- 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 ...
A semimetallized pellet developed by the U.S. Bureau of Mines from taconite concentrates. The process involves rolling the concentrates into pellets, then drying, calcining, and roasting the pellets in a reducing (oxygen-deficient) atmosphere. During the heat-hardening stage, the pellets are partly converted to metal. Use of these pellets causes a considerable increase in pig-iron production.
Industry:Mining
A semiopaque to semitransparent asteriated variety of ruby normally having six chatoyant rays. Compare: corundum cat's eye
Industry:Mining
A semiopaque to semitransparent asteriated variety of sapphire normally with six rays resulting from the presence of microscopic crystals (e.g., rutile needles) in various orientations with the gemstone.
Industry:Mining
A sensation of annoyance, or in extreme cases pain, caused by high or nonuniform distribution of brightness in the field of view. Discomfort glare is a measure of discomfort or annoyance only. Compare: disability glare
Industry:Mining
A sensitive detector of light in which the initial electron current, derived from photoelectric emission, is amplified by successive stages of secondary electron emission.
Industry:Mining
A sensitive form of water gage, giving readings of greater accuracy. It is used mainly for ventilation surveys.
Industry:Mining
A sensitive instrument used in water transparency and light absorption measurements at sea. The instrument, which contains its own light source, can measure fine graduations of transparency of an individual water mass.
Industry:Mining
A sensitive torsion balance for measuring variations in the density of the underlying rocks; it records the horizontal gradient of gravity.
Industry:Mining
A sensor installed on a conveyor drive pulley snub roller, on a return roller, on a bend roller, or on a head pulley that will detect a slowing of the conveyor, resulting in conveyor shut-down to avoid conveyor belt fires or overloading of the conveyor because of the slipping.
Industry:Mining
A separate and self-contained electronic unit or element of an electronic device which can be treated as a single package.
Industry:Mining
