- Industria: 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 pumpable thin slurry consisting primarily of a mixture of cement, sand, and water; injected into rock formations through boreholes as a sealant.
Industry:Mining
A punch used for pressing of the sintered compact during the sizing operation.
Industry:Mining
A pure, dense, homogeneous, dove-colored, fine-textured limestone that breaks with a smooth and more or less pronounced conchoidal fracture that contains relatively few fossils, and that typically has a white, chalky appearance on weathered surfaces. Named after T. Wayland Vaughan (1870-1952), U.S. paleontologist.
Industry:Mining
A purification technique in which a molten or high-temperature zone is moved along a length of material to be purified to bring about impurity segregation; the impurities become concentrated in the slowly moving hot zone, leaving behind the cooler solidified material that has a higher purity than the original material. The technique depends on differences in composition of liquids and solids in equilibrium and may be repeated to attain high degrees of purity. It usually is applied to crystalline materials, such as germanium or silicon.
Industry:Mining
A push-button mining machine with a potential range of 1,000 ft (304.8 m) into a seam from the highwall, a maximum production of some 600 st (544 t) per shift, and a recovery of 65% to 75% of the coal within the reach of the machine. This unit is a continuous miner working controlled from outside the seam of coal. The operator can control both the vertical and horizontal direction of the cutting heads as shown on an oscilloscope screen. As the cutting head advances into the coal seam, it drags a series of conveyor sections behind it, which in turn deposit the coal into a truck.
Industry:Mining
A pusher chain conveyor used for moving small cars, such as mine cars, along a track. A form of tow conveyor.
Industry:Mining
A pyroclastic rock consisting of more or less equal amounts of ash, lapilli, and larger fragments.
Industry:Mining
A pyrometallurgical process that produces an impure liquid metal and a liquid slag by heating a mixture of ore, flux, and reducing agent (usually coke).
Industry:Mining
