- Industry: Mining
- Number of terms: 33118
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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 ...
In uranium leach treatment, the bulk of the barren solution after some 75,700 L of highnitrate solution have been run through the ion-exchange (IX) column. Low in nitrate and uranium and contains some backwash water.
Industry:Mining
In valuation of gold lodes, the product of the width of the exposure of ore, measured normal to the containing host rock, and the assay value in pennyweights of a true sample of the ore, cut evenly along the measured line. In evaluation of ore tonnages in basemetal mining, the equivalent measurement is the assay-foot or similar convenient combination across the exposed lode. Abbrev., in. dwt.
Industry:Mining
In Vermont, large wooden blocks covered with felt pads that are propelled back and forth by means of a crank and pitman. Used for polishing monumental stone.
Industry:Mining
In Wales, fine screenings used in making pitch-bonded briquets and for mixing with bituminous coal to be burned in cement kilns, on chain grate stokers, and as powdered fuel.
Industry:Mining
In welding, a split joint formed by inserting a wedge-shaped piece into a corresponding split piece and welding the two together.
Industry:Mining
In winding, shock loads produced by picking up a cage from the pit bottom with slack chains or by lifting heavy pithead gates or covers. This often causes dry fatigue in the winding ropes.
Industry:Mining
Inadequately financed operation, depending on hand-to-mouth existence. Mining from surface down to bedrock. At grass; at surface. Also known as mining on a shoestring.
Industry:Mining
