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gold mining sulphides

gold mining sulphides

Recovery of gold in sulfide ores has fallen into several categories First is froth flotation and second is cyanidation of the ores Using cyanide to recover gold from sulfide ores generally results in 30 to 35 recovery and the best I have heard of is around 50 recovery

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  • differences in processing sulfide and oxide gold ores

    differences in processing sulfide and oxide gold ores

    gold processing Mining and concentrating Britannica Online The nature of the ore deposit determines the mining and mineral processing techniques applied Oxide ore base metal sulfide goldbearing ores and »More detailed

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    The product of melted sulfides is called a matte and is highly corrosive liquid Converting that molten sulfide matte to metal is called smelting Small scale smelting can be done in a crucible – in fact that is what a fire assay is When smelting assays are done on high sulfide ores a couple of iron nails are added to the mix

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    Much of the Gold mined is from large mining operations where the Gold is smeltered for commercial use and although many commercial gold mines exist mineral specimens and crystals are hard to come across China and South Africa have been the worlds two largest Gold producers but collectors will rarely if ever see a Gold specimen from these countries due to the restrictive nature of the

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    Gold is locked into its host mineral due to any of the following factors from La Brooy et al 1994 Physical locking sulphides silicates oxides etc Chemical locking as gold alloys or compounds ie electrum gold tellurides Gold substitution into a sulphide lattice Chemical layer formation causing gold surface passivation

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    Gold in sulfide minerals could be liberated by oxidization using techniques such as roasting high temperature pressure leaching or bacterial leaching Also grinding the ore to an extremely fine particle size can liberate gold encapulsated in sulfides

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    Metallic sulfide mining aka hard rock mining is the practice of extracting metals such as nickel gold and copper from a sulfiderich ore body Sulfides are a geologic byproduct of mining in this area and by exposing sulfides to the air and water in our atmosphere sulfuric acid can be created threatening to poison the nearby water Get

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    Feb 11 2020 · It is primarily a zinc sulfide ore with significant lead and silver and minor amounts of gold and copper The deposit is estimated to be approximately 56 million tons recoverable by open pit mining Mining companies are considering further exploration and are working with Oneida Countys forestry department and the countys mining impact

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    Jul 04 2016 · The Kutemajärvi gold deposit was mined in 19942003 when it produced 13 tons of gold from 14 Mt of ore and was reopened in June 2007 It is owned by Dragon Mining

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