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코발트와 니켈 금속혼합물로부터 무기산 및 유기산에 의한 침출

Leaching of Cobalt and Nickel from Metallic Mixtures by Inorganic and Organic Acid Solutions

Thanh Tuan Tran|이만승|송시정|문현승
한국자원리싸이클링학회|2021.04|자원리싸이클링 (Resources Recycling)|제30권 제2호|pp. 53-60|DOI 10.7844/kirr.2021.30.2.53

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키워드

코발트니켈CobaltNickel침출Leaching금속혼합물Metallic mixture
주제분류자원공학

초록

폐리튬이온배터리에 함유된 코발트, 니켈 및 구리를 회수하기 위한 공정 개발의 일환으로 단일금속과 금속혼합물의 침출을 조사했다. 이를 위해 산화제를 첨가하지 않은 무기산과 유기산을 침출제로 사용했다. 본 논문의 실험조건에서 산화제가 없는 무기산과 유기산에서구리는 전혀 침출되지 않았다. 염산과 황산용액에서 산의 농도, 반응온도, 반응시간 및 광액농도를 변화시켜 단일 금속를 모두 용해시킬수 있는 조건을 구했다. 또한 염산과 황산용액에서 금속혼합물로부터 니켈과 코발트를 99% 이상 침출시킬 수 있는 조건을 조사했다. 메탄술폰산으로 코발트와 니켈 금속혼합물을 침출시 낮은 반응온도에서 코발트가 선택적으로 침출됐다.

Abstract

Leaching experiments from single metal and metallic mixtures were conducted to develop a process for the recovery of cobalt, copper, and nickel in spent lithium ion batteries. Inorganic and organic acid solutions without oxidizing agents were employed. No copper was dissolved in the absence of an oxidizing agent in the leaching solutions. The leaching condition to completely dissolve single metal of cobalt and nickel was determined based on acid concentration, reaction temperature and time, and pulp density. The leaching condition to dissolve all of cobalt and nickel from the metallic mixtures was also obtained. Leaching of the metallic mixture with methanesulfonic acid led to selective dissolution of cobalt at low temperatures.

참고문헌 (22)

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