- 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 ...
In practice, complete combustion cannot be obtained without slightly more air than is theoretically necessary. The amount of this excess air varies with the design and mechanical condition of the appliance, but ranges from 15% upward.
Industry:Mining
In process control, the element that directly changes the value of the manipulated variable.
Industry:Mining
In prospecting, use of a portable ultraviolet lamp to reveal fluorescent minerals.
Industry:Mining
In pump nomenclature, it exists when the liquid level is below the pump centerline and/or when a gage on the suction would show a vacuum.
Industry:Mining
In pumping or in ventilation, the use of a propeller or impeller to accelerate the load along the axis of the impeller.
Industry:Mining
In pyrometallurgy, reduction of air supply to a furnace, to lower temperature or reduce working rate.
Industry:Mining
In quarry industry, one who roughs stone slabs in blocks with a scabbling pick to produce a uniform rectangular shape and to reduce shipping weight.
Industry:Mining
In quarrying, a bed consisting of a circular disk of cast iron of varying diameters, rotating on a vertical axis. Marble slabs or blocks held on the surface of this rotating disk, to which sand and water are applied, are worn down to desired dimensions and smoothness.
Industry:Mining
In quarrying, a block of stone bounded by three pairs of parallel faces, all adjacent faces meeting at right angles.
Industry:Mining
In quarrying, a process that gives a smoother surface than rubbing. It is accomplished with silicon carbide or aluminum oxide abrasive bricks attached to revolving buffer heads.
Industry:Mining
