- 行业: Mining
- Number of terms: 33118
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- 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 ...
Luminous intensity per unit of apparent area; i.e., the area as projected on a plane normal to the direction of viewing. It is determined by the incident light flux falling upon the surface, the reflection factor of the surface, and the angle that the surface makes with the direction in which it is viewed. It is independent of distance; i.e., a surface appears equally bright no matter what the distance from which it is seen.
Industry:Mining
Lump lime after forking or screening to remove the finer portion. The portion removed is usually that which will pass a 1/2-in sieve.
Industry:Mining
Lump lime which, when flaked, has a characteristic shell-like appearance. It is used mainly in Scotland.
Industry:Mining
Lump or pebble quicklime used for fluxing in steel manufacture. The term may be applied more broadly to include fluxing of nonferrous metals and glass. It is a type of chemical lime.
Industry:Mining
Lumps of copper too large to pass the screen, which accumulate in the bottom of the mortar of the stamp.
Industry:Mining
Lumps of mica in which laminae have not been separated into thin sheets.
Industry:Mining
Lustrous hematite, Fe<sub>2</sub>O<sub>3</sub>. Specular iron ore; iron glance. Mohs hardness, 6; sp gr, 5.2.
Industry:Mining
Lying or arranged as a plane or in planes, usually implying more or less parallelism, as in bedding or cleavage. It is a two-dimensional arrangement, in contrast to the onedimensional linear arrangement.
Industry:Mining
