Author:
Winarno Agus,Hendra Amijaya D.,Harijoko Agung
Abstract
Abstract
This study aims to determine the type of mineral and geochemical character of low rank coal. The coal samples were located at Indominco Mandiri Coal Mine KW 01PB0435 in East Kutai District, East Kalimantan. This area of research is entered into the Lower Kutai Basin, where in this basin there are two formations containing coal, namely Pulaubalang and Balikpapan Formation. The methods used are X-Ray Diffraction (XRD), proximate, and ultimate coal analysis. The results of this study based on X-Ray Diffraction (XRD) analysis of coal contents are clays minerals (kaolinite, illite), quartz, carbonates (calcite and dolomite), sulphides (pyrite and chalcopyrite) and oxides (rutile and goethite). While geochemically coal has a calorific value of 6052.6 cal./gr. (Subbitumionus A Coal), moisture 13.3% (adb), ash 4.0% (adb), volatile matter 41.5% (adb), fixed carbon 41.2% (adb), and sulfur content 1.77% (adb).
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