hypochlorite leaching of gold ore 6821

hypochlorite leaching of gold ore 6821

Hypochlorite Leaching of Gold

2016-8-3 · HYPOCHLORITE LEACHING OF GOLD ORE 7 1 Free Milling Gold Ore The free milling gold ore used in this study contains sulphide minerals, such as chalcopyrite and pyrite. Conventional cyanidation resulted in 95 % of the gold being extracted under strong leaching conditions, i.e., a grind of 90 % minus 200 mesh, leach with 1 g5 NaCN at pH 11.0 for

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Hypochlorite Leaching of Gold Ore

2017-11-8 · Leaching pure gold with an acidic sodium hypochlorite solution has been demonstrated to be effective. The initial rate of gold dissolution was extremely rapid. In a leaching solution containing 1 g/L NaCl, 1 % HCl and 2 % NaOCl, nearly 90 % of the gold was extracted in only 30 minutes.

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Leaching of an oxide gold ore with chloride/hypochlorite ...

2007-6-1 · An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl − concentration, and HCl concentration on gold leaching performance were investigated. Due to formation of CaOCl + complex in solution and hence less reactivity, calcium hypochlorite produces a

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Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and

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Optimization Process of the Refractory Gold Ore Extraction ...

2021-1-8 · Hypochlorite leaching system is a strong oxidizing solution for metal sulfides, which are naturally associated with gold extraction. This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a statistical approach in determining the optimum condition of gold extraction from

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(PDF) Chloride-hypochlorite oxidation and leaching of ...

In this paper, gold leaching of a refractory sulfide concentrate by chloride–hypochlorite solution was investigated and effects of stirring speed,

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING

2012-10-4 · Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and 25 C (the chlorine species regions are also marked) (Marsden and House, 2005) Fig. 2.

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Flexicone technology for sulfide ores | flexicone

Chloride-hypochlorite technology for leaching gold from ores and concentrates. We have developed a chloride-hypochlorite technology for leaching gold in an alkaline medium with a pH of 8-8.5. This technology allows the system to operate under less corrosive conditions with lower chloride concentration and can be used as an alternative to cyanide.

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Leaching of gold-containing ores with application of ...

2019-9-18 · possibility of gold-bearing ore using laboratory equipment, i.e. Knelson KS-MD 3 centrifugal concentrator. We obtained a gold-containing concentrate with 6.04 g/t gold content on a centrifugal concentrator with extraction of 52.65%, and 0.82 g/t gold in gravity tailings under the one-stage recovery flow sheet. We determined the

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次氯酸钠浸金电化学及难浸金矿浸出实验研究 - j ...

2017-12-29 · Electrochemical Profile of Leaching Gold with Sodium Hypochlorite and Experiment on Leaching A Refractory Gold Ore CHEN Liang 1, 2, TANG Daowen 1, 2 *, GUAN Guichao 1, GAO Peng 1, YAN Pu 1, LIU Xianchao 1 (1. College of Materials and Metallurgy2.

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Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and

Read More
Use of chloride–hypochlorite leachants to recover gold ...

This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING

2012-10-4 · Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and 25 C (the chlorine species regions are also marked) (Marsden and House, 2005) Fig. 2.

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Flexicone technology for sulfide ores | flexicone

Chloride-hypochlorite technology for leaching gold from ores and concentrates. We have developed a chloride-hypochlorite technology for leaching gold in an alkaline medium with a pH of 8-8.5. This technology allows the system to operate under less corrosive conditions with lower chloride concentration and can be used as an alternative to cyanide.

Read More
sodium thiosulphate And hypochloride leaching | Gold ...

2016-10-27 · Hi all. i am new to the forum, and dont seem to find any info on thipsulphate leaching / hypochloride leaching of a sulphide gold ore. could someone point me in the correct direction! i need to choose one of 2methods above based on its simplicitu.

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GOLD EXTRACTION

2019-8-9 · The process uses sodium hypochlorite with a. ... Goldstrike, gold-bearing, sulphur-based ore is . heated as a thick slurry of ore, air, water and limestone in large pressure chambers or autoclaves and then pumped into the ‘resin-in- ...

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Effect of Pretreatment of Sulfide Refractory Concentrate ...

