한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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석탄재의 함량변화가 시멘트 클링커의 소성성 및 상변화에 미치는 영향

Effect of Change in Coal Ash Content on Sinterability and Phase Change of Cement Clinker

  • 유동우 (군산대학교 산학협력단) ;
  • 임영진 (건설소재 알앤디(주)) ;
  • 최상민 (군산대학교 신소재공학과) ;
  • 권성구 (군산대학교 신소재공학과) ;
  • 이석제 ((주)삼표시멘트 공정개선팀)
  • Dong-Woo Yoo (Industry University Cooperation Foundation, Kunsan National University) ;
  • Young-Jin Im (Construction Materials R&D Corporation) ;
  • Sang-Min Choi (Department of Materials Science & Engieering, Kunsan National University) ;
  • Sung-Ku Kwon (Department of Materials Science & Engieering, Kunsan National University) ;
  • Seok-Je Lee (Manufacturing Technology, Sampyo Cement)
  • 투고 : 2022.12.02
  • 심사 : 2022.12.13
  • 발행 : 2023.03.30
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초록

미연탄을 사용하는 화력발전소에서 발생되는 석탄재는 Si, Al, Fe 성분을 포함하고 있으며, 이들 성분은 시멘트 클링커에 제조에 필요한 주요성분이다. 특히 Al, Fe 성분은 시멘트 클링커의 간극상을 형성하는 성분으로 시멘트 클링커의 소성에 중요한 영향을 미친다. 본 연구에서는 시멘트 클링커의 원료로서 다량의 석탄재를 함량별로 적용하여, 석탄재를 적용한 시멘트 클링커의 소성온도별 광물형성 과정을 확인하고자 하였다. 석탄재를 다량 적용한 시멘트 클링커는 1050~1150 ℃의 소성온도 구간에서 중간상이 생성되는 것을 확인하였고, 이는 석탄재의 함량이 증가할수록 생성량이 증가하였다. 석탄재의 첨가로 생성된 상은 1350 ℃ 이상에서 칼슘실리케아트상과 간극상으로 전환되어 소멸되는 것으로 예상된다. 시멘트 클링커의 일반적인 소성온도인 1450 ℃에서는 다량의 석탄재를 적용한 시멘트 클링커는 순수원료를 사용하여 제조한 기준 시멘트 클링커와 동등수준의 잘 발달된 광물을 형성하였다.

Coal ash generated from thermal power plants using briquettes contains Si, Al, and Fe components. These components are the main components required for the manufacture of cement clinker. In particular, Al and Fe components form the interstitial phase of cement clinker and have an important effect on the sintering of cement clinker. In this study, a large amount of coal ash was applied as a raw material for cement clinker by content, and the mineral formation process of cement clinker to which coal ash was applied was confirmed by sintering temperature. It was confirmed that the intermediate phase was generated in the sintering temperature range of 1050 ~ 1150 ℃ in the cement clinker to which a large amount of coal ash was applied. As the content of coal ash increased, the production amount of the intermediate phase increased. The phase produced by the addition of coal ash is expected to be converted to calcium silicate phase and interstitial phase and disappear above 1350 ℃. The cement clinker applied with a large amount of coal ash at 1450 ℃ formed well-developed minerals equivalent to the standard cement clinker.

키워드

과제정보

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

참고문헌

  1. Ahn, J.W., Kim, H.S., Cho, J.S., Han, G.C., Han, K.S., Kim, H. (2003). Manufacture of ordinary Portland cement clinker using cement paste of the weste concrete, Journal of The Korean Ceramic Society, 40(8), 804-810 [in Korean]. https://doi.org/10.4191/KCERS.2003.40.8.804
  2. Aranda, M.A., De la Torre, A.G., Leon-Reina, L. (2012). Rietveld quantitative phase analysis of OPC clinkers, cements and hydration products, Reviews in Mineralogy and Geochemistry, 74(1), 169-209. https://doi.org/10.2138/rmg.2012.74.5
  3. Jang, B.G., Jeong, C.J., Lee, J.H., Im, Y.M. (1998). Cement Material Chemistry, 2nd Edition, Chonnam National University Press, 145-154 [in Korean].
  4. Kaminskas, R., Kubiliute, R. (2010). The effect of coal ash on synthesis and properties of tricalcium silicate, Materials Science (Medziagotyra), 16(3), 73-79.
  5. Komljenovic, M., Petrasinovic-Stojkanovic, L., Bascarevic, Z., Jovanovic, N., Rosic, A. (2009). Fly ash as the potential raw mixture component for Portland cement clinker synthesis, Journal of Thermal Analysis and Calorimetry, 96(2), 363-368. https://doi.org/10.1007/s10973-008-8951-0
  6. Kwak, B.H. (1995). A study on the use of fly ash as an sub-material of clinker, Korea Cement Association, 23, 75-77 [in Korean].
  7. Lea, F.M. (1970). The Chemistry of Cem & Concr, Third edition, Chemical Publishing Company, Inc., 158-176.
  8. Lee, S.H., Kim, W.K. (2018). Portland cement manufacturing process and clinker formation mechanism, Magazine of Korea Concrete Institute, 30(3), 22-26 [in Korean].
  9. Lee, S.H., Lee, S.J., Woo, Y.Y., Park, J.S. (2014). Properties of Portland cement clinker using polysilicon sludge, Journal of the Korean Recycled Construction Resources Institute, 2(4), 328-333 [in Korean]. https://doi.org/10.14190/JRCR.2014.2.4.328
  10. Lee, Y.C., Lee, S.Y., Min, K.S., Lee, C.H., Park, T.G., Yoo, D.W. (2022). The utilization of domestic fly ash as a cement raw material, Korean Journal of Materials Research. 32(1), 23-29 [in Korean]. https://doi.org/10.3740/MRSK.2022.32.1.23
  11. Marroccoli, M., Pace, M.L., Telesca, A., Valenti, G.L., Montagnaro, F. (2010). Utilization of coal combustion ashes for the synthesis of ordinary and special cements, Combustion Science and Technology, 182(4-6), 588-599. https://doi.org/10.1080/00102200903466210
  12. Yoo, D.W., Im, Y.J., Choi, S.M., Lee, C.H. (2021). A study on the phase change and microstructure change according to the sintering temperature of cement clinker applied with coal ash, Journal of the Korean Recycled Construction Resources Institute, 9(4), 553-560 [in Korean].
  13. Yoo, D.W., Im, Y.J., Kwon, S.K., Lee, S.J. (2022). A study on changes in high-temperature microstructure of coal ash applied as cement clinker raw material, Journal of the Korean Recycled Construction Resources Institute, 10(3), 211-218 [in Korean].
  14. Yoo, D.W., Im, Y.J., Park, T.G., Lee, C.H. (2020). Quantitative analysis of rietveld method minerals by sintering temperature of cement clinkers with fly ash, Journal of the Korean Recycled Construction Resources Institute, 8(4), 514-519 [in Korean].