The present paper is the first proposal of genetic-industrial classification of brown coals in Serbia. The analysed brown coals derive from different lithostratigraphic units, mostly of Miocene age. Classification-codification of Serbian low rank coals were studied from petrological, chemical and technological point of view. Most of these characteristics were included as parameters of the codification system for low rank coals (1, 2, 3). The proposed classification scheme for Serbian brown coals is based on different parameters determined by microscopic and technological or chemical techniques. The proposed classification comprise three groups of parameters, selected according to their basic characteristics. The genetic parameters, the mean random reflectance of huminite/vitrinite and volatile matter content are used to determine the degree of coalification. The petro-graphic composition (huminite, liptinite and inertinite) determines the type of coal (pet-rographic parameter; mmf). Diessefs Gelification Index (GI) and Tissue Preservation Index (TPI), controlled by the deposition systems, are used to characterise properties of coal seams. Rank and type of coal have important influence on technological properties of coals; they are not sufficient to determine the behaviour of this coal under specific conditions of utilization. Application of organic geochemistry, particularly using biomarkers in paleoenvironments reconstruction, have contributed to the better knowledge of brown coals genesis. Supplementary parameters, according to international standards, are chosen to qualify the different technological classes of those coals.
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