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http://dx.doi.org/10.7844/kirr.2016.25.2.33

Recovery of Cobalt from Synthetic Leaching Solution of Manganese Nodule Matte by Solvent Extraction-electrowinning  

Kim, Hyun-Ho (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Nam, Chul-Woo (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Park, Kyung-Ho (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Yoon, Ho-Sung (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Kim, Min-Seuk (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Kim, Chul-Joo (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Park, Sang-Woon (Extractive metallurgy department, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Resources Recycling / v.25, no.2, 2016 , pp. 33-41 More about this Journal
Abstract
A scale up tests (380 kg/day) using a continuous solvent extraction and electro-winning system was carried out to separate and recover cobalt from a solution containing 1.91 g/L Co and 14.65 g/L Ni. The solution was obtained during a process including solvent extraction and precipitation stages for removal of Cu and Fe from a synthetic sulfuric acid solution of manganese nodule matte. The optimal condition for solvent extraction was : solvent concentration of 0.22M Na-Cyanex 272 (45% saponified with NaOH) and O:A phase ratios of 1:1.5, 10:1 and 1.5:1 used in extraction, scrubbing and stripping stages, respectively. The extraction and stripping efficiencies were found to be 99.8% and 99.88%, respectively. The stripped solution contained 40.27 g/L Co with 4 ppm Ni. Cobalt metal of 99.963% purity was yielded with current efficiency of 67% and current density of $0.563A/dm^2$ during the electro-winning process.
Keywords
Manganese nodules; Cobalt recovery; Solvent extraction; Electro-winning;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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