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cyanidation of a pyrrhotite bearing gold ore

(PDF) Cyanidation of a pyrrhotite-bearing gold ore

Effect of lead nitrate addition on the leaching of a pyrrhotite-bearing gold ore (Cyanidation: pH 11.2, 380ppm NaCN, 8ppm O 2 , 32h) Figure 5 illustrates the reaction of cyanide with chalcopyrite ...

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Cyanidation of a pyrrhotite-bearing gold ore

Cyanidation of a pyrrhotite-bearing gold ore G. Deschênes1*, D. Hall2 and M. Fulton1 1 Mining and Mineral Sciences Laboratories, CANMET, Natural Resources Canada, 555 Booth Street, Ottawa, Ontario, K1A 0G1 Canada 2 Placer Dome Canada, Musselwhite Mine, P.O. Box 7500,Thunder Bay, Ontario, P7B 6S8 Canada Received 30 July 2002; accepted 21 November 2003 ABSTRACT The Musselwhite Mine

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

Cyanidation of a pyrrhotite-bearing gold ore @inproceedings{Deschnes2004CyanidationOA, title={Cyanidation of a pyrrhotite-bearing gold ore}, author={G. Desch{\^e}nes and D. Hall and M. Fulton}, year={2004} } G. Deschênes, D. Hall, M. Fulton; Published 2004; The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory

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Figure 5 from 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 (1).pdf - See ...

Cyanidation_of_a_pyrrhotite-bearing_gold_ore (1).pdf - See discussions stats and author profiles for this publication at

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Cyanide Leaching and Decomposition of Pyrrhotite

17/03/2017  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 obtained when using well aerated cyanide solutions containing at least 0.05% CaO and saturated with calcium sulphate. Laboratory results

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cyanidation of a pyrrhotite bearing gold ore

cyanidation of a pyrrhotite bearing gold ore; recovering gold from ore in pakistan; rock crusher equipment p in india; rock crushing machine roller mill portable crusher; portable aggregate rock crusher machinery stone crusher; used jaw crusher france; Gold Ore Mill Trunnion Bearing Cooling; the extraction process of gold from gold bearing ore ; Gold Bearing Rocks Crusher In Africa; leaching ...

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Gold Agitation Cyanidation Leaching

For general non-sulfide gold-bearing ores, it is usually grind to 60-70%-200 mesh. Cyanide is added to the grinding operation, and side immersion is performed to improve the leaching efficiency. For sulfide gold-bearing ores, flotation enrichment is often used. Or separating out some gold-bearing sulfide concentrates from flotation concentrates, such as gold-bearing copper concentrates, and ...

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Cyanide Leaching and Decomposition of Pyrrhotite

17/03/2017  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 obtained when using well aerated cyanide solutions containing at least 0.05% CaO and saturated with calcium sulphate. Laboratory results

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Effect of oxygen and lead nitrate on the cyanidation of a ...

Various leaching parameters such as particle size, cyanide concentration, pH and the application of oxygen and lead nitrate have been investigated for the recovery of gold from an ore containing pyrite and small amounts of pyrrhotite and chalcopyrite. The application of lead nitrate in combination with oxygen generated the best results. Gold ...

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Reactions of gold and sulfide minerals in cyanide media ...

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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4 Reasons and Solutions of Poor Gold Leaching Effect

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 cyanide or alkali, so that a large amount of ...

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Cyanidation of Gold-Bearing Ores Taylor Francis Group

The gold cyanidation process for its extraction from ore bodies involves heterogeneous reactions at the interfaces of solid and liquid. The rate of gold leaching in cyanide solution increases linearly with respective increase in cyanide concentration until attaining the maximum point. Particle size is a vital factor that affects gold cyanidation. A gold bearing ore requires fine grinding to ...

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cyanidation of a pyrrhotite bearing gold ore

cyanidation of a pyrrhotite bearing gold ore; recovering gold from ore in pakistan; rock crusher equipment p in india; rock crushing machine roller mill portable crusher; portable aggregate rock crusher machinery stone crusher; used jaw crusher france; Gold Ore Mill Trunnion Bearing Cooling; the extraction process of gold from gold bearing ore ; Gold Bearing Rocks Crusher In Africa; leaching ...

