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Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system
Zhang, Xu1,2; Feng, Ya-li1; Li, Hao-ran2
2016-09-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume26Issue:9Pages:2479-2484
Abstract

Pyrolusite was added in the bioleaching process to enhance the bio-oxidation process. Bioleaching tests at different dosages of pyrolusite ore, pH and inoculation amounts of Acidithiobacillus ferrooxidans were studied. The results showed that the time of the bio-oxidation process was decreased obviously and the arsenic leaching rate reached 94.4% after the bioleaching. The bio-oxidation of arsenopyrite and the effective extraction of manganese from pyrolusite were achieved by the bioleaching process. After bioleaching, the leaching rate of gold from the reaction residues reached 95.8% by cyanide leaching. In the bio-oxidation process, pyrolusite increased the redox potential of the solution to accelerate the bioleaching rate. The experiment showed that there were two reaction modes in the bioleaching process.

KeywordArsenopyritic Gold Ore Pyrolusite Bio-oxidation Acidithiobacillus Ferrooxidans
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(16)64339-X
Indexed BySCI
Language英语
WOS KeywordHIGH-SULFUR ; CONCENTRATE ; OXIDATION ; EFFICIENCY ; MANGANESE ; MECHANISM
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Water Pollution Control and Treatment Science, China(2015ZX07205-003) ; China Ocean Mineral Resource R D Association(DY125-15-T-08) ; National Key Technology R & D Program of China(2012BAB07B05) ; National High-tech Research and Development Program of China(2012AA062401)
WOS IDWOS:000386345500025
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21574
Collection生化工程国家重点实验室
Affiliation1.Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xu,Feng, Ya-li,Li, Hao-ran. Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(9):2479-2484.
APA Zhang, Xu,Feng, Ya-li,&Li, Hao-ran.(2016).Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(9),2479-2484.
MLA Zhang, Xu,et al."Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.9(2016):2479-2484.
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