Coal rank is described as theclassification of coals according to their degree of progressive alteration from lignite to anthracite.
In the United States, the standard ranks of coal include lignite, subbituminous coal, bituminous coal, and anthracite and are based on fixed carbon, volatile matter, heating value, and agglomerating (or caking) propertiesQuelle: Gloria Buenavista - 122742/2006-10-01
Other Database Pages Exist for this Phrase:
Classification (Classification is a term that can refer to:
1. ...)
Coal (Coal refers to a combustible black or brownish ...)
Volatile (Volatile is the Italian word for bird or winged, ...)
Bituminous coal (A Bituminous coal is a dense, black, soft coal, ...)
Anthracite (Anthracite is characterized as the highest rank ...)
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