|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Effect of Steel Multi-collector Bars on Current Density and Magnetohydrodynamic Stability in an Aluminum Reduction Cell
||Meijia Sun, Baokuan Li, Linmin Li, Jian-ping Peng
|On-Site Speaker (Planned)
The horizontal current (HC) plays an important role on magnetohydrodynamic (MHD) instability and energy consumption. The steel multi-collector bars were proposed to reduce HC. Nonetheless, the mechanism was not fully understood. A transient three-dimensional mathematical model was developed to investigate the effect of the structure on current density and MHD stability. The solution of momentum equation was implemented by coupling of Lorentz force through solving the electrical potential equation. The volume of fluid (VOF) approach was used to track the electrolyte (bath)-molten aluminum (metal) interface. The results show that the steel multi-collector bars decrease the HC effectively by increasing the current path. Compared with the steel single-collector bar, the steel multi-collector bars cause a decrease in cathode voltage drop (CVD). The maximum bath-metal interface fluctuation can also be reduced, which is contributed to the MHD stability.
||Planned: Light Metals