Stage-activation leaching of oxidized copper–gold ore: Theory and technology

Rasskazova, A. V.; Kirilchuk, A. G.; Vasyanovich, Yu.A.

doi:10.17580/em.2020.01.10

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Clustered hydrated complexes are produced at electro-photochemical processing of aqueous solutions of lixiviant. These complexes are highly active in relation to a coated part of a gold cluster [28,29].…”

Section: Direct Gold Leaching By Active Chloride-based Reagent (Without Pre-treatment)mentioning

confidence: 99%

Assessment of the Possibility of Hydrometallurgical Processing of Low-Grade Ores in the Oxidation Zone of the Malmyzh Cu-Au Porphyry Deposit

Rasskazova

2021

Minerals

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The geochemical features of the ores present in the oxidation zone of the gold-copper Malmyzh mineral deposit are characterized. This deposit is located in the the Nanaian region of the Khabarovsk Territory in the Russian Federation, and a technological assessment of ores present was carried out. The initial gold content in the oxidized ore is 0.1–1.2 ppm, and the leachability of gold from different size fractions by hot cyanide revealed the fact that the ore is not refractory and characterized by increased cyanide consumption. The results demonstrated a high gold content in fine size fractions. Different leaching reagents were applied for oxidized ore testing. These reagents were used both for oxidative pretreatment and leaching process. Activation of solutions was carried out by electrolysis and UV radiation. Different reagent combinations were tested in laboratory with the highest gold recovery (94%) provided by the chloride system with peroxide-sulfuric pretreatment of the oxidized ore. The same reagent combination resulted in 91–94% gold recovery during the column leaching of crushed (−10 mm) ore.

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Section: Direct Gold Leaching By Active Chloride-based Reagent (Without Pre-treatment)mentioning

confidence: 99%

Assessment of the Possibility of Hydrometallurgical Processing of Low-Grade Ores in the Oxidation Zone of the Malmyzh Cu-Au Porphyry Deposit

Rasskazova

2021

Minerals

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“…The advancement in science and technology spurred a breakthrough in this trend. Heap leaching is in acute demand in the modern geotechnology [4]. For another thing, heap leaching needs to be environmentally safe.…”

Section: Introductionmentioning

confidence: 99%

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Fedotov¹,

Сенченко²,

Fedotov³

2022

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The study addresses efficiency of heap-leach cyanidation as function of processing properties of ore. The grain size composition, chemistry and mineralogy represent the main ore properties. The test ore samples contain up to 76% of aluminum and silicon oxides. The ore features a few impurities and a moderate amount of sulfide sulfur (0.6%). Assaying after preliminary gravity separation of gold shows that average Au content is 1.74 g/t (site 1) and 1.43 g/t (site 2). This research aims to analyze the processing properties of ore and assess expediency of heap-leach cyanidation of this ore. The representative samples for the heap leach tests are the primary sulfide ore. The lab-scale tests of agitation cyanidation of ore samples from different sites were carried out using bottle agitator. The scope of the analysis also embraced the influence of the ore size and cyanide concentration on the leaching efficiency. Furthermore, adsorption of gold from cyanidation solutions was also tested. The cyanidation products were subjected to atomic adsorption spectroscopy (solution) and assaying (cake).

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Efficiency Gains When Using Activated Mill Tailings in Underground Mining

Brigida,

Golik,

Klyuev

et al. 2023

Metallurgist

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Stage-activation leaching of oxidized copper–gold ore: Theory and technology

Abstract: Comparative analysis of rocks structural-textural characteristics studies by computer X-ray microtomography and quantitative microstructural analysis methods. Obogashchenie rud.

Cited by 3 publications

References 9 publications

Assessment of the Possibility of Hydrometallurgical Processing of Low-Grade Ores in the Oxidation Zone of the Malmyzh Cu-Au Porphyry Deposit

Assessment of the Possibility of Hydrometallurgical Processing of Low-Grade Ores in the Oxidation Zone of the Malmyzh Cu-Au Porphyry Deposit

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Efficiency Gains When Using Activated Mill Tailings in Underground Mining

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