BIOLEACHING OF COPPER SULPHIDE FLOTATION CONCENTRATE IN BATCH REACTION SYSTEM USING MESOPHILE AND THERMOPHILE MICROORGANISMS

This work aimed at approaching the use of concentrated mesophile and thermophile microorganisms (moderate and extreme ones) in leaching process of copper sulphides flotation concentrate, containing approximately 30% of bornite (Cu5FeS4) and 70% of chalcopyrite (CuFeS2), for extracting copper. The ob...

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Bibliographic Details
Published inDyna (Medellín, Colombia) Vol. 79; no. 172; pp. 133 - 140
Main Authors Luis Sobral Sobral, de Barros Lima, Renata, SELMA GOMES FERREIRA LEITE, GABRIELLA SILVA FRANCISCO PEREIRA, ISABELLA CESARIO DE AMARAL
Format Journal Article
LanguageEnglish
Portuguese
Published Bogota Universidad Nacional de Colombia 01.04.2012
Subjects
acidophilic microorganism
bioleaching
biolixiviación
calcopirita
chalcopyrite
cobre
copper
ENGINEERING, MULTIDISCIPLINARY
microorganismos acidófilos
sulfato
sulphide
calcopirita
Bioleaching
microorganismos acidófilos
acidophilic microorganism
sulfato
Biolixiviación
copper
cobre
sulphide
chalcopyrite
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Summary:This work aimed at approaching the use of concentrated mesophile and thermophile microorganisms (moderate and extreme ones) in leaching process of copper sulphides flotation concentrate, containing approximately 30% of bornite (Cu5FeS4) and 70% of chalcopyrite (CuFeS2), for extracting copper. The objective of the bioleaching tests was to evaluate the performance of those microorganisms, varying specific parameters such as: the composition of leaching solution, the presence of energy source (ferrous sulphate) and the inoculation of cultures as such (controlling tests). To ensure optimal conditions for the microorganisms to act, the pH, temperature and stirring speed were controlled. Finally, from the microbial action and using agricultural fertiliser (N:P:K sources), a copper extraction of higher than 85% was achieved.
ISSN:0012-7353
2346-2183