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Chemistry for Sustainable Development

2016 year, number 3

Investigation of Caking Properties of Coking Coal

1Institute of Coal Chemistry and Material Science, Federal Research Centre of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Sovetskiy Pr.18, Kemerovo 650000
2Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090
Keywords: каменные угли, элементный состав, спекаемость, индекс свободного вспучивания, пластометрия, толщина пластического слоя, black coal, elemental composition, caking capacity, free swelling index, plastometry, thickness of the plastic layer


Caking properties of 22 black coal samples were studied for the purpose of determining a connection between the free swelling index SI and the stage of coal metamorphism (Ro.r). It was established that SI changes in the sequence of metamorphism of coal samples under study along a curve with the maximum in the region of Ro.r = 0.81-1.00 %. It was shown that SI increases linearly with an increase in the thickness of the plastic layer within the range у = 4-22 mm. The obtained correlation equation can be used to determine the calculated values of the free swelling index SI for coal with у < 22 mm.