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leaching gold with potassium ferricyanide

  • Potassium ferrocyanide GoldRefiningWiki

    Usage as a gold leach . Potassium ferrocyanide might be usable as an alternative to cyanide leach and since it is much easier to get hold on it might be a working alternative for hobby refiners. Even if it is less toxic in its ferro form it still have all the dangers associated with cyanide and acids.

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  • CN103290232A Method for extracting gold from auriferous

    The invention relates to a method for extracting gold through potassium ferricyanide. The method is characterized in that the gold is extracted from the auriferous ores under an alkaline environment at normal temperature and pressure with nontoxic ferricyanide serving as a gold leaching agent and calcium peroxide serving as a leaching adding agent and the method is a completely novel cyanide

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    Use of ferricyanide for gold and silver cyanidation

    Use of ferricyanide for gold and silver cyanidation F. XIE, D. B. DREISINGER accepted 20 April 2009 Abstract: Low gold and silver leaching kinetics has been commonly observed in traditional goldsilver cyanidation process, especially in heap leaching and in situ leaching operations. (KMnO4) for gold and silver cyanidation process has

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  • Use of ferricyanide for gold and silver cyanidation

    Ferricyanide has been investigated as an alternative oxidant to oxygen in the cyanide leaching of certain gold and silver sulphides which are similarly slowleaching in cyanide (Xie and Dreisinger

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  • Study on the Gold Leaching Process by Potassium Ferricyanide

    The traditional gold leaching method is cyanidation, which carries serious security and environmental problems. More and more attention is paid to the research on noncyanide process. A higharsenicandsulphur refractory gold concentrate in Sichuan was taken as the object of study. After the roastingoxidation pretreatment of the sample, potassium ferricyanide was adopted to carry on the

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  • Potassium Ferricyanide Leach Gold Refining Forum

    2. Dissolve some Potassium Ferricyanide in the solution. Is 2g/L about the right concentration ? 3. Add a small amount of oxidizer to the solution Hydrogen Peroxide. 4. Place some gold plated items in the solution. 5. Place the beaker in a safe location in sunlight

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  • Study on the Gold Leaching Process by Potassium Ferricyanide

    The results showed that good leaching effects could be achieved by potassium ferricyanide. When the amount of potassium ferricyanide was 60g/L, the concentration of NaOH 0.2mol/L, the liquidsolid

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  • Iron in Cyanidation Ferrocyanide Compounds

    Potassium ferricyanide is decomposed by hot, dilute sulphuric acid to hydrocyanic acid. A cyanide solution containing potassium ferricyanide dissolves gold in the absence of oxygen: KFe(CN)6 + 2 KCN + Au = K4Fe(CN)6 + KAu(CN)2. Potassium ferricyanide in slightly acid solutions reacts with potassium iodide forming the ferrocyanide and free

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  • Effect of Potassium Cyanide on Gold Metals

    The discovery that metallic gold is soluble in potassium cyanide came after studying the action of cyanides on plates of gold, and announced that they were slowly dissolved. Metallurgists pointed out that goldleaf is dissolved by a dilute solution of the salt, and also showed that if the gold floats on the surface of the liquid, so that one side of the leaf is in contact with the air, while

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  • Use of ferricyanide for gold and silver cyanidation

    Use of ferricyanide for gold and silver cyanidation F. XIE, D. B. DREISINGER Department of Materials Engineering, University of British Columbia, 3096350 Stores Road, Vancouver, BC, Canada V6T 1Z4 Received 4 December 2008 accepted 20 April 2009 Abstract: Low gold and silver leaching kinetics has been commonly observed in traditional goldsilver cyanidation process, especially in heap

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