- Industry: 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 ...
Extraction (leaching) of solids by liquid that cycles continuously countercurrent to the material it is depleting of the sought value (e.g., gold in cyanide process), the pregnant liquid at a certain stage being stripped of value and returned as barren solution.
Industry:Mining
Extraction of heat from a compressed gas between two stages of compression in order to improve the efficiency of compression.
Industry:Mining
Extraction of metals by electrolytic decomposition of their fused salts; extraction of metals from electrolytically decomposable compounds dissolved in substances inert under the conditions of electrolysis.
Industry:Mining
Extralateral rights are allowed on a claim whose endlines converge, but they are not allowed in case the endlines diverge. Converging endlines on a claim would have the disadvantage of giving the owner of such a claim a continually diminishing length of vein on working down the dip.
Industry:Mining
Extremely fine layers of gold formed by beating or rolling between layers of goldbeaters' skin; used for gilding works of art, fabrics, and books.
Industry:Mining
Extremely fine-grained material, such as finely pulverized tailings discharged from hydraulic mines or a thin layer of extremely fine silt deposited by a stream during a flood.
Industry:Mining
Extremely fine-grained perthite with submicroscopic lamellae (1 to 5 mu m) detectable only by X-ray diffraction or electron microscopy. The K-rich host may be sanidine, orthoclase, or microcline; the Na-rich phase may be albite or analbite. Compare: perthite; microperthite.
Industry:Mining
Face equipment is mobile or portable mining machinery having electric motors or accessory equipment normally installed or operated inby the last open crosscut in an entry or room.
Industry:Mining
