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Preparation method of high-conductivity graphite electrode
The invention discloses a preparation method of a high-conductivity graphite electrode, which comprises the following steps of: forming a three-layer core-shell structure by taking delayed petroleum coke as a main raw material, conductive carbon black and boron carbide as a first-layer coating agent and spinning pitch as a second-layer coating agent, and modifying the material and changing the microstructure of the material by adopting a briquetting and granulating process to obtain the high-conductivity graphite electrode. The density, the homogeneity, the conductivity and the oxidation resistance of the material are improved. Further, the synthesis molding density and the current density of the graphite electrode can be improved, the conductivity and the oxidation resistance are improved, the energy consumption is reduced, the service life is prolonged, the crack resistance is good, and particularly, the replacement frequency of medium and large graphite electrodes is reduced. The volume density of the prepared graphite electrode blank is smaller than 1.78 g/cm < 3 >, the resistivity is smaller than 4.2 mu omega.m, the method is suitable for graphite electrodes of various specifications and models, and the problems that in the prior art, the conductivity and the service life of the graphite electrode are limited by raw material characteristics, and indexes are difficult to improve are solved.
本发明公开了一种高导电性石墨电极的制备方法，采用延迟石油焦作为主要原料，导电炭黑和碳化硼作为第一层包覆剂，采用纺丝沥青作为第二层包覆剂，形成三层核壳结构，然后采用压块造粒的工序，对材料进行改性，改变材料的微观结构，提高材料密度、均质性、导电性和抗氧化性。进而可以提高石墨电极的合成成型密度和电流密度，提高导电性和抗氧化性，降低能耗，并延长使用寿命，抗裂性好，特别是减少了中大型石墨电极的更换次数。制备的石墨电极坯的体积密度＜1.78g/cm3，电阻率＜4.2μΩ·m，适用于各种规格型号的石墨电极，解决了现有技术石墨电极导电性和使用寿命受到原料特性限制，指标难以提高的问题。
Preparation method of high-conductivity graphite electrode
The invention discloses a preparation method of a high-conductivity graphite electrode, which comprises the following steps of: forming a three-layer core-shell structure by taking delayed petroleum coke as a main raw material, conductive carbon black and boron carbide as a first-layer coating agent and spinning pitch as a second-layer coating agent, and modifying the material and changing the microstructure of the material by adopting a briquetting and granulating process to obtain the high-conductivity graphite electrode. The density, the homogeneity, the conductivity and the oxidation resistance of the material are improved. Further, the synthesis molding density and the current density of the graphite electrode can be improved, the conductivity and the oxidation resistance are improved, the energy consumption is reduced, the service life is prolonged, the crack resistance is good, and particularly, the replacement frequency of medium and large graphite electrodes is reduced. The volume density of the prepared graphite electrode blank is smaller than 1.78 g/cm < 3 >, the resistivity is smaller than 4.2 mu omega.m, the method is suitable for graphite electrodes of various specifications and models, and the problems that in the prior art, the conductivity and the service life of the graphite electrode are limited by raw material characteristics, and indexes are difficult to improve are solved.
本发明公开了一种高导电性石墨电极的制备方法，采用延迟石油焦作为主要原料，导电炭黑和碳化硼作为第一层包覆剂，采用纺丝沥青作为第二层包覆剂，形成三层核壳结构，然后采用压块造粒的工序，对材料进行改性，改变材料的微观结构，提高材料密度、均质性、导电性和抗氧化性。进而可以提高石墨电极的合成成型密度和电流密度，提高导电性和抗氧化性，降低能耗，并延长使用寿命，抗裂性好，特别是减少了中大型石墨电极的更换次数。制备的石墨电极坯的体积密度＜1.78g/cm3，电阻率＜4.2μΩ·m，适用于各种规格型号的石墨电极，解决了现有技术石墨电极导电性和使用寿命受到原料特性限制，指标难以提高的问题。
Preparation method of high-conductivity graphite electrode
一种高导电性石墨电极的制备方法
HE BINGQIANG (author) / HE JIANFENG (author) / DAI HUMIN (author) / BAO DEJUN (author) / LIU XIANLONG (author) / LI YICHENG (author) / HE JIANSHENG (author) / WU JIANYU (author) / CHEN HANCHU (author) / ZHONG YICHENG (author)
2023-07-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
F27D
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