Lead Nitrate In Gold Leaching

  • MODELING OF GOLD CYANIDATION

    Figure 17 Effect of lead nitrate addition on the leaching of a gold ore with pyrite, pyrrhotite and chalcopyrite. ..... 43. Figure 18 Effect of lead (II) on sulfide oxidation in the absence and presence of ... cyanide (20.4 mM NaCN, 10 mM S2-, oxygen sparged)..... 43 Figure 19 Effect of oxygen and lead nitrate on gold leaching. Condition: [CNØ ...

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  • Gold cyanidation - Wikipedia

    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 of accelerating the gold dissolution rate. Slurry Density

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  • INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF …

    A further increase of lead nitrate to 0.3 kg/Mg resulted in the decrease of Au and Ag leach recovery by comparing with the test of 0.2 kg/Mg lead nitrate, indicating the formation of Pb(OH) 2 passive layer on gold. Besides, NaCN consumption increased from 0.24 kg/Mg without lead nitrate to 0.27 kg/Mg with 0.1 kg/Mg lead nitrate addition.

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  • 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 rates. The main aim for adding lead nitrate is to help in Gold dissolution in CIL plants. Should the gold solid tails be the main aim for dosing lead nitrate in the treatment of slightly compl

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  • Effect of lead nitrate on cyanidation of gold ores ...

    The formation of a passive layer on gold particles has a significant influence in the initial stages of leaching. The addition of lead nitrate notably decreased its inhibiting effect. In one case study, the lead nitrate treatment increased the overall gold extraction and decreased the cyanide consumption for an additional gross revenue of $ CND ...

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  • (PDF) Effect of lead nitrate on cyanidation of gold ores ...

    While galena (PbS) is a trace lead mineral in some of the ores processed in Portovelo, processing centers also add lead nitrate to the gold cyanidation tanks to reduce cyanide consumption and ...

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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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  • INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING OF …

    cyanide leaching by addition of 300 g/Mg lead nitrate to the leach slurry. Furthermore, numerous studies have shown that lead nitrate addition reduces the detrimental effect of metallic sulfides, increases gold leaching recovery and/or inhibits the dissolution of metallic sulfides, thus reduces cyanide consumption (Deschenes et al., 2003).

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  • Effect of lead nitrate on cyanidation of gold ores ...

    Oct 01, 2000· Effect of lead nitrate on cyanidation of gold ores 1277 The second gold ore, with 2.7% pyrite and 3.0% arsenopyrite, requires a very short pre-leaching time (between two and six hours) and 25-50 g/t lead nitrate.

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