CAS OpenIR
Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
Jia, Yan1,2; Sun, Heyun1,2; Tan, Qiaoyi1,2; Xu, Jingyuan3; Feng, Xinliang3; Ruan, Renman1,2
2021-11-01
Source PublicationMINERALS
Volume11Issue:11Pages:15
AbstractSulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0-2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore that began with only water irrigation without the addition of sulfuric acid was successfully implemented and introduced in this manuscript. The mineral composition and their behavior related to the production and consumption of sulfuric acid during the bioleaching in heaps was analyzed. This indicated the possibility of self-generating of sulfuric acid in heaps without exogenous addition. After proving by batches of laboratory tests, industrial measures were implemented to promote the sulfide mineral oxidation in heaps throughout the acidifying stages, from a pH of 7.0 to 1.0, thus sulfuric acid and iron was produced especially by pyrite oxidation. After acidifying of the heaps, adapted microbial consortium was inoculated and established in a leaching system. The launch of the bioleaching heap and finally the production expansion were realized without the addition of sulfuric acid, showing great efficiency under low operation costs.
Keywordcopper sulfide ore heap bioleaching pyrite sulfuric acid water irrigation
DOI10.3390/min11111299
Language英语
WOS KeywordFERROUS IRON OXIDATION ; PYRITE OXIDATION ; DISSOLVED-OXYGEN ; MINE DRAINAGE ; SULFATE-IONS ; DISSOLUTION ; KINETICS ; TEMPERATURE ; CHEMISTRY ; SURFACE
Funding ProjectInnovation Academy for Green Manufacture, the Chinese Academy of Sciences[IAGM-2019A08] ; National Natural Science Foundation of China[51674231]
WOS Research AreaGeochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
Funding OrganizationInnovation Academy for Green Manufacture, the Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS IDWOS:000726679700001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51272
Collection中国科学院过程工程研究所
Corresponding AuthorRuan, Renman
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Res, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Norin Min Ltd, Beijing 100053, Peoples R China
Recommended Citation
GB/T 7714
Jia, Yan,Sun, Heyun,Tan, Qiaoyi,et al. Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation[J]. MINERALS,2021,11(11):15.
APA Jia, Yan,Sun, Heyun,Tan, Qiaoyi,Xu, Jingyuan,Feng, Xinliang,&Ruan, Renman.(2021).Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation.MINERALS,11(11),15.
MLA Jia, Yan,et al."Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation".MINERALS 11.11(2021):15.
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