- 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 ...
The bulk of the contraction that accompanies the solidification of metals is concentrated in the feeder heads and risers, from which molten metal flows to compensate for contraction in the casting of ingot proper.
Industry:Mining
The burning of gas and/or dust with evidence of violence from rapid expansion of gases.
Industry:Mining
The burning of gas and/or dust without evidence of violence from expansion of gases.
Industry:Mining
The calcium phosphate of bones and of phosphatic rocks, such as found in North Carolina; so called in commerce.
Industry:Mining
The calculation of reduced levels from the staff readings recorded in a field book.
Industry:Mining
The calibration of alternating current instruments is based upon what is called the virtual value, and this corresponds to the direct-current value, which would produce the same heating effect in a given resistance. The peak value of alternating voltage or current is 1.4 times greater than the virtual value.
Industry:Mining
The calorific value obtained when coal is burned under a boiler.
Industry:Mining
The calorific value of volatile matter in therms per ton of dry coke, of the gas given off when dry coke, ground to pass a 36-mesh B.S. test sieve, is heated under standard conditions.
Industry:Mining
