Biological Oxidation Of Sulphides In Gold Ore

Sulphide Gold Ore Treatment by Leaching and Flotation Process

Sulphide Gold Ore Treatment by Leaching and Flotation Process Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore , at the least capital cost and at the same time obtain the highest net return

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Bacterial Oxidation of Refractory Sulfide Ores for Gold

27/09/2008 · The microbiological leaching of refractory sulfide ores (pyrite, arsenopyrite) for recovery of gold is reviewed in this article The underlying physiological, biochemical, and genetic fundamentals of the bacteria involved (Thiobacillus and Sulfolobus spp) are

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Improvements in gold ore cyanidation by pre-oxidation with

Usually the kind of gold ores containing sulphidic minerals – depending on the sulphide content and mineralogy – can be pre-treated by oxidation steps prior to cyanidation, converting the sulphides to oxides or sulphates, in some cases enhancing the opening up of the ore

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ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

80% sulfide oxidation is suitable for good liberation of the gold and that oxygen utilization greater than 5% is difficult to achieve The oxygen pressure oxidation of total ore uses a

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Pretreatment Process on Refractory Gold Ores with As

Cigna corporation has made experiments on gold ore of most deposit in the world 20) The result showed that the effect on ore bearing sulphur of 1%–50% was good and time of oxidation pretreatment was short But it is not beyond the scope of high temperature and pressure

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Biological oxidation of iron sulfidesScienceDirect

The biological oxidation of minerals and ores, called bioleaching, has been studied for the last decades to solubilize metals and recover them In particular, iron sulfides are the most studied ores for an optimum extraction of different metals, such as copper or zinc

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The Production of Soluble Ferric Sulfate via Biological

However, the common goal is to use biological oxidation to liberate a valuable material (eg Gold locked in arsenopyrite or pyrite) Much less attention has been paid to production of soluble iron for leaching of other minerals or for use as a precipitant

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Sulphide Gold | Gekko

Pre-concentration of coarse 350 – 500 micron sulphide-associated gold ore, using the InLine Pressure Jig, is required to reject gangue from the high value material The IPJ , a classic pre-concentration device, is effective in gangue rejection prior to further processing of valuable gold-bearing material

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Recovery of Gold in Pyritic Sulfide Oresmine-engineer

Sulfide ores, and pyrites in particular, have caused and continue to cause difficulty in recovering the gold values from these ores In most instances, visible gold can not be seen under microscopic examination of pyrite gold ores

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Bacterial Oxidation of Refractory Sulfide Ores for Gold

27/09/2008 · Gold is finely disseminated in refractory sulfide ores, thereby decreasing Au recoveries upon conventional cyanidation for gold dissolution In the bioleaching process, bacteria remove the sulfide minerals by oxidative dissolution and thus expose Au to extraction with cyanide solution

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US5948375ABiological oxidation of sulphide minerals to

Biological oxidation of sulphide ores, especially pyritic gold ores, has been known for some time and there are many references in the literature to ore processing in this way

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Leachox™ Refractory and Sulphide Gold Process | Maelgwyn

The gold is normally present in refractory gold sulphide ores containing mainly pyrite, arsenopyrite or pyrrhotite and occurs in both the chemically bonded state and as micro or nano-size grains of metallic gold

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oxidation of gold oresicas2017conference

Optimum results to date for rougher concentrate occurred at an oxidation time of 24 hours, a reaction temperature of 75186;C, and a particle size of 150 microns, giving a sulfide oxidation percentage of 60% and recoveries of 85% gold and 82% silver

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The biological oxidation of carbonaceous material in the

Download Citation on ResearchGate | The biological oxidation of carbonaceous material in the treatment of a refractory gold bearing ore | Much of the research regarding the use of bacteria for the

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Effect of Pretreatment of Sulfide Refractory Concentrate

more of it than gold in the ore Oxidation of arsenopyrite oxidative pretreatment is essential to oxidize sulfides and to expose gold to the leaching solution Pyrometallurgi- clude pressure oxidation [7,8], biological oxidation [9- 11], and nitric acid oxidation [12]

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Blasting hazards of gold mining in sulfide-bearing ore bodies

Two recent unplanned detonations occurred during blasting operations in sulfide-bearing ores in a Nevada surface gold mine Other premature detonations have also reportedly occurred at other Nevada, California, and Arizona operations within the past few years, with increasing frequency

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Sulphide Gold | Gekko

Pre-concentration of coarse 350 – 500 micron sulphide-associated gold ore, using the InLine Pressure Jig, is required to reject gangue from the high value material The IPJ , a classic pre-concentration device, is effective in gangue rejection prior to further processing of valuable gold-bearing material

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Biooxidation of an arsenic-bearing refractory gold ore

Biological oxidation of a refractory arsenic-bearing gold ore was investigated to determine the fate of arsenic during processing and to assess the effect of biological pretreatment on gold extraction

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Gold extractionWikipedia

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 sulphide minerals to recover gold

Biological oxidation of sulphide ores, especially pyritic gold ores, has been known for some time and there are many references in the literature to ore processing in this way

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Biological oxidation of sulphide minerals to recover gold

07/09/1999 · Biological oxidation of sulphide ores, especially pyritic gold ores, has been known for some time and there are many references in the literature to ore processing in this way

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oxidation of gold oresicas2017conference

Optimum results to date for rougher concentrate occurred at an oxidation time of 24 hours, a reaction temperature of 75186;C, and a particle size of 150 microns, giving a sulfide oxidation percentage of 60% and recoveries of 85% gold and 82% silver

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ALTA Gold 2012 E-Docalbionprocess

‘locked’ in sulphide minerals The majority of gold ores are classified refractory because the gold determined by the reaction conditions which range from mild in alkaline leaching and biological leaching to the aggressive conditions found in pressure oxidation The gold and sulphur (sulphides and elemental sulphur) grades relate

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Fungal-transformation of surrogate sulphides and

Abstract In the recovery of gold from refractory gold ores, pretreatment is required to decompose sulphides and liberate occluded gold before cyanidation, and to deactivate carbonaceous matter and prevent it from adsorbing dissolved gold

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Method for gold extraction from thrust sulphide ore

The technical result of the method of extraction of gold from refractory sulfide ores is the simultaneous action of neutralizing alkali and oxygen to elemental sulfur In the interaction of alkali and elemental sulfur, the formation of alkaline sulfides and thiosulfates

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Biooxidation of gold-bearing sulfide ore and subsequent

27/07/2016 · The stages of the ore processing were biooxidation, gold extraction by cyanidation or thiosulfate leaching, and biological destruction of cyanide The gold and silver recovery rates by cyanidation were 640 and 573%, respectively

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Blasting hazards of gold mining in sulfide-bearing ore bodies

Two recent unplanned detonations occurred during blasting operations in sulfide-bearing ores in a Nevada surface gold mine Other premature detonations have also reportedly occurred at other Nevada, California, and Arizona operations within the past few years, with increasing frequency

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Pretreatment Process on Refractory Gold Ores with As

Cigna corporation has made experiments on gold ore of most deposit in the world 20) The result showed that the effect on ore bearing sulphur of 1%–50% was good and time of oxidation pretreatment was short But it is not beyond the scope of high temperature and pressure

Get Latest Price
Recovery of Gold in Pyritic Sulfide Oresmine-engineer

Sulfide ores, and pyrites in particular, have caused and continue to cause difficulty in recovering the gold values from these ores In most instances, visible gold can not be seen under microscopic examination of pyrite gold ores

Get Latest Price