中国有色冶金

Aluminum electrolysis technology with inert anode is an important technology for the sustainable low-carbon development of the future aluminum industry and forachieving the strategic goal of carbon neutrality. Inert anode material is one of the core forachieving inert anode aluminum electrolysistechnology.In recent years, domestic and foreign scholars have conducted extensive research on inert anode materials for aluminum electrolysis and made significant progress.The latest research progress of metal alloy, NiFe₂O₄ based cermet anodes, and inert anode aluminum electrolysis technology were focused on in this article. The optimization methods and research status of NiFe₂O₄ based cermet materials were discussed from three aspects: sintering and preparation process optimization, ceramic phase optimization, and metal phase optimization. The conductive and corrosion mechanisms of NiFe₂O₄ based cermet anodeswere also elucidated. Finally, important conclusions that can be clarified from the current research were summarized, and it was believed that aluminum electrolysis technology using vertical electrode structures and metal ceramic inert anodes is the main direction for future industrialization. The main problem that needs to be solved in research and development is to improve the corrosion resistance of inert anodes while balancing mechanical properties (thermal shock resistance) and conductivity. Ceramic phase optimization will focus onenhancing the corrosion resistance and conductivity of metal ceramics. The optimization goal of metal phases is to improve the thermal shock resistance of metal ceramics and form a dynamic and dense corrosion-resistant film layer during the electrolysis process in conjunction with ceramic phases.