Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Precipitation of Cu as the sulphide from Sulphate solution containing Cu, Ni and Co

구리, 니켈, 코발트 혼합용액으로부터 침전법에 의한 구리의 분리

  • Park Kyung-Ho (Korea Institute of Geoscience Mineral Resources, Minerals and Materials Processing Division) ;
  • Jung Sun-Hee (Korea Institute of Geoscience Mineral Resources, Minerals and Materials Processing Division) ;
  • Park Jin-Tae (Korea Institute of Geoscience Mineral Resources, Minerals and Materials Processing Division) ;
  • Nam Chul-Woo (Korea Institute of Geoscience Mineral Resources, Minerals and Materials Processing Division) ;
  • Kim Hong-In (Korea Institute of Geoscience Mineral Resources, Minerals and Materials Processing Division)
  • 박경호 (한국지질자원연구원 자원활용소재연구부) ;
  • 정선희 (한국지질자원연구원 자원활용소재연구부) ;
  • 박진태 (한국지질자원연구원 자원활용소재연구부) ;
  • 남철우 (한국지질자원연구원 자원활용소재연구부) ;
  • 김홍인 (한국지질자원연구원 자원활용소재연구부)
  • Published : 2005.12.01
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Abstract

The selective sulphide precipitation of copper from sulphate solution containing nickel and cobalt was studied with adding $Na_{2}S$ solution. Precipitation efficiency of copper increased with raising pH of solution and increasing the amount of $Na_{2}S$ added and lowing its concentration. The increase in reaction time and temperature also improved the precipitation of copper. However, attempts to selectively precipitate copper met with limited success because of co-precipitation of nickel and cobalt. With adding $20\%$ $Na_{2}S$, 3 times equivalent of Cu, at pH 1.0 of solution, $25^{\circ}C$ and 30 minutes of reaction time, precipitation efficiencies of copper, nickel and cobalt were $94.1\%$, $4.3\%$ and $4.5\%$ respectively.

구리, 니켈 그리고 코발트를 함유한 용액으로부터 구리를 선택적으로 분리하기 위하여 $Na_{2}S$를 첨가하여 구리를 CuS로 침전시키는 연구를 행하였다. 구리의 침전율은 용액의 pH가 높을수록, 첨가한 $Na_{2}S$의 양이 많을수록,농도가 낮을수록, 반응온도와 반응시간이 증가할수록 증가하였다. pH 1, $20\%\;Na_{2}S$ 첨가량이 구리의 3 당량비, 온도 $25^{\circ}C$ 그리고 반응시간 30분에서 구리의 침전율은 $94.1\%$이었으며 니켈과 코발트도 각각 $4.3\%$와 $4.5\%$가 침전되었다. 즉 일부 니켈과 코발트 이온이 같이 공침되기 때문에 정량적으로 구리만을 침전, 분리하는 것은 가능하지 않았다.

Keywords

References

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