- 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 mechanical refrigerating system used for air cooling in the warm season of the year, which, when the evaporator and condenser effects are reversed, absorbs heat from the outside air or water in the cold season of the year and raises it to a higher potential so that it also can be used for heating.
Industry:Mining
A mechanical roasting furnace similar to the Ross and Welter type.
Industry:Mining
A mechanical sampler consisting of a cast-iron plate revolving in a vertical plane on a horizontal axis, and having an inclined sample spout passing through the flange. The ore to be sampled comes to the sampler by way of an inclined chute and impinges upon the flange of the sampling disk. Whenever the sample spout comes in line with the ore stream, the ore passes through the plate and into the sample; at all other times the ore is deflected from the plate and drops into the reject. Generally, the sampler makes from 10 to 30 rpm, and removes about 1/5 of the ore stream.
Industry:Mining
A mechanical sampling device that automatically selects 1/625 part of the ore passing through the sampler, by means of an oscillating deflector placed in a falling stream of the ore.
Industry:Mining
A mechanical sampling device that automatically selects one twenty-fifth or one sixtyfourth of the ore passing through.
Industry:Mining
A mechanical shovel able to operate as a forklift truck, a crane, or a loader.
Industry:Mining
A mechanical single-shot borehole-surveying instrument for use where exceptionally high temperatures are encountered in a hole. It records the compass bearing and inclination of a borehole by making a dot on a special paper by means of a plumb bob, incorporating a depressible stylus.
Industry:Mining
A mechanical stoker or device for firing a furnace that allows the coal to coke before feeding it to the grate, thus burning the fuel with little or no smoke.
Industry:Mining
A mechanical stoker suitable for small boilers, such as the vertical, water-tube, and locomotive types. Coal is conveyed direct from a bunker or hopper by a feed worm, which forces the fuel up through the bottom of the retort in which it is burned. Volatiles driven off must pass through the ignited fuel, thus eliminating smoke. An underfeed stoker operates most successfully on graded coals with an upper size limit of 1 to 2 in (2.5 to 5.1 cm).
Industry:Mining
A mechanical, cylindrical, multiple-deck muffle furnace of the McDougall type for smelting ores.
Industry:Mining
