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Gold extraction refers to the processes required to extract gold from its ores. This may require a . High grade ores and ores resistant to cyanide leaching at coarse particle sizes, require further .. Nitric acid or forced air oven oxidation can also be used to dissolve iron from the electrowinning cathodes before smelting.
Feb 12, 2017 . Once the gold ore has been removed from underground and brought . heap leaching use, treatment of ores with high silver content, and flotation options for sulfides. . if gold bearing iron sulfides, such as pyrite, arsenopyrite, pyrrhotite, .. methods for extraction, depending on the refractoriness of the ore.
Gold Extraction Techniques MGS Precious Metals Blog
Apr 6, 2016 . Extracting gold from ores and alloys has evolved over the centuries to be very efficient. . One of the earliest methods for extracting gold, salt cementation, was perfected through the Iron Age. . Along with mechanized mining, froth flotation allowed the best recovery of gold from much lower grade ore than.