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United States Bureau of Mines
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 ...
Hard steel or tungsten-carbide-tipped cutting teeth used in an auger run on a torque bar or in an auger-drill head run on a continuous-flight auger.
Industry:Mining
Hard water that cannot be softened by boiling; water containing magnesium sulfate or calcium sulfate.
Industry:Mining
Hard, fibrous masses of hematite that can be split up into thin rods.
Industry:Mining
Hardened cement material filling a portion of a borehole.
Industry:Mining
Hardened-steel bushing inserted in the face of a jig to serve as a guide for drills.
Industry:Mining
Hardness of water that cannot be removed by boiling. Opposite of temporary hardness.
Industry:Mining
Hardpan; Isle of Man, U.K.
Industry:Mining
Hard-surfacing of steel by heating above the critical temperature in an inert atmosphere with a source of carbon (e.g., cyanide salts), thus forming a cementite casing above a tough core (which has already been machined).
Industry:Mining
Has two pairs of rolls, mounted in one stand, one pair of rolls being higher than, and in advance of the other.
Industry:Mining
Hat-shaped metal guides for ropeways around bends.
Industry:Mining