- 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 ...
Process in which earth is pushed over the edge of a deep fill and allowed to roll down the slope.
Industry:Mining
Process in which purified titanium tetrachloride is reduced to the metallic state with magnesium in an inert atmosphere of helium or argon.
Industry:Mining
Process involving the reaction of impure titanium metal with iodine to form the volatile tetraiodide, which is then decomposed on a hot wire at temperatures between 2,000 degrees F and 2,730 degrees F (1,093 degrees C and 1,500 degrees C) to form highpurity titanium and iodine.
Industry:Mining
Process of formation of a peat bog. This requires a steady growth of new peat-forming plants in phase with a steady general sinking of the depression in which this occurs.
Industry:Mining
Process that can recover the energy of coal seams without the extensive use of traditional mining operations. The primary product brought from underground is hot fully combusted flue gas, 1,100 to 1,800 degrees F (approx. 600 to 1,000 degrees C), whose sensible heat contains most of the heating value of the coal, 5,000 to 13,000 Btu/lb (11.6 to 30.2 MJ/kg). Particularly applicable to coal deposits that are not economically or technically feasible to mine by conventional methods because of seam quality or quantity, depth, dip, strata integrity, overburden thickness, etc.
Industry:Mining
Processes that separate particles of different sizes or composition on the basis of specific gravity. When ore or coal particles are introduced into a liquid (or into a medium: a solid suspension), those having a specific gravity higher than that of the liquid will sink, while those that are lighter than the liquid will float.
Industry:Mining
Produced by explosive or aerial ejection of ash, fragments, and glassy material from a volcanic vent. Applied to the rocks and rock layers as well as to the textures so formed.
Industry:Mining
Produced by radioactive transformation. Thus, uranium minerals contain radiogenic lead and radiogenic helium. The heat produced within the earth by the disintegration of radioactive nuclides is radiogenic heat.
Industry:Mining
