- 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 ...
The part of the total metal recovered multiplied by the price. The proportion recovered varies with the ore and the method used.
Industry:Mining
The part to be examined is magnetized either by passing a heavy current through it or by making it the core of a coil through which a heavy current is passed. Small cracks, or nonmagnetic phases such as inclusions, cause the magnetic flux to break the surface, thus forming small magnets. When the part is sprayed with a suspension of iron oxide particles in paraffin, the particles cling to the small magnets and thereby reveal defects.
Industry:Mining
The particle size at which it is desired to separate a feed by a sizing operation.
Industry:Mining
The particle size at which substantially all of the valuable minerals are detached from the gangue minerals.
Industry:Mining
The particulate matter not emitted from a duct or stack that becomes airborne due to the forces of wind or surface coal mining and reclamation operations or both. During surface coal mining and reclamation operations it may include emissions from haul roads; wind erosion of exposed surfaces, storage piles, and spoil piles; reclamation operations; and other activities in which material is either removed, stored, transported, or redistributed.
Industry:Mining
The parting or separation of a thick seam into more than two layers of coal.
Industry:Mining
The passage by which the ventilating current is taken out of the mine; the upcast. The return air course. An outlet.
Industry:Mining
The passage of a solvent through a membrane from a dilute solution into a more concentrated one, the membrane being permeable to molecules of solvent but not to molecules of solute.
Industry:Mining
The passing of hot steel bars through pairs of steel rolls to form rolled-steel sections. The final dimension of the product is approached in stages by adjusting the height of the rolls.
Industry:Mining
