DOI: 10.18503/1995-2732-2021-19-2-14-22
Abstract
Now, growth of the country's resource potential largely depends on the study of natural and man-made high-сlay gold-bearing placer deposits of the Far Eastern Region, and development of technologies and equipment for exploitation. This paper analyzes known methods and means of processing high-сlay gold-bearing sands applied and proposed for their use at facilities with a higher content of fine fractions of valuable components. The author studied and proved by experiments and analysis a polymineral nature of placers of gold-bearing deposits on Antoine Square in the southern part of the Khabarovsk Territory. Sands mainly contain gold, silver, manganese, vanadium, zinc, tungsten, nickel and other valuable components. A laser diffraction microanalysis has established a significant amount of micron-sized particles, including valuable components. It was found that a predominant distribution of mineral particles in sizes is less than 45 µm. Enclosing rock is dominated by montmorillonite, a clay mineral. Taking into account sustainability and efficiency of the processing technology, it is reasonable to develop the use of hydrodynamic effects on high-clay rocks of placers. When designing a set of facilities, it is required to factor in granulometry, a mass fraction of a silt-clay faction, gold morphology and other valuable components. The paper presents practical approaches to the development of the field in question with improved technical facilities. To ensure technological efficiency and resource conservation, when processing high-clay rocks, it is proposed to use a geotechnical complex with hydrodynamic cavitation reactors that do not require additional energy, and automatic gravity dressing plants with automated lifting of riffles or automated washing by turning a collecting surface. By designing such automated plants as multi-level ones, we can improve performance by increasing a collecting surface area by 40 times.
Keywords
High-clay sands, disintegration, geotechnical complex, cavitation reactor.
For citation
Khrunina N.P. Improving the Complex of Means for the Processing of High-Clay Gold-Bearing Sands of Placers. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2021, vol. 19, no. 2, pp. 14–22. https://doi.org/10.18503/1995-2732-2021-19-2-14-22
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