About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Enhancing Recycling and Reuse of Secondary Materials to Support a Circular Economy
|
| Presentation Title |
Development of 3D Hierarchical Porous Structure Using Brown Mud and Waste Glass, Designed to Maximize Porosity and Mechanical Strength |
| Author(s) |
Akansha Mehta, Jozef Kraxner, Abhijeet Lale, Martin Schwentenwein, Dusan Galusek |
| On-Site Speaker (Planned) |
Akansha Mehta |
| Abstract Scope |
The production of aluminum from bauxite in the Bayer process generates a highly alkaline waste product known as brown mud, rich in Fe2O3. This study presents a novel approach to utilizing brown mud waste in creating waste-derived glass (WDG) containing characteristic oxides Fe2O3, SiO2, CaO, and Al2O3. The WDG was melted at 1550°C, then crushed and sieved to create a feedstock to fabricate various 3D porous structures (gyroid, cubic, diamond, and kagome) by LCM (Lithography based Ceramic Manufacturing) additive technique. To increase the amount of α-Fe2O3/hematite phase in 3D structures, the structures were heat treated at 830°C, and the gyroid structure with the maximum mechanical strength of 5.85 MPa and 35% closed porosity was prepared. The mechanical properties of the gyroid structure were enhanced by 30%, and the closed porosity was reduced by 10% using the multi-material LCM, which changed the slurries every 50 layers to waste glass from WDG. |