Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

Physical properties, chemical compositions and powder characteristics of the limestones from two well-known limestone deposits, the Pungchon Formation, Kangwon-do and the Gabsan Formation, Chungchong-buk-do, has been evaluated for the effective utilization of domestic limestone resources. The limestones from the Pungchon Formations (the Pungchon limestones) were relatively coarser and whiter than the limestones from the Gabsan Formations (the Gabsan limestones). All limestone samples had chemical compositions suitable as raw materials or ingredients for cement, glass, steel and copper refinery. After being ground with various durations, regardless of their initial sizes, the Gabsan limestones of massive texture showed irregular trends of particle size distribution different from those of the Pungchon limestones. But in long-run grinding times, size distributions and whiteness indices for both limestones became similar. With increasing the proportions of fine-grained powders, whiteness indices for the Pungchon limestones increased higher but those for the Gabsan limestones decreased reversely, which can be regarded as the effects of cryptocrystalline siderites in consideration of rock colors and Fe2O3(T) contents.