Fuels and Combustion
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in

Large heaps with small surface to volume ratio
Closed space without any ventilation facility
Fine sizes without the presence of any lump
Shallow and small piles

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Fuels and Combustion
Fussain

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation
Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal
All of these
Is friable, charcoal like substance

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