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HWAHAK KONGHAK,
Vol.31, No.6, 852-857, 1993
Vol.31, No.6, 852-857, 1993
무연탄의 광학적 특성에 관한 연구
A Study on the Optical Characteristics of Anthracite Coals
국내탄 및 수입무연탄을 대상으로 maceral 및 vitrinite 반사율을 측정하였다. 또한 석탄의 화학적 특성과 광학적 특성의 상관성을 고찰하여 보았다. 국내탄 및 수입탄을 collinite와 vitrodetrinite의 vitrinite group과 semifusinite, fusinite 및 inertodetrinite의 inertinite group의 maceral로 구성되어 있는 것으로 분석되었다. 국내탄에서는 mi-crinite, graphinite, mottlite 및 impregnite의 존재 역시 확인되었다. 국내탄은 meta-anthracite의 석탄화도를 가지며, 수입탄은 anthracite의 석탄화도를 갖는 것으로 나타났다. Vitrinite group의 maceral이 증가할수록 휘발분 및 탄소량은 증가하였으며 inertinite group의 maceral이 증가할수록 휘발분 및 탄소량은 감소하였다. Vitrinite의 최대 반사율이 증가함에 따라 이방성도 증가하였으며, 탄소량 역시 증가하였다. 반면 휘발분 및 수소량은 감소하였다.
Maceral of coal and reflectance of vitrinite have been determined for the domestic and the imported coals. Also the relationship between chemical and optical properties of coal has been investigated. The maceral of coal samples is composed of both two varieties of collinite and vitrodetrinite in vitrinite group and three varieties of semifusinite, fusinite and inertodetrinite in inertinite group. Micrinite, gaphinite, mottlite and impregnite have been observed in the domestic coals. The degree of coalification for domestic coal is meta-anthracite and that of the imported coal is anthacite. As the macerals in vitrinite group is increased the amount of volatile matter and carbon increased. Also the amount of volatile matter and carbon decreased with increasing macerals in the inertinite group. As the maximum reflectance of vitrinite is increased both, the anisotropy and the carbon composition increased but, the volatile matter and hydrogen decreased.
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