| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
Metal recovery from mine waste streams using desilication products of the Bayer process |
| Author(s) |
Hong (Marco) Peng, James Vaughan, Tae Kim |
| On-Site Speaker (Planned) |
Hong (Marco) Peng |
| Abstract Scope |
Reactive silica in bauxite causes the loss of soda associated with the precipitated Desilication Products (DSP) in Bayer process. Based on formation chain of DSPs, these DSPs belong to low aluminium to silica ratio zeolites, such as amorphous phase, zeolite LTA and sodalite. Due to the zeolites’ microporous properties, they have many applications within various fields such as in laundry detergents and metal adsorption in solution. In this study, the synthesized three types of DSPs (amorphous phase, zeolite LTA and sodalite) were used as adsorbents for metal ions (Cu2+, Pb2+ and Co2+) recovery in mine waste streams. The results show that amorphous phase has highest adsorption capacity for all testing metal ions. For mixing metal ion solution, sodalite shows the highest selectivity of Pb2+ against Cu2+and Co2+. These findings would benefit mining industry for utilizing mine waste as adsorbents for resource recovery. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Extraction and Processing, Hydrometallurgy, |