- Industry: Mining
- Number of terms: 33118
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- 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 ...
In flotation, a chemical that increases the specific attraction between collector agents and particle surfaces, or conversely, that increases the wettability of those surfaces.
Industry:Mining
In flotation, a method employing an impeller, of which the principal function is to keep the pulp in suspension, and a port for admission of air below the surface of the pulp, this port of entry being in the vicinity of the impeller.
Industry:Mining
In flotation, a method for treatment of various oxide ores in which the desired base-metal minerals are sulfidized, then the ore is floated as if it were a sulfide ore. It is useful in treating lead carbonate ores, less useful if other lead minerals are present, and of limited utility in connection with copper and zinc ores.
Industry:Mining
In flotation, a method for treatment of various oxygen ores using carboxylic acids as collectors with gangue depressants to float base-metal minerals from associated impurities. The process is suitable for processing apatite (phosphate), carbonates or oxides of lead, copper, or zinc; somewhat less useful with other lead minerals and with hemimorphite; and unsuitable for chrysocolla.
Industry:Mining
In flotation, a method in which gas is introduced under slight pressure near the bottom of the flotation vessel, the device used for introduction being either a submerged pipe or a porous cloth, frit, or rubber surface forming the wall of a wind box.
Industry:Mining
In flotation, a method for treatment of various oxygen ores where sulfhydryl collectors are used to float the base-metal minerals from associated minerals.
Industry:Mining
In flotation, a method in which the pulp, saturated with air at atmospheric pressure, is allowed to rise to a height above the normal hydrostatic level of the pulp. In the course of this ascent, the dissolved gases precipitate from solution and form a vast number of very tiny bubbles that attach themselves selectively to the hydrophobic solids.
Industry:Mining
In flotation, a surface-active substance that has the active constituent in the positive ion. Used to flocculate and to collect minerals that are not flocculated by the reagents, such as oleic acid or soaps, in which the surface-active ingredient is the negative ion. Reagents used are chiefly the quaternary ammonium compounds; e.g., cetyl trimethyl ammonium bromide.
Industry:Mining
In flotation, an amine or related organic compound capable of producing positively charged hydrocarbon-bearing ions (hence the name cationic collector) for the purpose of floating miscellaneous minerals, including silicates.
Industry:Mining
