- 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 ...
A separator consisting of two concentric right-vertical tubes, a conventional cyclone header at the top, and a froth pedestal at the bottom. The inner tube is a porous-wall tube. The slurry is fed tangentially through the cyclone header to develop a radial swirl flow. Air is sparged through the jacketed, inner porous tube wall and is sheared into small bubbles by the swirl flow. Hydrophobic coal particles in the slurry attach to the air bubbles and report as overflow product. The hydrophilic refuse particles remain wetted and report as underflow product.
Industry:Mining
A separator; a tub, pan, vat, or tank in which a separation can be effected by settling. A tub or vat in which pulp from the amalgamating pan or battery pulp is allowed to settle; the pulp is stirred in water to remove the lighter portions.
Industry:Mining
A separator; a tub, pan, vat, or tank in which a separation can be effected by settling. A tub or vat in which pulp from the amalgamating pan or battery pulp is allowed to settle; the pulp is stirred in water to remove the lighter portions.
Industry:Mining
A sequence control system that is suitable for a group of conveyors in tandem. The trunk conveyor contactor is first closed; after a delay of from 3 to 15 s, sufficient for its motor to come up to speed, power is switched on to the contactor of the second conveyor; finally, after a similar delay, power is switched on to the third conveyor or conveyors. All power comes through the number 1 conveyor contactor so that, if this conveyor is stopped, all other conveyors in tandem stop as well.
Industry:Mining
A sequence of events involving the formation, alteration, destruction, and reformation of rocks as a result of such processes as magmatism, erosion, transportation, deposition, lithification, and metamorphism. A possible sequence involves the crystallization of magma to form igneous rocks that are then broken down to sediment as a result of weathering, the sediments later being lithified to form sedimentary rocks, which in turn are altered to metamorphic rocks.
Industry:Mining
A sequestering agent forms soluble complex ions with a simple ion, thereby inhibiting the activity of that ion.
Industry:Mining
A series comprising rocks of different chemical composition that were metamorphosed under identical physical conditions.
Industry:Mining
A series method of electrolytic refining. Unrefined copper anodes are suspended in an acid electrolyte; one side of each then acts as an anode and the other as a cathode.
Industry:Mining
A series of anticlines and synclines, so grouped that taken together they have the general outline of an arch; opposite of synclinorium.
Industry:Mining
A series of beds deposited during a single sedimentary cycle of the type that prevailed during the Pennsylvanian period. The cyclothem, which ideally consists of 10 members (in western Illinois, the fifth member is a coal layer), indicates an unstable coastal environment in which marine submergence and emergence occurred. A cyclothem ranks as a formation in the scale of stratigraphic nomenclature.
Industry:Mining
