- المجال: 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 six-sided in situ vat containing liquid or gas for ore treatment and recovery of mineral values requiring elevated temperatures and pressure, usually for long periods of time.
Industry:Mining
A size-reduction process in which the ground material is removed either by screening or by a classifier, the oversize being returned to the grinding unit. Typical examples are a dry pan with screens, dry milling in an air-swept ball mill, and wet milling in a ball mill with a classifier.
Industry:Mining
A size-reduction unit depending for its action on collisions between the particles being ground, the energy being supplied by a compressed fluid, (e.g., air or steam) that enters the grinding chamber at high speed. Such mills will give a product of 5 mu m or less; they have been used for the fine grinding of frits, kaolin, zircon, titania, and calcined alumina, but the energy consumed per ton of milled product is high.
Industry:Mining
A sizing screen similar to the shaking screen, but the reciprocating movement imparted to it is of greater frequency and much smaller amplitude--1,000 rpm and 1/4 in (6.4 mm) being typical. High-frequency vibration is more effective than the slow movement of the shaker in preventing blinding of holes, and the screening is more effective. It may contain one, two, or three screen decks with water sprays for washing products when screening. Five products ranging from plus 3/4 in (19.1 mm) to minus 1/8 in (3.2 mm) are possible from a double-deck screen. In general, the screen is inclined at from 12 degrees to 14 degrees for the coarser sizes and 17 degrees to 21 degrees for the finer sizes with counterflow operation.
Industry:Mining
A skid- or crawler-mounted drill operated by electric motor or diesel engine. It is used at quarry or opencast sites for drilling horizontal blast holes 3 to 6 in (7.6 to 15.2 cm) in diameter, and up to 100 ft (30 m) in length, without the use of flush water. It cannot penetrate strong strata.
Industry:Mining
A skilled craftsperson who fabricates ceramic ware using various forming techniques.
Industry:Mining
A skilled member of a team specially trained to erect steel framed buildings, bridges, and other steel structures.
Industry:Mining
A skin disease caused by the application of dust or liquids. In coal mining, the dusts may be coal or stone dust and the liquids may be mine waters, oil or grease, perspiration and acids or alkalis. The majority of cases occur in deep and hot mines having high wet-bulb temperatures.
Industry:Mining
A skip body mounted on nine or more oscillating, smooth, rubber-tired wheels for compaction and fine rolling of soil.
Industry:Mining
