Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Effect of Heat Treatment and Acid Leaching of Siliceous Mudstone on the Purity of Silica Precursors

실리카 전구물질 순도에 미치는 규질이암의 열처리 및 산 침출 조건의 영향

  • Cho, Kuk (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Chang, Han-Kwon (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Kil, Dae-Sup (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Suh, Yong-Jae (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Park, Jin-Ho (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Jang, Hee-Dong (Minerals and Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
  • 조국 (한국지질자원연구원 자원활용소재연구부) ;
  • 장한권 (한국지질자원연구원 자원활용소재연구부) ;
  • 길대섭 (한국지질자원연구원 자원활용소재연구부) ;
  • 서용재 (한국지질자원연구원 자원활용소재연구부) ;
  • 박진호 (한국지질자원연구원 자원활용소재연구부) ;
  • 장희동 (한국지질자원연구원 자원활용소재연구부)
  • Published : 2007.12.30
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Abstract

The effect of heat treatment and acid leaching of siliceous mudstone on the purity of silica precursors, such as sodium silicate and silicic acid, was studied. As well as the temperatures for the heat treatment of siliceous mudstone, the concentrations of hydrochloric acid and sulfuric acid were varied to achieve the highest content of silicon in the precursors while minimizing energy and chemical consumption. It was found that the optimum conditions were achieved at the heat treatment temperature of $600^{\circ}C$ and hydrochloric acid of 1.56 M. The relative concentrations of silicon in the synthesized sodium silicate and silicic acid were as high as 99.2 and 99.5%, respectively.

규질이암의 열처리 및 산 침출이 소듐 실리케이트나 규산 수용액과 같은 실리카 전구물질 순도에 미치는 영향을 연구하였다. 규질이암의 열처리 온도, 산 침출시 염산 농도 및 황산 농도를 변화시키며 전구물질 내에 실리콘 함량을 최대한 높이면서 에너지 및 화학약품의 소모는 최소화하는 조건을 구하였다. 열처리는 $600^{\circ}C$, 산 침출은 1.56 M의 염산만 사용하였을 경우 최적이었다. 소듐 실리케이트와 규산 수용액의 실리콘 순도는 각각 최대 99.2%와 99.5%였다.

Keywords

References

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