Options for Increasing the Rate of Bioleaching of Arsenic Containing Copper Concentrate

In the present work the effect of alkaline sulfide leaching (ASL) on the extraction of copper and zinc from low-grade copper concentrate containing chalcopyrite, tennantite, sphalerite, and pyrite during batch and continuous bioleaching experiments was studied. It was demonstrated that ASL and furth...

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Bibliographic Details
Published in:Microbiology research 2022-07, Vol.13 (3), p.466-479
Main Authors: Artykova, Alena, Elkina, Yuliya, Nechaeva, Aleksandra, Melamud, Vitaliy, Boduen, Anna, Bulaev, Aleksandr
Format: Article
Language:English
Subjects:
Arsenic
Arsenic content
Bacterial leaching
biohydrometallurgy
Chalcopyrite
Copper
Experiments
Gold
Heat exchangers
Hydrometallurgy
Leaching
Microorganisms
Minerals
Population
Pyrite
Reactors
Sphalerite
sulfide leaching
Sulfur content
tennantite
Testing laboratories
Titanium
two-stage processes
Zinc
Zincblende
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Summary:In the present work the effect of alkaline sulfide leaching (ASL) on the extraction of copper and zinc from low-grade copper concentrate containing chalcopyrite, tennantite, sphalerite, and pyrite during batch and continuous bioleaching experiments was studied. It was demonstrated that ASL and further bioleaching may be a promising approach for treatment of copper–zinc concentrates containing tennantite as this approach allows increasing copper extraction degree in comparison to one-stage bioleaching by 1.6–2.3 times. Thus, ASL was shown to be effective for pretreatment of tennantite containing concentrates to improve bioleaching for copper extraction. At the same time, ASL led to decrease in zinc extraction by 1.4–1.5 times. Therefore, the development of combined hydrometallurgical processes including ASL and bioleaching for effective metal leaching requires further studies to avoid negative effect on zinc extraction.
ISSN:2036-7481
2036-7481
DOI:10.3390/microbiolres13030032