비탄산염 원료를 사용한 시멘트 혼합원료 및 클링커 특성
Characteristics of Cement Raw Mix and Clinker used Non-Carbonated Materials
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시멘트산업은 다량의 온실가스를 배출하고 있으며, 이중 석회석 기인 온실가스가 약 65%를 차지하고 있다. 따라서 본 연구에서는 석회석 대체를 위해 비탄산 CaO 원료를 검토하였다. 특히 제철·제강 부산물 중 CaO 함량이 많은 고로 괴재 슬래그, 전로 슬래그 및 KR 슬래그를 사용하였다. 클링커 제조를 위해 LSF, SM, IM은 각각 92, 2.5, 1.6으로 제어하였으며, CaCO3 대체율은 3%, 6%, 9% 및 12%로 고정하였다. 혼합원료 배합설계 시 고로 괴재 슬래그 사용 조건에서는 CaCO3 대체율이 12%까지 가능하였으나, 전로 슬래그는 3%, KR 슬래그는 9%까지 가능하였다. 클링커의 소성성은 고로 괴재 슬래그 및 KR 슬래그 사용 시 좀 더 양호하였다. 고로 괴재 슬래그 사용 클링커의 XRD 피크 강도는 슬래그 사용량 증가에 따라 점차 감소하였으나, KR 슬래그 사용 시에는 XRD 피크 강도가 오히려 증가하였다. 이는KR 슬래그의 CaO가 비탄산 성분으로 고함량이며, 이미 C2S를 함유하여 클링커 광물 생성이 좀 더 용이해지기 때문으로 사료되었다.
Abstract
The cement industry emits a large amount of GHGs (greenhouse gases) and about 65% of GHGs is originated from limestone. So non-carbonated CaO materials were examined to replace limestone in this study. It was attempt to replace limestone by used blast furnace slag, converter slag, and KR slag with high CaO content. For manufacture clinker, LSF, SM, and IM were controlled at 92, 2.5, and 1.6, respectively, and the CaCO3 replacement rate was fixed at 3%, 6%, 9%, and 12%. As using blast furnace slag, the CaCO3 replacement rate was possible up to 12%, but for converter slag and KR slag, up to 3% and 9% were possible. The burnability of clinker was better when blast furnace slag and KR slag were used. The XRD peak intensity of clinker used blast furnace slag gradually decreased as the amount of slag used increased, but when KR slag was used, the XRD peak intensity actually increased. It was presumed to be because KR slag has a high CaO content and already contains C2S, making it easier to produce clinker minerals.
참고문헌 (16)
- Decarbonizing steel, Technologies and Costs, Climate Technology Brief, "National Climate Technology Center", KIER, 2~5 (2021)
- S. H. Cho, "Core Technology for 2050Carbon Neutrality in the Cement Manufacturing Process", KCI, 34(1), pp.72~79 (2022)
- S. H. Song, "Core Technology for 2050Carbon Neutrality in the Cement Material Industry", KCI, 34(1), pp.66~71 (2022)
- J. H. Kim, "Green New Deal in the Cement Industry", Spring Conference, KOSECC, pp.28~ (2021)
- Performance of Concrete Pavement Incorporating Air- and Water-Cooled Slag, "S. H. Park", KSCE, 1045~1046 (2020)
- Jawad Ahmad, "A Comprehensive Review on the Ground Granulated Blast Furnace Slag (GGBS) in Concrete Production", Sustainability (2022)
- Ren Bo, "Correlation between chemical composition and alkali attack resistance of bauxite-SiC refractories in cement rotary kiln", Ceramics International, 43(16), pp.14161~14167 (2017)
- A Study on the Effects of Reclaiming - Fuel in Cement Kiln, "J. H. Lee", KICT, ~ (1996)
- Industrial Standards Deliberation Committee, "Fly ash, KS L 5405", pp.15~16 (2018), Korean Standards & Certification
- Tianming Gao, "Benefits of using steel slag in cement clinker production for environ"mental conservation and economic revenue generation", Journal of Cleaner Production, 282(1), pp.1~11 (2021)
- 김태연, "염소 함유 클링커의 소성성 및 광물특성에 관한 연구", 자원리싸이클링, 29(6), pp.48~56 (2020), 한국자원리싸이클링학회[DOI]
- Joseph O Odigure, "Grindability of cement clinker from raw mix containing metallic particles", Cement and Concrete Research, 29(3), pp.303~307 (1999)
- Paul Stutzman, "Uncertainty in Bogue"calculated phase composition of hydraulic cements", Cement and Concrete Research, 61, pp.40~48 (2014)
- Hao Zhou, "Research on structure modulation of alite and its effect on the mechanical properties of cement clinker", Construction and Building Materials, 303, pp.1~13 (2021)
- Lei Shen, "Benefits of using steel slag in cement clinker production for environmental conservation and economic revenue generation", Journal of Cleaner Production, 282, pp.1~11 (2021)
- F. M. Lea, "The chemistry of cement and concrete", pp.64~81 (1971), Chemical Publishing Company