Efficiency increase for gold-bearing ore deposits with respect to the influence of sulfide surface nanobarrier on metal adsorption
Journal Title: Metallurgical and Mining Industry - Year 2017, Vol 9, Issue 7
Abstract
With this publication we introduce the summarized scientific and application results of our theoretical explorations, laboratory researches and experiments within the industrial full-scale production, carried out for gold, namely, for finely dispersed gold or so-called nanogold, which is unseeable by optical microscope but has good recovery perspectives. With our research we demonstrate that some of world’s gold ore reserve with thereof type of gold in the form of pyrite and arsenopyrite disseminated mineralization is located in Bakyrchik gold deposit in Kazakhstan. Upon that, the part of the ore in this deposit contains two varieties of arsenopyrite (needlelike and elongated prismatic ones), and pyrite pentagonal dodecahedron habit. We study the problem how to increase the efficiency of operational cycle for gold deposits taking into account the influence of sulfide surface nanobarriers on metal adsorption. In this context, we also address extraction technology development for finely dispersed gold. A wide range of methods were used for the current research: the analysis of the earlier conducted researches, the observations and their control, the mathematical and physical simulation, the analysis and statistical processing of the results, determination of dependences, the calculations and the control, the experimental studies and measurements in accordance with the conventional standard and the new techniques. We consider and explain our point of view that the further researches of gold-containing reliefs are expected to allow determining the gold absorption degree in pyrite and arsenopyrite. The current article deals with the new results of the comparative analysis on the properties of the nanorelief containing different gold-bearing sulfides. Morphology, microtopography of auriferous pyrites and arsenopyrites are described in it. Based on oxidation and reduction reactions, we have also revealed the mechanism of gold adsorption on sulfide surfaces. It has been determined that gold is adsorbed on the surface of arsenopyrite rather than on pyrite. The new system of principle testing has been developed and implemented at the gold-processing plant, it allows a remarkable improvement on the results trustworthy, reduction in labour requirement and decrease in the number of tests commonly conducted by the laboratory for this operation as much as 6 times.
Authors and Affiliations
A. E. Vorobyov, V. I. Lyashenko, Tcharo Honore, K. A. Vorobyev
Keywords
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