hypochlorite leaching of gold ore

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

Jun 01, 2007  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 sluggish gold leaching kinetics,

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Sodium hypochlorite pretreatment for heap leaching gold ore

Laboratory leaching experiments were conducted to ascertain the effectiveness of sodium hypochlorite solution, NaOCl, as a pretreatment for oxidizing the carbonaceous matter and dissolving gold from finely disseminated gold ores. The ores tested were from the Jerritt Canyon ore body (oxide, carbonaceous) in Elko County, Nevada, USA and ...

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

The performance of chloride/hypochlorite solution for gold leaching also depends on major minerals pres-ent in the ore. Gold–chloride complex is rather unstable and may re-precipitate upon contact with a reductant, such as sulfidic materials of ore. Puvvada and Murthy (2000) used chloride/hypochlorite solution to leach gold

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Hypochlorite Leaching of Gold

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

The performance of chloride/hypochlorite solution for gold leaching also depends on major minerals pres-ent in the ore. Gold–chloride complex is rather unstable and may re-precipitate upon contact with a reductant, such as sulfidic materials of ore. Puvvada and Murthy (2000) used chloride/hypochlorite solution to leach gold

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Sodium hypochlorite pretreatment for heap leaching gold ore

Laboratory leaching experiments were conducted to ascertain the effectiveness of sodium hypochlorite solution, NaOCl, as a pretreatment for oxidizing the carbonaceous matter and dissolving gold from finely disseminated gold ores. The ores tested were from the Jerritt Canyon ore body (oxide, carbonaceous) in Elko County, Nevada, USA and ...

More

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 HCl concentration on gold leaching performance were investigated. Due to formation of CaOCl + complex in solution and hence less reactivity, calcium hypochlorite produces a sluggish gold leaching kinetics, taking twice ...

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

Abstract 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 sluggish gold leaching kinetics, taking ...

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

Leaching of an oxide gold ore with chloride/hypochlorite solutions. Download. Related Papers. A Comparative Study of Cyanide and Chloride – Hypochlorite Gold Leaching of Oxide Ore from Placer, Surigao Del Norte. By Renee Alexis Taladua. Application of Alternative Lixiviants for Secondary Heap Leaching of Gold.

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Hypochlorite pretreatment in heap leaching of a low grade ...

The concept of hypochlorite treatment prior to cyanidation in the heap leaching of low grade carbonaceous gold ores is discussed. Laboratory column leach tests using a low grade carbonaceous ore were performed to investigate the effects of pH, hypochlorite consumption and concentration, and bed height on total gold extraction. At high pH, hypochlorite stability increases and thus, hypochlorite ...

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

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 ...

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Hypochlorite Leaching Of Gold Ore

Hypochlorite Leaching of Gold Ore. 25 Apr 2018 . In a leach solution containing 20 HCl and 20 gL NaCl, 97 of the gold was extracted in 6 hours with 90 kgt available chlorine and 95 of. More Details Roasting and chlorine leaching of gold-bearing . Keywords Gold ores. Refractory ores. Leaching. Chlorine. a b s t r a c t.

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Hypochlorite Leaching Of Gold Ore

Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching. However previous studies showed hypochlorite consumption is high and gold extraction is proportional to hypochlorite consumption.

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Hypochlorite Leaching Of Gold Ore

Hypochlorite Leaching of Gold Ore. 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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hypochlorite leaching of gold ore Prominer (Shanghai ...

Leaching of an oxide gold ore with chloride/hypochlorite ... Nov 17, 2020 ... Hypochlorous acid reactions with sulfide and ferrous content of ore proceed very slowly in the pH range of 4–11.

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copper leaching with sodium hypochlorite

HYPOCHLORITE LEACHING OF GOLD ORE ... the sodium hypochlorite requirement A leach solution containing 1 @ NaC1,5 % ... Copper and Iron," Trans ... Inquire Now; Hypochlorite Leaching Of Gold Ore hansiegrietjie.co. ONE-STEP LEACHING OF SOME REFRACTORY GOLD CONCENTRATE CONTAINING ARSENIC AND THEORY ANALYSIS* Mao . sodium hypochlorite one-step ...

