한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제27권1호
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  • Pages.53-62
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  • 2014
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  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
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암모니아 용출용액을 이용한 저 품위 엽납석으로부터 Fe 제거 효율과 용해 동역학

The Efficiency of Fe Removal for Pyrophyllite by Ammonia Leaching Solution, and Their Dissolution Kinetics

  • 김봉주 (조선대학교 에너지.자원공학과) ;
  • 조강희 (조선대학교 에너지.자원공학과) ;
  • 최낙철 (서울대학교 지역시스템공학과) ;
  • 박천영 (조선대학교 에너지.자원공학과)
  • Kim, Bong-Ju (Dept. of Energy and Resource Engineering, Chosun University) ;
  • Cho, Kang-Hee (Dept. of Energy and Resource Engineering, Chosun University) ;
  • Choi, Nag-Choul (Dept. of Rural Systems Engineering/Research Institute for Agriculture and Life Science, Seoul National University) ;
  • Park, Cheon-Young (Dept. of Energy and Resource Engineering, Chosun University)
  • 투고 : 2013.12.18
  • 심사 : 2014.03.21
  • 발행 : 2014.03.31
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초록

저 품위 엽납석 광석에 포함된 불순물 Fe를 제거하기 위하여 입도크기, 황산농도, 황산암모늄농도, 과산화수소농도 그리고 온도변화에 따른 제거 효율에 대하여 연구하였다. 저 품위 엽납석 광석에서 자형의 입방체 황철석이 포함된 것을 반사현미경으로 관찰할 수 있었으며, X-선 회절분석결과 주 구성광물은 석영과 딕카이트였다. 실험 결과 Fe 용출율이 최대로 나타나는 입도 -325 mesh에서, 황산농도는 2.0 M에서, 황산암모늄 농도는 10.0 g/l, 과산화수소 농도 3.0 M 그리고 최적의 용출 온도는 $70^{\circ}C$에서였다. 용해 동역학 분석에서, Fe 용해는 황철석 표면에서 일어나며 화학적 반응에 통제되는 것으로 그리고 0.066/R, $[H_2SO_4]^{1.156}$, $[(NH_4)_2SO_4]^{0.745}$, $[H_2O_2]^{0.428}$에 비례하는 것으로 나타났다.

In order to remove Fe impurity from low-grade pyrophyllite ore, the effect of certain variables such as particle size, concentration of sulfuric acid, amount of ammonium sulfate, added hydrogen peroxide, and temperature were studied. The euhedral cubic pyrites were observed in the low-grade pyrophyllite ore by reflected light microscopy, and quartz and dickite were identified in the sample by XRD analysis. The results of the Fe removal experiments showed that the best Fe removal parameters were when the particle size was at -325 mesh, the addition of $H_2SO_4$, $(NH_4)_2SO_4$ and $H_2O_2$ was at a 2.0 M, 10.0 g/l, and 3.0 M concentration, respectively, and at a $70^{\circ}C$ leaching temperature. In the dissolution kinetics analysis, the dissolution of Fe from the pyrite surface was a controlled chemical reaction, and the Fe dissolution reaction was proportioned to 0.066/R, $[H_2SO_4]^{1.156}$, $[(NH_4)_2SO_4]^{0.745}$, $[H_2O_2]^{0.428}$.

키워드

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피인용 문헌

  1. The Characterization of Pyrophyllite Based Ceramic Reactive Media for Permeable Reactive Barriers vol.31, pp.4, 2018, https://doi.org/10.9727/jmsk.2018.31.4.227