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Ultrahigh-power graphite electrode and preparation method thereof

A graphite electrode and power technology, which is applied in the field of ultra-high power graphite electrode and its preparation, can solve the problems of unsatisfactory mechanical properties and electrical properties, complex processing technology of graphite electrodes, etc., and achieve improved anti-oxidation performance and excellent thermal oxidation resistance Performance and service life extension effect

Active Publication Date: 2021-12-03
上海仁朋实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of iron and steel enterprises, electric arc furnaces with larger capacity, higher current and voltage have been widely used, so they put forward higher requirements for the performance of graphite electrodes, and the processing technology of graphite electrodes on the market today is complex, and The mechanical and electrical properties still cannot meet our needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of an ultra-high power graphite electrode, comprising the following steps:

[0043] (1) Take triethylenetetramine, concentrated sulfuric acid and fluoboric acid, mix and stir for 10 minutes, then place them in an ice-water bath (-5°C) and stir for 6 hours to react, extract and purify to obtain a polyamino ionic liquid; the triethylenetetramine , The molar ratio of concentrated sulfuric acid and fluoboric acid is 1:1:1.

[0044] (2) Take concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, mix them evenly, add carbon nanotubes, ultrasonically disperse for 1 hour, stir and react at 60°C for 3 hours, filter and wash until neutral, and dry in vacuum to obtain carboxylated carbon nanotube;

[0045] Take carboxylated carbon nanotubes, polyamino ionic liquid and N,N-dimethylformamide, mix and stir for 20 minutes, add dicyclohexylcarbodiimide and 4-dimethylaminopyridine, ultrasonically disperse for 10 minutes, and then Stirr...

Embodiment 2

[0052] A preparation method of an ultra-high power graphite electrode, comprising the following steps:

[0053] (1) Take triethylenetetramine, concentrated sulfuric acid and fluoroboric acid, mix and stir for 15 minutes, then put them in an ice-water bath (-5°C) and stir for 6.5 hours, and purify after extraction to obtain a polyamino ionic liquid; the triethylenetetramine The molar ratio of amine, concentrated sulfuric acid and fluoboric acid is 1:1:1.

[0054] (2) Take concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, mix them evenly, add carbon nanotubes, ultrasonically disperse for 1.5 hours, stir and react at 62°C for 2.5 hours, filter and wash until neutral, and dry in vacuum to obtain carboxyl carbon nanotubes;

[0055] Take carboxylated carbon nanotubes, polyamino ionic liquid and N,N-dimethylformamide, mix and stir for 25 minutes, add dicyclohexylcarbodiimide and 4-dimethylaminopyridine, ultrasonically disperse for 12 minutes, and th...

Embodiment 3

[0062] A preparation method of an ultra-high power graphite electrode, comprising the following steps:

[0063] (1) Take triethylenetetramine, concentrated sulfuric acid and fluoboric acid, mix and stir for 20 minutes, then place them in an ice-water bath (-5°C) and stir for 7 hours to react, extract and purify to obtain a polyamino ionic liquid; the triethylenetetramine , The molar ratio of concentrated sulfuric acid and fluoboric acid is 1:1:1.

[0064] (2) Take concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, mix them evenly, add carbon nanotubes, ultrasonically disperse for 2 hours, stir and react at 65°C for 2 hours, filter and wash until neutral, and dry in vacuum to obtain carboxylated carbon nanotube;

[0065] Take carboxylated carbon nanotubes, polyamino ionic liquid and N,N-dimethylformamide, mix and stir for 30 minutes, add dicyclohexylcarbodiimide and 4-dimethylaminopyridine, ultrasonically disperse for 15 minutes, and then Stir...

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Abstract

The invention discloses an ultrahigh-power graphite electrode and a preparation method thereof, wherein needle coke, ultrahigh-power graphite electrode roasting scraps, ultrahigh-power graphite electrode graphite scraps, carbon fibers, silicon dioxide, a rare earth material, modified coal pitch and other components are compounded, so that the oxidation resistance and the mechanical property of the graphite electrode are improved; the service life of the electrode is prolonged, and the comprehensive performance of the graphite electrode is ensured. According to the ultrahigh-power graphite electrode and the preparation method thereof, the process design is reasonable, the component proportion is proper, and the prepared graphite electrode has excellent thermal oxidation resistance and crack resistance, excellent mechanical properties, reduced electrical resistivity, excellent electrical properties and relatively high practicability.

Description

technical field [0001] The invention relates to the technical field of graphite electrodes, in particular to an ultra-high-power graphite electrode and a preparation method thereof. Background technique [0002] Graphite electrode refers to petroleum coke, pitch coke as aggregate, coal tar pitch as binder, a kind of resistant electrode made by calcination of raw materials, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. High temperature graphite conductive material is called artificial graphite electrode (referred to as graphite electrode), which can be divided into ordinary power graphite electrode, high power graphite electrode and ultra-high power graphite electrode according to the quality index. [0003] With the development of iron and steel enterprises, electric arc furnaces with larger capacity, higher current and voltage have been widely used, so they put forward higher requirements for the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/52C04B35/532C04B35/622H05B7/085C04B35/63C04B35/632C04B35/634C04B41/85
CPCC04B35/80C04B35/522C04B35/532C04B35/622H05B7/085C04B35/632C04B35/6303C04B35/63432C04B35/63444C04B41/85C04B41/5015C04B2235/422C04B2235/5248C04B2235/3418C04B2235/9684C04B2235/96C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B41/5006C04B41/50C04B41/4535
Inventor 占庆怀汪锡华
Owner 上海仁朋实业有限公司
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