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Recovery of Cobalt from Synthetic Leaching Solution of Manganese Nodule Matte by Solvent Extraction-electrowinning
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 Title & Authors
Recovery of Cobalt from Synthetic Leaching Solution of Manganese Nodule Matte by Solvent Extraction-electrowinning
Kim, Hyun-Ho; Nam, Chul-Woo; Park, Kyung-Ho; Yoon, Ho-Sung; Kim, Min-Seuk; Kim, Chul-Joo; Park, Sang-Woon;
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 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 during the electro-winning process.
 Keywords
Manganese nodules;Cobalt recovery;Solvent extraction;Electro-winning;
 Language
Korean
 Cited by
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