- 行业: Mining
- Number of terms: 33118
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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 ...
Vibrator of shaking table that imparts reciprocating motion to the deck.
Industry:Mining
Virtually all the industrial supply of tin comes from cassiterite, SnO<sub>2</sub>, though a little has been won from the sulfides stannite, cylindrite, and franckeite. Bulk of cassiterite comes from alluvial workings. Main market is in tin plating, tin foil, solders, bearing metals, bronze and other alloys, and such salts as opacifiers and dye mordants.
Industry:Mining
Viscous damping is the dissipation of energy that occurs when a particle in a vibrating system is resisted by a force the magnitude of which is a constant, independent of displacement and velocity, and the direction of which is opposite to the direction of the velocity of the particle.
Industry:Mining
Viscous resistance offered by a slurry, sludge, mud, or suspension of minerals in water as a pulp, due to the specific surface involved, with possibly an element of thixotropy under stated conditions of pH value, agitation, flow, temperature, and solid-to-liquid ratio. The pseudoviscous effect is distinct from viscosity due to molecular shear.
Industry:Mining
Visual-type portable photometer operated by visual comparison of brightness. So named because it can be calibrated to indicate the photometric brightness of the object viewed in the sighting telescope.
Industry:Mining
Vitrain in which the plant remains are discernible under a microscope.
Industry:Mining
