- 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 ...
Crude, dark-colored sulfur containing up to 1% oil or carbonaceous material.
Industry:Mining
Crushed particles of a given size range are placed in a ball mill; the reduction in size of particles for a given number of revolutions of the mill is interpreted in terms of a grindability index.
Industry:Mining
Crushed stone for surfacing macadamized roads, and for the base course of asphalt and concrete roadways; also used without asphaltic binder as the traffic-bearing surface, generally on secondary roads.
Industry:Mining
Crushing in such a manner as to cause one ingredient of the feed to be crushed preferentially to others.
Industry:Mining
Crushing of intergrown material to free the constituent materials.
Industry:Mining
Crushing rolls used in ore breaking. Two parallel cylinders, mounted horizontally, are held apart by shims, and pressed together by powerful springs. Crushable rocks falling between them are drawn down as the cylinders revolve, but unbreakable material causes the springs to yield and let it pass without damage.
Industry:Mining
Crushing under conditions of speed and feed such that there is plenty of room for the fine ore to drop away from the coarser part and thereby escape further fine crushing. Compare: choke crushing
Industry:Mining
Crystal having no symmetry elements, or only an inverse center. The typical crystal has three unequal axes, no two of which are perpendicular.
Industry:Mining
Crystal modification of quartz, which is formed by heating clay silica bodies at temperatures above 1,100 degrees C. Heating increases the thermal expansion and decreases the danger of crazing.
Industry:Mining
