Fuels and Combustion
Coal is pulverised before burning in large capacity boiler furnaces mainly to

Ensure its complete combustion
Provide trouble free operation
Facilitate easy ash removal
Enhance its calorific value

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Fuels and Combustion
Froth floatation is used for

Washing lump coal (> 80 mm size)
Washing fine coal dust (< 0.5 mm size)
All of these
Removing ash from the coal based on difference in specific gravity of coal and ash

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Fuels and Combustion
Anthracite can be used for

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

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