- 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 impact breaker or double impeller breaker uses the energy contained in falling stone, plus the power imparted by the massive impellers for complete stone reduction.
Industry:Mining
The important oxides of uranium are UO<sub>2</sub>, UO<sub>3</sub>, and U<sub>3</sub>O<sub>8</sub>. The dioxide (melting point 2,880 degrees C) is used as a nuclear-fuel element. Uranium oxide has been used to produce red and yellow glazes and ceramic colors.
Industry:Mining
The inclination of a coal seam at which loose coal will not move on the natural bottom, but at which it will slide or can be easily pushed along on iron slides placed on the bottom in the chambers or rooms.
Industry:Mining
The inclination of a normal projection of lineation in the plane of a vertical cross section. Compare: plunge
Industry:Mining
The inclination of the water surface expressed as change of elevation per unit of slope length; the sine of the angle that the water surface makes with the horizontal. The tangent of that angle is ordinarily used; no appreciable error resulting except for the steeper slopes.
Industry:Mining
The inclined crystallographic axis in the monoclinic system, designated a or b in the first setting and a or c in the second. Most mineralogists use the second setting and designate the clinoaxis a.
Industry:Mining
The incompatibility of certain rock-forming minerals, according to the theory of fractional crystallization, results from their being too far apart in a crystallization 145 sequence to be associated in such quantities as to make up the entire rock. Thus, a rock made up of quartz and calcic plagioclase is unknown among igneous rocks.
Industry:Mining
The increase in linear dimensions and volume that occurs when materials are heated and that is counterbalanced by a contraction of equal amount when the materials are cooled.
Industry:Mining
