- 行业: 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 portion of the surface of an ingot or casting showing premature solidification caused by a splash of metal during pouring.
Industry:Mining
A portion of the wall of a lode that is fissured and filled with ore.
Industry:Mining
A portmanteau word from quartz, feldspar, and feldspathoids. Compare: feloids
Industry:Mining
A position in the ventilation circuit of a mine specially chosen for the regular and accurate estimation of the total quantity of air circulating.
Industry:Mining
A positive displacement pump in which compressed air is forced down an input column to squeeze a water-filled bladder, thereby forcing water up a discharge column to the ground surface. The bladder refills by gravity flow at the end of each lifting cycle, because the bladder unit is below the static water lever. See: positive displacement pump.
Industry:Mining
A positive displacement pump used for lifting small quantities of water and discharging them under low heads. It has a plunger arm operating either on an eccentric shaft or a rocker arm thrusting on a rubber diaphragm stretched over a cylinder. As the diaphragm is depressed, the water and air in the cylinder are forced out through the discharge side of the pump. As the diaphragm is lifted, a vacuum is created in the cylinder, and water is forced in.
Industry:Mining
A positive displacement pump with two water or liquid cylinders side by side and geared so that the piston strokes in the cylinders alternate. Such a pump may be either single or double action, depending on the number and placement of intake and discharge valves on the cylinder and may be designed so as to deliver a low volume of liquid at high pressures. Compare: centrifugal pump; triplex pump.
Industry:Mining
A positive-displacement piston pump having three water cylinders mounted side by side. It may be either a single- or double-action type. Compare: duplex pump
Industry:Mining
A positive-displacement pump in which the liquid-propelling parts are cams, gears, impeller wheels, etc., rotating within a case, as distinguished from those pumps that move liquids by means of the to-and-fro motion of a piston within a cylinder. Compare: centrifugal pump
Industry:Mining
