INTEGRATED HEAP LEACHING OF REBELLIOUS GOLD FROM ALTERED MINERAL WASTE
This study was supported by the Presidium of the Far East Branch of the Russian Academy of Sciences, Project no. 18-2-015: Gold-copper-porphyritic mineralization in the Russian Far East: Indicators of geodynamic behavior, metalliferous magmatism and geochemical mineralogical features of metallogenic magmatic systems in the context of prediction, prospecting, appraisal and development technology for such type deposits Mineral waste management is a topical issue of the current concern. Content of valuable components in mineral waste is often higher than in natural ore bodies. Major problems of heap gold leaching from such waste is mudding and inapproachability of disperse gold particles for complexing agents. This study aims to assess efficiency of highly active oxidizers in stimulation of extractability of disperse gold from altered mineral waste. The research procedure of activated heap leaching includes nodulizing of mineral mass using solutions of hydrated active oxygen after electro-photo-chemical treatment, ageing of nodulized mass in piles obtained by different variants of stacking various particle-size fractions and sprinkling of the piles by solutions of gold complexing agents. The discussed new approach to disperse gold extraction from slurry fractions of altered mineral waste consists in differentiated arrangement of coarse and nodulized fine fractions. As a result, permeability of leaching piles is improved, and uniform penetrability is ensured for leaching solutions, which ensures increased gold recovery in pregnant solution. A feature of the proposed approach diffusive oxidation of minerals-concentrators of disperse and encapsulated gold by means of impregnation with solution containing activated hydrated oxygen (including peroxy compounds). Experimental tests on activated leaching from nodulized slurry fractions and coarse fractions of waste piles at some mines reveal that this integrated approach ensures extraction / additional recovery of gold in the range of 55-70%.
Acknowledgements: This study was supported by the Presidium of Far Eastern Branch of Russian Academy of Sciences, Project No. 18-2-015.
For citation: Sekisov A. G., Rasskazova A. V., Litvinova N. M., Kirilchuk M. S. Integrated heap leaching of rebellious gold from altered mineral waste. MIAB. Mining Inf. Anal. Bull. 2019;(8):198-208. [In Russ]. DOI: 10.25018/0236-1493-2019-08-0-198-208.
: Sekisov A. G., Rasskazova A. V., Litvinova N. M., Kirilchuk M. S.
A.G. Sekisov, Dr. Sci. (Eng.), Professor, Chief Researcher,
A.V. Rasskazova, Cand. Sci. (Eng.), Senior Researcher,
N.M. Litvinova, Cand. Sci. (Eng.), Head of Laboratory,
M.S. Kirilchuk, Graduate Student,
Mining Institute, Far Eastern Branch of Russian Academy of Sciences,
680000, Khabarovsk, Russia.
Corresponding author: A.G. Sekisov, e-mail: firstname.lastname@example.org.Key words
Gold placer, magnetic minerals, fine gold, gold loss, gold extraction, washing machine, deep and shallow filling gateways, magnetic separation.References
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