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Method and special plant for producing graphitized carbon fiber

A graphitized carbon fiber and generator technology, applied in fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of high energy consumption, low thermal efficiency, expensive equipment cost, etc., achieve low energy consumption, low product cost, and guarantee comprehensive performance Effect

Inactive Publication Date: 2004-10-06
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This graphitization method is not only expensive, but also consumes a lot of energy and has low thermal efficiency.

Method used

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  • Method and special plant for producing graphitized carbon fiber
  • Method and special plant for producing graphitized carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] As shown in the figure, the cathode 4 and the anode 3 are connected by an insulating flange 7, the cooling water pipe inlet 2 is connected to the anode 3 by welding, the anode 3 and the reaction furnace 1 are connected by a flange 8, and the argon gas inlet pipe 5 is connected to the cathode 4 connected. The cooling water is introduced from the inlet 2 of the cooling water pipe, and the argon gas is introduced through the argon gas inlet pipe 5, and a direct current of 80A is applied to the cathode 4 and the anode 3 at the same time at a pressure of 0.3 MPa, so that the gas is continuously discharged and an arc is formed. Pass through carbon fiber from reaction furnace 1, control the residence time of carbon fiber in the furnace to be 20 seconds. After the reaction, the tensile modulus was tested, and the results are listed in Table 1.

Embodiment 2

[0014] Adjust the current to 90A, and the pressure in the reactor to 0.4MPa. Control the residence time of carbon fiber in the furnace to be 15 seconds. Others are carried out by the same method and conditions as in Example 1, and the tensile modulus is tested after the reaction, and these results are listed in Table 1.

Embodiment 3

[0016] Adjust the current to 100A, and the pressure in the reaction furnace to 0.5MPa. Control the residence time of carbon fiber in the furnace to be 10 seconds. Others are carried out by the same method and conditions as in Example 1, and the tensile modulus is tested after the reaction, and these results are listed in Table 1.

[0017] condition, result / case number

[0018] It can be seen from the above table that the tensile modulus of the manufactured graphite fiber has reached the level of M40J (377GPa) by adopting the above-mentioned embodiment.

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Abstract

In the present invention, cooling water and Ar as working medium are first introduced into the plasma generator; and under pressure of 0.3-0.5 MPa and current of 80-100 A, the plasma generator produces local high temperature of 2500-3500 deg.c. Carbon fiber is made to pass through the high temperature area with the stay time being 10-20 sec, so as to obtain graphitized carbon fiber. It has simple technological process, low cost, and low power consumption and the plasma can be heated and cooled instantaneously and this results in high comprehensive material performance and environment friendly technological process.

Description

Technical field: [0001] The invention belongs to a method for producing graphitized carbon fiber, and in particular relates to a production method and a special device for graphitizing carbon fiber in an oxygen-free environment by utilizing the characteristics of high temperature and high reactivity of thermal plasma. Background technique: [0002] As soon as carbon fiber came out, it was favored for its unique high strength, high modulus, ablation resistance, weavable, conductive and other excellent properties, and became a dazzling star in the material world. High modulus carbon (graphite) fiber is an important species in the carbon fiber family. It is the most important reinforcing material for advanced composite materials and has a wide range of uses in national defense construction and national economic construction. The carbon fiber is heated at 2000-3000°C under the condition of traction, so that the orientation degree of graphite crystallites in the fiber increases a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12
Inventor 王浩静刘颖周立公晁兵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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