Geochemical and Physical Properties of the Jangseong and Imported Chinese Coals

장성탄광 석탄과 수입 중국 석탄의 지구화학적 및 물리적 특성

  • Chon, Hyo Taek (Department of Mineral and Petroleum Engineering, Seoul National University) ;
  • Kim, Myeong Kyun (Department of Mineral and Mining Eng., Chongju Univ.)
  • 전효택 (서울대학교 자원공학과) ;
  • 김명균 (청주대학교 자원공학과)
  • Received : 1995.07.18
  • Published : 1995.08.31


The petrographic, geochemical, and physical properties of the Jangseong and Chinese coals were investigated. The most common mineral matters of Jangseong coal are kaolinite, muscovite, sericite, illite, quartz and pyrophyllite. Mineral matters in Chinese coal are mainly composed of quartz, calcite, dolomite and kaolinite. Jangseong coal ash has higher content of $Al_2O_3$, $K_2O$, $TiO_2$, As, Rb and V, and lower content of CaO, MgO, $Na_2O$, $Fe_2O_3$ and $P_2O_5$ than those of Chinese coal ash. The liquid limit and the plasticity index of Jangseong coal were compared with those of Chinese coal. The result shows that the briquetting ability of Jangseong coal is a little bit better than that of Chinese coal. The briquetting ability is found to be principally dependent on the type and the content of mineral matter in coal, especially clay mineral.