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aluminum-reduction-cells
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A new wave equation for MHD instabilities in aluminum reduction cells
, Article TMS 2007 Annual Meeting and Exhibition, Orlando, FL, 25 February 2007 through 1 March 2007 ; 2007 , Pages 345-349 ; 01470809 (ISSN) ; 0873396596 (ISBN); 9780873396592 (ISBN) ; Saboohi, Y ; Sharif University of Technology
2007
Abstract
To overcome the problem of magneto hydrodynamic instabilities at the aluminum-cryolite interface in aluminum reduction cells, the use of a simple and efficient model has been suggested. In this paper a new model for evaluation of magneto hydrodynamic instabilities in aluminum reduction cells is proposed. This model is in the form of a wave equation for interfacial oscillations and is constructed based on Shallow Water approximation and linear stability analysis. In this model two terms for linear friction in each molten layer of aluminum and cryolite has been considered and also Lorentz forces in cryolite layer have not been neglected. By accounting of these additional terms in our model,...
Alumina feeding system changes in aluminum electrochemical cell with d18 technology for energy efficiency (Case study: Almahdi-hormozal aluminum smelter)
, Article 147th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2018, 11 March 2018 through 15 March 2018 ; Volume Part F12 , 2018 , Pages 721-728 ; 23671181 (ISSN); 9783319725253 (ISBN) ; Samimi, A ; Baharvand, B ; Sharif University of Technology
Springer International Publishing
2018
Abstract
Aluminum reduction cells have benefited from point feeding technology for a long time, but there are still smelters which are using the old technology of center break and center feed system. Due to several factors this system is no longer approved and there have been a few attempts worldwide to upgrade these cells so as to implement the newer technology by applying mechanical and automation changes. In this paper we will present an attempt which was made in order to retrofit a so-called center break cell to point feeder cell. The results show that this project has decreased the energy consumption and anode effect frequency. Furthermore, there has been a significant increase in current...
Two-dimensional model of melt flows and interface instability in aluminum reduction cells
, Article Light Metals 2008, New Orleans, LA, 9 March 2008 through 13 March 2008 ; 2008 , Pages 443-448 ; 01470809 (ISSN); 9780873397100 (ISBN) ; Sharif University of Technology
2008
Abstract
We derive a new non-linear two dimensional model for melt flows and interface instability in aluminum reduction cells. This model is based on non-linear de St. Venant shallow water equations and contains the main features of an aluminum reduction cell. In this model we consider linear friction terms but in a new way that has not been considered in previous works. Our results are in good agreement with the results of simulation of viscous flow. This model is applicable both in determination of melt flows in molten aluminum and cryolite layers and also in finding the extreme limit for stability of interfacial waves in an aluminum reduction cell