| Abstract Scope |
Reducing the voltage drop of cathode carbon blocks is a critical approach for energy-saving modifications in aluminum electrolysis pots. Graphitized cathodes, characterized by low resistivity, can significantly decrease cathode voltage drop. However, this technology may lead to increased horizontal currents in the aluminum liquid, higher costs due to the poor wear resistance of graphitized cathodes, which can shorten pot lifespan. Therefore, exploring the use of graphite cathodes to achieve comparable energy-saving effects holds significant economic value. This study developed a novel cathode carbon block assembly based on graphite cathodes. By balancing the cathode voltage drop (220–260 mV) with aluminum flow velocity and incorporating a variable-cross-section steel bar design to reduce horizontal currents, along with advanced energy-saving materials to optimize isothermal distribution, the system achieved self-balanced cathode heat dissipation. Industrial applications demonstrate that this technology can reduce the DC energy consumption of aluminum electrolysis pots to below 12500 kWh/t-Al. |