Aluminate spinels as sidewall linings for aluminum smelters

Yan, X. Y., Mukhlis, R. Z., Rhamdhani, M. A. and Grooks, G. A. (2011). Aluminate spinels as sidewall linings for aluminum smelters. In: Stephen J. Lindsay, Light Metals 2011: Proceedings of the technical sessions presented by the TMS Aluminum Committee at the TMS 2011 Annual Meeting and Exhibition. TMS 2011 140th Annual Meeting and Exposition, San Diego, CA, United States, (1085-1090). 27 February - 3 March 2011. doi:10.1002/9781118061992.ch184

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Author Yan, X. Y.
Mukhlis, R. Z.
Rhamdhani, M. A.
Grooks, G. A.
Title of paper Aluminate spinels as sidewall linings for aluminum smelters
Conference name TMS 2011 140th Annual Meeting and Exposition
Conference location San Diego, CA, United States
Conference dates 27 February - 3 March 2011
Proceedings title Light Metals 2011: Proceedings of the technical sessions presented by the TMS Aluminum Committee at the TMS 2011 Annual Meeting and Exhibition   Check publisher's open access policy
Place of Publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Publication Year 2011
Sub-type Fully published paper
DOI 10.1002/9781118061992.ch184
ISBN 9781118029350
9781118061992
ISSN 0147-0809
1096-9586
Editor Stephen J. Lindsay
Start page 1085
End page 1090
Total pages 6
Collection year 2012
Language eng
Formatted Abstract/Summary
Ledge-free sidewall is preferred as it potentially reduces the energy requirement of aluminium production by about 30%. However, this approach poses great material challenges because such sidewalls are in direct contact with oxidizing, corrosive and reducing environments at different cell locations. In this study, NiAl2O4, MgAl2O4 and Ni0.5Mg0.5Al2O4, were identified and tested in cryolite-AlF3-Al203-CaF2 electrolyte melts at 980°C under air and CO2. Both specimens and baths were characterized using XRD, XRF and SEM-EDS methods. This study revealed that the NiAl2O4 and MgAl2O4 spinels had good corrosion resistance toward the melts under CO2, with solubility of Ni from NiAl2O4 being 0.01wt% and Mg from MgAl2O4 being 0.07wt%. Dissolution of Ni and Mg into the bath was lowered to 0.007wt% Ni and 0.05wt% Mg through the formation of a Ni0.5Mg0.5Al2O4 solid solution.
Keyword Aluminate spinel
Sidewall
Corrosion behavior
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
Non HERDC
 
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Created: Thu, 20 Oct 2011, 03:13:16 EST by Dr Xiao-yong Yan on behalf of School of Chemical Engineering