- 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 ...
Characterized by, consisting of, or producing concretions; e.g., a concretionary ironstone composed of iron carbonate with clay and calcite, or a zonal concretionary texture (of an ore) characterized by concentric shells of slightly varying properties due to variation during growth.
Industry:Mining
Charcoal used in pulverized form as dry blacking or in suspension with clay as a black wash; either dusted or coated on the surface of molds to improve the surface.
Industry:Mining
Charge made per unit of ore or concentrate treated by smelter in custom smelting. In addition to a basic charge that allows for process costs and agreed percentage loss in recovery, extra charges may be specified, or remitted as premiums, in adjustment of variations from the normal makeup of the parcel treated.
Industry:Mining
Chart showing depths of water by means of contour lines or by color shading.
Industry:Mining
Chemical action employing a current of electricity to cause or to sustain the action.
Industry:Mining
Chemical analysis based upon the reaction of a volume of standard solution with the material being analyzed.
Industry:Mining
Chemical compound that modifies physical, electrical, or chemical characteristics of surface of solid, also surface tensions of solids or liquids. Used in froth flotation and in detergency. Characteristically, its heteropolar molecules are attracted to a specific type of surface in a mixture where one group forms polar monolayer attachments while the rest of the molecule points outward and changes the relations between the surface and the ambient phase. These relations may change lyophilic and aerophilic attraction, surface tension, intermiscellar grouping, emulsification, and froth foaming. Surfaceactive agents include cleaners (e.g., soaps); water repellants (e.g., greases); dispersants and emulsifiers (e.g., glue); and additives adsorbed at interfaces between liquids (usually aqueous) and external gas, liquid or solid phases, with resulting change in interfacial tension. Three electrochemical types are unionized molecule, anion, and cation. Important characteristics of surface-active agents are solubility in the medium 3187 and effects of specific adsorption at interfaces. Such agents either provide anchorage between phases or form a barrier, according to their flocculating or dispersing effect.
Industry:Mining
Chemical compounds that aid in the control of dry dusts such as coal and silica to help prevent explosions and respiratory injury to workers. These compounds are of two types. One type is used in a dry state and controls dust by absorbing moisture from the air. The second type is an agent for increasing the wetting effectiveness of water by breaking the surface tension and permitting the water-compound mixture to thoroughly cover the treated area.
Industry:Mining
