자원리싸이클링 (Resources Recycling)

  • 제30권6호
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  • Pages.61-67
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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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이리듐 회수를 위한 시멘테이션 공정 중 초음파 조사의 영향

Effect of Ultrasound Irradiation during Cementation Process for Recovery of Iridium

  • 김승현 (강원대학교 신산업개발 T-EMS 융합학과) ;
  • 김영진 (한국석회석신소재연구소 연구개발실) ;
  • 서준형 (한국석회석신소재연구소 연구개발실) ;
  • 조진상 (한국석회석신소재연구소 연구개발실) ;
  • 조계홍 (한국석회석신소재연구소 연구개발실) ;
  • 이재령 (강원대학교 에너지.자원공학과)
  • Kim, Seunghyun (Department of Integrated Energy and Infra system, Kangwon National University) ;
  • Kim, Young-Jin (Department of Research and Development, Korea Institute of Limestone and Advanced Materials) ;
  • Seo, Jun-Hyung (Department of Research and Development, Korea Institute of Limestone and Advanced Materials) ;
  • Cho, Jin-Sang (Department of Research and Development, Korea Institute of Limestone and Advanced Materials) ;
  • Cho, Kye-Hong (Department of Research and Development, Korea Institute of Limestone and Advanced Materials) ;
  • Lee, Jaeryeong (Department of Energy & Resources Engineering, Kangwon National University)
  • 투고 : 2021.12.02
  • 심사 : 2021.12.21
  • 발행 : 2021.12.31
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초록

이리듐이 함유된 염산 침출액으로부터 시멘테이션법을 이용한 이리듐 회수 연구를 실시하였다. 환원제로는 아연을 사용하였으며, 환원제 투입량, 이리듐 초기 농도, 초기 pH, 반응 시간 변화 및 초음파 처리에 따른 이리듐 회수율 특성 실험을 실시하였다. 교반기만 사용한 조건에서는 아연 투입량 증가에 따라 이리듐의 회수율이 지속적으로 증가하였으나, 아연 당량이 40 조건에서 70% 수준의 이리듐 회수율을 나타냈다. 초음파 처리에 따른 시멘테이션 조건에서는 아연 투입량이 20 당량 이하 조건에서 이리듐의 회수율이 감소하였고, 40 당량 조건에서는 이리듐 회수율이 급격히 증가하는 특성을 나타났다. 이는 초음파 처리에 따른 아연의 이온화 및 이리듐 재용해되어 나타난 결과로 판단된다. 초음파 장치를 교반기와 함께 사용한 조건에서 교반기만 사용한 동일 조건에 비해 27% 이상 이리듐 회수율이 증가함을 확인하였고, 99%의 이리듐 회수가 가능하였다(아연 40 당량, 초기 pH 0.01, 100 ml, 이리듐 초기 농도 1770 ppm, 60 min.).

This work investigated the cementation of iridium from iridium-containing hydrochloric acid leachate. Zinc powder was used as the reducing agent, and the effects of the stoichiometric ratio of Zn/Ir, initial Ir concentration, initial pH, reaction time, and ultrasound irradiation on iridium recovery were investigated. When only the stirrer was used for cementation, the iridium recovery increased with the addition amount of zinc, and the recovery of about 70% at 40 times the stoichiometric ratio of Zn/Ir. In contrast, when employing ultrasonic irradiation with stirring, the recovery of iridium decreased at 20 times or less the stoichiometric amount of zinc. The recovery of iridium increased at 40 times the stoichiometric ratio of Zn/Ir. This result may be due to the ionization of zinc and re-dissolution of iridium during the ultrasound irradiation treatment. When a combination of ultrasonic irradiation and stirring was used for cementation, the iridium recovery increased by more than 27% compared to that when using only the stirrer. It was possible to recover 99% of iridium under the following conditions: reaction time, 60 min; initial pH, 0.01; volume of leachate, 100 mL; 1770 ppm Ir, 40 times the stoichiometric ratio of Zn/Ir.

키워드

과제정보

이 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(20217510100080, 저품위 고상 복합자원의 자원순환 오픈 플랫폼 구축을 위한 희소금속 농축회수(처리량 200 kg/일) 원천기술개발).

참고문헌

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