2013-12-24 · ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold recovery by direct cyanide leaching, after fine grinding of mineral indicates a refractory mineral [1]. The refrac- tory ore must be destroyed or attacked by chemical means with the use of oxidative processes, such as oxida-

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金矿非氰化浸金研究进展 - USTB

2020-11-15 · Baghalha M. Leaching of an oxide gold ore with chloride/hypochlorite solutions. Int J Miner Process, 2007, 82(4): 178 doi: 10.1016/j.minpro.2006.09.001 [48] Nam K S, Jung B H, An J W, et al. Use of chloride-hypochlorite leachants to recover gold from tailing.

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次氯酸钠浸金电化学及难浸金矿浸出实验研究 - j ...

2017-12-29 · Electrochemical Profile of Leaching Gold with Sodium Hypochlorite and Experiment on Leaching A Refractory Gold Ore CHEN Liang 1, 2, TANG Daowen 1, 2 *, GUAN Guichao 1, GAO Peng 1, YAN Pu 1, LIU Xianchao 1 (1. College of Materials and Metallurgy2.

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Process for the recovery of gold from carbonaceous ores ...

Referring to FIG. 1, carbonaceous ore 1 is fed to crushing operation 2 where it is crushed, for example, by a cone crusher. Carbonaceous ore 1 is a gold-bearing ore, normally containing anywhere from 0.05 to 1.0 ounce of gold per ton and from

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Flexicone technology for sulfide ores | flexicone

Chloride-hypochlorite technology for leaching gold from ores and concentrates. We have developed a chloride-hypochlorite technology for leaching gold in an alkaline medium with a pH of 8-8.5. This technology allows the system to operate under less corrosive conditions with lower chloride concentration and can be used as an alternative to cyanide.

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Physikochemical Bases of ”Green” Technology of Gold

Keywords: leaching of gold, organic acids, ore dressing, sodium hypochlorite I. Introduction In this paper, we report on the results of our 11-year research (2009 - 2021) devoted to the development of an integrated waste-free (low-waste) technology for processing minerals containing non

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Leaching of Silver and Gold Contained in a Sedimentary

Some sedimentary minerals have attractive contents of gold and silver, like a sedimentary exhalative ore available in the eastern of Hidalgo in Mexico. The gold and silver contained represent an interesting opportunity for processing by non-toxic and aggressive leaching reagents like thiosulfate. The preliminary kinetic study indicated that the leaching process was poorly

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Effect of Pretreatment of Sulfide Refractory Concentrate ...

2013-12-24 · ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold recovery by direct cyanide leaching, after fine grinding of mineral indicates a refractory mineral [1]. The refrac- tory ore must be destroyed or attacked by chemical means with the use of oxidative processes, such as oxida-

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中南大学学报/自然科学版/英文版-官方网站-免费论文下载-作

2010-11-11 · Key words refractory gold concentate; sodium hypochlorite; one-step leaching of gold With large-scale exploitation of the easy-to- separate and extract gold ore, the resources are be- coming exhausted, which presses people to exploit and utilize refractory gold ore. FeAsS and FeS2 are major sulfide mineral of gold carrier, in which gold

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GOLD EXTRACTION

2019-8-9 · The process uses sodium hypochlorite with a. ... Goldstrike, gold-bearing, sulphur-based ore is . heated as a thick slurry of ore, air, water and limestone in large pressure chambers or autoclaves and then pumped into the ‘resin-in- ...

Read More
sodium thiosulphate And hypochloride leaching | Gold ...

2016-10-27 · Hi all. i am new to the forum, and dont seem to find any info on thipsulphate leaching / hypochloride leaching of a sulphide gold ore. could someone point me in the correct direction! i need to choose one of 2methods above based on its simplicitu.

Read More
Extraction and Recovery of Gold from both Primary and ...

2020-5-9 · Gold extraction processes from both primary and secondary sources have changed little over the past centuries with cyanide remaining the preferred leach reagent used in 90% of gold mines, while aqua regia, which has been used for more than 1000 years, remains an unmatched gold leaching reagent for secondary sources.

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DETOXIFICATION OF EFFLUENTS WITH CYANIDE.

2021-11-16 · conditions will be used in the cyanidation process applied over a Gossan ore during its gold and silver recovery. Gossan ore of Rio Tinto (Huelva, Spain) is used for the application of the detoxification of effluents with cyanide and using the techniques of characterization to determining the main elements: iron (25.0%) and silicium (21.2% ...

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Extraction of Gold

With pyritic ores a preliminary roasting to eliminate sulphur is necessary. The ore is reduced to a fine state of division and amalgamated simultaneously in a stamp-mill, the solid gold-amalgam separated from the liquid mercury by filtration through

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