- Sektör: Mining
- Number of terms: 33118
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- 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 ...
A green, hydrous phosphate mineral, chiefly of manganese, iron, and sodium.
Industry:Mining
A greenish-black muscovite found in a schist at Derby, VT; has been called margarodite.
Industry:Mining
A grindability method based on the principle that all coals are ground to the same fineness, about that required for pulverized fuels, and then using the relative amounts of energy required for this reduction in size as a measure of grindability.
Industry:Mining
A grinding mill in which a vertically suspended rolling disk rotates, and under the influence of centrifugal force bears on ore passing between it and a stationary bowl, crushing the passing ore on its way to a peripheral discharge.
Industry:Mining
A grinding mill with two horizontal circular stones, one revolving upon the other, such as in an old-fashioned grain mill.
Industry:Mining
A grinding mill, usually cylindrical, into which a charge of ore and water is placed and is ground to completion of the required comminution.
Industry:Mining
