Cheban A.Yu. Increasing the Efficiency of Open Mining Through Improving Screening and Crushing Transfer Points

DOI: 10.18503/1995-2732-2025-23-2-28-34

Abstract

Problem Statement (Relevance). When conducting open-pit mining, a large amount of technogenic waste is generated, which is sent to rock dumps, as well as stacks of substandard ore, which may contain a significant proportion of metal extracted from the subsoil. In a number of deposits of non-ferrous and precious metals, after explosive loosening, the fine-sized ore mass is significantly enriched with a useful component, while the fine fraction of substandard ores also has an increased metal content, sufficient for cost-effective processing using heap leaching. Objective is justification of a resource-saving, low-waste technology for the development of deposits of valuable mineral raw materials with the separation of a productive fine fraction from substandard ores during their transportation by combined automobile-conveyor transport by expanding the functionality of the screening and crushing transfer point of the quarry. Results. The article proposes a scheme of combined transport using an improved screening-crushing transfer point, which ensures the release of a productive fine fraction in the process of reloading the ore mass from road transport to a conveyor, which is collected in an accumulating tank, and then reloaded into a special vehicle for movement to the processing site. The possibility of using the solution proposed in the article in relation to one of the gold deposits is considered. Conclusions. Studies have shown that the separation of an enriched fine fraction from substandard ores at the transfer point will make it possible to additionally send ore mass containing more than 8% of the metal extracted from the subsoil to heap leaching, and to reduce losses of gold from stored substandard ores by 1,74 times. In addition, the removal of fine fractions from substandard ores will reduce the dusting of stacks and reduce the formation of toxic components when stacks are exposed to atmospheric precipitation.

Keywords

ore deposits, substandard ores, metal losses, enriched fine fraction, combined quarry transport, screening, heap leaching

For citation

Cheban A.Yu. Increasing the Efficiency of Open Mining Through Improving Screening and Crushing Transfer Points. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 2, pp. 28-34. https://doi.org/10.18503/1995-2732-2025-23-2-28-34

Anton Yu. Cheban – PhD (Eng.), Associate Professor, Leading Researcher, Mining Institute of the Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences (MI KhFRC FEB RAS), Khabarovsk, Russia. Email: chebanay@mail.ru. ORCID 0000-0003-2707-626X

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