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Bioleaching of sphalerite flotation concentrate
QIN Wenqing * #,WANGJun *,QIU Guanzhou
Central South University
*Correspondence author
#Submitted by
Subject:
Funding: 教育部博士点基金（No.20050433009）
Opened online:18 July 2006
Accepted by: none
Citation: QIN Wenqing,WANGJun,QIU Guanzhou.Bioleaching of sphalerite flotation concentrate [OL]. [18 July 2006] http://en.paper.edu.cn/en_releasepaper/content/7624
 
 
Elective culture of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidanin in modified 9K medium （containing pyrrhotite）was studied in this paper. Bioleaching of sphalerite flotation concentrate by the selected bacteria was carried out. The results showed that the microorganisms cultured by pyrrhotite were a mixture of Acidithiobacillus ferrooxidans andAcidithiobacillus thiooxidans of which the capability to oxidize ferrous to ferric irons was enhanced by the high ratio of Fe/S in pyrrhotite. Five pyrrhotite samples were separated into various parts with corresponding S/Fe ratios by magnetic separation and were used to culture the elective bacteria as the substrate. The association of the cultures could provide a more rapid and complete oxidation of sphalerite than that of bacteria cultivated by conventional methods.
Keywords:Pyrrhotite; Elective culture; Bacteria; Bioleaching; sphalerite
 
 
 

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