- 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 ...
An etching reagent developed for use in the investigation of the structure of iron-carbonchromium alloys. It consists of a solution of 10 g potassium ferricyanide, 10 g potassium hydroxide, and 100 mL water.
Industry:Mining
An etching reagent for cast iron that contains picric acid, nitric acid, and water. (Osborne, 1956)
Industry:Mining
An etching reagent for developing the microstructure of chromium steels with more than 5% of chromium. It contains 5 g copper chloride, 100 mL hydrochloric acid, 100 mL alcohol, and 100 mL water.
Industry:Mining
An etching reagent that reveals not only the macrostructure and faults, such as piping, segregation, particularly sulfur and phosphorus, and cracks, but also slip lines in mild steel that has been stressed beyond its elastic limit. Composition is 100 mL of distilled water, 100 mL of concentrated hydrochloric acid, and 40 g of crystallized chromic acid, 16 g of anhydrous nickel chloride.
Industry:Mining
An etching reagent, used in metallographic examination of steels, containing 100 mL methyl alcohol, 18 mL water, 2 mL concentrated hydrochloric acid, 1 g copper chloride, and 4 g magnesium chloride.
Industry:Mining
An evaluation of environmental conditions at a particular facility or site. Major items that could be relevant to an environmental audit for a mining facility may include information on permits, surface and mineral rights, mine ownership and violations, archaeological sites, hydrology issues, air pollution, waste disposal, impoundments, mine fires, underground injections and previously mined areas.
Industry:Mining
An evaporator that produces crystals or other solids, in distinction to one that only concentrates liquids.
Industry:Mining
An even-textured limestone composed almost wholly of relatively uniform calcareous ooliths, with virtually no interstitial material. It is locally an important oil reservoir (such as the Smackover Formation in Arkansas), and is also quarried for building stone.
Industry:Mining
An excavating and loading machine consisting of a digging bucket at the end of an arm suspended from a boom, which extends cranelike from the part of the machine that houses the powerplant. When digging, the bucket moves forward and upward so that the machine does not usually excavate below the level at which it stands.
Industry:Mining
An excavating machine in which a large dipper is operated by steam power. Used for stripping purposes and in open-pit mining, esp. for iron and coal. A similar shovel is now operated by electricity, gasoline, and diesel engines.
Industry:Mining
