(PDF) Cyanidation of a pyrrhotite-bearing gold ore
Cyanidation of a pyrrhotite-bearing gold ore January 2003 Authors: G. Deschênes BBA Inc D Hall M Fulton Abstract and Figures 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 Cyanidation of a pyrrhotite-bearing gold ore Semantic
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Advances in the Cyanidation of Gold ScienceDirect
The Musselwhite Mine treats a pyrrhotite-bearing ore containing mostly free gold (5.5–5.8 g/t Au, 4.2% pyrrhotite). The pyrrhotite is both monoclinic (50%) and In spite of the low consumption of cyanide observed in the laboratory experiments (i.e., 0.19kg/t vs. 0.35kg/t in the plant), the laboratory study indicated a Cyanidation of a pyrrhotite-bearing gold ore 911
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Susceptibility to cyanidation of pyrrhotite-associated gold in
A study of the cyanidation susceptibility of gold to pyrrhotite in calcines from pyrite roasting was carried out in two phases. In the first phase, pyrite was treated It was shown that copper and nickel form complexes with cyanide ions that suppress both gold leaching and gold sorption on the activated carbon [41,42]. Pyrrhotite may react with cyanide...Effect of oxygen on gold leaching of a pyrrhotite
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The effects of dissolved oxygen and cyanide dosage on gold
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 The cyanidation of a pyrrhotite-bearing gold ore indicated that direct cyanidation could not effectively leach the gold (Deschenes and Fulton, 2002). Pyrite Reactions of gold and sulfide minerals in cyanide media
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Gold recovery from a refractory pyrrhotite ore by biooxidation
The aim of the present investigation was to study the biooxidation of a refractory gold-bearing pyrrhotite, in order to increase the gold recovery during the The maximum gold content in ore is reflected in the chemical composition and structural parameters of stoichiometric pyrrhotite and namely in these pyrrhotite of (PDF) Pyrrhotite of Gold-Bearing Ores: Composition, Point
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Cyanidation of a pyrrhotite-bearing gold ore 911
water was used to pulp the ore. The gold-leaching cell is made of glass, with a capacity of two litres. The tests were performed on a pulp of 50% weight (1000g of ore with 1000ml of solution). Most of the cyanidation tests were carried out with a grind size at 73.9% -74µm and 100% passing 149µm. Table 1 Analysis of the pyrrhotite-gold oreThe Musselwhite Mine treats a pyrrhotite-bearing ore containing mostly free gold (5.5–5.8 g/t Au, 4.2% pyrrhotite). The pyrrhotite is both monoclinic (50%) and hexagonal (50%). Cyanidation with the addition of lead nitrate was already part of the plant strategy at the beginning of the project.Advances in the cyanidation of gold ScienceDirect
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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 wasThe effect of bio-oxidation and neutral atmospheric oxidation pre-treatment of refractory gold concentrates on gold and silver extraction during cyanidation was investigated. A series of pre-treatment experiments was conducted on three high sulfur (> 9%) refractory concentrates with 0.92–1.25 g/t gold and 64–90 g/t silver. Cyanidation of Gold Extraction from Refractory Sulfide Gold Concentrates: A
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Cyanidation of a pyrrhotite-bearing gold ore
water was used to pulp the ore. The gold-leaching cell is made of glass, with a capacity of two litres. The tests were performed on a pulp of 50% weight (1000g of ore with 1000ml of solution). Most of the cyanidation tests were carried out with a grind size at 73.9% -74µm and 100% passing 149µm. Table 1 Analysis of the pyrrhotite-gold oreThe cyanidation of a pyrrhotite-bearing gold ore indicated that direct cyanidation could not effectively leach the gold (Deschenes and Fulton, 2002). Pyrite showed a preg-robbing effect as well (Rees and van Denventor, 2000). A careful selection of the leaching parameters is critical toReactions of gold and sulfide minerals in cyanide media
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Cyanidation of gold ores containing copper, silver, lead, arsenic
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 The cyanide heap leaching behavior of cupriferous gold ores. M. S. Tahvili. Materials Science. 2002. To develop a fundamental understanding of cyanide heap leaching of low-grade gold ores, with significant copper mineralization, two sets of column leach tests were operated under two different. Expand.Cyanidation of a copper-gold ore Semantic Scholar
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Roasting and chlorine leaching of gold-bearing refractory
A refractory ore, generally, contains sulfide minerals, organic carbon, or both. Sulfide minerals (pyrite, pyrrhotite, or arsenopyrite) often trap or occlude gold and other precious metal particles [4]. Organic carbon present in gold ore may adsorb dissolved gold cyanide complexes in much the same way as activated carbon (AC).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; Cyanidation of a pyrrhotite-bearing gold ore MOAM.INFO
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The effects of dissolved oxygen and cyanide dosage on gold
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. gold-bearing sludge with arsenic and antimony, wasCyanidation of a pyrrhotite-bearing gold ore. January 2003. G. Deschênes; D Hall; M. Fulton; The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotiteAdvances in the Cyanidation of Gold Request PDF
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Characterization of refractory behaviour of complex gold/silver ore
Refractory gold-bearing ore: A review of treatment methods and recent advances in biotechnological techniques [J] Hydrometallurgy (1994) RE BROWNER et al. Effect of pyrrhotite reactivity on cyanidation of pyrrhotite produced by pyrolysis of a sulphide ore [J] Minerals Engineering (1998) JG DUNN et al.The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or silver from these sources, which are named refractory and are typically low-grade, can be complicated due to one or more of the following effects: (1) kinetic or thermodynamic impediments on The recovery of gold from refractory arsenopyrite
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Cyanidation of a copper-gold ore ScienceDirect
In the previous work, there was a 4-h pre-leaching for an ore containing 12% pyrite, 1.4% pyrrhotite and 0.14% chalcopyrite. In the present test work, the pre-leaching is only 0.5 h and the material has a copper content 3 times higher than the previous ore. Effect of oxygen and lead nitrate on the cyanidation of a sulphide-bearing gold oreThe gold content of the ore sample, coming from Bolivia, was of 10 g t −1 Au. After 24 h leaching time by direct cyanidation, low gold recovery was obtained (<20% Au), with a high reagent consumption. On the other hand, a high gold recovery was achieved for the biooxidated samples: after 24 h cyanidation gold dissolution reached about 91% Au.Preparatory bioleaching to the conventional cyanidation of
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The recovery of gold from refractory arsenopyrite concentrates
A gold bearing arsenopyrite concentrate was characterised, and found to consist of 70% arsenopyrite and 25% pyrite with a small amount of stibnite and silicate minerals. as both minerals decompose to pyffbotite the invisib',Ie gold is exsolved from the pyrrhotite as fane particles the product is porous due to the loss of sulfur and/orFigure 7. Effect of oxygen on gold leaching of a pyrrhotite-bearing gold ore (Cyanidation: pH 11.2, 200g/t Pb(NO3)2, 32h) At the laboratory scale, it is impossible to figure out the economics of using oxygen vs. the additional in gold extracted because of the tremendous scale factor and the lack of accuracy in the oxygen consumed.Cyanidation of A Pyrrhotite-Bearing Gold Ore: January 2003
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Cyanidation of gold ores containing copper, silver, lead, arsenic
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 2. The Extraction Processes of Gold-Pyrite Ore. The treatment principle of gold-pyrite ore is to separate the sulfide from the gangue and dissolve the gold in the cyanide solution. In order to remove antimony, arsenic, carbon and other substances that absorb fluoride, roasting treatment is required before cyanidation.4 Extraction Processes for Gold-Pyrite Ore Mining-pedia
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