Fuels and Combustion
Gross and net calorific value of a fuel will be the same

Ifits carbon content is very low
If its hydrogen/hydrogen compound content is zero
Under no circumstances
If its ash content is zero

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Fuels and Combustion
Anthracite can be used for

Making carbon electrodes
All of these
Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
Recarbonising steel

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