black lignite

black lignite

[′blak ′lig‚nīt]
(geology)
A lignite with a fixed carbon content of 35-60% and a total carbon content of 73.6-76.2% that contains between 6300 and 8300 Btu per pound; higher in rank than brown lignite. Also known as lignite A.
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Russia has been historically the primary destination for Kazakhstans coal (81% of all coal exported in 2016), primarily black lignite from the Ekibastuz basin supplied to the Urals power plants.