- 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 ...
Heap leaching of cupriferous sulfides after their slow oxidation to sulfates on prolonged atmospheric weathering.
Industry:Mining
Heat evolved or absorbed when a liquid and a solid surface are placed in contact.
Industry:Mining
Heat evolved when unit weight of a salt crystallizes from a large amount of a saturated solution.
Industry:Mining
Heat needed to raise 1 lb (0.45 kg) of water 1 degrees F (5/9 degrees C) (equal to 252 cal or 1,054 J). Symbol, Btu. Compare: heat unit
Industry:Mining
Heating ceramic materials or ware above the temperature required to produce the necessary degree of vitrification. Usually results in bloating, deformation, or blistering of the ware.
Industry:Mining
Heating ferrous iron ore in the presence of air in order to oxidize the iron content, present in whatever form, to the magnetic oxide so that in a subsequent operation it can be separated from the gangue by means of a magnetic separator. Also, roasting a hematitic ore with scrap iron to reduce it to magnetite.
Industry:Mining
Heating hot-rolled ferrous sheet in an open furnace to a temperature within the transformation range, and then cooling it in air in order to soften the metal. The formation of a bluish oxide on the surface is incidental.
Industry:Mining
Heavily timbered passage between levels in a mine for the transfer of unattached mules from one level to the other.
Industry:Mining
Heavy mineral suites increase in complexity with decreasing geologic age.
Industry:Mining
Heavy screen shielding fine screen for separating differently sized particles.
Industry:Mining
