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copper sulfide bearing gold concentration

Treatment of a refractory gold—copper sulfide concentrate ...

2001-6-1  Treatment of a refractory gold-copper sulfide concentrate by copper ammoniacal thiosulfate leaching 633 It has been reported that the use of lower concentrations of reagents reduces the reagent consumption, but this may be expected to slow the leaching kinetics of gold dissolution as has been reported (Langhans et al., 1992).

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Gold mineralization in Bubin area, Gilgit-Baltistan ...

2018-1-11  The enrichment and depletion of different types of minerals suggest that the magmatic hydrothermal fluids played a key role in copper and lead mineralization with gold concentration. Study of ore minerals in these samples shows association with sulfide-bearing alterations in shear zones.

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High gold concentrations in sulphide-bearing magma under ...

2010-12-19  Assuming that the mantle contains ∼ 690 ppm sulphides (S concentration in the upper mantle is estimated to be about 250 μg g −1; ref. 18), taking a conservative value for the bulk gold ...

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Treatment of copper-rich gold ore by cyanide leaching ...

2015-2-1  Severe interference by the copper containing sulphides with cyanide leaching of gold is observed at ρ (NaCN)≤5 g/L. This is consistent with speciation calculations.

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Optimization and mechanism of gold-bearing sulfide ...

2014-6-5  At the same time, it is proved that the combination reagent of copper sulfate and ammonium sulfate is the effective activator for gold-bearing sulfide ore. The combination reagent of butyl xanthate and ammonium dibutyl dithiophosphate is the effective collector for gold-bearing sulfide ore. Mechanism of activator synergistic effect

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Quantifying the ionic form of gold in sulfide ores ...

2009-10-11  A new thermochemical method is proposed to quantify Au ionic occurrences in sulfide ores, as well as in pyrite, porphyry-copper, and gold ore concentrates. The study of the form in which gold occurs in sulfides is topical due huge losses of metal under the current ore dressing technologies. For example, during Ural pyrite ore dressing, the losses of associated gold reach 80%.

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12. Supergene Ore and Gangue Characteristics

2012-3-8  from pyritic massive sulfides. Likewise, the concentration of native gold in gossan overlying the Flambeau (Wisconsin) ... copper, native gold. Massive sulfide. gossan: goethite, amorphous silica, jarosite, plumbojarosite, ... tation of a variety of Pb- and As-bearing metal sulfate and carbonate minerals (fig. 12–1; table 12–1). Gold ...

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THE EFFECT OF PROCESS VARIABLES ON CYANIDE AND

Traditionally cyanide soluble copper has caused many copper bearing gold ores to be considered as too difficult to process. The exhaustion of simple to process gold resources has changed this view ... % Cu Precipitated Sulfide concentration (mM) Time (min) % Cu Precipitated c(S) 5

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Gold in Minerals and the Composition of Native Gold

2012-4-17  elements; next highest are for the sulfide min­ erals. Gold TABLE 1.-Major gold-bearing minerals Varieties: Au. Cubic, sp gr 19.3 (pure Au), decreasing with ircreasing con­ tent of Ag. Form!;; a complete series of solid solutions with silver (see electrum

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Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  noted that copper sulphide bearing gold ores yielded poor gold extraction and demanded high reagent dosages for their treatment. MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2% Cu, 5

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copper sulfide bearing gold concentration

Copper sulfate and sulfuric acid can activate pyrite and arsenopyrite and ... gold from refractory gold-bearing sulfide ore 5,34–36 . ... grade and were diluted in water to a concentration

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Treatment of copper-rich gold ore by cyanide leaching ...

The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. ... Increasing the concentration of NH 3 improves the selectivity and extent of gold extraction and reduces the cyanide consumption. The contribution of reagent interactions to gold extraction is ...

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12. Supergene Ore and Gangue Characteristics

2012-3-8  from pyritic massive sulfides. Likewise, the concentration of native gold in gossan overlying the Flambeau (Wisconsin) ... copper, native gold. Massive sulfide. gossan: goethite, amorphous silica, jarosite, plumbojarosite, ... tation of a variety of Pb- and As-bearing metal sulfate and carbonate minerals (fig. 12–1; table 12–1). Gold ...

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THE EFFECT OF PROCESS VARIABLES ON CYANIDE AND

Traditionally cyanide soluble copper has caused many copper bearing gold ores to be considered as too difficult to process. The exhaustion of simple to process gold resources has changed this view ... % Cu Precipitated Sulfide concentration (mM) Time (min) % Cu Precipitated c(S) 5

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Simultaneous sulfide oxidation and gold dissolution by ...

