자원리싸이클링 (Resources Recycling)

  • 제30권5호
  • /
  • Pages.25-31
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  • 2021
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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과산화수소를 혼합한 염산용액으로 폐리튬이온배터리의 용융환원된 금속합금의 침출

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

  • 문현승 (목포대학교 공과대학 신소재공학과) ;
  • ;
  • 이만승 (목포대학교 공과대학 신소재공학과)
  • 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)
  • 투고 : 2021.09.08
  • 심사 : 2021.09.30
  • 발행 : 2021.10.30
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초록

폐리튬이온배터리를 고온에서 용융환원처리하면 코발트, 니켈 및 구리가 환원된 금속을 얻을 수 있다. 본 논문에서는 상기 금속외에 망간, 철 및 규소가 같이 환원된 금속합금의 침출을 조사하였다. 침출용액으로 염산에 과산화수소를 산화제로 첨가해 염산과 산화제의 농도, 반응시간 및 온도와 광액밀도를 변화시켜 니켈, 코발트 및 구리를 99% 이상 침출시킬 수 있는 조건을 조사하였다. 과산화수소 농도와 광액밀도가 금속의 침출에 미치는 영향이 현저했으며 20에서 80℃의 반응온도범위에서 반응온도는 침출에 큰 영향을 미치지 않았다. 2M의 염산용액에서 5%의 과산화수소를 혼합한 용액으로 60℃의 반응온도와 30 g/L의 광액밀도조건에서 150분 반응시키면 규소를 제외한 모든 금속이 99% 이상 침출되었다.

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℃.

키워드

과제정보

본 연구는 2021년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구결과(과제번호 20011183)이며 이에 감사드립니다.

참고문헌

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