- 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 ...
A powerful exploder usually operated by a vertical rack, which, on a downward movement, drives an armature. At the end of the stroke of the rack bar an internal shortcircuiting device opens and the current generated by the rapidly revolving armature passes into the shot-firing circuit.
Industry:Mining
A power-operated structure for discharging coal or other material from a railway wagon.
Industry:Mining
A pozzolana from the Greek island of Santorin. A quoted composition is 64% SiO<sub>2</sub>, 13% Al<sub>2</sub>O<sub>3</sub>, 5.5% Fe<sub>2</sub>O<sub>3</sub>, 1% TiO<sub>2</sub>, 3.5% CaO, 2% MgO, 6.5% alkalies, and 4% loss on ignition.
Industry:Mining
A practice in which promoters, through the connivance of brokers who pretend to carry through transactions and thus obtain false quotations, create a fictitious flurry of activity in the stock market.
Industry:Mining
A practice of jetting oxygen into pig iron before it is charged into the steel furnace; this oxidizes and removes most of the silicon.
Industry:Mining
A precious metals leaching technique in which granular activated carbon particles much larger than the ground ore particles are added to the cyanidation pulp after the precious metals have been solubilized. The activated carbon and pulp are agitated together to enable the solubilized precious metals to become adsorbed onto the activated carbon. The loaded activated carbon is mechanically screened to separate it from the barren ore pulp and processed to remove the precious metals and prepare it for reuse.
Industry:Mining
A precipice; as used in some parts of Spanish America, a ravine or small canyon. Also spelled barranco.
Industry:Mining
A precipitated black magnetic iron oxide. Used mainly in plate printing inks and in paints, but has small abrasive applications.
Industry:Mining
