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Preparation method of non-graphitized conductive carbon anode material

An anode material, non-graphitization technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of reduced conductivity of carbon anode, decrease of fluorine production efficiency, difficulty in solving polarization resistance and conductivity, etc., to improve conductivity performance effect

Inactive Publication Date: 2011-05-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the positive correlation between the electrical conductivity of carbon materials and the degree of graphitization, non-graphitization will lead to a significant reduction in the electrical conductivity of carbon anodes, and a significant drop in the efficiency of fluorine production.
Therefore, it is difficult to solve the contradiction between anti-polarization and electrical conductivity by purely adopting non-graphitization methods, and it is urgent to develop new non-graphitization conductive carbon anode materials.

Method used

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  • Preparation method of non-graphitized conductive carbon anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 (1) According to the weight percentage of raw materials: needle coke 61%, conductive carbon black 10%, medium temperature coal tar pitch 29%, prepare carbon anode raw materials, the softening point of medium temperature coal tar pitch is 83 ℃, coking value is 51.1%, quinoline Insoluble matter content is 3.3%, and the average particle diameter of needle coke powder and conductive carbon black powder is 220 microns and 8 microns respectively, and after raw material is through dry mixing, the average particle diameter of mixed powder is 98 microns; (2) acicular coke powder After coke and conductive carbon black are dry mixed evenly, add medium-temperature coal tar pitch and knead, and control the kneading temperature to 150°C; (3) Use warm compression molding method to press into blanks, control the pressing temperature to 110°C, and the green body density to 1.6g / cm 3 (4) Carry out pressurized carbonization to the green body, control the carbonization tempera...

Embodiment 2

[0027] see figure 1 (1) According to the weight percentage of raw materials: needle coke 63%, conductive carbon black 10%, medium temperature coal tar pitch 27%, prepare carbon anode raw materials, the softening point of medium temperature coal tar pitch is 83 ° C, the coking value is 51.1%, quinoline Insoluble matter content is 3.3%, and the average particle diameter of needle coke powder and conductive carbon black powder is 220 microns and 8 microns respectively, and after raw material is through dry mixing, the average particle diameter of mixed powder is 98 microns; (2) acicular coke powder After coke and conductive carbon black are dry mixed evenly, add medium-temperature coal tar pitch and knead, and control the kneading temperature to 180°C; (3) Use warm compression molding method to press into blanks, control the pressing temperature to 130°C, and the green body density to 1.56g / cm 3 (4) Carry out pressurized carbonization on the green body, control the carbonization ...

Embodiment 3

[0029] see figure 1 (1) According to the weight percentage of raw materials: needle coke 67%, conductive carbon black 8%, medium temperature coal tar pitch 25%, prepare carbon anode raw materials, the softening point of medium temperature coal tar pitch is 83 ° C, the coking value is 51.1%, quinoline Insoluble matter content is 3.3%, and the average particle diameter of needle coke powder and conductive carbon black powder is 220 microns and 8 microns respectively, and after raw material is through dry mixing, the average particle diameter of mixed powder is 98 microns; (2) acicular coke powder After coke and conductive carbon black are dry mixed evenly, add medium-temperature coal tar pitch and knead, and control the kneading temperature to 160°C; (3) Use warm compression molding method to press into blanks, control the pressing temperature to 120°C, and the green body density to 1.6g / cm 3 (4) Carry out pressurized carbonization to the green body, control the carbonization te...

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Abstract

The invention discloses a preparation method of a non-graphitized conductive carbon anode material, comprising the following steps of: (1) preparing carbon anode the following raw materials in percentage by weight: 60%-80% of needlelike coke, 1%-10% of conductive carbon black and 20%-30% of mesothermal coal pitch; (2) dryly and uniformly mixing the needlelike coke with the conductive carbon black, then adding the mesothermal coal pitch for kneading, and controlling the kneading temperature to be between 150 DEG C and 200 DEG C; (3) pressing into a blank by a warm-pressing mould-pressing method, and controlling pressing temperature to be between 110 DEG C and 150 DEG C and blank density between 1.56 g / cm3 and 1.64 g / cm3; (4) pressurizing and carbonizing the blank, and controlling carbonizing temperature to be between 800 DEG C and 950 DEG C and carbonizing pressure between 8 MPa and 10 MPa; (5) infusing pitch to the blank / carbonizing and densifying the blank, and controlling infusing temperature to be between 160 DEG C and 200 DEG C and infusing pressure to be between 8 MPa and 12 MPa; conducting a carbonizing process which is the same as the step (4), and circularly carbonizing till the blank density is 1.75 g / cm3-1.85 g / cm3 so that the non-graphitized conductive carbon anode material is obtained. The invention enhances the electric conductivity of the non-graphitized conductive carbon anode material.

Description

technical field [0001] The invention relates to a preparation method of a carbon anode material, in particular to a preparation method of a non-graphitized conductive carbon anode material. Background technique [0002] In the process of electrolytic fluorine production, fluorine gas overflows on the anode. Since fluorine is the most active chemical element and is extremely chemically corrosive, it is necessary to use materials resistant to fluorine gas corrosion to prepare the electrolytic fluorine anode. Carbon anode material is a carbon material composed of amorphous carbon. It has the characteristics of low graphitization degree, low resistivity, corrosion resistance, especially corrosion resistance of fluorine gas, etc. It is the necessary material for industrial electrolytic fluorine anode. Performance determines the efficiency of electrolytic fluorine production. [0003] However, at present, my country's carbon anode materials have polarization defects, resulting in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/12
Inventor 张福勤于澍夏莉红梁世栋袁铁锤
Owner CENT SOUTH UNIV