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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:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Optimizing Zr and REE Recovery from Zircon through a Better Understanding of the Mechanisms Governing its Decomposition in Alkali Media
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Reclamation of Precious Metals from Small Electronic Components of Computer Hard Disks
Recovery of Manganese and Cobalt from Discarded Batteries of Toys
Recovery of Platinum Group Metals from Secondary Sources by Selective Chlorination from Molten Salt Media
Recovery of Rare Earths from Waste Permanent Magnets Leach Liquors
Recovery of Strategic Materials from Canadian Bauxite Residue by Smelting Followed by Acid Baking – Water Leaching
Recycling of End-of-life Lithium-ion Battery of Electric Vehicles
Review on Removal of Impurities from REE Processing Solutions
Secondary and Byproduct Sources of Rare Earth Metals
Selective Lithium Recovery from Brines Using Hydrothermally Treated Titania Slag
Selective Recovery of Scandium from Nickel Laterite Ore by Acid Roasting - Water Leaching
Separation of Neodymium and Dysprosium by Molten Salt Electrolysis Using an Alloy Diaphragm
Supercritical Fluid Extraction of Rare Earth Elements from a Canadian Ore
Supercritical Fluid Extraction of Rare Earth Elements from Waste Fluorescent Lamp
The Dynamics of the Circular Economy of Rare Earth Elements
The Iron Precipitate from Primary Zinc Production – A Potential Future Source for Indium and Silver

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