Archives of Metallurgy and Materials (Dec 2021)

Study on Recovery of Valuable Metals in Spent Lithium-Ion Batteries by Al2O3-SiO2-CaO-Fe2O3 Slag System

  • Tae Boong Moon,
  • Chulwoong Han,
  • Soong Keun Hyun,
  • Sung Cheol Park,
  • Seong Ho Son,
  • Man Seung Lee,
  • Yong Hwan Kim

DOI
https://doi.org/10.24425/amm.2021.136410
Journal volume & issue
Vol. vol. 66, no. No 4
pp. 983 – 986

Abstract

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This study investigated the recovery behavior of valuable metals (Co, Ni, Cu and Mn) in spent lithium ion-batteries based on Al2O3-SiO2-CaO-Fe2O3 slag system via DC submerged arc smelting process. The valuable metals were recovered by 93.9% at the 1250℃ for 30 min on the 20Al2O3-40SiO2-20CaO-20Fe2O3 (mass%) slag system. From the analysis of the slag by Fourier-transform infrared spectroscopy, it was considered that Fe2O3 and Al2O3 acted as basic oxides to depolymerize SiO4 and AlO4 under the addition of critical 20 mass% Fe2O3 in 20Al2O3-40SiO2-CaO-Fe2O3 (CaO + Fe2O3 = 40 mass%). In addition, it was observed that the addition of Fe2O3 ranging between 20 and 30 mass% lowers the melting point of the slag system.

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