| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Electrification of Iron and Steel
|
| Presentation Title |
Electrochemical Co-Recovery of Energy Critical Metals, Silica, and Calcium and Magnesium Hydroxides from Slags |
| Author(s) |
Prince Ochonma, Greeshma Gadikota |
| On-Site Speaker (Planned) |
Prince Ochonma |
| Abstract Scope |
The vast quantities of underutilized iron and steel slags and the significant quantities of energy critical metals in these resources motivate transformative advances in their selective fractionation to co-produce silica, calcium- and magnesium hydroxides, and an effluent concentrated in energy critical metals. In a significant departure from conventional pH swing based dissolution of slags to recover these materials by harnessing externally supplied acids and bases, an electrochemical approach that generates an in-situ pH swing is developed to dissolve the metallic constituents of slags to precipitate silica, calcium- and magnesium hydroxide, and generate an effluent concentrated in energy critical metals. Approaches to achieve energy – efficient electrochemical fractionation of slags are discussed. The possibility of harnessing Ca- and Mg-bearing hydroxides to capture and convert CO2 to provide Ca- and Mg-bearing carbonates are also evaluated. |