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http://dx.doi.org/10.4191/kcers.2014.51.2.88

Mineral Phase and Microstructure Behaviors on Burning Condition of Domestic Low-grade Limestone  

Cho, Jin Sang (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Moon, Ki-Yeon (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Choi, Moon-Kwan (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Cho, Kye-Hong (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Ahn, Ji-Whan (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Yeon, Kyu-Seok (Department of Regional Infrastructure Engineering, Kangwon National University)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.2, 2014 , pp. 88-96 More about this Journal
Abstract
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.
Keywords
Calcination; Natural hydraulic lime; Low grade limestone; $C_2S$;
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