Evaluation of Argillaceous Overburden Dumps of Coal Mining as a Source of Ceramics Production
B. K. Karasal1,2, T. V. Sapelkina2, A. A. Chylbak1, I. D. Karasal3
1Tuvan State University, Kyzyl, Russia
2Tuvinian Institute for Exploration of Natural Resources, Siberian Branch, Russian Academy of Sciences, Kyzyl, Russia
3Center for Biosphere Research of the Republic of Tuva, Kyzyl, Russia
Keywords: Overburden, argillite, mining method, composition, dispersivity, grindability, properties, ceramics
Abstract
With a view to estimating applicability of overburden rocks of coal mining as a source of ceramics production, their quality indicators, including mineralogical and chemical compositions, hardness and dispersivity, as well as the content of components causing destructive processes and toxic gases, are analyzed. It is found that argillaceous overburden rocks experience softening and fine decomposition in dumps, which makes them better prepared for the further processing. The mineralogical and chemical compositions of argillaceous overburden is typical of natural clay. Argillaceous rocks ground to < 0.63 mm and wetted pass to a moderately plastic mass which allows shaping work pieces without defects. Baking of argillaceous rocks starts at a temperature over 900 °C, which enables manufacturing walling ceramic materials with the properties as per State Standard GOST 530-2012.
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