Geochemical features and geotechnical investigation of oxidized zone in the Malmyzh copper–gold ore deposit

Rasskazova, A. V.; Ivanov, V. V.; Ignatyev, E. K.

doi:10.17580/gzh.2018.10.05

Cited by 5 publications

(4 citation statements)

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“…This fact most likely indicates the binding of cyanide to metastable cluster complexes by percarbonates. As a result, 70% of gold was extracted in almost 40 days using the electro-photo-activated leaching, while according to the standard scheme -50% [8].…”

Section: Resultsmentioning

confidence: 99%

Clustering of protons as the main factor in increasing the activity of leaching solutions at their electrochemical and photochemical processing

Rasskazova

2020

E3S Web Conf.

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The theoretical substantiation for the proton clustering process during electrochemical and photochemical processing of technological solutions is provided in the paper. This process provides a significant increase in the efficiency of leaching of gold from refractory ores. It was proposed that the chemical processes in aqueous solutions occur not only due to electronic (interelectronic) interactions, but also as a result of proton-electron interactions. The hypothesis is substantiated. Proton-electron interactions play an important role in the destruction and formation of chemical bonds between the solvent and the solute, as well as between dissolved substances. Compounds with a polymer-like structure can be formed during the electrolysis of aqueous solutions of different reagents, containing oxygen dimers (O-O). Hydrated cluster shell of active water molecules is formed around these polymer-like compounds. A metastable region of clustered protons is formed. Water-gas emulsion is formed during electrolysis and irradiatin with UV light. Highly active oxidants such as atomic oxygen, superoxide radical ion, ozone, and hydroxyl radical are synthesized in the gas bubbles. These compounds intensify protonation processes during hydration. The results of experiments on column activation leaching of dispersed gold from large-volume sample of refractory ore from the Pogromnoye deposit prove the validity of the theoretical substantiations.

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Section: Resultsmentioning

confidence: 99%

Clustering of protons as the main factor in increasing the activity of leaching solutions at their electrochemical and photochemical processing

Rasskazova

2020

E3S Web Conf.

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“…The subject of this research is the Malmyzh copper-gold deposit in the Khabarovsk Krai. The only economically expedient method to recover the low-grade copper and gold ore from the oxidation zone of this deposit is heap leaching [2,3].…”

Section: Introductionmentioning

confidence: 99%

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

Rasskazova¹,

Kirilchuk²,

Vasyanovich³

2020

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“…Oxidizing preparation for the processing of refractory gold-copper ore, containing iron impurities, is proposed. Oxidation is carried out with electro-photo-activated solutions [5].…”

Section: Introductionmentioning

confidence: 99%

Substantiation of the effective geotechnological parameters of activation heap leaching of gold from refractory ores

Rasskazova

Korpi²

2020

E3S Web Conf.

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The difficulties associated with the hydrometallurgical processing of refractory ores and some methods of their solution are discussed in the article. Difficulties associated with leaching of goldcopper ores are characterized. Gold and copper content is 0.5 ppm and 0.37 % respectively in the primary ores of the Malmyzh deposit. The ore is characterized as low grade. The geotechnology method of heap leaching is feasible for low grade ores processing. The characteristics of ore material favorable for heap leaching are listed in the paper. The current trends in ore preparation for heap leaching are briefly described. Hydrodynamic parameters of spraying are one of the important aspects influencing the process result. The hydrodynamic regimes implemented in the processes of heap leaching are listed and methods for determining the rational irrigation regime and the method of feeding the solution are given. Technological studies are required for any type of ore to assess the feasibility of heap leaching. Typically, technological studies begin with laboratory stage, then large-scale research are performed and the pilot-plant tests allows assessing the feasibility of the technology on the industrial scale. In this study, laboratory scale column leaching research were carried out. A method of activation chloride leaching with sulfuric acid-peroxide pre-oxidation was developed and tested. The leaching solutions were activated by the method of electro-photo-chemical activation with sequential electrolysis and ultraviolet irradiation. As a result of the experiment, 68-80% copper recovery was achieved.

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Geochemical features and geotechnical investigation of oxidized zone in the Malmyzh copper–gold ore deposit

Cited by 5 publications

References 0 publications

Clustering of protons as the main factor in increasing the activity of leaching solutions at their electrochemical and photochemical processing

Clustering of protons as the main factor in increasing the activity of leaching solutions at their electrochemical and photochemical processing

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

Substantiation of the effective geotechnological parameters of activation heap leaching of gold from refractory ores

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