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Article name USE OF PHOTOCHEMICAL AND ELECTROCHEMICAL PROCESSES WHEN LEACHING GOLD FROM THE SECONDARY MINERAL RAW MATERIAL
Authors Sekisov A.. ,
Rasskazova A.. ,
Rubtsov Y.I. ,
Lavrov A.Y. ,
Trubachev A.I. ,
Bibliographic description
Category Earth science
DOI 622.7
DOI 10.21209/2227-9245-2019-25-7-70-83
Article type scientific
Annotation Flotation tailings and cyanidation residual of Darasun mineral processing plant, lead flotation tailings of Novoshirokinsk processing plant contain a significant amount of gold to be recovered. The tailings are valuable mineral raw material in case of application of the technologies providing economically acceptable level of extraction. The geotechnology of a percolation activated gold leaching has been tested in this research. A direct cyanide leaching provides only 14…29 % of extraction of gold from this secondary mineral raw material. Activated leaching sodium bicarbonate - cyanide solution significantly increases gold extraction (by 25…55 %) in comparison with standard cyanidation. This solution is prepared by electro-photo-chemical processing of an aqueous solution of the corresponding reagents in reactors. Activated solution is used both for agglomeration of flotation tailings and for irrigation of each column. Kinetic curve of gold leaching demonstrates that the main portion of gold is recovered at the diffusion oxidation stage and selective dissolution during the curing. The economic calculations which are carried out on the basis of the results received during the experiments and account parameters show that gold recovery from flotation tails and cyanidation residual is profitable actually without the accompanying copper extraction.
Key words Keywords: photochemical processes; electrochemical processes; leaching; dispersed gold; secondary mineral raw material; flotation tailings; cyanidation residual; activated solutions; standard cyanidation
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Full articleUSE OF PHOTOCHEMICAL AND ELECTROCHEMICAL PROCESSES WHEN LEACHING GOLD FROM THE SECONDARY MINERAL RAW MATERIAL