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Experiments show that the oxidation of bituminous coal from the Zasyadko mine at 60°C in laboratory conditions increases its expansion pressure from 5.2 to 30.0 kPa for 28.3 days. Oxidation occurs in several stages, as already demonstrated for Ukrainian and imported coals at different metamorphic stages when oxidation was performed in the laboratory and in industrial trials at other temperatures....
Present investigation deals with an analysis of results of the study on natural coal oxidation in open piles both in winter and in summer period at different Ukrainian coke plants. The present work was performed considering previous results of artificial coal oxidation of different metamorphism stages in laboratory, conditions. The aim of the work is to demonstrate the necessity of permissible coal...
The influence of oxidation on the packing density of coal is considered. The packing density of coal concentrates is found to considerably exceed the standardized values. It may be more than 1.0 t/m3. That leads to overfilling and possible destruction of the silos in the clos towers of the coke batteries. Mathematical analysis of experimental data shows that the elevated packing density is due to...
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