| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bauxite Residue Valorization and Best Practices
|
| Presentation Title |
Synergistic Pyrolysis with Refuse-Derived Fuel (RDF) Can Neutralize Bauxite Residue (BR) |
| Author(s) |
Roberto Seno, Rodrigo Aparecido Moreno, Fabio Minoru Yamaji, Maria Cecília Veloso |
| On-Site Speaker (Planned) |
Roberto Seno |
| Abstract Scope |
The high alkalinity of Bauxite Residue (BR) presents technical and economic challenges for its reuse. This study investigated the alkaline neutralization of BR through synergistic pyrolysis with products from Refuse-Derived Fuel (RDF). Two types of RDF were used along with BR from CBA’s alumina refinery in Brazil. Various mass proportions (0, 10, 20, and 50% w/w) of RDF were employed for synergistic pyrolysis. Pyrolysis was conducted at temperatures of 200, 400, 600, and 800 ºC using a muffle furnace and crucibles, with a residence time of 20 minutes. The pH of the mixtures after pyrolysis decreased as the proportion of RDF increased. Results indicated that neutralization of BR occurred at temperatures of 200 and 400 ºC. The best performance was observed with 50% RDF at 400 ºC, achieving a final pH of 8. Synergistic pyrolysis of BR and RDF effectively reduced the alkaline content of the bauxite residue. |
| Proceedings Inclusion? |
Planned: TMS Journal: Journal of Sustainable Metallurgy |
| Keywords |
Aluminum, Sustainability, Other |