- 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 ...
An alternate name for serpentine minerals reflecting their 7Aa basal spacing and chloritelike formulae.
Industry:Mining
An alternating current electric motor with many applications. The rotor is made of strong parallel copper or aluminum bars on the perimeter, joined to end rings of the same metal.
Industry:Mining
An alternating-current electric furnace in which the primary conductor is coiled and generates, by electromagnetic induction, a secondary current that develops heat within the metal charge.
Industry:Mining
An alternative name for the reactive component of an alternating current.
Industry:Mining
An alternative to explosives for breaking down coal in safety lamp mines. The gasification of the Hydrox charge generates sufficient pressure within the shothole to break down the coal. The original plastic disc attached to the charge has been replaced by a metal disc separately seated. The gaseous products from the Hydrox charge are mainly carbon dioxide, nitrogen, and water vapor. The tubes can be recharged underground. The method gives a high yield of +2 in (5.1 cm) in size of coal.
Industry:Mining
An alternative to inductive control is to employ a capacitor in series with the choke and therefore to obtain a leading power factor for the circuit. The current in a capacitive circuit is less affected by changes in voltage than that in an inductive circuit. Therefore, should there be a sudden drop in mains voltage, the capacitively controlled lamp is less likely to be extinguished than the inductively controlled lamp.
Industry:Mining
An aluminosilicate of calcium, magnesium, and potassium having the composition of chabazite.
Industry:Mining