Simultaneous sulfide oxidation and gold dissolution by cyanide-free leaching from refractory ... which is able not only to leach gold-bearing sulde minerals, but also gold, in a single unit process. Therefore, the current study presents an investigation of ... especially copper containing gold materials. There are only

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A Review of the Treatment of Copper Bearing Silver Gold ...

Gold ores containing high levels of cyanide-leachable copper minerals, such as covellite, chalcocite, bornite, malachite, azurite, and cuprite have traditionally been difficult to treat economically.

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Optimization and mechanism of gold-bearing sulfide ...

2014-6-5  To be common, sulfide minerals in nature, pyrite and arsenopyrite, are often associated with other metal sulfide ore. At the same time, they are also the carrier minerals of some rare metals such as gold, silver, and platinum group metals [1–3].Pyrite and arsenopyrite are the desired minerals for gold-bearing sulfide ore flotation.

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Gold in Minerals and the Composition of Native Gold

2012-4-17  tions with silver, copper, nickel, palladium, and platinum. In association with the platinum metals, gold occurs as free gold as well as in solid solution. The native elements contain the most gold, followed by the sulfide minerals. Several gold tellurides are known, but no gold

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Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  noted that copper sulphide bearing gold ores yielded poor gold extraction and demanded high reagent dosages for their treatment. MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2% Cu, 5

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Enhancing the flotability of gold-bearing ores by a ...

Gravity concentration in sluice box indicated that the highest recovery of gold and silver were 76.52% and 94.83%, respectively when using ore particle size of 100+150 mesh. ... to the decreasing ...

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copper sulfide bearing gold concentration

Copper sulfate and sulfuric acid can activate pyrite and arsenopyrite and ... gold from refractory gold-bearing sulfide ore 5,34–36 . ... grade and were diluted in water to a concentration

More

12. Supergene Ore and Gangue Characteristics

2012-3-8  from pyritic massive sulfides. Likewise, the concentration of native gold in gossan overlying the Flambeau (Wisconsin) ... copper, native gold. Massive sulfide. gossan: goethite, amorphous silica, jarosite, plumbojarosite, ... tation of a variety of Pb- and As-bearing metal sulfate and carbonate minerals (fig. 12–1; table 12–1). Gold ...

More

THE EFFECT OF PROCESS VARIABLES ON CYANIDE AND

Traditionally cyanide soluble copper has caused many copper bearing gold ores to be considered as too difficult to process. The exhaustion of simple to process gold resources has changed this view ... % Cu Precipitated Sulfide concentration (mM) Time (min) % Cu Precipitated c(S) 5

More

Simultaneous sulfide oxidation and gold dissolution by ...

Simultaneous sulfide oxidation and gold dissolution by cyanide-free leaching from refractory ... which is able not only to leach gold-bearing sulde minerals, but also gold, in a single unit process. Therefore, the current study presents an investigation of ... especially copper containing gold materials. There are only

More

Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  noted that copper sulphide bearing gold ores yielded poor gold extraction and demanded high reagent dosages for their treatment. MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2% Cu, 5

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The Waihi Epithermal Gold-Silver-Base Metal Sulfide-Quartz ...

2002-3-1  The decrease in salinity following dilution favored the transport of gold, silver, and copper as hydrosulfide complexes and led to the deposition of the electrum-bearing Zn-Pb-Fe-Cu-Ag sulfide assemblage over a temperature range of 260° to less than 190°C at

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POLYMETALLIC VEIN AND REPLACEMENT DEPOSITS

2004-2-18  zinc, and copper sulfide minerals that are hosted by and replace limestone, dolomite, or other sedimentary rocks; most massive ore contains more than 50 percent sulfide minerals. Sediment-hosted ore commonly is intimately associated with igneous intrusions in the sedimentary rocks. Emplacement of these intrusions triggered ore formation

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Enhancing the flotability of gold-bearing ores by a ...

Gravity concentration in sluice box indicated that the highest recovery of gold and silver were 76.52% and 94.83%, respectively when using ore particle size of 100+150 mesh. ... to the decreasing ...

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Eliminating Copper from Gold Ore

2015-10-11  Copper minerals, even though minor components of precious metal ores, dissolve in these cyanide leaching solutions, consume cyanide, cause fouling of mill solutions, and thus interfere with the precipitation and recovery of gold.2,3,4 Here is a summary of laboratory investigations on the use of cyanide solutions as extractants for copper

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Gold processing - Mining and concentrating Britannica

2 天前  Gold processing - Gold processing - Mining and concentrating: The nature of the ore deposit determines the mining and mineral processing techniques applied. Oxide ore deposits are frequently of such low grade (e.g., 3 to 10 parts per million) that extensive

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