- المجال: 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 ...
A misnomer for lapis lazuli containing flecks of pyrite. Not to be confused with golden sapphire.
Industry:Mining
A misnomer; the mineral bearing this name is limonite, a hydrous mixture of minerals, whereas true hematite is an anhydrous oxide mineral.
Industry:Mining
A misnomer; the mineral bearing this name is limonite, a hydrous mixture of minerals, whereas true hematite is an anhydrous oxide mineral.
Industry:Mining
A misnomer; the mineral bearing this name is limonite, a hydrous mixture of minerals, whereas true hematite is an anhydrous oxide mineral.
Industry:Mining
A mixed method of chemical reaction plus flotation developed for such copper ores as chrysocolla and the oxidized minerals. The value is dissolved by leaching with acid, and the copper is reprecipitated on finely divided particles of iron, which are then recovered by flotation, yielding an impure concentrate in which metallic copper predominates. Abbrev., L.P.F.
Industry:Mining
A mixture consisting of 85% to 95% tungsten carbide and 5% to 15% cobalt; sp gr, 12 to 16; Mohs hardness, about 9.0; it is not affected by severe high industrial temperatures. Used for machine tools and for abrasives for machining and grinding metals, rocks, molded products, porcelain, and glass.
Industry:Mining
A mixture of 2 parts potassium chlorate, 1 part potassium ferrocyanide, and 1 part sugar.
Industry:Mining
A mixture of a disordered clinochrysotile or lizardite with a talclike mineral.
Industry:Mining
