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cyanidation of a pyrrhotite bea gold ore

(PDF) Cyanidation of a pyrrhotite-bearing gold ore

The Musselwhite Mine in Canada processes a free milli ng gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improv e cyanidation. The pyrrhotite

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[PDF] Cyanidation of a pyrrhotite-bearing gold ore ...

The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. A leach using 8ppm dissolved oxygen yielded only 82.3% gold extraction with a 0.29kg/t NaCN consumed. The addition of lead nitrate, directly to the leach ...

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Cyanidation of a pyrrhotite-bearing gold ore

2015-12-27  The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. A leach using 8ppm dissolved oxygen yielded only 82.3% gold extraction with a 0.29kg/t NaCN consumed.

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cyanidation of a pyrrhotite bearing gold ore

PDF Cyanidation of a pyrrhotite-bearing gold ore . Cyanidation of a pyrrhotite-bearing gold ore. The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. Get Price

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Cyanide Leaching and Decomposition of Pyrrhotite

2015-10-14  An EXAMPLE ore deposit is know for its gold bearing pyrite concentrate containing pyrrhotite and chalcopyrite is preaerated in a high lime solution ahead of cyanidation. Optimum results as regards gold extraction and cyanide consumption are

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Advances in the Cyanidation of Gold - ScienceDirect

2016-1-1  Figure 26.7 illustrates the benefits of using a high oxygen content in cyanidation of a gold ore with low pyrite and pyrrhotite content (Deschênes et al., 1999). A 16 ppm oxygen concentration in leaching can result in a faster dissolution rate than a 147% increase in the cyanide concentration. The use of oxygen has resulted in a 30% reduction ...

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The effects of dissolved oxygen and cyanide dosage

The results of cyanidation of a pre-oxidized pyrrhotite-rich gold ore in laboratory leaching experiments and in plant trials are presented to highlight the effects of particle size, oxygen and cyanide concentrations during pre-oxidation and cyanidation on the overall gold extraction. The Multi Mix Systems (MMS) unit for oxygen injection significantly enhances the mass transfer of reagents and ...

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Reactions of gold and sulfide minerals in cyanide

2002-11-1  The effect of pyrite, pyrrhotite, chalcopyrite, realgar and arsenopyrite on gold dissolution in cyanide media was investigated. The cyanidation of synthetic gold ores in the presence of various concentrations of sulfides was studied under constant experimental conditions. A mineralogical analysis of the minerals was performed. The leaching kinetics were determined.

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Cyanidation of gold clay ore containing arsenic and ...

2010-4-1  The extraction process of gold and silver from the gold clay ore containing arsenic and manganese was investigated. With the conventional technique, the leaching rates of gold and silver are 78.23% and 49.02%, respectively. To eliminate the negative effects of arsenic and manganese on cyanidation and increase the gold and silver leaching rates, a novel catalyst was added.

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Cyanidation of a copper-gold ore - ScienceDirect

1997-8-1  Effect of lead nitrate on gold leaching of a copper-gold ore. Pre-leaching: 30 min; cyanidation: pH 10.5, NaCN 710 mg/L, 02 15 ppm, 48 h. Pb (NO3)2 to 97.8% with 300 g/t Pb (NO3)2 (tests 4 to 6). The gold recovery remains the same for Pb (NO3)2 concentrations greater than 300 g/t (test 7).

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Cyanide Leaching and Decomposition of Pyrrhotite

2015-10-14  An EXAMPLE ore deposit is know for its gold bearing pyrite concentrate containing pyrrhotite and chalcopyrite is preaerated in a high lime solution ahead of cyanidation. Optimum results as regards gold extraction and cyanide consumption are

More

Reactions of gold and sulfide minerals in cyanide

2002-11-1  The effect of pyrite, pyrrhotite, chalcopyrite, realgar and arsenopyrite on gold dissolution in cyanide media was investigated. The cyanidation of synthetic gold ores in the presence of various concentrations of sulfides was studied under constant experimental conditions. A mineralogical analysis of the minerals was performed. The leaching kinetics were determined.

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Cyanidation of gold ores containing copper, silver,

Abstract Cyanidation tests on two ore samples from two different gold deposits are reported. The first sample contained 10.5 ppm gold with high arsenic and antimony. The second sample had a low gold content (2.5 ppm) but a high silver content (160 ppm). The first series of test work focused on the determination of conditions for extracting gold from the samples ground to − 75 μm.

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Cyanidation of gold clay ore containing arsenic and ...

2010-4-1  The extraction process of gold and silver from the gold clay ore containing arsenic and manganese was investigated. With the conventional technique, the leaching rates of gold and silver are 78.23% and 49.02%, respectively. To eliminate the negative effects of arsenic and manganese on cyanidation and increase the gold and silver leaching rates, a novel catalyst was added.

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Control of lead nitrate addition in gold recovery - Her ...

