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铝电解 Effect of calcination temperature on microstructure evolution of calcined petroleum cokeYOU Zihan, XIAO Jin, YU Pusheng, ZHOU Yu, GAN Xiaoshuang, ZHONG Qifan
Calcined petroleum coke is an important raw material of metallurgical carbon materials such as carbon anode for aluminum electrolysis. The existing research lac...
铝电解 Anodic dissolution of aluminum in acidic AlCl₃-EMIC and AlCl₃-BMIC ionic liquidsYANG Xiaoqing, ZHENG Yong, WANG Qian, LI Yu, LI Tao, REN Baozeng
The ionic liquids formed by 1-ethyl-3-methylimidazole chloride (EMIC) and 1-butyl-3-methylimidazole chloride (BMIC) with aluminum chloride (AlCl₃) ar...

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铝电解

Effect of calcination temperature on microstructure evolution of calcined petroleum coke
YOU Zihan, XIAO Jin, YU Pusheng, ZHOU Yu, GAN Xiaoshuang, ZHONG Qifan

2024,53(1):8-16, DOI: 10.19612/j.cnki.cn11-5066/tf.2024.01.002

Abstract(22) HTML(0) PDF(6.69 M)( 129) Collect

Abstract:

Calcined petroleum coke is an important raw material of metallurgical carbon materials such as carbon anode for aluminum electrolysis. The existing research lacks of in-depth exploration of the microstructure evolution of calcined coke at different calcination temperatures, which makes it difficult to intelligently control and reduce the consumption of metallurgical carbon production. In order to solve the above problems, an intelligent extraction technology of lattice fringes of carbon materials based on HRTEM detection and mathematical fitting were used to investigate the evolution law of the microstructure of calcined coke at different calcination temperatures. When the temperature was below 600℃, the average lattice fringe length, total stacking frequency, and 45° contribution of the calcined cokes slightly deteriorated with the increase of temperature. While in the temperature range of 600 to 1600℃, the variation patterns of the characteristic values were consistent with the Sigmoid function model, which increased rapidly and then gently with the increase of temperature. The effective temperature intervals of the microstructure characteristics were obtained via the deduced formula of the fitting curves. The priority of the microstructure characteristics changing with temperature was as follows: lattice orientation ＞ lattice stacking ＞ lattice growth. The graphitization degree R of calcined coke varied from 0.86 to 0.59 in the temperature range of 25~1600℃ by Raman spectrum analysis. The evolution law of graphitization degree at different temperatures demonstrated the result of the variation patterns analysis of the above microstructure characteristics.

Anodic dissolution of aluminum in acidic AlCl₃-EMIC and AlCl₃-BMIC ionic liquids
YANG Xiaoqing, ZHENG Yong, WANG Qian, LI Yu, LI Tao, REN Baozeng

2024,53(1):1-7, DOI: 10.19612/j.cnki.cn11-5066/tf.2024.01.001

Abstract(32) HTML(0) PDF(4.59 M)( 321) Collect

Abstract:

The ionic liquids formed by 1-ethyl-3-methylimidazole chloride (EMIC) and 1-butyl-3-methylimidazole chloride (BMIC) with aluminum chloride (AlCl₃) are the most promising ionic liquids for electrolytic aluminum. In this paper, linear voltammetry, chronoamperometry, chronopotentiometry, constant-voltage electrolysis, constant-current electrolysis and other electrochemical experiments are used to compare the anodic dissolution of aluminum in acidic AlCl₃-EMIC and AlCl₃-BMIC ionic liquids under stirring and non-stirring conditions, in order to screen out a better electrolyte system. The effects of stirring, temperature, current density, potential and other process parameters on the electrolytic process are investigated to provide basic data for industrial scale-up.

About

Governing Body：中国有色金属工业协会

Organizer：中国有色工程有限公司

CN：11-5066/TF

ISSN：1672-6103

Publish Date：1972年

Publishing Cycle：双月刊

Address：北京海淀区复兴路12号

Zip Code：100038

Phone：010-63936594

Email：zgysyj@sohu.com

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