Anode bottom burnout shape and velocity field investigation in a high amperage electrolysis cell

The investigation of the anode bottom burnout shape and velocity field in a high amperage electrolysis cell is essential for optimizing the performance of aluminium production. The objective of this study was to systematically measure spent prebake anode bottom profiles at a Rusal 309 kA cell to better understand the liquid metal deformation and its impact on MHD stability, velocity fields, and electrical efficiency. A combination of experimental measurements and modeling using specialized MHD-VALDIS software was employed to characterize the magnetic field distribution and flow velocities of the liquid metal. Results demonstrate the interplay between the anode bottom shape profiles and the stability of the cell, offering insights into historical performance and operational efficiency. The findings highlight the crucial role of liquid metal interface deformation in the dynamics of aluminium electrolysis cells and contribute to the existing knowledge in the field of industrial aluminium production. This work underscores the importance of continuous measurement and model validation in optimizing electrolysis cell designs and enhancing overall productivity in the aluminium industry.