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Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteria
Ruan Renman1,2; Zhou E2,3; Liu Xingyu4; Wu Biao4; Zhou Guiying4; Wen Jiankang4; Ruan, RM
Source PublicationRARE METALS
AbstractThe acid leaching, ferric leaching, and bioleaching of chalcocite and pyrite minerals were conducted in two sets of 3L stirred reactors The dissolution rates of copper and iron were correlated with leaching conditions In the acid leaching process, the dissolution rate of chalcocite was around 40wt % while that of pyrite was less than 4% In the ferric leaching process with high ferric concentration, only 10 wt % of iron in pyrite was leached out at the same retention time though the copper recovery over 60 wt % in chalcocite For the bioleaching process the chalcocite leaching rate was highly increased, nearly 90 wt % of copper was leached out, and the iron dissolution of pyrite exceeded 70 wt % For the two minerals the bioleaching shows the highest leaching rate compared with the acid leaching or ferric leaching In uncontrolled bioleaching process pyrite could be dissolved effectively The experimental data were fitted to the shrinking core and particle model The results show that in all the leaching tests, the chalcocite leaching was mainly controlled by diffusion, while for the pyrite leaching chemical reaction is the main rate-determining step
KeywordChalcocite Pyrite Kinetic Model Bioleaching
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000284199900002
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorRuan, RM
Affiliation1.Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
2.Zijin Min Grp Co Ltd, Shanghang 364200, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Beijing 100090, Peoples R China
4.Gen Res Inst Nonferrous Met, Natl Engn Lab Biohydromet, Beijing 100088, Peoples R China
Recommended Citation
GB/T 7714
Ruan Renman,Zhou E,Liu Xingyu,et al. Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteria[J]. RARE METALS,2010,29(6):552-556.
APA Ruan Renman.,Zhou E.,Liu Xingyu.,Wu Biao.,Zhou Guiying.,...&Ruan, RM.(2010).Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteria.RARE METALS,29(6),552-556.
MLA Ruan Renman,et al."Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteria".RARE METALS 29.6(2010):552-556.
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