한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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시멘트 클링커 원료로서 적용한 석탄재의 고온 미세구조 변화 고찰

A Study on Changes in High-Temperature Microstructure of Coal Ash Applied as Cement Clinker Raw Material

  • 유동우 (군산대학교 산학협력단) ;
  • 임영진 (건설소재 알앤디(주)) ;
  • 권성구 (군산대학교 신소재공학과) ;
  • 이석제 ((주)삼표시멘트 공정개선팀)
  • Yoo, Dong-Woo (Industry University Cooperation Foundation, Kunsan National University) ;
  • Im, Young-Jin (Construction Materials R&D Corporation) ;
  • Kwon, Sung-Ku (Department of Materials Science & Engieering, Kunsan National University) ;
  • Lee, Seok-Je (Manufacturing Technology, Sampyo Cement)
  • 투고 : 2022.08.11
  • 심사 : 2022.08.31
  • 발행 : 2022.09.30
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초록

석탄재는 시멘트 클링커의 실리카와 알루미나질 공급원으로서 활용이 고려되고 있다. 이러한 석탄재의 시멘트 클링커 소성과정에서 소성온도에 따른 고온 미세구조변화를 검토하여, 시멘트 클링커 소성에서 미치는 영향을 파악하고자 하였다. 시멘트 클링커의 원료로서 사용된 석탄재는 소성온도 950 ℃부터 입자 표면의 형상변화가 관찰되었으며, 1250 ℃ 이상의 소성온도에서 부터는 석탄재의 형상이 소멸되었다. 석탄재의 Al, Fe 성분은 1350 ℃ 이상의 온도에서는 시멘트 간극상으로 전환되는 되는 것을 확인하였다. 또한, 다량의 석탄재를 원료로 적용한 클링커는 1150~1200 ℃의 소성온도 구간에서 Lime의 함량이 낮고, Belite의 함량이 높게 나타나, 석탄재의 적용으로 초기 소성온도에서 칼슘실리케트 광물의 형성이 더 원활하게 진행되는 것을 확인하였다.

Coal ash is being considered as a source of silica and alumina for cement clinker. The purpose of this study was to investigate the effect on cement clinker sintering by confirming the high-temperature microstructural change according to the firing temperature in the cement clinker sintering process of coal ash. In the coal ash used as a raw material for cement clinker, the shape change of the particle surface was confirmed from the sintering tem perature of 950 ℃. The shape of the coal ash disappeared from the sintering temperature higher than 1250 ℃. It was confirmed that the Al and Fe components of the coal ash were converted to the cement interstitial phase at a temperature higher than 1350 ℃. In addition, the clinker using a large amount of coal ash as a raw material showed a low content of Lime and a high content of Belite in the sintering tem perature range of 1150~1200 ℃. From this, it was confirmed that the formation of calcium silicate mineral proceeds more easily at the initial sintering temperature by the application of coal ash.

키워드

과제정보

본 연구는 산업통상자원부 및 산업기술평가원(KEIT)의 연구비 지원으로 수행되었습니다. 이에 감사드립니다.

참고문헌

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