- 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 ...
A type of pyrometer that measures high temperature by comparing the intensity of light of a particular wavelength from the hot material with that of a filament of known temperature. It is used to determine the temperature of incandescent lavas.
Industry:Mining
A type of quartz twinning in which the two or more intergrown parts are related as by a rotation of 180 degrees about the common Z = c axis. The separate individuals of the twin are either all right handed or all left handed. Electrical twinning cannot be detected by optical tests, but can be recognized by etching, X-ray study, pyroelectric tests, or the distribution of the x 5161 or s 1121 faces.
Industry:Mining
A type of quartz twinning in which the two or more intergrown parts are related as by a rotation of 180 degrees about the common Z = c axis. The separate individuals of the twin are either all right handed or all left handed. Electrical twinning cannot be detected by optical tests, but can be recognized by etching, X-ray study, pyroelectric tests, or the distribution of the x 5161 or s 1121 faces.
Industry:Mining
A type of quartz twinning in which the two or more intergrown parts are related as by a rotation of 180 degrees about the common Z = c axis. The separate individuals of the twin are either all right handed or all left handed. Electrical twinning cannot be detected by optical tests, but can be recognized by etching, X-ray study, pyroelectric tests, or the distribution of the x 5161 or s 1121 faces.
Industry:Mining
A type of refined hydrated lime, which has been milled to be suitable for plastering, particularly a finish coat.
Industry:Mining
A type of refraction seismic shooting used to determine the structure across the strike. The broadside lines are ordinarily laid out in conjunction with the standard-type profiles that run along the strike. The shot points and detector spreads are laid out along parallel lines, which are generally across the strike. The distance between each line of shots and the receiving line is chosen so that it will always be greater than the double offset distance for the refractor being followed. Generally the distance should be only slightly greater so that the primary refracted event will be received as a second arrival. When this spacing is used, the refracting point associated with the shot will be very close to that associated with the detector, and each delay time will be approx. half the intercept time. A single depth point (based on half the intercept time) is then plotted midway between shot and receiver. All depth points are thus placed along the "control lines" that are located halfway between the shooting line and the receiving line.
Industry:Mining
A type of rock drill in which water is fed into the drill hole through the hollow drill steel to remove the drill cuttings and, at the same time, allay the dust. Also known as Leyner- Ingersoll drill.
Industry:Mining
A type of roller bit with cutter cones arranged to cut an annular ring leaving an uncut section in the center as core.
Industry:Mining
A type of roller conveyor in which the rolls are of conical or tapered shape with a diameter at the ends of roll larger than at the center.
Industry:Mining
A type of rolling mill in which the stock being mechanically worked by rolling passes backwards and forwards between the same pair of rolls, which are reversed between each pass.
Industry:Mining
