Fuels and Combustion
During combustion of gaseous fuels, deficiency of air

Does not affect the flame length
Increases the flame temperature
Lengthens the flame
Tends to shorten the flame

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Fuels and Combustion
Anthracite can be used for

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

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