| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
Reclamation of Precious Metals from Small Electronic Components of Computer Hard Disks |
| Author(s) |
Rekha Panda, Manis Kumar Jha, Om Shankar Dinkar, Devendra Deo Pathak |
| On-Site Speaker (Planned) |
Rekha Panda |
| Abstract Scope |
Present research work focus on the recovery of precious metals (Ag, Au, Pd and Pt) from the leach liquor of small populated chips present in the hard disks of computers. Initially, the hard disks were dismantled to separate the printed circuit boards (PCBs) followed by its depopulation to liberate the mounted small electronic parts. The liberated black chips were pulverized and physically beneficiated by wet scrubbing technique to separate the metallic and non-metallic fractions. The metallic concentrate (containing ~0.6% Ag, ~0.3% Au, ~0.01% Pd, ~0.0003% Pt, 20% Cu, etc.) was first leached in nitrate medium for maximum dissolution of non-ferrous metals along with Ag leaving Au, Pd and Pt in the residue. About 99.99% precious metals were leached out from the residue using suitable lixiviant. The obtained leach liquor was purified using advance separation techniques (solvent extraction/ ion-exchange/ precipitation) from which marketable products (metals/ salts) could be produced. |
| Proceedings Inclusion? |
Planned: |