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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 4    August 2006

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Results from 100 h electrolysis testing of NiFe2O4 based cermet as inert anode in aluminum reduction
LAI Yan-qing(赖延清), TIAN Zhong-liang(田忠良),
LI Jie(李 劼), YE Shao-long(叶绍龙), LI Xin-zheng(李新征), LIU Ye-xiang(刘业翔)

School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China

Abstract: A 100 mm diameter cup-shaped inert anode for aluminum electrolysis consisting of cermet 17Ni/83(10NiO-90NiFe2O4) was prepared and the operating performance was evaluated in a laboratory cell with the electrolyte CR2.3 and Al2O3 concentration 7.43% (mass fraction). The results indicate that no major operational difficulties are encountered during the testing which lasts for 101.5 h and the inert anode exhibits good general performances. The steady-state average concentration of impurity Ni in the bath is close to the solubility, however, the Fe concentration is lower than its solubility. The contents of the main contaminants for aluminum produced are Ni 0.128 8%, Fe 1.007 4%. The corrosion rate of inert anode under electrolysis conditions based on the content of impurity Ni in metal aluminum is approximately 8.51 mm/a.

 

Key words: aluminum electrolysis; inert anode; cermet; NiFe2O4

ISSN 1672-7029
CN 43-1423/U

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