- 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 ...
Apparatus used to measure dust in mine atmosphere. A measured volume of air is drawn through a jet so as to impinge on a glass surface coated with glycerin jelly. The adherent dust is then examined and the particles are counted under the microscope.
Industry:Mining
Apparatus used to measure dust in mine atmosphere. A measured volume of air is drawn through a jet so as to impinge on a glass surface coated with glycerin jelly. The adherent dust is then examined and the particles are counted under the microscope.
Industry:Mining
Apparatus used to measure settling rate of small particles dispersed in liquid. One scalepan is immersed in the mixture, and the balance is adjusted by increasing the counterweight at suitable time intervals. Alternatively, a float is suspended, and the compensating external weight is reduced as the density of the suspension surrounding the float is reduced by settlement of its solids.
Industry:Mining
Apparent fault-block displacement in which the blocks have not rotated relative to one another, so that features that were parallel before movement remain so afterwards. Compare: rotational movement See also: translational fault
Industry:Mining
Apparent fault-block displacement in which the blocks have rotated relative to one another, so that alignment of formerly parallel features is disturbed. Compare: translational movement
Industry:Mining
Apparently monosymmetric feldspars with a notable amount of soda may be called soda orthoclase. When the soda equals or exceeds the potash, the crystals exhibit triclinic symmetry and are soda microcline.
Industry:Mining
Appliance for recording the working time of machines such as cutter loaders, conveyors, etc. A vibrating type, fitted on the equipment itself, marks on a chart a straight line when the machine is idle and an oscillating one when working.
Industry:Mining
Appliance in which froth flotation of ores is performed. It has provision for receiving conditioned pulp, aerating this pulp and for separate discharge of the resulting mineralized froth and impoverished tailings. Types of cell include (1) agitation (impeller, and splashing, now obsolete); (2) pneumatic (in which air blown in agitates pulp), such as Hallimond laboratory cell, Callow, McIntosh, Forrester, Southwestern, and Britannia; (3) vacuum cells (Elmore and Clemens, obsolescent); (4) subaeration with mechanized stirring and pressure-input air (M.S. cell, Agitair); (5) subaeration, self-aerating mechanized cell (Fagergren, Denver, M.S.S.A., Humboldt, Boliden, K.B., etc.)
Industry:Mining
Appliance used in engineering to measure power as output, input, or transitional.
Industry:Mining
Appliances to damp deposits of dust in tunnels and workings before and after shotfiring and loading operations. Water sprays are also used along dusty roadways. Various types of mist projectors and atomizers are used and effect considerable improvement, but the dust trapped consists chiefly of the coarser particles. In many dusty mines, a water pipe system extends throughout the workings and sprays are employed at all loading and other dusty points. Sprays are also used to suppress dust at coal and ore processing plants.
Industry:Mining
