Exploration of alternative routes for recycling critical metals from waste PCB and tantalum capacitors
| Autor: | Murilo Masalskas, Pierre D'Ans, Aurélien Janssen, Frédérique Bastin, Yannick Lolivier, Adrien Van Rechem |
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| Rok vydání: | 2020 |
| Předmět: |
Tantalum capacitor
0209 industrial biotechnology Materials science Metallurgy Tantalum chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences law.invention Metal Printed circuit board 020901 industrial engineering & automation chemistry law visual_art visual_art.visual_art_medium General Earth and Planetary Sciences Calcination Tantalum oxide Solvolysis Pyrolysis 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Procedia CIRP. 90:437-442 |
| ISSN: | 2212-8271 |
| DOI: | 10.1016/j.procir.2020.01.112 |
| Popis: | Printed Circuit Boards (PCB), secondary source of critical metals, are usually recycled to recover precious metals. Alternative routes, aiming to pre-concentrate critical metals, were tested at lab scale. An up-scaling process is proposed involving a thermomechanical separation of PCB and surface mounted devices (SMD). PCB without SMD are treated by solvolysis for desilication and debromination. Further calcination provides a presumably leachable metallic mix. Tantalum capacitors, a specific type of SMD, are treated by pyrolysis, to isolate metallic cores, which are further leached to obtain 92% pure tantalum oxide. LCA data show that tantalum recycling process is profitable for the environment. |
| Databáze: | OpenAIRE |
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