Hydrometallurgical Process for Copper Recovery from Waste Printed Circuit Boards (PCBs)

Hoang, L L and Jeong, Jinki and Lee, Jae-chun and Pandey, B D and Yoo, Jae-Min and Trung, H H (2011) Hydrometallurgical Process for Copper Recovery from Waste Printed Circuit Boards (PCBs). Mineral Processing and Extractive Metallurgy Review, 32 (2). pp. 90-104.

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Present paper focuses on the selective recovery of copper from the enriched ground printed circuit boards (PCBs) using leaching and solvent extraction. The metal-enriched ground sample obtained from the beneficiation of the sized PCBs in a laboratory scale column type air separator contained mainly 49.3% Cu, 3.83% Fe, 1.51% Ni, 5.45% Sn, 4.71% Pb, and 1.85% Zn. The leaching of the enriched sample with 3.5mol/L nitric acid dissolved 99% copper along with other metals at 323K temperature and 120g/L pulp density in 1h time. The composition of the leach liquor with wash solution was found to be 42.11g/L Cu, 2.12g/L Fe, 4.02g/L Pb, 1.58g/L Zn, and 0.4g/L Ni. The McCabe-Thiele plot indicated the requirements of three counter-current stages for maximum extraction of copper from the leach liquor at pH 1.5 using 30, 40, and 50% (v/v) LIX 984N at the phase ratios (A/O) of 1:3, 1:2, and 1:1.5, respectively. The counter-current simulation studies show the selective extraction of 99.7% copper from the leach liquor feed of 1.5 pH in three stages with 50% LIX 984N at A/O phase ratio of 1:1.5. The stripping of copper from the loaded organic with sulfuric acid produced copper sulfate solution from which copper metal/powder could be recovered by electrolysis/ hydrogen reduction.

Item Type:Article
Official URL/DOI:DOI: 10.1080/08827508.2010.530720
Uncontrolled Keywords:beneficiation; copper leaching; LIX 984N; solvent extraction; waste printed circuit boards
Divisions:Metal Extraction and Forming
ID Code:4144
Deposited By:Dr. A K Sahu
Deposited On:18 Oct 2011 16:33
Last Modified:21 Nov 2011 12:27
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