| Abstract Scope |
Spent Potlining (SPL) is a solid waste generated during the primary aluminium electrolysis process. Approximately 20-30 kg of SPL is produced per tonne of primary aluminium and a significant amount of the SPL generated today is stored in secure facilities at or near aluminium smelters. SPL is classified as a hazardous waste, and there are various options for treating it before storage or transportation. There is also ongoing research on the use of SPL as a feedstock in other processes, and there have been a number of commercial partnerships in recent times. The International Aluminium Institute (IAI) has developed an industry guidance document that describes good practice for sustainable SPL management, subject to local constraints, risks and regulatory regimes. Case studies, data and other supporting information have been collated to provide a comprehensive overview to support sustainable management of SPL across the aluminium industry. |