MECHANOCHEMICAL ACTIVATION OFTHE PROCESSING OF GOLD-BEARING SULFIDE RAW MATERIALS
Begalinov A. Shautenov M. Medeuov C. Almenov T. Bektur B.
2021National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2021#6Issue 45046 - 52 pp.
The mechanochemical activation of the gold-bearingflotation concentrate with the addition of copper sulfate in the grinding process has been studied. It has been established that as a result of the mechanical activation, gold is partially leached due to sulfur content in the source raw material, which acts as a leaching agent. At the stage of grinding and extraction of gold into solution was 48%. Mechanical processing is one of the most important operations in mineral processing technology. Ore processing must be organized in such a way as to ensure the mineral liberation with optimal grinding of the ore. This process largely determines both the completeness of the extraction of minerals and elements from rocks, and the kinetics of various heterogeneous processes involving solid substances in a finely dispersed state. Attempts to use the process of mechanical activation to increase the efficiency of mineral raw materials have been made for a long time. Specialized and generalizing works have shown that with an increase in dispersion leading to an increase in the substance activity, it is possible to intensify many technological processes: ore liberation, leaching of individual components from minerals, complete extraction of valuable elements from refractory ores and concentrates. Mechanical activation, to some extent, leads to a change in the structural and physicochemical properties of minerals, especially surface ones. The research has ensured a fairly complete list of physicochemical changes in mineral matter and the transformation of materials during dispersion. An analysis of works on the mechanochemistry of minerals shows the variety and complexity of the physicochemical processes during mechanical activation, and leads to the conclusion that the reactivity of minerals is determined both by a change in the fine crystal structure and an increase in the surface, and by solid-phase reactions, i.e. the processes accompanying mechanical processing.
cake , flotation concentrate , gold , gold-bearing raw materials , grinding , leaching , mechanochemical processing , reduction-oxidation potential , sedimentary test , solution , sulfite-thiosulphate leaching
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Satbayev University, Almaty, Kazakhstan
Satbayev University
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