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Gold Agitation Cyanidation Leaching

For general non-sulfide gold-bearing ores, it is usually grind to 60-70%-200 mesh. Cyanide is added to the grinding operation, and side immersion is performed to improve the leaching efficiency. For sulfide gold-bearing ores, flotation enrichment is often used. Or separating out some gold-bearing sulfide concentrates from flotation concentrates, such as gold-bearing copper concentrates, and ...

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Gold cyanidation - Wikipedia

Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex.It is the most commonly used leaching process for gold extraction.. Production of reagents for mineral processing to recover gold, copper, zinc and silver represents ...

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2. Cyanidation of refractory Au ores (2014).pdf - See ...

Cyanidation of refractory Au ores (2014).pdf - See discussions stats and author profiles for this publication at Cyanidation of refractory Au ores (2014).pdf - See... School Universidad TecMilenio

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cyanidation of gold process technical report - MC World

08/04/2014  Cyanidation Of Gold Process Cip Technical Report. a gold cyanidation facility cost. Gold Extraction Gold Cyanide Gold Manufacturing Process . Taking the gold cyanidation plant with processing capacity of 100000 tons and gold grade of 75 g/t as an example gold CIL process can save the investment cost of $486000 than the CIP process reduce the capital backlog of $201700 save and

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Reactions of gold and sulfide minerals in cyanide media ...

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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4 Reasons and Solutions of Poor Gold Leaching Effect

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 cyanide or alkali, so that a large amount of ...

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Cyanidation of Gold-Bearing Ores Taylor Francis Group

The gold cyanidation process for its extraction from ore bodies involves heterogeneous reactions at the interfaces of solid and liquid. The rate of gold leaching in cyanide solution increases linearly with respective increase in cyanide concentration until attaining the maximum point. Particle size is a vital factor that affects gold cyanidation. A gold bearing ore requires fine grinding to ...

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(PDF) The Use of Oxygen in Gold Cyanidation Wesley ...

Knowing the oxygen demand of a gold ore, the operation of preoxidation followed by cyanidation, or straight cyanidation of the ore slurry enriched with dissolved oxygen can be optimized in relation to higher gold recovery. shorter retention time, low cyanide consumption and reduced environmental concerns pertaining to cyanide and/or ammonia in the effluents. This task is carried out with a ...

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cyanidation of a pyrrhotite bearing gold ore

cyanidation of a pyrrhotite bearing gold ore; recovering gold from ore in pakistan; rock crusher equipment p in india; rock crushing machine roller mill portable crusher; portable aggregate rock crusher machinery stone crusher; used jaw crusher france; Gold Ore Mill Trunnion Bearing Cooling; the extraction process of gold from gold bearing ore ; Gold Bearing Rocks Crusher In Africa; leaching ...

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Gold cyanidation - Wikipedia

Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex.It is the most commonly used leaching process for gold extraction.. Production of reagents for mineral processing to recover gold, copper, zinc and silver represents ...

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Gold with Pyrite, Pyrrhotite, Marcasite and Arsenopyrite ...

17/04/2016  In this ore classification, the gold occurs both in the free state and disseminated in the sulfides. (Pyrite is found to some degree in most of the world's gold deposits. ) Sulfides tend to decompose in cyanide solutions. Pyrite is the most stable but when pyrrhotite is present trouble is usually experienced both in regard to cyanide consumption and gold extraction. Pyritic flotation ...

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What Is the Difference between Gold Flotation and

It is mainly applicable to the gold-bearing quartz vein ore with fine gold particles and high floatability, multi-metal gold-bearing sulfide ore and carbon-bearing ore. The cyanidation is applicable to process flotation gold concentrates or amalgamated heavy separation tailings. It is also process muddy oxidized gold ores. 2. Process Flow and Recovery Rate. Flotation gold extraction process ...

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17 - Flotation of Gold Ores

The flotation of gold-bearing ores is classified according to ore type (i.e. gold ore, gold ... PGMs (i.e. nickel, pyrrhotite, copper and pyrite). Therefore, the reagent scheme developed for PGMs also recovers gold. Normally, for the flotation of PGMs and associated gold, a combination of xanthate and dithiophosphate is used, along with gangue depressants guar gum, dextrin or modified ...

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2. Cyanidation of refractory Au ores (2014).pdf - See ...

Cyanidation of refractory Au ores (2014).pdf - See discussions stats and author profiles for this publication at Cyanidation of refractory Au ores (2014).pdf - See... School Universidad TecMilenio

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