Fuels and Combustion
Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the

Coke oven battery heating
Mixing with blast furnace gas
Steel ladle drying
Hot scarfing of steel slabs

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Fuels and Combustion
Fixed carbon in coal is defined as

The one which is present in the residue after combustion
The total quantity of carbon present in the coal
Hundred minus the percentage of volatile matter, ash and moisture
That present in volatile matters

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