Home – Home – Jornals – Chemistry for Sustainable Development 2009 number 5

Thermooxidative destruction and combustion in the flare of fine coal obtained by mechanochemical treatment in high-energy activator mills of different types are studied. Activation in mills leads to a decrease in particle size, enhancement of the reactivity of fine coal, and accelerates coal combustion in flare. The effect of combustion acceleration is essentially dependent on the type of mechanical treatment. In the case of the close particle size distribution, activation under the free shock conditions is more efficient: the flare turns out to be close to the flare of gas fuel. In comparison with coal obtained under the conditions of restricted shock, fine coal obtained under free shock conditions burnt immediately after preparation is characterized by higher (by 20 %) rate of oxidation under non-isothermal conditions, while the maximal process temperature changes from 560 to 780 ^оC. The effect has a reversible character; it remains essential for the interaction of coal particles with oxygen of the air under non-isothermal conditions for 2 h.