Article name Research of Environmentally Friendly methods of Increasing the Extraction of Gold from Stubborn Mineral Raw Materials
Authors Shumilova L.. ,
Khatkova A.. ,
Razmakhnin K.. ,
Prostakishin M.F. executor of the RNF project 22-17-00040,
Bibliographic description Shumilova L. V., Khatkova A. N., Razmakhnin K. K., Prostakishin M. F. Research of environmentally friendly methods of increasing the extraction of gold from stubborn mineral raw materials // Transbaikal State University Journal. 2023. Vol. 29, no. 3. P. 74–90. DOI: 10.2109/2227-9245-2023-29-3-74-90.
Category Subsoil Use, Mining Sciences
DOI 622,7
DOI 10.2109/2227-9245-2023-29-3-74-90
Article type Original article
Annotation The development of portable modular collapsible complexes that can be placed at the bottom of spent quarries for processing off-balance ores and stale tailings located in close proximity to their storage sites is an urgent scientific problem. The aim is an experimental study in laboratory conditions of the technology of leaching gold from the charge of waste from mining enterprises based on the use of environmentally friendly methods of intensification of the leaching process. The research tasks consisted of two stages. Stage I – analysis of the development of the gold mining industry in the modern world, investments and trends. Stage II – testing in laboratory conditions on an enlarged laboratory sample of the technology of leaching gold from the charge of waste from mining and processing enterprises using intensification methods that reduce the consumption of sodium cyanide. It is established that in accordance with the state program of the Russian Federation “Reproduction and use of natural resources”, according to long-term forecasts, starting from 2024, it is planned for the first time to develop man-made raw materials, the volumes of which will gradually increase by 2030. The price of gold in the world remains at a fairly high level, with a high degree of probability it can be predicted to increase locally, up to a new maximum. The dependences of: gold extraction from the charge on the content of the class minus 0.071 mm; the concentration of gold in the solution on the duration of leaching and the content of the class minus 0.071 mm; gold extraction from the pelletized charge of technogenic raw materials on the fineness of grinding and methods of intensification of the leaching process: fine grinding; glet additive; activation of the NaCN solution with ozone. The extraction of gold into the solution was 88.4 %. The consumption of sodium cyanide with the use of environmentally friendly intensifying methods has decreased by 1.3 times (from 0.4 to 0.31 kg/t).
Key words gold mining industry,dynamics of gold production,reproduction and use ofnatural resources, miningwaste, heap leaching,environmentally friendlymethods of leachingintensification, fine grinding,activation of sodium cyanide,lead glet, ozone
Article information
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