Deschênes “Cyanidation of a Pyrrhotite-Bearing Gold Ore from Musselwhite Mine”; Ann. Mtg. Cdn. Min. Proc., Canada, Jan., 2002, 735-755. Primary Examiner: BOS, STEVEN J . Attorney, Agent or Firm: Aventum IP Law LLP (Kanata, ON, CA) Claims: What is claimed is: 1. A method for improving the efficiency of a gold cyanidation leach process by ...

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passing rate bi gold ore grinding pdf

Cyanidation of a pyrrhotite bearing gold ore, Legal notice ofget price. passing of samples during grinding in mineral processing. Passing Rate Bi Gold Ore Grinding Pdf. passing of samples during grinding in mineral processing crushing and grinding techniues of some minerals pdf Crushing and grinding for grinding the ore sample to an 80% passing ...

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Characterization of refractory behaviour of complex gold ...

2009-6-10  1.3% to 2.4% of the gold was leachable with direct cyanidation and approximately 95% of Au in ore was extracted by means of selective destruction of gold-bearing minerals with nitric and sulphuric acids. TEAGUE et al[22] studied diagnostic leaching of a refractory gold ore containing 5.9% pyrrhotite

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4 Reasons and Solutions of Poor Gold Leaching Effect

2020-6-22  Reason#1: There are a lot of pyrite, pyrrhotite and marcasite in gold ore. These minerals are associated minerals that consume oxygen, alkali and cyanide. In the cyanidation process, they are easily oxidized and decomposed to produce sulfuric acid, ferrous sulfate, ferric subsulfate, ferric thiosulfate, etc. The decomposed substance reacts with ...

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INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING

2013-11-22  different lead nitrate additions were applied. Ovacik cyanidation plant leaching time, 24 hours for the constant 100 Mg/h ore feed rate was applied as optimal for all lead nitrate tests. Results showed the increase in gold and silver recoveries between 0.4-1.2% for gold

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17 - Flotation of Gold Ores

2017-2-16  copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. 17.2 GEOLOGY AND GENERAL MINERALOGY OF GOLD-BEARING ORES The geology of the deposit and the mineralogy of the ore play a decisive role in the selection of the best treatment method for a particular gold ore ...

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Cyanidation of gold ores c.pdf - Free Download PDF

2018-6-15  Silver and gold recoveries were 94.91% and 28.2% Gold ores respectively for the first sample and 92.5% and 93.5% for the second sample. Cyanidation In the second series of test work, H2O2 (0.015 M), air (0.15 L/min) and a mixture of H2O2 and air were used Reaction kinetics as oxidizing agents to improve the gold extraction kinetics of the ...

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Flowsheet for Processing Of Pyrite Gold Ores

Cyanidation of a pyrrhotite bearing gold ore. The european journal of mineral processing and environmental protection vol, no, , , pp cyanidation of a pyrrhotitebearing gold ore g desch nes, d hall and m fulton mining and mineral sciences laboratories, canmet, natural resources canada, booth street, ottawa, ontario, ka g canada.

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Passivation of a Pyrrhotite-Rich Flotation Concentrate

2017-1-1  The ore, containing gold disseminated in sulfide minerals and free fine gold in silicate gangue, is crushed in a two-stage crusher plant before being ground in a single 9,000 kW ball mill. The ball mill is in closed circuit, with about 25% of the cyclone underflow passing through a gravity plant with two, 48” Knelson concentrators.

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passing rate bi gold ore grinding pdf

Cyanidation of a pyrrhotite bearing gold ore, Legal notice ofget price. passing of samples during grinding in mineral processing. Passing Rate Bi Gold Ore Grinding Pdf. passing of samples during grinding in mineral processing crushing and grinding techniues of some minerals pdf Crushing and grinding for grinding the ore sample to an 80% passing ...

More

Cyanide Gold Extraction Process - JXSC Machine

2018-12-20  Cyanide gold extraction process, the process of extracting gold with cyanide is called cyanidation gold extraction, which is the main method for extracting gold from ore or concentrate.. Basic Gold Cyanide Process Steps. The cyanidation gold extraction process includes cyanide leaching, washing and leaching of the leaching slurry, extraction of gold

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gold ore for flotation of an ore Prominer (Shanghai ...

Processing Gold Ore by Flotation - 911 Metallurgist ... Gold in non-refractory sulfide ores can be recovered by whole-ore cyanidation, or some combination of flotation and cyanidation. Acceptable extraction of. ... kerogen, pyrite, pyrrhotite, copper-gold ores and mixed . Get Price. Flotation of Gold Ores - ResearchGate.

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The effect of mineralogical structure on the

An Evaluation of Pretreatments to Increase Gold Recovery from a Refractory Ore Containing Arsenopyrite and Pyrrhotite, Minerals Engineering, 13,1,1-18. Liipo, J., 2003. Characterization of the Mode of Occurrence of Gold in Jokisivu Pilot Feed and Products, Minerals Engineering, 16,1317-1321.

