- 行业: 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 ...
The temperature at which a change in phase occurs. The term is sometimes used to denote the limiting temperature of a transformation range.
Industry:Mining
The temperature at which a gas would show no pressure if the general law for gases would hold for all temperatures. It is equal to -273.16 degrees C or -459 degrees F. Compare: temperature.
Industry:Mining
The temperature at which a special test cone made from particles of ash obtained from the coal will (1) begin to deform, i.e., soften, or (2) completely deform or fuse into a blob.
Industry:Mining
The temperature at which melting takes place. Most refractory materials have no definite melting points, but soften gradually over a range of temperatures.
Industry:Mining
The temperature at which there is a transition in a substance from one phase to another of markedly different magnetic properties. Specif., the temperature at which there is a transition between the ferromagnetic and paramagnetic phases.
Industry:Mining
The temperature of magnetic transformation below which a metal or alloy is magnetic and above which it is paramagnetic.
Industry:Mining
The temperature of the fluid at or near the bottom of a borehole; significantly lower than the temperature of the formation if borehole fluids have been circulated recently or are being produced with expansion into the well bore.
Industry:Mining
The temperature that would be attained if no heat were gained from or lost to the surroundings.
Industry:Mining
The tendency for hardened steel to decrease in hardness from the surface to the center, as a result of the variation in the rate of cooling throughout the section. Becomes less marked as the rate of cooling required for hardening decreases; i.e., as the content of alloying elements increases.
Industry:Mining
