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J. Korean Ceram. Soc. > Volume 51(2); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(2): 88.
doi: https://doi.org/10.4191/kcers.2014.51.2.88
국내 저품위 석회석의 소성조건에 따른 광물상 및 미세구조 거동
조진상, 문기연, 최문관, 조계홍, 안지환1, 연규석2
한국석회석신소재연구소 연구개발실
1한국지질자원연구원 광물자원본부
2강원대학교 지역건설공학과
Mineral Phase and Microstructure Behaviors on Burning Condition of Domestic Low-grade Limestone
Jin Sang Cho, Ki-Yeon Moon, Moon-Kwan Choi, Kye-Hong Cho, Ji-Whan Ahn1, Kyu-Seok Yeon2
Department of Research and Development, Korea Institute of Limestone and Advanced Materials
1Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources
2Department of Regional Infrastructure Engineering, Kangwon National University
Natural hydraulic lime (NHL) is produced by burning a form of low-grade limestone containing silica and alumina which, above certain temperatures, combine with calcium oxide. The resulting silicates and aluminates impart hydraulic properties to the product. This study aims to determine the calcined characteristics of NHL using domestic low-grade limestone with maximized hydraulic properties. Six types of low-grade limestone containing $SiO_2$ were selected and experiments were carried out with different burning temperatures and holding times. The burning temperature and holding time as the most suitable burning conditions were $1,200^{circ}C$ to $1,300^{circ}C$ and 3 to 7 h, respectively, for the manufacturing of NHL from domestic low-grade limestone. These results demonstrate the feasibility of NHL using domestic low-grade limestone to produce NHL.
Key words: Calcination, Natural hydraulic lime, Low grade limestone, $C_2S$
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