- 行业: Mining
- Number of terms: 33118
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- 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 ...
A cavity lined with refractory material used in metal working to enclose large ingots, in order to preserve them at a high temperature, and thus avoid the necessity of reheating.
Industry:Mining
A cavity of irregular shape in certain plutonic rocks. Crystals of the rock constituents sometimes project into the cavity. Compare: druse; vug.
Industry:Mining
A cavity of variable shape in a lava, formed by the entrapment of a gas bubble during solidification.
Industry:Mining
A cavity, with or without negative crystal faces, containing one or two fluid phases, and possibly one or more minute crystals, in a host crystal. If two fluid phases are present, the vapor phase (bubble) may show Brownian motion.
Industry:Mining
A cell containing a diaphragm or other means for physically separating the anolyte and catholyte.
Industry:Mining
A cell in which the solids-water pulp feed is kept agitated, and is circulated by means of an impeller mounted at the bottom of a vertical shaft. The rotating impeller creates vacuum enough to draw air down the standpipe surrounding the impeller shaft, and the impeller disperses the air throughout the pulp in the form of small bubbles. The flotable minerals are carried upward by the bubbles and eventually collect in the froth above the pulp in the machine. Automatic scrapers remove the mineral-laden froth that contains the concentrate, and after the values have been removed, the barren pulp containing the tailing flows out of the cell.
Industry:Mining
A cement in which there is only limited generation of heat during setting, achieved by modifying the chemical composition of normal portland cement.
Industry:Mining
A cement made from bauxite and lime in an electric furnace; it hardens rapidly. Sometimes called ciment fondu.
Industry:Mining
A cement produced by grinding together portland cement clinker and a pozzolana, or by mixing together a hydrated lime and a pozzolana.
Industry:Mining
