effect of lead nitrate during cyanidation of gold ores

effect of lead nitrate during cyanidation of gold ores

Effect of lead nitrate on cyanidation of gold ores

Oct 01, 2000 Effect of lead nitrate on cyanidation of gold ores 1267 It is interesting to note that when the gold electrode treated with lead sulfide was put in 1 M NaCN solution without lead nitrate addition, and the same potential sweep used in Figure 3 was performed, four

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Effect of lead nitrate on cyanidation of gold ores

The effect of lead nitrate is subtler for chalcopyrite and pyrrhotite because it was less effective to retard the reaction of sulphides with cyanide and the reaction of iron with oxygen. For gold, the addition of lead nitrate has the same effect with pyrrhotite than with pyrite; inhibiting partially the

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Effect of oxygen and lead nitrate on the cyanidation of a

Aug 01, 1995 At high cyanide concentration, the rate of dissolution depends only on the oxygen concentration according to: (3) rate = 2 AD02 8-1 102 1 (4) Figure 3 illustrates the effect of oxygen and lead nitrate separately. The addition of 100 g/t lead nitrate yielded the best gold recovery (95.9%) and the lowest cyanide consumption (0.59 kg/t).

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(PDF) Effect of Lead Nitrate on Cyanidation of Antimonial

The effect of lead nitrate concentrations on cyanide consumption. CONCLUSIONS In this paper, the effect of lead nitrate on cyanidation of an antimonial refractory gold and silver ore was demonstrated. Results showed that lead nitrate addition had a limited effect on gold and silver extractions from antimonial refractory Akoluk ore.

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(PDF) Effect of Lead Nitrate on Cyanidation of Antimonial

The effect of lead nitrate concentrations on cyanide consumption. CONCLUSIONS In this paper, the effect of lead nitrate on cyanidation of an antimonial refractory gold and silver ore was demonstrated. Results showed that lead nitrate addition had a limited effect on gold and silver extractions from antimonial refractory Akoluk ore.

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INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF

hours leaching by the addition of lead nitrate as 0.1-0.5 kg/Mg. NaCN consumption decreased or did not change except for the Ovacik ore. In the case of the Ovacik ore it slightly increased. Keywords: lead nitrate, gold, silver, cyanide leaching Introduction Extraction of gold from its ores by cyanide leaching has been the preferred method for

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Effect of Oxidative Pretreatment and Lead Nitrate Addition

Nov 01, 2019 高达10%返现 Cyanidation is the main process in gold leaching. There are several parameters that affect gold recovery and cyanide consumption. In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were investigated. Au recovery was increased from 79.4% to

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Effect of Oxidative Pretreatment and Lead Nitrate Addition

Cyanidation is the main process in gold leaching. There are several parameters that affect gold recovery and cyanide consumption. In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were investigated. Au recovery was increased from 79.4% to 89.4% in the presence

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Effect of Lead Nitrate on Gold Leach Kinetics

Tests were run in which the effects of lead nitrate at pH 10 were investigated on the cyanidation of synthetic gold ores containing these minerals. The usual procedure was followed. The pregnant solutions were analysed for total sulphide sulphur, total sulphur, thiocyanate, and arsenic or antimony.

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Advances in the Cyanidation of Gold ScienceDirect

Jan 01, 2016 Effect of lead nitrate and oxygen addition on the leaching of a pyrrhotite-bearing gold ore with addition of lead nitrate (preleaching: pH 11.2, 0.5 h, 8 ppm O 2; cyanidation: pH 11.2, 380 mg/L NaCN, 8 ppm O 2. After Deschênes et al. (2002b).

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Cyanidation of a copper-gold ore ScienceDirect

Aug 01, 1997 Process. 50 (1997) 127-141 Effect of lead nitrate concentration 100 90 8O A 70 i 50 40 20 10 0 0 8 16 24 32 40 48 Time (h) Fig. 5. 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).

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the effect of sodium thiocyanate on gold cyanidation

Effect of lead nitrate on cyanidation of gold ores instead of forming thiocyanate, is adsorbed on metallic gold. Published in: Minerals Engineering · 2000Authors: G Deschenes · R Lastra · J R Brown · S Jin · O May · E GhaliAffiliation: Natural Resources Canada · Laval UniversityAbout: X-ray photoelectron spectroscopy · Iron

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TREATMENT OF A COPPER RICH GOLD ORE BY AMMONIA

The addition of lead nitrate did not affect the leaching of gold. When ammoniacal cyanide leaching system was used, the extraction of gold was significantly improved to >90%.

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Gold cyanidation

Lead nitrate can improve gold leaching speed and quantity recovered, particularly in processing partially oxidized ores. Effect of dissolved oxygen [ edit ] Oxygen is one of the reagents consumed during cyanidation, accepting the electrons from the gold, and a deficiency in

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Treatment of copper-rich gold ore by cyanide leaching

phases including copper sulphides present in the ore can also lead to the passivation of gold surface in addition to its consumption of cyanide and oxygen [1]. Pre-aeration of ore prior to cyanidation and/or addition of lead nitrate can be beneficial for mitigating problems associated with sulphide minerals during cyanidation of gold [13,14,16].

