how to apply lead nitrate in leaching pyrite gold

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PDF EFFECT OF LEAD NITRATE ON CYANIDATION OF ,

Pre-leaching was deleterious for the ore containing chalcopyrite while pre-leaching with lead nitrate was very efficient to decrease the reactivity of ,...

US20020182133A1

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 ....

Determination of the leaching parameters for a refractory ,

May 01, 2009 0183 32 Removal of coarse gold by gravity increased the extraction by 28 leach residue at 074 g/t Au Increasing the DO to 16 ppm or the lead nitrate from 500 to 1,000 g/t increased the overall gold extraction to 904 leach residue at 062 g/t , which is the maximum gold extraction obtained The leaching parameters were 800 ppm NaCN, DO 16 ppm ....

The Use of Oxygen in Gold Cyanidation Canadian ,

Jul 18, 2013 0183 32 Oxygen demand of each gold ore is dependent on the pyrite content and its mineralogical origin The oxidation of sulphide ion into sulphate and iron into ferric ion during pretreatment is beneficial to subsequent cyanide consumption Gold leaching optimization studies were performed with one gold ore sample...

Effect of Lead Nitrate on pH

The difference in the nature of the results may be related to the amount of pyrite, the length of the pre-leaching, and the amount of lead nitrate added The gold content in the leach residue was higher by about 015 grt in absence of lead nitrate This value does not seem to be very high...

Investigation on the cyanide leaching optimization for the ,

Jul 01, 2005 0183 32 The addition of lead nitrate, to the leaching of the site UFG somewhat improved the leaching rate However, the improvement of the gold leaching kinetics is not significant with only an increase of 4 in 6 h for the leach kinetics as indicated in Fig 10 Download Download full-size image Fig 10...

Gold Extraction

After 12 months of laboratory investigation, three options were identified to solve the problem leaching at pH value lower than 10, increasing the DO of the slurry, or using lead nitrate The significant effect of pH on gold leaching pointed to stibnite as the origin of the problem...

hydrometallurgy effect of lead nitrate concentration on ,

how to apply lead nitrate in leaching pyrite gold 25/02/2021 Effect of Lead Nitrate on Gold Leach Kinetics Lead Nitrate addition in CIL operations and how the dosage of Pb Lead nitrate affects gold leaching kinetic rat The main aim for adding lead nitrate is to help in Gold dissolution in CIL plants...

how to apply lead nitrate in leaching pyrite gold

how to apply lead nitrate in leaching pyrite gold Comparable gold extractions were observed in the leaching of the composite ores containing various sulfide minerals such as pyrite pyrrhotite chalcocite galena and chalcopyrite FIGURE 516 EFFECT OF LEAD NITRATE ON GOLD EXTRACTION AND THIOSULFATE CONSUMPTION 116 Get price...

Leaching Adsorption Resource Book

must be added which can add considerably to the cost of leaching the gold Other minerals, such as arsenic can react with the oxygen and slow the rate of gold dissolution Lead Nitrate Lead nitrate is added to the leach circuit and has the effect ,...

Effect of Lead Nitrate on Gold Leach Kinetics ,

Lead Nitrate addition in CIL operations and how the dosage of Pb Lead nitrate affects gold leaching kinetic rat The main aim for adding lead nitrate is to ,...

Emerging technologies in cyanidation of gold and silver a ,

The 82 gold extraction was obtained using 250 ppm NaCN, 500 g/t lead nitrate, 30 g/t kerosene, DO 10 ppm and pH 105 in 96 hours The removal of coarse gold 057 weight, 272 was performed with a Knelson concentrator and a Mosley table Cyanidation of the gravity residue increased the overall extraction to 904 leach residue at 077 g/t Au...

INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF ,

hours leaching by the addition of lead nitrate as 01-05 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...

Effect of lead nitrate on cyanidation of gold ores ,

Oct 01, 2000 0183 32 Abstract This paper discusses some of the latest efforts to improve the understanding of the use of lead nitrate in cyanidation The study is based on an electrochemical approach to establish the nature of the mechanisms related to gold, a surface analysis study, using X-ray photoelectron spectroscopy XPS , to determine the modifications on gold and ,...

Dissolving Ore?

Oct 15, 2016 0183 32 As for dissolving the gold that is not what I want, I want to dissolve the pyrite to get the free gold out The idea of cooking it for a while sounds interesting but I don t think 400 degrees would be adequate, but its worth a try because it s not a large enough quantities to spend a great deal of money on, maybe a penny weight of gold...

MODELING OF GOLD CYANIDATION

Figure 15 Effect of pyrite, chalcopyrite, pentlandite and oxygen on gold , 5, 22ºC 40 Figure 16 Effect of arsenopyrite, galena and oxygen on gold dissolution , 41 Figure 17 Effect of lead nitrate addition on the leaching of a gold ore with pyrite, , and presence of cyanide 204 mM NaCN, 10 mM S2-, oxygen sparged , 43 Figure 19 ....

