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Recovery of Scandium, Nickel and Cobalt from Hydrometallurgical Waste of Laterite
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Recovery of Scandium, Nickel and Cobalt from Hydrometallurgical Waste of Laterite
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Journal Article
Recovery of Scandium, Nickel and Cobalt from Hydrometallurgical Waste of Laterite
2024
Overview
Recovery of new-energy critical metals including scandium, nickel and cobalt as well as copper and zinc from a neutralization residue produced in laterite hydrometallurgical process has been studied. Effect of leaching parameters such as acid consumption, solution pH and temperature has been investigated. It was found that scandium, nickel, cobalt and copper could be recovered at high efficiencies from the residues by selective leaching using sulphuric acid solutions under ambient conditions, while the co-leaching of impurities including iron, aluminium and silicon was low under the optimal conditions. The nickel, cobalt, copper and zinc in the leaching solution could be further concentrated into mixed sulphides and separated from impurities by sulphide precipitation.
