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Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Especialidad: Energía
Agregar un término nuevoContribuidores con Carbón
Coal
analisis proximada
Minería; Carbón
Un estimo fiable del valor comercial del carbono testando la umedad, material volatil. ceniza y carbono fijado.
apoyo de techo
Minería; Carbón
Postes, jacks y otro material utilizado en una mina de carbono para apoyar el techo.
Glosarios destacados
HOSEOKNAM
0
Términos
42
Blosarios
11
Seguidores
Wind energy company of China
dnatalia
0
Términos
60
Blosarios
2
Seguidores