- 行业: 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 hydraulic fluid coupling transmits power from the driving member to the driven member through oil. A rotating impeller attached to the drive shaft throws oil directly against a turbine converter, which always delivers the same torque as the engine or motor produces. Fluid couplings are particularly advantageous in starting heavy loads since the motor or engine is permitted to run at high efficient speeds while the coupling output shaft gradually accelerates the load to running speed.
Industry:Mining
A hydraulic mining system consisting essentially of drilling a hole down the pitch of the vein, replacing the drilling head with a jet cutting head, and then retracting the drill column with the jets in operation to remove the coal. Coal cut loose by the jets drops to a flume drift and is carried by water to a screening and loading plant.
Industry:Mining
A hydraulic piston and cylinder mechanism that can be attached to a rotary-drill feedoff line and adjusted to allow the drill stem to feed downward while maintaining a constant preset tension on the drill string.
Industry:Mining
A hydraulic prop that is basically a self-contained hydraulic jack with an integral pump unit built into the prop. It is designed to yield at 25 st (22.7 t) and has a setting load of 6 st (5.4 t).
Industry:Mining
A hydraulic pump supplying oil under pressure to the hydraulic-feed cylinders and pistons of a hydraulic-type swivel head on a diamond drill.
Industry:Mining
A hydrometer indicating the specific gravity or relation of the weight of a given liquid per unit volume to the weight of a given unit volume of water.
Industry:Mining
A hydrometer specially graduated to indicate directly the percentage of a salt (as common salt) in a brine or other salt solution.
Industry:Mining
A hydrophilic group. In the sulfate ester, an oxygen link is provided, forming the acid group of many commercial surface-active agents in which a little sulfonic acid and much long-chain sulfate ester are linked to fatty acids and oils. Examples of reagents used in mineral processing include Lissapol LS (sodium salt of oleic acid chloride and panisidine sulfonic acid); and Aerosol (sulfosuccinic acid diester).
Industry:Mining
A hydrophone whose response is essentially independent of angle of arrival of the incident sound wave.
Industry:Mining
