- Bone coal
- Coal with a high ash content; it is dull in appearance, hard, and compact.
Energy terms . 2014.
Bone coal
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bone coal — n impure coal that contains much clay or other fine grained detrital mineral matter … Coke&Coal Terminology
bone coal — noun : bone I 8b … Useful english dictionary
coal — n a brown to black combustible sedimentary rock (in the geological sense) composed principally of consolidated and chemically altered plant remains. DISCUSSION Conditions required for formation of coal are believed to include accumulation of… … Coke&Coal Terminology
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Coal breaker — A coal breaking plant, depicted on a postcard in 1907. A coal breaker was a coal processing plant which broke coal into various useful sizes. Coal breakers also removed impurities from the coal (typically slate) and deposited them into a culm… … Wikipedia
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Bone ash — Ash Ash, n., sing. of {Ashes}. [1913 Webster] Note: Ash is rarely used in the singular except in connection with chemical or geological products; as, soda ash, coal which yields a red ash, etc., or as a qualifying or combining word; as, ash bin,… … The Collaborative International Dictionary of English
impure coal — n coal having 25 weight % or more, but less than 50 weight %, of ash on the dry basis. DISCUSSION Bone coal with more than 50 weight % ash is properly called coaly or carbonaceous shale or siltstone. Types of impure coal other than bone coal and… … Coke&Coal Terminology
nonbanded coal — n consistently fine granular coal essentially devoid of megascopic layers. DISCUSSION Nonbanded coal may be interbedded with common banded coal, or form a discrete layer at the top or at the bottom of the seam, or may compose the entire seam. It… … Coke&Coal Terminology
canal-bone — canal bone, coal var. cannel bone, coal … Useful english dictionary
