| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
Extraction of Platinum Group Metals from Spent Catalyst Material by a Novel Pyro-metallurgical Process |
| Author(s) |
Ana Maria Martinez, Kai Tang, Camilla Sommerseth, Karen Sende Osen |
| On-Site Speaker (Planned) |
Ana Maria Martinez |
| Abstract Scope |
The extraction of platinum group metals (PGM) contained in waste automobile catalyst monolithic honeycomb was investigated by a novel approach that combines a pyro-metallurgical and electrolysis step. The first step aims to both up-concentrate the amount of PGMs by using a metal collector, as well as to prepare the conductive material to be used as anode in the electrolysis step. The electrolysis step is carried out in a molten chloride electrolyte, where the PGMs remains as metallic residue, and the refined metal is further reused in the pyro-metallurgical step. Optimisation of the pyro-metallurgical process led to 82-106% metal recovery rates, while the PGM recovery rates were close to 100%. Furthermore, the electrolyte composition and working temperature, as well as cell design of the subsequent electrolytic method were adjusted. The process was assessed in a lab-scale electrolysis reactor, where PGMs could be extracted selectively with a current efficiency of ca. 70%. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Pyrometallurgy, Electrometallurgy |