- 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 ...
An apparatus used for the same purpose as a picking belt and consisting of a flat horizontal rotating annular plate.
Industry:Mining
An apparatus used in mining for bringing pulverized ore into close contact with mercury to extract free metal from it by amalgamation.
Industry:Mining
An apparatus used to determine the relative density, or specific gravity, of a dense media.
Industry:Mining
An apparatus used to prevent or reduce current leakage to the ground when blasting in conducting orebodies, in wet shale or clay, and in underwater blasting, esp. in salt water. The apparatus has no battery and can be used when loading the hole to check if the conducting wires have become damaged during this operation.
Industry:Mining
An apparatus used to prevent or reduce current leakage to the ground when blasting in conducting orebodies, in wet shale or clay, and in underwater blasting, esp. in salt water. The apparatus has no battery and can be used when loading the hole to check if the conducting wires have become damaged during this operation.
Industry:Mining
An apparatus using a gas-permeability method for determination of the average particle diameter of powders. A sample, equal in weight (grams) to the true density of the material, is compacted between two porous plugs in a metal tube, to a known porosity. Air or a suitable gas, under a constant pressure head, is passed through the compressed sample, and rate of flow is measured by a calibrated flowmeter. The average particle diameter of the powder is indicated directly on a self-calculating chart by the liquid height in one arm of the flowmeter tube. No dispersion is required, and the results are unaffected by particle shape.
Industry:Mining
An apparatus, and the building containing it, in which rock is crushed by descending pestles (stamps), operated by water power or steam power. Amalgamation is usually combined with crushing when gold or silver is the metal sought, but copper, tin, and other ores are stamped to prepare them for dressing. The technique is obsolete.
Industry:Mining
An apparatus, and the building containing it, in which rock is crushed by descending pestles (stamps), operated by water power or steam power. Amalgamation is usually combined with crushing when gold or silver is the metal sought, but copper, tin, and other ores are stamped to prepare them for dressing. The technique is obsolete.
Industry:Mining
An apple- to emerald-green, massive, waxlike phosphate, possibly a mixture of wavellite and turquoise.
Industry:Mining
