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Dense media separation (DMS) is used to further separate the desired ore from rocks and gangue minerals. This will stratify the crushed aggregate by density making separation easier. Where the DMS occurs in the process can be important, the grinders or mills will process much less waste rock if the DMS occurs beforehand.
The COLEX separation method makes use of this by passing a counter-flow of lithium-mercury amalgam flowing down and aqueous lithium hydroxide flowing up through a cascade of stages. The fraction of lithium-6 is preferentially drained by the mercury, but the lithium-7 flows mostly with the hydroxide.
Primary ores are also extracted through dense media separation (DMS), which is a technique that involves the removal of gangue through the variation of specific gravity within particles. [12] The dense minerals (high specific gravity) containing primary ores sink, and the lighter gangue minerals float to the surface. [12]
Rather than using heating processes to concentrate the ore, Wilfley had been experimenting on mineral separation by use mineral density contrasts. [ 6 ] Wilfley was able to perfect a mechanical solution for the recovery of gold and silver from low-grade ores by means of the Wilfley table.
Lithium-6 is valued as a source material for tritium production and as a neutron absorber in nuclear fusion. Natural lithium contains about 7.5% lithium-6 from which large amounts of lithium-6 have been produced by isotope separation for use in nuclear weapons. [189] Lithium-7 gained interest for use in nuclear reactor coolants. [190]
Sepro Mineral Systems Corp. is a Canadian company founded in 1987 and headquartered in British Columbia, Canada.The outcome of the acquisition of Sepro Mineral Processing International by Falcon Concentrators in 2008, [1] the company's key focus is the production of mineral processing equipment for the mining and aggregate industries. [2]
Lithium tungstate is used to produce high density aqueous polytungstate (metatungstate) solutions. Like other high density fluids, such solutions are often used in the separation of minerals and other solids. These can achieve a density of 2.95 at 25 °C and up to 3.6 in hot water. [3]
Generally considered a universal drying agent in polar and nonpolar media; [12] separation of natural gas and alkenes, adsorption of water in non-nitrogen sensitive polyurethane: 5A-DW: 5: 0.45–0.50: 21–22: 0.3–0.6: Degreasing and pour point depression of aviation kerosene and diesel, and alkenes separation 5A small oxygen-enriched: 5: 0 ...