- 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 ...
A small, cylindrical batching mill used to grind auriferous concentrates gently with mercury.
Industry:Mining
A small, fairly light boring machine for shallow exploratory borings underground. It drills in any direction (downwards, upwards, horizontally, or obliquely) to depths of from 200 to 1,000 m, but usually only 50 m. It uses coring or solid bits, with or without flushing and can be driven either by hand, any oil engine, compressed air, or electricity.
Industry:Mining
A small, loosely aggregated mass of material suspended in or precipitated from a liquid. One of the flakes of a flocculent precipitate.
Industry:Mining
A small, loosely aggregated mass of material suspended in or precipitated from a liquid. One of the flakes of a flocculent precipitate.
Industry:Mining
A small, low fireplace surrounded by three walls, with a tuyere at the back. Three important types are called: ore hearth, waterback ore hearth, and Moffet ore hearth; used in smelting.
Industry:Mining
A small, narrow, deep depression, smaller than a gorge or a canyon but larger than a gully, usually carved by running water; esp. the narrow excavated channel of a mountain stream. Etymol: French, mountain torrent.
Industry:Mining
A small, open-hearth furnace utilizing an air blast with coal or coke for fuel. It is commonly used for heating small metal parts previous to manual, hot-working operations.
Industry:Mining
A small, portable hand drill customarily used by handsetters to drill the holes in bit blanks in which diamonds are to be set. The upper end of the drill is provided with a plate against which the breast of the operator is pressed to force the bit into the work. Compare: brace
Industry:Mining
A small, right-angled prism placed in a front of a portion of the slit of a spectroscope or a spectrograph for the purpose of reflecting light from a second source of light into the collimator, so that two spectra may be viewed simultaneously.
Industry:Mining
