- Industria: 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 ...
A method of electrolytic refining of silver. Silver plate of 95% to 98% pure forms the anodes, and thin silver plate forms the cathodes. The electrolyte consists of a weak, acidulated solution of silver nitrate.
Industry:Mining
A method of estimating the effective diameters of particles smaller than 0.06 mm by mixing a sample in a measured volume of water and checking its density at intervals with a sensitive hydrometer. A test may take several days.
Industry:Mining
A method of fighting underground fires developed in the United States, and somewhat similar to the British foam plug. It involves the formation of a high-expansion noncombustible foam. Large volumes of the foam are drawn or blown over and around the fire until it can no longer be sustained due to lack of oxygen. The foam is made from 1500 ammonium lauryl sulfate and 1 gal (3.8 L) of solution is used for each 250 to 300 ft<sub>3</sub>/min (7.1 to 8.5 m<sub>3</sub>/min) of air passing through the net.
Industry:Mining
A method of finding large diamonds in which the dry crushed ore is passed in a thin layer on a moving belt through a band of intense polarized light, which, if reflected from a large diamond, actuates a photoelectric cell, which calls attention to the large diamond.
Industry:Mining
A method of fire control in which water is sprayed or sprinkled in sufficient volume to overwhelm the fire and put it out.
Industry:Mining
A method of forming bricks in sanded molds, from which they are dumped on a board called a pallet.
Industry:Mining
A method of forming refractory shapes, furnace hearths, or other furnace parts by means of pneumatic hammers.
Industry:Mining
A method of fraud carried out by a representative of the seller, by systematically mining out all the low-grade or barren spots in the vein, leaving only the high-grade spots exposed.
Industry:Mining
A method of geochemical prospecting in which samples of soil or other surficial material are tested for traces of the metal desired, its presence presumably indicating a nearsurface orebody.
Industry:Mining
