electrode 17, the heating area graphite tube 10 and the heat transfer area graphite tube 11 generate heat by self, and the graphite tube can withstand high temperature of 3000 ℃ under the condition of isolating air, so that continuous high-temperature carbonization can be completed, and continuous graphitization can be realized. The materials which are carbonized and graphitized at high temperature through the heating area and the soaking area enter a cooling first area 12 for slow cooling, and the materials are cooled to: high-temperature carbonization is carried out at 1000 ℃ and graphitization is carried out at 1500 ℃, then the material enters a cooling second zone 13 for rapid cooling, the material is cooled to be less than 100 ℃, and finally the material is discharged out of the furnace through a high-temperature kiln discharging system 18, thus completing the whole technological treatment process.

Example 1: high-temperature carbonization process

The carbonization rotary kiln adopts an indirect heating metal rotary kiln, carbon is heated to 850-1000 ℃ in the kiln, the carbon is sent into a graphitization furnace with a certain inclination angle with the horizontal through a discharging system under the rotary kiln, a graphite pipe is arranged in the graphitization furnace, insulating and heat-insulating materials are externally lined, two ends of the graphite pipe are respectively provided with a power supply anode and a power supply cathode, the graphite pipe is used as a high-temperature lining and an electric heating body, materials needing high-temperature carbonization are heated to 1250-1350 ℃ by self heating, carbonization of the materials is realized, and then the materials are cooled to <100 ℃ through a first cooling zone 12 (slow cooling zone) and a second cooling zone 13 (fast cooling zone), so that the processing technology is completed.

Example 2: graphitization process

The carbonization rotary kiln adopts an indirect heating metal rotary kiln, carbon is heated to 850-1000 ℃ in the kiln, the carbon is sent into a graphitization furnace with a certain inclination angle with the horizontal through a discharging system under the rotary kiln, a graphite pipe is arranged in the graphitization furnace, insulating and heat-insulating materials are externally lined, two ends of the graphite pipe are respectively provided with a power supply anode and a power supply cathode, the graphite pipe is used as a lining and also as an electric heating body, the material to be graphitized is heated to 2800-3000 ℃ by self-heating to realize graphitization, and then the material is cooled to <100 ℃ through a first cooling zone 12 (slow cooling zone) and a second cooling zone 13 (fast cooling zone), so that the processing technology process is completed.

Claims

1. The utility model provides a continuous high temperature carbomorphism of carbon, graphitization process unit, its characterized in that includes carbomorphism rotary kiln, graphitization stove, the export of carbomorphism rotary kiln is through scalable connection structure and graphitization stove entry linkage, graphitization stove is the downward sloping setting from the entry to the export, inclination can be adjusted, graphitization stove includes and is charge district, preheating zone, soaking zone, cooling zone from the entry to the export in proper order, heating zone and soaking zone are the graphite pipe through electrode heating, the tip of charge district is equipped with the pusher.

2. The continuous high-temperature carbonization and graphitization device for carbon according to claim 1, wherein the front end of the heating zone is provided with a low-temperature section exhaust port, and the front end of the soaking zone is provided with a high-temperature section exhaust port.

3. The continuous high-temperature carbonization and graphitization process device for carbon according to claim 1, wherein the cooling zone is an air cooling slow cooling zone and a water cooling fast cooling zone in sequence, an air cooling channel is arranged outside the air cooling slow cooling zone and is used for circularly introducing nitrogen or inert gas, and a cooling water channel is arranged outside the water cooling fast cooling zone and is used for circularly introducing cooling water.

4. The continuous high-temperature carbonization and graphitization device for carbon according to claim 1, wherein the outlet of the carbonization rotary kiln is connected with the inlet of the graphitization furnace through a telescopic corrugated pipe.

5. The continuous high-temperature carbonization and graphitization device for carbon according to claim 1, wherein the inlet end of the graphitization furnace is driven to lift by a hydraulic cylinder, so that the inclination angle B can be adjusted to 20±5°.