- 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 ...
Measures the intensity of the light scattered at an angle from the incident beam by a dust cloud, and correlates well with the concentration determined by the thermal precipitator or the surface area calculated from such a count. However, it needs to be calibrated for each type of dust cloud, owing to difference in mineralogical content, against the thermal precipitator.
Industry:Mining
Measuring by weight or by volume the constituents, before mixing of concrete, mortar, or plaster.
Industry:Mining
Mechanical resistance to the relative motion of contiguous bodies or of a body and a medium.
Industry:Mining
Mechanical sampling systematically removes a portion of the stream of material for a sample. Mechanical sampling is widely used in cone preparation plants and concentrators where large quantities of materials are to be sampled, while hand sampling is used for smaller amounts. Compare: hand sampling
Industry:Mining
Mechanical shovels or other machines singly or in combination used to load excavated or stockpiled materials into trucks, mine cars, conveyors, or other transportation or haulage units.
Industry:Mining
Mechanism for control of rate of feed of coarse ore in the primary and secondary crushing system. Several heavy loops of chain lie above and bear on ore that rests in the delivery chute at just above its natural angle of repose. When the shaft from which the loops are suspended is rotated by its small motor, ore slides under control.
Industry:Mining
Mechanism for forcing a hole through an embankment for the insertion of pipes or cables.
Industry:Mining
Mechanized devices on which a nest of laboratory sieves can be shaken or electrically vibrated during the size analysis of sands.
Industry:Mining
Mechanized drying floor used for ores or concentrates. Reciprocating rakes move the material gently over steel plates heated from below.
Industry:Mining
Mechanized pit digger used in checking of alluvial boring. Five-foot-long (1.52-m-long) sections of tubing 24 in (61 cm) in internal diameter are worked into the ground from their mounting on a tractor, the spoil being at the same time removed by means of a bucket or grab. In suitable ground 50 ft (15.2 m) or more depth has been reached.
Industry:Mining
