White coal

Formation

White coal is a form of fuel produced by drying chopped wood over a fire. It differs from charcoal which is carbonised wood. White coal was used in England to smelt lead ore from the mid-sixteenth to the late seventeenth centuries.

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Early uses as fuel

It produces more heat than green wood but less than charcoal and thus prevents the lead evaporating.[1] White coal could be used mixed with charcoal for other industrial uses than lead smelting.

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Coking coal and use of coke

White coal was produced in distinctive circular pits with a channel, known as Q-pits. They are frequently found in the woods of South.

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Refined coal

India is fast becoming a major manufacturer and consumer of white coal. A large number of companies have switched their boiler fuels to use white coal instead of fossil fuels. White Coal manufacturing capacity is coming up in droves in the state of Gujarat, Maharashtra, Tamil Nadu and Rajasthan.

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Production of chemicals

Moisture content is nil.Biomass briquettes have a higher practical thermal value.

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Environmental effects

Briquettes have consistent quality, have high burning efficiency, and are ideally sized for complete combustion. Combustion is more uniform compared to coal and boiler response to changes in steam requirements is faster, due to higher quantity of volatile matter in briquettes.

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