- 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 ...
The solubility of a precipitate in a solution of an electrolyte that has no ion in common with the precipitate is higher than it is in pure water. This is not the salting-out effect. Compare: salting out
Industry:Mining
The sorting, picking, screening, washing, pneumatic separation, and mixing of coal sizes for the market.
Industry:Mining
The source or ground of the existence of anything, either as cause or as occasion; that from which a thing is derived or by which it is caused; esp., that which initiates or lays the foundation; e.g., the origin of ore deposits.
Industry:Mining
The South African measure of land, equal to 640.25 square rods, 92,196 ft<sub>2</sub>(8,565 m<sub>2</sub>), 1.44 claims, or 2.1165 English acres (0.857 ha). There are 284 morgens to a square mile and 735.5 morgens/km<sub>2</sub>.
Industry:Mining
The space adjacent to a gate end at the face and between the face end of a gate-side pack and the coal face into which packs will be inserted when the gate is ripped or dinted.
Industry:Mining
The space available in the casing of a pneumatic rotary rock or coal drill is necessarily limited and precludes the use of a reciprocating engine. The power unit used instead is similar in design to the vane compressor. The rotor runs at a very high speed, between 3,500 rpm and 4,000 rpm, and this is reduced by gearing to give a drill spindle speed of about 650 rpm.
Industry:Mining
The space between the blocks separating the cap in a heading set from the poling driven. This space provides for driving a second set of poling boards.
Industry:Mining
The space in a foundry in which molds are placed and castings are made. In the Bessemer and open-hearth steelworks, it is the space utilized for casting the molten steel into cast iron ingot molds.
Industry:Mining
The special and characteristic method according to which twin crystals of any mineral are formed.
Industry:Mining
