Long-term heat treatment of collector bars for aluminium electrolysis: impact on microstructure and electrical properties

Autor: Jonas Hankel, Sandra Kernebeck, Friederike Deuerler, Sebastian Weber
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: SN Applied Sciences, Vol 2, Iss 9, Pp 1-11 (2020)
Druh dokumentu: article
ISSN: 2523-3963
2523-3971
DOI: 10.1007/s42452-020-03391-w
Popis: Abstract In order to identify possible optimizations regarding the electrical energy efficiency of an aluminium electrolysis cell, the impact of service temperature on microstructure and electrical properties of the cell cathode was investigated. The investigations include experiments regarding the chemical composition, especially the content of carbon, the electrical conductivity and the microstructure at selected positions. Thermodynamic calculations were used to estimate local service temperatures and explain phase transformations and formations. It was found that due to the increased service temperature diffusion processes of carbon took place to a particular extent between cast iron and collector bar. As a result, the carbon content in the collector bar changed from 0.06 to 1.05–1.4 wt%, while in the cast iron a reduction from 3.47 to
Databáze: Directory of Open Access Journals
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