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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources. Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
Any frequency corresponding to a normal audible sound wave (ranges roughly from 15,000 to 20,000 Hz).
Industry:Mining
Any fuel that is a solid; such as wood, peat, lignite, bituminous, and anthracite coals of the natural variety and the prepared varieties such as, pulverized coal, briquettes, charcoal, and coke. Divided into two broad classes: naturally occurring and manufactured.
Industry:Mining
Any gemstone that, when cut en cabochon in the correct crystallographic direction, displays a rayed figure (a star) by either reflected or transmitted light; e.g., star sapphire.
Industry:Mining
Any gemstone that, when cut en cabochon in the correct crystallographic direction, displays a rayed figure (a star) by either reflected or transmitted light; e.g., star sapphire.
Industry:Mining
Any hammer wielded by hand. A blacksmith's (or miner's) hammer used with one hand as distinguished from a heavier hammer or sledge.
Industry:Mining
Any hard fine grained rock, commonly siliceous, that is suitable for sharpening implements such as razors, knives, and other blades; e.g., novaculite.
Industry:Mining
Any hard, siliceous rock suitable for use as a material for millstones; specif. the Millstone Grit of the British Carboniferous, a coarse conglomeratic sandstone.
Industry:Mining
Any horizontally mounted cylindrical mill in which contents are tumbled when rotating. Name often used in connection with cleaning of objects.
Industry:Mining
Any hydrometallurgical process, such as the cyanide process, flotation process, etc.
Industry:Mining
Any igneous intrusion that is composed of two or more injections of different chemical and mineralogical composition. Compare: multiple intrusion
Industry:Mining
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