Fuels and Combustion
Combustion of pulverised coal compared to the lumpy coal

Facilitates combustion with lower excess air
Provides better control of furnace temperature
All of these
Provides higher thermal efficiency & flame temperature

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Fuels and Combustion
The weathering index of a coal

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

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