Gold cyanidation - Wikipedia
Gold cyanidation is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. Production of reagents for mineral processing to recover gold copper zinc and silver represents approximately 13% of cyanide consumption globally with the remaining 87% of cyanide used in other industrial processes such as plastics adhesives and pesticides. Due to the highl
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Kyrgyzstan Kumtor Gold Mine 1998: A truck carrying 2 tons of sodium cyanide crashed into the Barskoon river resulting in more than 2000 people seeking medical care. Romania Aural Gold 2000 : A tailings dam ruptured spilling 3.5 million cubic feet of cyanide-contaminated waste into the Tisza and Danube Rivers killing fish and poisoning water supplies as far as 250 miles downriver in Hungary and Yugoslavia.
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This paper reviews a series of alternative lixiviant systems for the recovery of gold from ores and concentrates. For over 100 years cyanide has been the leach reagent of choice in gold mining because of its high gold recoveries robustness and relatively low costs. The environmental damages resulting from its mismanagement however have initiated widespread research aimed at identifying and developing less toxic leaching agents.
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The following is a guest feature written by CyanoGuard one of the 15 startups selected to participate in Prospect Mining Studio’s 2020 cohort. Gold extraction using cyanide was first introduced ...
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