- 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 ...
Those characteristic and distinctive aspects of a sedimentary rock that are visible and identifiable only under the microscope (low-power magnification).
Industry:Mining
Those in commercial production are pyrolusite, psilomelane, braunite, and manganite. Manganese is used chiefly in steel manufacture.
Industry:Mining
Those most exploited for industrial use are patronite (MoS<sub>2</sub>with vandium sulfide) , roscoelite (vanadium mica), vanadinite, carnotite, and chlorovanadinite. Metal is silvery and whitish; melting point is 1,720 degrees C; used in high-speed steels and shockresistant alloys, chemicals, ceramics, and textiles.
Industry:Mining
Those properties of the ocean, such as salinity, the concentrations of which are not affected by the presence or activity of living organisms, but which are affected only by diffusion and advection.
Industry:Mining
Those rolls in an anthracite breaker that are set farthest apart to break the coal into steamboat coal.
Industry:Mining
Those substances added to the pulp to selectively treat coal or waste surfaces prior to flotation.
Industry:Mining
Those which can be rammed to form a monolithic furnace lining or special shapes.
Industry:Mining
Threadlike crystals of one mineral embedded in another mineral; e.g., rutilated quartz.
Industry:Mining
