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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Bauxite Residue Valorization and Best Practices
Presentation Title Towards scalable autoclaved masonry units: how bauxite residue feedstock characteristics impact performance
Author(s) Tobias Hertel, Yakinthi Avtzi, Nikolaos Athanasakis, Fábio Oliveira, Glenn Beersaerts, Yiannis Pontikes
On-Site Speaker (Planned) Tobias Hertel
Abstract Scope One barrier for the valorisation of bauxite residue (BR) in the construction sector is the limited benefit to the performance. Various processing routes to enhance the reactivity are discussed in the literature; however, they are often limited to lab-scale testing, with economic feasibility and sustainability often not considered. In this study, we propose an alternative process for transforming a BR-rich blend into autoclaved masonry units and investigate the impact of different BR feedstocks on their performance. To minimise environmental and economic risks of a potential implementation, off-the-shelf-equipment with industrial process parameters were used (200°C-16 bar steam pressure). Results demonstrated a dependence of performance on the BR-feedstock characteristics, notably phase assemblage and pore solution chemistry. The mechanical properties varied, ranging from 10-25 MPa. Selected blends were successfully scaled up to tiles using pilot-scale equipment, indicating the technical feasibility to upscale and implement the process for a wide range of BRs.
Proceedings Inclusion? Planned: TMS Journal: Journal of Sustainable Metallurgy

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A linear programming-based approach for creating cements from bauxite residue
Assessing the Carbonation Potential of De-alkalized Bauxite Residue Using Different Carbonation Methods
Assessment of High Temperature Valorisation Routes for Bauxite Residue towards Cementitious Binders: A Case Study on Vitrification
Bauxite residue valorisation in a zero emission, zero waste and sustainability policy context
BR valorisation: can we see it differently?
Developments in EGA’s bauxite residue roadmap
Hydrogen-driven Sustainable Multi-metal Recovery Approaches for Bauxite Residue: A Comparative Analysis
Innovative Hydrometallurgical Methods for Extracting Metallic Oxides from Bauxite Residue
Optimising bauxite residue for use as a soil component
Pelletization and hydrogen reduction of bauxite residue in pilot scale
Processing routes of Bauxite Residue and its Valorisation Potential: Various case studies demonstrated at pilot scale
Recovery of alumina and soda from high tatania containing bauxite residue
Recovery of Titanium from Production Residues via Physical and Chemical Processing
Red mud to produce sustainable iron and steel - A thermodynamic analysis
Revolutionizing Mineralogy Prediction in Sulfoaluminate Cements: A New Modified Bogue Equation for Elevated Bauxite Residue Content
Study of Ceramic Material Manufacturing with Red Mud and Fayalite Slag
Synergistic pyrolysis with Refuse-Derived Fuel (RDF) can neutralize bauxite residue (BR)
The effect of freeze-thaw cycle on mechanical and morphological properties of bauxite residue-based geopolymer
Towards scalable autoclaved masonry units: how bauxite residue feedstock characteristics impact performance
Utilizing Mining Tailings for Sustainable Steel and Rare Earth Element Recovery

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