Kinetics and mechanism of leaching synthetic calaverite in ,

Aug 01, 2006 0183 32 Calaverite is a gold telluride species with the composition AuTe 2 - Calaverite is usually characterized by an exceedingly slow dissolution rate in cyanide solution Cyanidation of slurry containing synthetic calaverite P 90 of 10 μm was studied to determine the leaching kinetics and surface reactions Alkalinity, dissolved oxygen, lead nitrate and sulfide minerals ,...

The use of oxygen in gold cyanidation

Jan 01, 1996 0183 32 A regression analysis of the gold dissolution rate data gold dis- solution rate = Yr e 10 12 mol/cm3s generates several inter- esting results 33 Lead nitrate ects All variables tested in the experimental design have a sig- nificant effect on gold dissolution rate, with lead nitrate addition having a pronounced effect...

Silver Nitrate Used To Monitor In Gold Leaching

How to apply lead nitrate in leaching pyrite goldApr 24 2017 the chlorine reacts with the gold inside the ore to form gold chloride filter the ore and bleach solution to remove all the impurities such as soil and rock fragments collect the filtered gold chloride solution in a flask place powdered sodium metabisulfate in another...

process for recovery of lead nitrate

Oct 19, 2021 0183 32 how to apply lead nitrate in leaching pyrite gold The effect of lead nitrate on Au recovery in cyanidation Lead nitrate addition did not effect silver extraction from the ore Dissolution of silver was observed to occur largely over an initial period of 1 h Silver recoveries were 12 14 Ag over 24hours Fig2 More Detail A ,....

Effect of lead nitrate on cyanidation of gold ores ,

Oct 01, 2000 0183 32 This paper discusses some of the latest efforts to improve the understanding of the use of lead nitrate in cyanidation The study is based on an electrochemical approach to establish the nature of the mechanisms related to gold, a surface analysis study, using X-ray photoelectron spectroscopy XPS , to determine the modifications on gold and sulphide ,...

Effect of Oxidative Pretreatment and Lead Nitrate Addition ,

Nov 01, 2019 0183 32 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 332 ppm Au, 109 As, and 05 sulfur were investigated Au recovery was ,...

PDF The Use of Oxygen in Gold Cyanidation Wesley ,

This influence is 5 7 where gold dissolution rate has been plotted vs dissolved clearly illustrated in the 3D graph of Fig 3 where cyanide oxygen and free cyanide concentration for lead nitrate consumption has been plotted vs leaching pH and cyanide con- additions of 00, 125 and 250 g/t, respectively...

Minerals Free Full

Nov 20, 2012 0183 32 Lead was also detected on the surface oxide or hydroxide Sulphide and copper compounds cyanide and sulphide were reaction products responsible for inhibiting the dissolution of gold Lead nitrate added in the Hunt leaching of bornite produced 99 gold extraction Surface reaction products were similar to djurleite...

Influence of lead nitrate on cyanide leaching of gold and ,

Results showed the increase in gold and silver recoveries between 04-12 for gold and 39-116 for silver at the end of 24 hours leaching by the addition of ,...

Gold Metallurgy Leaching in Cyanicides

Jul 14, 2016 0183 32 Optimize Gold Leaching Recovery with Chromium Minerals Lead Chromite PbCrO4 5 Cyanidation as applied to ordinary gold and silver ores is a relatively simple process When cyanicides cyanide-consuming elements are encountered in small amounts in the treatment of such ores, the various schemes already discussed, such as use of a lead salt ....

use of lead nitrate in gold leaching

how to apply lead nitrate in leaching pyrite gold use of lead nitrate in gold leaching Grinding Mill China Lead nitrate can improve gold leaching speed and quantity recovered, particularly in processing , Inquire Now Control of lead nitrate addition in gold recovery Her ....

INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF GOLD ,

Jan 06, 2014 0183 32 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 Ovacik ,...

pyrite where is it mined

Pyrite Cube for sale eBay HUGE OLD-TIME PYRITE CUBES CRYSTAL CLUSTER, SHANGBAO MINE, CHINA 15000 1490 shipping Watch B1393 486g Pyrite Square Cube Crystals on Matrix Cluster Victoria Mine Spain 9499 1469 shipping or Best Offer Watch PYRITE CUBE Cluster from Peru A Shimmering Crystal Fools Gold For Sale...

Leaching parameters and performance for the free milling ,

Download scientific diagram Leaching parameters and performance for the free milling sulphide gold ores from publication Effect of lead nitrate on cyanidation of gold ores Progress on the ....