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Non-precipitated reagent - Gold Refining Forum

Nov 14, 2014  Like most that come too this forum seeking answers. I have a situation I need to address. Scanning the book recommended by the hosts; C M Hoke. I have arrived at the conclusion, that it doesn't apply to my particular problem. It is mostly based on jewelry substances and the PMG's not actual ore gold.

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Hypochlorite Leaching of Gold Ore Hydrochloric Acid ...

Gold 3 % HC1 and 10 g/L NaCl were added in a extraction was increased with increasing HYPOCHLORITE LEACHING OF GOLD ORE. hydrochloric acid concentration 82 % of the Extracting gold from an ore required gold was extracted with 3 % HCl.

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

Abstract 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 sluggish gold leaching kinetics, taking ...

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Chloride–hypochlorite leaching of gold from oxidized ores ...

Direct hypochlorite leaching resulted in gold recovery of 23.0 % in 4 hours and 72.7 % in 24 hours. After pre-oxidation and subsequent leaching with hypochlorite, the recovery was 80.2 % and 98.8 % in 4 and 24 hours, respectively. After ultrasonic treatment, the gold

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Hypochlorite Leaching Of Gold Ore

Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching. However previous studies showed hypochlorite consumption is high and gold extraction is proportional to hypochlorite consumption.

More

Hypochlorite Leaching Of Gold Ore

Hypochlorite Leaching of Gold Ore. 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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Hypochlorite Pretreatment of a Low Grade Carbonaceous Gold ...

Apr 06, 2007  Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching. However, previous studies showed hypochlorite consumption is high and gold extraction is proportional to hypochlorite consumption.

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A Comparative Study of Cyanide and Chloride – Hypochlorite ...

An oxide gold ore from Placer, Surigao Del Norte was subjected to chloride-hypochlorite and cyanide leaching at room temperature at 3 different hours – 4 hours, 12 hours and 24 hours. This project characterized the ore used and assessed the effects

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Chlorine leach of refractory gold ore - Gold Refining ...

Mar 02, 2021  I used 35% hydrochloric acid and 15% sodium hypochlorite acid on a roasted refractory gold ore directly. The ore was roasted at 650 degrees C for half an hour and cooled before it was submerge with acid mix. Kept it in for 4 hours and adding 15ml sodium hypochlorite every 20 minutes to keep oxidation at 1100mV. No heat added.

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Effect of Pretreatment of Sulfide Refractory Concentrate ...

rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory 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

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copper leaching with sodium hypochlorite

HYPOCHLORITE LEACHING OF GOLD ORE ... the sodium hypochlorite requirement A leach solution containing 1 @ NaC1,5 % ... Copper and Iron," Trans ... Inquire Now; Hypochlorite Leaching Of Gold Ore hansiegrietjie.co. ONE-STEP LEACHING OF SOME REFRACTORY GOLD CONCENTRATE CONTAINING ARSENIC AND THEORY ANALYSIS* Mao . sodium hypochlorite one-step ...

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Recovery of Platinum, Palladium, and Gold From Stillwater ...

peroxide, chlorine, sodium hypochlorite, nitric acid, and a persulfate salt were the oxidants investigated. The two-stage leaching scheme ex­ tracted up to 97 pct of the platinum, 92 pct of the palladium, and 99 pct of the gold from the roasted concentrate. The base

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leaching gold with sodium hypochlorite

Jul 10, 2019  leaching gold with sodium hypochlorite. carbonaceous gold ore treatment method15 apr 2018 . flotation; cyanide leaching with carbon or resin in pulp; roasting . was narrowed to either chlorine or sodium hypochlorite generated in situlorination leaching of refractory ores - hydrometallurgy .i am attempting to design a chlorine leach (sodium hypochlorite) as a starting . does this book by ...

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Gold Leaching Cyanide Sodium Hydroxide-GOLD ORE MINING

Leaching of an oxide gold ore with chloride/hypochlorite . At the low temperature of 10 176;C ultrasound-assisted extraction increased extraction rate of gold by 0.6%-0.8% and reduced the gold content of cyanide tailings to 0.28 g/t in the leaching of gold

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Optimization process of refractory gold ore extraction by ...

In such cases, it is necessary to perform oxidative pretreatment of the ore to oxidize the sulfide matrix, and gold particles can be exposed to the solution during the leaching process [1]. In recent years, hypochlorite and chloride solutions have been introduced as alternative materials for hydrometallurgical methods of gold extraction instead ...

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