Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Leaching Behavior of Nickel from Waste Multi-Layer Ceramic Capacitor

폐(廢) 적층형(積層形)세라믹콘덴서에 함유(含有)된 니켈의 침출거동(浸出擧動)

  • Kim, Eun-Young (Department of Resources Recycling, University of Science & Technology) ;
  • Kim, Byung-Su (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Kim, Min-Seuk (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Jeong, Jin-Ki (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Lee, Jae-Chun (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
  • 김은영 (과학기술연합대학원대학교 폐자원활용) ;
  • 김병수 (한국지질자원연구원, 자원활용소재연구부) ;
  • 김민석 (한국지질자원연구원, 자원활용소재연구부) ;
  • 정진기 (한국지질자원연구원, 자원활용소재연구부) ;
  • 이재천 (한국지질자원연구원, 자원활용소재연구부)
  • Published : 2005.10.30
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Abstract

Leaching behavior of nickel contained in waste Multi-Layer Ceramic Capacitor (MLCC) was investigated using a batch reactor. The effects of acid type, acid concentration, leaching temperature, particle size, and reaction time on the extraction of nickel metal from waste MLCC were examined. As a result, 97% of nickel contained in waste MLCC was leached out in 30 min at the temperature of $90^{\circ}C$ under the condition of $HNO_3$ concentration 1N, solid/liquid ratio 5 g/L and particle size $-300/+180{\mu}m$. It was also found that a Jander equation was useful to fit well the leaching rate data. The rate of nickel leaching is controlled by pore diffusion in $BaTiO_3$ layer and has an activation energy of 37.6 kJ/mol (9.0 kcal/mol).

폐 적층형세라믹콘덴서(Multi-Layer Ceramic Capacitor, MLCC)에 함유된 니켈의 침출거동에 대한 연구를 수행하였다. 침출제인산의 종류와 산농도, 침출온도, 입자크기, 침출시간이 니켈의 침출거동에 미치는 영향을 조사하였다. 실험결과, 광액농도 5g/L, 질산농도 1N 침출온도 $90^{\circ}C$, 시료입도 $-300/+180{\mu}m$, 침출시간 30분에서 니켈의 침출율은 97%이었다. 니켈의 침출반응속도는 cylinder 형상의 Jander 식에 잘 따르는 것으로 분석되었다. 니켈의 침출반응은 잔류 $BaTiO_3$ 공극 확산율속반응이며, 활성화 에너지는 37.6kJ/mol(9.0 kcal/mol)이였다.

Keywords

References

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