Fuels and Combustion
Bright coal

Contains mainly vitrain & clarain and is generally coking
Contains more than 90% durain
Is non-coking
Contains more than 90% fussain

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Fuels and Combustion
Low temperature carbonisation

Produces less quantity of tar than high temperature carbonisation
Produces higher quantity of gas than high temperature carbonisation
Is meant for the production of 'metallurgical coke'
Is mainly for producing the smokeless domestic coke

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