| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
REWAS 2022: Recovering the Unrecoverable
|
| Presentation Title |
Recovery of Precious Metal Silver from Scrap Computer Keyboards |
| Author(s) |
Rekha Panda, Om Shankar Dinkar, Pankaj Kumar Choubey, Rukshana Parween, Manis Kumar Jha, Devendra Deo Pathak |
| On-Site Speaker (Planned) |
Rekha Panda |
| Abstract Scope |
Silver (Ag) is extensively used in manufacturing of electronic goods due to its low-cost and conductivity. In view of the escalating demand, stringent environmental rules and limited primary sources of Ag, present paper is focused on the development of hydrometallurgical process flow-sheet to extract Ag from scrap computer keyboards. These keyboards contain ~0.4% Ag. Initially, scrap keyboards were dismantled to separate the Mylar sheet containing Ag. The same was pyrolysed at 300 °C for 2 h to get enriched metallic part (~2%). About 99.99% Ag was leached using 2 M HNO3 at 60 °C within 30 min in closed and proper condensed system. Separation techniques (precipitation/ cementation) could be use to obtain high purity Ag salt/ metal. Based on the laboratory scale experiments, the process flow-sheet developed is economical, eco-friendly and has potential to be translated to industry for commercial exploitation after scale up/ pilot trial. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Hydrometallurgy, Recycling and Secondary Recovery |