- المجال: 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 series of patented processes originally developed for the concentration of ore, but finding increased usage in coal cleaning. Suspension of magnetite (sp gr, 5.0) and ferrosilicon (sp gr, 6.7) are usually used for ore concentration; suspensions of magnetite for coal. The basic features of these processes as applied to coal are in the methods used for handling the magnetic medium. Specifications for magnetite should be somewhat as follows: l00% -100 mesh, 65% to 75% -325 mesh, 85% magnetics, and wet-ground in a ball or rod mill.
Industry:Mining
A series of plans of a proposed new mine or reconstruction, which are drawn up for the purpose of obtaining approval of a project.
Industry:Mining
A series of plutonic rocks containing nepheline and 30% to 60% mafic minerals, generally clinopyroxene, and including sphene, apatite, and melanite; also, any rock of that series. Melteigite and jacupirangite are more mafic members of the series; urtite is a type rich in nepheline. Named by Ramsay in 1891 for Ijola (Iivaara), Finland.
Industry:Mining
A series of pockets through which successively weaker streams of water are directed upward. The material that can settle does so, and is drawn off through spigots.
Industry:Mining
A series of pots for separating silver and lead by making use of the fact that the melting point of their alloys rises as the percentage of silver increases.
Industry:Mining
A series of pumps or sets of pumps by which water is lifted from the mine in successive stages. See: lift
Industry:Mining
A series of repetitive batch tests in which the middling products generated in one test are added to the subsequent test to simulate the operations of a continuous process in which intermediate-grade materials are recycled. Each test is referred to as a "cycle." When equilibrium is reached in two or more cycles, depending on the sensitivity of the separation, the test is said to be "locked" or "balanced."
Industry:Mining
A series of rocks generally with complex structure beneath the dominantly sedimentary rocks. In many places, these are igneous and metamorphic rocks of either Early or Late Precambrian, but in some places these may be much younger, as Paleozoic, Mesozoic, or even Cenozoic.
Industry:Mining
A series of rocks generally with complex structure beneath the dominantly sedimentary rocks. In many places, these are igneous and metamorphic rocks of either Early or Late Precambrian, but in some places these may be much younger, as Paleozoic, Mesozoic, or even Cenozoic.
Industry:Mining
A series of rolls supported in a frame over which objects are advanced manually, by gravity or by power.
Industry:Mining
