Optimisation of the cathode collector bar in a Hall-Héroult cell

Authors: Gagnon-Morin, Mathieu
Advisor: Fafard, Mario
Abstract: A finite element model of a cathode assembly including a copper insert inside the steel collector bar was developed. This thermo-electro-mechanical model includes interfaces to simulate the contact between different materials. In order to optimize this model, an economic analysis based on the electrical operating cost, the relining cost and the life expectancy of a pot is proposed. The geometry of the model is subsequently varied in order to generate a multidimensional response surface based on these economic criteria. Results indicate that substantial economies can be achieved by reducing the collector bar's resistivity and by improving contact at the interface. New promising cathode assembly designs are also analysed. A design using a copper rod inserted in a hole drilled in the carbon block to collect the current is promising. Finally, this model provides some insight in the contact between the different materials of the cathode assembly and its effect on the cell performance.
Document Type: Mémoire de maîtrise
Issue Date: 2013
Open Access Date: 23 April 2018
Permalink: http://hdl.handle.net/20.500.11794/25886
Grantor: Université Laval
Collection:Thèses et mémoires

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