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http://dx.doi.org/10.7844/kirr.2021.30.5.25

Leaching of Smelting Reduced Metallic Alloy of Spent Lithium Ion Batteries by the Mixture of Hydrochloric Acid and H2O2  

Moon, Hyun Seung (Department of Advanced Material Science & Engineering, Institute of Rare metal, Mokpo National University)
Tran, Thanh Tuan (Department of Advanced Material Science & Engineering, Institute of Rare metal, Mokpo National University)
Lee, Man Seung (Department of Advanced Material Science & Engineering, Institute of Rare metal, Mokpo National University)
Publication Information
Resources Recycling / v.30, no.5, 2021 , pp. 25-31 More about this Journal
Abstract
Smelting reduction of spent lithium-ion batteries results in the production of metallic alloys in which reduced cobalt, nickel and copper coexist. In this study, we investigated the leaching of the metallic alloys containing the above three metals together with iron, manganese, and silicon. The mixture of hydrochloric acid and hydrogen peroxide as an oxidizing agent was employed, and the effect of the concentration thereof, the reaction time and temperature, and pulp density was investigated to accomplish the complete leaching of cobalt, nickel, and copper. The effect of the hydrogen peroxide concentration and pulp density on the leaching was prominent, compared to that of reaction time and temperature, especially in the range of 20 to 80℃. The complete leaching of the metals present in metallic alloys, except silicon, was accomplished using 2 M HCl and 5% H2O2 with a pulp density of 30 g/L for 150 min at 60℃.
Keywords
Spent lithium ion batteries; cobalt; nickel; recovery; leaching; HCl;
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