- 업종: 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 dumper provided with a bucket, hinged by arms to the chassis, that scoops up the material and discharges it backwards into the hopper. Hydraulic rams control the lift arms, bucket movement, and dumping operation.
Industry:Mining
A dunite high in content of titaniferous magnetite and containing shreds of biotite.
Industry:Mining
A dust collector for belt conveyors used at the loading station. The delivery pulley of the main gate conveyor is used to drive a scraper chain. The latter is arranged to run at half the belt speed by means of chains and sprockets, and the scraper chain runs at the bottom of a long hopper to the point where the coal is delivered into the trams. The underbelt fines are collected on the scraper chain after having been released from the belt by means of a snub pulley. The whole arrangement is housed in a sheet-steel cover to which rubber flaps are attached. Side spillage and the escape of dust over the side of the trams is prevented by means of rubber flaps.
Industry:Mining
A dust recovered from blast furnace gases, some of which is valuable for its potash content.
Industry:Mining
A dust sampling instrument comprising a D.V.P. Mark 11 pump with a swept volume of 90 cm<sub>3</sub>. A filter paper is inserted into a bridge behind the inlet nozzle of the pump such that a circle of 1-cm diameter of the filter paper is exposed to the dust. The dust, while passing through the filter paper, produces a stain. The optical density of the stain is determined photoelectrically in a densitometer by the light that falls upon a galvanometer. The dust particle concentration is evaluated by a calibration factor. Its main disadvantage is that it underestimates the number of fine particles.
Industry:Mining
A dust trap in which the clean air flows inwards around the outside of the drill rods, and the dust and chippings are extracted in the airstream passing through the hollow rods. It includes a drum-type dust container with filter units. The appliance requires special rods and bits.
Industry:Mining
