- 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 ...
A multicylinder reciprocating engine, generally of radial type, driven by water under pressure.
Industry:Mining
A multihearthed circular furnace, through which horizontal rabbles revolve and move the feed across each hearth, so that it falls peripherally to the one below and then works inward to central discharge for next hearth below. Rising heat and air provide the roasting conditions.
Industry:Mining
A multiple twin consisting of eight individuals. Compare: cyclic twin; trilling; fourling; fiveling.
Industry:Mining
A multiple-deck roasting furnace for sulfide ore. It is a modification of the Spence furnace.
Industry:Mining
A multiple-deck roasting furnace of the annular type; used in Germany.
Industry:Mining
A multiple-deck, horizontal furnace for calcining sulfide ores. It resembles the Keller furnace.
Industry:Mining
A multiple-shot permissible blasting unit introduced in 1948, known as Capacitor Type Permissible Shot Firer. Weighing approx. 1 lb (0.454 kg) and about the size of an ordinary flashlight, the nonmetallic unit is equipped with a belt hook which permits its being carried under supervision of the shot firer. If desired, shots can be fired without removing the unit from the belt. It is capacitor operated, eliminating dependence on speed of operation for energy output. Capacitors supply high voltage, for a few milliseconds, more than ample to fire from 1 to 10 electric blasting caps.
Industry:Mining
