- 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 ...
A laboratory for examining ores, usually gold and silver ores, in order to determine their economic value.
Industry:Mining
A laboratory grinding mill with two circular plates almost parallel, of which one is fixed while the other rotates. Ore fed centrally between the plates is ground and discharged peripherally. The disk breaker (obsolescent) had two saucer-shaped disks working in similar fashion.
Industry:Mining
A laboratory instrument used for measuring the relative weight strength of an explosive material. Also, a test in which a standard weight of explosive is placed within a small borehole fitted with a projectile. The mortar, suspended on a pendulum, recoils upon detonation. The recoil is a measure of the weight strength in percentage (relative to a standard whose value is 100) or pendulum deflection.
Industry:Mining
A laboratory method of indicating the degree of caking, coking, or binding together of a coal when a sample is heated in a prescribed manner.
Industry:Mining
A laboratory method of indicating the degree of caking, coking, or binding together of a coal when a sample is heated in a prescribed manner.
Industry:Mining
A laboratory procedure used in investigating the floatability of minerals. A few grains, sized between 60 and 120 mesh, are placed, after suitable surface cleansing, under water in an observation cell which is controlled for pH, reagent concentration, temperature, and conditioning time. An air bubble is pressed down on the particles and then raised; the degree and tenacity with which they cling to it are observed.
Industry:Mining
A laboratory test of the coking properties of coal, in which a determination is made of the strength of buttons made by coking a mixture of powdered coal and 15 to 30 times its weight of sand.
Industry:Mining
A laborer responsible for heating rivets in a portable forge and throwing them with tongs to the rivet catcher.
Industry:Mining
A laborer who calls out the number chalked on each loaded mine car, as it is run on scales for weighing, so that the weighmaster can identify for pay purposes the miner who loaded the car.
Industry:Mining
