Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

All of these
Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)
Prevention of clinker formation in the oven
Controlling the dust nuisance while charging the coal

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Fuels and Combustion
Combustion of pulverised fuel

In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel
Requires larger combustion chamber than rich gaseous fuel
All of these
Suppresses the discharge of fine dust and grit into atmosphere

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Fuels and Combustion
A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

21% excess oxygen has been used for combustion
21% excess air has been used for combustion
Complete combustion of fuel has taken place
No excess air has been used for combustion

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Fuels and Combustion
Anthracite coal

Burns with short, bluish, yellow-tipped flame producing very little smoke
Is essentially a coking coal
Ignites more easily than bituminous coal
Contains more volatile matter than bituminous coal

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