Fuels and Combustion
Low temperature carbonisation of coal produces

No by-products
Soft coke
Metallurgical coke
Very low calorific value coke oven gas

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Fuels and Combustion
The weathering index of a coal

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

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