Modifikace adiabatické metody ověřování náchylnosti uhlí k samovznícení pro podmínky OKR

Abstract

The adiabatic method for verification of susceptibility of coal to spontaneous combustion is a method widely used especially abroad. It was successfully used in OKR through VVUÚ, a.s. and currently it is still being offered by this company as “method of oxidation in adiabatic conditions.” By the year 2009, this method had been considered one of the basic methods for classification of susceptibility of coal to spontaneous combustion in OKR. In this work, the author follows foreign experience of modification of the adiabatic method according to the research institute INSEMEX in Romania and, moreover, he deals with the verification of the modification of the adiabatic method for OKR conditions and determination of classificatory scale. The modification is based on an increase of an initial temperature of laboratory test to 120°C. Within the dissertation thesis, there were analyzed a laboratory apparatus and 35 coal samples from OKR. Factors influencing the method and oxidation of coal samples were also verified (an influence of water content in a sample, granularity, inertization, influence of evaporation of oxygen mixture). The contribution of this thesis is widening of knowledge in the sector in OKR conditions and also the low time-consumption of the method.