biological oxidation of sulphides in gold ore

US5948375A - Biological oxidation of sulphide minerals to ...

A process for treating gold bearing sulphide minerals wherein the minerals are subjected to biological oxidation, the product thereof is separated into light and heavy fractions and gold is recovered from the light fraction using a non-biological process.

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gold sulfide ore oxidation -

Pre-treatment of a refractory gold sulfide ore by means of - SciELO. Biological oxidation (biooxidation) as pre-treatment of refractory gold ores is based ...

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Gold extraction - Wikipedia

Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.

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Biological Oxidation of refractory gold ore - YouTube

Here is a simplified presentation of how gold can be obtained from refractory gold ores using a combination of flotation and bacterial oxidation using thiobacillus ferroxidans.

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Refractory Gold Ore Treatment Methods

Biological oxidation continues to be an important option for sulfide oxidation. In 2003. In 2003. GRD Minproc undertook the basic engineering design for the Laizhou gold project's bacterial leaching system in Shandong Province, which used the Bac l ech technology to treat 200 tpd of sulfide concentrates.

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Biological Oxidation Of Sulphides In Gold Ore - Image Results

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Biological Leaching-Pressure Oxidation for Auriferous ...

The process consisted of biological leaching to partially oxidise sulphides, followed by pressure leaching for complete sulphide oxidation and arsenic precipitation, followed by liquor neutralisation and

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Effect of Pretreatment of Sulfide Refractory Concentrate with ...

more of it than gold in the ore. Oxidation of arsenopyrite ... [7,8], biological oxidation [9- 11], and nitric acid oxidation [12]. ... complex of sulphides (pyrite ...

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Bacterial Oxidation of Refractory Sulfide Ores for Gold ...

The overall oxidation of the sulfides is an important variable for gold recovery. Pilot- and commercial-scale bioleaching processes for gold-containing pyrite and arsenopyrite ores are reviewed.

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Optimisation of processing at the Beaconsfield gold mine ...

The Beaconsfield gold mine processing plant is a complex operation and utilises crushing, grinding, gravity gold concentration, sulphide flotation, bacterial oxidation, cyanidation and zinc cementation to recover gold from the partially refractory ore.

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Improvements in gold ore cyanidation by pre-oxidation with ...

For the possible use on pre-oxidation of ore containing sulphides, both the direct oxidation of the sulphides and the reaction driven by the O 2 generated by decomposition of H 2 O 2 are useful possible mechanisms.

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