Home – Home – Jornals – Chemistry for Sustainable Development 2020 number 6

Statistical analysis of the material according to the composition of ash-forming elements in coal from the Kaa-Khem deposit ( n = 43) including the data previously obtained by other researchers was carried out. The study samples of coal have a low ash content on average (ash content A^d is 11.8 %), with a relatively high content of CaO (17.4 mass %) and Fe₂O₃ (16.6 mass %). Regression analysis of the data by means of the least-squares allowed us to reveal correlations between ash content and the content of elements. The dependences of the element’s contents in coal [E _i ] and ash [E _i ]^A were estimated over a broad range of ash content values A^d (3-51 %). The types of diagrams for Si, Al, Ti, K, Na differ from those for Fe, Ca, Mg, S. It is demonstrated that the main carriers for Si, Al, Ti, K, Na in the studied coals are mineral inclusions of allothigenic origin. The authigenic mineral formations of coals contain mainly the carriers of Fe, Ca, Mg, S.