- 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 machine embodying a weight that is lifted and dropped upon the material being rammed.
Industry:Mining
A machine employed in soil stabilization comprising two nearly touching half drums, which rotate in opposite directions and break up the soil.
Industry:Mining
A machine for breaking down ore, rock, or coal and to discharge the crushed material below.
Industry:Mining
A machine for charging a shaft furnace, consisting of an iron hopper with a large central opening, which is closed by a cone or bell pulled up into it from below. In the annular space around this cone, the ore, fuel, etc., are placed, then the cone is lowered to drop the materials into the furnace, after which it is again raised to close the hole.
Industry:Mining
A machine for charging a shaft furnace, consisting of an iron hopper with a large central opening, which is closed by a cone or bell pulled up into it from below. In the annular space around this cone, the ore, fuel, etc., are placed, then the cone is lowered to drop the materials into the furnace, after which it is again raised to close the hole.
Industry:Mining
A machine for charging a shaft furnace, consisting of an iron hopper with a large central opening, which is closed by a cone or bell pulled up into it from below. In the annular space around this cone, the ore, fuel, etc., are placed, then the cone is lowered to drop the materials into the furnace, after which it is again raised to close the hole.
Industry:Mining
A machine for cleaning coal and other materials that uses a dense fluid in which the coal floats and shale sinks. The fluid consists of water intimately mixed with sand (or finely ground magnetite or even shale) and agitated to maintain its consistency. The fluid has an effective specific gravity of 1.3 to 1.9. In general, coal from about 8 in (20.3 cm) down to 1 in (2.54 cm) is washed by dense medium, below 1 in by Baum washer, and below 0.75 mm (where cleaning is necessary) by froth flotation. Magnetite as the dense medium solid is preferred as it can be easily recovered by magnetic separators and also the upper limit of the specific gravity is higher (up to 2.0).
Industry:Mining
A machine for compressing molten steel in casting to improve the quality of the product.
Industry:Mining