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Evaluation of Refractory Behaviour of Kaletaş (Turkey ...

2009-9-17  of gold bearing pynte/arsenopynte and pyrrhotite ... Kaletaş gold ore offers an estimated resource of ... ultrafinely ground ore to determine the gold available to cyanidation are presented in Table 6. Figure 4. Experimental set-up for cyanide and diagnostic leaching of the ore.

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INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING

2013-11-22  different lead nitrate additions were applied. Ovacik cyanidation plant leaching time, 24 hours for the constant 100 Mg/h ore feed rate was applied as optimal for all lead nitrate tests. Results showed the increase in gold and silver recoveries between 0.4-1.2% for gold

More

17 - Flotation of Gold Ores

2017-2-16  copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. 17.2 GEOLOGY AND GENERAL MINERALOGY OF GOLD-BEARING ORES The geology of the deposit and the mineralogy of the ore play a decisive role in the selection of the best treatment method for a particular gold ore ...

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cyanidation plant for quartz - jackysbnb.co.za

Cyanidation of a pyrrhotite-bearing gold ore. Cyanidation of a pyrrhotite-bearing gold ore ... The laboratory results were found to be similar to current plant ... represent 62% and quartz and tremolite (Ca 2. Inquire Now; Cyanidation of a pyrrhotite-bearing gold ore (PDF . Quartz and Tremolite: 30.2 ... cyanidation of a pyrrhotite-bearing gold ...

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cyanidation auriferous minerals

Cyanidation of a pyrrhotite-bearing gold ore. 353 The European Journal of Mineral Processing and Environmental Protection Vol.3, No.3, 1303-0868, 2003, pp. 353-361 Cyanidation of a pyrrhotite-bearing gold ore. Inquire Now; EP0177295A2 Recovery of gold from refractory auriferous ...

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Flowsheet for Processing Of Pyrite Gold Ores

Cyanidation of a pyrrhotite bearing gold ore. The european journal of mineral processing and environmental protection vol, no, , , pp cyanidation of a pyrrhotitebearing gold ore g desch nes, d hall and m fulton mining and mineral sciences laboratories, canmet, natural resources canada, booth street, ottawa, ontario, ka g canada.

More

Cyanidation of gold ores c.pdf - Free Download PDF

2018-6-15  Silver and gold recoveries were 94.91% and 28.2% Gold ores respectively for the first sample and 92.5% and 93.5% for the second sample. Cyanidation In the second series of test work, H2O2 (0.015 M), air (0.15 L/min) and a mixture of H2O2 and air were used Reaction kinetics as oxidizing agents to improve the gold extraction kinetics of the ...

More

Passivation of a Pyrrhotite-Rich Flotation Concentrate

2017-1-1  The ore, containing gold disseminated in sulfide minerals and free fine gold in silicate gangue, is crushed in a two-stage crusher plant before being ground in a single 9,000 kW ball mill. The ball mill is in closed circuit, with about 25% of the cyclone underflow passing through a gravity plant with two, 48” Knelson concentrators.

More

The effect of mineralogical structure on the

An Evaluation of Pretreatments to Increase Gold Recovery from a Refractory Ore Containing Arsenopyrite and Pyrrhotite, Minerals Engineering, 13,1,1-18. Liipo, J., 2003. Characterization of the Mode of Occurrence of Gold in Jokisivu Pilot Feed and Products, Minerals Engineering, 16,1317-1321.

More

ALTA Gold 2012 E-Doc - Albion Process

2017-12-21  Direct cyanidation of Ore A yielded poor gold extractions in the mid twenty percentile for ore ground to a P 80 of 53 micrometres. Some test work investigated cyanidation of tails but the grade of the gold in the tails was significantly low to be of value (0.2 g/t). Average cyanide consumption was 2 kg/t.

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INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING

2013-11-22  different lead nitrate additions were applied. Ovacik cyanidation plant leaching time, 24 hours for the constant 100 Mg/h ore feed rate was applied as optimal for all lead nitrate tests. Results showed the increase in gold and silver recoveries between 0.4-1.2% for gold

More

17 - Flotation of Gold Ores

2017-2-16  copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. 17.2 GEOLOGY AND GENERAL MINERALOGY OF GOLD-BEARING ORES The geology of the deposit and the mineralogy of the ore play a decisive role in the selection of the best treatment method for a particular gold ore ...

More

GOLD MINERALISATION MODELS AND THEIR USE lN THE

2015-8-10  Ore minerais as hosts for gold: - Although minor in relation to t11e rock-forming minerais, ore minerais tend to host a suhstantial amount of gold in many gold deposits. Ore minerais U1at commonly host gold are pyrite, pyrrhotite, arsenopyrite, chalcopyrite, galena, sphalerite and sulfosalts. Pyrite, arsenopyrtie, pyrrhotite

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