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Treatment of copper-rich gold ore by cyanide leaching

Feb 01, 2015 Trans. Nonferrous Met. Soc. China 25(2015) 597−607 Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching A. D. BAS, E. KOC, E. Y. YAZICI, H. DEVECI Hydromet-B&PM Group, Division of Mineral & Coal Processing, Department of Mining Engineering, Karadeniz Technical University, Trabzon 61080, Turkey Received 28 March

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refractory gold milling process flow

Refractory Gold Ore Treatment Methods 911 Metallurgist. 14/07/2016 The Albion Process described by Hourn et al. (2005). has been adopted at two refractor) gold projects (i.e.. Las Lagunas tailings reclaiming project, Dominican Republic, and European Goldfields, Romania). A further project incorporating the was commissioned in 2014 at the

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(PDF) Effect of Lead Nitrate on Cyanidation of Antimonial

The effect of lead nitrate concentrations on cyanide consumption. CONCLUSIONS In this paper, the effect of lead nitrate on cyanidation of an antimonial refractory gold and silver ore was demonstrated. Results showed that lead nitrate addition had a limited effect on gold and silver extractions from antimonial refractory Akoluk ore.

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EFFECT OF HYDROGEN PEROXIDE AND LEAD NITRATE IN

EFFECT OF HYDROGEN PEROXIDE AND LEAD NITRATE IN THE CYANIDATION LEACHING OF GOLD ORE SAMPLE . by . ONG PEK LING . Thesis submitted in fulfillment of the requirements . for the Degree of . Doctor of Philosophy . March 2016

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Effects of sulfide and lead nitrate addition to a gold

Corrosion potentiodynamic polarization experiments on a gold electrode in a cyanide solution with 0–30 ppm lead addition and 0–20 ppm sulfide were carried out. Solutions containing 300 ppm NaCN, adjusted to a pH 11.1 by NaOH and bubbled with air were used at atmospheric pressure and room temperature. If the concentration of lead ions was equal or larger than the sulfide ions a change of

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INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF GOLD

Effect of lead nitrate addition on cyanidation of Havran, Ovacik, Mastra LCu (low copper) and Mastra HCu (high copper) gold ores was investigated by laboratory tests at the Ovacik Gold Mine Metallurgy Laboratory. Leach tests were performed at optimum NaCN additions and pH values while different lead nitrate additions were applied.

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Use Of Lead Nitrate In Gold Leaching

Lead nitrate can improve gold leaching speed and quantity.In some ores, particularly those.Despite being used in 90 of gold production,5 gold cyanidation.Chat online.Effect of lead nitrate on cyanidation of gold ores.Abstract.This paper discusses some of the latest efforts to improve the understanding of the use of lead.

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the effect of lead nitrate in the cyanidation of gold ore

Use Of Lead Nitrate In Gold Leaching Café Genuss. Pdf Influence Of Lead Nitrate On Cyanide Leaching Of Effect of lead nitrate addition on cyanidation of havran, ovacik, mastra lcu low copper and mastra hcu high copper gold ores was investigated by laboratory tests at the ovacik gold mine metallurgy laboratoryLeach tests were performed at optimum nacn additions and ph values while

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Cyanidation of a copper-gold ore ScienceDirect

Aug 01, 1997 Process. 50 (1997) 127-141 Effect of lead nitrate concentration 100 90 8O A 70 i 50 40 20 10 0 0 8 16 24 32 40 48 Time (h) Fig. 5. 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).

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US7025942B2 Control of lead nitrate addition in gold

A method for controlling the extraction of gold from a gold ore by the cyanidation process in which a leaching step including the addition of a lead compound, which is typically lead nitrate or other lead salt, is used. In order to maintain stable conditions in the leaching process, and to use the leaching reagents efficiently, an analysis step is used to monitor the concentration of

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Cyanidation of a pyrrhotite-bearing gold ore

The lime, sodium cyanide, lead nitrate and oxygen were all certified reagent grade chemicals. Distilled 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

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Gold cyanidation

Lead nitrate can improve gold leaching speed and quantity recovered, particularly in processing partially oxidized ores. Effect of dissolved oxygen [ edit ] Oxygen is one of the reagents consumed during cyanidation, accepting the electrons from the gold, and a deficiency in

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Gold Cyanidation Process 911 Metallurgist

Jun 08, 2016 The gold cyanidation process is the most important method ever developed for extracting gold from its ores. The reasons the widespread acceptance of cyanidation are economic as well as metallurgical. It usually obtains a higher recovery of gold than plate amalgamation and is easier to operate than the chlorine or bromine process.

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Cyanidation of Turkish Gold, Silver Ore and the Use of

Cyanide leaching of gold-silver ore, obtained from Artvin, Cerattepe region of Turkey, was investigated. The effects of NaCN concentration, solid/liquid ratio, type of pH adjustment reagent, lead nitrate and hydrogen peroxide (H 2O 2) additions in relation to the leaching time on gold

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Treatment of copper-rich gold ore by cyanide leaching

phases including copper sulphides present in the ore can also lead to the passivation of gold surface in addition to its consumption of cyanide and oxygen [1]. Pre-aeration of ore prior to cyanidation and/or addition of lead nitrate can be beneficial for mitigating problems associated with sulphide minerals during cyanidation of gold [13,14,16].

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Reactions of gold and sulfide minerals in cyanide media

Nov 01, 2002 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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