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May 20, 2009 , Minn is the largest open-pit iron ore , ore tailings and extract the iron that , water needed to convert the tailings into a USGS: Mineral Resources On-Line Spatial Data: iron Geochemical data for stream water, sediments, and mine tailings in this area , which has iron ore deposits , most samples are from the continental US ....
Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex...
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Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, terra-cone (terrikon), are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an oreTailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without ....
Seepage from tailings can be prevented or minimized by placing an impermeable barrier, such as clay, at the bottom of the impoundment before tailings disposal Many pre-1970s tailings impoundments did not have such barriers The infiltration of surface water into tailings can be prevented by using reclamation methods that facilitate runoff ....
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Hazardous Properti Toxic chemicals used to extract the valuable materials from the ore, such as the cyanide used in gold mining, remain in the tailings at the end of the process, and may leach out into ground water...
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Jan 31, 2015· The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest environmental liability of the mining industry" [3] These tailings contain large amounts of pyrite (FeS) and Iron(II) sulfide (FeS), which are rejected from the sought-after ores of copper and nickel, as well as coal...
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