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Physical Processing of Discarded Integrated Circuits for Recovery of Metallic Values

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ARTICLE DOWNLOAD

Physical Processing of Discarded Integrated Circuits for Recovery of Metallic Values

10$

Amit Barnwal & Nikhil Dhawan 

Abstract

Recycling of discarded integrated circuits is an important issue related to waste management, resource conservation, and metal recovery aspects. In this study, physical processing comprising water fluidization, magnetic separation, and density separation of discarded units was followed to recover Cu, Fe, Ni, and Si values. The fluidization technique provided an enriched metal concentrate comprising 53.05% Cu, 16.2% Fe, and 10.5% Ni in the underflow fraction, and the overflow fraction comprised 63.1% Si with 17.8% C. High metallic dissolution was attained for the processed samples compared with the feed leaching because of effective separation of the non-metallic fraction during physical processing. Overall, 1 kg of discarded ICs yielded ~ 120 g ferrous metal with ~ 57.4% Fe and ~ 26% Ni purity and ~ 390 g metallic values with 85% Cu and ~ 490 g non-metallic values with ~ 84% Si.

Only units of this product remain
Year 2020
Language English
Format PDF
DOI 10.1007/s11837-020-04137-0