E.P. Dik, A.N. Soboleva, OAO «VTI»

The mineral part of coals with acid ash is approaching in its composition to the sedimentary rocks of Earth crust, which create the habitat for flora and fauna. Therefore the ash-and-slag waste after combustion of such coals must not be very hazardous both for environment and human health. It was established that the insignificant excess of potentially dangerous small elements in comparison with their content in sedimentary rock will not place in the TPP ash and slag in the category more hazardous for environment than in sedimentary rocks. Therefore the overwhelming majority of such ash and slag relates to the 5th class, i.e. to the practically safe waste.

The TPP ash-and-slag waste is classified abroad as not hazardous that is reflected in the main EU normative documents.