Fuels and Combustion
Combustion of pulverised coal as compared to that of lump coal

Develops a low temperature flame
Provides a lower rate of heat release
Develops a non-luminous flame
Can be done with less excess air

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Fuels and Combustion
The weathering index of a coal

Is a measure of its size stability, when stored & exposed to weather
Is related to its calorific value
Gives an idea of the fusion temperature of ash
Is a measure of its caking tendency

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