Abstract
In 2014, Alouette acquired a system to monitor the on-line anode current on two pots. This system, developed and supplied by WIT, reports all anodes current and the pot voltage for every second of operation. The following paper describes some of the resulting improvements that apply to the process control of the aluminum electrolysis cell.
Current monitoring of the anodes easily indicates the generation of localized anode effects (AE) prior to their propagation into a “voltage triggered” AE. Basic concepts, algorithms, results and optimization to improve the detection rate are discussed in the first part of the paper.
Moreover, AE are directly influenced by the alumina distribution in the cell. A better understanding of the dissolution patterns based on the feeder’s position was achieved by using the monitoring system.
Keywords
- WIT
- anode current
- anode effect detection
- alumina distribution
- cell instability
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References
Evans, J.W., A. Lutzerath, and R. Victor, On-line monitoring of anode currents; Experience at Trimet, in TMS — Light Metals 2014: San Diego, CA. p. 739–742.
Evans, J.W. and N. Urata. Technical and operational benefits of individual anode current monitoring. in 10th Australasian aluminium smelting conference. 2011. Lauceston, Tasmania.
Tarcy, G.P. and A.T. Tabereaux, The initiation, propagation and termination of anode effects in Hall-Heroult cells, in TMS — Light metals, S. Lindsay, Editor 2011. p. 329–332.
Kvande, H., et al., Pseudo Resistance Curves for Aluminium Cell Control — Alumina Dissolution and Cell Dynamics, in TMS — Light Metals, R. Huglen, Editor 1997.
Grjotheim, K. and B. Welch, Aluminium Smelter Technology. 2nd edition. 1988, Dusseldorf, Germany: Aluminium-Verlag.
Feng, Y., M. Cooksey, and P. Schwarz, CFD Modelling of alumina mixing in aluminium reduction cells, in TMS -Light metals, S. Lindsay, Editor 2011. p. 543–548.
Hofer, T., Numerical simulation and optimization of the alumina distribution in an aluminium electrolysis pot, in Sciences de Base — Chaire d’analyses et de simulations numériques 2011, École polytechnique fédérale de Lausanne: Lausanne. 121 pages.
Moxnes, B.P., et al., Improved cell operation by redistribution of the alumina feeding, in TMS — Light metals, G. Bearne, Editor 2009. p. 461–466.
Coursol, P., et al., The transition strategy at Alouette towards higher productivity with a lower energy consumption, in TMS — Light metals, C. Suarez, Editor 2012. p. 591–595.
Severo S., D., et al., Comparison of various methods for modeling the metal-bath interface, in TMS — Light metals, D. DeYoung, Editor 2008.
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© 2015 TMS (The Minerals, Metals & Materials Society)
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Dion, L., Lagacé, CL., Evans, J.W., Victor, R., Kiss, L.I. (2015). On-line Monitoring of Individual Anode Currents to Understand and Improve the Process Control at Alouette. In: Hyland, M. (eds) Light Metals 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48248-4_122
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DOI: https://doi.org/10.1007/978-3-319-48248-4_122
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48610-9
Online ISBN: 978-3-319-48248-4
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