- 行业: Mining
- Number of terms: 33118
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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 ...
One of the imaginary boundary lines running east and west at 6-mile (9.6-km) intervals and marking the relative north and south locations of townships in a U.S. public land survey. Compare: range line
Industry:Mining
One of the imaginary boundary lines running north and south at six-mile intervals and marking the relative east and west locations of townships in the U.S. public-land survey; a meridional township boundary line. Compare: township line
Industry:Mining
One of the internal cracks formed in steel by differential expansion of surface and interior during heating. The tendency for clinks to occur increases with the hardness and mass of the metal, and with the rate of heating.
Industry:Mining
One of the large samples of a few hundredweight or more taken at regular, though widely spaced, intervals. In the case of coal, a car load may be taken at intervals for size analysis and dirt content.
Industry:Mining
One of the machines, such as the Dorr classifier, that are commonly used to classify a ball-mill or rod-mill discharge into finished product and oversize.
Industry:Mining
One of the main parts of a belt conveyor. The belting consists of piles of cotton duck impregnated with rubber, with top and bottom covers of rubber. The carrying capacity of the belt will vary, depending on the running speed and the width of the belt.
Industry:Mining
One of the most abundant of the rare earth metals. Symbol, Ce. The minerals monazite and bastnasite are presently its two most important sources. It is used in the manufacture of pyrophoric alloy. The oxide is a constituent of incandescent gas mantles and is emerging as a catalyst in self-cleaning ovens. The sulfate is used as an oxidizing agent in quantitative analysis. Other cerium compounds are used in the manufacture of glass, as a polishing agent, and in carbon-arc lighting, petroleum refining, and metallurgical and nuclear applications.
Industry:Mining
One of the most famous of ancient statuary marbles; from Mount Pentelicus, Greece.
Industry:Mining
One of the most famous of ancient statuary marbles; from the island of Paros, Greece.
Industry:Mining
One of the nearly contemporaneous subdivisions of a lava flow (usually basaltic) that consists of two or more parts that were poured one over the other during the course of a single eruption.
Industry:Mining
