- المجال: 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 ...
Said of a gemstone having a true or natural luster when uncut; e.g., of the natural, unpolished faces of a diamond crystal. Also spelled naife.
Industry:Mining
Adjoining, touching, or connected throughout, as in a group of mining claims.
Industry:Mining
Adjustable annular ring, made of plastic, used to control the aperture area at the apex of a hydrocyclone.
Industry:Mining
Adjusting the troughing idlers, return idlers, or tail or head pulleys forward or back so that conveyor belting will run in the desired position on the conveyor frame to prevent spilling of ore.
Industry:Mining
Aeration of water or ore pulp before treatment, notably by froth flotation where deoxygenated water is used (e.g., from under a frozen lake). Also used to stabilize ore pulp containing unstable sulfides before cyanidation.
Industry:Mining
After a shaft has been sunk to a certain depth, the final or permanent lining is inserted. This may consist of: brick walling; concrete blocks shaped to the curvature of the shaft; concrete lining put in liquid form behind shuttering; brick coffering; and cast-iron tubbing. The permanent lining is generally built up in sections, during which operation the temporary lining (such as skeleton tubbing) is removed. Concrete is now widely used as a permanent shaft support.
Industry:Mining
Agate displaying concentric bands, commonly of various colors, about a dark center suggesting an eye.
Industry:Mining
Agate displaying concentric bands, commonly of various colors, about a dark center suggesting an eye.
Industry:Mining
Agate in colors disposed in parallel or subparallel bands, more or less wavy or sinuous. Most agate in the trade is dyed, and bands are of differing tones due to varying capacity to absorb the dye.
Industry:Mining
