Composition, structure, and properties of coal from the 2.2 Ulug bed of the Elegestsk deposit in Ulug-Khemsk coal basin

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Coal from the 2.2 Ulug bed of the Elegestsk deposit in Ulug-Khemsk coal basin is investigated in terms of international quality certification. According to State Standard GOST 25543-88, the coal is of rank Zh and technological group 2Zh. The coal’s code according to the international system and State Standard GOST 30313-95 is 08 0 01 8 38 05 04 36. Attention is paid to the composition and structure of the coal, which are associated with elevated clinkering properties at high vitrinite reflectance, as well as maximum yield and fluidity of thermostable liquid products in the coal’s plastic mass. These features indicate that the coal’s organic mass contains considerable quantities of thermally unstable hydroaromatic and aliphatic structures. On account of the low oxygen content in the organic mass of coal from the Ulug bed, with high quantities of carbon and hydrogen, much of the hydrogen formed on thermal destruction reacts with the radicals formed, which prevents their polycondensation, and considerable quantities of relatively low-molecular liquid products of the plastic mass are produced. The mineral component is characterized by low content of silicon and aluminum oxides (51.65%) and relatively high content of iron oxide (15.96%) and calcium oxide (15.07%). Accordingly, the base/acid ratio Ib and basicity index Bb are high: 0.692 and 6.29, respectively. The Donets Basin has no counterparts of this coal. Coal from the 2.2 Ulug bed of the Elegestsk deposit in Ulug-Khemsk coal basin may be regarded as a valuable component of coal batch.