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Culm (other)
Culm or The Culm may refer to: * Culm (anthracite), meaning of "culm" in British English, a kind of coal found in the Culm Measures, and a term used for fine-grained waste from anthracite coal **Culm bomb or culm ball * Culm (botany), the stem of a grass or sedge * Culm (waste coal), meaning of "culm" in American English * Culm Measures, a geological formation of England ** Culm National Character Area, an area defined by Natural England * River Culm, in Mid-Devon, England * Culm bank, a coalmine waste or spoil heap, a pitheap or as misnamed 'a slagheap' * Culm grassland, semi-natural grassland containing abundant purple moor grass * Culm, the German name of Chełmno, Poland, also spelled Kulm See also * Kulm (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culm (anthracite)
Anthracite, also known as hard coal, and black coal, is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals. Anthracite is the most metamorphosed type of coal (but still represents low-grade metamorphism), in which the carbon content is between 86% and 97%. The term is applied to those varieties of coal which do not give off tarry or other hydrocarbon vapours when heated below their point of ignition. Anthracite ignites with difficulty and burns with a short, blue, and smokeless flame. Anthracite is categorized into standard grade, which is used mainly in power generation, high grade (HG) and ultra high grade (UHG), the principal uses of which are in the metallurgy sector. Anthracite accounts for about 1% of global coal reserves, and is mined in only a few countries around the world. The Coal Region of northeastern Penn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
