Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Hydration Characteristics of Coal-Fly Ash Containing High CaO Compound

CaO 화합물이 다량 함유된 비산재의 수화 특성에 관한 연구

  • Sim, Jun-Soo (Department of Advanced Material Science and Engineering, Kyonggi University) ;
  • Lee, Ki-Gang (Department of Advanced Material Science and Engineering, Kyonggi University) ;
  • Kim, Yu-Taek (Department of Advanced Material Science and Engineering, Kyonggi University) ;
  • Kang, Seung-Ku (Department of Advanced Material Science and Engineering, Kyonggi University)
  • 심준수 (경기대학교 신소재공학과) ;
  • 이기강 (경기대학교 신소재공학과) ;
  • 김유택 (경기대학교 신소재공학과) ;
  • 강승구 (경기대학교 신소재공학과)
  • Received : 2012.02.29
  • Accepted : 2012.03.27
  • Published : 2012.03.31
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Abstract

The purpose of this study was to examine a possibility that fly ash could be used as raw material for carbonation by conducting the experiment on magnetic separation and hydration of fly ash that contained a large amount of CaO composite. Wet magnetic separation experiment was performed to remove the component of magnetic substance that contained fly ash, which aimed at increasing the content of CaO in the non-magnetic domain. The selected fly ash was used for hydration experiment before the TG-DTA, XRF and XRD analyses were made to confirm the Ca component that could be carbonated. Then, the fly ash was turned to a hydrate that was favorable to dissociation of $Ca^{2+}$ ion. As a result, the magnetic separation enabled detecting the content of CaO component by up to 61 wt% in the non-magnetic domain. Since the hydrate was confirmed, it is believed that the fly ash can be used as raw material for carbonation.

Keywords

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