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Low-grade coal
Answer for the clue "Low-grade coal ", 7 letters:
lignite
Alternative clues for the word lignite
Word definitions for lignite in dictionaries
Wikipedia
Word definitions in Wikipedia
Lignite , often referred to as brown coal , is a soft brown combustible sedimentary rock formed from naturally compressed peat . It is considered the lowest rank of coal due to its relatively low heat content. It has a carbon content around 60–70 percent. ...
WordNet
Word definitions in WordNet
n. intermediate between peat and bituminous coal [syn: brown coal , wood coal ]
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Lignite \Lig"nite\ (l[i^]g"n[imac]t), n. [L. lignum wood: cf. F. lignite.] (Min.) Mineral coal retaining the texture of the wood from which it was formed, and burning with an empyreumatic odor. It is of more recent origin than the anthracite and bituminous ...
Wiktionary
Word definitions in Wiktionary
n. A low-grade, brownish-black coal
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
"imperfectly formed coal," 1808, from French, from Latin lignum "wood" (see ligni- ). Brown coal that still shows traces of the wood it once was. Probably directly from Lithanthrax Lignius , name given to woody coal by Swedish chemist Johan Gottschalk Wallerius ...
Usage examples of lignite.
Sophia has toyed with lignite mines in Albania and decided to look into oil.
The scope of the fuel investigations has been planned to conform to the provisions of the Act of Congress which provides for analyzing and testing coals, lignites, and other mineral fuel substances belonging to the United States, or for the use of the United States Government, and examinations for the purpose of increasing the general efficiency or available supply of the fuel resources in the United States.
These investigations have already progressed far enough to admit of the identification of some of the botanical constituents of the older peats and the younger lignites, and it is believed that the origin of the older lignites, and even of some of the more recent bituminous coals, may be developed through this examination.
And as the lignite mist crept through the web of tram lines and the branches of poplar, black locust, and pollarded horse chestnut trees, along yellow cobblestone streets of such oppressive silence that even the voices of schoolchildren seemed muffled in whispers, it evoked my earliest memories, of visiting my grandparents on Eastern Parkway in Brooklyn in the mid-1950s, a world of doilies and florid upholstery and jam and pickle jars.
In order of increasing energy content, they are lignite ('brown coal,' 9-17,000,000 BTU/ton), bituminous coal ('soft coal,' 21-30,000,000 BTU/ton), and anthracite ('hard coal,' 22-28,000,000 BTU/ton)([i]Wikipedia[/i], 'Coal').
The rhythm of the furnaces, the stench of local brown lignite, the rumbling of the metal rollers .
The rhythm of the furnaces, the stench of local brown lignite, the rumbling of the metal rollers.
In the higher beds are found, on the contrary, lignite and fossil wood, substances in which the quantity of carbon is infinitely less.
The main reason are the valuable resources of Halite (NaCl), Sylvin (KCl), Gypsum (CaSO4), Bitter Salt (MgSO4), Glaubersalt (Na2SO4) and lignite only two miles away.