Thermal conductivity of the sideledge in aluminium electrolysis cells: Experiments and numerical modelling

During aluminium electrolysis, a ledge of frozen electrolytes generally forms, attached to the sides of the cells. This ledge serves as a protective layer, preventing erosion and chemical attacks of both the electrolyte melt and the liquid aluminum. This study aims to experimentally and numerically investigate the thermal conductivity of this sideledge. The methodology involves a series of experimental tests to measure the thermal properties of the sideledge material in addition to numerical modelling to simulate its behavior under different operational conditions. Experimental results demonstrate the thermal conductivity values, which are critical for optimizing the design and operation of aluminium electrolysis cells. The numerical model supports these findings by providing a comprehensive understanding of heat transfer mechanisms. Collectively, the results indicate that the thermal properties of the sideledge significantly influence the overall efficiency of the electrolysis process. The research contributes valuable insights into the key thermal characteristics of materials used in aluminium production, highlighting the importance of understanding the interactions within electrolysis cells. This knowledge enables better control of operational parameters, potentially leading to enhanced efficiency and reduced energy consumption in aluminium manufacturing processes.